JP2019102478A - Suction nozzle - Google Patents

Abstract

To provide a suction nozzle equipped with a metal filter.SOLUTION: A suction nozzle includes: a pipe member which is provided with a nozzle tip portion having a suction port at a tip and a shaft portion formed integrally with the nozzle tip portion; a cylindrical sleeve which movably holds the pipe member; a pin which penetrates the pipe member and the sleeve; a metal filter which is provided on the pipe member via the pin so as to be at an opposite side to the nozzle tip portion; and a pair of long holes which are formed between the nozzle tip portion and the metal filter on the pipe member so as to guide the pin in a passage direction. As the pipe member moves in such a direction that the nozzle tip portion enters the sleeve, the long holes are partially opened to the outside of the sleeve.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a suction nozzle attached to a mounting head provided in an electronic component mounting machine for mounting a component held by suction on a substrate.

  The electronic component mounting machine has a mounting head provided with a suction nozzle for mounting the electronic component on the circuit board, and the electronic component suctioned and held by the suction nozzle is taken out from the component supply unit to the circuit substrate It is attached. Since there are various electronic components having different sizes and shapes, a plurality of suction nozzles are prepared in the electronic component mounting machine, and the suction nozzles are replaced as needed. The parts handled by the suction nozzle include, for example, those stored in a part tape. Since the top tape is peeled off at the time of taking out such a component tape, dust and dirt such as paper fibers of the bottom tape may fly up into the mounting machine, and a suction nozzle for sucking and holding the component may suction it. Therefore, there are some electronic component mounting machines in which a filter is attached to the nozzle holder side and in which a filter is attached in a suction nozzle as disclosed in Patent Documents 1 and 2 below.

JP, 2009-252927, A Japanese Patent Application Laid-Open No. 2002-301677

  In the suction nozzle described in Patent Document 1, a partition portion in which a plurality of through holes are formed is integrally formed on a nozzle tip member provided with a suction port for sucking a component, and the partition portion functions as a filter Is configured. However, the nozzle tip member of the suction nozzle is, for example, a very thin hole having an inner diameter of 1 to 2 mm or less, and it is extremely difficult to form a partition portion having a filter function inside thereof. Further, even if such a suction nozzle is present, if a filter is provided in the pore, clogging easily occurs and a stable component holding power can not be obtained. On the other hand, although the structure which incorporates the filter member which fixed the filter to the holding body is disclosed by the said patent document 2, it is difficult to employ | adopt this structure to a very small adsorption nozzle.

  Then, in order to solve this subject, an object of this invention is to provide the adsorption nozzle provided with the metal filter which is easy to handle.

  A suction nozzle according to the present invention comprises a pipe member including a nozzle tip having a suction port at its tip and a shaft formed integrally with the nozzle tip, and a cylindrical sleeve for movably holding the pipe member. A pin passing through the pipe member and the sleeve, a metal filter provided on the opposite side of the nozzle tip with respect to the pipe member via the pin, and between the nozzle tip and the metal filter And a pair of elongated holes formed in the pipe member so as to guide the pin along the flow path direction, the movement of the pipe member in the direction in which the nozzle tip enters the sleeve, the length A portion of the bore is configured to open out of the sleeve.

  According to the above configuration, a pair of elongated holes are formed in the pipe member so as to guide the pin along the flow path direction between the nozzle tip and the metal filter, and the pipe tip is the nozzle tip inside the sleeve When moving in the direction of entering into the sleeve, a part of the long hole becomes an exhaust port opened to the outside of the sleeve, so that water or compressed air is fed from the tip of the nozzle so that the flow spouts from the exhaust port The dust in the suction nozzle attached to a metal filter etc. can be discharged outside by this.

It is an internal structure figure showing an example of a mounting head. It is a perspective view showing one embodiment of a suction nozzle. It is a sectional view showing one embodiment of a suction nozzle. It is a sectional view showing one embodiment of a suction nozzle. It is a sectional view showing one embodiment of a suction nozzle. It is sectional drawing which showed other embodiment of the adsorption nozzle.

