JP2007063025A - Board carrying/supporting device and electric component mounting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry/support a large printed board while avoiding an increase in the size of a board carrying/supporting device having two sets of belt conveyors and board supports. <P>SOLUTION: Two sets of width-variable belt conveyors 24, 26 are arranged in parallel, and a guide rail 112 for one 24 of the two sets of belt conveyors is movable beyond a center position between the two sets of belt conveyors to a region of the other belt conveyor 26. One board support 150 is provided for each of the two sets of belt conveyors. In the state that one 24 of the two sets of belt conveyors is varied to be wider beyond the center position, the printed board which is carried via the belt conveyor 24 being wider is supported by the cooperation of the two board supports 150 provided corresponding to the two sets of belt conveyors 24, 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a substrate transport / support device including a belt conveyor for transporting a printed circuit board such as a printed wiring board and a printed circuit board, and a substrate support device for lifting and supporting the printed circuit board transported by the belt conveyor from the belt. In particular, the present invention relates to a substrate transport / support device including two sets of belt conveyors arranged in parallel to each other and two substrate support devices corresponding to the respective belt conveyors.

  This type of substrate transport / support device is provided in, for example, an electrical component mounting system that assembles a printed circuit board by mounting electrical components on a printed wiring board. The electrical component mounting system includes: (1) a substrate transfer device; (2) a substrate support device; (3) a component supply device that selectively supplies multiple types of electrical components; and (4) the component supply. A component mounting device that receives electrical components from a device and mounts the electrical components on a printed circuit board supported by the substrate support device, and this type of electrical component mounting system includes two sets of belt conveyors and two components A substrate carrying / supporting device provided with a substrate supporting device is provided.

  In the electrical component mounting system, the electrical component is mounted by the component mounting device on the printed wiring board carried by the substrate transport device and supported by the substrate support device. While the circuit board or the printed wiring board in a semi-finished state is carried out by the board transfer device, and the next printed wiring board on which the electrical component is to be loaded is carried in, the component mounting device can mount the electrical component. Can not. Since this causes a reduction in the efficiency of the assembly work, two sets of belt conveyors for conveying the printed wiring board are arranged in parallel, and while one of the belt conveyors is carrying out and carrying in the printed circuit board, If electrical components can be mounted on the printed wiring board supported by the substrate support device corresponding to the belt conveyor, electrical components can be mounted without a break, improving the efficiency of the mounting operation. To do.

However, in the electrical component mounting system including the board conveying / supporting device having this configuration, when it is possible to mount electrical components on a large printed circuit board, two sets of wide belt conveyors are arranged in parallel. Therefore, it is inevitable that the substrate transfer / support device becomes larger, the electrical component mounting system becomes larger, and the required installation area becomes larger. On the other hand, it is relatively rare that electrical components need to be mounted on a large printed wiring board, and it is desirable that the electrical component mounting system be increased in size and the required installation area is increased due to the small necessity. is not. Such problems include not only the electrical component mounting system, but also, for example, an adhesive application system for applying an electrical component adhesive to a printed wiring board by a dispenser, a circuit board inspection system for inspecting a printed circuit board, etc. This also occurs in a substrate-based work system that performs some work on the printed circuit board.
The present invention, against the background of the above circumstances, makes it possible to transport and support a large printed circuit board while avoiding an increase in the size of the substrate transporting and supporting apparatus including two sets of belt conveyors and a substrate supporting apparatus. It was made as an issue.

Problem solving means and effects

According to the present invention, (a) two guide rails and two belts guided around each guide rail are provided, and the distance between the two belts is determined by the approach and separation of the two guide rails. And a belt conveyor capable of changing the width to support and convey both edge portions of the printed circuit board having different widths by the two belts, and (b) a print supported by the two belts. A substrate transporting / supporting device including a substrate supporting device for lifting and supporting a substrate from below, wherein two sets of the belt conveyors are arranged in parallel to each other, and one guide rail of the two belt conveyors is provided It is possible to move beyond the central position between the two belt conveyors to the area of the other belt conveyor, and one substrate support device is provided for each of the two belt conveyors. When the width of one of the two belt conveyors is widened beyond the central position, the printed circuit board conveyed by the wide belt conveyor is transferred to the two belt conveyors. A substrate transporting / supporting device characterized in that two substrate supporting devices provided corresponding to each other are supported together is obtained.
According to this substrate transport / support device, when the printed circuit board to be transported is relatively small, the widths of the two belt conveyors are matched to the printed circuit board to be transported, and one of the belt conveyors is stopped. The other belt conveyor can be operated to convey the printed circuit board. Therefore, for example, if this board transport / support apparatus is employed in an electrical component mounting system for mounting electrical components on the following printed circuit board, the mounting operation of the electrical parts on the printed circuit board carried by one belt conveyor can be performed. While one of the belt conveyors is stopped, the printed circuit board mounted on the other belt conveyor is carried out and the next printed board is carried in. Work efficiency can be improved.
If it is necessary to transport and support a large printed circuit board, the width of one of the two belt conveyors is reduced while the width of the other belt conveyor is reduced to two belt conveyors. A large printed circuit board that extends beyond the central position between the two belt conveyors to the area of the one belt conveyor and is transported by such a wide belt conveyor is provided for two sets of belt conveyors. It is possible to support the two substrate support devices together.
Therefore, it is possible to efficiently work on a relatively small printed circuit board while avoiding an increase in the size of the substrate transfer / support device, and it is also possible to carry a large printed circuit board and stably support it. A substrate transporting / supporting device that can be obtained is obtained.
Further, according to the present invention, two sets of (1) the substrate transport / support apparatus and (2) each of the two sets of belt conveyors are provided to selectively supply a plurality of types of electrical components. A component supply device; and (3) an electrical component mounting device for mounting electrical components supplied by the two sets of component supply devices on a printed circuit board supported by the substrate support device. (I) at least two mounting heads; and (ii) prints that are transported to the two mounting heads by the two sets of belt conveyors and supported by the substrate support device corresponding to the respective belt conveyors. The first control mode in which the electric components are mounted on the substrate in cooperation with each other, and the two belt conveyors that are transported by the belt conveyor that is widened beyond the central position, support the two substrates. An electrical component mounting system is provided that includes a mounting control device that is selectively operable in both a second control mode in which electrical components are mounted jointly on a printed circuit board that is jointly supported by the device.

