JPH06336351A - Conveyer for printed wiring board and positioning device thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a printed wiring board transfer device that does not need to change settings such as the position of the feed claw and the transfer stroke even if the size and type of the printed wiring board changes. To do. A printed wiring board carrying device for carrying a printed wiring board from a loading unit to a board positioning unit can be engaged with a rear end of the printed wiring board and can be moved along a carrying direction of the printed wiring board. It has one feed claw 21, and the feed claw 21 is configured to move the printed wiring board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board transfer device and a printed wiring board positioning device suitable for use in a mounting machine for automatically mounting electronic components and the like on a printed wiring board.

[0002]

2. Description of the Related Art FIG. 12 shows a conventional example of a mounting machine for automatically mounting electronic components on a printed wiring board.
The part of the printed wiring board replacement device is shown. The printed wiring board replacement device is a loading unit 11
It has a printed wiring board positioning unit 13, an unloading unit 15, and a printed wiring board transfer device 17.

The printed wiring board 10 is conveyed to the tip (left end) of the loading unit 11 from the right hand of the drawing by a conveyor belt. Next, the printed wiring board 10 is transferred from the loading unit 11 to the printed wiring board positioning unit 13 by the printed wiring board transfer device 17.

The printed wiring board positioning unit 13 is, as shown in the figure, a conveying direction (x direction) of the printed wiring board.
And a movable part that is movable in a direction (y direction) perpendicular thereto, so that the printed wiring board 10 can move in the x direction and the y direction.
It can be moved a desired distance in any direction. In this way, the printed wiring board 10 is accurately arranged at a predetermined position by the printed wiring board positioning unit 13, and electronic parts and the like are mounted on the surface thereof.

When the mounting process of the printed wiring board 10 is completed, the printed wiring board 10 is transferred to the unloading unit 15 by the printed wiring board transfer device 17. A lead-out confirmation sensor 25 is attached to the printed wiring board transfer device 17, and it is confirmed by the lead-out confirmation sensor 25 that the printed wiring board 10 has been transferred to the unloading unit 15.

The printed wiring board transfer device 17 has a transfer moving part 19, and the transfer moving part 19 has two feed claws 2.
Has 1. When the transport moving unit 19 moves in the transport direction, the two feed claws 21 move in the transport direction.

FIG. 13 shows details of the printed wiring board positioning unit 13. The printed wiring board positioning unit 13 has an XY table 45 arranged on the lower side, a rail width adjusting device 43 arranged on the XY table 45, and conveyor rails 35, 35 arranged on the XY table 45. As shown in the drawing, the printed wiring board is transported by the feed claw 21 at the tip of the feed lever 29 mounted on the transport moving unit 19.

In FIG. 14, a printed wiring board 10A arranged at the left end of the loading unit 11, a printed wiring board 10B arranged in the printed wiring board positioning unit 13, and a printed wiring arranged in the unloading unit 15 are shown. The substrate 10C and the substrate 10C are indicated by a chain line.

In this example, the printed wiring board 10A arranged in the loading unit 11 is moved by the transfer unit 19.
It is sandwiched between the two feeding claws 21 and is supported between them. That is, with the two feed claws 21 supported so as to sandwich the front and rear sides of the printed wiring board 10, the transport moving unit 19
The printed wiring board 10 moves by moving.

When the printed wiring board positioning unit 13 is transferred to the unloading unit 15,
Similarly, with the two feeding claws 21 supported so as to sandwich the front and rear sides of the printed wiring board 10B, the transport moving unit 19
Is moved, the printed wiring board 10B is moved.

FIG. 15 shows the relationship between the two feed claws 21 mounted on the transport moving section 19 of the printed wiring board transport device 17 and the printed wiring board 10. FIG. 15A is the same as the example shown in FIG.
Fig. 15B shows a state in which the front and rear ends of 0 are engaged.
Two feed claws 21 are two holes 27 of the printed wiring board 10.
FIG. 15C shows that the front feed pawls 21 engage with the rear holes 27 of the printed wiring board 10 and the rear feed pawls 21 engage with the rear end of the printed wiring board 10. Shows the state of matching.

