JPH0717481Y2 - Work transfer device for fully automatic screen printer - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is mainly applied to a work such as a printed circuit board when applying a resist or the like to a printed circuit board for printing.
In a fully automatic screen printing machine that automatically performs a series of operations such as matching alignment corresponding to the coating printing position, coating printing, discharge, etc., makes it possible to smoothly carry in and out the work to and from the printing device. The present invention relates to a work transfer device for a fully automatic screen printing machine.

(Prior Art) Conventionally, a full-automatic screen printing machine provided with an alignment table for positioning a thrown workpiece in correspondence with a predetermined coating printing position when coating a resist on a printed circuit board (work). ing. The alignment is
After being set on the alignment table, the alignment mark on the work is read by, for example, a camera, and the alignment table is tilted with respect to the X direction, which is the direction in which the work is conveyed, the Y direction that is substantially orthogonal to the direction, and the conveyance direction. By adjusting the movement in each direction of the θ angle, the relative positional deviation from the normal position is corrected. After alignment, the work table fixed to the vacuum is carried to the printing device by the carrying table.

(Problems to be solved by the invention) In such a conventional fully automatic screen printing machine, the work aligned by the aligning device is carried into the position of the printing device, and the work after printing is removed from the printing device. In order to carry out to the position of the carrying-out device, a carrying device is used in which a carrying-out table and a carrying-in table are integrally connected to each other in the front and rear (see, for example, Japanese Patent Publication No. 61-32144).

According to the transporting device having such an integrated connection structure of the loading table and the unloading table, the interval between the strokes for advancing and retracting them is set in correspondence with the loading distance or the unloading distance. Since the stroke from the aligning device to the printing device and the stroke from the printing device to the ejecting device are not necessarily the same, it is necessary to correspond to the longer one of them.

However, in the former case, since it is necessary to maintain the stationary state of the aligned work and to correspond to the size of the work with the maximum width, a certain distance interval is set and the alignment position and the printing device are set. And are to be installed. On the other hand, in the ejecting device, once ejected from the printing device, it is necessary to eject it to a predetermined position as it is. Therefore, it is necessary to set a constant distance between the printing device and the ejecting device. There is no such thing.

For this reason, conventionally, the stroke is usually set corresponding to the long distance between the aligning device and the printing device as compared with the distance between the printing device and the discharging device. Then, the length of the entire screen printing machine for carrying out the process while conveying it to the printing device and further to the discharging device becomes unnecessarily long, and the installation area thereof must be increased.

Therefore, this invention has been devised in consideration of the existing circumstances as described above, and when automatically performing a series of operations such as inputting of workpieces, alignment, coating and printing of resist, etc. When the work is carried in to the printing device and the work is carried out from the printing device at the same time, the stroke of the latter is short, but the stroke of the maximum width necessary to maintain the alignment state can be sufficiently secured, and An object of the present invention is to provide a work transfer device for a full-automatic screen printing machine that enables downsizing of the entire device and reduces its installation area.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the work transfer device of the fully automatic screen printing machine according to the present invention, for example, puts the input work W on the alignment stage 4 by the alignment device 3. It is provided in the fully automatic screen printing machine which is adapted to be aligned with the printing position by means of, and then fed into the printing device 5 by the carrying device 10 and carried out to the discharging device 8 after printing on the printing stage 6.

Then, the carry-in table 20 that moves forward and backward between the aligning device 3 and the printing device 5, the carry-out table 50 that moves forward and backward between both the printing device 5 and the discharging device 8, and both the carry-in table 20 and the carry-out table 50 can be expanded and contracted. Connect and carry-in table
Following the 20 round trips, the carry-in table 20 has the aligning device 3
When retreating to the side, the interval with the carry-out table 50 widens,
When the carry-in table 20 advances toward the printing device 5, the joint means 60 is designed so that the gap between the carry-in table 20 and the carry-out table 50 is narrowed.
It is characterized by having and.

