JPS6356972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for printing a pattern on a printed circuit board, and more specifically, the present invention relates to an apparatus for printing a pattern on a printed circuit board, and more specifically, for assembling the printed circuit board on an exposure stage and printing the printed circuit board on a pattern film. When aligning with
The purpose of this is to prevent damage to the pattern film that is used in reverse semi-permanently.

Another object is to easily achieve precisely positioned mounting of the printed circuit board to the exposure stage.

Another object of the present invention is to efficiently transport printed circuit boards from lamination to completion of baking.

[Conventional technology]

To print a pattern on a printed circuit board, a photosensitive material is attached to the printed circuit board, and after the photosensitive material and the printed circuit board have been cooled, the printed circuit board is brought into surface contact with a pattern film mounted on a photosensitive stage, and printing is performed. There is.

Now, an important issue regarding printing of printed circuit boards is how to accurately align the pattern film and the printed circuit board to bring them into surface contact.

To align the pattern film and the printed circuit board, place the pattern film in advance on the horizontally arranged glass surface of the exposure stage.
The printed circuit board is aligned and overlaid on this pattern film using reference pins provided on the exposure stage, and then the final Measures are taken to fine-tune and move the printed circuit board to achieve accurate alignment.

[Problem that the invention seeks to solve]

During this fine adjustment of the printed circuit board, the pattern film is easily scratched by the hard glass surface of the exposure stage and the sliding movement of the heavy printed circuit board for fine adjustment, and these scratches can be a serious obstacle to pattern printing. I was getting used to it.

Also, when aligning the pattern film and printed circuit board on the glass surface of the exposure stage,
As mentioned above, alignment is achieved by making fine adjustments using alignment holes drilled in the printed circuit board and alignment marks printed on the pattern film. It is necessary to work by looking into the alignment hole from a direction perpendicular to the printed circuit board, which inevitably leads to an unnatural posture for the worker, which can lead to fatigue, making it difficult to achieve accurate alignment over a long period of time. Tasks are becoming more difficult to accomplish.

Furthermore, printed circuit boards are 1000 mm square or 500 mm square.
It has a size of [mm] square and a large weight, but handling and moving a printed circuit board with this large surface area in a horizontal position requires a large surface area, so the use of space is extremely difficult. This resulted in poor efficiency and made handling of the printed circuit board extremely troublesome.

For this reason, in the past, especially in the case of double-sided printing, the lamination process, in which photosensitive material is attached to both sides of a printed circuit board, and the baking process were completely separated, and even during the printing process, one baking process and the other were completely separated. The baking process for the other side was separated, resulting in extremely poor work efficiency as a whole.

The present invention has been devised to solve the problems in the conventional example described above, and while the printed circuit board is held in an almost vertical position with the reference side facing upward, the printed circuit board is moved along an imaginary straight line parallel to the reference side. The pattern is printed on both sides while maintaining this almost vertical position, and the printed circuit board with photosensitive material pasted on both sides is positioned with its reference side at the bottom. By inverting the board and performing the printing process in an almost vertical position with the reference side at the top, it is possible to easily and accurately align the printed circuit board to the printing device. be.

[Means for solving problems]

The printing apparatus according to the present invention includes a positioning stage that incorporates and positions a printed circuit board with photosensitive material pasted on both sides with the reference side with the reference hole formed at the top; A first exposure stage that performs printing, an inversion stage that inverts the printed circuit board that has been exposed on one side on this first exposure stage, and a reversal stage that performs printing on the other side of the printed circuit board that has been inverted on this inversion stage. The stage surface of each stage is set at a constant inclination angle of -5° to +30° with respect to the vertical plane. At the same time, the reference pins, which fit into the reference holes at the upper end of each stage surface and suspend and hold the printed circuit board, are positioned on a single, imaginary straight line. The positioning stage is formed by a positioning panel, the first exposure stage is formed by a first exposure machine, the reversing stage is formed by a reversing device, and the second exposure stage is formed by a second exposure machine.

The reversing device is for reversing a printed circuit board whose one side has been printed on the first exposure stage.

The cross-feeding device includes a holding device that is placed above each stage and sucks and holds the printed circuit board that is assembled and held on the stage surface of each stage.
The movement is performed along the above-mentioned imaginary single plane, that is, along an imaginary extension straight line of the reference side of the printed circuit board held on the positioning stage.