[0012]

In the example of the conventional printed wiring board transfer device 17, since the two feed claws 21 are used, the distance between the two feed claws 21 is changed according to the size and type of the printed wiring board 10. , X-direction and y-direction positions had to be changed.

For example, in the example shown in FIG. 15A, when the length L1 in the longitudinal direction of the printed wiring board 10 changes, the distance between the two feed claws 21 must be changed correspondingly. In the example shown in FIG. 15B, when the position of the hole 27 of the printed wiring board 10 and the distance L2 between the two holes 27 change, the positions and the intervals of the two feed claws 21 must be changed correspondingly. . In the example shown in FIG. 15C, when the distance L4 (= L3−L2) between the rear end of the printed wiring board 10 and the rear hole 27 changes, the positions and intervals of the two feed claws 21 change correspondingly. Had to let.

In view of the above point, the present invention has an object to provide a printed wiring board transfer device which does not need to change the position and interval of the feed claws 21 even if the size and type of the printed wiring board 10 change. And

[0015]

According to the present invention, for example, as shown in FIG. 1, in a printed wiring board carrying device for carrying a printed wiring board to a predetermined position, the rear end of the printed wiring board is engaged. And a single feed claw 21 that can move along the conveyance direction of the printed wiring board.
The feed claw 21 is configured to move the printed wiring board.

According to the present invention, as shown in FIG. 3, for example, in a printed wiring board transfer device, the speed of the printed wiring board is controlled by frictional force.

According to the present invention, for example, as shown in FIG. 10, an overload detection device is provided in a printed wiring board transfer device, and the printed wiring board is moved by the feed claws in this overload detection device. It is sometimes configured to detect when an obstacle is encountered.

According to the present invention, for example, as shown in FIGS. 7 to 9, the upper guide rail 35A and the lower guide rail 3 are provided.
In the printed wiring board positioning device for supporting the conveyed printed wiring board 10 having the 5B between the upper guide rail 35A and the lower guide rail 35A, the stopped position of the conveyed printed wiring board 10 is the printed wiring board. It is controlled by the frictional force between 10 and the upper guide rail 35A and the lower guide rail 35B.

According to the present invention, for example, as shown in FIG. 9, in the printed wiring board positioning device, the friction force is controlled by the urging force of the spring 41 mounted on the upper guide rail 35A or the lower guide rail 35B. It is configured.

According to the present invention, for example, as shown in FIGS. 7 to 8, in the printed wiring board positioning device, the upper guide rail 35A and the lower guide rail 35B are pin 4 pins.
9 and the lower guide rail 35B is pin 4
The lower guide rail 35B is urged in the direction of the upper guide rail 35A by a spring 41 arranged along the line 9, and is slidably supported by a linear bush 47 arranged along the pin 49.

[0021]

According to the printed wiring board carrier of the present invention,
Since one feed claw 21 is used and the feed claw 21 is configured to engage with the rear end of the printed wiring board 10, even if the size and type of the printed wiring board 10 change, There is no need to adjust the relative distance between the two feed claws 21 as in the conventional case.

According to the printed wiring board positioning apparatus of the present invention, the printed wiring board 10 can be stopped at a desired stop position by controlling the frictional force.

[0023]

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 12 to 11 in FIGS.
Corresponding parts in FIG. 15 are designated by the same reference numerals, and detailed description thereof will be omitted.

An example of the printed wiring board carrying device of the present invention will be described with reference to FIG. The printed wiring board transfer device of this example has one feed claw 21. The other parts of the printed wiring board carrying device of this example may be the same as the conventional printed wiring board carrying device shown in FIG.

The feed claws 21 are attached to the transfer moving unit 19 (see FIG. 12) of the printed wiring board transfer device (not shown),
It is configured to engage with the rear end of the printed wiring board 10A.

In FIG. 1, the printed wiring board 10A conveyed to the left end of the loading unit 11 by a conveyor belt (not shown) and the prints transferred from the loading unit 11 to the printed wiring board positioning unit 13 by the printed wiring board conveying device. Wiring board 10B
And the printed wiring board 10C transferred from the printed wiring board positioning unit 13 to the unloading unit 15 by the printed wiring board transport device are indicated by a chain line.

