JP3660459B2 - Electronic component mounting head and electronic component mounting apparatus including the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic component mounting head for adsorbing an electronic component and mounting the adsorbed electronic component on a substrate or the like, and an electronic component mounting apparatus including the same.
[0002]
[Prior art]
Conventionally, an electronic component mounting apparatus of this type is known as disclosed in JP-A-7-302999. In this electronic component mounting device, a supply unit that supplies electronic components to the mounting device body and a mounting unit that receives mounting of the electronic components from the mounting device body are disposed across the mounting device body. A mounting head having a plurality of suction nozzles mounted on the outer periphery of the rotary table is provided. While the rotary table rotates intermittently, the mounting head rotates and feeds between the supply unit and the mounting unit. At that time, the mounting head picks up electronic components from the supply system with suction nozzles, and places them on the mounting system board. Mounting. Each suction nozzle has a nozzle hole formed in its axial center, and the nozzle hole communicates with a suction passage shared by each nozzle formed in the main body of the mounting head. The suction passage is connected to a vacuum suction device via a vacuum pipe line.
[0003]
By the way, in this type of electronic component mounting apparatus, when the electronic component is sucked by the suction nozzle, dust is sucked at the same time, which may adversely affect the switching valve of the suction system. Therefore, a filter unit is interposed in the vacuum pipe so as to be attached to the outer peripheral surface of the rotary table. The filter unit includes a filter holder in which a plurality of filters are attached in the circumferential direction, and one of the plurality of filters faces the vacuum line. Further, a switching valve is incorporated in the vacuum line located downstream of the filter. If the filter facing the vacuum line is clogged (in practice, periodically), use the rotation of the rotary table to rotate the filter holder by one pitch so that the next new filter faces the vacuum line. I have to.
[0004]
[Problems to be solved by the invention]
As described above, in the conventional electronic component mounting apparatus, since the filter is interposed in the vacuum line connecting the mounting head and the vacuum suction apparatus, dust suction is allowed in the path from the suction nozzle to the filter unit. Will do. In such a case, the suction nozzle is detachable, so even if dust adheres to or clogs the nozzle hole, it can be removed relatively easily, but the suction pipe of the mounting head body and the vacuum pipe leading to the filter unit Then, it is impossible to remove dust unless they are removed from the apparatus. However, if the filter is attached to the suction nozzle, the problem is solved. However, since the suction nozzles are used in large numbers and are frequently replaced according to the electronic components, it is very complicated to mount the filter on the suction nozzle and manage the replacement time, and dust does not adhere to the inside of the filter. Thus, it is necessary to store the suction nozzle, and it is assumed that the management is complicated also in this respect.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic component mounting head and an electronic component mounting apparatus including the electronic component mounting head that can easily manage a filter and can remove dust on the upstream side of the suction path as much as possible. Yes.
[0006]
[Means for Solving the Problems]
An electronic component mounting head according to the present invention includes a head body having a suction passage formed therein, and a suction nozzle having a nozzle hole that is detachably mounted at a lower end portion of the head body and that communicates with the suction path. In the electronic component mounting head, an air filter is detachably provided on the outer peripheral surface of the upstream end of the suction passage.
[0007]
According to this configuration, since the air filter is provided on the outer peripheral surface of the upstream end of the suction passage of the head body, dust can be removed at the most upstream end of the suction path excluding the suction nozzle. In addition, since the air filter is detachably provided at the upstream end of the suction passage, the air filter can be replaced in the same form as the suction nozzle. Furthermore, since the air filter is provided not on the suction nozzle but on the outer peripheral surface of the upstream end of the suction passage facing it, the air filter can be replaced regardless of the replacement of the suction nozzle . The presence or absence of the air filter can be directly recognized , and management of the replacement time and the like becomes appropriate and easy.
[0008]
In this case, the lower end portion of the head body has an inner cylinder portion that forms the upstream side portion of the suction passage, and an outer cylinder portion to which the suction nozzle base is mounted, and the inner peripheral surface of the air filter is the inner cylinder portion. It is preferable that it is attached to the part.
[0009]
According to this configuration, the air filter does not interfere with the attachment / detachment of the suction nozzle and the airtightness, and the presence / absence of the air filter can be directly recognized with the suction nozzle detached.
