JP4101222B2 - Substrate transport apparatus and printed solder inspection apparatus using the substrate transport apparatus - Google Patents

Description

  The present invention relates to a board transfer device for transferring a printed solder board (hereinafter referred to as “board”) in order to mount a component on a printed solder board or to inspect a board on which solder is printed, and the board. The present invention relates to a printed solder inspection apparatus using a conveyance device. In particular, the present invention relates to a substrate carrying device capable of easily removing and attaching a belt for carrying a substrate.

  Generally, when mounting a component on a board or inspecting a board on which solder is printed, when the board conveyed using a belt comes to a specific position, the conveyance is stopped and the specific position (inspection) In position), a component is mounted on the substrate or inspected by an inspection device. Since the component mounting and the printed solder inspection require precision, it is necessary to accurately align the board with a specific position. Further, the thickness of the substrate ranges from a thin one of about 0.3 mm to a thickness of about 4 mm, for example, and the width in the conveyance direction of the substrate is regulated by the guide so that the substrate does not enter the gap between the belt and the guide. It is necessary to do so. For this reason, when transporting the substrate, guides are provided in the vertical and horizontal directions so that vertical and horizontal misalignments do not occur due to the conveyance so that the belt is not loosened or slackened.

  As described above, in terms of accuracy, the belt moves without play and is used for the purpose of forming a flow operation from the viewpoint of manufacturing efficiency, and thus wear due to the frequency of use of the belt occurs. When wear occurs, the accuracy decreases, and in this case, replacement is performed. However, as described above, since the belt is designed with less play for accuracy, there is a problem that replacement is not easy.

  The technique described in Patent Document 1 tries to eliminate the disadvantage. The main technique described in Patent Document 1 will be described with reference to FIGS.

  FIG. 6 is a structural diagram in which the belt 10 is sandwiched between the lower guide member 13 and the pressing member 12 from above and is rotated by the pulley 11. The belt protrusion 10a is inserted into the guide groove 13a of the guide member 13 and rotated. At the pulley 11, the protrusion 10a is inserted into the groove 11a of the pulley 11 and rotated, so that the belt 10 does not run out. Has been.

  Then, in order to make the belt 10 a structure that can be removed or mounted, the protrusions are not continuous as shown in FIG. 8 but are formed as short protrusions, and are arranged in an intermittent row in the transport direction. . As shown in FIG. 8, the protrusion row is provided with a protrusion removing portion A, and the belt 10 can be removed from the groove 11a or the guide groove 13a by inserting a force at the protrusion removing portion A or inserted. It is configured as possible.

  Since the protrusion 10a is intermittent and the protrusion removal portion A is long, the protrusion 10a may collide with the entrance corner of the guide groove 13a when the belt 10 moves from the pulley 11 to the guide member 13. Therefore, as shown in FIG. 7, the guide groove 13 is provided with a tapered portion 13b. Further, since the protrusions are tall and difficult to bend, a cut portion 10b is provided to provide flexibility as shown in FIG.

Japanese Patent No. 3555375 (Claims 1, 2 and 3 to 7)

  The patent document 1 has the following problems. That is, even if the tapered portion 13b is provided, there is a possibility that discontinuity occurs due to the protrusion removal portion A when the belt 10 moves from the pulley 11 to the guide member 13, and the belt 10 may collide with the tapered portion 13b. Wear is likely to occur and affects life. Even if the notch 10b is provided, the bendability is poor in the protrusion 10a due to the relationship between the diameter of the pulley 11 and the length of the protrusion 10a (that is, the way of bending in the notch 10b and the protrusion 10a. Therefore, there is discontinuity in the way of bending, and the degree of wear is partially different. In addition, the replacement of the belt 10 due to wear takes time because the portions of the belt 10 and the guide member 13 that are not restricted by the protrusions 10a are aligned.

  It is an object of the present invention to provide a board conveying apparatus that can easily remove and insert a belt from a guide member while ensuring continuous rotation and conveyance of the belt, and a printed solder inspection apparatus using the same. .

