JP3863530B2 - Electronic component feeder - Google Patents

Description

  The present invention relates to an electronic component supply apparatus 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 apparatus body. Specifically, a unit base on which a large number of component supply units can be mounted, 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 an attached mover.

  This type of electronic component supply device is known from Japanese Patent Application Laid-Open No. 61-239696. However, the cassette base can be moved at high speed by a linear motor built in between the cassette base and the machine base. Technology has been developed.

This linear motor is composed of a pair of stators fixed to the machine base and a mover suspended from the lower surface of the cassette base, and the pair of stators are arranged so as to sandwich the mover from both sides thereof. The stator is configured by arranging a large number of magnets in the longitudinal direction of the machine base, and the mover is configured by winding an excitation coil around a magnetic structure. And by using a linear motor, the cassette base can be moved at high speed.
JP 61-239696 A

  However, the motor mover generates heat during continuous operation. That is, when 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 seizure. If the motor can withstand the necessary continuous operation, the outer size becomes large. When this heat generation is conducted to surrounding structures, it is stretched, causing a reduction in accuracy of component mounting.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the accuracy of component mounting from being lowered by cooling a mover that is a heat source of a linear motor.

Therefore, the first invention provides a unit base on which a large number of component supply units can be mounted, a machine base on which the unit base is slidably mounted, a stator attached to the machine base via a magnet base, In an electronic component supply apparatus comprising a linear motor comprising a mover attached to a unit base, air from an air blower is guided into an air supply passage formed in the machine base along the sliding direction of the unit base , The movable element is cooled by being brought into contact with the movable element through an air outlet opened on the surface of the machine base different from the mounting surface of the stator.

According to a second aspect of the present invention, there is provided a unit base on which a large number of component supply units can be mounted, 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 In an electronic component supply apparatus including a linear motor composed of 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 being applied to the movable element, and the air outlet is opened in the machine base in the range of movement of the unit base when the part is taken out from the component supply unit. Features.

  The third invention is the first or second invention, wherein the air introduced into the air supply passage formed in the machine base is passed 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 apparatus of the present invention, the air from the air blower is guided into the air supply passage formed along the sliding direction of the unit base in the machine base on which the unit base is slidably mounted. By cooling the mover against the mover, which is the heat source of the linear motor, through an air outlet opened on the surface of the machine base different from the mounting surface of the machine, the accuracy of component mounting is not lowered. can do. According to the second aspect of the present invention, an air outlet for cooling the mover against the mover is opened in the machine base in the unit base moving range when the component is taken out from the component supply unit. Therefore, the air consumption flow rate can be reduced. Furthermore, according to the invention described in claim 3, since the air outlet is provided with a filter, it is possible to capture a small piece of tape 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 around 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 for mounting the electronic component A on a printed circuit board B in parallel with each other with the apparatus main body 2 interposed therebetween. 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 the drive system, a rotary table 7 connected thereto, and a plurality of (for example, twelve) mounting heads 8 mounted on the outer periphery of the rotary table 7. The rotary 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 appropriately faces the supply system 3 and the mounting system 4 and sucks the electronic component A supplied from the supply system 3 and then rotates to the mounting system 4. It is transported and mounted on the printed circuit board B introduced into the mounting system 4.

  The electronic component supply device 3 constituting the supply system includes a machine base 11 that is long in the front-rear direction, four slide bases (unit bases) 12 that are slidably mounted on the machine base 11, and detachable from each slide base 12. A number of tape cassettes (part supply units) 13 mounted and a linear motor 14 incorporated between the machine base 11 and each slide base 12 are provided. The four slide bases 12 are arranged in front of and behind the machine base 11 as a set, and two sets of tape cassettes 13 are alternately exposed to the apparatus main body 2 via the respective slide bases 12 and 12. I am doing so. That is, while the two slide bases 12 and 12 each having a large number of tape cassettes 13 are moved (slid) to the position of the apparatus main body 2 to perform the component supply operation, the other is at the home (origin) position. On the two slide bases 12 and 12, the tape cassette 13 is exchanged for the next operation.

