JP5561718B2 - Pallet replacement system - Google Patents

Description

  The present invention relates to a pallet replacement system including a tray-type electronic component supply device provided with two magazines for storing pallets on which electronic components are placed.

  In the tray-type electronic component supply device, as described in Patent Document 1 (Japanese Patent Laid-Open No. 3-206695), a plurality of trays storing electronic components are stored in a tray plate portion so as to be fixable. There is a configuration in which a plurality of magazine portions for moving the plate portion in the vertical direction are provided, and the plurality of magazine portions are configured to be separately movable on a common movement path.

  Further, as described in Patent Document 2 (Japanese Patent Laid-Open No. 2000-307291), one of the two magazines is a main magazine used for supplying components to an electronic component mounting machine, The other magazine is used as a spare magazine, and in addition to these two magazines, a replenishment section is provided for replenishing electronic components to a pallet that is out of parts. When the pallet A is out, the pallet A is discharged to the replenishing section to replenish the pallet A with electronic components, and the pallet B on which electronic components of the same type as the electronic components out of the spare magazine are placed. Is pulled out to supply the electronic component to the electronic component mounting machine, and the pallet A supplied with the electronic component by the replenishing unit is replaced with the pallet of the spare magazine. There is a thing that was to house to have been pulled out slot.

Japanese Patent Laid-Open No. 3-206695 JP 2000-307291 A

In the above-mentioned Patent Document 1, when the electronic component of one magazine is cut, it is not necessary to stop the electronic component supply device and supply the electronic component, but only to change the electronic component to be supplied by the other magazine. It's okay. Also, when changing an electronic component supplied from one magazine to a different type of electronic component, there is no need to stop the electronic component supply device and replace the electronic component, just change the supplied magazine to the other. It's okay.
However, if the magazine is changed to the other at the time of setup change, the used electronic parts remain in the magazine before the change. For this reason, it is necessary to manage the number of remaining parts of each tray stored in the magazine, and it is not possible to reduce the number of work steps at the time of setup change and to improve the production efficiency.

  Further, in the above-mentioned Patent Document 2, it relates to parts replenishment at the time of part breakage, and judges whether or not there is a pallet to be replaced in each magazine depending on whether or not it is used in the next production and automatically replaces the pallet. Therefore, it is not possible to reduce the work man-hours at the time of setup change and improve the production efficiency. In addition to the two magazines, the supply part for supplying electronic parts to the pallet that is out of parts is provided, so that the entire device becomes larger and more expensive, and may meet the demands for compactness and cost reduction. Can not.

  The present invention has been made in consideration of such circumstances. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pallet replacement system that can efficiently perform pallet replacement accompanying setup change of a printed circuit board model to be produced while satisfying the demand for compactness and low cost. .

In order to achieve the above object, according to a first aspect of the present invention, two magazines configured to be independently liftable are arranged one above the other, and an electronic component is placed in a plurality of slots provided in each magazine. A tray-type electronic component supply device storing the placed pallets, and a control means for switching the pallets between the two magazines by controlling the lifting and lowering operations of the two magazines and the pallet loading / unloading operations of the magazines. One of the two magazines is a main magazine used for supplying electronic components to the electronic component mounting machine, and the other magazine is a pallet on which electronic components used in the next production are placed. The control means is a pallet housed in the main magazine, and the pallet on which electronic parts not used in the next production are placed. Main magazine replacement pallet identification information acquisition means for acquiring the identification information of the pallet, and a pallet housed in the submagazine for acquiring the identification information of the pallet on which electronic parts to be used in the next production are placed The magazine replacement pallet identification information acquisition means, and the main magazine replacement pallet identification information and the sub-magazine replacement pallet identification information based on the main magazine replacement pallet identification information and the sub-magazine replacement pallet identification information when the electronic component mounting machine is changed to the next production target printed circuit board model. Pallet changing means for changing pallets between the sub-magazines , and the pallet changing means is closest to the sub-magazine among the plurality of empty slots when there are a plurality of empty slots in the main magazine. Electronic components used in the next production are placed in empty slots A pallet replacement system for transferring the palette.