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a belt that carries one side of the substrate at one end in the width direction and transports in a longitudinal direction perpendicular to the width direction, along the longitudinal direction, An upper guide portion disposed at a width position excluding the one end portion in the width direction on the belt, and a lower guide disposed at substantially the same width as the belt below the belt along the longitudinal direction. A substrate carrying device having a section,
The belt and the upper guide portion include a guide mechanism that includes a groove that is continuous in the longitudinal direction on one side and a protrusion that fits in the groove on the other side, and prevents lateral vibration of the belt;
A belt having a width larger than the lateral guide mechanism on the belt side surface of the lower guide portion, and an insertion / extraction groove provided continuously in the longitudinal direction along the guide mechanism,
By the action from the outside in the width direction, the belt can be inserted and removed between the upper guide portion and the lower guide portion, using the insertion / extraction groove as a guide.

  The invention according to claim 2 is the invention according to claim 1, wherein the guide mechanism is fitted into a groove provided in an upper portion of the belt and a groove provided in a lower side of the upper guide portion. Or a groove provided on the lower side of the upper guide portion and a protrusion fitted in the groove provided on the upper portion of the belt.

According to a third aspect of the present invention, there is provided a belt on which one side of a printed board is mounted at one end in the width direction and transported in a longitudinal direction orthogonal to the width direction, and the belt is disposed on the belt along the longitudinal direction. An upper guide portion disposed at a width position excluding one end portion in the width direction, and a lower guide portion disposed at substantially the same width as the belt below the belt along the longitudinal direction. A printed solder inspection apparatus equipped with a board transfer device,
The belt and the upper guide portion include a guide mechanism that includes a groove that is continuous in the longitudinal direction on one side and a protrusion that fits in the groove on the other side, and prevents lateral vibration of the belt;
An insertion / extraction groove provided on the belt side of the lower guide portion with a recess having a width larger than the guide mechanism and continuously provided in the longitudinal direction along the guide mechanism;
A substrate transfer apparatus characterized in that insertion and extraction of the belt can be performed between the upper guide portion and the lower guide portion using the insertion / extraction groove as a guide by the action from the outside in the width direction. Prepared.

  According to the first to third aspects of the invention, since the insertion guide groove having a width larger than the width of the guide mechanism is provided in the lower guide portion directly below the guide mechanism, It can be easily removed by pulling in the direction. Further, when inserting the belt, the belt can be mounted by inserting one end of the belt in the width direction between the upper guide portion and the lower guide portion and pushing it in as it is. In this guide mechanism, the engagement between the belt and the upper guide portion is continuously performed so that discontinuity does not occur, and the influence on the inspection apparatus due to collision or discontinuity is suppressed. be able to.

  An embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a structural view of the transport device of this embodiment as viewed from the side with a belt attached. FIG. 2 is a structural view seen from above in FIG. FIG. 3 is a diagram showing the whole view of the present embodiment as viewed from above. A cross-sectional view at point N in FIG. 3 is shown in FIG. 4A shows the belt 2, the upper guide portion 3, and the lower guide portion 4 (referred to as “upper guide” and “lower guide” in the following description and drawings) at the point L in FIG. It is a figure which shows a cross section. FIGS. 4B and 4C are diagrams for explaining the procedures for inserting and pulling out the belt.

  In FIG. 1, two rollers 1 are provided at positions opposite to each other inside two support side plates 5 provided in parallel as shown in FIG. 3, and are driven by a motor or the like (not shown), thereby being wound. The belt 2 is rotated. The belt 2 is made of a material such as urethane rubber, and a plurality of metal wire rods are lined up and embedded in the moving direction (also in the conveying direction of the substrate 6) to enhance the tensile strength.

  As shown in FIG. 1, the substrate 6 is mounted on the belt 2 and conveyed, stops at the position of the sensor 9 a (inspection position) of the inspection unit 9, and the state of the solder printed on the substrate 6 is inspected. Is done. At that time, as shown in FIG. 2, one side of the substrate 6 is mounted and conveyed at one end in the width direction of the belt 2, but the width on which one side of the substrate 6 is mounted on the belt 2 is very small. For example, it is several mm. Therefore, the upper guide 3 and the lower guide 4 are arranged along the length of the belt 2 as shown in FIG. However, it is fixed to the support side plate 5 at a position sandwiching the belt 2 to regulate the belt 2.

  As shown in FIG. 1, the length of the upper guide 3 and the lower guide 4 is between the two rollers 1 on which the belt 2 is hung so as to be along the conveying direction of the belt 2. It has a length sufficient to take over the role of smoothly passing the flow of the belt 2 and handing it over to the other roller 1.