Supplementary explanation

In addition to the invention described in the claims, there is an invention that is recognized as being capable of being claimed at the time of filing of the present application, and the invention also provides a substrate transfer device and a substrate working system of each aspect described below. It is done. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the technical features described in the present specification and the combinations thereof to those described in the following sections. . In addition, when a plurality of items are described in one section, it is not always necessary to employ the plurality of items together. It is also possible to select and employ only some items.
(1) Each of the two guide rails and two belts guided around each guide rail and arranged in parallel with each other are arranged in parallel with each other. A substrate transfer device including two sets of belt conveyors for supporting and transferring,
Of the four guide rails of the two sets of belt conveyors, two of the four guide rails extending in parallel to each other are the fixed guide rails of each belt conveyor, and the two adjacent ones are the movable guide rails of each belt conveyor. The widths of the two belt conveyors can be changed by approaching and separating each movable guide rail from the fixed guide rail, and one of the two belt conveyors is wider than the other, and the width is A substrate transfer apparatus characterized in that the movable guide rail of the larger belt conveyor is accessible to the fixed guide rail of the narrower belt conveyor beyond the central position between the two fixed guide rails. .
According to this substrate transport apparatus, when the printed circuit board to be transported is relatively small, the widths of the two belt conveyors are matched to the printed circuit board to be transported together, and one of the belt conveyors is stopped. The other belt conveyor can be operated to transport the printed circuit board. Therefore, for example, if this board transport device is employed in a board working system that performs some work on a printed board as will be described later, the work is carried out on the printed board carried in by one belt conveyor. The work efficiency of the substrate working system is improved by letting the other belt conveyor carry out the printed board and carry in the next printed board while the one belt conveyor is stopped. be able to.
(2) The substrate conveying apparatus according to (1), including a same width state realizing device for equalizing the widths of the two sets of belt conveyors.
Although it is possible to convey two types of printed circuit boards alternately by making the widths of the two sets of belt conveyors different from each other, in many cases, the widths of the two sets of belt conveyors are the same and the same types of printed circuit boards are used. Are required to be alternately conveyed. In that case, a device for realizing the same width state is required. The same width state realization device can be configured by two individual width changing devices that can individually change the width of two sets of belt conveyors, but it should be configured by a synchronous width changing device as described in the next section. Is desirable.
(3) The same width state realization device moves each of the movable guide rails of the two sets of belt conveyors synchronously while keeping the distances from the corresponding fixed guide rails equal to each other. The substrate transfer device according to item (2), including a synchronous width changing device that changes the width of the conveyor synchronously.
For example, the synchronous width changing device may be configured by a synchronous control device that operates the driving sources (for example, electric motors) of the individual width changing devices that individually change the widths of the two sets of conveyors in synchronization with each other. (6) The configuration described in the section can also be adopted.
(4) The substrate transfer apparatus according to any one of (1) to (3), including a width-difference state realizing device that makes one of the two belt conveyors wider than the other.
The width difference state realization device can be configured by two individual width changing devices that can individually change the widths of two sets of belt conveyors, but any of the following items (5) to (7) It is desirable to have the configuration described in.
(5) including a width difference state realization device that makes one width of the two sets of belt conveyors wider than the other width, and the width difference state realization device is configured so that each of the two sets of belt conveyors by the synchronous width change device The substrate transfer apparatus according to (4), including a synchronization release device that releases the synchronous movement state of the movable guide rail.
If the synchronous width changing device is operated, the widths of both conveyors can be changed while keeping the widths of the two belt conveyors the same. If the synchronous movement state of the synchronous width changing device is released, one belt can be changed. Only the width of the conveyor can be changed.
(6) The synchronous width changing device includes an individual width changing device for changing the widths of the two sets of belt conveyors, and a connecting device for connecting the individual width changing devices to each other, and the synchronization releasing device is the connecting device. The board transfer device according to item (5), including a connection release device that sets the connection state to a connection release state.
In this way, both the synchronization width changing device and the width difference state realizing device can be realized with a simple configuration.
(7) Each of the individual width changing devices includes two or more feed screws that extend in a direction perpendicular to the longitudinal direction of the movable guide rail, and that are rotatable and immovable in the axial direction. A nut that is screwed and fixed to each of the movable guide rails, and a rotation transmission mechanism that synchronously rotates the two or more feed screws, and the connecting device belongs to the rotation transmission mechanism of one of the individual width changing devices. A clutch disposed between the rotating body and the rotating body belonging to the rotation transmission mechanism of the other individual width changing device, wherein the clutch can be switched between a connected state and a disconnected state; The substrate transfer apparatus according to item (6), including a clutch release device for releasing.
In this way, both the synchronization width changing device and the width difference state realizing device can be realized with a particularly simple configuration.
(8) The width of the two sets of belt conveyors is reduced by operating the synchronous width changing device while keeping the connecting device in a connected state, and then the connection device is brought into a disconnected state, and the individual width is changed. An automatic width change control device that automatically performs width change control for changing only the width of the belt conveyor corresponding to the individual width change device by operating only one of the devices, and the substrate according to (6) or (7) Conveying device.
In this way, it is possible to automatically and easily control both the operation as the synchronous width changing device of the substrate transfer device and the operation as the width difference state realizing device.
(9) The substrate transfer apparatus according to any one of (1) to (8),
A substrate support device for positioning and supporting the printed circuit board conveyed by the substrate conveyance device;
A substrate working system including a working device that performs a predetermined work on a printed circuit board supported by the substrate supporting device.
(10) Further, the apparatus includes a component supply device that selectively supplies a plurality of types of electrical components, and the working device receives the electrical components from the component supply device and is mounted on the printed circuit board supported by the substrate support device. The board working system according to item (9), wherein the board mounting system is a component mounting apparatus.
(11) The electrical component mounting device is
At least two mounting heads;
A first control mode in which the two mounting heads are mounted on the printed circuit boards which are transported by the two sets of belt conveyors and supported by the substrate support device corresponding to the respective belt conveyors, in cooperation with each other. And the printed circuit boards that are transported by the wider belt conveyor of the two sets of belt conveyors and supported by the board support device corresponding to the wider belt conveyor, The electrical component mounting system according to item (10), including a mounting control device that is selectively operable in both of the second control modes for mounting.

