JP4510565B2 - Conveying apparatus, surface mounting machine, solder coating apparatus, printed wiring board inspection apparatus, and printed wiring board conveying method - Google Patents

Description

  The present invention relates to a conveying device that conveys a printed wiring board to a predetermined stop position by a conveyor, a surface mounter, a solder coating device, a printed wiring board inspection device, and a printed wiring board conveying method.

  Conventionally, as a transport device for transporting a printed wiring board, for example, there is one disclosed in Patent Document 1. The transport device disclosed in Patent Document 1 is mounted on a surface mounting machine, and transports a printed wiring board from a carry-in entrance to a component mounting position by a conveyor having a transport belt composed of an endless belt. The conveyance belts are provided on both the left and right sides of the conveyance path, and are driven to synchronize with each other by a driving device.

  This conveyance device includes a stopper for each conveyance belt in order to stop the printed wiring board at a predetermined component mounting position. The printed wiring board stopped at the component mounting position is imaged from above by the board recognition camera of the surface mounter on the positioning mark provided on the upper surface thereof. For this reason, the printed wiring board is stopped at the correct position by the stopper so that the positioning mark is located within a range that can be imaged by the camera.

The stopper is configured to reciprocate between an ascending position that blocks a conveying path through which the printed wiring board is conveyed and a descending position that retreats from the conveying path. That is, when the stopper is positioned at the raised position, the printed wiring board conveyed by the conveyor comes into contact with the stopper. When the printed wiring board hits the stopper in this manner, the further advancement is restricted, and when the stopper moves to the lowered position, the restriction is released and the printed wiring board is conveyed downstream.
In addition, the applicant could not find any prior art documents closely related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in the present specification. .
JP 2003-273591 A (page 5-7, FIG. 2)

  In the conventional conveying apparatus configured as described above, the printed wiring board is suddenly stopped by contacting the stopper. When the transport device transports the printed wiring board on which the mounting component has already been transferred in the previous process due to the impact generated at the time of the contact, the mounting component moves from the mounting position due to inertia at the time of stoppage. There was a problem that sometimes. This is because the mounting component is only attached on the printed wiring board by the adhesive force of the cream solder applied on the printed wiring board.

  In addition, since the printed wiring board collides with the stopper every time, the conventional conveying device has a problem that the impacted portion of the stopper is worn due to long-term use, and the stop position of the printed wiring board changes. . In order to solve such a problem, it is conceivable to reduce the conveyance speed of the printed wiring board. However, it is necessary to avoid taking a long time for conveyance because productivity is lowered.

  Further, since the conventional transport device cannot change the position of the stopper, the transport direction of the printed wiring board cannot be changed. For this reason, for example, a surface mounter equipped with this transfer device has a problem that it is restricted in layout when connecting another device upstream or downstream in the transfer direction. In order to solve such a problem, it is conceivable to newly install a stopper on the opposite side of the transport direction. However, this type of stopper must be supported by strong parts such as a conveyor frame in order to receive the inertial force of the printed wiring board. It is difficult to newly install the device.

  The present invention has been made to solve such a problem, and stops a printed wiring board without applying an impact force, and can easily change the transport direction, a surface mounter, and a solder. An object is to provide a coating apparatus.

In order to achieve this object, a transport device according to the present invention detects a position of a transport belt driving motor that rotates a transport belt of the conveyor and a position of the printed circuit board in a transport device that transports a printed circuit board by a conveyor. a sensor for, and a controller for controlling the operation of the conveyor based on a detection result of the sensor, the controller is detected the front edge of the printed circuit board by said sensor, said to a predetermined deceleration start position a first conveyor control means for decelerating the conveying speed of the conveyor that the printed wiring board is conveyed after detecting the first detection by the sensor, detected by the second detection of the printed wiring board by the sensor low distance between the position and the target stop position of the printed wiring board after deceleration And Bei give a second conveyor control means for conveying the printed wiring board from the detected position after deceleration at a constant transport speed, the first conveyor control means, said sensor subjected to the first detection The second sensor detects the second detection at the rear edge of the printed wiring board, and the second conveyor control means detects the speed of the printed wiring board after the deceleration detected by the second detection. Position setting means for setting a position as a starting point; integrating means for integrating the rotation speed of the conveyor belt driving motor from the starting point; an integrated value of the integrating means; and a target stop position of the printed wiring board from the starting point; Is compared with a target value made up of the number of rotations of the conveyor belt drive motor corresponding to the distance, and the conveyor belt drive motor is stopped when the integrated value reaches the target value. In which and a calculated value determining means.

According to a second aspect of the present invention, there is provided a transport device that transports a printed wiring board by a conveyor, a transport belt driving motor that rotates the transport belt of the conveyor, and a sensor that detects a position of the printed wiring board. And a controller for controlling the operation of the conveyor based on the detection result of the sensor, the controller detecting for the first time by the sensor that the printed wiring board has been conveyed to a predetermined deceleration start position. First conveyor control means for decelerating the conveying speed of the conveyor after detection by the position, and the position and the target stop position of the printed wiring board after deceleration detected by the second detection of the printed wiring board by the sensor The printed wiring board is transported from the detection position after being decelerated at a low speed and a constant transport speed by a distance between And a second conveyor control means for, by disposing the sensor to the deceleration start position, the first conveyor control means, said conveyor speed reduction reverses the conveyor belt drive motor after stopping, the sensor comprising a conveyor reversing means for stopping the conveyor when the printed circuit board is detected by the second conveyor control means, the position of the printed wiring board in which the conveyor reversing means is stopped in reverse stroke said conveyor in which it is provided a position setting means for setting the position of the printed wiring board according to the second detection.

According to a third aspect of the present invention, there is provided a transport device that transports a printed wiring board by a conveyor, a transport belt driving motor that rotates the transport belt of the conveyor, and a sensor that detects a position of the printed wiring board. And a controller for controlling the operation of the conveyor based on the detection result of the sensor, the controller detecting for the first time by the sensor that the printed wiring board has been conveyed to a predetermined deceleration start position. First conveyor control means for decelerating the conveying speed of the conveyor after detection by the position, and the position and the target stop position of the printed wiring board after deceleration detected by the second detection of the printed wiring board by the sensor A second link that conveys the printed wiring board from the detection position after deceleration at a low speed by a distance between A bare control unit, the sensor includes a first sensor provided in the deceleration start position, consists of a second sensor disposed at the conveying direction downstream side of the deceleration start position, the first conveyor control means comprises a first detecting means for performing first detected by the first sensor, and a transport speed setting means for holding the conveyor speed constant after the conveying speed is decelerated to a predetermined low speed, the the second conveyor control means includes a second detecting means for performing a second detection by the second sensor in a state where the conveyance speed is kept constant by the transport speed setting means, said second detecting means The printed wiring board is conveyed by a time measuring means for starting time measurement from the time when passage of the printed wiring board is detected by the above and a conveying distance for positioning between the position of the second sensor and the target stop position. A stop time at which the conveyor belt driving motor is stopped when the elapsed time reaches the target time. Discriminating means .

According to a fourth aspect of the present invention, there is provided a surface mounting machine that conveys a printed wiring board to a component mounting portion by the conveying device according to any one of the first to third aspects.
According to a fifth aspect of the present invention, there is provided a solder coating apparatus for transporting a printed wiring board to a solder coating section by the transport apparatus according to any one of the first to third aspects.

