JP2004229497A - Electronic part supply arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent accuracy of installation of parts from deteriorating, by cooling a movable unit which is the heat generating source of a linear motor. <P>SOLUTION: Air from an air blower 63 for an air intake is guided through an exhaust duct 69 into an air supply passage 66 of a vertical block 42 in a machine base 11, further through an air blow port 67 in a moving range of a slide base 12, when the part is taken out, to be blown to the movable unit 48 of a linear motor 14 so as to cool the movable unit 48. While a filter 70 captures a slip of a tape sometimes a fragment or the like of the electronic parts. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to an electronic component supply device in which, for example, a large number of tape cassettes are slidably mounted side by side to supply chip components and the like to an electronic component mounting device body. More specifically, a unit base capable of mounting a large number of component supply units, a machine base on which the unit base is slidably mounted, a stator attached to the machine base via a magnet base, and the unit base The present invention relates to an electronic component supply device including a linear motor including a movable element attached thereto.

  This kind of electronic component supply device is known in Japanese Patent Application Laid-Open No. 61-239696, etc., but the cassette base can be moved by a linear motor incorporated between the cassette base and the machine base, enabling high-speed movement. Technology has been developed.

This linear motor is composed of a pair of stators fixed to a machine base and a mover suspended from the lower surface of a cassette base, and the pair of stators is disposed so as to sandwich the mover from both sides. The stator is configured by arranging a large number of magnets in a row in the longitudinal direction of the machine base, and the mover is configured by winding an exciting coil around a magnetic structure. The use of the linear motor makes it possible to move the cassette base at high speed.
JP-A-61-239696

  However, during continuous operation, the mover of the motor generates heat. That is, if a continuous operation exceeding the rated thrust (operation with a large effective thrust) is performed, the motor generates heat and stops at an allowable set value to prevent burning. If the motor can withstand the required continuous operation, the external size becomes large. When this heat is transmitted to the surrounding structures, elongation occurs, which causes a reduction in the accuracy of component mounting.

  Therefore, an object of the present invention is to prevent the accuracy of component mounting from lowering by cooling a mover that is a heat source of a linear motor.

  Therefore, the first invention provides a unit base on which a number of component supply units can be mounted, a machine base on which the unit base is slidably mounted, and a fixed base mounted to face the machine base via a magnet base. And a linear motor comprising a mover mounted on the unit base and located between the stators, wherein air from an air blower is supplied to an air supply passage formed in the machine base. The movable member is cooled by being brought into contact with the movable member via an air outlet opened on a surface of the machine base different from the mounting surface of the stator.

  Further, a second invention provides a unit base on which a number of component supply units can be mounted, a machine base on which the unit base is slidably mounted, a stator mounted on the machine base via a magnet base, and the unit. In an electronic component supply device including a linear motor including a mover attached to a base, air from an air blower is guided into an air supply passage formed in the machine base, and an air outlet opened in the machine base is provided. The movable element is cooled by contacting the movable element with the movable element, and the air outlet is opened in the machine base within a moving range of the unit base when removing parts.

  According to a third aspect of the present invention, in the first or second aspect, the air guided into the air supply passage formed in the machine base is transmitted through an air outlet provided in the machine base and provided with a filter. The movable element is cooled by being applied to the movable element.

  According to the electronic component supply device of the present invention, the air from the air blower is guided into the air supply passage formed in the machine base on which the unit base is slidably mounted, and the machine base different from the mounting surface of the stator By cooling the mover, which is a heat source of the linear motor, through the air outlet formed on the surface of the linear motor, the precision of component mounting can be prevented from deteriorating. According to the second aspect of the present invention, since the air outlet for contacting the mover and cooling the mover is opened in the machine base in the moving range of the unit base when removing parts, The air consumption flow rate can also be reduced. Furthermore, according to the third aspect of the present invention, since a filter is provided at the air outlet, it is possible to catch a small piece of tape or the like that has passed through the air supply passage.

  Hereinafter, a high-speed electronic component mounting device equipped with an electronic component supply device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a side view of a high-speed electronic component mounting apparatus, and FIG. 2 is an external perspective view of the supply system. As shown in both figures, the high-speed electronic component mounting apparatus 1 includes a supply system 3 for supplying an electronic component A and a mounting system for mounting the electronic component A on a printed circuit board B in parallel with each other across the apparatus main body 2. The supply system 3 includes an electronic component supply device 3.