  Next, an embodiment of a suction nozzle according to the present invention will be described below with reference to the drawings. In the present embodiment, a suction nozzle used in an electronic component mounting machine for mounting an electronic component on a circuit board will be described as an example. In the electronic component mounting machine, a substrate transported in order is positioned in the mounting machine, and a predetermined electronic component is taken out from a component supply device for supplying electronic components and mounted on the substrate. The electronic component mounting machine is provided with a suction nozzle capable of suctioning and holding the electronic component on a movable mounting head. The suction nozzle enables suction holding of the electronic component by vacuuming in a state where the suction port is pressed against the electronic component.

  FIG. 1 is an internal structural view showing an example of the mounting head. First, the mounting head will be briefly described. The mounting head 1 is attached to the X-axis slide 2, and the X-axis slide 2 is mounted on the Y-axis slide 3. Both the X-axis slide 2 and the Y-axis slide 3 make the mounting head 1 movable on the XY plane by driving a ball screw mechanism with a servo motor or a linear motor. A turning motor 4 and a lifting motor 5 are attached to the mounting head 1 with the output shaft facing vertically downward. A rotating shaft 11 extending downward is connected to the turning motor 4, and a nozzle holder 6 is fixed to the rotating shaft 11. A plurality of suction nozzles 7 are attached to the nozzle holder 6 on the circumference centering on the axial center of the rotating shaft 11.

  The suction nozzle 7 is integrated with the syringe 12 which can slide the nozzle holder 6 in the vertical direction in a detachable manner. The syringe 12 is urged upward by a spring 19 between the nozzle gear 13 and the nozzle holder 6, and the suction nozzle 7 is normally disposed at the height shown. Then, the rotation of the servomotor 17 is transmitted to the nozzle gear 13 via the gears 14, 15 and 16 so that all the suction nozzles 7 rotate simultaneously.

  A screw shaft 21 extending downward is connected to the lifting motor 5. The screw shaft 21 is rotatably supported by bearings on the upper and lower frames 22 and 23, and the nozzle lever 25 is slidably attached to a vertical guide rod 24 parallel to the screw shaft 21. The nozzle lever 25 is integrally formed with the nut 26 screwed with the screw shaft 42, and moves up and down the suction nozzle 7 through the hand portion 251 by moving up and down by driving the elevating motor 28. There is.

  Next, FIG. 2 is a perspective view showing the suction nozzle 7, and FIGS. 3 to 5 are cross-sectional views showing the suction nozzle 7. The suction nozzle 7 includes a pipe member 30 having a suction port 35 in contact with the electronic component at its tip, and the pipe member 30 is held by a sleeve 40. The pipe member 30 is integrated with the cylindrical shaft member 31 by fitting the nozzle tip member 32 at one end thereof by press fitting or the like. The pipe member 30 is formed with a series of flow passages 33 and 34 penetrating the inside of the shaft member 31 and the nozzle tip member 32, and the inner diameter of the flow passage 34 of the nozzle tip member 32 is smaller than the flow passage 33 of the shaft member 31. It is getting smaller.

  In the sleeve 40 for holding the pipe member 30 inside, a circular flange portion 42 which is expanded in the radial direction is formed at one end portion of the cylindrical portion 41. The flange portion 42 is configured to form a background at the time of imaging the electronic well component sucked and held by the suction port 35 of the nozzle tip member 32. Further, in the flange portion 42, a notch 43 for preventing rotation when the suction nozzle 7 is stored in the nozzle stocker is formed. The suction nozzle 7 is stored with the nozzle tip member 32 side inserted in the holding hole provided in the nozzle stocker, but the notch 43 is fitted to the protrusion provided in the vicinity of the holding hole to prevent rotation. There is.

  In the suction nozzle 7, the pipe member 30 is slidably inserted into the sleeve 40, and the pin 51 penetrates both in the radial direction. The sleeve 40 is formed with a pair of round holes 45 whose diameter is matched so as to press-fit the pin 51, and the pipe member 30 is formed with elongated holes 36, 37 in the shaft member 31 along the flow path direction. ing. In the suction nozzle 7, the pipe member 30 moves in the flow channel direction (vertical direction in the drawing) with respect to the sleeve 40. At this time, the range in which the pin 51 relatively moves in the long holes 36 and 37 is the pipe member It has a range of motion of 30. The long holes 36 and 37 have different lengths because they are designed based on the short hole 37 having a short dimension in advance in consideration of machining tolerances.