Hereinafter, an electrical component mounting system including a substrate transport / support apparatus according to an embodiment of the present invention will be described with reference to the drawings.
Although not shown, the electrical component mounting system 10 is an upstream device provided on the upstream side in the transport direction of a printed wiring board as a printed circuit board, and is a kind of coating system, and pastes on the printed wiring board. A type of board work system together with a screen printing system that prints solder and a reflow system (a system that melts the solder and electrically connects the electrical components to the printed wiring board) as a downstream device provided downstream It constitutes an electrical component assembly line.

  On the base 12 of the electrical component mounting system 10, as shown in FIG. 1, a wiring board conveyor 14, two electrical component supply devices 16 and 18, and electrical component mounting devices 20 and 22 are provided. . The wiring board conveyor 14 includes two main conveyors 24, 26, and one carry-in conveyor 28 and one carry-out conveyor 30. Each of the main conveyors 24 and 26 is provided with a wiring board positioning support device for positioning and supporting the printed wiring board 32, and a conveyance direction of the printed wiring board 32 (hereinafter referred to as a wiring board conveyance direction. The wiring board conveyance direction is shown in FIG. In the horizontal direction, and the wiring board transport direction is taken as the X-axis direction) and in a direction perpendicular to the horizontal plane (taken as the Y-axis direction). The carry-in conveyor 28 is provided on the upstream side of the main conveyors 24 and 26 in the circuit board conveyance direction, and a first shift position formed on the main conveyor 24 and a first shift position formed on the main conveyor 26 by a carry-in conveyor shift device (not shown). It is shifted to 2 shift positions. The carry-in conveyor 28 receives a printed wiring board after screen printing from a screen printing system provided on the upstream side in the wiring board conveyance direction, and carries it into the main conveyor 24 or 26. The main conveyors 24 and 26 will be described later.

The carry-out conveyor 30 is provided on the downstream side of the main conveyors 24 and 26 in the conveyance direction of the printed wiring board 32, and a first shift position formed on the main conveyor 24 and a main conveyor 26 by a carry-out conveyor shift device (not shown). To the second shift position. The carry-out conveyor 30 receives from the main conveyor 24 or 26 the printed wiring board 32 on which electrical components have been mounted, and carries it out to a reflow system provided on the downstream side.
The carry-in conveyor 28 and the carry-out conveyor 30 are each provided with a width changing device, and each transport width can be simultaneously changed to the same size by operating the drive source of the width changing device in synchronization with each other by the control device.

  Each of the electrical component supply devices 16 and 18 includes a plurality of electrical component supply feeders 42 (hereinafter abbreviated as feeders 42) fixed to the feeder support base 40 in a detachable manner. The electric parts supplied by the feeder 42 are held by a carrier tape, and the parts holding tape including the electric parts and the carrier tape are fed by a tape feeder provided in the feeder 42, and the electric parts are one by one. It is sent to the parts supply unit. The plurality of feeders 42 are fixed to the feeder support base 40 in a state where the component supply units are aligned on a straight line parallel to the X-axis direction.

  The electrical component mounting apparatuses 20 and 22 are respectively provided with mounting heads 50 and 52, and X-axis slides 54 and 56 and Y-axis slides 58 and 60, respectively, to move the mounting heads 50 and 52 to arbitrary positions in a horizontal plane. And moving devices 62 and 64. The mounting heads 50 and 52 are configured in the same manner, and the horizontal movement devices 62 and 64 are configured in the same manner. The mounting head 50 and the horizontal movement device 62 will be described representatively.

  The Y-axis slide 58 is provided on the base 12 so as to be movable in the Y-axis direction, and the X-axis slide 54 is provided on the Y-axis slide 58 so as to be movable in the X-axis direction. The Y-axis slide 58 is driven by a Y-axis slide moving device including a motion conversion device that uses a servo motor 66 (see FIG. 5) as a drive source and converts the rotation of the servo motor 66 into a linear motion and transmits the linear motion to the Y-axis slide 58. It is moved in the axial direction. Similarly, the X-axis slide 54 is moved in the X-axis direction by an X-axis slide moving device including a motion conversion device using a servo motor 68 (see FIG. 5) as a drive source.

  The mounting head 50 has an intermittent rotating body (not shown) attached to the X-axis slide 54 so as to be intermittently rotatable around a vertical axis. The intermittently rotating body is rotated at an arbitrary angle in both forward and reverse directions by a rotary drive device using a servo motor 70 (see FIG. 5) as a drive source. The servo motors 66, 68, and 70 are electric rotary motors that are a kind of electric motor, and are capable of controlling the rotation angle and the rotation speed with high accuracy. The intermittent rotating body is provided with a plurality of component suction nozzles, which are holders, at equiangular intervals. Each of these component suction nozzles is held by the intermittent rotating body via a holder holder (not shown) so that the intermittent rotating body can move in a direction parallel to the rotation axis of the intermittent rotating body and can rotate about its own axis. Yes. The component suction nozzle can suck the electrical component by, for example, a negative pressure.

