JP7022763B2 - Tray pallet and electronic component mounting machine - Google Patents

Description

The present invention relates to a tray pallet that can mount a plurality of trays of different sizes, and an electronic component mounting machine that takes out electronic components from a plurality of different trays mounted on one tray pallet and mounts them on a substrate.

An electronic component supply device for supplying electronic components is used as an electronic component mounting machine for mounting electronic components on a substrate. The electronic component supply device is configured such that, for example, a plurality of tray pallets holding electronic components are stored in a magazine, the corresponding tray pallet is positioned by the elevating magazine, and then the tray pallet is sent out into the mounting machine. ing. The tray pallet used for the electronic component supply device has a size that complies with the JEDEC (Joint Electron Device Engineering Council) standard, and the tray that holds the electronic component is placed on it in a fixed position. .. The following Patent Document 1 describes a tray pallet for mounting a tray (micro tray) considerably smaller than a normal size tray. Specifically, a plurality of micro trays are mounted on the micro tray mounting device and set on the tray pallet via the micro tray mounting device.

JP-A-2007-109774 Issue Gazette

Conventionally, the tray pallet is standardized as described in Patent Document 1, and two trays are mounted side by side on the tray pallet. In this regard, in the above-mentioned conventional example, the micro tray mounting device is used, and a plurality of micro trays can be mounted on the tray pallet instead of the normal size tray. However, it is necessary to prepare a device for mounting a micro tray, and only a micro tray that matches the device for mounting the micro tray can be mounted. Therefore, until now, it was not possible to mount multiple trays of various sizes. In the case of a tray having a smaller size than the tray pallet, a large empty space is created on the tray pallet, which is inefficient.

Therefore, an object of the present invention is to provide a tray pallet capable of mounting a plurality of trays having different sizes and an electronic component mounting machine using the tray pallet in order to solve such a problem.

The electronic component mounting machine according to one aspect of the present invention holds the electronic components by a substrate carrier that conveys the substrate to a predetermined position in the width direction of the machine body and a suction nozzle provided on the mounting head, and transfers the electronic components to the substrate. It is a T-shaped block with a reference mark and three protruding parts formed on the component mounting device to be mounted and the rectangular pallet body whose reference positions are both corners on the feeding side. A component supply device that uses a tray pallet on which a plurality of trays can be mounted by a positioning member having a shape that matches the corners of the tray to be positioned, an image pickup device that images the reference position and the reference mark, and the above. The position information which is the position of the positioning member starting from the reference position is obtained from the dimension information of the plurality of trays and the dimensions of the positioning member, and the image pickup device is moved based on the position information of the positioning member. The reference mark is imaged by the image pickup device, the position of the reference mark attached to the positioning member is calculated based on the image pickup data of the image pickup device, and the calculated position is set as the reference position for the tray positioned by the positioning member. The component supply device has a control device for controlling the taking out of components, and the component supply device has a tray of one of the plurality of trays mounted at a fixed position corresponding to a reference position of the pallet body, and the plurality of trays. Each of the trays other than the one tray is mounted so as to be packed toward the reference position with respect to the one tray via the positioning member between adjacent trays, and the plurality of trays are mounted. The mounting direction includes the machine front-rear direction orthogonal to the machine width direction in the horizontal plane, and the control device moves the image pickup device in the direction including the machine front-rear direction on the tray pallet .

According to the above configuration, by positioning the trays on the pallet body by the positioning member, a plurality of trays of different sizes can be arbitrarily mounted. Since the reference mark is attached to the upper surface of the positioning member, the reference mark is imaged by the image pickup device, and the position of the reference mark attached to the positioning member is calculated based on the image pickup data. Electronic component extraction control can be performed as a reference position for the tray whose position is positioned by the positioning member.

It is a perspective view which showed the internal structure of one Embodiment of an electronic component mounting machine. It is a side view which showed the structure of a component supply device. It is a figure which showed one Embodiment of a tray pallet. It is a figure which showed the example of the mounting pattern of a tray. It is a figure which showed the conventional tray pallet.

