JPH05148682A - Masking device - Google Patents

Abstract

PURPOSE:To provide the efficient device which eliminates the mis-registration of masking by improving the accuracy of the position where a circuit board is supported and adopting the constitution to enable the free selection of the position of a tape and tape width. CONSTITUTION:The printed circuit board 1 is placed on a circuit board rest 28 of a loader unit 20 for positioning. A base 22 is transported to the masking position so as to meet the length in the transportation direction of the circuit board 1. A rotary encoder 52 detects the moving quantity of the printed circuit board 1 from the rotating quantity of a laminating roller 51b and stops a motor 53 to end the masking when a set feed rate is attained. The operation is then progressed to a cutter unit 60 and an unloader unit 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking device used for attaching a masking tape to a substrate such as paper or a thin plate.

[0002]

2. Description of the Related Art When plating a plug terminal of a printed circuit board, a tape masking device is used to mask a portion where plating is not performed.

An example of the structure of a conventional masking device is shown in FIGS. 14 and 15. As shown in the figure, in the conventional masking device, a positioning loader unit 2 is provided on the carry-in side of a printed circuit board 1 to be tape-masked. The positioning loader unit 2 transfers the printed circuit board 1 to a masking position by means of a guide shaft 3 fixed to the main body of the apparatus, and a positioning plate 5 mounted orthogonal to the transfer direction and attached to the tips of the pair of guide shafts 4a and 4b. Then, one end of the printed circuit board 1 is brought into contact with the printed circuit board 1 and fixed by a clamp 6 to position the masking position.

The taping section 7 is a section for performing tape masking on both surfaces of the printed circuit board 1 transferred from the positioning loader unit 2. Taping section 7
Is a tape holder 8 whose one end is cantilevered on the side of the main body.
Tape windings 9a and 9b are loaded on a and 8b, and two upper and lower laminating rollers 11a and 11b are arranged with the transport path sandwiched therebetween. The tape fed from the tape windings 9a and 9b is sandwiched between both surfaces of the printed circuit board 1 and the two upper and lower laminating rollers 11a and 11b, respectively, and the laminating roller 11 rotates while pressing the tape to rotate the printed circuit board 1 Is tape masked.

Cutters 12 are provided on the unloading side of the laminating roller 11, respectively, and the tape is cut from the printed circuit board 1 for which masking has been completed, and the unloader section 13 carries the printed circuit board 1 to the next step. ..

In the above-mentioned masking device, the boundary tape winding 9a and the lead tape winding 9b are arranged at a predetermined interval in accordance with the masking pattern, and the printed circuit board 1 is visually observed in the positioning loader unit 2 in accordance with this. Position. When the positioning is completed, the clamp board 6 is fixed, the printed circuit board 1 is conveyed, and the tape is attached. In this way, masking as shown in FIG. 16 is performed.

By the way, in the conventional masking device, the tape holders 8a and 8b are cantilevered so that the masking device is short and the place where the printed circuit board 1 is installed is limited. ..

Further, since the tape holder 8 is short, only one tape winding 9 can be loaded in one tape holder 8. Therefore, for example, in the case of a multi-piece printed circuit board 1a as shown in FIG. 17, if the first printed circuit board 1b is masked, then the printed circuit board 1a is reversed and the second printed circuit board 1c is masked. It was necessary to carry out the tape application multiple times. Therefore, in the case of a multi-piece substrate, it is necessary to attach the tape a plurality of times, which results in a long working time.

Further, since the printed circuit board 1 is visually positioned by the positioning plate 5 and then fixed by the clamp 6, the printed circuit board 1 is highly likely to be displaced at the time of clamping, and moreover, the tape holder 8 moves to the printed circuit board 1. Since the tape may be displaced during the process, the masking position accuracy may be reduced.

[0010]

Therefore, the conventional masking device has problems that the working time is long and the masking position is displaced when the tape application range is narrow and a large number of substrates are used.