  The main conveyors 24 and 26 will be described. As shown in FIGS. 2 and 3, a conveyor support base 100, which is a kind of stationary member, is fixed to a portion of the base 12 between the carry-in conveyor 28 and the carry-out conveyor 30. The conveyor support base 100 has a size corresponding to two main conveyors in the Y-axis direction, and linear guide rails 102 serving as guide members are provided on both ends of the conveyor support base 100 parallel to the Y-axis direction. It is fixed parallel to the axial direction.

  The main conveyors 24 and 26 have fixed guide rails 110 and 111 and movable guide rails 112 and 113 respectively extending in parallel with each other. The two guide rails farthest from each other are the fixed guide rails 110 and 111, and the two guide rails adjacent to each other are the movable guide rails 112 and 113. Each of these guide rails 110, 111, 112, 113 includes a pair of leg portions 114 and a connecting portion 116 that connects the upper ends of the leg portions 114, as representatively shown in FIG. 3. The fixed guide rail 110 is fixed to the conveyor support 100 at a pair of legs 114. A guide block 118 as a guided member is fixed to each of the pair of leg portions 114 of the movable guide rails 112 and 113, and is fitted to the guide rail 102 so as to be movable via a ball (not shown). The block 118 and the guide rail 102 constitute a linear ball guide which is a kind of guide device. The conveyance width which is the width between the fixed guide rails 110 and 111 and the movable guide rails 112 and 113 can be changed by a width changing device which will be described in detail later.

  On the mutually facing surfaces of the connecting portions 116 of the fixed guide rails 110 and 111 and the movable guide rails 112 and 113, pulleys (not shown) can rotate at a plurality of locations, including both ends separated in the wiring board conveyance direction. While being attached, an endless conveyor belt (not shown) is wound around. These conveyor belts are rotated by rotating the spline shaft 120 rotatably supported by the fixed guide rails 110 and 111 and the movable guide rails 112 and 113, respectively.

  The spline shaft 120 of the main conveyor 24 is rotatably supported by the fixed guide rail 110, and a spline cylinder 122 attached to the movable guide rail 112 so as to be rotatable and non-movable in the axial direction is relatively non-rotatable and in the axial direction. The spline shaft 120 and the spline cylinder 122 constitute a ball spline. A pulley (not shown) is integrally provided on the end portion of the spline shaft 120 on the fixed guide rail 110 side and the spline cylinder 122, and the conveyor belt is wound around the pulley.

  As with the main conveyor 24, the spline shaft 120 of the main conveyor 26 is rotatably supported by a fixed guide rail 111, and a spline cylinder 122 attached to the movable guide rail 113 so as to be rotatable and immovable in the axial direction is relatively rotated. Impossible and fitted so as to be movable in the axial direction. A pulley (not shown) is integrally provided on the end of the spline shaft 120 on the fixed guide rail 111 side and the spline cylinder 122, and a conveyor belt is wound around the pulley. The spline shaft 120 provided on the main conveyor 24 and the spline shaft 120 provided on the main conveyor 26 are connected to each other and rotated as an integral unit. A sprocket 126 is fixed to the end of the spline shaft 120 on the fixed guide rail 111 side, and a chain (not shown) is connected to the sprocket 132 fixed to the output shaft of the wiring board transport motor 130 as a drive source attached to the support member 128. Are connected by The wiring board conveyance motor 130 is a speed control motor that is a type of AC three-phase motor that is an electric rotary motor that is a type of electric motor.

  Therefore, when the wiring board conveyance motor 130 is activated, the spline shafts 120 of the main conveyors 24 and 26 are integrally rotated, and the conveyor belt is moved by the rotation of the pulley, so that the printed wiring board 32 is sent. The movement of the conveyor belt is guided by fixed belt guides to the fixed guide rails 110 and 111 and the movable guide rails 112 and 113. Further, the movement of the printed wiring board 32 is guided from both sides in the width direction by the vertical guide surfaces of the long-shaped guide members (not shown) fixed to the fixed guide rails 110 and 111 and the movable guide rails 112 and 113, respectively. The The fixed guide rails 110 and 111 and the movable guide rails 112 and 113 are integrally provided with pressing portions 134 and 136 that extend onto the conveyor belt to prevent the printed wiring board 32 from being lifted from the conveyor belt. There is a gap larger than the thickness of the printed wiring board 32 between the holding portions 134 and 136 and the upper surface of the conveyor belt, and between the printed wiring board 32 placed on the conveyor belt and the holding portions 134 and 136. There is a slight gap. When the conveyance width is changed, the spline cylinder 122 moves in the axial direction with respect to the spline shaft 120. However, the spline cylinder 122 is kept in a spline-fitted state, and even if the conveyance width is changed, the wiring board conveyance motor 130 rotates on the pulley. Then, the printed wiring board 32 is conveyed.

  Further, as shown in FIG. 3, a holding member 140 is attached to the surfaces of the fixed guide rails 110 and 111 and the movable guide rails 112 and 113 facing each other so as to be movable up and down. Engaging members 142 (only one engaging member 142 is shown in FIG. 3) project downward from both ends of the lower surface of the holding member 140 which are separated in the longitudinal direction. The holding member 140 is urged downward by a compression coil spring 144 as an elastic member, which is a kind of urging means disposed between the connecting portions 116, and the protrusion is fixed to the holding member 140. In the member (not shown), the upper end surface is always below the conveying surface of the printed wiring board 32 (the surface including the upper surface of the upper horizontal portion of the conveyor belt disposed in an annular shape), and the printed wiring board 32 Are retracted to a retracted position where they do not interfere with each other.