  According to a sixth aspect of the present invention, there is provided an inspection apparatus for a printed wiring board, wherein the printed wiring board conveyed by the conveying apparatus according to any one of the first to third aspects is imaged by a camera from above. It is.

According to a seventh aspect of the present invention, there is provided a printed wiring board conveying method in which the printed wiring board is conveyed by a conveyor, the conveying belt of the conveyor is rotated by a conveying belt driving motor , and the printed wiring board is conveyed. slow down the transport speed after the wiring board was detected by first detection by the sensor, the rear edge of the printed wiring board after deceleration, the second detection by the same sensor as the sensor subjected to the first detection The position of the printed wiring board after deceleration detected by the second detection is set as a starting point, and then the printed wiring board is moved from the starting point toward the target stop position at a low and constant conveyance speed. The integrated value of the number of rotations of the conveyance belt driving motor being conveyed and the target stop position of the printed wiring board from the start point Comparing the target value consisting of the rotational speed of the conveyor belt drive motor corresponding to the distance between, carried out by the stopping the conveyor belt drive motor when the integrated value reaches the target value.

According to the present invention, since the printed wiring board is stopped by temporarily stopping the conveyor, the impact is not applied to the printed wiring board. For this reason, when the printed wiring board on which the mounting component is mounted is transported by the transport device according to the present invention, the mounting component does not move due to inertia when the printed wiring board is stopped, and is always correct. It can be stopped at the mounting position.
In this transport device, the position of the printed wiring board is detected with high accuracy in a state where the transport speed of the conveyor is reduced, and the target transport distance is determined based on this position. It is possible to stop at the target stop position with accuracy.

  Moreover, this conveyance apparatus can position a printed wiring board only with a conveyor and a sensor. The sensor can be formed smaller than the stopper that stops the printed wiring board by contact, and the occupied space may be narrow, so that the sensor can be attached to the conveyor while avoiding interference with other components. For this reason, according to this invention, the conveying apparatus which can change a conveyance direction easily can be provided.

According to the second aspect of the present invention, since the deceleration start timing and the position of the printed wiring board after deceleration can be detected by one sensor, the cost can be reduced.
According to the invention described in claim 3, since the printed wiring board is conveyed at a relatively low constant speed after the position of the printed wiring board is detected by the sensor located downstream in the conveying direction, It is possible to easily and accurately measure the distance that the board has been conveyed. For this reason, according to this invention, since a printed wiring board can be positioned by the simple structure of measuring time, positioning accuracy can be improved, aiming at cost reduction.

According to the fourth aspect of the present invention, it is possible to provide a surface mounter that can stop the printed wiring board without being subjected to an impact and can easily change the transport direction.
According to the fifth aspect of the present invention, it is possible to provide a solder coating apparatus capable of stopping the printed wiring board without applying an impact and easily changing the transport direction.

According to the sixth aspect of the present invention, it is possible to provide a printed wiring board inspection apparatus that can stop the printed wiring board without applying an impact and can easily change the transport direction.
According to the seventh aspect of the invention, since the printed wiring board is stopped by the stop of the conveyor, the impact force is not applied to the printed wiring board. For this reason, when the printed wiring board on which the mounting component is mounted is transported by the transporting method of the present invention, the mounting component can be stopped at the correct mounting position when the printed wiring board stops.

(First embodiment)
Hereinafter, an embodiment of a transport device used for carrying out the transport method according to the present invention will be described in detail with reference to FIGS. Here, an example in which the transport device according to the present invention is mounted on a surface mounter will be described.
1 is a plan view of a surface mounter equipped with a transport apparatus according to the present invention, FIG. 2 is a plan view of the transport apparatus, FIG. 3 is a front view of the transport apparatus, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 5 is a side view of the transport device as viewed from the upstream side in the transport direction, FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 2, FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. It is a VIII-VIII sectional view taken on the line.
9 is a block diagram showing the configuration of the belt drive device, FIG. 10 is a sectional view of the clamp mechanism, FIG. 11 is a block diagram showing a control system of the transport device, and FIG. 12 is a flowchart for explaining the operation of the transport device. 13 is a graph showing changes in the conveyance speed.

  In these drawings, the reference numeral 1 indicates a surface mounter according to this embodiment. The surface mounter 1 includes component supply units 4 and 5 positioned on both sides (upper and lower in FIG. 1) by a component transfer device 3 on a printed wiring board P conveyed by the conveyance device 2 according to the present invention. A mounting component (not shown) is transferred. In this embodiment, the printed wiring board P is carried into the carry-in section located on the left side in FIG. 1 by the carrying device 2, and mounting components are mounted in the mounting work area located substantially at the center of the carrying device 2. Then, it is carried out to the apparatus of the next process from the carrying-out part located in the right side in FIG.

In this embodiment, the direction in which the printed wiring board P is transported by the transport device 2 (left-right direction in FIG. 1) is referred to as the X-axis direction, and the direction orthogonal to the X-axis direction on the horizontal plane (in FIG. 1). Is the Y-axis direction. In this embodiment, the lower side in FIG. 1 is referred to as the apparatus front side, and the upper side in FIG. 1 is referred to as the apparatus rear side.
A plurality of tape feeders 4a and 5a that sequentially supply components while intermittently feeding out a tape containing mounting components are loaded in the component supply units 4 and 5 in a state of being arranged in the X-axis direction.

  As shown in FIG. 1, the component transfer device 3 includes a pair of guide frames 6 and 6 extending in the Y-axis direction, and a head unit support member 7 supported by these guide frames so as to be movable in the Y-axis direction. The head unit support member 7 includes a front head unit 8 and a rear head unit 9 supported so as to be movable in the X-axis direction. The guide frames 6 and 6 are fixed to the upper surface of the base 1a.

  The head unit support member 7 is reciprocated in the Y-axis direction by a ball screw type driving device 11 having a ball screw shaft 10 provided along one guide frame 6 located on the left side in FIG. The ball screw type driving device 11 includes a ball screw shaft 10 rotatably supported by a guide frame 6, a servo motor 12 connected to one end of the ball screw shaft 10, and the ball screw shaft 10 screwed together. In this state, the nut unit 13 and the like attached to the head unit support member 7 are used.

Although not shown, the front head unit 8 and the rear head unit 9 are provided with a plurality of suction heads each having a component suction nozzle at the tip thereof. A configuration is adopted in which mounting components are sucked out from the supply units 4 and 5 and placed on the printed wiring board P.
The front head unit 8 and the rear head unit 9 are respectively arranged in the X-axis direction by a ball screw type driving device 15 for each of the head units 8 and 9 having a ball screw shaft 14 provided along the head unit support member 7. It can be reciprocated.

The ball screw type driving device 15 includes a ball screw shaft 14 rotatably supported by a head unit support member 7, a servo motor 16 connected to one end of the ball screw shaft 14, and a ball screw shaft 14. The nut unit (not shown) etc. which were attached to the head units 8 and 9 in the screwed state are comprised.
In FIG. 1, what is indicated by reference numeral 17 provided adjacent to the upstream side (left side in the figure) of the component supply units 4, 5 is sucked by the suction heads of both head units 8, 9. This is a camera for imaging the mounted component from below.