The present invention has been made in view of the above circumstances, and the tape attaching position and the tape width can be freely selected with one tape holder, the structure of the device can be simplified, and the tape attaching position can be further improved. An object of the present invention is to provide a masking device capable of improving the accuracy and the masking position accuracy.

[0012]

In order to achieve the above object, a masking device according to the present invention comprises a guide formed along the transport direction of a substrate to be masked, and the guide being orthogonal to the transport direction. Rails slidably mounted,
A positioning member that fixes the substrate while holding one end of the substrate that is moved on the rail and positioned, and fixes the substrate by the positioning member after the substrate is conveyed to the masking position along the guide. A positioning loader unit for releasing the position, a tape holder on which both ends are held by side surfaces facing each other through the board conveying path and a tape winding is loaded, and both ends are held on side surfaces facing each other through the board conveying path. A tape that is slidably attached to a guide shaft and is disposed between the tape holder and the substrate, and has a tip portion disposed in the vicinity of the substrate and guides the tape fed from the tape winding to a predetermined position on the substrate. A laminator that sandwiches a tape positioned by the guide means and the tape guide means between the substrate and rotates in a direction in which the substrate is conveyed. A trawler, a cutter that cuts the end of the tape attached to the substrate sent from the laminating roller while maintaining a predetermined tension, and an unloader unit that carries out the substrate whose tape has been cut by the cutter. It should be equipped.

[0013]

According to the present invention, the substrate is fixed while holding the substrate positioned by the positioning loader unit, and in this state, the positioning member moves along with the rail along the guide to move the substrate to the masking position. As a result, displacement of the substrate when it is fixed is prevented. on the other hand,
The tape holder, whose both ends are held on opposite sides of the transport path along which the substrate is transported, has a length sufficient to cover the entire width of the substrate. Alternatively, a number of tape rolls can be loaded. The tape fed from these tape windings is guided to a predetermined position on the substrate by the tape guide and attached to the substrate by the laminating roller. As a result, the tape application range is significantly widened, the time required for tape masking of a multi-piece substrate is greatly reduced, and the masking position accuracy is also improved. After that, the tape is cut by a cutter while being prevented from being slackened by applying a predetermined tension, and is unloaded by an unloader unit.

[0014]

Embodiments will be described below with reference to the drawings.

1 and 2 show the overall construction of a masking device according to an embodiment of the present invention. In this embodiment, a positioning loader unit 20 for positioning the printed circuit board 1 and transferring it to the masking position, guide units 30, 40 for guiding the tape, a masking unit 50 for attaching the tape to the printed circuit board 1, and a tape. It is composed of a cutter unit 60 for cutting the substrate, an unloader unit 70 for carrying out the masked printed circuit board 1, and the like. The configuration of the positioning loader unit 20 is shown in FIGS. 3 and 4.

The positioning loader unit 20 is provided with a pair of guides 21a and 21b for transferring the printed circuit board 1 on both sides of the substrate transfer path. Guide 21
A base 22 is slidably attached to a and 21b orthogonal to the substrate transfer direction. A rail 23 is provided on the lower surface of the base 22 along the longitudinal direction thereof, and a plurality of positioning members 24 are slidably attached to the rail 23. The positioning member 24 has a lever 25 and an air cylinder 26, respectively. The positioning member 24 is clamped and fixed to the rail 23 by rotating the lever 25, and the pin 27 is moved up and down from the upper surface by the air cylinder 26. The base 22 has a long groove 22a formed at a position facing the pin 27 from its side edge, and the pin 27 protruding from the air cylinder 26 projects from the long groove 22a to the upper surface of the base 22. There is. In addition, the guide 2 is attached to the tip of the positioning loader unit 20 in the transfer direction.
Substrate holders 28, both ends of which are held, are provided on the side surfaces forming the outer side walls of 1a and 21b. The structure of the guide unit 30 is shown in FIGS.