  On the surface of the belt 2, as shown in FIG. 2 or FIG. 4A, a recess having a rectangular shape in the width direction is continuously provided in the length direction (conveying direction) of the belt 2. An elongated belt groove 2a is provided. On the lower surface of the upper guide 3 facing the belt 2, a downwardly convex upper guide protrusion 3a is provided extending continuously in the longitudinal direction. The belt groove 2a and the upper guide protrusion 3a are fitted to each other, and the lateral vibration of the belt 2 being conveyed and the lateral vibration of the substrate 6 are prevented.

  The belt groove 2a and the upper guide protrusion 3a constitute a guide mechanism as described in the claims. As shown in FIG. 4A, it is preferable that the guide mechanism is fitted with a groove and a protrusion having a rectangular cross section in the width direction to reduce side slip. For example, if the cross section in the width direction is fitted with a triangular groove and a protrusion, it is not suitable because a side slip is likely to occur along the side of the triangle.

  On the upper surface of the lower guide 4 facing the belt 2, there is provided an insertion / extraction groove 4 a formed with a recess having a shape of a part of an arc in the width direction and extending in the longitudinal direction. The maximum width of the recess in the width direction of the insertion / extraction groove 4a is wider than the width of the belt groove 2a than the width of the upper guide protrusion 3a, and the flat portion 4b of the upper surface of the lower guide 4 excluding the insertion / extraction groove 4a is Thus, an area sufficient to suppress the vertical deflection of the belt 2a remains.

  The length of the insertion / extraction groove 4 a provided in the lower guide 4 is provided over the entire length of the lower guide 4. The cross-sectional shape of the recess of the insertion / extraction groove 4a affects the ease with which the belt 2 is pulled out or inserted. Therefore, the cross-sectional shape of the depression is preferably a shape that serves as a guide when the belt 2 is pulled out or inserted, that is, an arc or a U-shape. A triangular shape is also possible. In particular, since the belt 2 has a rectangular cross-sectional shape, if the belt 2 is inserted from the lateral direction, the tip of the insertion is guided in the mounting direction when the belt 2 is inserted from the lateral direction. Easy to install by pushing into. For example, if the recess is rectangular, the insertion tip of the belt 2 is caught on the rectangular wall, making it difficult to insert.

A method for inserting and removing the belt 2 will be described with reference to FIGS. 1, 4A and 4B. When pulling out the belt 2, in the vicinity of the boundary between the roller 1 and the upper guide 3 or the lower guide 4 in FIG. 1, the belt 2 is gripped by hand and twisted upward as shown in FIG. Pull (front). Then, when the central portion of the belt 2 in the width direction (the central portion of the belt groove 2a) falls into the insertion / extraction groove 4a of the lower guide 4, and further pulls forward according to the shape of the insertion / extraction groove 4a, as shown in FIG. In addition, the end of the belt 2 on the side of the support side plate 5 in the width direction falls into the insertion / extraction groove 4a and can be pulled out.

  The belt 2 can cope with some deformation when force is applied due to its own elasticity. For reference, when the damage due to wear exceeds an allowable value, the belt 2 is pulled out for replacement, and then discarded. Therefore, there is no problem even if the belt 2 is slightly damaged during pulling.

  When the belt 2 is pulled out at one place, it can be easily pulled out and removed across the entire length of the upper guide 3 and the lower guide 4 in the same manner as a bicycle chain.

  When the new belt 2 is inserted between the upper guide 3 and the lower guide 4, as shown in FIG. 4C, the end portion in the width direction of the belt 2 is inserted as a leading portion, and the side opposite to the leading portion is inserted. Is gripped and pushed along the arc of the insertion / extraction groove 4a. At this time, even if the leading portion in the width direction of the belt 2 may be slightly deformed temporarily, it has its own elastic force, so as to grab and push the opposite end portion of the leading portion of the belt 2, Installing.

(Other embodiments)
The guide mechanism including the upper guide protrusion 3a and the belt groove 2a in the above embodiment has the same operation and effect even if the relationship between the protrusion and the groove fitted thereto is reversed. That is, as shown in FIG. 5, an upper guide groove 8 a similar to the belt groove 2 a is provided on the lower surface of the upper guide 8, and a belt protrusion 7 a that fits in the upper guide groove 8 a is provided on the upper surface of the belt 7. The method of pulling out and inserting the belt 7 is the same as that of the structure shown in FIG.

