JPH0715176A - Adjusting device for transfer section of mounting machine - Google Patents

Abstract

PURPOSE:To suitably transfer printed substrates having a plurality of sizes and, at the same time, to appropriately maintain the interval between a component supplying unit and the transferred printed boards regardless of the size of the boards. CONSTITUTION:A pair of fixed rods 20 which are elongated in parallel in the direction perpendicular to the transfer direction of printed boards 3 are provided on a pedestal 1 and board transferring conveyors 2a and 2b are mounted on the rod 20 in slidable states. At the same time, component supplying section 4a and 4b are mounted on the rods 20 in a slidable and fixable states. Then they are constituted so that the component supplying sections 4a and 4b can be fixed at arbitrary positions after moving the conveyors 2a and 2b along the rods 20 while the conveyors 2a and 2b are brought nearer to and separated farther from each other by rotating a ball screw shaft 22 by operating a handle 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed so that an electronic component such as a chip component supplied from a component supply unit is adsorbed by a nozzle member and mounted on a printed circuit board conveyed by a board conveying conveyor. The present invention relates to a transfer unit adjusting device of a mounting machine that enables position adjustment of a board transfer conveyor and a component supply unit with respect to the printed circuit board according to the size of the printed circuit board.

[0002]

2. Description of the Related Art Conventionally, a nozzle member for adsorbing chip components provided on a head unit movably mounted on a base is used to feed a component from a component feeder unit such as a tape feeder.
After the chip components such as C are adsorbed, the head unit is moved to mount the chip components on the printed circuit board which is transported by the substrate transport conveyor and stopped at a predetermined work position. The machine is known.

In the mounting machine as described above, the board conveying conveyor generally has a pair of structures consisting of two rows of conveyors, which are arranged on the base at a predetermined interval.
At this time, the arrangement interval of each conveyor is set so that the end portion of the printed circuit board to be conveyed is supported by the belt member of the conveyor according to the size of the printed circuit board, and is conveyed by the circular movement of this belt member. There is.

On the other hand, the above-mentioned component supply unit is arranged outside each of these conveyors, and supplies chip components toward the board conveying conveyor.

Recently, depending on the size of the printed circuit board, a device that can bring one of the substrate carrying conveyors closer to the other, or a device that allows the respective conveyors to move in a direction toward each other, etc. Has been proposed, and in such an apparatus, printed circuit boards of a plurality of sizes can be carried by the same board carrying conveyor.

[0006]

However, in any of the above-mentioned devices in which the conveyor is movably equipped, the component supply unit is fixed on the base, and therefore, depending on the size of the printed circuit board. However, there is a problem in that the moving time of the head unit that reciprocates between the component supply unit and the printed circuit board is lost when the chip components are mounted.

That is, in the above apparatus, if the conveyors and the component supply unit are close to each other with the pair of conveyors having an interval corresponding to a certain size printed circuit board, the printed circuit board becomes large. Increasing the conveyor spacing accordingly is not possible because it causes interference with the component supply unit. Therefore, it is necessary to set the arrangement position of the component supply unit assuming the maximum size printed circuit board in advance, but if this is done, the interval between the conveyors is increased in order to mount the chip component on the extremely small size printed circuit board. If it is narrowed, the distance between the component supply unit and the printed circuit board is increased, and as a result, it is necessary to waste time for moving the head unit back and forth between the component supply unit and the printed circuit board during mounting.

Therefore, in the above-mentioned conventional apparatus, when a continuous mounting operation is performed on an extremely small size printed circuit board, the loss of the moving time of the head unit is accumulated,
Increase, which leads to a decrease in mounting efficiency. Further, when mounting operations are performed on printed boards of a plurality of sizes, it is necessary to consider the moving time of the head unit for each size, and the work for estimating the production plan is complicated.

The present invention has been made in order to solve the above problems, and preferably conveys a plurality of sizes of printed circuit boards, and the component supply unit and the conveyed printed circuit board are not affected by the sizes of the printed circuit boards. It is an object of the present invention to provide a transfer section adjusting device for a mounting machine, which is capable of maintaining an appropriate interval between the and.

[0010]

DISCLOSURE OF THE INVENTION The present invention is directed to a pair of board conveying conveyors arranged in parallel with each other at a predetermined interval on a base and extending in the conveying direction of a printed circuit board, and these board conveying conveyors. In a mounting machine provided with a component supply unit arranged to supply electronic components, the pair of substrate transfer conveyors are brought into contact with or separated from each other in a direction orthogonal to a printed circuit board transfer direction. In addition to being movably mounted, each of the component supply units is provided so as to be movable along a guide member in a direction orthogonal to the printed circuit board transport direction and to be fixed at an arbitrary position. ).

