JP3799191B2 - Electronic component feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
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 a mounter body.
[0002]
[Prior art]
As this kind of electronic component supply apparatus, for example, an apparatus described in Japanese Patent Application Laid-Open No. 61-239696 is known. This electronic component supply apparatus includes a cassette base on which a large number of side-by-side tape cassettes are mounted, and a machine base on which the cassette base is slidably mounted in the longitudinal direction thereof. The cassette base is moved by a linear motor incorporated in the machine so that a desired tape cassette faces the mounter body.
The 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 exciting coil around a yoke.
[0003]
[Problems to be solved by the invention]
In such an electronic component supply apparatus, since the machine base is configured to be sufficiently long with respect to the cassette base, the stator constituting the linear motor is covered from above on the cassette base at the portion facing the cassette base. However, other parts are exposed. For this reason, for example, when an electronic component bounced due to a suction error or indoor dust falls to a stator portion made of a magnet, the electronic component may adhere to or be attracted to the stator. In particular, since the electrodes of electronic parts are plated with nickel, they are easily attracted to the stator, and the adsorbed electronic parts are caught between the stator and the mover to drive the linear motor accurately. There was a problem that disappeared.
[0004]
An object of the present invention is to provide an electronic component supply device that can effectively prevent components and dust from being caught between a mover and a stator of a linear motor.
[0005]
[Means for Solving the Problems]
An electronic component supply apparatus according to the present invention includes a unit base on which a large number of component supply units can be mounted side by side, a machine base on which the unit base is slidably mounted, a stator attached to the machine base via a magnet base, An electronic component supply apparatus comprising: a linear motor comprising a mover attached to a unit base; and an upper magnet base and a lower magnet base that are arranged facing each other with a gap therebetween, and a lower surface of the upper magnet base An upper stator fixed to the upper surface of the lower magnet base, and the mover is positioned between the upper stator and the lower stator, and the upper stator And the lower stator and the lower stator, and is attached to the side surface of the unit base .
[0006]
According to this configuration, the mover constituting the linear motor is attached to the side surface of the unit base, and includes an upper stator fixed to the lower surface of the upper magnet base and a lower stator fixed to the lower surface of the lower magnet base. Because it is located between the upper stator and the lower stator so as to face up and down, even if an electronic component falls from the indoor garbage or the parts supply unit to the stator part, The magnet base does not get in the way and fallen objects do not come into direct contact with the stator.
[0007]
In this case, it is preferable that the outer end portion of the magnet base projects in a hook shape with respect to the stator.
[0008]
According to this configuration, the outer end portion of the magnet base protruding in a bowl shape makes it more difficult for the fallen object to come into contact with the stator. At the same time, the outer end portion of the magnet base does not cause the magnetic field lines to protrude greatly to the outside, and the fallen object can be reliably prevented from being attracted to the stator.
[0015]
In this case, the stator, to fill the gaps of a number of magnets constituting this surface that is resin molded to be flat, preferably.
[0016]
According to this configuration, it is possible to prevent the electronic parts and dust that have fallen from being supported and collected in the gap between the magnets.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a high-speed mounter 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 the high-speed mounter, and FIG. 2 is an external perspective view around the supply system. As shown in both figures, the high-speed mounter 1 includes a supply system 3 for supplying an electronic component A and a mounting system 4 for mounting the electronic component A on a substrate 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).
[0018]
The apparatus main body 2 is provided with an index unit 6 that serves as a main body of the drive system, a rotary table 7 connected thereto, and a plurality (12) of 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 substrate B introduced into the mounting system 4.
[0019]
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 slide bases 12 and 12 of each set. 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 and the parts are being supplied, the other two are at the home position. On the slide bases 12 and 12, the tape cassette 13 is exchanged for the next operation.
[0020]
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. It is sucked from the tape C by the suction nozzle 9 as needed.
[0021]
The slide base 12 includes an upper base block 22 and a lower slide block 23 that 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.
[0022]
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.
[0023]
Further, an optical sensor 36 constituting a linear encoder 35 is suspended from the lower surface of the outer end portion of the upper horizontal portion 29 with a 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. In addition, the code | symbol 39 in a figure is a photo interrupter, and this photo interrupter 39 detects this when each slide base 12 overruns a home position.