Next, an embodiment of the tray pallet and the electronic component mounting machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the internal structure of the electronic component mounting machine 1 of the present embodiment. The electronic component mounting machine 1 is modularized. Then, it is mounted on the base 2 and becomes a part of the substrate production line together with a screen printing machine, a solder inspection machine, and the like. The electronic component mounting machine 1 is provided with a board transfer unit 3 for transferring a board to an adjacent mounting machine or the like, and a component mounting device 4 for moving a mounting head 11 for transporting electronic components on an XY plane. .. In this embodiment, the front-rear direction of the machine is described as the Y-axis direction, the width direction of the machine is described as the X-axis direction, and the height direction is described as the Z-axis direction.

In the substrate transport unit 3, two conveyors 301 and 302 having the same configuration are arranged side by side. Therefore, the substrate is transported at two places, and electronic components are mounted on each transport path. The board transfer unit 3 is also provided with a clamp mechanism for positioning the transferred substrate. On the other hand, in the component mounting device 4, two Y-axis rails 12 are provided in the front-rear direction of the machine body, and the Y-axis slide 13 is slidably attached to the two Y-axis rails 12. The Y-axis slide 13 is assembled with a ball screw mechanism and can move in the Y-axis direction by the rotation of the servomotor.

An X-axis rail 14 is fixed to the Y-axis slide 13, and the X-axis slide 15 is slidably attached to the X-axis rail 14. The X-axis slide 15 can be moved by a ball screw mechanism and a servomotor, and a mounting head 11 is mounted on the X-axis slide 15. Therefore, the mounting head 11 can be moved on the XY plane by driving such a Y-axis moving mechanism and the X-axis moving mechanism, and a suction nozzle 16 for sucking and holding electronic components is assembled there via an elevating mechanism. ing. Further, the mounting head 11 is also mounted with a camera 17 used for imaging a substrate or a tray pallet.

In the electronic component mounting machine 1, each device as described above is covered with a machine body cover 19, and a device table 18 and a parts supply device 8 are installed on the front part of the machine body (front side in the drawing). FIG. 2 is a side view showing the structure of the component supply device 8. The parts supply device 8 houses a magazine rack 22 that can be raised and lowered in a storage box 21. A guide rail 23 is provided in the vertical direction on the inner wall surface of the storage box 21, and a magazine rack 22 is slidably attached to the guide rail 23.

Further, inside the storage box 21, a screw shaft 24 parallel to the guide rail 23 is pivotally supported along the inner wall surface, and a ball screw mechanism is configured by a nut (not shown) fixed to the magazine rack 22. The magazine rack 22 moves up and down in the storage box 21 by controlling the rotation of the servomotor 25 connected to the screw shaft 24, and can be positioned at an arbitrary height. A plurality of slots 27 are formed in the magazine rack 22 in the vertical direction, and one tray pallet 35, which is a rectangular plate material, is inserted into each slot 27.

In the storage box 21, an opening / closing door 31 is formed on the front side of the device, and a supply port 26 is formed on the opposite side. The parts supply device 8 can insert the tray pallet 35 into the magazine rack 22 by opening and closing the opening / closing door 31. On the other hand, one tray pallet 35 moves from the magazine rack 22 to the inside of the electronic component mounting machine 1 through the supply port 26. Therefore, when the parts are supplied, the magazine rack 22 is moved up and down to align the predetermined tray pallet 35 with the supply port 26.

The parts supply device 8 is provided with a tray pallet drawer mechanism on the outside of the supply port 26 so that the tray pallet 35 can be taken in and out. The tray pallet pull-out mechanism has a ball screw mechanism assembled on a table 33 sliding on a guide rail (not shown), and is configured to be movable in the front-rear direction of the machine by driving a servomotor 34. The table 33 is provided with a hook means (not shown) capable of pulling out and inserting the tray pallet 35.