  Furthermore, the invention according to claim 2 is characterized in that the pallet replacing means includes storage means for storing the main magazine replacement pallet from the main magazine into an empty slot of the sub magazine, and the sub magazine replacement pallet. And a transfer means for transferring to an empty slot of the main magazine.

  Further, in the invention according to claim 3, when the sub-magazine has a plurality of empty slots, the storage means stores the main magazine replacement pallet in an empty slot where the movement distance of the sub-magazine by pallet replacement is the shortest. It is characterized by doing.

  Furthermore, the invention according to claim 4 is characterized in that the transfer means transfers the sub-magazine replacement pallet to an empty slot of the main magazine in which the main magazine replacement pallet is stored. .

  According to the invention according to claim 1 configured as described above, when changing the production target printed circuit board model of the electronic component mounting machine, the pallet not used in the next production and the pallet used in the next production are divided into the main magazine and the sub magazine. The magazine used to supply the electronic components to the electronic component mounting machine is not switched, and the electronic components used in the next production are not left in the magazine in the state of use. This makes it easy to manage the number of remaining parts in each tray. In addition, the presence or absence of pallets to be replaced in each magazine is determined based on the presence or absence of use in the next production, and the pallets are automatically replaced, so that the pallets to be used in the next production can be stored in the sub magazine before the start of the setup change. For example, it is possible to reduce the man-hours for the setup change work and improve the production efficiency.

  According to the invention of claim 2 configured as described above, since the control means has the storage means and the transfer means, the main magazine and the sub magazine are executed by executing the storage means and the transfer means. The pallet can be replaced efficiently.

  According to the invention according to claim 3 configured as described above, when there are a plurality of empty slots in the sub magazine, the pallet is stored in the empty slot where the movement distance of the sub magazine by pallet replacement is the shortest. It is possible to reduce the time required for pallet exchange between sub-magazines.

  According to the invention according to claim 4 configured as described above, the electronic parts to be used in the next production are placed in the empty slots of the main magazine in which the pallets stored in the sub-magazine are stored by the storing means. Since the pallet is transferred, even when the pallet is stored in all slots of the main magazine, the pallet can be efficiently exchanged between the main magazine and the sub-magazine.

It is the figure which looked at the raising / lowering mechanism of the main magazine and sub magazine in the tray type electronic component supply apparatus in the Example of this invention from the front. It is the figure which looked at the raising / lowering mechanism of the main magazine and sub magazine of an Example from the side. It is a front view of the tray type electronic component supply apparatus of an Example. It is a side view of the tray type electronic component supply apparatus of an Example. It is a cross-sectional view in AA of the tray type electronic component supply apparatus of an Example. It is an example of the production plan of the electronic component mounting machine in a present Example. It is a flowchart which shows the flow of a process of the palette replacement | exchange control program of an Example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the configuration of the tray-type electronic component supply apparatus according to this embodiment will be described with reference to FIGS. Here, FIG. 1 is a front view of the elevating mechanism of the main magazine and sub magazine inside the tray type electronic component supply apparatus, FIG. 2 is a side view of the elevating mechanism, and FIG. 3 is a tray type electronic component supply. FIG. 4 is a side view of the tray-type electronic component supply device, and FIG. 5 is a cross-sectional view taken along line AA of the tray-type electronic component supply device.

  The tray-type electronic component supply device 10 electronically mounts electronic components placed on each pallet 15 (see FIG. 4) housed in the main magazine 12 while being attached to an electronic component mounting machine (not shown). Supply to the component mounting machine. Inside the main body box 11 of the tray-type electronic component supply apparatus 10, two magazines 12 and 13 configured to be able to move up and down independently are arranged up and down, and provided in each magazine 12 and 13 as shown in FIG. In the plurality of stages of slots 17, pallets 15 on which trays 14 containing electronic components are stacked in one or more stages are stored.

  In this embodiment, the upper magazine 12 is used as a main magazine 12 mainly used for supplying electronic components to an electronic component mounting machine, and the lower magazine 13 is used as a pallet 15 on which electronic components used in the next production are placed. The sub-magazine 13 is stored. On the contrary, the lower magazine 13 may be the main magazine and the upper magazine 12 may be the sub-magazine.