  As shown in FIGS. 1 and 2, the transport device 2 includes a carry-in conveyor 21 located on the upstream side (left side in these drawings) in the transport direction of the printed wiring board P, and a downstream side of the carry-in conveyor. A mounting conveyor 22 is provided, and a carry-out conveyor 23 is provided on the downstream side of the mounting conveyor 22. These conveyors 21 to 23 are each provided with a front conveyor belt 24 and a rear conveyor belt 25 which are a pair of endless belts paired in the Y-axis direction.

The interval between the conveyor belts 24 and 25 of each conveyor in the Y-axis direction can be changed according to the width dimension of the printed wiring board P by a width changing device 26 (see FIG. 2) described later. Further, the conveyor belts 24 and 25 of each conveyor are driven so as to be synchronized with each other by a belt driving device 27 (see FIG. 2) described later.
The carry-in conveyor 21 and the carry-out conveyor 23 have the same configuration. For this reason, in this embodiment, the carry-in conveyor 21 will be described, the carry-out conveyor 23 will be described only with respect to different points, and the other components will be assigned the same reference numerals and detailed description thereof will be omitted.

As shown in FIGS. 5 and 6, the carry-in conveyor 21 includes a fixed frame 31 that is formed in a U-shape that opens upward in a side view, and a front end portion of the fixed frame 31 (FIG. 5, The front conveyor body 32 supported on the right end in FIG. 6 and the guide rail 33 extending in the Y-axis direction (left-right direction in FIGS. 5 and 6) on the fixed frame 31 are movable in the Y-axis direction. The rear conveyor main body 34 and the like supported by
As shown in FIG. 5, the rear conveyor body 34 penetrates a ball screw shaft 35 extending in the Y-axis direction, and a drive shaft 36 composed of a spline shaft extending in the Y-axis direction as shown in FIG. 6. ing.

  As shown in FIG. 5, the ball screw shaft 35 constitutes a part of the width changing device 26, and both ends thereof are rotatably supported by the fixed frame 31 and are provided in the rear conveyor body 34. The nut member 34a is screwed. As shown in FIGS. 2 and 3, a width changing motor 39 is connected to the end of the ball screw shaft 35 on the front side of the apparatus via a pulley 37 and a driving belt 38. The width changing motor 39 is positioned at the center in the X-axis direction at the end of the base 1a on the front side of the apparatus, and both the ball screw shaft 35 of the carry-in conveyor 21 and the ball screw shaft 35 of the carry-out conveyor 23 are both. Drive.

  The drive shaft 36 constitutes a part of the belt drive device 27, and as shown in FIG. 6, both ends thereof are rotatably supported by the fixed frame 31, and the front conveyor belt drive pulley 40 and The rear conveyor belt drive pulley 41 is provided to rotate integrally. The rear conveyor belt drive pulley 41 is rotatably supported by the rear conveyor body 34 so that rotational force is transmitted from the drive shaft 36 and is movable in the axial direction with respect to the drive shaft 36. It is configured.

  As shown in FIG. 4, these conveyor belt drive pulleys 40 and 41 are wound around conveyor belts 24 and 25 together with driven pulleys 42 provided on the front conveyor body 32 and the rear conveyor body 34, respectively. . The conveyor belts 24 and 25 extend in the X-axis direction in order to form a conveyance path for the printed wiring board P at the upper ends of the front conveyor body 32 and the rear conveyor body 34.

  The structure of the drive system for rotating the drive shaft 36 is different between the carry-in conveyor 21 and the carry-out conveyor 23. As shown in FIGS. 2, 4, and 6, the drive shaft 36 of the carry-in conveyor 21 is connected to a conveyor belt drive motor 45 via a pulley 43 and a drive belt 44 at the end on the rear side of the apparatus. ing. As shown in FIG. 9, the drive shaft 36 of the carry-out conveyor 23 is connected to a transmission shaft 48 described later via a pulley 46 and a transmission belt 47 at an end portion on the front side of the apparatus (lower end portion in the figure). The front end is connected.

  As shown in FIGS. 7 and 9, the transmission shaft 48 is formed of a spline shaft extending in the Y-axis direction, and an end portion on the front side of the apparatus is rotatably supported by a support plate 49 on the base 1a. The end is rotatably supported by the fixing plate 50 of the conveyor belt drive motor 45. A pulley 51 is provided at the rear end of the transmission shaft 48. As shown in FIG. 4, the driving belt 44 for rotating the driving shaft 36 of the carry-in conveyor 21 is wound around the pulley 51.

  As shown in FIG. 8, the mounting conveyor 22 has a U-shaped movable frame 52 that opens upward as viewed from the side, and the apparatus front side of the movable frame 52 as shown in FIG. Between the front conveyor main body 54 supported by the cylindrical support member 53 at the end (the right end in the figure), and the front end 52a and the rear end 52b of the movable frame 52. A guide shaft 55 that is horizontally supported by the end portions 52a and 52b, a rear conveyor body 56 supported by the guide shaft 55, and the two conveyor bodies 54 and 56. The clamp device 57 (see FIG. 10) and the like are provided.

  As shown in FIGS. 1 and 3, the movable frame 52 extends in the Y-axis direction via a base plate 62 on two guide rails 61, 61 provided on the base 1 a so as to extend in the Y-axis direction. It is supported reciprocally. As shown in FIG. 1, the base plate 62 is screwed with a ball screw shaft 63 extending in the Y-axis direction, and a Y-axis is moved by a conveyor moving motor 64 connected to the rear end portion of the ball screw shaft 63. Reciprocates in the direction.

  As shown in FIGS. 2 and 7, the movable frame 52 has an end 52a on the front side of the apparatus in a state in which the rear conveyor body 56 is restricted from moving in the front-rear direction and a state in which the restriction is released. A locking device 65 is provided for switching between the two. The locking device 65 is configured to rotate the guide shaft 55 in one direction and the other as viewed in the axial direction by the power of the air cylinder 66.

The guide shaft 55 passes through the front conveyor body 54 in a state of being rotatable with respect to the front conveyor body 54, and is connected to the rear conveyor body 56 via a one-way clutch 67. The one-way clutch 67 is configured such that the guide shaft 55 is coupled to the rear conveyor body 56 when the guide shaft 55 rotates in one direction when viewed from the axial direction, and the coupled state is released when the guide shaft 55 rotates in the other direction. ing. The rear conveyor body 56 is movable in the axial direction (Y-axis direction) with respect to the guide shaft 55 when the one-way clutch 67 is in a disengaged state, and when the one-way clutch 67 is in an engaged state. Therefore, movement in the axial direction is restricted.

  The rear conveyor body 56 moves in the Y-axis direction by connecting the connecting device 68 (see FIGS. 2 and 7) provided on the rear conveyor body 56 to the rear conveyor body 34 of the carry-in conveyor 21 and the carry-out. This is performed by connecting to the rear conveyor main body 34 of the conveyor 23 and moving the rear conveyor main bodies 34, 34 of the loading / unloading conveyors 21, 23 in the Y-axis direction in this connected state.