[0024]
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.
[0025]
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. Of the pair of upper and lower stators 47 a and 47 b, the upper stator 47 a is fixed downward on the lower surface of the upper magnet base 44, and the lower stator 47 b 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.
[0026]
The mover 48 fixed to each slide block 23 is configured by winding an exciting coil around a yoke (not shown), while the upper and lower stators 47a and 47b are each mounted on a machine base (upper and lower) as shown in FIG. A large number of magnets 49 are arranged in the longitudinal direction of each magnet base 44, 45) 11. 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.
[0027]
As described above, according to the present embodiment, the movable element 48 and the upper and lower stators 47a and 47b in the linear motor 14 are disposed so as to face each other vertically. The children 47a and 47b are covered with the upper magnet base 44 from above. For this reason, even if the electronic component A or indoor garbage bounced due to an adsorption mistake falls to the upper side of the linear motor 14, the upper magnet base 44 functions like a cage covering the linear motor 14, and particularly The electronic parts A and dust can be prevented from being adsorbed or adhered to the stators 47a and 47b. Therefore, it is possible to reliably prevent the electronic component A or the like from being caught between the stators 47a and 47b and the movable element 48 and inhibiting the driving of the linear motor 14.
[0028]
Thus, the upper magnet base 44 also serves as a dust-proof member, and it is preferable that the tip end portion of the upper magnet base 44 protrudes sufficiently outward with respect to the upper stator 47a. In particular, it is more preferable that the upper magnet base 44 projects outward to such an extent that the magnetic force is saturated. Further, the upper magnet base 44 may be formed integrally with the vertical block 42.
[0029]
On the other hand, since the gaps 50 of the magnets 49 of the upper and lower stators 47a and 47b are molded with the resin 51, the electronic parts A and dust that have fallen into the gap 50 do not accumulate. It is possible to prevent the parts A and the like from being caught between the stators 47 a and 47 b and the movable element 48. It is preferable that the mold resin 51 thinly covers not only the gaps 50 of the magnet 49 but also the surfaces of the upper and lower stators 47a and 47b.
[0030]
Next, another electronic component supply apparatus will be described with reference to FIG. In this electronic component supply apparatus, a horizontal support portion 53 extending in the opposite direction to the lower horizontal portion 31 is integrally formed at the lower end portion of the vertical portion 30 of the slide block 23, and a movable element 48 is formed on the horizontal support portion 53. Is fixed. A third slider 24 c is attached to the lower surface of the horizontal support portion 53, and a third slide rail 43 c is attached to the machine base body 41 correspondingly.
[0031]
On the other hand, an upper magnet base (dustproof cover) 44 is integrally formed at the upper end of the vertical block 42 of the machine base 11. The upper magnet base 44 includes a cover portion 54 that extends in the horizontal direction from the upper end portion of the vertical block 42 and a stator attachment portion 55 that extends downward in the vertical direction from the tip of the cover portion 54. Is formed. More specifically, the upper magnet base 44 projects from the upper end of the vertical block 42 in a substantially “L” shape so as to cover the track of the mover 48. One right stator 47d is fixed to the inner side surface of the stator mounting portion 55 so as to face the movable element 48, and the other left stator is fixed to the inner side surface of the vertical block 42 so as to correspond thereto. 47c is fixed so as to be embedded. In other words, the movable element 48 and the left and right stators 47c and 47d are opposed to each other to form the linear motor 14.
[0032]
In such a configuration, the vertical block 42 and the upper magnet base 44 cover not only the left and right stators 47c and 47d but also the movable element 48 and its track. More specifically, the linear motor 14 is covered by the vertical block 42 and the upper magnet base 44 on an inverted “U” cross section. Therefore, the mover 48 and the left and right stators 47c and 47d are reliably protected from the falling electronic component A and dust by the upper magnet base 44 and the like. Therefore, it is possible to reliably prevent the electronic component A and the like from being caught between the stators 47c and 47d and the movable element 48 and inhibiting the driving of the linear motor 14. Note that the stators 47c and 47d may be provided on only one of the left and right sides, and are not necessarily provided on both sides.