The feed claw 21 is engaged with an appropriate position at the rear end of the printed wiring board 10A. For example, the feed claw 21 is engaged with the center of the rear end of the printed wiring board 10A. still,
As shown in FIG. 2A, the feed claw 21 extending upward at the tip.
It is also possible to use the feed lever 29 having

The printed wiring board 10 is provided by the feed claw 21.
In order for the printed wiring board 10 to move smoothly, the feed claws 21 must always be in contact with the printed wiring board 10 during the movement of the printed wiring board 10. For example, as shown in FIG. 2A, when the moving speed of the feed claw 21 is decelerated, the printed wiring board 10 may run away and stop at a distance L ahead of the stop position of the feed claw 21 when stopped.

In order to prevent such an overrun of the printed wiring board 10, a feed lever 29 as shown in FIG. 2B, for example, is proposed. This feed lever 29 has a feed claw 21.
-1 having a rear side portion 29-1 and a front side portion 29-2 having a stopper 21-2 for preventing overrun. The front portion 29-2 is configured to be movable in the front-rear direction within a predetermined range with respect to the rear portion 29-1.

When the printed wiring board 10 is conveyed by the feed claws 21-1, the front end portion of the printed wiring board 10 is engaged with the stopper 21-2 to prevent the printed wiring board 10 from overrunning. In this example, the printed wiring board 10 does not overrun beyond the maximum value of the distance between the feed claw 21-1 and the stopper 21-2, but when using the printed wiring board 10 having different lengths in the front-rear direction. Must use different feed levers 29.

Next, control of the moving speed of the printed wiring board 10 according to the present embodiment will be described with reference to FIGS. 3 and 4. According to this example, the moving speed of the feed claws 21 is controlled so that the feed claws 21 are always in contact with the printed wiring board 10 while the printed wiring board 10 is moving. As a result, overrun of the printed wiring board 10 is prevented.

The feed claw 21 is used for the printed wiring board carrier device 1.
7 is mounted on the transport moving unit 19 (see FIG. 12), and the transport moving unit 19 is mounted on the transport belt 31, for example. When the transport belt 31 moves, the feed claw 21 mounted on the transport moving unit 19 moves. Printed wiring board 10
Is fed from the conveyor rail of the loading unit 11 by the feed claw 21 to the printed wiring board positioning unit 13
It is conveyed to the conveyor rail 35. When the printed wiring board 10 is transferred to the printed wiring board positioning unit 13, the feed claw 21 retracts and separates from the printed wiring board 10.

FIG. 4 is a graph showing the speed of such a printed wiring board 10. In this graph, the vertical axis represents the moving speed of the printed wiring board 10, and the horizontal axis represents time. At time t = 0, the feed claw 21 moves to the printed wiring board 10.
The printed wiring board 10 contacts the rear end of the acceleration A
₁ = v ₁ / t _{1, and} at time t = t ₁ -t ₂ ,
The printed wiring board 10 moves at a constant speed v ₁ , and the printed wiring board 10 accelerates A ₁ at time t = t _{2 to} t _3.
= −v ₁ / (t ₃ −t ₂ ).

At the time of deceleration from time t = t _{2 to} t ₃ , the feed claw 2
It is desirable that 1 is in contact with the rear end of the printed wiring board 10. The speed of the feed pawl 21 is controlled in relation to the frictional force acting on the printed wiring board 10 so that the feed pawl 21 surely contacts the rear end of the printed wiring board 10 during such deceleration.

As shown in FIG. 3, the printed wiring board 10 is provided.
When the frictional force between the conveyor rail 35 and the conveyor rail 35 is F _f and the mass of the printed wiring board 10 is m, the frictional force F is
_The virtual acceleration A _f caused by _f is expressed by the following equation (1).

[0036]

## EQU1 ## A _f = -F _f / m

Since the feed pawl 21 is always in contact with the rear end of the printed wiring board 10 during deceleration, A _f ≤A ₁ must be satisfied. That is,

[0038]

## EQU2 ## −A _f = F _f / m ≧ v ₁ / (t ₃ −t ₂ ) = − A ₁

Thus, the maximum absolute value of the acceleration A ₁ = -v ₁ / (t ₃ -t ₂ ) of the feed claw 21 during deceleration is F _f / m. Acceleration A of feed claw 21 during deceleration
_In order to increase the absolute value of ₁ = −v ₁ / (t ₃ −t ₂ ), the absolute value of acceleration A _f = −F _f / m, that is, the frictional force F _f
It is better to increase the value of.