  In the present embodiment, the main magazine 12 and the sub magazine 13 have the same number of slots, but the number of slots in the main magazine 12 or the sub magazine 13 may be larger than the number of slots in the other magazine. This is because at least one slot 17 of the main magazine 12 or the sub-magazine 13 is an empty slot 16 that does not accommodate the pallet 15 on which electronic components are placed. In this embodiment, among the plurality of slots 17 of the main magazine 12 and the sub-magazine 13, the uppermost slot 17 is used as an empty slot 16 (see FIG. 4).

  Next, a mechanism for raising and lowering the main magazine 12 and the sub magazine 13 independently will be described. In this embodiment, two feed screws 21L, 21R, 22L, and 22R (see FIG. 5) are provided in the vertical direction on each of the left and right sides of the main body box 11 of the tray type electronic component supply apparatus 10, and the main magazine 12 And two sets of feed screw mechanisms for raising and lowering the sub magazine 13 independently.

  The main magazine 12 is fixed on the main magazine mounting table 12a. The main magazine mounting table 12a is supported by screwing nuts 23L and 23R fixed on the left and right sides to the two left and right feed screws 21L and 21R. By rotating the left and right two feed screws 21L and 21R in synchronism in the forward or reverse direction with a first rotation transmission mechanism (not shown) using a first motor (not shown) as a drive source. The main magazine 12 is raised or lowered.

  On the other hand, the sub magazine 13 is fixed on the sub magazine mounting table 13a. The sub-magazine mounting table 13a is supported by screwing nuts 24L and 24R fixed on both left and right sides to the two left and right feed screws 22L and 22R. By rotating the two left and right feed screws 22L and 22R in synchronization with the forward or reverse direction by a second rotation transmission mechanism (not shown) using a second motor (not shown) as a drive source, The sub magazine 13 is raised or lowered.

  As shown in FIG. 3, doors 25 and 26 are respectively provided at the upper and lower portions of the front surface of the main body box 11, and when the pallet 15 is taken in and out of each slot of the main magazine 12, the upper door 25 is opened, When the pallet 15 is put in and out of each slot of the sub magazine 13, the lower door 26 is opened. The doors 25 and 26 are provided with a handle 29 for opening and closing the door and a window 30 for allowing an operator to visually recognize the inside of the main body box 11. An operation input unit 27 having various operation buttons and the like is provided on the front surface of the main body box 11. A pallet drawing table 28 (see FIG. 4) for moving the pallet 15 drawn from the main magazine 12 or the sub magazine 13 to the component suction station of the electronic component mounting machine is provided near the center of the rear surface of the main body box 11.

  Next, the configuration of the stacking height detecting means for detecting the stacking height of the trays 14 on the pallets 15 stored in the magazines 12 and 13 will be described with reference to FIGS. This stacking height detection means is necessary when the tray 14 is loaded on the pallet 15 and used, and the same configuration is provided on the main magazine 12 side and the sub magazine 13 side, respectively. . As shown in FIG. 5, each stacked height detection means includes two transmissive optical sensors 31 and 32, and light emitting elements 31 a and 32 a and light receiving elements 31 b and 32 b that constitute the optical sensors 31 and 32. Is installed at the same height position on the front side and the rear side of the main body box 11 so that the optical axis is horizontal. Further, the pallet 15 is pulled out onto the pallet pulling table 28 by gripping the pallet gripping portions 33a and 33b by a pallet loading / unloading mechanism (not shown). Further, the sub magazine mounting table 13a is guided by the guides 34a and 34b to raise and lower the sub magazine 13.

  When detecting the stacking height of the tray 14 on the pallet 15, the magazines 12 and 13 are moved up and down by a feed screw mechanism to monitor the output signals of the two optical sensors 31 and 32. The position at which one of the output signals 31 and 32 is switched from the on state to the off state (or from the off state to the on state) is detected as the upper end position of the uppermost tray 14. Specifically, the height position of the pallet 15 is detected based on the count value of the output pulse of an encoder (not shown) that detects the rotation angle of the motor of the feed screw mechanism, and the uppermost stage is detected by the optical sensors 31 and 32. When the upper end position of the tray 14 is detected (hereinafter referred to as “when the uppermost tray upper end is detected”), the stacking height of the tray 14 is detected based on the count value of the output pulse of the encoder at that time. Based on this stacking height, the number of trays 14 stacked on the pallet 15 is calculated. Even when the trays 14 are not stacked, since the upper end position (tray height) of the tray 14 can be detected by the stacking height detection means, the height of the tray 14 is input in advance by the operation input unit 27. It does not have to be. In this case, the stacking height detection means constitutes a tray height detection means.