In addition, the carry-in table 20 and the carry-out table 50 are configured to move forward and backward within the mutual gap between the alignment stage 4 and the printing stage 6 which are divided into the left and right sides of the alignment device 3 and the printing device 5, respectively. You can

Further, the joint means 60 has a joint cylinder 62 on a cylinder base plate 55 provided below the carry-out table 50.
Is fixedly arranged, and the joint shaft 64 connected to the front end of the carry-in table 20 may be connected to the cylinder rod of the joint cylinder 62 via a shaft block 66 slidably provided on the cylinder base plate 55. it can.

Further, in the joint means 60, a cylindrical urethane bumper 67 is fitted on the joint shaft 64, and a silane mount block supporting the joint cylinder 62.
A damper 68 can be attached to the 61 to configure it.

(Operation) In the fully automatic screen printing machine in which the work transfer device according to the present invention is incorporated, the aligning device 3 is operated by the feeding device 1.
The work W put into the inside is
When the apparatus is stopped and set on the aligning stage 4 and set is stopped, the aligning device 3 is operated to adjust the movement in each of the X, Y and θ directions to accurately position the predetermined print position work W.

When the alignment and fixing are completed, the transfer device 10 is operated, and the carry-in table 20 travels forward to the printing position of the printing device 5 to carry in the work W, and the carry-in table 20 travels forward to move the carry-out table 50. Since the printed work W on the printing stage 6 is carried out in synchronization with the forward traveling, the carrying-in table 20 and the printing stage 6 are stopped after being stopped at the printing position.
Screen printing is done above.

Work W loading / unloading table 50 by loading table 20
When the work W is carried out simultaneously by the above, the movement stroke amounts of the tables 20 and 50 are made different by the operation of the joint means 60.

First, the joint means 60 when the carry-in table 20 is retracted to the aligning device 3 side, the joint means 60 is extended by the carry-in table 20.
And the carry-out table 50 by increasing the distance between
The alignment device 3 and the carry-out table 50 are positioned and stopped at respective predetermined positions of the printing device 5.

Further, the joint means 60 when the carry-in table 20 is moved forward to the printing device 5 side, the contraction operation causes the carry-in table 20 to move.
And the carry-out table 50 to reduce the distance between the carry-in table 20 and
The printing device 5 and the carry-out table 50 are positioned and stopped at respective predetermined positions of the discharging device 8.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

<Outline of Full-Automatic Screen Printing Machine> As shown in FIGS. 6 and 7, a full-automatic screen printing machine in which the present invention work transfer device is incorporated is designed to apply a work W, which is a printed circuit board, for which coating printing is planned. The matching device 3 is charged by the charging device 1, the preliminary matching device 2 incorporated in the matching device 3 performs preliminary matching, and then the matching device 3 itself performs main matching. When this alignment is completed, the work W after alignment is sent to the printing device 5 by the transport device 10 of the present invention, and at the same time, the work W after printing by the squeegee unit 7 is carried out from the printing device 5 to the ejection device 8. Each of these devices 1, 2, 3, 10, 5, 8 is sequentially arranged along the conveyance direction of the work W.

In addition, the alignment stage 4 and the printing device 5 in the alignment device 3
Each of the printing stages 6 in is divided into left and right parts along the conveyance direction of the work W. Then, the carry-in table 20 and the carry-out table 50 of the carrying device 10 synchronously advance and retreat within the central gaps of the left and right parts thereof, and the carry-in table 20 is carried out between the aligning device 3 and the printing device 5. The table 50 reciprocates between the printing device 5 and the ejection device 8 while being raised and lowered in association with the advance and retreat.

<Outline of Work Transfer Device> As described above, the work transfer device according to the present invention carries in the work W from the aligning device 3 to the printing device 5 by the carry-in table 20, and further, the carry-in table 20. The carry-out table 50 that advances and retreats in synchronization with the above can also carry out the work W from the printing device 5 to the discharge device 8.

