JP4053756B2 - Printed wiring board and transfer method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed wiring board suitable for an automatic machine such as an automatic soldering apparatus, and more particularly to a printed wiring board capable of improving work quality and efficiency in a flux application process which is a pre-process of soldering or soldering work. Regarding the method.
[0002]
[Prior art]
Conventionally, when mounting an electronic component to a dip type printed wiring board with a connector or the like protruding outward from the outer edge of the printed wiring board, the protruding portion in the soldering fixing process and the flux application process that is the preceding process It is necessary to provide a protective member for protecting the solder from the adhesion of excess solder and flux. Hereinafter, an example of the structure of the protective member will be described with reference to FIGS. 6 and 7.
[0003]
In FIG. 6, two electronic components 2 are arranged on the flat printed wiring board 1 substantially at the center in the width direction. An electronic component 4 is attached near the outer edge of the printed wiring board 1 so that the connector 3 protrudes outside the outer edge. It should be noted that the printed wiring board 1 is mounted on both ends of the printed wiring board 1 in order to mount the electronic components 2, 4 and other components on the front surface of the printed wiring board 1 (front surface in FIG. 6). When the substrate 1 is inserted into a flux cage or solder cage, protective portions 5 and 5 are connected to prevent excess flux and solder from adhering to the exposed portion of the connector 3 from the back side of the page in FIG. Has been.
[0004]
As shown in FIG. 7, grooves 6 and 6 having a V-shaped cross section are formed at the boundary between the printed wiring board 1 and the protection parts 5 and 5. These grooves 6, 6 serve to discard the protection parts 5, 5 from the printed wiring board 1 after the electronic parts 2, 4, etc. are soldered and fixed to the printed wiring board 1. That is, the protective parts 5 and 5 are formed on the side where the grooves 6 and 6 are provided using the low-strength grooves 6 and 6 after the electronic parts 2 and 4 are soldered on the printed wiring board 1. Are folded from the printed circuit board 1 by folding the protective portions 5 and 5 on the opposite side (X direction in FIG. 7).
[0005]
[Problems to be solved by the invention]
As described above, conventionally, in the dip type printed wiring board 1 to which the electronic component 4 is attached so that the connectors 3 and 3 etc. protrude outward from the outer edge, the connector 3 and the connector 3 are used during the flux application process and the soldering fixing process. In order to protect the exposed portion 3 from solder and flux, protective portions 5 and 5 that can be discarded later are provided. However, when the protective portions 5 and 5 are removed from the printed wiring board 1 using the above-described grooves 6 and 6 after soldering and fixing, the connectors 3 and 3 protruding from the printed wiring board 1 become an obstacle to the separation work. . Therefore, there arises a problem that it is difficult to divide the protection parts 5 and 5.
[0006]
Moreover, since the protection parts 5 and 5 will be thrown away after soldering fixation, there exists a problem from the point of effective utilization of material. Naturally, this also leads to an increase in the manufacturing cost of the product.
[0007]
In addition, it is also possible to protect the connectors 3 and 3 from solder and flux by a method other than the example of FIG. 6 described above. For example, a protective film called a flux guard is applied to the connectors 3 and 3 or a masking tape is applied. However, even when such a method is adopted, the used protective film and masking tape cannot be reused. As a result, the material is not effectively used, and further, the manufacturing cost is increased. Moreover, since flux guards are dangerous goods, import / export may be restricted by international regulations.
[0008]
Conventionally, when the printed wiring board 1 is transported to a dip machine (soldering apparatus) for performing soldering and fixing by a transport device, the printed wiring board is guided by the carrier in a state where both side end surfaces are guided by a transport guide. 1 is moved. However, when it is necessary to transport printed wiring boards 1 having different widths due to specification changes, etc., the width of the transport guides of the transporting device and the transporting section in the dip machine is optimized according to the specifications of the printed wiring board 1. Need to be changed to As a result, the man-hour is increased by the adjustment work of the guide width of the conveyance guide, and there is a problem that the productivity is lowered.
[0009]
An object of the present invention is to eliminate the above-mentioned problems, and it does not cause waste in the material by performing the breaking after the soldering and fixing, and it is complicated to change the width of the conveyance guide on the conveyance device side. It is an object of the present invention to provide a printed wiring board and a transport method that can be efficiently produced without any work.