[0033]
Next, still another electronic component supply apparatus will be described with reference to FIG. In this electronic component supply apparatus, the linear motor 14 is composed of a single stator 47e and a movable element 48, and the movable element 48 and the stationary element 47e face each other in the same manner as in the second embodiment. The vertical part 30 of the slide block 23 is formed thick, and the lower horizontal part 31 extends outward from a substantially vertical middle position of the vertical part 30. And the 1st slider 24a and the 3rd slider 24c are attached to the upper end part and lower end part by the side of the vertical block 42 of the vertical part 30, respectively, The upper end part of the vertical block 42 corresponding to these A first slide rail 43a and a third slide rail 43c are attached to the lower end and the lower end, respectively.
[0034]
Further, a concave portion 57 is formed at an upper and lower intermediate position inside the vertical portion 30, and the above-described movable element 48 is fixed to the concave portion 57. On the other hand, a stator 47e is fixed at an intermediate position between the vertical block 42 and the mover 48. Furthermore, a dustproof cover 58 is attached to the vertical block 42, located above the stator 47e. The dust cover 58 extends horizontally toward the vertical portion 30, covers the air gap (gap) between the stator 47 e and the movable element 48 from above, and the tip thereof faces the recess 57. Yes.
[0035]
In such a configuration, since the movable element 48 and the stationary element 47e facing each other are covered with the dust cover 58 from above, the stationary element 47e is originally located between the stationary element 47e and the movable element 48. The air gap can also be reliably covered with the dust-proof cover 58. For this reason, it is possible to reliably prevent the electronic component A or the like from being caught between the stator 47e and the movable element 48 and inhibiting the driving of the linear motor 14. The dust cover 58 may be inclined to a roof type (single-flow roof) so that dust and the like do not accumulate on the upper surface.
[0036]
By the way, in the embodiment, the case where the electronic component supply apparatus is used for a high-speed mounter has been described. Further, this electronic component supply apparatus can also be applied when a bulk cassette or the like is mounted instead of the tape cassette.
[0037]
【The invention's effect】
As described above, according to the electronic component supply device of the present invention, the mover constituting the linear motor is attached to the side surface of the unit base, and is fixed to the lower surface of the upper magnet base and the upper surface of the lower magnet base. located between the fixed lower stator, and, since the disposed so as to face vertically upper stator and the lower stator, also electronic parts may fall on a portion of the stator This is not adsorbed by direct contact with the stator. That is, it is possible to effectively prevent parts or dust from being caught between the mover and the stator of the linear motor, and to avoid a drive failure of the linear motor due to the parts being caught.
[0039]
Furthermore, according to the present invention, it is possible to prevent the electronic components that have fallen from being supported and collected in the gaps between the magnets. As a result, between the mover and the stator of the linear motor, components and dust can be prevented. And the like can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a side view of a high-speed mounter including an electronic component supply device according to an embodiment of the present invention.
FIG. 2 is an external perspective view of the electronic component supply apparatus according to the embodiment.
FIG. 3 is an enlarged cross-sectional view of the electronic component supply apparatus according to the embodiment.
FIG. 4 is a cross-sectional view around the stator of the electronic component supply device according to the embodiment.
FIG. 5 is an enlarged cross-sectional view of another electronic component supply apparatus .
FIG. 6 is an enlarged cross-sectional view of another electronic component supply apparatus .

Claims (3)

A unit base on which a large number of parts supply units can be mounted side by side, a machine base on which the unit base is slidably mounted, a stator attached to the machine base via a magnet base, and a movable part attached to the unit base In an electronic component supply device including a linear motor composed of a child,
An upper magnet base and a lower magnet base that are arranged to face each other with a gap therebetween, an upper stator fixed to the lower surface of the upper magnet base, and a lower stator fixed to the upper surface of the lower magnet base The mover is positioned between the upper stator and the lower stator, and is disposed to face the upper stator and the lower stator in the vertical direction, and is attached to a side surface of the unit base. The electronic component supply apparatus characterized by the above-mentioned.   The electronic component supply apparatus according to claim 1, wherein an outer end portion of the magnet base projects in a hook shape with respect to the stator. 2. The electronic component according to claim 1, wherein the upper stator and the lower stator are molded with a resin so as to fill a gap between a plurality of magnets constituting the upper stator and to have a flat surface. Feeding device.

Images