[0010]
The electronic component mounting head according to the present invention includes a head body in which a suction passage is formed, and a suction hole in which a nozzle hole communicating with the suction path is detachably mounted on a lower end portion of the head body. In an electronic component mounting head comprising a nozzle, the lower end portion of the head body has an inner cylinder portion forming an upstream end portion of the suction passage and an outer cylinder portion to which the base portion of the suction nozzle is mounted. The air filter has a filter body formed in a cylindrical shape, and a bottomed filter holder that is airtightly attached to the inner cylinder portion on the inner peripheral surface and the filter main body is attached to the outer peripheral surface. Is characterized in that a plurality of through-holes having one end opened in the outer peripheral surface and the other end communicating with the suction passage are formed .
[0011]
According to this configuration, since the filter main body is located on the outer peripheral surface of the inner cylinder at the lower end of the head main body, the effective area of the filter is not the cross-sectional area of the suction passage, but the total cross-sectional area of the plurality of through holes. The effective area can be increased. For this reason, while being able to suppress the fall of suction performance, the lifetime of a filter can be extended.
[0012]
In this case, it is preferable that an annular groove connected to the plurality of through holes is formed on the outer peripheral surface of the filter holder.
[0013]
According to this configuration, the effective area of the filter becomes the surface area of the annular groove including the plurality of through holes, and the effective area can be further increased. In other words, almost the entire surface of the filter can be effectively used for dust prevention, and the life of the filter can be further extended.
[0014]
According to another aspect of the present invention, there is provided an electronic component mounting apparatus including the electronic component mounting head according to any one of claims 1 to 4, a head moving mechanism for moving the mounting head, and an air filter. And a filter attaching / detaching mechanism that is relatively close to the attachment head from which the suction nozzle is detached and attaches / detaches the air filter to / from the attachment head.
[0015]
According to this configuration, the air filter can be automatically mounted (replaced) by holding the air filter in the filter attaching / detaching mechanism and relatively approaching the mounting head from which the suction nozzle is detached. it can. Of course, if a plurality of portions capable of holding the air filter of the filter attaching / detaching mechanism are provided, the air filter can be automatically replaced. That is, the air filter can be replaced without stopping the operation of the apparatus.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electronic component mounting apparatus equipped with an electronic component suction nozzle according to an embodiment of the present invention will be described with reference to the accompanying drawings. This electronic component mounting apparatus is a so-called multi-function chip mounter, and is configured to be able to mount various electronic components such as surface mount components such as chip capacitors and chip resistors, and multi-lead components such as flat pack ICs. FIG. 1 is a plan view of an electronic component mounting apparatus. As shown in FIG. 1, the electronic component mounting apparatus 1 includes a mounting apparatus main body 2 for mounting the supplied electronic component on a substrate, and a surface on the mounting apparatus main body 2. A first component supply device 3 that supplies small electronic components such as mounted components and a second component supply device 4 that supplies large electronic components such as multi-lead components to the mounting apparatus main body 2 are provided.
[0017]
The mounting apparatus body 2 includes a machine base 5, a substrate transport mechanism 6 having a set table 7 at the center of the machine base 5, and an XY stage 8 on which one or two mounting heads 9 are mounted. By the operation of the XY stage 8, the mounting head 9 faces the first component supply device 3 or the second component supply device 4 to pick up an electronic component, and this electronic component is further mounted on the substrate set on the set table 7. . When this operation is repeated and the mounting of the electronic components on the board is completed, the board is sent out on the transport path 10 by the board transport mechanism 6, and a new board is introduced into the set table 7 instead. .
[0018]
The first component supply device 3 has a large number of cassette-type tape feeders 11 arranged side by side so that the tip on the component supply side faces one side of the machine base 5 parallel to the transport path 10. That is, it is disposed so as to face the pickup area of the mounting head 9. Each tape feeder 11 stores electronic components in a state of being loaded on a carrier tape (not shown), and the electronic components are supplied one by one from the tip of the tape feeder 11.
[0019]
The second component supply device 4 is disposed on the other one side that intersects the one side of the machine base 5 facing the first component supply device 3 at a right angle. In the second component supply device 4, a large number of electronic components are arranged on the tray, and one or more trays are mounted on the pallet P, and the pallet P is set with the first component supply device 3. By facing the pickup position between the table 7 and the electronic component, the electronic component is supplied to the mounting apparatus body 2.
