JP2018111284A - Screen printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen printer which can handle a larger substrate.SOLUTION: A screen printer 1 includes: a first conveyor lane 5 including a pair of rail members which transports a substrate 10 while supporting both ends of the substrate; a second conveyor lane 6 including a pair of rail members which transports the substrate while supporting both the ends of the substrate; a first lifting mechanism which moves up or down the first conveyor lane in which the pair of rail members is assembled to a first lifting table in a movable state; a second lifting mechanism which moves up or down the second conveyor lane in which the pair of rail members is assembled to a second lifting table in a state where at least one of the rail members can move; a retreat table 8 to which the rail members can move; a rail moving mechanism which moves the rail members in the first lifting table, the second lifting table, and the retreat table and between these tables; and a control device which controls driving including transport of the substrate and movement of the rail members.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screen printing machine capable of transferring a substrate in each of two rows of conveyor lanes and capable of moving the positions of at least three rails constituting the conveyor lane in the width direction of the conveyor lane.

  Some dual-type printing machines having two rows of conveyor lanes for transporting substrates are configured such that rail members constituting each lane can move in the lane width direction. Patent Document 1 below discloses a printing machine that can change the width of a conveyor lane. That is, a drive mechanism that can move the rail member in the width direction is provided so that substrates of various sizes can be handled. The printing machine described in the same document has a first conveyor lane and a second conveyor lane in which two rail members are arranged in parallel to convey two substrates, and rail members at both ends of the four rail members. And the remaining two rail members are movable rails movable in the width direction. And the rail width of each of the 1st conveyor rail and the 2nd conveyor lane is adjustable by moving the position of a movable rail.

Special Table 2002-503161

  However, such a conventional printing machine has a configuration in which both ends of the four rail members are fixed rails, and the movable rail moves between them. For this reason, assuming that the width of both lanes is equal to the normal width, even if the rail width is extended, it is not possible to handle a board that is so large compared to a board having a normal width. In other words, since the first conveyor lane and the second conveyor lane are configured such that the movable rail moves only between the fixed rails of the two, in order to make the first conveyor lane the maximum width, the second conveyor lane is made the minimum width. It could only be spread as much as it was moved to. For this reason, it has not been possible to meet the demand for handling a larger substrate.

  Therefore, an object of the present invention is to provide a screen printing machine that enables handling of a larger substrate in order to solve such a problem.

  A screen printing machine according to the present invention includes a squeegee device for spreading cream solder from above on a mask held by a mask receiver, and a pair of rail members that support and convey both ends of the substrate under the mask. A first conveyor lane, a second conveyor lane disposed in parallel next to the first conveyor lane, and provided with a pair of rail members that support and convey both ends of the substrate under the mask, and a first lift A first elevating mechanism that elevates and lowers the first conveyor lane in which the pair of rail members are assembled in a state movable in the lane width direction with respect to the table; and at least one of the rail members is relative to the second elevating table A second elevating mechanism for elevating and lowering the second conveyor lane assembled with the pair of rail members in a movable state in the lane width direction; A retraction table arranged next to a conveyor lane and capable of moving the rail member, and a rail movement that moves the first and second elevating tables, the second elevating table and the retreat table with respect to the rail member, and moves between the tables. A mechanism and a control device for controlling driving such as transport of the substrate and movement of the rail member.

  According to the said structure, each rail member of a 1st conveyor lane and a 2nd conveyor lane is assembled | attached in the state which can move to a lane width direction with respect to a raising / lowering table, and also a rail member is also on a retracting table from the raising / lowering table. Because it is movable, in the expanded state from 2 lanes to 1 lane, by moving unused rail members to the evacuation table, the lane width can be increased, and handling of larger boards is possible. It becomes possible.

It is the side view which showed the inside of the screen printing machine simply. It is the perspective view which showed the 1st and 2nd conveyor lane of the screen printing machine. It is the side view which showed the 1st and 2nd conveyor lane of the screen printing machine simply from the body width direction. It is the figure which showed the state which the 1st conveyor lane rose. It is the figure which showed the state which expanded the conveyor lane. It is the figure which showed the state which the expansion conveyor lane rose. It is the figure which showed the state which has arrange | positioned the conveyor lane arbitrarily in the Y-axis direction.