  On the conveyor support table 100, a lifting platform 150 and a lifting platform lifting device 152 are also provided. In FIG. 3, detailed illustration of the lifting platform 150 and the lifting platform lifting device 152 is omitted. The distance between the pair of legs 114 of the movable guide rail 112 is made larger than the dimension of the lifting platform 150 in the X-axis direction so that it does not interfere with the lifting platform 150 when the conveyance width is changed. Further, a wiring board support member as a substrate support member is provided on the lift table 150 so that the position thereof can be adjusted.

  When the lifting platform 150 is raised, the wiring board support member supports the printed wiring board 32 from below on the support surface. The wiring board support member can adsorb the printed wiring board 32 by negative pressure, for example. Further, the lifting platform 150 engages with the engaging member 142 and raises the holding member 140 and thus the protruding member against the urging force of the compression coil spring 144 to raise the printed wiring board 32 from the conveyor belt. The printed wiring board 32 is supported from below by a wiring board support member, is lifted from the conveyor belt, and is sandwiched between the protruding member and the pressing portions 134 and 136, and the warp upward or downward is corrected. It is fixed to the conveyors 24 and 26. When the printed wiring board 32 is small, the wiring board support member may be omitted.

  A deceleration start position sensor 160, a wiring board arrival confirmation sensor 162, and a wiring board stop device 164 (see FIG. 5 respectively) are provided on the downstream side of the main conveyors 24 and 26 in the wiring board conveyance direction. Yes. The deceleration start position sensor 160 and the wiring board arrival confirmation sensor 162 are each composed of a reflection type photoelectric sensor having a light emitting part and a light receiving part, and are reflected to the deceleration starting position of the printed wiring board 32 by reflection of light from the printed wiring board 32. And arrival at the arrival confirmation position of the wiring board are detected. The elevator platform 150 is provided with a notch 166 so that light strikes the printed wiring board 32. The deceleration start position sensor 160 and the wiring board arrival confirmation sensor 162 are not limited to the reflective photoelectric sensor, but may be configured by a transmissive photoelectric sensor, a proximity switch, a limit switch, or the like.

  Although not shown, the wiring board stop device 164 is provided on the downstream side of both the sensors 160 and 162, and includes a stopper member and a lifting device that lifts and lowers the stopper member. The drive source of the lifting device can be constituted by a fluid pressure cylinder such as an air cylinder. The stopper member is moved upward and downward by the lifting device to an operating position where the printed wiring board 32 stops moving and to a non-operating position which is retracted below the conveying surface and allows the printed wiring board 32 to pass. Be made.

  One end of a ball screw 170 as a feed screw is attached to each of the pair of leg portions 114 of the fixed guide rail 110 of the main conveyor 24 so as to be rotatable and immovable in the axial direction. Each of the pair of ball screws 170 is screwed into nuts 172 fixed to both ends of the movable guide rail 112 of the main conveyor 24 in the direction parallel to the wiring board conveyance direction, and protrudes from the movable guide rail 112. The other end portion is supported by the fixed guide rail 111 of the main conveyor 26 so as to be rotatable and immovable in the axial direction.

  As shown in FIGS. 2 and 3, sprockets 176 are fixed to projecting ends of the pair of ball screws 170 from the fixed guide rail 110 of the main conveyor 24. A chain 184 is wound around these sprockets 176, a plurality of sprockets 178 rotatably attached to the fixed guide rail 110, and a sprocket 182 rotatably supported by the bracket 180. Reference numeral 186 denotes a tension sprocket. The chain 184 is connected to a sprocket 190 fixed to the output shaft of the servo motor 188. The servo motor 188 is an electric rotary motor as an electric motor which is a kind of drive source, and is a motor capable of controlling the rotation angle and the rotation speed with high accuracy.

  One end of a ball screw 200 as a feed screw is attached to each of the pair of legs 114 of the fixed guide rail 111 of the main conveyor 26 so as to be rotatable and immovable in the axial direction. Each of the pair of ball screws 200 is screwed into nuts 202 fixed to both ends of the movable guide rail 113 of the main conveyor 26 in the direction parallel to the wiring board conveyance direction, and protrudes from the movable guide rail 113. The other end portion is supported by the fixed guide rail 110 of the main conveyor 24 so as to be rotatable and immovable in the axial direction.

  Sprockets 206 are fixed to projecting ends of the pair of ball screws 200 from the fixed guide rail 111 of the main conveyor 26, respectively. A chain 214 is wound around a sprocket 206, a plurality of sprockets (not shown) rotatably attached to the fixed guide rail 111, and a sprocket 212 rotatably supported on a bracket 210 via a rotation shaft described later. ing. Reference numeral 216 denotes a tension sprocket.

  The chain 214 is connected to the chain 184 of the main conveyor 24 via the connection / disconnection device 230. The connection / disconnection device 230 is provided at a position separated from the guide rails 110 to 113 in the wiring board conveyance direction, extends parallel to the ball screws 170 and 200, and rotates to the brackets 180 and 210 fixed to the base 12. A rotating shaft 234 and a clutch 236 that are supported are provided. A sprocket 212 around which a chain 214 is wound is attached to one end of the rotating shaft 234 in the axial direction so as to be integrally rotatable, and a sprocket 182 around which a chain 184 is wound is attached to the other end. They are connected via a clutch 236. The clutch 236 can be switched between a contact state and a disengagement state by a manual operation. In the present embodiment, the clutch 236 is an electromagnetic clutch. Since the electromagnetic clutch is a known one, detailed illustration and description thereof are omitted. However, the rotation of the clutch member that rotates together with the sprocket 182 is transmitted to the clutch member that rotates together with the rotating shaft 234 by controlling the current supply. It can be switched between a contact state and a disconnected state where it is not transmitted. In the present embodiment, the electromagnetic clutch is brought into the engaged state when the current is interrupted, and is brought into the disconnected state when the current is supplied, but the reverse is also possible. Since the entire electromagnetic clutch rotates, current is supplied through a slip ring (not shown).

