JPH06115685A - Board carrying device for mounting machine - Google Patents

Abstract

PURPOSE:To move a board from a board waiting part to a mounting work part efficiently, and prevent the generation of trouble such as a ride-on of the next board on the former board in a board carrying device for mounting machine. CONSTITUTION:A board carrying device for mounting machine is provided with a stopper holding member 41, which can be moved freely from a backward position corresponding to a board waiting part to a forward position corresponding to a mounting work part, and a driving means for driving this stopper holding member 40, and a stopper member 42, which is provided in the stopper holding member 41 and of which position can be changed to the stopper position and the retreat position, and a cylinder 43 for driving this stopper member 42. The stopper holding member 41 is moved to the forward position at the time of moving a board from the board waiting part to the board mounting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board carrying device for carrying a board in a mounting machine for mounting a chip component such as an IC on the board.

[0002]

2. Description of the Related Art Conventionally, a board carrying means for carrying a board along a carrying line and a board holding means for holding a board in a predetermined mounting work part on the carrying line are provided, and the board work means is provided at the mounting work part. 2. Description of the Related Art A mounting machine is known which automatically carries out the work of mounting a chip component on a board, automatically carries the board to the mounting work part, and carries out the board after mounting.

FIG. 12 shows an example of a conventional board transfer device in this type of mounting machine. This transport device has a mounting work portion A in the middle of the transport line by the transport belt 2 and a substrate standby portion B for holding the next substrate on the upstream side thereof, and the front end of the mounting work portion A. A main stopper 101 is provided at the position so as to be able to move up and down, and a sub stopper 102 is provided at the front end position of the substrate standby portion B. Then, when the board is transferred to the mounting work portion A, the main stopper 101 is raised so that the board P ₁ transferred by the conveyor 2 comes into contact with the main stopper 101 and stops, and the positioning pins 103,
The work is carried out while being held in the state of being positioned at 104. Then, when the mounting work is completed, the main stopper 101 is lowered, the substrate P ₁ is carried out, and then the sub stopper 102 is lowered and the substrate P ₂ is moved forward.

[0004]

In the mechanism as described above, the work efficiency is improved by simultaneously carrying out the substrate P ₁ from the mounting work portion A and moving the substrate P ₂ to the mounting work position. Can be expected. However, in this case, since the distance between the substrate P ₁ to be carried out and the subsequent substrate P ₂ is small, it is very difficult to raise the main stopper 101. Further, when the substrate P ₁ to be unloaded can not move supported by something, or the speed is lowered, situation in which the next substrate P ₂ damaging the substrate P ₁ rides in front of the substrate P ₁ Occurs. To avoid this situation,
Conventionally, the next substrate P ₂ is taken in after the substrate P ₁ is unloaded, and the work efficiency has not been sufficiently enhanced.

In view of the above circumstances, it is an object of the present invention to provide a substrate transfer device capable of efficiently moving a substrate to a mounting work portion and solving the above problems in this case. And

[0006]

In order to achieve the above-mentioned object, a board carrying means for carrying a board along a carrying line, and a board holding for holding the board in a positioning state at a predetermined mounting work portion on the carrying line. And a board movement restricting device provided in a portion along the transfer line in a board transfer device of a mounting machine having a board standby portion on a transfer line on a loading side with respect to a mounting operation part. The apparatus includes a stopper holding member that is movable in the direction of the transfer line from a retracted position corresponding to the substrate standby portion to an advanced position corresponding to the mounting work portion, and a driving unit that moves the stopper holding member. Provided on the stopper holding member, the position can be changed between the stopper position corresponding to the substrate on the transfer line and the retracted position to avoid the substrate. And a drive means for operating the stopper member, and a control means for controlling the stopper holding member and the stopper member is provided for the substrate movement restricting device, and the control means is the stopper. When the holding member is in the retracted position, the stopper member is set to the stopper position, and when the board is moved from the board standby portion to the board mounting operation portion, the stopper member is held in front of the board and the stopper is held. Each of the above driving operations is performed such that the member is moved to the forward position, the stopper member is moved to the retracted position when the substrate reaches the mounting work portion, and the substrate holding means is activated, and then the stopper holding member is returned to the retracted position. It controls the means.