  The apparatus main body 2 is provided with an index unit 6 serving as a main body of a drive system, a rotary table 7 connected to the index unit 6, and a plurality of (for example, 12) mounting heads 8 mounted on an outer peripheral portion of the rotary table 7. The rotation table 7 is intermittently rotated by the index unit 6 at an intermittent pitch corresponding to the number of mounting heads 8. When the rotary table 7 rotates intermittently, the suction nozzle 9 mounted on each mounting head 8 faces the supply system 3 and the mounting system 4 as appropriate, sucks the electronic component A supplied from the supply system 3, and then rotates to the mounting system 4. This is mounted on the printed circuit board B transported and introduced into the mounting system 4.

  An electronic component supply device 3 constituting a supply system includes a machine base 11 that is long in the front-rear direction, four slide bases (unit bases) 12 slidably mounted on the machine base 11, and detachably attached to each slide base 12. The apparatus includes a large number of tape cassettes (component supply units) 13 mounted thereon and a linear motor 14 incorporated between the machine base 11 and each slide base 12. The four slide bases 12 are arranged as a set in front and rear of the machine base 11, and two groups of tape cassettes 13 alternately face the apparatus main body 2 via the slide bases 12 and 12 of each set. Like that. That is, while the two slide bases 12, 12 each carrying a large number of tape cassettes 13 move (slide) to the position of the apparatus main body 2 and perform the component supply operation, the other slide base 12, which is at the home (origin) position. On the two slide bases 12 and 12, the exchange operation of the tape cassette 13 is performed for the next operation.

  As shown in FIGS. 2 and 3, each tape cassette 13 is formed thin, and a large number of thin tape cassettes 13 are mounted side by side on the upper surface of the slide base 12 with a narrow gap. . In this case, each tape cassette 13 is positioned on the upper surface of the slide base 12, and is detachably mounted by operating a lever. The mounting head 8 (suction nozzle 9) of the apparatus main body 2 faces the front end of the tape cassette 13 mounted on the slide base 12 in order to suck the electronic component A. A carrier tape C loaded with electronic components A at a predetermined pitch is mounted on the tape cassette 13 in a state wound around a tape reel 16, and the electronic component A is loaded on the carrier reel unreeled from the tape reel 16. The suction nozzle 9 sucks the tape C at any time.

  The slide base 12 includes an upper base block 22 and a lower slide block 23, which are positioned and fixed via left and right joining members 21a and 21b. The tape cassette 13 is mounted on the upper surface of the base block 22, and a pair of left and right sliders 24 a and 24 b is provided on the lower surface of the slide block 23. The base block 22 is formed integrally with a horizontal portion 26 and an inclined portion 27, and the inclined portion 27 is disposed at a position away from the tape reel 16 with respect to the tape cassette 13 mounted on the horizontal portion 27.

  The slide block 23 is formed integrally with the upper horizontal portion 29, the vertical portion 30, and the lower horizontal portion 31 in a crank shape in cross section, and a rib portion 32 is appropriately formed on the outside from the vertical portion 30 to the lower horizontal portion 31. Is formed. The upper horizontal portion 29 supports the horizontal portion 26 of the base block 22 via one joining member 21a, and the rib portion 32 supports the inclined portion 27 of the base block 22 via the other joining member 21b. . The first slider 24a is fixed to the lower surface of the outer end of the upper horizontal portion 29, and the second slider 24b is fixed to the lower surface of the outer end of the lower horizontal portion 31.

  Further, on the lower surface of the outer end portion of the upper horizontal portion 29, an optical sensor 36 constituting a linear encoder 35 is vertically provided between the upper horizontal portion 29 and a scale 34 attached to the machine base 11. An end of a cable carrier 38 that supplies a control signal and electric power to the linear motor 14 via a bracket 37 is connected to an upper surface of an outer end of the lower horizontal portion 31. Reference numeral 39 in the figure denotes a photo interrupter, and this photo interrupter 39 detects when each slide base 12 overruns the home (return to origin) position.

  The machine base 11 includes a machine body 41 and a vertical block 42. A first slide rail 43a with which the first slider 24a engages is attached to an upper surface of an end portion of the vertical block 42. A second slide rail 43b with which the second slider 24b engages is attached to the upper surface of the end of the first rail 41. An upper magnet base 44 extending horizontally is attached to the upper surface of the vertical block 42, and a lower magnet base 45 is attached to the upper surface of the machine body 41 corresponding to the upper magnet base 44.