  The contact state of the clutch 236 corresponds to the connection state of the connection / disconnection device 230, and the disengagement state of the electromagnetic clutch corresponds to the connection release state of the connection / disconnection device 230. In the connected state, when the chain 184 is rotated by the activation of the servo motor 188, the chain 214 is rotated in synchronism with it, and the ball screw 170 and the ball screw 200 are rotated in synchronization with each other of the main conveyors 24, 26. The movable guide rails 112 and 113 are moved while keeping the distance from the fixed guide rails 110 and 111 equal to each other, and are moved toward and away from the fixed guide rails 110 and 111 synchronously. As a result, the conveying widths of the main conveyors 24 and 26 are simultaneously changed to the same size. In the disconnected state, the circulation of the chain 184 is not transmitted to the chain 204, only the ball screw 170 is rotated, and only the movable guide rail 112 of the main conveyor 24 approaches and separates from the fixed guide rail 110. Be made.

  The electrical component mounting system 10 is controlled by a control device 250 shown in FIG. The control device 250 is mainly composed of a computer 260 having a PU (processing unit) 252, a ROM 254, a RAM 256 and a bus 258 for connecting them. An input interface 262 is connected to the bus 258, and a deceleration start sensor 160, a wiring board arrival confirmation sensor 162, and the like are connected to the bus 258. An output interface 266 is also connected to the bus 258, and the servo motors 66, 68, 70, the lifting platform lifting device 152, and the wiring board stop through the drive circuits 270, 271, 272, 273, 274, 275, 276. A device 164, a servo motor 188, a clutch 236, and the like are connected. The ROM 254 stores various programs necessary for supplying, sucking and mounting electrical components, and loading and unloading printed wiring boards. Although not shown in FIG. 5, the control device 250 controls the carry-in conveyor shift device, the carry-out conveyor shift device, the carry-in conveyor 28, the carry-out conveyor 30, the tape feeding device of the feeder 42, and the like.

Next, the operation will be described.
When the printed wiring board 32 to be conveyed is relatively small, the conveying widths of the main conveyors 24 and 26 are matched to the printed wiring board 32 to be conveyed together. The clutch 236 is in the connected state, and the conveyance widths of the main conveyors 24 and 26 are changed synchronously while maintaining the same width based on the size of the printed wiring board 32 to be conveyed. Further, the transport widths of the carry-in conveyor 28 and the carry-out conveyor 30 are also changed in synchronization with the same width as the main conveyors 24 and 26 by the width changing device described above. As shown in FIG. 2, the two electrical component mounting apparatuses 20 and 22 alternately mount electrical components on a printed wiring board 32 that is positioned and supported by either the main conveyor 24 or the main conveyor 26. With respect to one printed wiring board 32, all the electrical components scheduled to be mounted in the electrical component mounting system 10 are mounted together by the electrical component mounting apparatuses 20 and 22. This is the first control mode of the electrical component mounting apparatuses 20 and 22. Among the main conveyors 24 and 26, while the electrical components are mounted on the printed wiring board 32 that is positioned and supported by one main conveyor, the other main conveyor carries out, carries in, and supports the positioning of the printed wiring board 32. The printed wiring board 32 that has been carried in is made to wait on the main conveyor in preparation for mounting of electrical components. When the mounting of the electrical components on the printed wiring board 32 supported by one main conveyor is completed, the printed wiring board 32 is carried out by the carry-out conveyor 30 and the printed wiring that is kept waiting in the other main conveyor. The mounting of the electrical components on the plate 32 is started.

The loading, positioning support, and unloading of the printed wiring board 32 will be described. It is assumed that mounting on the printed wiring board 32 has already started and is in a steady mounting state.
The printed wiring board 32 is carried into the carry-in conveyor 28 from a screen printing system provided on the upstream side of the electrical component mounting system 10. This carry-in is performed in a state where the carry-in conveyor 28 is located at the first shift position. If the carry-in conveyor 28 carries the printed wiring board 32 into the main conveyor 24, the carry-in conveyor 28 is left in the first shift position.

  If the printed wiring board 32 on the main conveyor 24 is carried out to the carry-out conveyor 30 and the printed wiring board 32 can be carried into the main conveyor 24, the carry-in conveyor 28 carries the printed wiring board 32 into the main conveyor 24. Whether or not the printed circuit board 32 can be carried into the main conveyor 24 can be determined, for example, by whether or not the printed circuit board arrival confirmation sensor 162 detects the printed circuit board 32. When the printed wiring board 32 is carried into the main conveyor 24, it is determined whether or not the printed wiring board 32 has been carried into the main conveyor 24 based on the detection signal of the wiring board arrival confirmation sensor 162. If the wiring board arrival confirmation sensor 162 does not detect the printed wiring board 32, it can be seen that there is no printed wiring board 32 on the main conveyor 24 and the printed wiring board 32 can be carried into the main conveyor 24.

  At the time of carry-in, the wiring board transfer motor of the carry-in conveyor 28 and the wiring board transfer motor 130 of the main conveyors 24 and 26 are activated, and the conveyor belt and the like are moved to carry the printed wiring board 32 into the main conveyor 24. At this time, the stopper member of the wiring board stop device 164 provided on the main conveyor 24 is moved to the operating position. If the printed wiring board 32 is carried in and detected by the deceleration start position sensor 160, the conveyance speed is reduced, and if detected by the wiring board arrival confirmation sensor 162, the wiring board conveyance motor 130 is stopped. At this time, the printed wiring board 32 comes into contact with the stopper member to stop the movement, and the printed wiring board 32 comes into contact with the stopper member with little impact by the reduction of the conveyance speed.