  By the way, since the suction nozzle 7 suctions and holds the electronic component by air suction, it suctions dust and dirt floating in the electronic component mounting machine. Then, if the suctioned dust accumulates in the air circuit of the mounting head 1, the holding force of the electronic component by the suction nozzle 7 may be reduced. Therefore, maintenance such as dust removal is required, but filter replacement in the air circuit is time-consuming, and a line stop and a spare mounting head are required. Therefore, the metal filter 52 is built in the suction nozzle 7 of the present embodiment.

  In the metal filter 52, a plurality of minute holes 521 are formed in a circular plate by an etching method. The metal filter 52 is provided on the opposite side of the nozzle 51 to the pin 51. That is, the suction nozzle 7 is located on the attachment side to the mounting head 1. Accordingly, in the suction nozzle 7, the long holes 36 and 37 for guiding the relative movement of the pin 51 are located between the nozzle tip 31 and the metal filter 52 structurally.

  The shaft member 31 is provided with an assembly portion 38 whose inner diameter is expanded by hollow-rolling at an attachment side end where the metal filter 52 is attached. Since the inner diameter of the mounting portion 38 is larger than that of the metal filter 52, the metal filter 52 can be inserted inside the shaft member 31 without being caught. The metal filter 52 is positioned with its peripheral portion hooked on the step surface 381 at the inner side end of the mounting portion 38. A collar 53, which is a tubular stopper, is press-fit into the mounting portion 38, and the metal filter 52 is attached such that the peripheral portion thereof is sandwiched between the step surface 381 and the collar 53.

  In the collar 53 pressed into the mounting portion 38, an interference with an enlarged outer diameter is formed on the open end side of the shaft member 31. On the other hand, on the outer peripheral side surface of the end portion of the shaft member 31, a relief portion 39 whose outer diameter is reduced is formed. That is, even if the open end of the shaft member 31 bulges outward due to the interference of the collar 53, the sliding resistance of the shaft member 31 sliding in the sleeve 40 is high due to the deformation at the relief portion 39. It is configured to avoid the problem.

  The sleeve 40 is provided with an open portion 46 whose inner diameter is expanded by hollowing at the mounting end opposite to the flange portion 42. As shown in FIG. 4, the open portion 46 is formed to overlap a part of the short elongated hole 37 when the pipe member 30 protrudes upward in the drawing with respect to the sleeve 40. The suction nozzle 7 enables nozzle cleaning by feeding water or compressed air from the suction port 35 of the nozzle tip member 32 as indicated by the arrow. Therefore, in addition to the function of guiding the relative movement of the pin 51, in the present embodiment, the long holes 36 and 37 have a configuration in which a part thereof also functions as a discharge port.

  In particular, although the suction nozzle 7 is not shown in detail, the upper end of the pipe member 30 and the sleeve 40 is shown in FIG. 3 in a state where the pipe member 30 protrudes downward due to the mounting structure on the mounting head 1 side. It is preferred that they be aligned as shown. Further, in the present embodiment, since the metal filter 52 is attached in the pipe member 30, the extension of the long holes 36 and 37 to the upper end side is limited. Therefore, even if the pipe member 30 moves so as to project upward from the sleeve 40 as shown in FIGS. 2 and 4, the short elongated hole 37 does not reach a position beyond the upper end of the sleeve 40 due to the relationship with the movement amount. It becomes a structure. Therefore, in order to remove dust remaining in the pipe member 30 efficiently, a configuration is employed in which a part of the long hole 37 is an outlet opened to the outside of the sleeve 40 through the opening 46.

  According to the suction nozzle 7 of the present embodiment, the suction nozzle 7 is connected to the vacuum pump via the flow path of the mounting head 1, and evacuation is performed at a predetermined timing by switching the valve. While the mounting head 1 moves on the XY plane and moves up and down at a predetermined position, the suction nozzle 7 sucks and holds the electronic component at the suction port 35 at the tip by vacuum suction, Release the electronic component from the mouth 35. The suction nozzle 7 is detachably attached to the lower end side of the syringe 12 using both ends of the pin 51 protruding to the outside. At this time, the sleeve 40 is positioned, and the pipe member 30 inserted therein is biased downward by a spring (not shown) and is in a state of being protruded. Therefore, when the electronic component is held by suction or released, the impact when the suction port 35 hits due to the compression of the spring is alleviated.