In order to accurately mount the electronic component, it is necessary that the electronic component is reliably sucked and held by the suction nozzle 16 of the mounting head 11 from the tray pallet 35 which is pulled out from the supply port 26 and is located at the component supply position. For that purpose, it is important to be able to accurately grasp the positions of electronic components. Therefore, the camera 17 mounted on the mounting head 11 captures a reference mark or the like, and the control device 38 obtains the positions of the electronic components on the tray pallet 35 and the tray 36 based on the image pickup data or the like. Here, FIG. 5 is a diagram conceptually showing a method of obtaining the position of an electronic component in a conventional tray pallet.

For example, in the conventional pattern 1, two trays 101 and 102 are mounted on a tray pallet 100, and a plurality of electronic components are held in the trays 101 and 102 in an aligned state. The trays 101, 102 are rectangular and are positioned along the sides of the tray pallet 100, which is also rectangular, using positioning blocks 103, 104 with magnets. At that time, the trays 101 and 102 on the tray pallet 100 are positioned and arranged at a fixed position depending on the width dimension of the positioning blocks 103 and 104.

Then, as shown in FIG. 1, the tray pallet 100 is pulled out from the magazine rack 22 for parts supply, and the alignment is performed at the stop position on the table 33. At this time, the front end corner portion of the tray pallet 100 (same for other tray pallets) in the drawer direction is used as a reference, and the stop position of the tray pallet 100 is obtained from the image pickup data of the reference positions P1 and P2 imaged by the camera 17. On the other hand, regarding the electronic components held in the tray, the electronic components are unified for each tray and are arranged in a vertically and horizontally aligned state, so that the positions of the electronic components are the component positions on the tray for all the trays. Information is input to the control device 38 in advance and stored in the storage unit. Therefore, by arranging the trays 101 and 102 at fixed positions on the tray pallet 100, the positions of the respective electronic components on the tray pallet 100 can be specified based on the reference positions P1 and P2.

Therefore, the electronic components are taken out from the tray pallet 100 as follows. First, the camera 17 is aligned with the reference positions P1 and P2 by the movement control of the mounting head 11, and the positions of the reference positions P1 and P2 are obtained from the image pickup data of the camera 17. Then, for example, when the electronic component 201 of the tray 101 is taken out, the position of the electronic component 201 is obtained as a value on the XY coordinates with the reference position P1 as the origin based on the component position information regarding the tray 101. Movement control of the mounting head 11 is performed based on the position data, and the suction nozzle 16 is aligned on the electronic component 201. On the other hand, when the electronic component 212 is taken out from another tray 102 on the tray pallet 100, the position of the electronic component 212 is set as a value on the XY coordinates with the reference position P2 as the origin based on the component position information regarding the tray 102. It will be required.

Next, the conventional pattern 2 shown in FIG. 5 is a tray pallet 110 on which trays 111 and 112 in which small electronic components are aligned and held are mounted. The trays 111 and 112 are rectangular and are positioned and arranged at fixed positions along the sides of the similarly rectangular tray pallet 110 by the positioning blocks 113 and 114 provided with magnets. By the way, when the size is smaller than the tray pallet 110 such as the trays 111 and 112, an empty space 115 is created on the tray pallet 110.

In the component supply device 8, the target electronic component must be moved to the component supply position at the timing of mounting. To do so, the magazine rack 22 must be raised and lowered to adjust the corresponding tray pallet 35 to the height of the supply port 26, and further to be pulled out by the tray pallet pull-out mechanism. Therefore, if the number of such operations increases, the mounting time becomes long. Therefore, it is preferable to mount many types of trays (electronic components) on the tray pallet 35 and reduce the number of operations. However, as described above, since the position of the electronic component to be mounted is specified from the reference positions P1 and P2 of the tray pallet and the component position information on the tray, the tray is added to a place such as the empty space 115. Could not be installed.