Further, each of the component supply units is connected to a substrate transfer conveyor located inside thereof, and the substrate transfer conveyor and the component supply unit connected thereto are integrally moved toward and away from each other. A moving mechanism is provided (Claim 2).

[0012]

According to the present invention, when the distance between the pair of board conveying conveyors is changed in accordance with the change in the size of the printed circuit board, the arrangement of the component supply units is adjusted accordingly, and It is possible to avoid interference with the component supply unit and to set the component supply unit at a position close to the board conveying conveyor (claim 1).

In particular, when a pair of board conveying conveyors and respective component supply units arranged on the outer sides thereof are connected to each other, one board conveying conveyor and the component supply unit connected thereto and the other. The board conveying conveyor and the component supply unit connected to the board conveying unit can be integrally moved toward and away from each other along the guide member. It becomes possible to keep the interval constant (claim 2).

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings.

1 and 2 show the structure of the entire mounting machine to which the carrying section adjusting device of the present invention is applied. In these figures, a head unit 5 for mounting components is installed above the base 1, and the head unit 5 is mounted in the X-axis direction (left-right direction in FIG. 1) and in the Y-axis direction (X-axis on a horizontal plane). It is possible to move in the orthogonal direction).

That is, a pair of fixed rails 7 extending in the Y-axis direction and a ball screw shaft 8 rotatably driven by a Y-axis servomotor 9 are arranged on the base 1, and the fixed rails 7 are mounted on the fixed rail 7. A head unit support member 11 is arranged in the head unit, and a nut portion 12 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 5 can be moved on the guide member 13. A nut portion (not shown) that is held and provided on the head unit 5 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. 5 moves in the X-axis direction with respect to the support member 11.

The head unit 5 is provided with a nozzle member 16 for attracting chip components, and in the illustrated embodiment, it is 8
One nozzle member 16 is provided. Each nozzle member 1
6 is capable of ascending / descending (movement in the Z-axis direction) and rotating around the nozzle center axis (R-axis) with respect to the frame of the head unit 5, respectively, by a Z-axis servo motor and an R-axis servo motor (not shown). It is designed to be activated.

Further, a negative pressure from a negative pressure generating source (not shown) is supplied to each of the nozzle members 16 through a valve member or the like. At the time of mounting, the supplied negative pressure is applied to the nozzles. It acts on the tip of the member to adsorb the chip component.

On the other hand, below the head unit 5,
A board transfer conveyor 2 and component supply parts 4a and 4b, which constitute a transfer part adjusting device, which is a feature of the present invention, are provided.

The substrate carrying conveyor 2 comprises a pair of conveyors 2a and 2b extending in the X-axis direction and parallel to each other.
These conveyors 2a and 2b can be brought into and out of contact with each other. That is, a pair of fixed rods 20 extending in the Y-axis direction and parallel to each other and a ball screw shaft 22 rotatably driven by the operation of the handle 21 are arranged on the base 1. The base plates 30a and 30b of the conveyors 2a and 2b are slidably inserted through bearings such as bushes or bearings, and are attached to the nut members 31a and 31b fixed to the base plates 30a and 30b. The ball screw shaft 22 is screwed. The nut members 31a and 31b are engraved with screws in directions opposite to each other, and the ball screw shaft 22 has a portion screwed into the nut member 31a and a portion screwed into the nut member 31b in opposite directions. Thus, by rotating the handle 21, the conveyor 2
a and 2b move along the fixed rod 20 in the direction away from each other (direction of arrow 23a in FIG. 1), while the handle 2
1 is reversely rotated, so that the conveyors 2a, 2
b are moved in a direction in which they approach each other (direction of arrow 23b in FIG. 1).

Further, as shown in FIG. 4, the base plates 30a, 30b of the conveyors 2a, 2b have shafts 33a, 3 which are rotatable with respect to the base plates 30a, 30b, respectively.
3b is provided, and drive pulleys 32a and 32b are externally fitted to the shaft bodies 33a and 33b, respectively. A drive shaft 25, which is rotatably supported on the base 1 and extends in the Y-axis direction, is inserted into the shaft bodies 33a and 33b, and the drive shaft 25 is rotated by the drive motor 24. It is supposed to be done. The shaft 33
The a and 33b and the drive shaft 25 are spline-coupled so that only relative movement of the shaft bodies 33a and 33b with respect to the drive shaft 25 in the axial direction is allowed.