FIG. 5 shows an example of an apparatus for increasing the frictional force F _f between the printed wiring board 10 and the conveyor rail 35. In this example, a suitable roller 37 that engages with the printed wiring board 10 is arranged on the upper surface of the printed wiring board 10, and a weight 39 is suspended from the roller 37. When the printed wiring board 10 moves, the roller 37 rotates accordingly, and the weight 39 exerts a force on the printed wiring board 10, thereby increasing the frictional force F _f .

FIG. 6 shows an example of the printed wiring board positioning unit 13. The printed wiring board positioning unit 13 has two conveyor rails 35A and 35B that sandwich the printed wiring board 10 from both sides of the upper surface and the lower surface,
The printed wiring board 10 that is moved by the feed claws 21 moves while being sandwiched between the two sets of conveyor rails 35A and 35B. The upper conveyor rail 35A is fixed and the lower conveyor rail 35A is biased upward by a suitable resilient device, eg, spring 41.

Printed wiring board 10 and conveyor rail 3
The contact surface 5 is in contact with the contact surface 5 and the biasing force of the spring 41 acts on these contact surfaces, whereby the frictional force F _f is increased.

Thus, in this example, the printed wiring board 10
Printed wiring board 1 by controlling the frictional force of
The moving speed of 0, especially the moving speed during deceleration is controlled, and therefore the printed wiring board 10 does not separate from the feed claw 21 during deceleration. While the printed wiring board 10 is moving, the feed claw 21 is always and surely in contact with the rear end of the printed wiring board 10. Therefore, the moving speed of the printed wiring board 10 should be controlled by the moving speed of the feed claw 21. Can be controlled to an appropriate value.

7 and 8 show another example of the printed wiring board positioning unit 13. In this example, the lower conveyor rail 35B is spring 4 so that the lower conveyor rail 35B is pressed against the upper conveyor rail 35A.
It is urged by 1 toward the upper conveyor rail 35A. The printed wiring board 10 is configured to be sandwiched between the upper conveyor rail 35A and the lower conveyor rail 35B, and the printed wiring board 10 is urged against the upper conveyor rail 35A by the biasing force of the spring 41. It is pressed.

As shown in FIG. 8, a pin 4 passing through the upper conveyor rail 35A and the lower conveyor rail 35B.
9 is arranged, and the linear bush 47 and the spring 41 are attached along the pin 49. An adjusting screw 49A that engages with the pin 49 is attached,
By loosening the adjusting screw 49A, the position of the pin 49 can be adjusted, whereby the biasing force of the spring 41 can be adjusted.

The operation of the printed wiring board positioning unit 13 of this example will be described with reference to FIG. Notches 35a and 35b are provided at the rear ends of the upper conveyor rail 35A and the lower conveyor rail 35B, and the notches 35a and 35b form a wedge-shaped gap. When the feed lever 29 moves forward, the printed wiring board 10 is inserted into such a wedge-shaped gap, and further, the upper conveyor rail 35A and the lower conveyor rail 35.
Go forward between B.

The printed wiring board 10 is decelerated by frictional force and stops at a desired position between the upper conveyor rail 35A and the lower conveyor rail 35B. Therefore, the printed wiring board 10 can be controlled by controlling the frictional force.
Stops exactly at the desired position. Printed wiring board 10
The frictional force acting on the printed wiring board 10 depends on the friction coefficient between the printed wiring board 10 and the conveyor rails 35A and 35B and the pressing force of the printed wiring board 10 against the conveyor rails 35A and 35B.

Printed wiring board 10 and conveyor rail 3
To increase the coefficient of friction between 5A and 35B,
For example, rubber may be attached to the surfaces of the conveyor rails 35A and 35B, or unevenness may be provided. Also, conveyor rail 35
Fine holes for vacuum adsorption may be provided on the surfaces of A and 35B to change the friction coefficient by vacuum suction from the fine holes. Further, the friction coefficient may be changed by blowing air from the pores on the surfaces of the conveyor rails 35A and 35B.