[0020]
On the other hand, a suction nozzle 12 for sucking an electronic component is detachably attached to the lower end portion of the mounting head 9, and the suction nozzle 12 can be exchanged according to the planar shape, weight, etc. of the electronic component. ing. In this case, the suction nozzle 12 for replacement is accommodated in a nozzle stocker 13 disposed on the upper surface of the machine base 5, and a plurality of types of suction nozzles 12 held in the mounting posture are arranged side by side in the nozzle stocker 13. It is set. In addition, a filter stocker 14 for stocking an air filter 16 described later is disposed adjacent to the nozzle stocker 13.
[0021]
Next, the mounting head 9 on which the air filter 16 is mounted will be described in detail with reference to FIG. As shown in the figure, the mounting head 9 is concealed by a head body 15 having a suction passage 31 formed in the shaft core, a suction nozzle 12 having a nozzle hole 32 formed in the shaft core, and a base 33 of the suction nozzle 12. In this manner, the air filter 16 is mounted on the lower end of the head body 15. The suction nozzle 12 is mounted on the mounting head 9 in an airtight manner. In this state, the nozzle hole 32 of the suction nozzle 12 and the suction passage 31 of the head main body 15 communicate with each other via the air filter 16. Further, the downstream end of the suction passage 31 communicates with a vacuum suction device via a vacuum line (both not shown).
[0022]
The head body 15 includes a stepped tubular member 34 having the suction passage 31 formed in the shaft core and a gripping mechanism 35 attached to the lower outer surface of the tubular member 34. The gripping mechanism 35 is fixed to the tubular member 34. The support block 36 and a pair of left and right grip arms 37, 37 that are rotatably supported by the support block 36. The lower half of the support block 36 is hollowed out in the shape of a truncated cone, and the inner circumferential surface of the circumferential wall (outer circumferential part) 38 of the hollowed-out portion is a portion where the suction nozzle 12 fits in an airtight manner. Yes. Further, the lower end portion of the thin tubular member 34 protrudes from the center of the cut-out portion, and the inside of the protruding portion (inner peripheral portion) 39 becomes the downstream end portion of the suction passage 31. The outer peripheral surface is a part where the air filter 16 is attached. That is, the base 33 of the suction nozzle 12 and the air filter 16 are accommodated in a space formed between the peripheral wall 38 and the protruding portion 39.
[0023]
Each grip arm 37 is rotatably supported by a support block 36 via a pin 40 at the upper and lower intermediate portions, and is urged by a compression spring 41 interposed between the support arm 36 and the upper portion. As a result, the lower part is rotated toward the suction nozzle 12 side. A roller 42 that contacts the suction nozzle 12 is attached to the lower part of each gripping arm 37, and the rollers 42, 42 of both gripping arms 37, 37 biased by the compression spring 41 are attached to the support block 36. The suction nozzle 12 is gripped. In this case, both rollers 42 and 42 are in contact with the upper inclined surface of the neck portion 43 of the suction nozzle 12 and grip the suction nozzle 12 so as to attract the upper side.
[0024]
The suction nozzle 12 includes a base 33 having an enlarged nozzle hole 32, a neck portion 43 that is continuous with the base, a collar portion 44 that is provided below the neck portion 43, and a collar portion 44 that extends from the neck portion 43. It is comprised with the straight part 45 penetrated and extended below. The lower end of the straight portion 45 is a portion that sucks electronic components, and the flange portion 44 is a portion that seats the suction nozzle 12 on the nozzle stocker 13. Further, the neck portion 43 is a portion where the suction nozzle 12 is gripped by the gripping mechanism 35 as described above.
[0025]
On the other hand, the base portion 33 accommodates the air filter 16 inside thereof, and is formed with a chamber portion 46 connected to the suction passage 31 of the head body 15 via the air filter 16, and the outer peripheral surface of the peripheral wall 38 of the support block 36 is formed. A tapered portion that is in close contact with the inner peripheral surface is formed. That is, the inner peripheral surface of the peripheral wall 38 formed in a truncated cone shape and the tapered portion are formed in a complementary shape, and when the suction nozzle 12 is gripped so as to be pulled upward by the gripping mechanism 35, The peripheral surface and the tapered portion are in close contact with each other, and the suction nozzle 12 is attached to the head body 15 in an airtight manner.