  Next, an embodiment of a screen printer according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view schematically showing the inside of the screen printing machine according to the present embodiment. This screen printing machine 1 prints cream solder on a substrate, and constitutes a production line together with, for example, an inspection machine for inspecting a printing state and a component mounting machine for mounting electronic components on a substrate. . The screen printing machine 1 of the present embodiment is a dual type printing machine in which conveyor lanes for transporting substrates are arranged in two rows.

  In the screen printing machine 1, the substrate 10 is transported under a mask installed in the machine, and cream solder is applied to the lower substrate 10 from the upper surface of the mask through a printing pattern hole. The screen printing machine 1 is entirely covered by the machine body cover 4, and the conveyance ports 401 are opened on both side surfaces in the machine body width direction. A pair of mask holders 2 arranged in the machine body width direction are provided on the upper side of the machine, and a mask fixed to the mask frame is held.

  The mask holder 2 can hold a mask having a size corresponding to the substrate 10. In FIG. 1, the mask is held corresponding to one side (left side in the drawing) of two rows of conveyor lanes. When the substrate is transported and printed by both conveyor lanes, a larger mask is attached to the mask holder 2. A squeegee device 3 is installed on the upper side of the mask holder 2 and is attached so as to be movable in the longitudinal direction of the machine body. In the present embodiment, the front and rear direction of the screen printing machine 1 is described as the Y-axis direction, the body width direction (the conveyance direction of the substrate 10) is the X-axis direction, and the body height direction is the Z-axis direction.

  Below the mask holder 2, a first conveyor lane 5 and a second conveyor lane 6 for conveying the substrate 10 are configured. The first conveyor lane 5 and the second conveyor lane 6 are arranged in the longitudinal direction of the machine body (Y-axis direction), both of which are used to carry the board 10 in and out of the machine body width direction and to clamp the board 10 in the longitudinal direction of the machine body. And a backup device for moving the substrate 10 up and down to the clamping position. FIG. 2 is a perspective view showing the first conveyor lane 5 and the second conveyor lane 6. FIG. 3 is a side view schematically showing the first conveyor lane 5 and the second conveyor lane 6 from the width direction of the screen printing machine 1.

  Since the 1st conveyor lane 5 and the 2nd conveyor lane 6 are comprised similarly, the same code | symbol is demonstrated about the same structural member. First, the 1st and 2nd conveyor lanes 5 and 6 are comprised on the T-shaped raising / lowering table 11 which can raise / lower vertically. The lifting table 11 is moved up and down by a lifting motor 12. The elevating motor 12 is arranged with the output shaft facing downward, and a belt 16 is stretched between a pulley 13 fixed to the output shaft and a pulley 14 fixed to the screw shaft 15. The screw shaft 15 constitutes a ball screw mechanism, and is assembled in a vertical posture via a bearing (not shown).

  On the other hand, a lifter 17 is fixed to the leg portion 111 of the lifting table 11, and a nut inside the lifter 17 is screwed into the screw shaft 15. The elevating table 11 is assembled to a guide (not shown) and can be moved in the vertical direction while maintaining the posture shown in the figure. Therefore, when the pulley 13 is rotated by driving the lifting motor 12, the rotation is transmitted to the pulley 14 and the screw shaft 15 via the belt 16, and the rotational movement of the screw shaft 15 is further lifted via the nut. It will be converted into 17 linear motions. Thus, the lift table 11 supported by the lifter 17 moves in the vertical direction, and the height of the first and second conveyor lanes 5 and 6 can be adjusted.