As shown in FIG. 3, conveyor belts 40a and 40b for conveying printed circuit boards are mounted on the drive pulleys 32a and 32b, respectively, and the conveyor belts 40a and 40b are respectively connected to the base plates 30a. , 30b
Is rotatably supported by the pulleys 34a to 39a and 34b to 39b, respectively. By the way, among the pulleys around which the conveyor belts 40a and 40b are wound, the pulleys 34a, 35a and 34b, 35b provided near the left end portion (shown in FIG. 3) are
The base plates 30a and 30b are axially supported by line extending members 41a and 41b provided at the same ends of the base plates 30a and 30b. Moreover, as shown in the figure, the pulleys 35a, 35b are moved in the right direction with respect to the pulleys 34a, 34b pivotally supported at the leftmost end so that the conveyor belts 40a, 40b are folded back. Each line extending member 41 in the state of being offset to
It is pivotally supported by a and 41b. The line extending members 41a and 41b are slidably mounted on rail members (not shown) mounted on the base plates 30a and 30b, and the air cylinders 42a mounted on the base plates 30a and 30b. , 42b rods with joints 43a, 43b
Are connected via.

In each of the conveyors 2a and 2b, the drive motor 24 is driven, so that the rotational drive force of the drive motor 24 is transmitted via the drive shaft 25 to the drive pulleys 32.
a, 32b, by which the above conveyors 2
The conveyor belts 40a and 40b of a and 2b are rotated. Further, the line extending members 41a, 41b are moved from the position indicated by the solid line in FIG. 3 to the position indicated by the alternate long and short dash line with respect to the base plates 30a, 30b in accordance with the supply and discharge of the air pressure to the air cylinders 42a, 42b. And the pulleys 34a, 35 are moved along with the movement of the line extending members 41a, 41b.
By moving b and 34b, 35b integrally, as shown in FIG. 3, the distance between the pulley 34a (34b) and the pulley 39a (39b), that is, each conveyor belt 4
The transport distance for the printed circuit board is substantially extended by 0a and 40b.

On the other hand, on the side of the substrate carrying conveyor 2,
More specifically, the outside of each conveyor 2a, 2b (see FIG.
Then, the component supply units 4a and 4b are disposed in the vertical direction). These component supply units 4a and 4b include a plurality of rows of tape feeders 51a and 51b and a feeder support unit 52a that supports these tape feeders 51a and 51b.
And 52b. Each tape feeder 5 above
Each of the supply tapes 1a and 51b is provided with a supply tape wound around a reel, and each supply tape accommodates chip-like chip parts such as ICs, transistors, and capacitors at predetermined intervals. Then, the feeding mechanism is adapted to intermittently feed the supply tape as the chip parts are fed.

The feeder supporting portions 52a and 52b are slidably mounted on the fixed rod 20, and can be fixed at arbitrary positions by a fixing means 55 as shown in FIG. 5, for example. ing. That is, the feeder support parts 52a and 52b have a shape in which the lower part through which the fixed rod 20 is inserted can be expanded and contracted,
Moreover, the bolt 56 is screwed to this portion, and when the bolt 56 is loosened, it can slide with respect to the fixed rod 20,
When the bolt 56 is tightened, it is fixed to the fixed rod 20.

When the mounting operation is started in the mounting machine configured as described above, first, the drive motor 24 is driven to drive the respective conveyor belts 40 of the substrate conveyor 2.
Both a and 40b are rotationally moved. Along with this, the printed circuit board 3 is transferred from the circuit board supply unit (not shown) to the circuit board conveyor 2
The printed circuit board 3 is set at a predetermined work position, for example, the position shown by the chain double-dashed line in FIG. 1, by being driven along with and being stopped at a predetermined timing.

Next, by driving the X-axis servo motor 15 and the Y-axis servo motor 9, the head unit 5 is moved above the component supply unit 4a (or 4b), and the R-axis servo motor and the Z-axis servo motor are driven. The nozzle member 16 which should pick up the component is lowered by the drive of
A desired chip component is adsorbed and raised from the tape feeder 51a (or 51b). After that, by driving the servo motors 9 and 15 again, the head unit 5 is moved to the arrangement position of the component inspection device (not shown) on the base 1, and the chip components adsorbed here are picked up. Predetermined inspection is performed on. Then, when this inspection is completed, the head unit 5 is moved onto the printed circuit board 3, and the nozzle member 16 that has adsorbed the chip component is lowered to mount the chip component at a predetermined component mounting position on the printed circuit board 3. Will be done.