  As shown in FIGS. 2 and 3, each tape cassette 13 is thinly formed, and a plurality of thinly formed tape cassettes 13 are mounted side by side with a narrow gap on the upper surface of the slide base 12. . In this case, each tape cassette 13 is positioned on the upper surface of the slide base 12 and is detachably mounted by lever operation. 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 of being wound around a tape reel 16, and the electronic components A are carriers fed from the tape reel 16. The tape is sucked from the tape C by the suction nozzle 9 as needed.

  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 are provided on the lower surface of the slide block 23. The base block 22 is integrally formed with a horizontal portion 26 and an inclined portion 27, and the inclined portion 27 is disposed at a position where the tape reel 16 has escaped with respect to the tape cassette 13 attached to the horizontal portion 27.

  The slide block 23 has an upper horizontal portion 29, a vertical portion 30, and a lower horizontal portion 31 that are integrally formed in a cross-sectional crank shape, and a rib portion 32 is appropriately provided on the outer side 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 24 a is fixed to the lower surface of the outer end portion of the upper horizontal portion 29, and the second slider 24 b is fixed to the lower surface of the outer end portion of the lower horizontal portion 31.

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

  The machine base 11 includes a machine base body 41 and a vertical block 42, and a first slide rail 43 a with which the first slider 24 a engages is attached to the upper surface of the end of the vertical block 42. A second slide rail 43b with which the second slider 24b is engaged is attached to the upper surface of the end portion of 41. An upper magnet base 44 that extends 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 base 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 mover 48 fixed to the slide base 12. The stators 47a and 47b are composed of upper and lower magnet bases 44 and 45 and upper and lower magnets 49 and 49, respectively. Of the pair of upper and lower magnets 49, 49, the upper magnet 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) therebetween. That is, the mover 48 and the upper and lower stators 47a and 47b face each other up and down to constitute the linear motor 14 as a whole.

  The mover 48 fixed to each slide block 23 is configured by winding an exciting 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 the upper and lower magnet bases 44 and 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 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 after the electronic component is taken out by the suction nozzle 9 at a predetermined pitch, and is provided below the component suction position. The scrap tape after being cut by the cutter 60 is guided to the recovery box 62 through the intake duct 61 and recovered, and an intake air blower 63 is provided on the outlet side of the recovery box 62 to promote the recovery. It is done.

  On the other hand, the vertical block 42 constituting the machine base 11 has a hollow shape, and the hollow portions are closed by the closing members 65 at intervals longer than the moving range of the slide bases 12 and 12 during the component suction operation. For example, three circular air outlets 67 are opened at a position facing the mover 48 within the movement range of the slide bases 12 and 12 during the component suction operation, and the mounting system 4 is provided. An air intake 68 is opened at a position facing the front.

  That is, the operation in which the linear motor 14 is frequently started and stopped (large effective thrust) is in the vicinity of the component suction position, and there is no operation that generates a large amount of heat at other positions, which may cause a large amount of heat. An air outlet 67 is provided at a position facing the mover 48 within the moving range of the slide bases 12 and 12 during the component adsorption operation in order to efficiently cool the vicinity of the component adsorption position or reduce the air consumption flow rate. It will be established.

  Moreover, as shown in FIG. 8, the lateral 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 the middle air as shown in FIG. Even if the air outlet 67 is located between both the slide bases 12 and 12 (both movable elements 48 and 48), the air from the air outlet 67 on both the left and right ends always hits both the movable elements 48 and 48.

  Then, the air intake port 68 and the intake air blower 63 are communicated with each other through an exhaust duct 69, and the waste tape cut by the cutter 60 is sucked by the intake air blower 63 to collect the waste tape via the intake duct 61. The air from the blower 63 is guided to the air supply passage 66 through the exhaust duct 69 and is further applied to the movable element 48 through the air outlet 67 to cool the movable element 48. Is. Since the air blower 63 for collecting the waste tape in the collection box is used to cool the mover 48 as described above, there is no need to provide a cooling blower, which is compact and inexpensive. Can be configured.