Therefore, in the present embodiment, we propose a tray pallet that can eliminate wasted space by mounting trays of different sizes on the tray pallet 35. FIG. 3 is a diagram showing an embodiment of a tray pallet in which a plurality of trays of different sizes are mounted. The tray pallet 35 is equipped with five trays 51 to 55 having different sizes. Then, the same positioning blocks 41 and 42 as in the conventional example are used for the tray 51, and the tray 51 is arranged at a fixed position corresponding to the reference position P1. Further, the other trays 52 to 55 are arbitrarily arranged by using the free positioning block 43 so as to be packed on the reference position P1 side with respect to the tray 51. In the present embodiment, the tray pallet on which the tray can be mounted means that the tray pallet 35, which is a plate material, is the pallet main body and includes the positioning blocks 41 and 42 and the free positioning block 43.

The free positioning block 43 is a T-shaped block protruding in three directions as shown in an enlarged manner in the round frame of FIG. 3, and the corners of the tray are aligned with the two corners. .. Further, the free positioning block 43 is configured such that the protruding portions on three sides are formed with the same width H, and the distance between adjacent trays is constant regardless of the orientation. A reference mark 45 for confirming the position is displayed on the surface of the free positioning block 43. The positioning blocks 41 and 42 and the free positioning block 43 are provided with magnets as in the conventional example, and can be easily attached to and detached from the tray pallet 35.

Nine free positioning blocks 43 (with the reference numeral 43n when indicating a specific position; n is a natural number) are used for mounting the trays 51 to 55 on the tray pallet 35. The arrangement of each tray is free, but only the tray 51 closest to the reference position P1 is arranged at a fixed position by the positioning blocks 41 and 42. The other trays 52 to 55 are positioned by the free positioning block 43, and the free positioning blocks 431 to 434 located at the upper left corner of the trays 52 to 55 serve as a new additional reference position. It is an arrangement starting from the reference position P1.

That is, in the example shown in FIG. 3, the additional reference positions of the free positioning blocks 431 to 434 are obtained based on the reference position P1, and the positions of the electronic components on the trays 52 to 55 are further obtained based on the additional reference positions. It is designed to be used. In this case, the size information (vertical and horizontal dimensional information) of the trays 51 to 55 and the tray arrangement information shown in FIG. 3 in which the trays 51 to 55 are arranged are input to the control device 38 and stored in the storage unit. Further, as in the conventional case, the component position information for each tray regarding the plurality of electronic components held on the trays 51 to 55 is also stored in advance.

Subsequently, the electronic components are taken out from the tray pallet 35 as follows. First, the camera 17 is aligned with the reference position P1 by the movement control of the mounting head 11 as in the conventional case, and the position of the reference position P1 is obtained from the image pickup data of the camera 17. Then, when the electronic component 511 of the tray 51 is taken out, the position of the electronic component 511 is obtained as a value on the XY coordinates with the reference position P1 as the origin, based on the component position information regarding the tray 51. Therefore, the suction nozzle 16 is aligned on the electronic component 511 by the movement control of the mounting head 11.

Next, when the electronic component is taken out from any of the trays 52 to 55 other than the tray 51, the position of the free positioning blocks 431 to 434 on the tray pallet 35 is obtained. Specifically, the illustrated reference dimensions L1, L2, L3, and L4 starting from the reference position P1 are calculated from the dimensional information of the trays 51 to 55 and the width dimension H of the free positioning block 43. Therefore, based on the reference dimensions L1 to L4, the positions of the free positioning blocks 431 to 434 with the reference position P1 as the origin are obtained as the values on the XY coordinates in the tray pallet 35.