In addition, there is a laminator that attaches photosensitive material to both sides of the printed circuit board while moving the printed circuit board in a horizontal position with the reference side positioned at the rear end facing the positioning stage. A board stocker belt receives and transports the printed circuit board with the reference side facing down by a transfer/reversing machine, holding it in an almost upright position, and the printed circuit board transported by this board stocker belt. A substrate reversing device on the carry-in side is provided for transferring and assembling the substrate onto the stage surface of the positioning stage.

[Effect]

When the printed circuit board is assembled to the positioning stage by inserting the reference pin into the reference hole, the printed circuit board is assembled to the positioning stage while being suspended by the reference pin, so that the reference hole is fixed by the action of gravity. The positional relationship with respect to the pins is constant, thereby achieving accurate assembly alignment of the printed circuit board to the printing device.

Once the printed circuit board has been assembled to the positioning stage, the lateral feed device is operated to move the holding device to a position in front of the printed circuit board held on the positioning stage, and the holding device is operated to position the printed circuit board. The printed circuit board on the stage is held by suction and pulled up from the surface of the positioning stage. Once the printed circuit board has been lifted up by the holding device, the holding device is moved to the front of the first exposure stage by the traversing device, and the held printed circuit board is assembled onto the first exposure stage by the reverse operation of the holding device. At this time, the printed circuit board set on the first exposure stage surface by the holding device is
Since the cross-feeding device moves along an imaginary straight line of the reference side of the printed circuit board held on the positioning stage, its reference hole is fitted with the reference pin of the first exposure stage, and At the same time as setting, alignment with respect to the first exposure machine is achieved.

On the first exposure stage, fine adjustments are made to accurately align the pattern film set in advance and the printed circuit board.The printed circuit board is placed on the first exposure stage with the printed circuit board suspended from the reference pins. Since the printed circuit board is held in place, the large weight of this printed circuit board does not act on the pattern film, and therefore fine adjustments of the printed circuit board can be achieved without damaging the pattern film, and the large weight of this printed circuit board can be achieved without damaging the pattern film. The printed circuit board is
Since the position is almost upright, the worker performing alignment work can perform alignment operations between the alignment holes on the printed circuit board and the alignment marks on the pattern film while looking straight ahead and in a natural posture. Therefore, this positioning operation becomes extremely easy to perform.

Once the printing in the first exposure stage is completed,
The printed circuit board on the first exposure stage is transferred to the reversing stage by the action of the traversing device and the holding device,
The printed circuit board is reversed by the reversing device of this reversing stage.

When the reversal of the printed circuit board on the reversing stage is completed, the printed circuit board on the reversing stage is transferred to the second exposure stage by the action of the cross-feeding device and the holding device, and the same operation as in the first exposure stage is performed. Once the other side of the printed circuit board has been printed, and the second exposure stage has completed the printing and the printing has been completed on both sides of the printed circuit board, the action of the lateral feed device and the holding device allows the printed circuit board to be printed. Take it out of the printing equipment.

In addition, when attaching photosensitive material to both sides of a printed circuit board using a laminator, in order to accurately drill the reference hole, the printed circuit board inserted into the laminator is placed horizontally with its reference side positioned at the rear. The position of the reference side is detected to determine the position of the hole corresponding to the reference hole in the laminator.

The printed circuit board with photosensitive material pasted on both sides by a laminator is fed as is to a transfer/reversal machine.
The substrate is reversed by this transfer/reversing machine to a position with the reference side in the front position, and is also supplied to the substrate stocker belt in an inclined position with the reference side in the lower position.

The board stocker belt can be used by inserting the reference side of the supplied printed circuit board.
This printed circuit board is transported while being held in an upright position with its reference side positioned at the bottom.In this way, each printed circuit board transported by the board stocker belt is held in an upright position with its reference side positioned at the bottom. As the PCBs are transported, their reference sides are aligned with the top surface of the belt, which is at a constant height, and as a result, the height positions of each printed circuit board on the board stocker belt are aligned with the reference sides as a reference. Become. In addition, the board stocker belt transports each printed circuit board that is supplied in a horizontal position in an upright position, so it can hold a large number of printed circuit boards and the transport speed can be sufficiently slowed down. This makes it possible to sufficiently cool a large number of printed circuit boards heated by the laminator.

The printed circuit board transported by the board stocker belt is held by suction by the board reversing device on the carry-in side placed in front of the positioning stage, and is reversed along the vertical plane by this board reversing device and then supplied to the positioning stage. will be attached. When assembling the printed circuit board onto the positioning stage using this board reversing device, the printed circuit board is at a constant height position with respect to its reference side by the board stocker belt, so the board reversing device By simply transferring the printed circuit board along a fixed transfer line, it is possible to assemble the printed circuit board while accurately positioning it with respect to the positioning stage.