  As described above, in this embodiment, among the plurality of slots 17 of the sub magazine 13, the uppermost slot closest to the main magazine 12 is used as the empty slot 16. Then, in each slot other than the empty slot 16 of the sub magazine 13, a pallet 15 on which electronic parts to be used in the subsequent production are placed is stored. The operator uses the operation input unit 27 as input means for inputting information (electronic component code or the like) on the pallet 15 in association with the position (slot number) of the slot 17. Based on the information input by the operation input unit 27, the control unit identifies the type of electronic component of the pallet 15 stored in the slot 17. This has the advantage that the operator can freely select the slot for storing the pallet 15 and the type of electronic component.

  While the electronic component mounting machine is in operation, the sub magazine 13 is stopped at the lower limit position (retracted position) of the elevation range, and the main magazine 12 is moved up and down in the work area by the feed screw mechanism. Then, the pallet 15 on which the electronic component requested from the electronic component mounting machine side is placed is aligned with the pallet taking-in / out position of the pallet taking-out table 28, and the pallet 15 is removed from the main magazine 12 by the pallet taking-in / out mechanism. Pull it up and move it to the component pick-up station of the electronic component mounting machine. The electronic components in the uppermost tray 14 on the pallet 15 are picked up by a suction nozzle (not shown) and mounted on the circuit board. When the uppermost tray 14 has run out of parts, the uppermost tray 14 is automatically ejected, and the electronic components in the next-stage (next uppermost) tray 14 are picked up by the suction nozzles to the circuit board. Implement.

  Thereafter, when switching the electronic component to be mounted on the circuit board to the electronic component of another pallet 15, if the electronic component remains in the tray 14 of the pallet 15 currently drawn on the pallet drawing table 28, The pallet 15 is returned to the original slot of the main magazine 12. Then, the pallet 15 on which the electronic component requested from the electronic component mounting machine side is placed is pulled out from the main magazine 12 onto the pallet drawing table 28.

  After that, when all the electronic components in the lowermost tray 14 on the pallet 15 drawn on the pallet drawing table 28 have disappeared and the components have run out, the main magazine 12 is moved to the upper limit position (withdrawal) of its lifting range. To the position) and stop. Then, the sub magazine 13 is moved up from the lower limit position of the raising / lowering range to the work area, and the uppermost empty slot 16 of the sub magazine 13 is aligned with the pallet take-in / out position of the pallet drawing table 28. Then, the pallet 15 with the parts cut out on the pallet drawing table 28 is stored in the empty slot 16 at the uppermost stage of the sub magazine 13. Thereafter, a new pallet 15 on which electronic components of the same type as the electronic components that have been cut out are placed is pulled out from the sub magazine 13 onto the pallet drawing table 28, and the supply of the electronic components to the electronic component mounting machine is continued. To do.

  Thereafter, the sub magazine 13 is lowered to the lower limit position of the raising / lowering range and stopped, and the main magazine 12 is lowered from the upper limit position of the raising / lowering range to the work area. The slot 17 that has been pulled out and is vacant is brought into a state in which it is aligned with the pallet entry / exit position of the pallet withdrawal table 28. Thereafter, when the electronic component to be supplied to the electronic component mounting machine is switched to the electronic component of the other pallet 15, the pallet 15 pulled out from the sub-magazine 13 is replaced with the original slot 17 (the component pallet 15 is out of component). Store in the stored slot 17).