[0007]

According to the above construction, the next board is stopped by the stopper member of the board movement restricting device in the board standby portion during the mounting work, and the stopper member precedes the board when the board is moved to the mounting work portion. The substrate is stopped at this position when it reaches a predetermined position of the mounting work portion.

[0008]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the overall structure of a mounter equipped with a substrate transfer device according to an embodiment of the present invention. In these figures, a transfer line L having a board transfer means composed of a pair of printed board transfer conveyors 2 extending in parallel at a predetermined interval is arranged on a base 1. Both sides of the substrate P are supported by the conveyor 2 while being transported in a fixed direction, and are transported from the right side to the left side in this figure. The substrate P is stopped at a predetermined mounting work portion A on the transfer line L and is held in a positioned state as described later. A carry-in detection sensor 3 and a carry-out detection sensor 4 are arranged at the end of the conveyor 2 on the board loading side and the end of the board unloading side, respectively.

In order to mount a chip component on the substrate P at the mounting work portion A, a component supply section 5 and a head unit 6 are provided. The component supply unit 5 is located on the outer side of the conveyor 2 and includes a plurality of rows of supply tapes 5a wound around reels, and each supply tape 5a is in the form of a small piece such as an IC, a transistor, or a capacitor. The chip components can be stored and held at equal intervals, and can be sequentially fed out.

The head unit 6 can be moved in the X-axis direction (direction of the conveyor 2) and the Y-axis direction (direction on the horizontal plane orthogonal to the X-axis). That is, a pair of fixed rails 7 extending in the Y-axis direction and a ball screw shaft 8 which is rotationally driven by a Y-axis servomotor 9 are arranged on the base 1, and the head unit is mounted on the fixed rails 7. A support member 11 is arranged, and a nut portion (not shown) provided on the support member 11 is screwed onto the ball screw shaft 8. A guide member 13 extending in the X-axis direction and a ball screw shaft 14 driven by an X-axis servomotor 15 are arranged on the support member 11, and the head unit 6 can be moved on the guide member 13. A nut portion (not shown) that is held and provided on the head unit 6 is screwed onto the ball screw shaft 14. Then, the ball screw shaft 8 is rotated by the operation of the Y-axis servomotor 9 to move the support member 11 in the Y-axis direction, and the ball screw shaft 14 is rotated by the operation of the X-axis servomotor 15, so that the head unit is rotated. 6 moves in the X-axis direction with respect to the support member 11.

The head unit 6 is provided with an appropriate number of suction nozzles 16 (see FIG. 3) for suctioning chip components. The suction nozzles 16 move in the Z-axis direction (vertical direction) and R-axis (nozzle). Rotation around the central axis) is possible, and the Z-axis servomotor 17 and the R-axis servomotor 18
It is designed to be activated by. Each suction nozzle 16
In contrast, negative pressure for adsorption is supplied when needed.

At the time of mounting work, the suction nozzle 16 of the head unit 6 sucks a component from the component supply section 5 and mounts it on a predetermined position on the substrate.

2 to 4 show the parts constituting the substrate transfer device, and in these figures, 20 is a pair of frame members 20.
A base frame for a conveyor having a and 20b, and its frame 2
The conveyor 2 is mounted on the upper ends of the base plates 0a and 20b, and the conveyor motor 21 is attached to a predetermined position of the base frame 20. Further, a pair of front and rear positioning pins 22 and 23 and a pusher 30 are provided as a board holding means for holding the board P in a mounted state at the mounting work portion A.