  As shown in FIG. 2, the connecting device 68 includes a connecting rod 69 extending in the X-axis direction along the rear conveyor body 56, an air cylinder 70 for reciprocating the rod 69 in the X-axis direction, It is comprised by the connection bracket 71 etc. which were provided in the rear conveyor main bodies 34 and 34 for the carry-out conveyors 21 and 23. FIG. The connecting device 68, the ball screw shaft 35, the pulley 37, the belt 38, the width changing motor 39 and the like of the carry-in / out conveyors 21 and 23 constitute the width changing device 26 of the conveying device 2.

As shown in FIG. 10, the front conveyor main body 54 and the rear conveyor main body 56 of the mounting conveyor 22 are clamped to restrict the movement of the printed wiring board P by pushing the printed wiring board P from below on both sides. A device 57 is provided.
The clamp device 57 includes an air cylinder 73 attached to the front conveyor body 54 and the rear conveyor body 56 via attachment brackets 72. The air cylinder 73 is supported on the opposite side portions of the conveyor bodies 54 and 56 in a state where the axial direction is directed in the vertical direction. That is, the air cylinder 73 is positioned inside the mounting conveyor 22.

  The air cylinder 73 is a cylinder main body 73a attached to the bracket 72, and is movably fitted into the cylinder main body 73a so that the cylinder main body 73a is divided into an upper air chamber 73b and a lower air chamber 73c. And a piston rod 73e connected to the piston 73d and protruding upward from the cylinder body 73a. A clamp plate 75, which will be described later, is attached to the tip of the piston rod 73e via a bracket 74.

  The clamp plate 75 is for holding the printed wiring board P in the vertical direction in cooperation with the contact plate 76 provided at the upper end portions of the front conveyor body 54 and the rear conveyor body 56. It is formed to extend in the vertical direction and is positioned below the abutting plate 76. The length of the clamp plate 75 in the X-axis direction is formed to be equal to the length of the printed wiring board P in the X-axis direction. The bracket 74 is fixed to the lower end of the central portion of the clamp plate 75 in the X-axis direction. Further, both ends of the clamp plate 75 in the X-axis direction are urged upward by an urging mechanism (not shown).

  The urging mechanism includes a bottomed cylindrical support tube that opens upward, and a compression coil spring that is inserted into the support tube in a state of protruding upward from the support tube. The support cylinder is supported on the base 1a, and the compression coil spring is elastically mounted between the lower surface of the clamp plate 75 and the support cylinder in a state where initial deflection is applied. In other words, the clamp plate 75 moves upward by the elastic force of the compression coil spring in a state where the urging force is not generated by the air cylinder 73, and presses the printed wiring board P against the contact plate 76 from below. In this state, air is supplied to the upper air chamber 73b of the air cylinder 73 and air is discharged from the lower air chamber 73c, so that the clamp plate 75 together with the piston 73d and the piston 73e has a spring of the compression coil spring. Decrease against force.

  When the printed wiring board P is conveyed by the mounting conveyor 22, the clamping device 57 according to this embodiment lowers the clamping plate 75 by the air cylinder 73 so that the upper end of the clamping board 75 is spaced downward from the printed wiring board P. When the printed wiring board P is fixed, the upper air chamber 73b of the air cylinder 73 is opened to the atmosphere. When the urging force of the air cylinder 73 disappears in this way, the clamp plate 75 moves upward by the elastic force of the compression coil spring, and the printed wiring board P is sandwiched between the clamp plate 75 and the contact plate 76. Clamped.

  As shown in FIG. 7, a spline nut 81 through which the transmission shaft 48 passes is provided at the end 52a of the movable frame 52 on the apparatus front side. The spline nut 81 restricts the rotation of the transmission shaft 48 from being transmitted to the end portion 52a on the front side of the device, and the end portion 52a on the front side of the device is movable in the axial direction with respect to the transmission shaft 48. It is configured as follows. Further, as shown in FIGS. 3, 7, and 9, a pulley 82 and a belt 83 are provided at a portion of the spline nut 81 that is in front of the end portion 52 a on the front side of the apparatus and rotates integrally with the transmission shaft 48. And the drive shaft 84 of the mounting conveyor 22 is connected to each other.

  This drive shaft 84 constitutes a part of the belt drive device 27, and as shown in FIG. 8, is composed of a spline shaft extending in the Y-axis direction, and penetrates the front conveyor body 54 and the rear conveyor body 56. In this state, the movable frame 52 is rotatably supported by an end 52a on the front side of the apparatus and an end 52b on the rear side of the apparatus. The drive shaft 84 is provided so that the front conveyor belt drive pulley 85 and the rear conveyor belt drive pulley 86 rotate integrally. The rear belt drive pulley 86 is rotatably supported by the rear conveyor body 56, and is configured such that a rotational force is transmitted from the drive shaft 84 and is movable in the axial direction with respect to the drive shaft 84. Has been.

As shown in FIG. 4, the conveyor belts 24 and 25 are wound around these conveyor belt drive pulleys 85 and 86 together with driven pulleys 87 provided on the front conveyor body 54 and the rear conveyor body 56. The transport belts 24 and 25 extend in the X-axis direction so as to form a transport path for the printed wiring board P at the upper ends of the front conveyor body 54 and the rear conveyor body 56.
As shown in FIG. 9, the belt drive device 27 having the drive shaft 84 includes a transport belt drive motor 45, a drive shaft 36 of the carry-in conveyor 21, a drive shaft 36 of the carry-out conveyor 23, and the transmission shaft. 48, the drive shaft 84 of the mounting conveyor 22, the drive belt 44, the transmission belt 44, the belt 83 , and the conveyor belts 24, 25 connected to the shafts 36 , 48, 84. ing.

  That is, in the belt driving device 27, the conveyance belt driving motor 45 rotates, so that the driving power of the driving shaft 36 of the carry-in conveyor 21, the driving shaft 84 of the mounting conveyor 22, and the carry-out conveyor 23 is increased. Each of the conveyor belts 24 and 25 of the conveyors 21 to 23 is synchronously rotated. In the transport device 2 according to this embodiment, a stepping motor is used as the transport belt drive motor 45. By rotating the transport belt drive motor 45 by a predetermined number of rotations, the printed wiring board P is mounted. Position at the mounting position on the conveyor 22. The rotation of the conveyor belt driving motor 45 is controlled by a motor controller 91 shown in FIG.

  As shown in FIG. 11, the motor controller 91 is incorporated in a control device 92 that controls the operation of the surface mounter 1. The control device 92 includes a CPU 93, a storage device 94, an input device 95, a CRT display 96, a memory 97, various I / Os 100 to which an inlet sensor 98 and an outlet sensor 99 are connected. The motor controller 91 constitutes a controller referred to in the present invention.

The motor controller 91 is connected to the conveyor belt driving motor 45 via a motor amplifier 101, and includes a first conveyor control means 102, a second conveyor control means 103, and a carry-in / out means 104. Yes.
The entrance sensor 98 and the exit sensor 99 are optical sensors that irradiate the printed wiring board P with light and detect the presence or absence of the printed wiring board P by reflected light. As shown in FIG. The front conveyor body 54 is attached to an upstream end and a downstream end in the transport direction.