〔Example〕

FIG. 1 is an overall plan view showing one embodiment of a printing device 1 according to the present invention, FIG. 2 is a front view of only the main body of the printing device 1, and FIG. 3 is a first embodiment of the printing device 1.
It is a side view seen from the right side in a figure.

In FIGS. 1 to 3, the printing device 1
The main body part includes, in order from the left side, a positioning panel 2 that constitutes a positioning stage A, a first exposure machine 3 that constitutes a first exposure stage B, an inversion device 40 that constitutes an inversion stage C, and a second exposure stage. A second exposure device 4 forming part D and a holding panel 5 forming discharge stage E are arranged. The belt 63 and the substrate reversing device 30 on the loading side are arranged so that the conveying direction of the printed circuit board K is perpendicular to the conveying direction in the main body of the printing device 1,
Further, in front of the ejection stage E, a board reversing device 30 on the unloading side is disposed, and the printed circuit boards transferred by the board reversing device 30 on the unloading side are transferred to an ejection belt 66 disposed below the ejecting stage E.
The liquid is supplied to the top and transported to a processing device outside the device by this discharge belt 66.

The board stocker belt 63 holds a number of stockers, which hold the printed circuit board K in an upright position by inserting the reference side K2 portion of the supplied printed circuit board K, onto the conveyor belt. It is configured so that its long side is perpendicular to the direction.

The positioning panel 2 constituting the positioning stage A is constituted by a simple flat plate, and has a hole at its upper end that is inserted into the reference hole K1 of the printed circuit board K to assemble the printed circuit board K to the positioning stage A. A reference pin P for holding and positioning the assembly is provided protrudingly.

The first exposure machine 3 that constitutes the first exposure stage B and the second exposure machine 4 that constitutes the second exposure stage D
is composed of a normal single-sided printing exposure machine, but a reference pin P is provided protruding from the upper end of the exposure stage surface, which is the exposure surface, and the reference hole K1 is fitted into this reference pin P. By doing so, the printed circuit board P can be positioned and assembled to the exposure stages B and D.

A film stocker 64 for storing a large number of films F is arranged in front of both exposure stages B and D, and a film take-out device 65 extracts a desired film F from the film stocker 64 according to a printing program. It is then taken out and automatically set on exposure stages B and D.

A reversing device 40 (see FIG. 7 below) constituting a reversing stage C located between both exposure stages B and D is attached to a fixed frame 41 in the shape of a right rectangle fixed to a fixed frame of the entire apparatus. A rotating frame 42 having a rectangular shape smaller than the fixed frame 41 but larger than the printed circuit board P is rotatably assembled by a pair of rotating shafts 43 provided at the center of both upper and lower sides of the rotating frame 42.
The printed circuit board P held in the position is turned over by half a rotation of the rotating frame 42.
The rotating frame 42 is rotated relative to the fixed frame 41 by a pinion 46 fixed to the motor shaft of a rotating motor 45 fixed on the rotating frame 42.
This is achieved by driving the rotary motor 45 by meshing with the rack teeth of a disc rack 44, which has rack teeth carved on the circumferential surface of a semicircular disc body fixed to the fixed frame 41. Further, the assembly and fixation of the printed circuit board P to the rotating frame 42 is achieved by a pair of chuck pieces 47 provided on the upper side of the rotating frame 42 and rotated to open and close about an opening/closing shaft 49 by driving of a chuck motor 48. . In FIG. 7, the holding plate 50 to which the holding roller 51 is attached holds the printed circuit board P held by the chuck piece 47 from the front and back with the holding roller 51, thereby stably holding the printed circuit board P by the chuck piece 47. A pair of vertical frame pieces are provided at the front and rear of the rotary frame 42 so as to be movable up and down between the vertical frame pieces. Further, the positioning lock 52 is connected to the rotating frame 42 which is rotated in the opposite direction with respect to the fixed frame 41 by the rotating motor 45.
is always stopped at a constant reversal rotation position.