  The linear motor 14 includes a pair of upper and lower stators 47 a and 47 b fixed to the machine base 11, and a movable element 48 fixed to the slide base 12. The stators 47a and 47b include upper and lower magnet bases 44 and 45 and upper and lower magnets 49 and 49, respectively. The upper magnet 49 of the pair of upper and lower magnets 49 is fixed downward on the lower surface of the upper magnet base 44, and the lower magnet 49 is fixed upward on the upper surface of the lower magnet base 45. On the other hand, the mover 48 has substantially the same length as the slide base 12, and is fixed to the side surface of the vertical portion 30 of the slide block 23. In this state, the upper surface of the mover 48 faces the upper stator 47a and the lower surface faces the lower stator 47b with a gap (air gap). That is, the mover 48 and the upper and lower stators 47a and 47b face vertically and constitute the linear motor 14 as a whole.

  The mover 48 fixed to each slide block 23 is configured by winding an excitation coil around a magnetic structure (not shown), while the upper and lower stators 47a and 47b are, as shown in FIG. A large number of magnets 49 are arranged in the longitudinal direction of each of the upper and lower magnet bases 44, 45. In this case, a large number of magnets 49 are arranged at equal intervals with a minute gap 50 therebetween, and a resin 51 is molded in each gap 50. That is, the gaps 50 of the many magnets 49 are molded with the resin 51 so that the surfaces of the upper and lower stators 47a and 47b are flush with each other.

  Reference numeral 60 denotes a cutter for cutting the carrier tape C at a predetermined pitch after taking out the electronic component by the suction nozzle 9, and is provided below the component suction position. The waste tape cut by the cutter 60 is guided to and collected by a collection box 62 through an intake duct 61, and an intake blower 63 is provided at an outlet side of the collection box 62 to facilitate the collection. Can be

  On the other hand, the vertical block 42 constituting the machine base 11 has a hollow shape, and both ends thereof are closed with the closing members 65 at intervals longer than the moving range of the slide bases 12 during the component suction operation. In the moving range of the slide bases 12 during the component suction operation, for example, three circular air outlets 67 are opened at positions facing the mover 48, and the mounting system 4 is formed. The air inlet 68 is opened at a position facing the.

  That is, the operation in which the linear motor 14 repeatedly starts and stops frequently (has a large effective thrust) is near the component suction position, and there is no operation that generates large heat at other positions, and there is a possibility that large heat is generated. In order to efficiently cool the vicinity of the component suction position or to reduce the flow rate of air consumption, an air outlet 67 is provided at a position facing the mover 48 within the moving range of the slide bases 12 during the component suction operation. It is to be established.

  Further, as shown in FIG. 8, the horizontal length of the mover 48 of the linear motor 14 and the distance between the centers of the air outlets 67 are the same, and as shown in FIG. Even if the air outlet 67 is located between the two slide bases 12, 12 (both movers 48, 48), air from the air outlets 67 at both left and right ends always hit both movers 48, 48.

  Then, the air inlet 68 and the air blower 63 are communicated with each other through an exhaust duct 69, and the dust tape cut by the cutter 60 is sucked by the air blower 63 to collect the waste tape through the air intake duct 61. At the same time, the air from the blower 63 is guided into the air supply passage 66 through the exhaust duct 69, and is further applied to the mover 48 through the air outlet 67 to cool the mover 48. Things. Since the mover 48 is also cooled by using the air blower 63 for collecting the waste tape in the collection box, the air blower for cooling is not required, so that it is compact and inexpensive. It can be configured as follows.

  Reference numeral 70 denotes a filter provided so as to cover the air outlets 67 from the outside. The filter 70 captures small pieces of tape that have passed through the collection box 62 and sometimes pieces of electronic components.

  Reference numeral 71 denotes a heat radiating member which is made of, for example, aluminum having good thermal conductivity and is disposed close to the mover 48 and radiates heat of the mover 48.

  With the above configuration, the production operation will be described below. Based on a production operation start command from a CPU (not shown) as a control device, the linear motor 14 is moved by a predetermined amount via a motor driver. At this time, the linear motor 14 is driven to move based on an appropriate speed loop gain. The driving of the linear motor 14 is monitored by the encoder 35, and the result is monitored by a deviation counter and a speed control unit ( (Both are not shown).