  As described above, when the pallet 15 that is out of parts is stored in the empty slot 16 at the uppermost stage of the sub magazine 13, the worker can move the sub magazine in the period when the sub magazine 13 is stopped at the lower limit position of the raising / lowering range. The door 26 on the 13th side is opened, and the pallet 16 that is out of parts is pulled out from the submagazine 13, and electronic components of the same type as the electronic components on the pallet 15 transferred from the submagazine 13 side to the main magazine 12 side are placed. The new pallet 15 is supplied to the corresponding slot of the sub magazine 13.

  If parts supply work has been performed on the sub magazine 13 side when parts are out of stock, the pallet 15 is not immediately replaced and production with other parts is continued, and parts supply on the sub magazine 13 side is continued. The pallet 15 can be replaced after the work is completed. In addition, even if a new pallet 15 is pulled out from the sub magazine 13 and the same parts are not used continuously, the sub magazine 13 and the main magazine 12 are not supplied without supplying the parts to the electronic component mounting machine. It is also possible to replace only the pallet 15 between them.

  Further, the worker can store in advance the pallet 15 on which electronic components to be used in the subsequent production are placed in the slot 17 of the sub magazine 13 based on the production plan of the electronic component mounting machine. In particular, electronic parts that are not used in the current production and are used in the next production, if not stored in the main magazine 12, need to be stored in the slot 17 of the sub magazine 13 prior to the changeover. There is. At this time, the operator uses the operation input unit 27 to input information (electronic component code or the like) on the pallet 15 in association with the position (slot number) of the slot 17.

  Here, an example of the production plan of the electronic component mounting machine in the present embodiment will be described with reference to FIG. FIG. 6A is a production plan table in which printed circuit board models produced by an electronic component mounting machine to which the tray-type electronic component supply device 10 of the present invention is attached are arranged according to the production order. “Production order” indicates that production is performed in order from 1. The “printed circuit board model” is a code for identifying the model of the printed circuit board produced by the electronic component mounting machine. “Production number” is the number of printed circuit boards produced by the printed circuit board model.

  FIG. 6B is an arrangement table of electronic components to be arranged in each slot of the tray-type electronic component supply apparatus 10 when the “printed circuit board model” is “BOARD-01”. There is a table corresponding to FIG. 6B for each printed circuit board model of FIG. The “slot number” corresponds to each slot position of the main magazine 12 of the tray-type electronic component supply apparatus 10, and the “electronic component code” is a code for identifying the electronic component type. “Number of uses” represents how many electronic components housed in each slot are used to produce a printed circuit board. According to FIG. 6B, it can be seen that, for example, the slot number “1” needs to contain at least “10” electronic components identified by the electronic component code “PART-01”. That is, before the start of production, the worker uses the tray 14 in which at least “10” electronic components identified by the electronic component code “PART-01” are stored in the pallet of the slot 17 corresponding to the slot number “1”. It can be seen that it is necessary to place on the 15.

  When the electronic component mounting machine has completed the production of printed circuit boards for the number of sheets to be produced, whether or not the electronic components placed on the pallet 15 housed in each slot in the main magazine 12 are used in the next production. Is judged. Further, it is determined whether or not the electronic components placed on the pallet 15 housed in each slot in the sub magazine 13 are used in the next production. As a result, there is a pallet 15 in which electronic parts that are not used in the next production are placed in the main magazine 12 and a pallet 15 in which electronic parts that are used in the next production are placed in the sub magazine 13. Performs the replacement of each pallet 15 in the same manner as the pallet replacement operation at the time of the above-described component shortage. If there is an empty slot 16 in the main magazine 12, the next magazine in the sub-magazine 13 is set regardless of whether or not there is a pallet 15 on which electronic parts not used in the next production are placed in the main magazine 12. The pallet 15 on which electronic parts used in production are placed is transferred from the sub magazine 13 to the main magazine 12. In this case, even if there is a pallet 15 on which electronic parts not used in the next production are placed in the main magazine 12, the pallet 15 is intentionally stored in the main magazine 12 without being stored in the empty slot 16 of the sub magazine 13. But you can.