[0026]
The air filter 16 includes a filter main body 51 formed in a cylindrical shape and a filter holder 52 having the filter main body 51 mounted on the outer peripheral surface. The filter holder 52 is formed in a cap shape with a bottom, and is mounted on the protruding portion 39 of the tubular member 34 on the inner peripheral surface thereof, and the filter main body 51 is mounted on the outer peripheral surface thereof. Further, an O-ring 53 is incorporated in the upper inner peripheral surface of the filter holder 52, and the filter holder 52 is airtightly attached to the projecting portion 39. The O-ring 53 also serves as a locking member for the air filter 16 by engaging with a groove formed in the protruding portion 39.
[0027]
Furthermore, a plurality of through holes 54 are formed in the upper and lower intermediate portions of the filter holder 52, and the plurality of through holes 54 communicate with a plurality of small holes 39 a formed in the protruding portion 39. In this case, the plurality of through holes 54 and the plurality of small holes 39a are arranged at equal intervals in the circumferential direction. An annular groove 55 that connects a plurality of through holes 54 is formed on the outer peripheral surface of the filter holder 52. In this configuration, the suction air in the chamber portion 46 passes through the filter body 51 and flows into the suction passage 31 through the annular groove 55, the through hole 54 and the small hole 39 a. In addition, the code | symbol 56 in a figure is a latching protrusion formed in the lower end of the filter holder 52 (it mentions later for details).
[0028]
Next, with reference to FIGS. 3, 4, and 5, the replacement (mounting) procedure of the air filter 16 will be described. The mounting head 9 is supported by a head lifting mechanism (head moving mechanism) 21 mounted on the XY stage 8, and is lifted and lowered by the head lifting mechanism 21. On the other hand, the air filter 16 is set in a filter attaching / detaching mechanism 22 provided in the filter stocker 14. In these drawings, two filter attaching / detaching mechanisms 22 and 22 are provided, one that sets a replacement air filter 16 a and one that receives a used air filter 16 b from the mounting head 9.
[0029]
Each filter attaching / detaching mechanism 22 locks and unlocks the holding claw 24 that holds the air filter 16, the holding claw 24 that holds the air filter 16 and holds the holding claw 56, and the holding claw 25. It is comprised with the drive part 25 to operate | move. The head elevating mechanism 21 and the filter attaching / detaching mechanism 22 are connected to a controller 26, and the controller 26 controls the driving of both mechanisms 21, 22 to automatically replace the air filter 12 (details will be described later).
[0030]
FIG. 3 shows an operation of removing the used air filter 16b. In this case, the suction head 9 has already released the suction nozzle 12 onto the nozzle stocker 13. Although the air filter 16 a is set in the right side filter attaching / detaching mechanism 22, the air filter 16 is not set in the left side filter attaching / detaching mechanism 22. Further, the clamping claw 24 of the right filter attaching / detaching mechanism 22 is in the locked state, and the clamping claw 24 of the left filter attaching / detaching mechanism 22 is in the unlocked state.
[0031]
From this state, when the mounting head 9 approaches the left filter attaching / detaching mechanism 22 from the upper side and the air filter 16b hits the set base 23 (actually stops immediately before), the lowering of the mounting head 9 stops at the same time. The latching operation is performed so as to sandwich the latching projection 56. Next, the mounting head 9 is raised and the air filter 16b is left on the set table 23. Subsequently, as shown in FIG. 4, the mounting head 9 moves down to the upper part of the right filter attaching / detaching mechanism 22 and then descends again. When the protruding portion 39 of the mounting head 9 is inserted deeply into the air filter 16a due to this lowering, the mounting head 9 stops and simultaneously the clamping claw 24 is released. When the air filter 16a is mounted on the mounting head 9 in this manner, the mounting head 9 continues to rise again and picks up the suction nozzle 12 as shown in FIG.
[0032]
Thus, since the air filter 16 can be automatically replaced in the same manner as the suction nozzle 12, the air filter 16 can be replaced without stopping the operation of the electronic component mounting apparatus 1. For this reason, the replacement operation of the air filter 16 can be incorporated into a series of component mounting operations, and this replacement operation does not significantly affect the tact time in component mounting. In addition, the structure for automatic exchange can be simplified.