The first conveyor control unit 102 includes a passage determination unit 105, a conveyor speed reduction unit 106, and a conveyor reverse rotation unit 107.
The passage determining means 105 determines whether or not the rear end of the printed wiring board P (the edge on the upstream side in the transport direction) has passed above the inlet sensor 98 based on the detection result of the inlet sensor 98.
The conveyor decelerating means 106 stops the rotation speed of the conveyor belt driving motor 45 from the time when the rear end of the printed wiring board P passes above the entrance sensor 98 (the first detection in the present invention). Reduce gradually until
The conveyor reverse rotation means 107 reverses the conveyance belt drive motor 45 after stopping, and when the rear end of the printed wiring board P is detected by the entrance sensor 98 in this reverse rotation process (second detection in the present invention). The conveyor belt driving motor 45 is stopped.

The second conveyor control unit 103 includes a position setting unit 108, a positioning and conveying unit 109, an integrating unit 110, and an integrated value determining unit 111, which will be described later.
The position setting means 108 sets the position of the printed wiring board P as a starting point in a positioning conveyance process which will be described later. Specifically, the position setting means 108 initializes an accumulated value of an accumulating means 110 described later when the conveyor reverse rotation means 107 stops the conveying belt driving motor 45.

The positioning and conveying means 109 rotates the conveying belt driving motor 45 at a relatively low speed in the direction in which the printed wiring board P advances after the start point is set by the position setting means 108.
The accumulating unit 110 accumulates the number of rotations of the motor 45 (the number of pulses generated when the motor rotates) when the positioning and conveying unit 109 rotates the conveying belt driving motor 45.

  The integrated value discriminating means 111 discriminates whether or not the integrated value of the integrating means 110 has reached a predetermined target value, and stops the conveyor belt drive motor 45 when the integrated value reaches the target value. Let The target value is the number of rotations (number of pulses) of the motor 45 corresponding to the distance between the position of the starting point set by the position setting means 108 and the target stop position of the printed wiring board P. Is stored in advance in the memory 97 as unique data.

  The carry-in / carry-out means 104 rotates the conveyance belt driving motor 45 when the printed wiring board P is sent to the carry-in conveyor 21 from another device located upstream of the surface mounter 1 according to this embodiment. The printed wiring board P is smoothly carried in. The carry-in / carry-out means 104 stops the conveyance belt drive motor 45 when the printed wiring board P is carried out from the carry-out conveyor 23 to another adjacent device. The detection of the printed wiring board P by the carry-in / carry-out means 104 is performed using sensors (not shown) provided at the carry-in port and the carry-out port, or signals sent at the time of carry-out and carry-in from other adjacent devices. This can be done by detecting.

  Next, the operation of the motor controller 91 will be described with reference to the flowchart shown in FIG. 12 and the graph shown in FIG. When the printed wiring board P is carried into the conveying device 2 from the apparatus in the previous process, the carrying-in / out means 104 rotates the conveying belt driving motor 45 to carry in the carrying-in conveyor 21, the mounting conveyor 22, and the carrying-out device. All the conveyor belts 24 and 25 with the conveyor 23 are driven so as to have a predetermined conveyance speed (indicated by A in FIG. 13). When the printed wiring board P is transferred from the carry-in conveyor 21 to the mounting conveyor 22, the front edge (the front edge in the conveyance direction) is detected by the inlet sensor 98 (Step S1, B in FIG. 13). Show).

  Thus, when the entrance sensor 98 detects the printed wiring board P, the control by the first conveyor control means 102 is started. That is, as shown in steps S2 and S3, the passage determining means 105 determines whether or not the printed wiring board P has passed over the entrance sensor 98. At this time, the conveyor belt driving motor 45 has already been rotated by the loading / unloading means 104 and continues to rotate at the same rotation speed.

When the rear end edge of the printed wiring board P passes over the entrance sensor 98 and the entrance sensor 98 is turned off (first detection in the present invention), the conveyor decelerating means 106 conveys as shown in step S4. The rotational speed of the belt driving motor 45 is gradually decreased until it stops (indicated by C → D in FIG. 13 ). Then, as shown in steps S5 to S7, the conveyor reversing means 107 reverses the conveyor belt driving motor 45 until the rear edge of the printed wiring board P is detected by the entrance sensor 98 (indicated by E in FIG. 13). ). As a result, the printed wiring board P on the mounting conveyor 22 moves backward until the rear end edge is located above the entrance sensor 98.

  After the conveyor reverse rotation means 107 stops the conveyor belt drive motor 45 in step S7, the position setting means 108 of the second conveyor control means 103 sets the starting point in step S8, and in step S9, the integration means 110. Starts accumulating. In step S10, the positioning and conveying means 109 rotates the conveying belt driving motor 45 in the forward direction so that the printed wiring board P moves forward at a relatively low speed (indicated by F in FIG. 13).

In this way, in the positioning conveyance process in which the printed wiring board P moves forward at a low speed, the integrated value determining means 111 determines whether or not the integrated value has reached the target value (step S11). Then, the integrated value discriminating means 111 stops the conveyor belt driving motor 45 when the integrated value reaches the target value (step S12, indicated by G in FIG. 13).
After the printed wiring board P is thus stopped at the target stop position, the control device 92 drives the clamp device 57 (step S13). After the printed wiring board P is fixed to the mounting conveyor 22 by the clamp device 57, the mounting component is transferred to the printed wiring board P by the component transfer device 3.

  The mounting component is transferred onto the printed wiring board P by moving both head units 8 and 9 of the component transfer device 3 in the X-axis direction and the Y-axis direction. A case where the other head unit is moved in the X-axis direction while the mounting parts are sucked in the supply units 4 and 5 and the mounting conveyor 22 is moved in the Y-axis direction by the conveyor moving motor 64; There is.

  After the transfer of the mounting component onto the printed wiring board P is completed, the loading / unloading means 104 rotates the conveyance belt driving motor 45 to carry the printed wiring board P to the next process apparatus. At this time, the carry-in / carry-out means 104 detects the printed wiring board P by the exit sensor 99 and determines whether there is an abnormality. When the printed wiring board P has not been carried out, the carry-in / carry-out means 104 displays a message to that effect on the CRT display 96.

Since the conveying device 2 configured as described above stops the rotation of the mounting conveyor 22 when positioning the printed wiring board P at the mounting position, an impact is applied to the printed wiring board P at this time. It is never added.
For this reason, according to the transport device 2 according to this embodiment, the mounting component is displaced when the printed wiring board P on which the mounting component is previously mounted is transported and positioned by the mounting device in the previous process. Therefore, the mounting component can be stopped at the correct mounting position. In addition, since the conveyance speed of the printed wiring board P is relatively lowered only in a limited range of the mounting conveyor 22, the reduction in productivity due to the decrease in the conveyance speed can be suppressed as much as possible. it can.

  In the transport apparatus 2 according to this embodiment, the transport belt drive motor 45 is stopped above the entrance sensor 98, and the transport belt drive motor is rotated by the number of rotations corresponding to the distance between the entrance sensor 98 and the target stop position. Since the structure which rotates 45 is taken, the printed wiring board P can be stopped to a target stop position with high precision.