  After the circuit board conveyance motor 130 is stopped, the lifting platform 150 is raised, the circuit board support member supports the printed circuit board 32 from below, and the protruding member lifts and holds the circuit board 32 from the conveyor belt. Press against the parts 134 and 136. In this way, the printed wiring board 32 is placed in a standby state in preparation for mounting of electrical components while being positioned and supported by the main conveyor 24. Therefore, when the mounting of the electrical component on the printed wiring board 32 that is positioned and supported by the main conveyor 26 is completed, the electrical component mounting device on which the electrical component was last mounted is retracted (moved to the electrical component supply device). At the same time, the other electrical component mounting apparatus is moved onto the printed wiring board 32 on standby, and mounting of the electrical component is started. The time required for the replacement of the printed wiring board 32 becomes substantially zero, and the mounting of the electrical components on the printed wiring board 32 is efficiently performed.

  The wiring board conveyance motor 130 is common to the two main conveyors 24 and 26, and the respective conveyor belts of the main conveyors 24 and 26 are moved by the activation thereof. Since 32 is lifted from the conveyor belt, it is not sent by the movement of the conveyor belt, and the mounting of the electrical parts of the printed wiring board 32 and the loading and unloading of the printed wiring board 32 can be performed in parallel. it can.

  When the mounting of the electrical components is finished, the holding of the printed wiring board 32 is released. After the lifting platform 150 is lowered and the printed wiring board 32 is placed on the conveyor belt, the wiring board transport motor of the carry-out conveyor 30 and the wiring board transport motor 130 of the main conveyors 24 and 26 are activated, and printing is performed. The wiring board 32 is carried out to the carry-out conveyor 30. The carry-out conveyor 30 is shifted to the first shift position when the printed wiring board 32 is carried out from the main conveyor 24. Moreover, the stopper member of the wiring board stop device 164 is moved to the non-operation position. The printed wiring board 32 is carried out to the carry-out conveyor 30 and is made to wait on the carry-out conveyor 30. If delivery to the reflow system is possible immediately, the printed wiring board 32 is delivered to the reflow system as it is.

  The carry-in conveyor 28 delivers the next printed wiring board 32 from the screen printing system after delivering the printed wiring board 32 to the main conveyor 24. And it is made to shift to the 2nd shift position, and is made to stand by in preparation for carrying in of printed wiring board 32 to main conveyor 26. After the electrical components are mounted on the printed wiring board 32 on the main conveyor 26 and the printed wiring board 32 is unloaded, the printed wiring board 32 is loaded from the loading conveyor 28 to the main conveyor 26.

  The carry-out conveyor 30 transfers the printed wiring board 32 carried out from the main conveyor 24 to the reflow system provided on the downstream side, and then is shifted to the second shift position to wait for the printed wiring board 32 to be carried out. It is done. The carry-out conveyor 30 is shifted to the first shift position after receiving the printed wiring board 32 and delivers the printed wiring board 32 to the reflow system.

  After the printed wiring board 32 is carried from the carry-in conveyor 28 to the main conveyor 26, the printed wiring board 32 is positioned and supported in the main conveyor 26 in the same manner as in the main conveyor 24, and is put on standby in preparation for mounting of electrical components. After the electrical components are mounted on the printed wiring board 32 that is positioned and supported by the main conveyor 24, the mounting of the electrical components to the printed wiring board 32 that is positioned and supported by the main conveyor 26 is started. It is carried out to.

  When the type of the printed wiring board 32 changes, for example, when the large printed wiring board 32 shown in FIG. 4 is conveyed and positioned and supported, the conveying widths of the main conveyors 24 and 26 are changed to different states. In a state where none of the conveyors 24 and 26 support the printed wiring board 32 and the clutch 236 is in the connected state, the servo motor 188 is activated so that the conveyance width of the conveyors 24 and 26 is reduced. The ball screws 170 and 200 are rotated by rotating the chains 184 and 214. As a result, the movable guide rails 112 and 113 of the conveyors 24 and 26 are brought close to the fixed guide rails 110 and 111 synchronously, and the conveyance width is reduced while maintaining the same width. Next, the clutch 236 is brought into the disconnected state and switched to a state where the drive of the servo motor 188 is transmitted only to the main conveyor 24. Then, the chain 184 is rotated in the opposite direction to that when the width is reduced, and the ball screw 170 is rotated in the opposite direction, whereby the movable guide rail 112 is separated from the fixed guide rail 110, and the fixed guide rail 110, 111 is moved in a direction approaching the movable guide rail 113 of the main conveyor 26 beyond the central position between the conveyors 111 (which is also the boundary between the elevators 150 of the conveyors 24 and 26). In addition, the conveyance width of the carry-in conveyor 28 and the carry-out conveyor 30 is also changed to the same size simultaneously with the change of the conveyance width of the main conveyor 24.

  In this way, the large printed board 1 32 is carried from the carry-in conveyor 28 to the main conveyor 24 whose conveyance width is widened. The carrying-in, positioning support, carrying-out, etc. of the printed wiring board 32 are the same as in the case of the same width state described above, and the description thereof is omitted. However, in the case of this width difference state, the two lifting platforms 150 are lifted together to support the printed wiring board 32 from below. Depending on the size of the printed wiring board 32, only the lifting platform 150 on the main conveyor 24 side may be raised. Then, the two electrical component mounting apparatuses 20 and 22 jointly mount the electrical component on the printed wiring board 32 that is positioned and supported. This is the second control mode of the electrical component mounting apparatuses 20 and 22. The electrical component mounting apparatuses 20 and 22 can selectively operate in the first control mode and the second control mode.