The pressing force of the printed wiring board 10 against the conveyor rails 35A and 35B is changed by the urging force of the spring 41. In addition to the biasing force of the spring 41, another biasing force may be applied to increase the pressing force. For example, a weight may be placed on the upper conveyor rail 35A, or the upper and lower conveyor rails 35A.
A and 35B may be configured to be pressed by air pressure toward the printed wiring board 10.

Next, an example of the overload detection device used in this example will be described with reference to FIG. The feed pawl 21 is configured to be driven by a suitable drive device such as an air cylinder 51. In the example shown in FIG. 10A, the feed claw 21 is configured to rotate around the rotation axis 53 when the air cylinder 51 operates, and in the example shown in FIG. 10B, the feed claw 21 follows the guide 55 when the air cylinder 51 operates. It is configured to move linearly.

A suitable sensor 57 is attached to the air cylinder 51, and the position of the piston of the air cylinder 51 is detected by the sensor 57. The sensor 57 also has the function of a sensor normally provided for confirming the return of the piston of the air cylinder 51.

When the printed wiring board 10 is moving at a constant speed, the position of the piston of the air cylinder 51 is at a constant position. However, when the printed wiring board 10 comes into contact with an obstacle and cannot move further forward, the piston of the air cylinder 51 moves. In this case, the moving direction of the piston is the backward direction of the feed claw 21.

In this way, when the piston of the air cylinder 51 moves, it is detected by the sensor 57, the movement of the conveyance moving portion 19 (see FIG. 12) of the printed wiring board conveying device 17 is stopped, and the feed claw attached to it is stopped. 21 stops. According to this example, since the overload detection device is provided, it is possible to prevent the feed claw 21, the printed wiring board transfer device 17, and the like from being damaged when the printed wiring board 10 contacts an obstacle.

FIG. 11 shows an example of a driving device for the feed claws 21 used in the printed wiring board carrying device of this embodiment. Such a drive may be configured to include, for example, an air cylinder 59. The feed claw 21 is rotatably supported around the rotary shaft 61, one end of which is configured to engage with the printed wiring board 10 and the other end of which is connected to the air cylinder 59. When the air cylinder 59 operates and the piston extends, the feed claw 21 rotates around the rotation shaft 61. By operating the air cylinder 59 in this manner, the feed claw 21 is moved to the transport position where it engages with the printed wiring board 10 and the standby position where it is retracted with respect to the printed wiring board 10 (see FIG. 11).
(Indicated by a broken line in the figure).

Although the embodiments of the present invention have been described above in detail, those skilled in the art will understand that the present invention is not limited to the above-mentioned embodiments and various other configurations can be adopted without departing from the gist of the present invention. Easy to understand.

[0056]

The printed wiring board transfer device 17 of the present invention.
According to this, since there is only one feed claw 21, there is an advantage that the structure is simple and the cost of the printed wiring board transfer device and the mounting machine including the same can be reduced.

According to the printed wiring board transfer device 17 of the present invention, since the number of the feed claws 21 is only one, the feed claws 2 can be used even if the size and shape of the printed wiring board to be transferred are different.
Therefore, there is an advantage that the step of mounting printed wiring boards having different sizes and shapes can be automated.

According to the printed wiring board carrying device 17 of the present invention, the moving speed of the printed wiring board can be controlled to an appropriate value and the stop position of the printed wiring board can be accurately controlled. There is an advantage that damage of each part of 17 can be reduced and the life can be increased.

According to the printed wiring board transfer device 17 of the present invention, since the overload detection device is mounted, damages to the printed wiring board, the feed claws 21 and the respective parts of the printed wiring board transfer device 17 are reduced and the service life thereof is reduced. There is an advantage that can be increased.

According to the printed wiring board transfer device 17 of the present invention, the overload detection device has the sensor 57, and the sensor 57 has a function of a sensor which is usually provided in the air cylinder and confirms the return of the piston. Therefore, there is an advantage that the cost of the printed wiring board transfer device 17 and the mounting machine including the same can be reduced.