The guide units 30 and 40 are composed of a tape holder 30 into which a tape winding is loaded and a tape guide member 40 which guides the tape fed from the tape winding to the printed circuit board 1. The tape holder 30 is shown in FIG.
As shown in FIG. 6, it comprises a fixed side 31a and a detached side 31b. One end of the fixed side 31a is fixed to one side face 33a of the two side faces facing each other across the transport path. Further, the detaching side 31b is detachably attached to the other side surface 33b, and the other ends of both sides are concentrically joined by inserting the respective convex portions into the bush 34 at the center of the conveying path. The tape holder guide 35 is attached to the attachment portion of the side surface 33b to which the removal side 31b is detachably attached.
Is provided. A notch 35a is formed in the tape holder guide 35. On the other hand, the removal side 31b
A hole 37 is formed at one end of the. This removal side 3
In 1b, the spring 38 is inserted into the hole 37 of the connecting shaft 36 having the central axis of the tip end thereof, and the other end is brought into contact with the central portion of the tape holder guide 35 having the notch 35a formed therein to form the side surface 33b It is detachably attached to. In addition,
The connection shaft 36 is for releasing the connection between the fixed side 31a and the removal side 31b between the tape holder guide 35 and one end of the removal side 31b in a state where the removal side 31b is detachably attached to the side surface 33b. It has a length that allows a sufficient margin. The pin 39 is a stopper.

As shown in FIGS. 7 and 8, the tape guide member 40 is provided below the tape holder 31 by holding both ends of the guide shaft 41 on the side surfaces 33a and 33b which hold both ends of the tape holder 31. It is arranged. A plurality of annular guide members 42 to 45 are slidably attached to the guide shaft 41. These guide members 42 to 45
Are fixed to the guide shaft 41 by clamps 42a to 45a provided respectively. Further, the tape windings T1 to T loaded in the tape holder 31 are provided on the guide members 42 to 45.
The guide plates 42b to 4b that regulate one end of each tape fed out from each of the tapes 4 and have their tips extending in the vicinity of the printed circuit board 1.
5b is attached. In this embodiment, the same structure is attached to the lower side of the printed circuit board 1 so that both upper and lower surfaces of the printed circuit board 1 can be masked at the same time. The structure of the masking unit 50 is shown in FIGS.

The masking unit 50 detects the amount of movement of the printed circuit board from the laminating rollers 51a and 51b arranged at the masking position, a drive unit for driving the laminating rollers 51a and 51b, and the amount of rotation of the laminating roller 51b. The rotary encoder 52 and so on. The rotation of the motor 53, which is the driving source,
It is transmitted to the rotating shaft of the laminating roller 51b connected to the rotating shaft of the motor 53 with belts 54 and 55, and further transmitted to the rotating shaft of the other laminating roller 51a via the belt 56, the pulley 57, the belt 58 and the like. The laminating roller 51a is supported so as to be movable in the vertical direction by a slight amount. Air cylinders 59a and 59b are provided at both ends of the laminating roller 51a, respectively, and are adapted to receive downward pressing force. The structure of the cutter unit 60 is shown in FIG.

In the cutter unit 60, a fixed blade 61 is arranged slightly below the conveyance path through which the printed board 1 passes, and a movable blade 62 is arranged so as to face the fixed blade 61. Guide rods 63a and 63b are provided on the upper surface of the movable blade 62.
Is provided. On the other hand, above the moving blade 62, both ends of the holding member 6 are held by the side surfaces that face each other across the transport path.
4 has guide holes formed corresponding to the guide rods 63a and 63b. The movable blade 62 includes guide rods 63a, 63.
It is guided vertically by inserting b into the guide hole.
Further, the holding member 64 holds the air cylinder 65,
The moving blade 62 is held by the air cylinder 65. The air cylinder 65 is a rotary encoder 5.
The control is performed based on the disconnection timing signal output from 2. The timing at which the cutting timing signal is given is immediately after the printed circuit board 1 passes through the cutting portion. Reference numeral 66 is a bush. The configuration of the unloader unit 70 is shown in FIGS. 12 and 13.