  As is clear from the above description, the substrate transfer device in the present embodiment includes the main conveyors 24 and 26, and also includes a lifting platform 150 including a wiring board support member, a lifting platform lifting device 152, and a substrate stopping device. 164 and the like constitute a substrate support device together with the fixed guide rails 110 and 111 and the movable guide rails 112 and 113, and the substrate transport device and the substrate support device constitute a substrate transport / support device. In addition, the electrical component mounting devices 20 and 22 constitute a working device. The sprockets 176, 178, 182, 190 and the chain 184 as rotating bodies, and the sprockets 206, 212 and the chain 214 as rotating bodies respectively constitute a rotation transmission mechanism, and the ball screw 170, nut 172 and the rotation transmission mechanism described above. The ball screw 200, the nut 202, and the rotation transmission mechanism constitute an individual width changing device. Further, the individual width changing device and the connection / disconnection device 230 operate as a synchronous width changing device or a same width state realizing device in the connected state, and operate as a different width state realizing device in the connection released state. . The connection / connection release device 230 operates as a connection device in the connected state, and operates as a clutch release device or a connection release device (synchronization release device) in the connection released state.

  According to the present embodiment, when the printed wiring board 32 to be transported is relatively small, the two main conveyors 24 and 26 are made to have the same width in accordance with the printed wiring board 32, and electrical components are mounted on one conveyor. In addition, the printed wiring board 32 can be carried in, positioned, and carried out on the other conveyor, thereby improving the work efficiency. In the case of a large printed wiring board 32, the width of the main conveyor 24 is made wider than the width of the main conveyor 26 so that the large printed wiring board 32 can also be conveyed and positioned and supported. Therefore, it is not necessary to make the widths of the main conveyors 24 and 26 wider corresponding to the largest printed wiring board 32 to be transported, and thus the size of the electrical component mounting system 10 can be avoided. . Further, the same width state and the different width state of the two sets of conveyors can be switched with a simple configuration such as the clutch 236. Further, since the clutch 236 can be automatically switched between the connected state and the disconnected state, it is possible to respond quickly according to the size of the printed wiring board 32 to be transported, and the work efficiency is improved.

In the present embodiment, the carry-in conveyor 28, the main conveyor 24, and the carry-out conveyor 30 are each provided with a drive source of a separate width changing device and controlled so that the width is changed synchronously. The main conveyor 24 and the carry-out conveyor 30 may be connected by a chain or the like, and a common drive source may be operated to change the conveyance width in synchronization.
In the present embodiment, servo motors 66 and 68, which are electric rotary motors as a drive source, are used for various operations such as movement of the mounting heads 50 and 52. In addition to the motor, an electric rotary motor with high rotational angle control accuracy, for example, a step motor may be used. Moreover, you may use the linear motor which is a kind of electric motor as a drive source.
In addition to the component mounting system, the present invention can also be applied to a substrate working system such as an adhesive application system and a circuit board inspection system.

  The embodiment of the present invention has been described in detail above, but this is only an example, and the present invention is not limited to the above-mentioned [Problems to be Solved, Problem Solving Means and Effects] and [Supplementary Explanation of the Invention]. In addition to the embodiments described in (1), the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art.

It is a top view which shows a component mounting system provided with the board | substrate conveyance and support apparatus which is one Embodiment of this invention. It is a top view which shows the main conveyor which comprises a board | substrate conveyance and support apparatus. It is a front view of the main conveyor. It is a top view which shows another operation state of the said main conveyor. It is a block diagram which shows the part deeply related to this invention among the control apparatuses which control the said component mounting system.

Explanation of symbols

10: Electrical component mounting system 20, 22: Electrical component mounting device 24, 26: Main conveyor 32: Printed wiring board 50, 52: Mounting head 110, 111: Fixed guide rail 112, 113: Movable guide rail 150: Lift platform 152 : Lifting platform lifting device 164: Substrate stopping device 170, 200: Ball screw 172, 202: Nut 176, 178, 182, 190, 206, 212: Sprocket 184, 214: Chain 230: Connection / disconnection device 234: Rotating shaft 236: Clutch 250: Control device

Claims (2)

Two guide rails and two belts guided around each guide rail, and the distance between the two belts is changed by the approach and separation of the two guide rails. A belt conveyor with variable width that supports and conveys both edges of the printed circuit board with different widths,
A substrate transporting / supporting device including a substrate supporting device for lifting and supporting the printed circuit board supported by the two belts from below,
Two sets of the belt conveyors are arranged in parallel with each other, and one guide rail of the two sets of belt conveyors can be moved beyond the central position between the two sets of belt conveyors to the area of the other belt conveyor. And one substrate support device is provided for each of the two sets of belt conveyors, and one of the two sets of belt conveyors is widened beyond the central position, The two board support devices provided corresponding to the two sets of belt conveyors are configured to support the printed board conveyed by the widened belt conveyor in cooperation with each other. Substrate transport / support device. A substrate carrying / supporting device according to claim 1;
Two sets of component supply devices that are provided corresponding to each of the two sets of belt conveyors and selectively supply a plurality of types of electrical components;
An electrical component mounting device that mounts electrical components supplied by the two sets of component supply devices on a printed circuit board supported by the substrate support device, the electrical component mounting device comprising:
At least two mounting heads;
A first control mode in which the two mounting heads are mounted on the printed circuit boards which are transported by the two sets of belt conveyors and supported by the substrate support device corresponding to the respective belt conveyors, in cooperation with each other. In addition, the electric components are mounted on the printed circuit boards which are conveyed by the belt conveyor whose width is widened beyond the central position of the two sets of belt conveyors and which are jointly supported by the two substrate support devices. A mounting control device selectively operable in both of the second control mode and the electrical component mounting system.

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