By the way, in the above mounting machine, it is possible to mount the chip components even on the printed circuit boards of different sizes. For example, the printed circuit board 3 shown in FIG.
In the case of mounting a chip component on a printed circuit board whose width (width in the Y-axis direction) is narrower than that, the board conveying conveyor 2
The interval between the conveyors 2a and 2b may be set narrow according to the printed circuit board. At this time, by rotating the handle 21, the conveyors 2a and 2b are moved along the fixed rod 20 in the directions of approaching each other as described above, so that it is easy to change the distance between the conveyors 2a and 2b. It can be carried out. Further, in this case, each component supply unit 4a, 4b may also be moved inward along the fixed rod 20, set at a position close to each conveyor 2a, 2b, and then fixed.

On the other hand, when a chip component is mounted on a printed circuit board having a width wider than that of the printed circuit board 3 shown in FIG. 1, the handle 21 is rotated in the opposite direction to each conveyor 2a, 2b. Can be moved away from each other. Also, at this time, the conveyors 2a, 2
Prior to the movement of b, the component supply units 4a and 4b may be moved outward.

As described above, in the mounting machine, the distance between the conveyors 2a and 2b of the board conveying conveyor 2 can be easily expanded / contracted by rotating the handle 21, so that it is suitable regardless of the size of the printed board. Moreover, the mounting work of the chip component on the printed circuit board can be performed. Moreover, in the above mounting machine, each component supply unit 4
It is possible to efficiently move the head unit 5 that reciprocates between a and 4b and the printed circuit board. That is,
In the mounting machine that fixed the component supply unit on the base and adjusted only the intervals of each conveyor of the board transport conveyor to support multiple sizes of printed boards as in the past, the largest size printed board In the case of mounting on the printed circuit board, the head unit is moved in a relatively short time because the distance between the board conveying conveyor and the component supply unit is narrowed, but the mounting is performed on the minimum size printed circuit board. In this case, the distance between the board conveying conveyor and the component supply unit becomes large, and it takes a wasteful time to move the head unit. Therefore, if the mounting work of the chip parts on the small size printed circuit board is continuously performed, the production efficiency is deteriorated, and if the chip parts are mounted on the printed circuit boards of multiple sizes, the production plan is required. This leads to the inconvenience that the estimation work is complicated.

On the other hand, in the above mounting machine, since the component supply units 4a and 4b are movable in accordance with the movement of the conveyors 2a and 2b as described above, the printed circuit boards of different sizes can be used. Even when mounting work is performed, the distance between the component supply units 4a and 4b and the board transporting conveyor 2 can be kept small, and the above-described reciprocating movement of the head unit 5 is the minimum necessary for any size printed circuit board. It can be done in a limited time. Therefore, it is possible to effectively avoid the disadvantages of the conventional device.

Further, in the above mounting machine, the line extending members 41a, 41b are moved from the position shown by the solid line in FIG. 3 to the position shown by the alternate long and short dash line with respect to the base plates 30a, 30b. Since the substantial transport distance of the substrate transport conveyor 2 is extended, the transport distance of the printed circuit board in the mounting machine can be appropriately adjusted according to the layout in which the mounting machine is installed. There is also an advantage. Moreover, the movement of the line extending members 41a, 41b with respect to the base side plates 30a, 30b is performed in accordance with the supply and discharge of air pressure to the air cylinders 42a, 42b provided in the machine side plates 30a, 30b. It is possible to adjust the transport distance of the substrate transport conveyor 2 very easily.

In the above embodiment, each conveyor 2a,
2b and the component supply units 4a and 4b are individually movable, but as shown in FIG. 6, the component supply units 4a and 4b are movable.
May be movable integrally with each of the conveyors 2a and 2b. That is, in this embodiment, as shown in the figure, the feeder support portions 52a and 52b are connected to the base side plates 30a and 30b of the substrate transporting conveyor 2 from outside (left and right direction in FIG. 6) via the collar 53. Has been done. And
By rotating the handle 21, the conveyors 2
When a and 2b are moved toward and away from each other, the component supply parts 4a and 4b are moved along the fixed rod 20 integrally with the conveyors 2a and 2b.

According to this embodiment, it is possible to move the respective component supply parts 4a and 4b together with the respective conveyors 2a and 2b simply by operating the handle 21, and the respective conveyors 2a and 2b can be moved.
It is possible to reliably keep the distance between a and 2b and the component supply units 4a and 4b constant.