  However, in the structure of FIG. 5, the central portion of the cross section of the belt 7 does not bend at the center as shown in FIG. 4B, and the root of the portion where the belt protrusion 7 a rises as a protrusion from the belt 7. It will bend in two places. Therefore, it is desirable to design in consideration of how to bend (bend) and the shape of the belt protrusion 7a and the insertion / extraction groove 4a of the lower guide 4, especially the width and height of each groove and protrusion. However, in the case of inserting one end portion of a new belt 7 in the lateral direction as a leading portion, the leading portion is thick in the structure of FIG. 4A, whereas in the structure of FIG. Since the portion can be made thin, insertion may be easy.

  In addition, it is necessary to consider the tension applied in relation to the radius of the roller 1 when the belt 2 or the belt 7 having the belt groove 2a or the belt protrusion 7a is rotated by the roller 1, that is, the flexibility. It is desirable that the width of the groove 2a or the belt protrusion 7a is within a width of about 1/3 to 2/3 so that the width does not become a local width with respect to the width of the belt 2 or the belt 7. The height (depth) of the belt groove 2a or the belt protrusion 7a is preferably about 1/3 to 1/2 of the thickness of the belt 2 or the belt 7. Then, it is not necessary to provide a notch in the protrusion of the belt as in the prior art.

It is the structure figure which looked at the state where the belt was attached to this embodiment from the side. FIG. 2 is a structural diagram viewed from above the structure of FIG. 1. It is a figure showing the whole picture which looked at this embodiment from the top. FIG. 4A is a view showing a cross section of the belt 2, the upper guide 3, the lower guide 4, and the like at a point L in FIG. FIGS. 4B and 4C are diagrams for explaining the procedures for inserting and pulling out the belt. It is a figure which shows the structure of other embodiment. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art.

Explanation of symbols

1 roller, 2 belt, 3 upper guide, 4 lower guide, 5 support side plate 6 substrate, 7 belt, 8 upper guide, 9 inspection section

Claims (3)

A belt (2) carrying one side of the substrate at one end in the width direction and transporting it in the longitudinal direction perpendicular to the width direction, and excluding the one end in the width direction on the belt along the longitudinal direction A substrate transport apparatus having an upper guide portion (3) disposed at a width position and a lower guide portion (4) disposed at substantially the same width as the belt below the belt along the longitudinal direction. Because
The belt and the upper guide part include a guide mechanism (2a, 3a) that includes a groove that is continuous in the longitudinal direction on one side and a protrusion that fits in the groove on the other side to prevent lateral vibration of the belt,
An insertion / extraction groove (4a) provided on the belt-side surface of the lower guide portion, having a recess having a width larger than that of the guide mechanism, and continuously provided in the longitudinal direction along the guide mechanism;
The substrate transfer apparatus according to claim 1, wherein the belt can be inserted and extracted between the upper guide portion and the lower guide portion by using the insertion / extraction groove as a guide by an action from the outside in the width direction. The guide mechanism includes a groove (2a) provided in the upper portion of the belt and a protrusion (3a) fitted in the groove provided on the lower side of the upper guide portion, or of the upper guide portion. 2. The substrate transfer apparatus according to claim 1 , comprising a groove (8a) provided on a lower side and a protrusion (7a) fitted in the groove provided on an upper portion of the belt. .

A belt (2) carrying one side of the printed and soldered substrate on one end in the width direction and transporting it in a longitudinal direction perpendicular to the width direction, and the width direction on the belt along the longitudinal direction An upper guide portion (3) disposed at a width position excluding one end portion, and a lower guide portion (4) disposed at substantially the same width as the belt below the belt along the longitudinal direction. A printed solder inspection apparatus provided with a substrate transfer device having
The belt and the upper guide part include a guide mechanism (2a, 3a) that includes a groove that is continuous in the longitudinal direction on one side and a protrusion that fits in the groove on the other side, and prevents lateral vibration of the belt,
An insertion / extraction groove (4a) provided on the belt side of the lower guide portion with a recess having a width larger than the guide mechanism and continuously provided in the longitudinal direction along the guide mechanism;
The substrate transfer apparatus characterized in that insertion and extraction of the belt can be performed between the upper guide portion and the lower guide portion by using the insertion / extraction groove as a guide by the action from the outside in the width direction. Printed solder inspection equipment.

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