Further, the entrance sensor 98 can be formed smaller than the stopper that stops the printed wiring board P by contact, and the occupied space may be narrow, so that the mounting conveyor 22 is avoided while avoiding interference with other components. Can be installed on. For this reason, as shown in this embodiment, an outlet sensor 99 having a configuration equivalent to that of the inlet sensor 98 can be provided in the carry-out portion of the mounting conveyor 22, and by adopting this configuration, a printed wiring board can be obtained. It becomes possible to reverse the direction in which P is conveyed.
In the transport device 2 according to this embodiment, the entrance sensor 98 detects the deceleration start timing and the starting point of the positioning transport stroke, so that only one sensor is required to position the printed wiring board P. .

(Second Embodiment)
The motor controller can be configured as shown in FIGS.
FIG. 14 is a block diagram showing the configuration of the control system of the transport apparatus, FIG. 15 is a flowchart for explaining the operation of the transport apparatus, and FIG. 16 is a graph showing changes in the transport speed. In these drawings, members that are the same as or equivalent to those described with reference to FIGS. 1 to 13 are given the same reference numerals, and detailed descriptions thereof are omitted as appropriate.

  In the mounting conveyor 22 shown in FIG. 14, a first sensor 121 and a second sensor 122 are provided at intervals in the transport direction at an upstream portion in the transport direction. These sensors 121 and 122 have the same structure as the inlet sensor 98 used when the first embodiment is adopted. The first sensor 121 means “a sensor provided at the deceleration start position” in the invention described in claim 3, and the second sensor 122 means “a sensor located downstream in the transport direction”. .

The motor controller 91 according to this embodiment controls the operation of the conveyor belt driving motor 45 based on the detection results of the two sensors 121 and 122.
As shown in FIG. 14, the motor controller 91 includes first conveyor control means 123 that controls the operation of the conveyor belt driving motor 45 based on the detection result of the first sensor 121, and detection of the second sensor 122. Second conveyor control means 124 for controlling the operation of the conveyor belt driving motor 45 based on the result, and carry-in / out means 104 are provided.

The first conveyor control unit 123 includes a first detection unit 125 and a conveyance speed setting unit 126.
The first detection means 125 determines whether or not the front edge (edge on the downstream side in the conveyance direction) of the printed wiring board P has passed over the first sensor 121, and a conveyance speed setting means, which will be described later, at the time of passage. A control signal indicating the start of operation is sent to 126. The detection of the printed wiring board P by the first sensor 121 at this time constitutes the first detection in the present invention.

  The conveyance speed setting means 126 gradually decreases the rotation speed of the conveyance belt driving motor 45 after the passage of the printed wiring board P is detected by the first detection means 125 and holds it at a predetermined constant rotation speed. . This constant rotational speed is a rotational speed at which the transport speed is relatively slow, and the rotational speed at which the printed wiring board P does not slip due to inertia generated in the mounting components when the transport belts 24 and 25 are stopped. Is set to

The second conveyor control unit 124 includes a second detection unit 127, a timing unit 128, and a stop timing determination unit 129.
The second detection means 127 is arranged above the second sensor 122 in a state where the rotation speed (conveyance speed) of the conveyance belt driving motor 45 is kept constant by the conveyance speed setting means 126. Is passed, and a control signal is sent to the time measuring means 128 described later at the time of passage. The detection of the printed wiring board P by the second sensor 122 at this time constitutes the second detection referred to in the present invention.

The time counting means 128 starts time counting from the time when the second detection means 127 detects the passage of the printed wiring board P.
The stop timing discriminating means 129 compares the time measured by the time measuring means 128 with the target time, and stops the conveyor belt driving motor 45 when the target time has elapsed. The target time is a time required for the printed wiring board P to be transported the positioning transport distance between the position of the second sensor 122 and the target stop position. The positioning transport distance is stored in the memory 97 as unique data for each printed wiring board P.
The carry-in / carry-out means 104 has the same configuration as when the first embodiment is adopted. For this reason, detailed description is omitted here.

Next, the operation of the transport apparatus 2 according to this embodiment will be described with reference to the flowchart shown in FIG. 15 and the graph shown in FIG.
In the transport apparatus 2 according to this embodiment, the transport belt driving motor 45 rotates when the printed wiring board P is carried into the carry-in conveyor 21 as in the case of the first embodiment (see FIG. 16).

When the printed wiring board P is conveyed from the carry-in conveyor 21 to the mounting conveyor 22 and reaches the upper side of the first sensor 121, the first sensor 121 is turned on as shown in Step P1, and the first detection is performed. This is detected by means 125 (indicated by B in FIG. 16). Next, as shown from step P2 to step P3, the conveyance speed setting means 126 gradually reduces the rotation speed of the conveyance belt drive motor 45 until it reaches the target rotation speed (indicated by C in FIG. 16 ). Thereafter, as shown in step P4, the conveyance speed setting means 126 keeps the rotation speed of the conveyance belt driving motor 45 constant.

  Thus, in the state where the conveyance speed of the printed wiring board P is held at a constant low speed, as shown in step P5, the second detection means 127 determines the state of the second sensor 122, and the second When the printed wiring board P passes over the sensor 122, as shown in step P6, the time measuring means 128 starts measuring time (indicated by D in FIG. 16).

Next, as shown in step P7, the stop timing determining means 129 determines whether or not the elapsed time after the start of timing has reached the target time, and when it reaches the target time, the stop belt driving motor 45 is turned on. Stop (step P8, indicated by E in FIG. 16). When the conveyance belt driving motor 45 is thus stopped, the printed wiring board P is positioned at a predetermined mounting position on the mounting conveyor 22. After positioning of the printed wiring board P, as shown in step P9, the printed wiring board P is fixed at the mounting position by the clamp device 57.
In the surface mounter 1 equipped with the transport device 2, the operation after the positioning is the same as when the first embodiment is adopted, and the description thereof is omitted here.

  Therefore, in the transport apparatus 2 according to this embodiment, after the position of the printed wiring board P is detected by the second sensor 122, the printed wiring board P is transported at a relatively low constant speed. The distance which conveyed the wiring board P can be measured easily and correctly according to time. For this reason, the printed wiring board P can be stopped at a precise position without applying a mechanical shock. In addition, since the conveyance speed of the printed wiring board P is relatively lowered only in a limited range of the mounting conveyor 22, even if the conveyance speed is lowered, the reduction in productivity is suppressed as much as possible. be able to.

(Third embodiment)
As shown in the first embodiment, in order to stop the printed wiring board at the mounting position by one sensor, for example, as shown in FIG. 17 or FIG. 18, the transport device can be controlled.
17 and 18 are graphs showing changes in the conveyance speed of the conveyance device according to another embodiment.
In the example shown in FIG. 17, deceleration is started after a predetermined time T has elapsed after the leading edge of the printed wiring board P is detected by the inlet sensor 98 (indicated by C in FIG. 17). Before detecting the trailing edge of the printed wiring board P, the speed is decelerated to a predetermined conveyance speed (indicated by D in FIG. 17). Then, after the entrance sensor 98 detects the trailing edge of the printed wiring board P (indicated by E in FIG. 17), the printed wiring board P is conveyed by a distance from the detection position to the target stop position (in FIG. Show). In adopting this form, the deceleration time t is made constant regardless of the type of the printed wiring board P, and the time T is changed in accordance with the length of the printed wiring board P.