Further, since the respective component supply parts 4a and 4b and the respective conveyors 2a and 2b are connected through the collar 53, the size of the collar 53 can be appropriately changed so that the respective component supply parts 4a and 4b are connected. There is an advantage that the distance between each of the conveyors 2a and 2b can be adjusted.
For example, by connecting the component supply units 4a and 4b and the conveyors 2a and 2b with a relatively small-sized collar, the interval between them is set to be extremely narrow, thereby minimizing the reciprocating time of the head unit 5. In addition, the component supply sections 4a, 4b and the conveyors 2a, 2b are connected to each other by a collar having a relatively large size, and an interval between them is set relatively wide, and thus the components are formed. Each component supply unit 4a, 4b and each conveyor 2a,
It is also possible to dispose a chip component inspection device or the like in a gap with the 2b and move the inspection device or the like integrally with the conveyors 2a and 2b and the component supply units 4a and 4b.

The mounting machine described above is a mounting machine to which an embodiment of the transport section adjusting device of the present invention is applied, and various modifications can be made in addition to the above embodiments. For example,
In the above embodiment, each of the conveyors 2a and 2b and the component supply units 4a and 4b are configured to be moved along the fixed rod 20, but rails are provided on the base 1.
The conveyors 2a, 2b and the component supply units 4a, 4b may be arranged on this rail, and the conveyors 2a, 2b and the component supply units 4a, 4b may be configured to move along the rails.

In the above embodiment, each conveyor 2a,
Bearings 31a and 31b in which screws in opposite directions are engraved are provided on the base plates 30a and 30b of 2b, and a ball screw shaft 22 is screwed into the bearings 31a and 31b, and the conveyors 2a and 2b are contacted and separated by rotating the handle 21. Although it is configured to move, for example, the ball screw shaft 22 is rotated by a drive motor or the like, and a rotation amount detection means and a control device for controlling these are provided to automatically move according to the size of the printed circuit board. The interval between the conveyors 2a and 2b may be adjusted, or an air cylinder or the like may be arranged between the conveyors 2a and 2b, and the conveyors 2a and 2b may be connected according to the supply and discharge of air pressure to and from the air cylinders. It may be configured to move toward and away from each other.

[0038]

As described above, according to the present invention, a pair of substrate carrying conveyors can be brought into and out of contact with each other, and the respective component supply units arranged on the outer sides of the conveyors are slidable on the guide members. Since it is mounted on the board and can be fixed at any position, it is possible to respond to the size change of the printed circuit board, and for any size printed circuit board, the component supply unit and the printed circuit board to be transported. It is possible to maintain the appropriate interval, and it is possible to reduce the loss of the moving time of the head unit and improve the processing capacity.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a mounting machine to which an example of a conveyance unit adjustment device according to the present invention is applied.

FIG. 2 is a schematic front view of the mounting machine.

FIG. 3 is a view on arrow A in FIG. 1 showing one side of the board conveying conveyor.

FIG. 4 is a sectional view taken along line I-I in FIG.

FIG. 5 is a view as seen from the direction of arrow B in FIG. 4, showing a mounting portion of the feeder support portion with respect to the fixed rod.

FIG. 6 is a schematic cross-sectional view showing another embodiment of the conveyance section adjusting device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 base 2 board conveyance conveyors 2a, 2b conveyor 3 printed boards 4a, 4b component supply section 5 head unit 16 nozzle member 20 fixed rod 21 handle 22 ball screw shafts 30a, 30b base side plate 53 color

Claims (2)

[Claims] 1. A pair of board-conveying conveyors arranged in parallel with each other at a predetermined interval on a base and extending in a conveyance direction of a printed circuit board, and arranged on the outer side of each of these board-conveying conveyors. In a mounting machine provided with a component supply unit adapted to supply electronic components, the pair of substrate transfer conveyors are mounted so as to be movable toward and away from each other in a direction orthogonal to a printed circuit board transfer direction, and A transport section adjusting device for a mounting machine, wherein each component supply unit is provided so as to be movable along a guide member in a direction orthogonal to a printed circuit board transport direction and fixed at an arbitrary position. 2. Each of the component supply units is connected to a substrate transfer conveyor located inside thereof, and each of the substrate transfer conveyors and the component supply unit connected to these are integrally moved toward and away from each other. The transfer section adjusting device for a mounting machine according to claim 1, further comprising a moving mechanism.