[0033]
Further, since the air filter 16 is provided at the lower end portion of the head main body 15 that is the mounting portion of the suction nozzle 12, the air filter 16 can be easily attached and detached, and the air filter as in the case of the suction nozzle 12 is provided. Management of 16 and the suction nozzle 12 does not become complicated. Further, dust does not adhere to or clog the suction passage 31 of the head main body 15 or the vacuum pipe leading to the vacuum suction device, and it is possible to prevent a reduction in suction performance. On the other hand, since the filter main body 51 of the air filter 16 is disposed on the outer peripheral surface of the protruding portion 39, the effective area of the filter main body 51 can be increased.
[0034]
The air filter may be attached / detached (replaced) manually instead of automatically. In addition, the air filter may be replaced periodically based on time, days, weeks, months, etc., for example, based on the detection value of a vacuum degree detection sensor provided on the vacuum suction device side. And may be performed. Furthermore, the present invention can also be applied to the mounting head of the high-speed chip mounter described in the prior art.
[0035]
【The invention's effect】
As described above, according to the mounting head of the present invention , the air filter can be replaced irrespective of the replacement of the suction nozzle, and the presence / absence of the air filter can be directly recognized, so that the air filter itself can be easily managed. This can be easily replaced. In addition, the air filter can be provided at a position where the dust removal effect is best exhibited, and dust can be efficiently removed.
[0036]
Moreover, according to the electronic component mounting apparatus of the present invention, since the air filter can be automatically replaced, it is possible to reduce time and effort for replacement and time for replacement.
[Brief description of the drawings]
FIG. 1 is a plan view of an electronic component mounting apparatus on which a mounting head according to an embodiment of the present invention is mounted.
FIG. 2 is a cross-sectional view of the mounting head according to the embodiment.
FIG. 3 is a sectional view showing an automatic air filter replacement procedure (1).
FIG. 4 is a cross-sectional view showing a procedure (2) for automatically replacing an air filter.
FIG. 5 is a cross-sectional view showing an automatic air filter replacement procedure (3).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 2 Mounting main body 9 Mounting head 12 Adsorption nozzle 14 Filter stocker 15 Head main body 16 Air filter 21 Head raising / lowering apparatus 22 Filter attachment / detachment apparatus 31 Suction passage 32 Nozzle hole 33 Base 38 Perimeter wall 39 Projection part 51 Filter main body 52 Filter holder 54 Through hole 55 Annular groove

Claims (5)

In an electronic component mounting head comprising: a head body having a suction passage formed therein; and a suction nozzle that is detachably attached to a lower end portion of the head body and has a nozzle hole that communicates with the suction passage in an axis.
An electronic component mounting head , wherein an air filter is detachably provided on an outer peripheral surface of an upstream end portion of the suction passage. The lower end portion of the head body has an inner cylinder portion that forms an upstream end portion of the suction passage, and an outer cylinder portion to which a base portion of the suction nozzle is attached,
2. The electronic component mounting head according to claim 1, wherein an inner peripheral surface of the air filter is mounted on the inner cylinder portion. In an electronic component mounting head comprising: a head body having a suction passage formed therein; and a suction nozzle that is detachably attached to a lower end portion of the head body and has a nozzle hole that communicates with the suction passage in an axis.
The lower end portion of the head body has an inner cylinder portion that forms an upstream end portion of the suction passage, and an outer cylinder portion to which a base portion of the suction nozzle is attached,
The air filter includes a filter body formed in a cylindrical shape, a bottomed filter holder that is airtightly attached to the inner cylinder portion on an inner peripheral surface, and a filter main body is attached to the outer peripheral surface;
A mounting head for electronic parts, wherein the filter holder is formed with a plurality of through holes having one end opened to the outer peripheral surface and the other end communicating with the suction passage.   4. The electronic component mounting head according to claim 3, wherein an annular groove connected to the plurality of through holes is formed on an outer peripheral surface of the filter holder. An electronic component mounting apparatus comprising the electronic component mounting head according to claim 1,
A head moving mechanism for moving the mounting head;
The air filter is configured to be capable of being held, and has a filter attaching / detaching mechanism that relatively approaches the mounting head from which the suction nozzle is detached and attaches / detaches the air filter to / from the mounting head. Electronic component mounting device.

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