That is, as shown in FIGS. 1, 6, and 7, the aligning frame 3A of the aligning device 3, the print frame 5A of the printing device,
Also, a pair of guide rails 11 are laid across the discharge frame 8A of the discharge device 8 along the left and right in the transport direction of the work W. Then, the carry-in table 20 is placed on the guide rail 11 by the traveling guide 12 fixed to the lower surface, and the carry-out table 50 is placed on the guide rail 11 by the traveling guide 51 also fixed to the lower surface. Further, the carry-in table 20 and the carry-out table 50 are connected to the front of the carry-in table 20 via a joint means 60 that expands and contracts.

Further, for example, a conveyance motor installed and fixed to the printing frame 5A
Transport table 14 circulated by driving 13
20 is fixed so that the carry-in table 20 itself travels back and forth, and when the carry-in table 20 retreats toward the aligning device 3 side along with the operation of the joint means 60 following the reciprocal travel of the carry-in table 20, carry-out is carried out. The gap with the table 50 is widened, and the gap with the carry-out table 50 is narrowed when the carry-in table 20 advances toward the printing device 5 side.

<Loading Table> Further, the loading table 20 itself is in a floating state protruding above the alignment stage 4 and the printing stage 6 when moving forward, and is substantially flush with the printing stage 6 when printing at the position of the printing stage 6, and moves backward. Sometimes the printing stage 6,
The alignment stage 4 is formed in a depressed shape below the alignment stage 4, and elevating means 21 for this purpose is provided. Further, the carry-in table 20 is provided with a suction means 26 and a clamp means 31 for fixing the work W to be carried in so as to prevent the positional deviation during the carry-in.

As shown in FIGS. 4 and 5, the elevating means 21 is an elevating cylinder 23 in which a main body of the carry-in table 20 located on the upper surface is fixed to a cylinder base plate 22 which straddles the guide rail 11. Is operated so that it can be guided up and down through the lifting guide 24.

Further, as shown in FIG. 4, the suction means 21 has a vacuum pump (see FIG. 4) which is connected to a large number of suction holes 27 formed on the upper surface of the carry-in table 20 along the left-right direction of the suction table. (Not shown) or the like.

Further, the clamp means 31 fixes the work W on the carry-in table 20 at the aligning position after the alignment is completed by sandwiching it from the front and rear in the carry-in direction, and is configured symmetrically in the front-rear direction.

Therefore, as shown in FIG. 4 and FIG.
20 On the side surface of the linear base plate 32 that is vertically provided on the back surface of the main body, a slide base plate 34 and a clamp base plate 39, which are slid and guided through a linear guide 33 along the conveyance direction of the work W, are arranged in the front and rear, and the slide base plate A lock cylinder 37 for advancing and retracting a lock rack 36 that meshes with a base rack 35 arranged on the side surface of the linear base plate 32, and a slide cylinder 38 for advancing and retracting a clamp base plate 39 are attached to the 34, and the clamp base plate 39 has a vertical direction. A hook-shaped clamp plate 43 that is slid along is attached to a clamp cylinder 41 that allows the hook table clamp plate 43 to project from and retract to the upper surface of the carry-in table 20 main body through a clamp elongated hole 44 that is long opened in the carry-in table 20 main body in the carrying direction. It consists of

It should be noted that magnet plates 46 are attached to the front and rear ends of the carry-in table 20 and are magnetized by magnets 47 arranged at the carrying start position end of the aligning device 3 and the carrying end position end of the printing device 5, thereby carrying Make sure that the stopped state is maintained at the start and at the end of conveyance, and
A shock absorber 48 is additionally provided to absorb the shock at the end of forward / backward traveling (see FIGS. 1, 4, and 5).

<Unloading Table of Conveying Device> On the other hand, the unwinding table 50 itself projects upward of the printing stage 6 to lift the work W on the printing stage 6 when the printing table 6 is moved forward, and at the time of discharging at the discharging device 8 position and printing. At the time of retreating to the device 5 side, it is formed in a depressed shape below the discharge surface of the discharge position 8, and elevating means 52 for that purpose is provided (see FIG. 1).