The pair of positioning pins 22 and 23 are for positioning the substrate P by engaging with engaging holes (not shown) provided in front and rear two positions of the substrate P in advance. It is adapted to be engaged with and disengaged from the substrate P by being moved up and down by being actuated by the cylinders 24, 25 for use. Of these, the positioning pin 22 and the cylinder 24, which are located on the front side in the substrate transport direction, are attached to the frame body 20a via brackets at fixed positions. On the other hand, the rear positioning pin 23 and the cylinder 2
5 is a positioning pin 22 on the front side according to the size of the board.
The position is changeable so that the distance to and can be adjusted. In the illustrated embodiment, in order to facilitate the position changing work, the cylinder 25 is attached to the belt 26 for adjusting the pin mounting position.
The positioning pin 23 is attached via a bracket, and the handle 27 is connected to the pulley around which the belt 26 is wound. When the handle 27 is operated, the belt 26 operates to move the position of the positioning pin 23. Is changing. Reference numeral 28 is a clamp that locks the handle and fixes the positioning pin.

Further, the pusher 30 pushes up the substrate P from the lower surface side in the mounting work portion A so as to separate the substrate P from the conveyor 2 and press it against the plate 33 above the conveyor. It is installed on 31 and can be moved up and down by raising and lowering this base plate 31 by a pusher cylinder 32. The installation position of the pusher 30 on the base plate 31 can be freely changed.

Further, it is detected that the fixed position stopper 35, which is located at the front end of the mounting work portion A and is moved up and down by the cylinder 36, and the substrate P reach the mounting work portion A on the inner side of the frame 20a. A first substrate sensor S ₁ , a second substrate sensor S ₂ for detecting that the substrate P has reached a substrate standby portion B behind the mounting work portion A, and the like are provided.

A substrate movement restricting device 40 is provided on the inner side of the frame body 20b of the conveyor base frame 20. Figure 5
As shown in FIG. 7, the substrate movement restricting device 40 includes a stopper holding member 41 that can move in the direction of the transfer line.
And a stopper member 42 and a stopper member driving cylinder 43 (driving means) provided at the tip of the stopper holding member 41. The stopper holding member 41 is formed by a rodless cylinder and also serves as a driving means. The stopper holding member 41 is held by a cylinder holder 44 attached to the frame body 20b so as to be movable in the conveying line direction via a guide 45, and the inside of the cylinder. The cylinder itself is configured to move back and forth with respect to the cylinder holder 44 according to the supply and discharge of pressurized air to and from the front and rear air chambers.
A stopper member driving cylinder 43 is fixed near the front end of the stopper holding member 41.
A stopper member 42 is provided on the upper end portion of the rod projecting upward from 3.

The stopper member 42 moves from the position near the front end of the board standby portion B to the position near the front end of the mounting work portion A by the operation of the stopper holding member 41, and the cylinder 43 of the cylinder 43 moves. By the operation, the substrate P is moved from a position below the substrate P on the conveyor.
It is designed to go up and down within a range of heights corresponding to.

A dog 46, which is a detected portion, is attached to the front end portion of the stopper holding member 41 via a bracket 47. On the other hand, in the frame body 20b,
A forward position detecting sensor S _F and a backward position detecting sensor S _B are attached to a predetermined position in front of the mounting work part A and a predetermined position in front of the substrate waiting part B, and when the stopper holding member 41 moves forward, it moves backward. At this time, the dog 46 is detected by reaching the positions of the sensors S _F and S _B.

[0020] Incidentally, the distance between the substrate P ₂ in the substrate P ₁ and the substrate standby section B in the mounting operation portion A as much as possible close, change the position where the tip of the substrate standby section B in accordance with the size of the substrate It is advantageous to improve the transportation efficiency. Therefore, although not shown, a large number of mounting holes for the substrate movement restricting means 40 are provided in the frame body 20b so that the mounting position can be changed.

Further, the bracket 48 forward position detection sensor S _F is attached, the shock absorber 49 is also attached. This shock absorber 4
Reference numeral 9 is for preventing rattling or displacement of the substrate P by abutting against the stopper holding member 41 when the stopper holding member 41 reaches the advanced position and absorbing the impact.