  A gate-type rail frame 21 (21a, 21b, 21c, 21d) is attached to the lifting table 11 so as to straddle the table in the body width direction (X-axis direction). The elevating table 11 is formed with guide rails 112 protruding from both ends in the body width direction and along the body front-rear direction (Y-axis direction). The slider 22 assembled to the rail frame 21 is slidably fitted to the guide rail 112. Therefore, the rail frames 21a, 21b, 21c, and 21d are attached to the lifting table 11 so as to be movable in the longitudinal direction of the machine body. In particular, in the present embodiment, the first conveyor lane 5 and the second conveyor lane 6 have the same configuration, and the lifting tables 11 are arranged close to each other. Can be done.

  Further, the screen printing machine 1 is provided with a retracting table 18 in which a guide rail 182 is formed at the end, similar to the lifting table 11. The evacuation table 18 is fixed to the main body side according to the height when the elevating table 11 is lowered. Therefore, when the raising / lowering table 11 of the 1st conveyor lane 5 located adjacently falls, the rail frames 21a and 21b can go back and forth between the retreating tables 18. Incidentally, as shown in FIG. 1, the screen printing machine 1 is provided with a cleaning device 7 and a camera unit 8 so as to be able to move between the mask and the substrate. The cleaning device 7 or the like is normally disposed so as not to interfere with the first conveyor lane 5 or the like that moves to the retreat space at the front of the machine body and rises. As described above, since there is an empty space serving as a retreat space at the front of the body inside the body cover 4, the retreat table 18 newly added in the present embodiment is also arranged using the retreat space.

  Next, each of the movable rail frames 21 (21a, 21b, 21c, 21d) includes a moving mechanism 23 (23a, 23b, 23c, 23d). In the moving mechanism 23, support plates 25 and 26 arranged at the front and rear portions of the body are fixed to the body body side, and four movement motors 27 are attached to the support plate 25 on the front side of the body. On the other hand, a pulley 28 and a tension roller 29 are pivotally supported on the support plate 26 on the rear side of the machine body corresponding to the four moving mechanisms 23, and a moving belt 31 is stretched between the support plates 25 and 26. . A traveling plate 32 assembled to the rail frame 21 is connected to the moving belt 31 via a connecting member 321. Accordingly, when the movement belt 31 is rotated by the movement of the movement motor 27, the traveling plate 32 moves integrally with the rail frame 21 in the longitudinal direction of the body so as to be pulled by the movement belt 31. It will be.

  The rail frame 21 is configured with a substrate transfer device for transferring the substrate 10. In particular, the paired rail frames 21a and 21b and the rail frames 21c and 21d are each configured as a set of substrate transfer devices. A transport motor 35 is fixed to each rail frame 21, and a plurality of pulleys are pivotally supported. A pulley is also fixed to the rotating shaft of the conveyance motor 35, and a conveyor belt 36 is stretched around the pulley supported on the rail frame 21. The conveyor belt 36 is configured so that a horizontal conveyance portion is formed along the upper surface of the rail frame 21, and the substrate 10 is conveyed thereon.

  The structures such as the conveyance motor 35 and the conveyor belt 36 assembled to the rail frame 21 are arranged so that the pair of rail frames 21 (21a, 21b or 21c, 21d) have a point-symmetric relationship. Then, both end portions of the substrate 10 are placed on the conveyor belt 36 and the pair of transfer motors 35 are driven in synchronization with each other, so that the conveyor belt 36 rotates at the same timing and the posture of the substrate 10 is maintained. Transport is performed in a leaned state.

  Next, a backup device is configured between the paired rail frames 21. The backup device is for supporting the substrate 10 transported to the work position from below, and a plurality of backup blocks 42 for supporting the substrate 10 are detachably mounted on the backup table 41. Although not shown in detail, the backup table 41 is assembled to the lifting table 11 via a lifting mechanism. The second conveyor lane 6 shown in FIG. 3 is in a lowered state, and the first conveyor lane 5 is in a raised state. At this time, in the first conveyor lane 5, the substrate 10 is supported from below by the backup block 42, and is lifted up to the clamp position by raising the backup table 41.