As shown in FIGS. 1 to 3, the elevating means 52 has a slide base plate 54 connected between lower ends of lower plates 53 vertically extending to the left and right of the carry-out table 50 main body at the rear position.
In the front position, the cylinder rods of the lifting cylinders 56 fixed to the cylinder base plate 55 are connected to the unloading table 50 body, and the slide shaft 58 guided by the slide guide 57 attached to the lower plate 53 is attached to the unloading table 50 body. It is fixed on the bottom surface.

<Joint Means> The joint means 60 is adapted to expand and contract the distance from the carry-in table 20 by the operation of the joint cylinder 62 fixed to the carry-out table 50 itself (see FIG. 1).

In this joint means 60, as shown in FIGS. 1 to 3, a joint cylinder 62 is fixedly arranged on the cylinder base plate 55 via a cylinder mount block 61. On the other hand, a pair of left and right joint shafts 64 connected to a substantially U-shaped joint block 63 attached to the front end of the carry-in table 20 are slidable by a linear guide 65 provided on the cylinder base plate 55. It is connected to a shaft block 66 fixed to the cylinder rod of the cylinder 62.

In addition, a tubular urethane bumper 67 is fitted into the joint shaft 64, and cushions the impact with the lower plate 53 that is vertically provided at the rear portion of the carry-out table 50 itself when the joint shaft 64 itself is extended. In addition, the damper 68 attached to the cylinder mount block 61 damps the impact with the joint cylinder 62 when the join shaft 64 contracts.

Reference numeral 69 in the figure is an air pipe for supplying air for operating the cylinders (56, 62).

<Work Lift Mechanism> Further, in order to smooth the retreat and retreat of the carry-in table 20 and the carry-out table 50 of the carrying device 10 from below the work W placed on the printing stage 6 of the printing device 5, respectively. As shown in FIG. 6, a work lift mechanism 70 that lifts the work W placed on the print stage 6 after printing is incorporated in the print stage 6 portion of the printing apparatus 5.

The work lift mechanism 70 operates after the printing operation of the printing device 5 is finished and immediately before the carry-in table 20 and the carry-out table 50 of the carrying device 10 travel backward.
Lift the rear side in the transport direction of. As a result, below the work W, the carry-in table in the carrier device 10
20 retreats and retracts to the aligning device 3 side with the work W left, and similarly, the carry-out table 50 retreats and enters below to carry out the work W, which is smoothly performed.

<Example of Operation> Next, an example of the operation of the work transfer device of the present invention will be described.

When the work W is loaded into the aligning device 3 by the loading device 1, the aligning stage 4 is divided into left and right parts, and the carry-in table positioned in the gap between the aligning stages 4.
Stopped at a predetermined position on 20. When stopped, a relative positional deviation from the normal position in the printing device 5 is detected and aligned so as to match the X direction along the loading direction into the printing device 5 and the Y direction substantially orthogonal to the loading direction. , And the alignment stage 4 is moved and adjusted in each direction of θ which is a predetermined inclination angle with respect to the carry-in direction, and the work W is accurately positioned corresponding to a predetermined printing position.

When the alignment and fixing are completed, the transfer device 10 is operated, and the carry-in table 20 travels forward to the printing position of the printing device 5 to carry in the work W, and the carry-in table 20 travels forward to move the carry-out table 50. The work W printed on the printing stage 6 is carried out in synchronization with the forward movement, and screen printing is performed on the carry-in table 20 and the printing stage 6 after being stopped at the printing position.

When the printing is completed, the work W is lifted up on the print stage 6 by the work lift mechanism 70, and the work W is printed on the print stage 6 even when the carry-in table 20 moves backward.
Remain on top. Then, the carry-in table 20 is the matching device 3
The carry-out table 50 also travels backward in the printing apparatus 5 at the depressed position with respect to the upper surface of the printing stage 6 in synchronization with the backward travel. At this time, the expansion of the joint means 60 increases the distance between the carry-in table 20 and the carry-out table 50, and the carry-in table 20 and the carry-out table 50 are positioned and stopped at predetermined positions of the aligning device 3 and the printing device 5, respectively. To be done.