FIG. 8 shows an air supply / discharge system for the drive portion and the like of the substrate position regulating device. For the stopper holding member 41, the passage 5 leading to the air chambers before and after the stopper holding member 41 is provided.
A solenoid valve 54 is provided between 1, 52 and the pressurized air supply passage 53 to switch the pressurized air to the front air chamber and the rear air chamber. Further, with respect to the stopper member driving cylinder 43, the passages 55 and 56 communicating with the upper and lower air chambers and the pressurized air supply passage 5 are provided.
7, a solenoid valve 58 is provided for switching the pressurized air to the upper air chamber and to the lower air chamber. Similarly to other various cylinders, the supply and discharge of the pressurized air can be switched via the solenoid valve.

FIG. 9 shows a control system, which is a controller 60.
Through the I / O board 61, the sensors S ₁ , S ₂ ,
The signals from S _F and S _B are input. On the other hand, for the conveyor motor 21, the solenoid valve 54 for the stopper holding member 41, the solenoid valve 58 for the stopper member driving cylinder 43, the solenoid valve 62 for the positioning pin cylinder 24, and the solenoid valve 63 for the pusher cylinder 32. , The control signal is being output.

The operation of the transport mechanism controlled by the controller 60 will be described with reference to the flowchart of FIG.
Will be described with reference to FIG. Note that the mounting work of the chip component on the substrate P ₁ in the mounting work portion A is performed as shown in FIG.
It is performed in a routine (not shown) different from 0.

In FIG. 10, first, in step S1, it is determined whether or not the mounting work is completed. During the mounting work, as shown in FIG. 11A, the board P ₁ located in the mounting work portion A is positioned by the positioning pins 22 and 23 and pushed up by the pusher 30. Further, normally, the next substrate P ₂ is loaded in the substrate standby portion B behind the mounting work portion A, the stopper holding member 41 is in the retracted position, and the stopper member 42 is raised to the stopper position. As a result, the advance of the substrate P _{2 in} the standby state is blocked.

When the mounting work is completed, it is determined in step S2 of FIG. 10 whether the second substrate sensor S ₂ is ON. If the determination is YES, the conveyor 2 is driven (step S2). S3), positioning pins 22, 2
3 and pusher 30 are lowered (step S4),
Further, the stopper holding member 41 is operated in the forward direction (step S5). As a result, as shown in FIG. 11B, the mounted substrate P ₁ is unloaded and the next substrate P ₂ is moved to the mounting work portion A at the same time, and the stopper member 4
2 moves ahead of the substrate P ₂ .

Next, in step S6, the first substrate sensor S
₁ and the advanced position detecting sensor S _F is determined whether the both ON. When the determination is YES, both the substrate P ₂ and the stopper member 42 have reached the predetermined position of the mounting work portion A. In this case, as shown in FIG. 11C, the positioning pins 22, 23 and Pusher 3
0 is raised (step S7), and the stopper member 42 is lowered (step S8).
As shown in (d), the stopper holding member 41 is operated in the backward direction (step S9). At this stage, mounting work is started.

Subsequently, in step S10, it is determined whether or not the backward position detection sensor S _B is ON, and the determination is Y.
At the time of ES, that is, when the stopper holding member 41 returns to the original retracted position, the stopper holding member 41 is stopped and the stopper member 42 is raised (step S11), and then a new substrate is loaded and the stopper is held. The member 42 restrains the substrate waiting portion B at a predetermined position (step S12). The determination in step S2 is N
When it is O, it means that the board has not been carried into the board standby position B, and in this case, the mounted board is simply carried out (step S13).

By such control, the stopper member 42 restrains the substrate P ₂ in the substrate standby portion B during the mounting work, and functions as a conventional sub-stopper. After the mounting work, the stopper member 42 moves forward at the same time that the mounted substrate P ₁ is unloaded, and the next substrate P ₂ moves forward accordingly, so that the mounting member A can be efficiently moved. In this case, when the preceding mounted board P ₁ is stopped or decelerated by being supported by something, the stopper member 42 abuts against it, and the stopper member 42 pushes the board P ₁ . The substrate P ₂ does not ride on the preceding substrate P ₁ . If the board does not move for a certain period of time or longer, the drive is stopped and an abnormality is displayed.