The cross-feeding device 10 (see especially FIG. 4) includes a fixed frame 13 for mounting the cross-feeding device 10 on each stage, and a first feed section 11 with the same configuration that actually moves the holding device 20. and a second sending section 12. Both sending parts 11, 12
The movable frame 14 is slidably assembled via a sliding bearing 19 to a pair of guide rods 17 fixed to the fixed frame 13 via a bracket 18, and the base end is fixed to the fixed frame 13. cylinder rod 16
A drive cylinder 15 whose tip is fixed to the moving frame 14
The moving areas thereof overlap on the reversing stage C. Two holding devices 20 are attached to the front side of each moving frame 14, and the holding devices 20 attached to this moving frame 14 are attached at the same intervals as the fixed intervals of each stage, When one holding device 20 is positioned opposite to one stage, the other holding device 20 is positioned opposite to the adjacent stage.

Holding device 20 attached to the traversing device 10
(See especially FIG. 3) includes a mounting base 21 that serves as a part for assembling the traversing device 10 to the moving frame 14;
A suction cup block 23 is attached to the mounting base 21 via a link mechanism 22, and a suction cup is attached to the suction cup block 23 so as to be movable forward and backward, and sucks and holds the printed circuit board P held on each stage by vacuum action. It consists of 24. A drive mechanism for operating the link mechanism 22 is built into the mounting base 21, and the operation of the link mechanism 22 causes the suction cup block 23 to move toward and away from the stage surface while maintaining a constant attitude of the suction cup 24 relative to the stage surface. Performs a parallel movement.
Further, when the suction cup block 23 is positioned opposite to the stage surface due to the operation of this link mechanism 22, the suction cup 2 is moved by the drive mechanism inside the suction cup block 23.
4 moves forward to suck and hold the printed circuit board P held on the stage surface, and when it is confirmed that the printed circuit board P is sucked and held by the suction cup 24, the drive mechanism in the suction block 23 is activated to move the suction cup 24 The printed circuit board P is removed from the stage surface by the backward movement of the suction cup 24 that sucks and holds the printed circuit board P.

A board reversing device 30 on the carry-in side that supplies the printed circuit board P to the positioning stage A, and a board reversing device 30 on the carry-out side that carries out the printed circuit board P held on the discharge stage E after double-sided printing is completed onto the discharge belt 66 ( (see Figures 5 and 6) have exactly the same configuration, with a gate-shaped frame 3.
A base body 32, which is a main body part, is rotatably assembled via a rotation shaft 36 to a pair of elevating bodies 35 which are movably raised and lowered within both leg parts of the body. It is constructed by attaching a suction cup body 35 having a suction cup to the tip of an attached reciprocating rod 33. In the case of the board reversing device 30 on the carry-in side, the base body 32 descends to the lower limit with the suction cup 34 protruding rearward, sucks and holds the printed circuit board P on the board stocker belt 63, and temporarily remains in that position. After rising, the printed circuit board P is rotated 180 degrees to face the positioning stage A, and the advance/retraction rod 33 is advanced to move the printed circuit board P.
is set on positioning stage A. In the case of the substrate reversing device 30 on the unloading side, the base body 32 is placed in the state shown by the two-dot chain line in FIG.
is moved backward to remove the printed circuit board P from the ejection stage E surface, then the base body 32 is lowered and rotated to the position shown by the solid line, and the advance/retraction rod 33 is further advanced to remove the printed circuit board P held by suction.
is placed on the discharge belt 66 directly below.

〔Effect of the invention〕

As is clear from the above explanation, in the printing apparatus according to the present invention, both exposure stage surfaces are in an almost vertical posture, so that the stage surface formed of hard glass and the comparatively heavy printed circuit board are in contact with each other. The weight of the printed circuit board hardly acts on the film sandwiched between them, so even if sliding movement is applied by fine adjustment to align the film and printed circuit board, the film will not be damaged. In addition, the operator can perform various tasks in a natural posture, such as aligning the film and printed circuit board, monitoring the setting status of the film itself, and monitoring the stage surface for dirt. Can be done.

Furthermore, since the printed circuit board is moved in an almost upright position, the planar area occupied by the printed circuit board in the printing device is extremely small, which makes it possible to sufficiently reduce the planar size of the entire printing device. can.

Further, the printed circuit board is held in an upright position with its reference side at the bottom by a board stocker belt, and from this upright position it is placed on the positioning stage in an almost upright position with its reference side facing up, and this reference side is assembled onto the positioning stage. Although it is assembled using the reference for mounting positioning, in the board stocker belt,
Since each printed circuit board is held in an upright position with the reference side facing down, the height level of the reference side of each printed circuit board is kept constant, and therefore the printed circuit boards are fed to the positioning stage according to the height of the reference side. A natural positioning level is achieved, so that automatic feeding of the printed circuit board to the positioning stage occurs with very accurate positioning.