  A filter 70 is provided so as to cover each air outlet 67 from the outside, and captures a small piece of tape that has passed through the collection box 62 and sometimes a broken piece of electronic components.

  Reference numeral 71 denotes a heat radiating member, which is made of, for example, aluminum having a good thermal conductivity, and is disposed in the vicinity of the movable element 48 to radiate the heat of the movable element 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 moving drive of the linear motor 14 is monitored by the encoder 35, and the result is obtained as a deviation counter and a speed control unit ( (Both not shown).

  Then, the electronic component A is sucked out by the mounting head 8 (suction nozzle 9) of the apparatus main body 2 from the desired tape cassette 13 that has moved to the component suction position by the movement of the slide base 12, and then the rotation table 7 is rotated. The mounting head 8 (suction nozzle 9) that sucks the electronic component A is conveyed onto the printed circuit board B, and the electronic component A is mounted at a desired mounting point on the board B. Thereafter, the component mounting operation is continued in the same manner.

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

  Accordingly, the waste tape 63 cut by the cutter 60 when the intake blower 63 is operated and sucked is led to the recovery box 62 through the intake duct 61 and recovered. Further, the air from the blower 63 is guided into the air supply passage 66 through the exhaust duct 69 and further applied to the movable element 48 through the air outlet 67 to cool the movable element 48. At this time, the heat of the movable element 48 is radiated by the heat radiating member 71. Also, the filter 70 captures small pieces of tape that have passed through the collection box 62 and sometimes pieces of electronic components.

  In the present embodiment, the case where the electronic component supply apparatus is used in a high-speed electronic component mounting apparatus has been described. However, it goes without saying that the present invention can also be applied to a multifunctional electronic component mounting apparatus. Further, this electronic component supply apparatus can also be applied when 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, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

It is a side view of the high-speed type electronic component mounting apparatus provided with the electronic component supply apparatus which concerns on one Embodiment of this invention. It is an external appearance perspective view of the electronic component supply apparatus which concerns on one Embodiment of this invention. It is an expanded sectional view of the electronic component supply device concerning one embodiment of the present invention. It is sectional drawing around the stator of the electronic component supply apparatus which concerns on one Embodiment of this invention. It is a top view of the principal part which can be partially broken of the electronic component supply apparatus which concerns on one Embodiment of this invention. It is a top view of the principal part of the electronic component supply apparatus which concerns on one Embodiment of this invention. It is a front view of the principal part of the electronic component supply apparatus which concerns on one Embodiment of this invention. It is a front view of the principal part of the electronic component supply apparatus which concerns on one Embodiment of this invention. It is a front view of the principal part of the electronic component supply apparatus which concerns on one Embodiment of this invention.

Explanation of symbols

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 Movable element 63 Air blower for intake 66 Air supply passage 67 Air outlet 69 Exhaust duct 70 Filter

Claims (3)

From a unit base on which a large number of component supply units can be mounted, a machine base on which the unit base is slidably mounted, a stator attached to the machine base via a magnet base, and a mover attached to the unit base In an electronic component supply device comprising a linear motor comprising:
Air from the air blower is guided into an air supply passage formed in the machine base along the sliding direction of the unit base, and an air outlet is provided on the surface of the machine base different from the mounting surface of the stator. An electronic component supply apparatus, wherein the movable element is cooled by being applied to the movable element. From a unit base on which a large number of component supply units can be mounted, a machine base on which the unit base is slidably mounted, a stator attached to the machine base via a magnet base, and a mover attached to the unit base In an electronic component supply device comprising a linear motor comprising:
The air from the air blower is guided into an air supply passage formed in the machine base, and the mover is cooled by being applied to the mover through an air outlet opened in the machine base. An electronic component supply apparatus according to claim 1, wherein an air outlet is provided in the machine base in a range of movement of the unit base when components are taken out from the component supply unit.   The air guided into the air supply passage formed in the machine base is applied to the mover through an air outlet provided in the machine base and provided with a filter so as to cool the mover. The electronic component supply apparatus according to claim 1, wherein the electronic component supply apparatus is an electronic component supply apparatus.

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