For example, when the electronic component is taken out from the tray 52, the mounting head 11 is first moved and controlled based on the position information of the free positioning block 431, and the free positioning block 431 is imaged by the camera 17. From the imaged data, the exact position of the reference mark 45 of the free positioning block 431 is specified. When the electronic component 521 is taken out from the tray 52, the position of the reference mark 45 becomes the additional reference position. Therefore, based on the component position information of the tray 52, the position of the electronic component 521 is obtained as a value on the XY coordinates with the additional reference position (reference mark 45) as the origin. The same applies to the case where the electronic components are taken out from the other trays 53 to 55, the camera 17 is moved to the corresponding free positioning blocks 432 to 434, and the exact position of each reference mark 45 is specified from the image pickup data. Then, the position of each reference mark 45 becomes an additional reference position, and the position of the electronic component on each tray 53 to 55 is obtained with that as the origin.

Various patterns are possible for mounting the tray on the tray pallet 35 depending on the size of the tray. FIG. 4 is a diagram showing a mounting example of three patterns. In the patterns 1 and 2, the trays 61 and 62 are positioned with respect to the reference position P1, and the other trays are positioned by the free positioning block 43, respectively. On the other hand, in the pattern 3, the tray 63 is positioned with respect to the reference position P2, and the other trays are positioned by the free positioning block 43. In this pattern 3, the free positioning block located at the upper right corner of the tray serves as a new additional reference position, and is arranged with the reference position P2 as the starting point.

Therefore, according to the present embodiment, since the tray 36 is mounted using the free positioning block 43, the trays 51 and the like having different sizes can be arranged in various patterns. Therefore, it is possible to increase the types of electronic components that can be mounted on one tray pallet 35 as compared with the past, and it is possible to reduce the number of times the magazine rack 22 is raised and lowered and the number of times the tray pallet 35 is pulled out. The production efficiency of the component mounting machine 1 can be improved.

Although one embodiment of the present invention has been described above, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the present invention.
For example, when the mounting patterns of trays 51 and the like having different sizes are determined, the additional reference position (the position of the reference mark 45 of the corresponding free positioning block 43) is stored in advance for each pattern. May be good.
Further, the shape of the free positioning block may be different.

1 ... Electronic component mounting machine ... 3 ... Board transfer unit 4 ... Component mounting device 8 ... Parts supply device 11 ... Mounting head 16 ... Suction nozzle 17 ... Camera 22 ... Magazine rack 35 ... Tray pallet 36 ... Tray 41, 42 ... Positioning block 43 ... Free positioning block 45 ... Reference mark P1, P2 ... Reference position

Claims (2)

A board carrier that transports the board to a predetermined position in the width direction of the machine,
A component mounting device that holds electronic components by a suction nozzle provided on the mounting head and mounts the electronic components on the board.
It is a T-shaped block with a reference mark on the rectangular pallet body whose reference positions are both corners on the feeding side, and three protruding parts are formed. The corners of the tray to be positioned at the two corners. A parts supply device that uses a tray pallet that can mount multiple trays with a positioning member that has a shape suitable for
An image pickup device that captures the reference position and the reference mark, and
Position information, which is the position of the positioning member starting from the reference position, is obtained from the dimensional information of the plurality of trays and the dimensions of the positioning member, and the image pickup device is moved based on the position information of the positioning member. The reference mark is imaged by the image pickup device, the position of the reference mark attached to the positioning member is calculated based on the image pickup data of the image pickup device, and the calculated position is used as the reference position for the tray positioned by the positioning member. It has a control device that controls the removal of electronic components.
In the component supply device, one tray of the plurality of trays is mounted at a fixed position corresponding to a reference position of the pallet body, and each of the trays other than the one tray among the plurality of trays is , The plurality of trays are mounted so as to be packed toward the reference position with respect to the one tray via the positioning member between adjacent trays, and the mounting direction of the plurality of trays is the horizontal plane with respect to the machine width direction. Including the front-rear direction of the aircraft that is orthogonal to each other
The control device is an electronic component mounting machine that moves the image pickup device on the tray pallet in a direction including the front-back direction of the machine. The control device has a tray information unit that stores arrangement data of the plurality of trays and size data of the trays, and the image pickup device controls movement of the positioning member based on the data of the tray information unit. The electronic component mounting machine according to claim 1 .

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