  A clamp plate 43 for sandwiching and holding the substrate 10 in the width direction (Y-axis direction) is provided at the clamp position. The clamp plate 43 is a horizontal surface whose upper surface is applied to the lower surface of the mask and whose side surface is a vertical surface applied to the side surface in the width direction of the substrate 10. The clamp plate 43 is provided at the upper end of each rail frame 21, but is fixed in the rail frames 21 b and 21 c located on the inner side among the four, and can be moved horizontally in the rail frames 21 a and 21 d located on the outer side. It has become a structure. Therefore, a clamp mechanism 45 having a cylinder is assembled to the rail frames 21a and 21d. When the clamp mechanism 45 is driven, the distance between the clamp plates 43 is adjusted between the rail frames 21a and 21b and the rail frames 21c and 21d, so that the substrate 10 can be clamped and released.

  Next, the operation of the screen printer 1 will be described. In the screen printing machine 1, two rows of transfer lanes, the first conveyor lane 5 and the second conveyor lane 6, are configured by the arrangement of the rail frames 21a, 21b, 21c, and 21d, or one row of extension lanes as will be described later. Is configured. As shown in FIG. 3, when the conveyance lanes are arranged in two rows, rail frames 21a and 21b are arranged on the lifting table 11 on the first conveyor lane 5 side, and the rails 21a and 21b are arranged on the lifting table 11 on the second conveyor lane 6 side. Frames 21c and 21d are arranged. The position of each rail frame 21 is adjusted on the lifting table 11 so as to correspond to the size of the substrate 10 and the transport position.

  In the adjustment, the moving motor 27 of the moving mechanism 23 is driven, the rotation output is transmitted to the moving belt 31, and the traveling plate 32 attached to the rotating moving belt 31 moves in the Y-axis direction. The rail frame 21 connected to the travel plate 32 is moved to a predetermined position in the Y-axis direction when the slider 22 slides on the guide rail 112 of the lifting table 11. In FIGS. 1 and 3, the substrate 10 is transported only to the first conveyor lane 5 side of the two rows of conveyor lanes, and the mask holder 2 holds a mask corresponding to printing for one row. However, printing on the substrate 10 may be performed also on the second conveyor lane 6 side by changing the setup.

  The conveyance of the substrate 10 in the first conveyor lane 5 is driven by the conveyance motor 35, so that the rotation output is transmitted to the conveyor belt 36, and the substrate 10 placed on the horizontal conveyance portion of the conveyor belt 36 is brought into the machine. It is conveyed. After the conveyor belt 36 stops, the substrate 10 is positioned at the work position. As for the substrate 10 on the conveyor belt 36, the backup table 41 rises through an elevating mechanism (not shown), and the substrate 10 placed on the backup block 42 is raised to the height of the clamp plate 43. When the height of the substrate 10 is aligned with the clamp plate 43, the clamp mechanism 45 is driven, the clamp plate 43 on the rail frame 21a side approaches the clamp plate 43 on the rail frame 21b side, and the substrate 10 is sandwiched and clamped.

  Thereafter, when the raising / lowering motor 12 of the first conveyor lane 5 is driven, the rotation is transmitted to the screw shaft 15 via the belt 16, and the rotation is further transferred to the lifter 17 via a nut screwed to the screw shaft 15. Is converted into a linear motion. Therefore, as shown in FIG. 4, the lifting table 11 integrated with the lifter 17 is raised. At this time, the clamped substrate 10 is disposed in contact with the lower surface of the mask together with the clamp plate 43 or with a slight gap from the mask. Then, on the upper surface side of the mask, the supplied cream solder is rolled by the squeegee device 3 and pushed into the printed pattern hole of the mask. As a result, the cream solder is applied to the substrate 10 located under the mask, and a printed pattern is printed on the substrate 10.