  Here, it is desirable that the time required for replacing the pallet 15 between the main magazine 12 and the sub-magazine 13 is shortened. Therefore, in this embodiment, when the sub magazine 13 has a plurality of empty slots 16, the pallet 15 stored from the main magazine 12 to the sub magazine 13 is the uppermost of the plurality of empty slots 16 of the sub magazine 13. It is desirable to store in the empty slot 16 located in the area. However, when the pallet 15 is transferred from the sub magazine 13 to the main magazine 12 after the pallet 15 is stored in the sub magazine 13, the slot in which the pallet 15 to be transferred to the main magazine 12 is stored. As long as the empty slot 16 is above 17, the final movement distance of the sub magazine 13 is the same regardless of the empty slot 16. Further, in the case of the tray-type electronic component supply device 10 in which the main magazine 12 is disposed on the lower side and the sub magazine 13 is disposed on the upper side, the uppermost empty slot 16 among the plurality of empty slots 16 of the sub magazine 13 is used. It is desirable to store. In this way, the movement distance of the sub magazine 13 accompanying pallet replacement becomes the shortest, and the time required for pallet replacement is shortened.

  The same applies to the case where there are a plurality of empty slots 16 in the main magazine 12 and the pallet 15 on which electronic parts to be used in the next production are loaded is transferred from the sub magazine 13 to the main magazine 12. In this embodiment, it is desirable to transfer to the lowest empty slot 16 among the plurality of empty slots 16 of the main magazine 12.

  Further, if there is only one empty slot 16 in the sub magazine 13 and no empty slot 16 in the main magazine 12, the pallet 15 on which electronic parts not used in the next production are placed is stored in the sub magazine. Then, the pallet 15 on which electronic parts to be used in the next production are placed is transferred to the empty slot 16 of the main magazine 12. In this way, even if the pallets 15 are stored in all slots of the main magazine 12, pallets can be exchanged between the main magazine 12 and the sub-magazine 13.

  The pallet 15 replacement control of the present embodiment described above is performed by the control device (control means) of the electronic component mounting machine and / or the control device (control means) (not shown) of the tray type electronic component supply device 10 as shown in FIG. It is executed according to the replacement control program.

  In the electronic component mounting machine to which the tray type electronic component supply device 10 of the present invention is attached, the pallet replacement is performed at the time of executing the changeover process to the next production after the production of the printed circuit board models to be produced is completed for the number of productions. Processing of the control program is started.

  First, in S100, it is determined whether or not the electronic components placed on each pallet 15 in the main magazine 12 are used in the next production. Specifically, the “electronic board code” of the electronic parts currently placed on each pallet 15 in the main magazine 12 and the “printed circuit board model” to be produced next from the production plan table shown in FIG. ”Is compared with the“ electronic component code ”of the electronic component used in the“ printed circuit board model ”, and the pallet 15 on which the electronic component of the“ electronic component code ”not overlapping is placed is the main magazine 12. It is determined whether it is within. As a result, the pallet 15 on which electronic components that are not used in the next production are placed becomes a replacement target, and the control device stores the identification information of the pallet 15 such as its slot number and electronic component code in a storage means (not shown) such as a memory. . This series of control procedures constitutes the main magazine replacement pallet identification information acquisition means in this embodiment.

  Next, in S101, it is determined whether or not the electronic parts placed on each pallet 15 in the sub magazine 13 are used in the next production. As a result, the pallet 15 on which electronic parts to be used in the next production are placed becomes a replacement target, and the control device stores the slot number, electronic part code, etc. in the storage means. This series of control procedures constitutes the sub-magazine replacement pallet identification information acquisition means in this embodiment.

  Next, in S102, the presence / absence of the pallet 15 to be replaced is determined for each magazine. If there is a pallet 15 to be replaced in each magazine, the processing from S103 is executed, and the pallet is replaced between the main magazine 12 and the sub-magazine 13. If there is no pallet 15 to be replaced in any magazine, the pallet replacement process ends. If the number of pallets to be replaced in each magazine is not the same, only the storage of the pallets 15 in the sub magazine 13 or the transfer of the pallets 15 to the main magazine 12 may be executed.

When pallet replacement is performed, in step S103, the sub magazine 13 is lowered in advance to the lower limit position (retreat position) of the ascending / descending range in order to prevent interference with the sub magazine 13 when the main magazine 12 is lowered to the work area. To stop.
A series of control procedures after S103 constitutes a pallet changing means in the present embodiment.