The unloader unit 70 is provided with a pair of discharge rollers 71a and 71b, and rotation from a motor (not shown) is transmitted to a rotation shaft of the discharge roller 71b through a chain 72. Cylinders 74a and 74b are provided at both ends of the discharge roller 71a. The cylinders 74a and 74b apply a displacement force from the bottom to the top of the rotation shaft of the discharge roller 71a, whereby the discharge roller 71a is displaced downward with the rotation shaft 75 as a fulcrum. As a result, the pair of discharge rollers 71a and 71b are pressed. The rotation of the discharge roller 71 and the rotation of the laminating roller 51 are related to each other as described later. Next, the operation of this embodiment configured as described above will be described.

In the positioning loader unit 20, the reference holes H1 and H2 formed at one end of the printed board 1 are aligned with the board receiver 28, and the base 22 is moved according to the length of the printed board 1 in the carrying direction. .. The reference hole is required in the process and is not specially provided for this embodiment. Next, the two positioning blocks 24 are moved to move the air cylinder 26
Pin 27 is inserted into the reference holes H3 and H4 formed at the other end of the printed circuit board 1, and the positioning block 24 is fixed by the lever 25. After the printed board 1 is positioned as described above, the base 22 holding the printed board 1 is moved to the masking position along the guides 21a and 21b. The fact that the tip of the printed board 1 has reached the masking position is detected by a detector (not shown),
When it is detected that the masking position has been reached, the pin 27 of the air cylinder 26 is pulled out from the reference holes H3 and H4.

On the other hand, the tape holder 31 is preloaded with a plurality of tape windings. When loading a tape winding on the tape holder 31, the removal side 31b is pushed toward the tape holder guide 35 side, and the fixed side 31a and the removal side 31
b and the shaft 36 of the removal side 31b are released.
Slide the notch 35a out of the tape holder guide 35. Then, the pin 39 is removed and a tape winding is loaded. Next, the guide members 42 to 45 are moved according to the masking positions of the printed board 1, and the respective positions are fixed by the clamps 42a to 45a. Then, the tape windings T1 to T4 are arranged such that the ends thereof are along the corresponding guide plates 42b to 45b. This is performed on the upper and lower tape guide members 40.

Next, the tape fed from each tape winding T is inserted between the pair of upper and lower laminating rollers 51a and 51b via the tape guide portion 40. The laminating rollers 51a and 51b are pressed by the air cylinder 59 and rotated by the motor 53, so that the tape is masked on both surfaces of the printed board 1 while the printed board 1 passes between the laminating rollers 51a and 51b.

If the tape wound on the tape disappears during masking, the removal side 3 is used as described above.
Remove 1b. For example, when the tape winding T3 or T4 disappears in FIG. 7, the fixed tape winding T
Tapes can be exchanged without operating 1 and T2. On the other hand, when the tape winding T1 on the fixed side is replaced, the tape winding T3 and T4 are left as they are on the removal side 3
1b is removed, the tape winding T2 is once cut and removed, and a new tape winding is loaded. Then, the tape winding T2 is connected, and the removal side 31b is attached again.

The rotary encoder 52 detects the masking position by the detector, and then the laminating roller 5
The movement amount of the printed circuit board 1 is detected from the rotation amount of 1b.
Then, the amount of movement is determined by comparing the amount of movement detected with a predetermined amount of movement as the timing when the rear end of the printed board 1 passes between the cutting blades 61 and 62 of the cutter unit 60. When it reaches, the motor 53 is stopped to end the masking and the cutter unit 60
And a disconnection timing signal is sent to the unloader unit 70.

In the cutter unit 60, in response to the cutting timing signal from the masking unit 50, the air cylinder 65 is operated to move the moving blade 62 to cut the tape. In the unloader unit 70, the tip of the printed circuit board 1 sent from the laminating roller 51 passes through the cutter unit 60 and reaches the discharge roller 71. For this reason, the rotational speeds of the two are adjusted so that the tape attached to the printed circuit board 1 sent from the laminating roller 51 is not loosened, the temporary transfer is stopped when the cutting timing signal is output, and the tape is ejected after cutting. Only the roller 71 is driven and the masked printed circuit board 1 is carried out to the next step.