Further, when the predetermined advance position is reached, the stopper member 42 stops the substrate until the positioning pins 22 and 23 perform positioning, and therefore also serves as a conventional main stopper.

Since the stopper member 42 also serves as the main stopper, the fixed position stopper 35 described above is used.
Normally, this is not necessary, but if the substrate cannot be positioned by the positioning pins 22 and 23 because it has no engaging hole, the home position stopper 35 is activated.

The specific structure of the device of the present invention is not limited to the above embodiment, but can be modified. For example, the stopper holding member is not limited to the rodless cylinder, but may be operated by a cylinder having a rod or by a motor. Further, the stopper member may be one that is swingably movable between the stopper position and the retracted position.

[0033]

As described above, the substrate transfer apparatus of the present invention is
A stopper holding member movable from a retracted position corresponding to the board standby portion to an advanced position corresponding to the mounting work portion, a driving means for this member, and a stopper position and a retracted position provided on the stopper holding member. A substrate movement restricting device having a stopper member whose position can be changed and a driving means for this member is provided, and when the stopper holding member is in the retracted position, the stopper member is set to the stopper position and the substrate standby When the substrate is moved from the portion to the mounting work portion, the stopper holding member is moved to the forward position, and when the substrate reaches the mounting work portion and the substrate holding means is operated, the stopper member is moved to the retracted position. Therefore, the stopper holding member is controlled to return to the retracted position. For this reason, it is possible to surely and efficiently perform the operations of stopping the board in the board standby portion, moving to the mounting work portion, and stopping the mounting work portion. In particular, even if the next board is moved to the mounting work area at the same time that the board is carried out after the mounting work, there is a stopper member in front of the board, so that the next board gets on the preceding board Can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a plan view of a mounter including a substrate transfer device according to an embodiment of the present invention.

FIG. 2 is a plan view of a portion constituting a substrate transfer device.

FIG. 3 is a front view of the same portion.

FIG. 4 is an enlarged side view of the same portion.

FIG. 5 is an enlarged view of a portion where a substrate movement restriction device is provided.

FIG. 6 is an enlarged front view of the substrate movement restriction device.

FIG. 7 is an enlarged side view of the substrate movement restricting device.

FIG. 8 is an explanatory diagram showing a pressurized air supply system.

FIG. 9 is a block diagram of a control system.

FIG. 10 is a flowchart of control.

11 (a), (b), (c) and (d) are operation explanatory views.

FIG. 12 is a diagram showing a conventional technique.

[Explanation of symbols]

 L transport line P substrate 2 conveyors 22 and 23 positioning pins 40 substrate movement regulating device 41 stopper holding member 42 stopper member 43 cylinder

Claims (1)

[Claims] 1. A board carrying means for carrying a board along a carrying line, and a board holding means for holding the board in a positioning state at a predetermined mounting work part on the carrying line, and a carrying-in side for the mounting work part. In a board transfer device of a mounting machine having a board standby portion on the transfer line, a board movement restricting device is provided at a portion along the transfer line, and the board movement restricting device has a retracted position corresponding to the board waiting part. To a forward position corresponding to the mounting work part, a stopper holding member movable in the direction of the transfer line, a driving means for moving the stopper holding member, and a stopper provided on the stopper holding member on the transfer line. Stopper member that can be moved between the stopper position corresponding to the substrate and the retracted position to avoid the substrate, and this stopper A drive means for operating the member,
A control means for controlling the stopper holding member and the stopper member is provided for the substrate movement restricting device,
The control means sets the stopper member to the stopper position when the stopper holding member is in the retracted position, and positions the stopper member in front of the board when the board is moved from the board standby portion to the board mounting operation portion. In this state, the stopper holding member is moved to the forward position, and when the substrate reaches the mounting work portion and the substrate holding means is operated, the stopper member is moved to the retracted position and then the stopper holding member is moved to the retracted position. To put it back
A board transfer device of a mounting machine for controlling each of the driving means.