  Next, in S104, the main magazine 12 is lowered to the work area, and the pallet 15 to be exchanged is aligned with the pallet take-out position of the pallet drawing table 28. Then, the replacement target pallet 15 is once drawn on the pallet drawing table 28. After the pallet pull-out is completed, the main magazine 12 is raised to the retracted position in the lifting range and stopped.

  Next, in S105, the sub magazine 13 is raised to the work area, and the position of the empty slot 16 is adjusted to the pallet entry / exit position of the pallet withdrawal table 28. Then, the replacement target pallet 15 on the pallet drawing table 28 is stored in the empty slot 16. By this series of processing, the replacement target pallet 15 in the main magazine 12 is stored in the empty slot 16 of the sub magazine 13. This series of control procedures constitutes the storage means in this embodiment.

  Next, in S106, the sub-magazine 13 is raised to the work area, and the pallet 15 to be replaced is adjusted to the pallet take-in / out position of the pallet drawing table 28. Then, the replacement target pallet 15 is once drawn on the pallet drawing table 28. After the pallet drawing is completed, the sub magazine 13 is lowered to the retracted position in the ascending / descending range and stopped.

  In S107, the main magazine 12 is lowered to the work area, and the position of the empty slot 16 is adjusted to the pallet entry / exit position of the pallet withdrawal table 28. Then, the replacement target pallet 15 on the pallet drawing table 28 is stored in the empty slot 16. Through this series of processes, the replacement target pallet 15 in the sub-magazine 13 is stored in the empty slot 16 of the main magazine 12. This series of control procedures constitutes transfer means in the present embodiment.

  According to the present embodiment described above, the pallet 15 that is not used in the next production and the pallet 15 that is used in the next production are placed between the main magazine 12 and the sub magazine 13 at the time of the changeover of the printed circuit board model to be produced by the electronic component mounting machine. Since the magazine used for supplying the electronic components to the electronic component mounting machine cannot be switched, the electronic components used in the next production are not left in the magazine in the state of use, Management of the remaining number of parts in each tray 14 is facilitated. Further, the presence / absence of the pallet 15 to be replaced in each magazine is determined based on the presence / absence of use in the next production, and the pallet 15 is automatically exchanged. If it is stored in the storage space, it is possible to reduce the man-hours for the setup change work and improve the production efficiency. Furthermore, since the pallet 15 is automatically exchanged between the main magazine 12 and the sub-magazine 13, work mistakes by the operator can be prevented. Furthermore, since the pallet 15 to be transferred to the main magazine 12 is determined based on the production plan of the electronic component mounting machine, not only the pallet 15 used in the next production but also the pallet 15 used in the subsequent production as well as the sub magazine 13 in advance. Can also be mixed.

  In addition, in this embodiment, since at least one slot 17 of at least one of the main magazine 12 and the sub-magazine 13 is set as the empty slot 16, the pallet is replaced with the magazine in which the empty slot 16 exists first. Thus, pallet exchange between the main magazine 12 and the sub magazine 13 can be performed efficiently. For example, if neither the main magazine 12 nor the sub-magazine 13 has an empty slot 16, there is no slot 17 that can store the pallet 15 to be replaced, so there is no attempt to replace the pallet. However, if there is an empty slot 16 in one of the magazines, the pallet 15 to be replaced with the other magazine is stored in the empty slot 16, and then the vacant slot 16 generated by the storage is to be replaced with the other magazine. If the pallet 15 is stored, the pallet can be replaced.

  In addition, in this embodiment, since the control means has the storage means and the transfer means, the storage means and the transfer means are executed so that the main magazine 12 and the sub-magazine 13 Pallet replacement can be performed efficiently. When the number of pallets to be replaced in each magazine is the same, the storage means and the transfer means are executed the same number of times, whereby the pallet 15 between the main magazine 12 and the sub-magazine 13 is exchanged, and pallet exchange is performed. . On the other hand, when the number of replacement target pallets in each magazine is not the same, for example, when there are many replacement target pallets 15 in the sub magazine 13, in addition to the exchange of the pallets 15 between the main magazine 12 and the sub magazine 13, the sub magazine 13 The pallet can also be changed by transferring the pallet 15 to the main magazine 12.