Since the direction in which the printed circuit board is transported in the printing device main body is perpendicular to the direction in which the printed circuit board is transported in the board stocker belt, and the direction in which the printed circuit board is transported after the board stocker belt is the same, the printing The configuration and operation of the substrate reversing device for supplying and taking out printed circuit boards to and from the main body of the apparatus can be simplified, and the supplying and taking out operations can be performed accurately and smoothly.

[Brief explanation of drawings]

FIG. 1 is an overall plan view showing an embodiment of the device of the present invention. FIG. 2 is a front view of the main body of the printing apparatus of the embodiment shown in FIG. FIG. 3 is a side view of the embodiment shown in FIG. 1, viewed from the left side. FIG. 4 is a plan view of the cross-feeding device in the embodiment shown in FIG. FIG. 5 is a front view of the substrate reversing device in the embodiment shown in FIG. 6 is a side view of the substrate reversing device shown in FIG. 5. FIG. FIG. 7 is a front view of the reversing device in the embodiment shown in FIG. Explanation of symbols: 1; Printing device; 2; Positioning panel; 3; First exposure device; 4; Second exposure device; 5; Holding panel; 10; Traversal feeding device; 13; Fixed frame; 1
4; Moving frame, 15; Drive cylinder, 17; Guide rod, 20; Holding device, 24; Suction cup, 30; Substrate reversing device, 30; Base body, 34; Suction cup body, 4
0; Reversing device, 41; Fixed frame, 42; Rotating frame, 60; Laminator, 62; Transfer reversing machine, 63; Substrate stocker belt, 64; Film stocker, 65; Film take-out device, 6
6: Ejection belt, A: Positioning stage, B: First exposure stage, C: Reversing stage, D: Second exposure stage, E: Ejection stage, P: Reference pin,
K: Printed circuit board, K1: Reference hole, K2: Reference side.

Claims (1)

[Claims] 1. A printed circuit board K with photosensitive material pasted on both sides,
A positioning panel 2 constituting a positioning stage A that is assembled and positioned with the reference side K2 with the reference hole K1 opened at the upper position, and a first exposure stage that performs printing on one surface of the printed circuit board K. A reversing device 40 comprising a reversing stage C for reversing the printed circuit board K, and a second exposure stage D for printing on the other side of the printed circuit board K. The stage surface of each stage is
They are placed in order on an imaginary single plane tilted at a constant inclination angle of about -5° to 30° with respect to the vertical plane, and fitted into the reference hole K1 at the upper end of each stage surface. A reference pin P for suspending and holding the printed circuit board K is provided on an imaginary single straight line, above the positioning panel 2, the first exposure machine 3, the reversing device 40, and the second exposure machine 4, A traversing device 10 that moves a holding device 20 that sucks and holds the printed circuit board K on each stage in parallel along an imaginary extension line of the reference side K2 of the printed circuit board K held on the positioning stage A.
A printed circuit board printing device comprising: 2 Printed circuit board K with photosensitive material pasted on both sides,
A positioning panel 2 constituting a positioning stage A that is assembled and positioned with the reference side K2 with the reference hole K1 opened at the upper position, and a first exposure stage that performs printing on one surface of the printed circuit board K. A reversing device 40 comprising a reversing stage C for reversing the printed circuit board K, and a second exposure stage D for printing on the other side of the printed circuit board K. The stage surface of each stage is
They are placed in order on an imaginary single plane tilted at a constant inclination angle of about -5° to 30° with respect to the vertical plane, and fitted into the reference hole K1 at the upper end of each stage surface. A reference pin P for suspending and holding the printed circuit board K is provided on an imaginary single straight line, above the positioning panel 2, the first exposure machine 3, the reversing device 40, and the second exposure machine 4, A traversing device 10 that moves a holding device 20 that sucks and holds the printed circuit board K on each stage in parallel along an imaginary extension line of the reference side K2 of the printed circuit board K held on the positioning stage A.
and a laminator 60 for adhering photosensitive material to both sides of the printed circuit board K while moving the printed circuit board K in a horizontal position with the reference side K2 positioned at the rear end, facing the positioning stage A. ,
A substrate stocker belt 63 receives the printed circuit board K with the photosensitive material pasted on both sides with the reference side K2 facing down by a transfer/reversing machine 62, and transports the printed circuit board K while maintaining the substantially upright posture; This printed circuit board printing apparatus is provided with a board reversing device 30 on the carry-in side for transferring and assembling the printed circuit board K transported by a car belt 63 onto the panel surface of the positioning panel 2.