[0010]
[Means for Solving the Problems]
In order to achieve such an object, the printed wiring board of the present invention is a printed wiring board having electronic components protruding outward from the outer edge on the front surface, and is fitted to the side end surface on the side where the electronic components protrude. This fitting part fits into a concave or convex part provided on a jig plate for preventing the solder and / or flux from adhering to the electronic component from the back side of the printed wiring board. There is a feature that the jig plate can be attached by fitting the concave portion or the convex portion to the fitting portion .
[0011]
In addition to the above-described invention, a printed wiring board according to another invention is characterized in that the jig plate is attached by high-temperature solder.
[0012]
In addition to the above-described invention, in the printed wiring board of another invention , an attachment member is attached to the jig plate, and a groove or a recess is provided on a side end surface, and the groove or the recess is attached to the attachment member. The jig plate is characterized in that it can be attached by inserting an attachment member into the groove or recess .
[0013]
Further, the printed wiring board transport method of the present invention is a printed wiring board transport method in which an electronic component protruding outward from the outer edge is provided on the front surface, and the side end surface on the side where the electronic component protrudes and the side end surface A jig plate for preventing solder and / or flux from adhering to the electronic component from the back surface side of the printed wiring board on the side end surface that is opposite to the jig, and from the outside of the jig plate A process of attaching a jig plate having a width corresponding to the gap between the conveyance guide that holds the board and guides the slide movement and the printed wiring board, and slides the printed wiring board along the conveyance guide by the conveyance means. while having a step of inserting the rear surface of the printed wiring board to solder bath or flux tank, a step of removing the jig plate from the printed wiring board, and the side end surface Be provided fitting portion fitted to the concave or convex portion is provided in the jig plate, in the step of attaching jig plate, characterized in that it is mounted by fitting the concave or convex portion in the fitting portion It is said.
[0014]
In addition to the above-described invention, the printed wiring board transport method according to another invention is characterized in that the jig plate is attached by high-temperature solder .
[0015]
Conveying a printed wiring board or another invention, in addition to the above invention, the fixture plate, with a mounting member is attached, a groove or recess provided on the side end surfaces, fitted with the groove or recess It is an attachment part for attaching a member, and the jig plate is characterized in that it can be attached by inserting the attachment member into a groove or a recess.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIG. 1 and FIG. Members having the same configuration as that of the prior art shown in FIGS. 6 and 7 will be described using the same reference numerals as those in FIGS. 6 and 7.
[0017]
FIG. 1 is a plan view showing a printed wiring board according to the first embodiment of the present invention. FIG. 2 is a schematic plan view for explaining a transport unit that transports the printed wiring board shown in FIG. 1 to a flux pad or a solder pad.
[0018]
The printed wiring board 1 according to the first embodiment of the present invention has one near the right end in FIG. 1 (near the front end in the transport direction) and one in the center in the width direction, and near the left end in FIG. 1 (in the transport direction). A total of two electronic components 20, 20 are arranged in the width direction, one near the lower end in FIG. 1 (near the right end in the transport direction) in the width direction. Further, an electronic component 4 is attached in the vicinity of the outer edge on one side of the printed wiring board 1 (the outer edge on the upper end side in FIG. 1) so that the connector 3 protrudes outside the outer edge.
[0019]
Further, on the side end surfaces on both sides in the width direction of the printed wiring board 1, when the printed wiring board 1 is inserted into a flux cage or a solder cage, an extra space from the back side of the paper (the back side of the printed wiring board 1) in FIG. Protective jig plates 50 and 50 for preventing the flux and solder from adhering to the exposed portions of the connectors 3 and 3 of the electronic components 4 and 4 mounted on the front surface in FIG. Is attached. That is, the jig plates 50 and 50 are attached so as to hide the connectors 3 and 3 when viewed from the back side of the printed wiring board 1.
[0020]
The jig plate 50 is bonded and fixed to the printed wiring board 1 by high-temperature solder from the back side in FIG. 1 of the printed wiring board 1 serving as a solder fixing surface (in FIG. 1, the high-temperature solder fixing portion is indicated by a symbol F). ). The temperature at which the high-temperature solder melts is higher than the temperature of the solder for soldering and fixing the electronic component to the printed wiring board 1. Therefore, the printed wiring board 1 is not melted when dipped in a soldering iron for soldering and fixing electronic components. For this reason, the fixing portion by the high-temperature solder is peeled off at the time of soldering and fixing, and the jig plate 50 is printed wiring. There will be no detachment from the substrate 1.