  Then, the electronic component A is suctioned and taken out from the desired tape cassette 13 moved to the component suction position by the movement of the slide base 12 by the mounting head 8 (suction nozzle 9) of the apparatus main body 2. The mounting head 8 (suction nozzle 9) that has sucked the electronic component A is transported onto the printed board B, and mounts the electronic component A at a desired mounting point on the board B. Hereinafter, the component mounting operation is similarly continued.

  Then, the carrier tape C after taking out the electronic component by the suction nozzle 9 is cut by a cutter 60 at a predetermined pitch, and the cut waste tape is guided to a collection box 62 via an intake duct 61 and collected. The air blower 63 operates only during the operation of the slide bases 12 and 12 to reduce the flow rate of air consumption, and stops when the bases are stopped.

  Accordingly, the waste tape cut by the cutter 60 by the suction blower 63 operating and sucking air is guided to the collection box 62 via the suction duct 61 and collected. Further, the air from the blower 63 is guided into the air supply passage 66 via an exhaust duct 69, and is further applied to the mover 48 via an air outlet 67 to cool the mover 48. At this time, the heat of the mover 48 is radiated by the heat radiating member 71. The filter 70 captures small pieces of tape that have passed through the collection box 62 and sometimes pieces of electronic components.

  In this embodiment, the case where the electronic component supply device is used for a high-speed electronic component mounting device has been described. However, it is needless to say that the present invention can be applied to a multifunctional electronic component mounting device. The electronic component supply device can be applied to a case where a bulk cassette or the like is mounted instead of the tape cassette.

  Although the embodiments of the present invention have been described above, various alternatives, modifications or variations are possible for those skilled in the art based on the above description, and the present invention is not limited to the above-described various embodiments without departing from the spirit thereof. It is intended to cover alternatives, modifications or variations.

1 is a side view of a high-speed electronic component mounting device including an electronic component supply device according to an embodiment of the present invention. 1 is an external perspective view of an electronic component supply device according to an embodiment of the present invention. It is an expanded sectional view of an electronic parts supply device concerning one embodiment of the present invention. It is a sectional view around a stator of an electronic parts supply device concerning one embodiment of the present invention. FIG. 2 is a plan view of a main part of the electronic component supply device according to the embodiment of the present invention, which can be partially broken. It is a top view of an important section of an electronic parts supply device concerning one embodiment of the present invention. It is a front view of an important section of an electronic parts supply device concerning one embodiment of the present invention. It is a front view of an important section of an electronic parts supply device concerning one embodiment of the present invention. It is a front view of an important section of an electronic parts supply device concerning one embodiment of the present invention.

Explanation of reference numerals

1 High-speed electronic component mounting device 2 Mounting body 3 Electronic component supply device (supply system)
9 Suction nozzle 11 Machine stand 12 Slide base (unit base)
13 Tape Cassette 14 Linear Motor 47a, 47b Stator 48 Mover 63 Air Blower 66 Air Supply Channel 67 Air Outlet 69 Exhaust Duct 70 Filter

Claims (3)

A unit base on which a number of component supply units can be mounted, a machine base on which the unit base is slidably mounted, a stator mounted on the machine base via a magnet base, and a unit mounted on the unit base. An electronic component supply device including a linear motor including a mover positioned between the stators,
The air from the air blower is guided into an air supply passage formed in the machine base, and is applied to the mover through an air outlet formed on a surface of the machine base different from a mounting surface of the stator. An electronic component supply device, wherein the mover is cooled. A unit base capable of mounting a large number of component supply units, a machine base on which the unit base is slidably mounted, and a stator mounted on the machine base via a magnet base and a movable element mounted on the unit base. Electronic component supply device comprising a linear motor
The air from the air blower is guided into an air supply passage formed in the machine base, and the mover is cooled by applying the air to the mover through an air outlet opened in the machine base. An electronic component supply device, wherein an air outlet is opened in the machine base within a moving range of the unit base at the time of component removal. Air guided into an air supply passage formed in the machine is applied to the mover through an air outlet provided in the machine and provided with a filter to cool the mover. The electronic component supply device according to claim 1 or 2, wherein:

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