  After printing, the lifting table 11 of the first conveyor lane 5 is returned to the position shown in FIGS. 4 to 3, the backup table 41 is also lowered, and the substrate 10 is transferred to the conveyor belt 36. Therefore, the conveyor belt 36 is rotated by driving the conveyance motor 35, and the substrate 10 is carried out of the apparatus. Such driving accompanying the conveyance and printing of the substrate 10 is performed in the same manner in the second conveyor lane 6. By the way, when both the first and second conveyor lanes 5 and 6 are used, the substrate size is limited to the size of the lifting table 11. However, actually, there are cases where printing is performed on more substrates. In such a case, the screen printer 1 expands the conveyor lane.

  FIG. 5 is a diagram showing a state where the conveyor lane is expanded to the maximum. For the expansion of the conveyor lane, the lifting table 11 of the first and second conveyor lanes 5 and 6 (hereinafter referred to as “lifting tables 115 and 116”) is used as an integrated body, and a pair of rail frames 21c, 21d is arranged. Therefore, first, the rail frames 21 a and 21 b are moved to the retreat table 18. Then, the rail frame 21 c is moved to the lifting table 115 of the first conveyor lane 5. The rail frames 21a, 21b, and 21c are moved to positions shown in FIG. 5 across the lift tables 115 and 116 and the retracting table 18 as the moving motors 27 of the moving mechanisms 23a, 23b, and 23c output their respective rotations. Will move to.

  When the rail frame 21 moves, the conveying motor 35 and the conveyor belt 36 that are integrally assembled also move. Therefore, the rail frame 21 is formed in a shape that allows the conveyance motor 35 to pass therethrough so that the conveyance motor 35 does not interfere on the narrow retreat table 18. In FIG. 5, rail frames 21 c and 21 d are arranged at the farthest positions of the lifting tables 115 and 116. That is, the rail frames 21c and 21d are arranged in accordance with the substrate 10a having the maximum width that can be handled by the screen printer 1.

  Therefore, when the conveyance motor 35 of the rail frames 21c and 21d is driven, the rotation output is transmitted to the conveyor belt 36, and the substrate 10a placed thereon is conveyed into the machine. After the substrate 10a stops at the work position, the backup tables 41 of the first and second conveyor lanes 5 and 6 rise synchronously, so that the substrate 10a placed on both the backup blocks 42 is moved to the clamp plate 43. It is lifted to a height that aligns with the top surface (see FIG. 6). Then, the clamp mechanism 45 is driven, the clamp plate 43 on the rail frame 21d side approaches the clamp plate 43 of the rail frame 21c, and the substrate 10a is sandwiched and clamped.

  Thereafter, as shown in FIG. 6, the lifting table 12 mounted with the rail frames 21 a and 21 b is left as it is, and the lifting and lowering motors 12 of the first and second conveyor lanes 5 and 6 are driven synchronously, so that the lifting table 115 and 116 rise together. The clamped substrate 10a is placed in contact with the lower surface of the mask together with the clamp plate 43, or is arranged with a slight gap from the mask. On the upper surface side of the mask, the supplied cream solder is rolled on the mask by the squeegee device 3 and pushed into the printed pattern holes. Thereby, the cream solder is applied to the substrate 10a under the mask, and the printing pattern is printed on the substrate 10a.

  Subsequently, FIG. 7 shows a case where the substrate 10 b larger than the substrate 10 is transported through the center of the transport port 401. In this case, the rail frames 21c and 21d move in a direction in which the interval is narrower than the position shown in FIG. 5, and positioning in the Y-axis direction is performed so as to correspond to the center of the transport port 401. A backup block 42 is mounted on the backup table 41 according to the positions of the rail frames 21c and 21d. Thus, the substrate 10b is transported by driving the transport motor 35 of the rail frames 21c and 21d, lifted by the backup block 42, and then clamped by the clamp plate 43, as in the case shown in FIG. Then, the substrate 10b raised by the raising / lowering motors 12 of the first and second conveyor lanes 5 and 6 is placed under the mask, and cream solder is printed by the squeegee device 3.