Next, the carry-out table 50 rises to lift the work W. In the meantime, in synchronization with the carry-in table 20 that travels forward again at the same time as the completion of the alignment performed by the aligning device 70, the carry-out table 50 that travels forward moves out the work W from the printing device 5, and at the same time, in the printing device 5, A new work W is carried in, and printing is prepared. At this time, the space between the carry-in table 20 and the carry-out table 50 is reduced by the contraction operation of the joint means 60, and the carry-in table 20 is positioned at a predetermined position of the printing device 5 and the carry-out table 50 is positioned at a predetermined position of the discharge device 8. Be stopped.

On the other hand, the carry-out table 50 that has traveled forward to the discharge device 8
The work W is lowered to place the work W on the discharge device 8, and the placed work W is discharged and stored in a predetermined storage location by the discharge device 8.

<Effects of the Invention> The work transfer device of the present invention is configured as described above. Therefore, the fully automatic screen printing machine can perform a series of operations such as inputting the work W, alignment, coating printing of resist, and discharging. When the work W is carried into the printing device 5 and the work W is carried out of the printing device 5 at the same time when the work is automatically performed, the movement stroke amount of the latter carrying-out table 50 is reduced, By increasing the movement stroke of the carry-in table 20 which is the former, it is possible to secure a sufficient stroke with the maximum width necessary to maintain the alignment state, and it is possible to reduce the installation area of the entire screen printing machine. is there.

That is, this allows the carry-in table 20 that moves forward and backward between the aligning device 3 and the printing device 5 and the carry-out table 50 that moves forward and backward between both the printing device 5 and the discharging device 8 to be expandable and contractable via the joint means 60. Further, when the carry-in table 20 is reciprocated to follow the reciprocating movement of the carry-in table 20, when the carry-in table 20 is retracted to the aligning device 3 side, the interval with the carry-out table 50 is widened, and when the carry-in table 20 is advanced to the printing device 5 side. Is because the space between the carry-out table 50 and
This is because different installation intervals can be accommodated between the aligning device 3 and the printing device 5 in which the stroke is increased, and between the printing device 5 and the ejection device 8 in which the stroke is decreased.

Further, since the carry-in table 20 and the carry-out table 50 are configured to move forward and backward within the mutual gaps of the alignment stage 4 and the printing stage 6 which are divided into the left and right sides of the alignment device 3 and the printing device 5, respectively. The loading and unloading of the aligning device 3 to the printing device 5 and the unloading of the printing device 5 are in a state of supporting the work W at a substantially central position, so that not only the carrying operation is stabilized but also the entire carrying device 10 is carried out. It is also useful for making the fully automatic screen printing machine itself smaller.

Further, the joint means 60 has a joint cylinder 62 on a cylinder base plate 55 provided below the carry-out table 50.
Is fixedly arranged, and the joint shaft 64 connected to the front end of the carry-in table 20 is connected to the cylinder rod of the joint cylinder 62 via the shaft block 66 slidably provided on the cylinder base plate 55. By the extension operation of the cylinder 62, the carry-out table 50 itself can be smoothly slid back and forth, and the interval with the carry-in table 20 can be quickly set.

A cylinder mount block in which a tubular urethane bumper 67 is fitted on a joint shaft 64 and which supports the joint cylinder 62 in the joint means 60.
Since the damper 68 is attached to the 61, it is possible not only to reduce the mechanical shock at the time of extension or contraction and to reduce the shake due to the inertial movement of the workpiece W to be transported,
Reduce operating noise.