  In addition, in this embodiment, when there are a plurality of empty slots 16 in the sub magazine 13, the pallet 15 is stored in the empty slot 16 where the movement distance of the sub magazine 13 by pallet replacement is the shortest. It is possible to shorten the time required for the pallet replacement.

  In addition, in this embodiment, the pallet 15 on which electronic parts to be used in the next production are placed is transferred by the storage means to the empty slot 16 of the main magazine 12 in which the pallet 15 stored in the sub magazine 13 is stored. Therefore, even if the pallets 15 are stored in all the slots of the main magazine 12, the pallets can be exchanged between the main magazine 12 and the sub magazine 13.

  In the present invention, a display unit may be provided for displaying the position of the slot 17 in which the pallet 15 with a component cut is stored. The display unit is provided with a light emitting element such as an LED for displaying the presence / absence of the pallet 15 for each slot, and displays the position of the slot 17 in which the pallet 15 is accommodated by turning on / off the light emitting element of each slot, Alternatively, a display panel such as a liquid crystal panel that displays the position (slot number) of the slot 17 in which the pallet 15 is accommodated by digital display, picture display, or the like may be provided. In this way, even if the empty slot position of each magazine fluctuates during the operation of the electronic component mounting machine, the operator can accurately know the position of the empty slot 16 from the display information on the display unit. Replenishment work can be performed easily.

  The present invention can be applied to a pallet replacement system including a tray-type electronic component supply device provided with two magazines for storing pallets on which electronic components are placed.

11 Body box 12 Main magazine 13 Sub magazine 14 Tray 15 Pallet 16 Empty slot 21L Feed screw 21R Feed screw 22L Feed screw 22R Feed screw 25 Door 26 Door 27 Operation input section (input means)
28 Pallet drawer table 31 Optical sensor (stacking height detection means)
32 Optical sensor (stacking height detection means)
31a Light emitting element 32a Light emitting element 31b Light receiving element 32b Light receiving element

Claims (4)

A tray-type electronic component supply device in which two magazines configured to be able to be moved up and down independently are arranged above and below, and a pallet on which electronic components are placed is stored in a plurality of slots provided in each magazine; Control means for switching the pallet between the two magazines by controlling the lifting and lowering operations of the two magazines and the pallet loading and unloading operations from each magazine,
Of the two magazines, one magazine is a main magazine used for supplying electronic components to an electronic component mounting machine, and the other magazine is a sub-magazine for storing pallets on which electronic components used in the next production are placed. And at least one slot of at least one magazine is an empty slot that does not store a pallet on which electronic components are placed,
The control means includes a main magazine replacement pallet identification information obtaining means for obtaining identification information of the pallet housed in the main magazine, on which electronic parts not used in the next production are placed, and the sub magazine Sub-magazine replacement pallet identification information acquisition means for acquiring identification information of the pallet on which electronic parts to be used in the next production are placed, and a printed circuit board targeted for next production of the electronic component mounting machine Pallet replacement means for replacing the pallet between the main magazine and the sub-magazine based on the main magazine replacement pallet identification information and the sub-magazine replacement pallet identification information when changing to a model ,
When there are a plurality of empty slots in the main magazine, the pallet exchanging means transfers a pallet on which electronic parts to be used in the next production are placed in an empty slot closest to the sub magazine among the plurality of empty slots. Pallet replacement system characterized by loading .   The pallet exchanging means transfers the main magazine exchanging pallet from the main magazine to an empty slot of the sub magazine, and transfers the sub magazine exchanging pallet from the sub magazine to an empty slot of the main magazine. The pallet replacement system according to claim 1, further comprising: a transfer unit configured to transfer the pallet.   3. The main magazine replacement pallet is stored in an empty slot in which the movement distance of the sub magazine by pallet replacement is shortest when the storage means has a plurality of empty slots in the sub magazine. The pallet replacement system described. The pallet replacement system according to claim 2 or 3, wherein the transfer means transfers the sub-magazine replacement pallet to an empty slot of the main magazine in which the main magazine replacement pallet is stored.

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