[0021]
As shown in FIG. 1, the jig plates 50 and 50 are fixed to the printed wiring board 1 with high-temperature solder at several places, specifically, for example, temporarily fixed at three places on one side. After completion of soldering and fixing of the electronic parts in the soldering iron, the jig plates 50 and 50 can be removed from the printed wiring board 1 by melting the high-temperature solder fixing portions of the jig plates 50 and 50 with a soldering iron or the like. it can. Moreover, the jig plates 50 can be reused after removal. That is, the jig plates 50 and 50 for protecting the connectors 3 and 3 from the flux and solder are not discarded after being detached from the printed circuit board 1 like the conventional discarding part of the disposable board. It can be reused. As a result, waste of materials can be eliminated and manufacturing costs can be reduced.
[0022]
FIG. 2 schematically shows the transport unit 8 that transports the printed wiring board 1 to the flux and soldering irons with the jig plates 50 and 50 attached to both end faces of the printed wiring board 1 as described above. It is a figure.
[0023]
As shown in FIG. 2, the transport unit 8 includes both transport guides 80, 80 that grip the outer ends of the jig plates 50, 50 attached to both end faces of the printed wiring board 1, and both the transport guides 80, 80. And a plurality of rotating disk-shaped carriers 90 and 90 (only one is shown in FIG. 2). Protrusions 90 a and 90 a are attached to the outer peripheral edges of the carriers 90 and 90 at substantially equal intervals. As the carriers 90 and 90 rotate in the Y and Y ′ directions in FIG. 2, the protrusions 90 a and 90 a abut against the jig plates 50 and 50 attached to the both end surfaces of the printed wiring board 1, respectively. The carrier 90 and the protrusions 90a on which the printed wiring board 1 is conveyed in the direction indicated by the arrow G in FIG. 2 are conveying means for conveying the printed wiring board 1.
[0024]
The width W1 between the conveyance guides 80 and 80 of the conveyance unit 8 is such that the printed wiring board 1 including the outer end portion of the connector 3 protruding from the printed wiring board 1 in a state where the jig plates 50 and 50 are removed. It is configured wider than the width W2. Therefore, the connector 3 protruding in the width direction from the printed wiring board 1 does not collide with the protrusions 90a and 90a of the carriers 90 and 90 that enter the inside of the both conveyance guides 80, and the printed wiring board 1 contacts the conveyance guides 80 and 80. Conveyed along.
[0025]
The width W4 of the printed wiring board 1 varies depending on the specifications of the printed wiring board 1. Conventionally, it has been necessary to change the setting of the width W1 between the conveyance guides 80 and 80 in accordance with the change in the width W4 due to this model change or the like. It is possible to cope with the change of the width W4 of the printed wiring board 1 due to the model change without changing the width W1.
[0026]
That is, in the present invention, by preparing a plurality of types of both jig plates 50 and 50 attached to both end faces of the printed wiring board 1 and using them appropriately in accordance with the width W4 of only the printed wiring board 1 excluding the connector 3. It is possible to cope with a change in the width W4 of the printed wiring board 1 due to a model change or the like. For this reason, it is not necessary to set the width W1 between the conveyance guides 80 and 80 according to the model change or the like, and the width W1 of the conveyance guides 80 and 80 can always be kept constant.
[0027]
The above-described first embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention. . For example, in the above-described embodiment, the jig plates 50 and 50 are detachably attached to the printed wiring board 1 by high-temperature solder, but may be attached by other methods. Each example will be described as second and third embodiments, and will be described below with reference to FIGS. 3, 4, and 5.
[0028]
A printed wiring board 10 according to a second embodiment of the present invention will be described with reference to FIG. It should be noted that the same components as those in the first embodiment of the present invention described above will be described in a simplified manner, and mainly different portions will be described. In addition, the same reference numerals are used to indicate the same components as those in the first embodiment of the present invention described above.