  Therefore, according to this embodiment, it is possible to carry out printing by transporting the substrate 10 in the two lanes of the first conveyor lane 5 and the second conveyor lane 6. Furthermore, printing on a large substrate 10b can be performed by expanding the first and second conveyor lanes 5 and 6 into one lane. In addition, since the rail frames 21a and 21b are moved to the retracting table 18, the lane width can be widened by using the elevating table 11 (115 and 116) to the maximum, so that it is possible to deal with a larger substrate 10a.

  Furthermore, the rail frames 21a and 21b that are not used for transporting the substrate 10a are moved from the first and conveyor lanes 5 and 6 onto the retracting table 18. In this regard, in a conventional configuration without a retracting table, a rail frame that is not used during printing also rises, and there is a possibility that the mask or the mask frame may be touched to adversely affect printing or the mask may be deformed. . In this respect, in this embodiment, there is no inconvenience that the rail frames 21a and 21b that are not used affect printing.

  In the present embodiment, the rail frames 21a, 21b, 21c, and 21d can all be moved by the moving mechanisms 23a, 23b, 23c, and 23d, so that the substrates 10, 10a, and 10b having different sizes can be used as described above. It becomes possible to respond. Then, as shown in FIG. 7, by arranging the rail frames 21c and 21d at arbitrary positions in the Y-axis direction, the board is fed to the next mounting machine or the like without using the shuttle conveyor. Can do. This is the same in the case of two lanes by the first and second conveyor lanes 5, and the width of each substrate and the transport position in the Y-axis direction can be arbitrarily set. Further, in the screen printing machine 1, the evacuation table 18 is arranged in the evacuation space in the machine body cover 4, so that no major design change is required for the machine body cover 4 or the like.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, in the embodiment, the rail frames 21 a, 21 b, 21 c, and 21 d are all movable, but the rail frame 21 d located on the opposite side of the retracting table 18 may be fixed to the lifting table 11.

DESCRIPTION OF SYMBOLS 1 ... Screen printer 2 ... Mask holder 3 ... Squeegee apparatus 5 ... 1st conveyor lane 6 ... 2nd conveyor lane 10 ... Board | substrate 11 ... Lifting table 12 ... Lifting motor 18 ... Retraction | saving table 21 (21a, 21b, 21c, 21d ) ... Rail frame 22 ... Slider 23 (23a, 23b, 23c, 23d) ... Movement mechanism 35 ... Conveyance motor 36 ... Conveyor belt

Claims (4)

A squeegee device for spreading cream solder on the mask held by the mask holder from above;
A first conveyor lane provided with a pair of rail members for supporting and conveying both ends of the substrate under the mask;
A second conveyor lane that is arranged in parallel next to the first conveyor lane and includes a pair of rail members that support and convey both ends of the substrate under the mask;
A first elevating mechanism that elevates and lowers the first conveyor lane assembled with the pair of rail members in a state movable in the lane width direction with respect to the first elevating table;
A second elevating mechanism that elevates and lowers the second conveyor lane in which the pair of rail members are assembled in a state in which at least one of the rail members is movable in the lane width direction with respect to the second elevating table;
A retraction table disposed next to the first conveyor lane and capable of moving the rail member;
A rail moving mechanism for moving the first elevating table, the second elevating table and the retracting table with respect to the rail member, and moving between the tables;
A screen printing machine having a control device for controlling driving such as conveyance of a substrate and movement of the rail member.   The plurality of rail members constituting the first conveyor lane and the second conveyor lane are moved by the lane moving mechanism so that the rail members used for transporting the substrate are placed at predetermined positions on the first lifting table and the second lifting table. The screen printing machine according to claim 1, wherein rail members that are arranged and are not used for transporting a substrate are arranged on the evacuation table.   In the rail members constituting the first conveyor lane and the second conveyor lane, the distance between the pair of rail members and the position of the pair of rail members with respect to the lifting table are arbitrarily arranged by the lane moving mechanism. The screen printing machine according to claim 1 or 2. The screen printing machine according to any one of claims 1 to 3, wherein the evacuation table is provided at a front portion of the machine body serving as a evacuation place for a cleaning device that moves in the front-rear direction of the machine body.

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