  In the example shown in FIG. 18, deceleration starts when the leading edge of the printed wiring board P is detected by the entrance sensor 98 (indicated by B in FIG. 18), and is decelerated at a constant deceleration rate, for example, and stopped (FIG. 18). In C). Then, the printed wiring board P is moved backward at a predetermined low speed (indicated by D in FIG. 18), and the trailing edge of the printed wiring board P is detected by the entrance sensor 98 (indicated by E in FIG. 18). The printed wiring board P is transported backward by a distance from the detection position to the target stop position (indicated by F in FIG. 18).

(Fourth embodiment)
The transport apparatus according to the present invention can be equipped in a printed wiring board inspection apparatus as shown in FIG.
FIG. 19 is a plan view showing a schematic configuration of a printed wiring board inspection apparatus. In this figure, the same or equivalent members as described with reference to FIGS. 1 to 13 are given the same reference numerals, and detailed description thereof is omitted as appropriate.

  The inspection apparatus 131 shown in FIG. 19 is provided with the transport apparatus 2 on the front side of the base 1a and the inspection apparatus main body 132 on the rear side. The inspection apparatus main body 132 includes a guide rail 133 provided on the base 1a so as to extend in the X-axis direction at a position higher than the mounting conveyor 22 of the transport apparatus 2, and a ball parallel to the guide rail 133. An X-axis direction driving device 135 having a screw shaft 134, a camera support bracket 136 that is supported by the guide rail 133 so as to be movable in the X-axis direction, and that the ball screw shaft 134 is screwed together, and the camera support bracket 136 A provided camera 137 is provided.

  The ball screw shaft 134 is supported at its left end in FIG. 19 by the bearing unit 138 so as to be freely rotatable on the base 1a and at the other end connected to the motor 139. The motor 139 is supported and fixed to the base 1a by a bracket (not shown) or the like, and includes a rotation detection encoder 140.

In this printed wiring board inspection apparatus 131, the mounting conveyor 22 is moved in the Y-axis direction as indicated by a two-dot chain line in the figure, and the printed wiring board P is imaged from above by the camera 137 in this state. Then, the presence / absence of the mounting component transferred on the printed wiring board P, correct / incorrect and the quality of the mounting position are detected by image processing. In the inspection device 131, when an image is taken by the camera 137, the X-axis direction driving device 135 moves the camera 137 together with the camera support bracket 136 in the X-axis direction, and the mounting conveyor 22 moves the printed wiring board P in the Y-axis direction. .
Thus, even if the transport device 2 according to the present invention is applied to the lint wiring board inspection device 131, an effect equivalent to that applied to the surface mounter is obtained.

(Fifth embodiment)
The conveyance apparatus according to the present invention can be applied to a surface mounter equipped with one conveyor, for example, as shown in FIG.
FIG. 20 is a plan view showing another embodiment of the surface mounter equipped with the transport apparatus according to the present invention. In this figure, the same or equivalent members as described with reference to FIGS. 1 to 13 are given the same reference numerals, and detailed description thereof is omitted as appropriate.

A surface mounter 141 shown in FIG. 20 includes a transfer device 2 composed of a single conveyor, and a component transfer device 3 that transfers a mounting component onto a printed wiring board P on the transfer device 2 by a single head unit 142. And. The surface mounter 141 includes a front conveyor body 32 and a rear conveyor body 34, and conveys the printed wiring board P from the right side to the left side in FIG.

  The front conveyor body 32 is provided with a first sensor 121 and a second sensor 122. The rear conveyor body 34 is configured to be movable in the front-rear direction of the apparatus with respect to the front conveyor body 32. The conveyor belt driving motors that drive the conveyor belts 24 and 25 of the conveyor bodies 32 and 34 are controlled by a motor controller configured in the same way as the motor controller shown in FIG.

In the component transfer apparatus 3 according to this embodiment, one head unit 142 is provided on the head unit support member 7, and the head unit 142 is disposed between the component supply units 4 and 5 and the printed wiring board P. By reciprocating, mounting components are transferred from the component supply units 4 and 5 onto the printed wiring board P.
Even if the surface mounter 141 according to this embodiment is equipped with the transport device 2 according to the present invention, the same effects as those of the above-described embodiments can be obtained.

  In the above embodiment, the first conveyor control means 102, 123 detects that the printed wiring board has been conveyed to the deceleration start position based on the detection results of the sensors 98, 121. It was. However, it is obtained by the position where the printed wiring board P has been transported to the conveyor transport device 2, in other words, by the feed amount of the conveyor (the rotation amount of the conveyor drive motor 45 is detected by an encoder or calculated from the speed and time of the conveyor). It may be detected that the printed wiring board is conveyed from the position where the printed wiring board is moved to the deceleration start position.

  That is, the point C during high-speed movement in the embodiment of FIG. 13, the point B during high-speed movement in the embodiment of FIG. 16, and the point B during high-speed movement in the embodiment of FIG. Alternatively, the first conveyor control means 102, 123 may be calculated from the speed and time of the conveyor or detected from the detected feed amount of the encoder.

  Therefore, the present invention includes a sensor for detecting the position of the printed wiring board and a controller for controlling the operation of the conveyor based on the detection result of the sensor in the transport device that transports the printed wiring board by the conveyor. The first conveyor control means for reducing the conveying speed of the conveyor after the printed wiring board is conveyed to a predetermined deceleration start position, and the printed wiring board detected by the detection of the printed wiring board by the sensor after the deceleration. A second conveyor control means for conveying the printed wiring board from the detection position after the deceleration by a distance between the position and the target stop position may be provided.

According to this, since the printed wiring board is transported at a high speed before deceleration, the transportation efficiency is good, and it is transported at a low speed from the position of the printed wiring board detected at a low speed to the target stop position. The printed wiring board can be stopped at the target position.
Also, the first conveyor control means starts the deceleration after detecting the deceleration start position by calculation or the detected feed amount of the encoder or the detection of the printed wiring board by the sensor, and reverses the conveyor after decelerating and stopping the printed wiring board. The second conveyor control means detects the printed wiring board being reversely fed at a low speed with a sensor, and then detects a position between the position of the printed wiring board detected by the sensor and the target stop position. The printed wiring board may be transported from the detection position after the deceleration at a low speed by a distance. This conveying device can be mounted on a surface mounting machine, a solder coating device, and a printed wiring board inspection device. Thus, the printed wiring board can be accurately positioned while increasing the conveyance efficiency of the printed wiring board.

  In each of the above-described embodiments, an example in which the rotational speed of the conveyor belt driving motor 45 is integrated when the printed wiring board P is positioned at the target stop position after the second detection by the sensor (first embodiment). ) And an example (second embodiment) in which the conveyance time is measured with a constant conveyance speed, the conveyance device 2 according to the present invention is not limited to such a limitation. The method of measuring the movement distance can be changed as appropriate.

In the above-described embodiment, an example in which the conveyance belt driving motor 45 is formed by a stepping motor has been described. However, this motor can be configured by a servo motor.
Furthermore, in the first and second embodiments, the example in which the transport device 2 according to the present invention is applied to a surface mounter has been described. However, the transport device 2 according to the present invention transports the printed wiring board P. Any device can be installed. For example, the transport device 2 according to the present invention can be equipped in a solder application device.