As described above, according to the present invention, the alignment state in the work to be carried in between the aligning device and the printing device is short even though the transport stroke for the work to be carried out between the printing device and the discharging device is short. It is possible to secure a sufficient carry-in stroke with the maximum width required to maintain the above, and further, it is possible to make the device of the entire fully automatic screen printing machine compact and to reduce the installation area.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of a carrying device, FIG. 2 is a partially cutaway plan view of a carry-out table showing joint means, and FIG.
FIG. 4 is a plan view of the carry-in table, FIG. 5 is a side sectional view of the same, FIG. 6 is a partially cutaway plan view of a fully automatic screen printing machine incorporating the device of the present invention, and FIG. 7 is a front view of the same. . W ... Work, 1 ... Injection device, 2 ... Preliminary alignment device,
3 ... Aligning device, 3A ... Aligning frame, 4 ... Aligning stage, 5 ... Printing device, 5A ... Printing frame, 6 ... Printing stage, 7 ... Squeegee unit, 8 ... Ejecting device, 8A ... … Ejection frame, 10… Transport device, 11… Guide rail, 12… Travel guide, 13… Transport motor, 14…
… Conveyor belt, 20… Carry-in table, 21… Lifting means,
22 …… Cylind base plate, 23 …… Lift cylinder,
24 …… Lifting guide, 26 …… Suction means, 27 …… Suction port, 28
…… Suction pipe, 31 …… Clamping means, 32 …… Linear base plate, 33 …… Linear guide, 34 …… Slide base plate, 35 …… Rack, 36 …… Lock rack, 37
…… Lock cylinder, 38 …… Slide cylinder, 39 ……
Clamp base plate, 41 …… Clamp cylinder, 43
...... Clamp plate, 44 …… Clamp slot, 47 …… Magnet plate, 48 …… Magnet, 49 …… Damper, 50 …… Delivery table, 51 …… Travel guide, 52 …… Elevating means, 53 …… Lower Plate 54 slide base plate 55 cylinder base plate 56 lift cylinder 57 slide guide 58 slide shaft 60 joint means 61 cylinder mount block 62 joint cylinder , 63 …… Joint block, 64 …… Joint shaft, 65 …… Linear guide, 66 …… Shaft block, 67 …… Urethane bumper, 68 …… Damper, 69 …… Air pipe, 70 …… Work lift mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Ishii 1357 Tanoue, Shima, Hachiman-cho, Gujo-gun, Gifu No. 3 Tokai Seiki Co., Ltd. (72) Mitsuyoshi Washimi Tanoue, Shima, Hachiman-cho, Gujo-gun, Gifu Prefecture No. 1357 No 3 Tokai Seiki Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. A fully automatic system for aligning an input work by a aligning device in correspondence with a printing position on a aligning stage, then feeding the work into a printing device, and carrying out to a discharge device after printing on the print stage. Work transfer device in a screen printing machine, which can move in and out between an aligning device and a printing device, a transfer table in and out between both a printing device and a discharging device, and can expand and contract both the transfer table and the transfer table. Following the reciprocating movement of the carry-in table, when the carry-in table retracts to the aligner side, the distance from the carry-out table widens, and when the carry-in table advances to the printer side, the gap from the carry-out table becomes wider. A work transfer device for a full-automatic screen printing machine, characterized in that the work transfer device is provided with a narrowed joint means. 2. The carry-in table and the carry-out table are configured to move forward and backward within a mutual gap between a matching stage and a printing stage, which are divided into left and right parts of the aligning device and the printing device, respectively. Work transfer device for fully automatic screen printer. 3. A shaft block in which a joint cylinder is fixedly arranged on a cylinder base plate provided below a carry-out table, and a joint shaft connected to a front end of the carry-in table is slidably provided on the cylinder base plate. The work transfer device for a fully automatic screen printing machine according to claim 1 or 2, wherein the work transfer device is connected to the cylinder rod of the joint cylinder via the. 4. The joint means comprises a tubular urethane bumper fitted on the joint shaft, and a cylinder mount block supporting the joint cylinder is provided with a damper so as to buffer the shock during expansion and contraction. A work transfer device for a fully automatic screen printing machine according to any one of claims 1 to 3.