[0029]
The electronic component 4 is attached to the vicinity of the upper edge in FIG. 3 of the printed wiring board 10 so that the connector 3 protrudes outside the outer edge. Further, on the side end surfaces on both sides in the width direction of the printed wiring board 10, when the printed wiring board 10 is inserted into a flux cage or a solder iron, it is excessive from the back side of the paper in FIG. 3 (the back side of the printed wiring board 10). Protective jig plates 51 and 51 for preventing the flux and solder from adhering to the exposed portions of the connectors 3 and 3 of the electronic components 4 and 4 mounted on the front surface in FIG. Is attached. That is, the jig plates 51 and 51 are attached so as to hide the connectors 3 and 3 when viewed from the back side of the printed wiring board 10.
[0030]
Note that convex portions 51 a and 51 a are formed on the side end surfaces of the jig plates 51 and 51. On the other hand, the side end face of the printed wiring board 10 is provided with recesses 10a and 10a that become fitting portions with the protrusions 51a and 51a. Both jig plates 51 and 51 are attached to the side end surfaces of the printed wiring board 10 by fitting the convex portions 51a and 51a to the concave portions 10a and 10a of the printed wiring board 10, respectively. The jig plates 51, 51 attached in this way can be removed from the printed wiring board 10 by removing the fit, and can be attached to another printed wiring board again, that is, can be reused. . For this reason, also in the second embodiment of the present invention, the printed wiring board 10 can be generated efficiently and at low cost without wasting materials.
[0031]
In the second embodiment of the present invention, the protrusions 51a and 51a are provided on the jig plates 51 and 51, and the recesses 10a and 10a are provided on the printed wiring board 10, respectively. May be provided in reverse. That is, a concave portion may be provided on the jig plate 51 side, and a convex portion may be provided on the printed wiring board 10 side.
[0032]
Next, a printed wiring board 11 according to a third embodiment of the present invention will be described with reference to FIGS. It should be noted that the same components as those of the first and second embodiments of the present invention described above will be described in a simplified manner, and different portions will mainly be described. In addition, when the same components as those in the first and second embodiments of the present invention described above are indicated, the same reference numerals are used.
[0033]
In the vicinity of the upper end edge of the printed wiring board 11 in FIG. 4, the electronic component 4 is attached so that the connector 3 protrudes outside the outer edge. Further, on the side end surfaces on both sides in the width direction of the printed wiring board 11, when the printed wiring board 11 is inserted into a flux cage or a soldering iron, it is extraneous from the back side of the page in FIG. 4 (the back side of the printed wiring board 11). , A protective jig plate 52 for preventing the flux and solder from adhering to the exposed portions of the connectors 4 and 4 of the electronic components mounted on the front surface in FIG. 52 is attached. That is, the jig plates 52 and 52 are attached so as to hide the connectors 3 and 3 when viewed from the back side of the printed wiring board 11.
[0034]
It should be noted that the jig plates 52 and 52 are printed on the corners between both end faces in the conveying direction (left and right direction in FIG. 4) of the jig plates 52 and 52 and the lower end in the width direction (up and down direction in FIG. 4). Holes 52a and 52a are provided for inserting adapter members 53 serving as attachment members for fixing to the substrate 11. On the other hand, similarly to the jig plates 52 and 52, mounting portions for inserting and attaching the adapter members 53 to the four corners of the both end surfaces in the width direction of the printed wiring board 11 and the both end surfaces in the transport direction, Concave portions 11a and 11a are provided. In addition, you may comprise these recessed parts 11a with a groove | channel.
[0035]
Then, in a state where the inner side end surfaces of the jig plates 52 and 52 are in contact with both side end surfaces in the width direction of the printed wiring board 11, they are substantially rectangular in the transport direction or in the direction opposite to the transport direction. When the flat adapter members 53 are respectively inserted, the jig plates 52 and 52 are respectively fixed to both end faces in the width direction of the printed wiring board 11. In FIG. 4, four adapter members 53 are used. However, grooves are provided along both contact surfaces of the printed wiring board 11 and the jig plate 52, and one adapter member 53 is provided on one side. The jig plate 52 may be attached to the printed wiring board 11.
[0036]
The jig plates 52 and 52 attached in this way can be removed from the printed wiring board 11 by pulling in the direction opposite to the direction in which each adapter member 53 is inserted and removing it from each recess 11a and hole 52a. it can. Moreover, it can be attached to another printed wiring board again, that is, reused. For this reason, also in the third embodiment of the present invention, the printed wiring board 11 can be generated efficiently and at low cost without wasting materials.