It is a top view of the surface mounting machine equipped with the conveying apparatus which concerns on this invention. It is a top view of a conveying apparatus. It is a front view of a conveying apparatus. It is the IV-IV sectional view taken on the line in FIG. It is the side view which looked at the conveying apparatus from the conveyance direction upstream. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG. It is the VIII-VIII sectional view taken on the line of the movable frame part in FIG. It is a block diagram which shows the structure of a belt drive device. It is sectional drawing of a clamp mechanism. It is a block diagram which shows the control system of a conveying apparatus. It is a flowchart for demonstrating operation | movement of a conveying apparatus. It is a graph which shows the change of conveyance speed. It is a block diagram which shows the structure of the control system of a conveying apparatus. It is a flowchart for demonstrating operation | movement of a conveying apparatus. It is a graph which shows the change of conveyance speed. It is a graph which shows the change of the conveyance speed of the conveying apparatus by other embodiment. It is a graph which shows the change of the conveyance speed of the conveying apparatus by other embodiment. It is a top view which shows schematic structure of the inspection apparatus for printed wiring boards. It is a top view which shows other embodiment of the surface mounter equipped with the conveying apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,141 ... Surface mounter, 2 ... Conveyor, 21 ... Conveyor for carrying in, 22 ... Conveyor for mounting, 23 ... Conveyor for carrying out, 24, 25 ... Conveyor belt, 45 ... Motor for conveying belt drive, 91 ... Motor controller , 98 ... Inlet sensor, 99 ... Exit sensor, 102,123 ... First conveyor control means, 103,124 ... Second conveyor control means, 104 ... Loading / unloading means, 105 ... Passing judgment means, 106 ... Conveyor deceleration Means 107: Conveyor reversing means 108 ... Position setting means 109 ... Positioning / conveying means 110 ... Accumulating means 111 ... Accumulated value discriminating means 121 ... First sensor 122 ... Second sensor 125 ... First Detecting means 126, conveying speed setting means, 127 second detecting means, 128 timing means, 129 stop time determining means, 131 print Line plate for inspection equipment, P ... printed wiring board.

Claims (7)

In a transport device that transports a printed wiring board by a conveyor, a transport belt driving motor that rotates the transport belt of the conveyor, and
A sensor for detecting a position of the printed wiring board,
And a controller for controlling the operation of the conveyor based on a detection result of the sensor,
This controller is detected the front edge of the printed wiring board by the sensor, the transport of the conveyor that the printed circuit board is conveyed to a predetermined deceleration start position after detecting the first detection by the sensor First conveyor control means for reducing the speed;
Wherein the distance detection position after deceleration at a low speed and a constant transportation speed between the position and the target stop position of the printed wiring board after deceleration detected by the second detection of the printed wiring board by the sensor printed Bei give a second conveyor control means for conveying the circuit board,
The second detection is performed by detecting a rear edge of the printed wiring board by the same sensor as the sensor that performed the first detection,
The second conveyor control means includes
Position setting means for setting the position of the printed wiring board after deceleration detected by the second detection as a starting point;
Integrating means for integrating the number of rotations of the conveyor belt driving motor from the starting point;
The integrated value of the integrating means is compared with a target value consisting of the number of rotations of the conveyor belt driving motor corresponding to the distance from the starting point to the target stop position of the printed wiring board, and the integrated value is the target value And an integrated value discriminating means for stopping the motor for driving the conveyor belt when the value is reached . In a transport device that transports a printed wiring board by a conveyor, a transport belt driving motor that rotates the transport belt of the conveyor, and
A sensor for detecting the position of the printed wiring board;
A controller for controlling the operation of the conveyor based on the detection result of the sensor,
The controller includes a first conveyor control means for decelerating the conveyance speed of the conveyor after detecting that the printed wiring board has been conveyed to a predetermined deceleration start position by a first detection by the sensor;
The print is detected from the detection position after being decelerated at a constant and low conveyance speed by a distance between the position of the printed wiring board after deceleration and the target stop position detected by the second detection of the printed wiring board by the sensor. A second conveyor control means for conveying the wiring board,
The sensor is disposed at a deceleration start position,
The first conveyor controller, the conveyor deceleration reverses the conveyor belt drive motor after stopping, provided with a conveyor reversing means for stopping the conveyor when the printed circuit board is detected by the sensor,
It said second conveyor control means includes a position setting means for setting a position of the printed wiring board in which the conveyor reversing means is stopped in reverse stroke the conveyor to a position of the printed wiring board by the second detection Conveying device. In a transport device that transports a printed wiring board by a conveyor, a transport belt driving motor that rotates the transport belt of the conveyor, and
A sensor for detecting the position of the printed wiring board;
A controller for controlling the operation of the conveyor based on the detection result of the sensor,
The controller includes a first conveyor control means for decelerating the conveyance speed of the conveyor after detecting that the printed wiring board has been conveyed to a predetermined deceleration start position by a first detection by the sensor;
The print is detected from the detection position after being decelerated at a constant and low conveyance speed by a distance between the position of the printed wiring board after deceleration and the target stop position detected by the second detection of the printed wiring board by the sensor. A second conveyor control means for conveying the wiring board,
The sensor includes a first sensor provided at a deceleration start position , and a second sensor disposed downstream of the deceleration start position in the transport direction .
Said first conveyor control means, the first and first detecting means for performing the first detection by the sensor, the transport speed setting means for transport speed to hold the conveying speed constant after decelerated to a predetermined low speed And
It said second conveyor control means includes a second detecting means for performing the second detection by the second sensor in a state where the conveyance speed is kept constant by the transport speed setting means,
Timing means for starting timing from the time when passage of the printed wiring board is detected by the second detection means;
The positioning conveyance distance between the position of the second sensor and the target stop position is a target time consisting of a time required for the printed wiring board to be conveyed, and a lapse of time after the time measuring means starts measuring time. And a stop timing determination means for comparing the time and stopping the transport belt driving motor when the elapsed time reaches the target time . Surface mounter for transporting the printed circuit board to the component mounting portion by the conveying apparatus according to any one of claims 1 to 3. The solder coating apparatus for transporting the solder coating unit the printed wiring board by conveying apparatus according to any one of claims 1 to 3. The printed wiring board inspection apparatus which images the said printed wiring board conveyed by the conveying apparatus as described in any one of Claim 1 thru | or 3 with a camera from upper direction. In the method of transporting the printed wiring board, wherein the printed wiring board is transported by a conveyor, the conveyor belt of the conveyor is rotated by a conveyor belt driving motor,
Slow down the transport speed after the detection of the first detection of the printed wiring board by the sensor,
The rear edge of the printed wiring board after deceleration, detected by the second detection by the same sensor as the sensor subjected to the first detection,
Set the position of the printed wiring board after deceleration detected by the second detection as a starting point,
Thereafter, the printed wiring board is transported from the starting point toward the target stop position at a low speed and a constant transport speed,
Comparing the integrated value of the rotation speed of the conveyance belt driving motor during conveyance with the target value consisting of the rotation speed of the conveyance belt driving motor corresponding to the distance from the start point to the target stop position of the printed wiring board And
A printed wiring board conveying method , wherein the conveying belt driving motor is stopped when the integrated value reaches the target value .

Images