According to the printed wiring board positioning apparatus of the present invention, since the stop position of the printed wiring board 10 is controlled by the frictional force, there is an advantage that the printed wiring board 10 can be stopped at an accurate position.

According to the printed wiring board positioning apparatus of the present invention, since the stop position of the printed wiring board 10 is controlled by the frictional force, the printed wiring board 10 can be stopped at an accurate position without requiring a complicated mechanism. There is an advantage that can be.

[Brief description of drawings]

FIG. 1 is a diagram showing an operation of a feed claw of a printed wiring board transport device of the present invention.

FIG. 2 is an explanatory diagram illustrating an example of a stop device for a printed wiring board.

FIG. 3 is an explanatory diagram illustrating a force acting on a printed wiring board.

FIG. 4 is an explanatory diagram showing a moving speed of a printed wiring board.

FIG. 5 is an explanatory diagram showing an example of a device for increasing frictional force.

FIG. 6 is an explanatory diagram showing a first example of a printed wiring board positioning unit.

FIG. 7 is an explanatory diagram showing a second example of the printed wiring board positioning unit.

FIG. 8 is an explanatory diagram showing a second example of a printed wiring board positioning unit.

FIG. 9 is an explanatory diagram showing an operation of a second example of the printed wiring board positioning unit.

FIG. 10 is an explanatory diagram showing an example of an overload detection device.

FIG. 11 is a diagram showing an example of a drive device for a feed pawl.

FIG. 12 is a diagram showing an example of a conventional printed wiring board replacement device.

FIG. 13 is a diagram showing an example of a conventional printed wiring board positioning unit.

FIG. 14 is an explanatory diagram illustrating an operation of a conventional printed wiring board transfer device.

FIG. 15 shows a conventional printed wiring board transfer device,
It is explanatory drawing explaining the relationship between the dimension and shape of a printed wiring board, and a feed claw.

[Explanation of symbols]

 10, 10A, 10B Printed wiring board 11 Loading unit 13 Printed wiring board positioning unit 15 Unloading unit 17 Printed wiring board transfer device 19 Transfer moving part 21 Feeding claw 25 Outgoing end confirmation sensor 27 Hole 29 Feeding claw 29-1 Rear side 29-2 Front Side 31 Conveyor Belt 35, 35A, 35B Conveyor Rail 35a, 35B Notch 37 Roller 39 Weight 41 Spring 43 Rail Width Adjuster 45 XY Table 47 Linear Bushing 49 Pin 49A Adjusting Screw 51 Air Cylinder 53 Rotating Shaft 55 Guide 57 sensor 59 air cylinder 61 rotating shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Wada 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (6)

[Claims] 1. A printed wiring board carrying device for carrying a printed wiring board to a predetermined position, wherein the printed wiring board carrying device is capable of engaging with a rear end of the printed wiring board and moving along the carrying direction of the printed wiring board. A printed wiring board transporting device having one feed claw capable of moving the printed wiring board by the feed claw. 2. The printed wiring board transfer device according to claim 1, wherein the stop position of the printed wiring board is controlled by a frictional force. 3. The printed wiring board transfer device according to claim 1, further comprising an overload detection device,
The overload detection device is configured to detect that an obstacle is encountered while the printed wiring board is being moved by the feed claws. 4. A printed wiring board positioning device for supporting a printed wiring board having an upper guide rail and a lower guide rail and carried between the upper guide rail and the lower guide rail. A printed wiring board positioning device, wherein a stop position of the printed wiring board is controlled by a frictional force between the printed wiring board and the upper guide rail and the lower guide rail. 5. The printed wiring board positioning device according to claim 4, wherein the frictional force is controlled by an urging force of a spring mounted on the upper guide rail or the lower guide rail. And printed wiring board positioning device. 6. The printed wiring board positioning device according to claim 5, wherein the upper guide rail and the lower guide rail are connected by a pin, and the lower guide rail is the upper guide by a spring arranged along the pin. A printed wiring board positioning device, wherein the lower guide rail is biased in a rail direction and is slidably supported by a linear bush disposed along the pin.