As described above, according to this embodiment, the reference hole H
Since the printed circuit board 1 is positioned by inserting the pins 27 of the air cylinders 26 into H3 and H4, the printed circuit board 1 is held in this state and moved along with the positioning blocks 24 along the guides 21a and 21b to the masking position. It is possible to prevent such a deviation when fixing the substrate as described above, and it is also possible to reduce the variation in positioning and improve the positioning accuracy.

Further, since the tape holder 31 covering the entire width of the printed circuit board 1 is loaded with the tape winding, and only the removal side 31b can be attached and detached from the middle thereof,
The configuration of the device can be simplified, and in the past, when one tape winding was lost during masking, all tapes had to be cut and replaced,
The tape can be replenished without cutting one tape, or by cutting the minimum required tape, and workability can be greatly improved. Moreover, the tape attachment position can be arbitrarily selected over the entire width of the printed circuit board 1, and
Tapes with different tape widths can be attached at one time, further improving workability.

Further, the tape fed out from the tape winding is guided to a predetermined position on the printed circuit board 1 by the tape guide portion 40 and attached to the printed circuit board 1 by the laminating roller 51, so that the masking position accuracy can be improved. .. The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the gist of the present invention.

[0031]

As described above in detail, according to the present invention, the tape attachment position and the tape width can be freely selected with one tape holder, the structure of the device can be simplified, and the tape attachment position accuracy can be improved. A masking device that can improve the masking position accuracy can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of a masking device according to an embodiment of the present invention.

FIG. 2 is a front view of the masking device according to the embodiment as seen from the direction D in FIG.

FIG. 3 is a plan view of the positioning loader unit viewed from the direction B in FIG.

FIG. 4 is a front view of the positioning loader unit seen from the direction E in FIG. 3.

FIG. 5 is a side view of the tape holder.

FIG. 6 is a partially enlarged view showing the tape holder.

FIG. 7 is a front view of the guide unit seen from the direction D in FIG.

FIG. 8 is a side view of the guide unit.

9 is a front view of the masking unit as seen from the direction D in FIG.

FIG. 10 is a side view of the masking unit viewed from the F direction in FIG. 9.

FIG. 11 is a front view of the cutter unit.

FIG. 12 is a front view of the unloader unit.

FIG. 13 is a side view of the unloader unit.

FIG. 14 is a plan view of a conventional masking device.

FIG. 15 is a side sectional view of the masking device.

16 is a plan view of a substrate masked by the device shown in FIG.

FIG. 17 is a plan view of a multi-piece substrate.

[Explanation of symbols]

20 ... Positioning loader unit, 30 ... Tape holder, 40 ... Guide unit part, 50 ... Masking unit, 60 ... Cutter unit, 70 ... Unloader unit.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshiyuki Ishinaga 1-24-24 Harumi-cho, Fuchu, Tokyo TOSHIBA FA System Engineering Co., Ltd.

Claims (1)

[Claims] 1. A guide formed along the carrying direction of a substrate to be masked, a rail slidably attached to the guide so as to be orthogonal to the carrying direction, and moved and positioned on the rail. A positioning loader unit that has a positioning member that fixes the substrate while holding one end of the substrate, conveys the substrate to the masking position along the guide, and then releases the substrate fixation by the positioning member; A tape holder whose both ends are held on opposite sides of the substrate via the transport path and a number of tape windings corresponding to the mask pattern are loaded, and a guide whose both ends are held on the opposite sides of the substrate via the transport path. The tape is slidably attached to a shaft and is disposed between the tape holder and the substrate, and the tip end portion is disposed in the vicinity of the substrate so that the tape is unwound from the tape winding. Guide means for guiding the substrate to a predetermined position on the substrate, a laminating roller for sandwiching the tape positioned by the tape guide means between the substrate and rotating in a direction for conveying the substrate, and delivering from the laminating roller. A masking device, comprising: a cutter that cuts the end of the tape attached to the substrate while maintaining a predetermined tension; and an unloader unit that carries out the substrate whose tape has been cut by the cutter. apparatus.