[0037]
According to each embodiment of the present invention described above, the connector 3 can be protected from solder or flux by the jig plates 50, 51, 52. In addition, since the jig plates 50, 51 and 52 can be removed from the printed wiring boards 1, 10 and 11 and reused, no material is wasted. In each of the above-described embodiments, the connector 3 is protected from solder or flux by the jig plates 50, 51, 52. However, the portion protruding from the printed wiring board 1 is a member other than the connector. However, the present invention is applicable in that the protruding portion is protected from solder and flux.
[0038]
In addition, according to each embodiment of the present invention, a plurality of jig plates 50, 51, 52 having different widths are prepared, and the width of the printed wiring boards 1, 10, 11 and between the conveyance guides 80, 80 on the conveyance device side are prepared. By using the plurality of jig plates 50, 51, 52 as appropriate according to the width of the sheet, it is not necessary to change the width between the conveyance guides 80, 80. Therefore, it is possible to produce printed wiring boards 1, 10, and 11 more efficiently.
[0039]
【The invention's effect】
As described above, according to the present invention, no material is wasted due to the breaking after soldering and fixing, and the complicated work of changing the width between the conveying guides on the conveying device side is performed. Therefore, it is possible to efficiently produce a printed wiring board.
[Brief description of the drawings]
FIG. 1 is a plan view showing a printed wiring board according to a first embodiment of the present invention.
FIG. 2 is a schematic plan view for explaining a transport unit that transports the printed wiring board shown in FIG. 1 to a flux pad or a solder pad.
FIG. 3 is a plan view showing a printed wiring board according to a second embodiment of the present invention.
FIG. 4 is a plan view showing a printed wiring board according to a third embodiment of the present invention.
5 is a side view of FIG. 4 as viewed from the direction indicated by the arrow V. FIG.
FIG. 6 is a plan view showing a conventional printed wiring board.
7 is a side view of FIG. 6 as viewed from an arrow VII.
[Explanation of symbols]
1, 10, 11 Printed wiring board 3 Connector 4 Electronic component 10a Recessed portion (fitting portion)
11a Concave part (mounting part)
50, 51, 52 Jig plate 51a Convex part 53 Adapter member (attachment member)

Claims (6)

A printed wiring board having electronic parts protruding outward from the outer edge on the front surface,
On the side end surface on the side from which the electronic component protrudes, a fitting portion is provided,
This fitting portion fits into a concave portion or a convex portion provided on a jig plate for preventing solder and / or flux from adhering to the electronic component from the back side of the printed wiring board.
A printed wiring board characterized in that the jig plate can be attached by fitting the concave portion or convex portion into the fitting portion.   The printed wiring board according to claim 1, wherein the jig plate is attached by high-temperature solder.   An attachment member is attached to the jig plate, and a groove or a recess is provided on the side end surface, and the groove or the recess is used as an attachment portion for attaching the attachment member. The printed wiring board according to claim 1, wherein the mounting member can be mounted by inserting the mounting member into the recess. In the method of transporting a printed wiring board with electronic parts protruding outward from the outer edge on the front surface,
For preventing the solder and / or flux from adhering to the electronic component from the back side of the printed wiring board on the side end surface on the side where the electronic component protrudes and the side end surface facing the side end surface A jig plate that holds the jig plate from the outside of the jig plate and that has a width corresponding to a gap between the printed circuit board and a conveyance guide that guides sliding movement is attached. Process,
Inserting the back surface of the printed wiring board into the solder bath or flux bath while sliding the printed wiring board along the transport guide by the transport means;
Removing the jig plate from the printed wiring board;
Have
The side end face is provided with a fitting portion that fits into a concave portion or a convex portion provided in the jig plate,
In the attaching step, the jig plate is attached by fitting the concave portion or the convex portion to the fitting portion.
A method for transporting a printed wiring board, comprising:   5. The method for transporting a printed wiring board according to claim 4, wherein the jig plate is attached by high-temperature solder.   An attachment member is attached to the jig plate, and a groove or a recess is provided on the side end surface, and the groove or the recess is used as an attachment portion for attaching the attachment member. 5. The method of transporting a printed wiring board according to claim 4, wherein the mounting is possible by inserting the mounting member into the recess.

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