  Thus, the suction of the electronic component is performed by the suction nozzle 7. However, since the evacuation for that purpose is performed before contacting the electronic component, the dust and dirt floating in the mounting machine may be sucked. However, according to the suction nozzle 7, the dust entering from the suction port 35 flows to the flow path 34 of the nozzle tip member 32 and the flow path 33 of the shaft member 31 and is captured by the metal filter 52. Therefore, dust can be prevented from entering the air circuit of the mounting head 1.

  The metal filter 52 that catches dust needs to be replaced and cleaned because it is repeatedly used and causes clogging. Removal of the metal filter 52 requires removal of the collar 53, which uses an extraction tool with a threaded portion at its tip. That is, by rotating the extraction tool, the threaded portion is screwed in such a way as to bite into the inner wall of the collar 53. Then, by pulling the extraction tool in the axial direction, the collar 53 can be integrated with the threaded portion and removed from the assembling portion 38 of the pipe member 30. The collar 53 is a disposable part that finishes its role by such removal.

  The metal filter 52 is replaced or cleaned with another one, and is again assembled to the mounting portion 38 of the pipe member 30 by a new collar 53. On the other hand, according to the suction nozzle 7 of the present embodiment, it is also possible to clean the metal filter 52 as it is mounted. In the suction nozzle 7 at the time of cleaning, as shown in FIG. 4, the pipe member 30 is in a state in which the attachment side end of the metal filter 52 protrudes from the sleeve 40. At this time, a part of the long hole 36 serves as a discharge port which has come out of the sleeve 40, and a part of the long hole 37 overlaps the position of the open portion 46 and serves as a discharge port. Therefore, when water or compressed air is fed into the suction nozzle 7 from the suction port 35, the flow can be spouted from part of the long holes 36, 37 having a large opening area. Therefore, not only the wall surfaces of the flow paths 33 and 34, dust attached to the surface of the metal filter 52 is allowed to flow into compressed air without passing through the metal filter 52, and is discharged from the suction nozzle 7.

  By the way, if it is the adsorption | suction nozzle 7 which can be cleaned like this embodiment, the metal filter 52 may be fixed. FIG. 6 is a cross-sectional view of a suction nozzle which is modified at that point. The suction nozzle 8 is the same as the suction nozzle 7 except for the mounting structure of the metal filter 55, and therefore, the same reference numerals are given to the common configuration. In the suction nozzle 8, at an end portion of a shaft member 31 constituting the pipe member 30, an assembling portion 56 whose inner diameter is expanded by hollowing is formed in a step shape. Specifically, an insertion portion 561 whose inside diameter is larger than the outside diameter of the metal filter 55 and a pressing portion 562 whose inside diameter is smaller are formed, and further, a groove-shaped positioning portion 563 into which the metal filter 55 is fitted. Is formed.

  In the metal filter 55, a plurality of minute holes 551 are formed in a circular plate by an etching method, and a small notch portion 552 is formed in a part of the peripheral portion. When the metal plate 55 passes through the small-diameter push-in portion 562, the notch portion 552 elastically deforms the metal plate 55 so that the metal plate 55 can be easily assembled to the positioning portion 563. Although the metal filter 55 can not be easily removed once fitted in the positioning portion 563, the suction nozzle 8 of the present embodiment flows by feeding water or compressed air from the suction port 35 as described above. Dust attached to the inside of the passages 33 and 34 and the metal filter 55 can be discharged from the long holes 36 and 37 to the outside.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, in the embodiment, as shown in FIG. 3, the open end 46 is formed because the upper end of the pipe member 30 and the upper end of the sleeve 40 are aligned, but the pipe member 30 protrudes upward in the drawing and the long hole 37 If it is the structure which comes out, the opening part 46 may not be.
Furthermore, although the nozzle tip member 32 of the above embodiment has a small suction port 35, it may be, for example, an expanded trumpet shape larger than the cross section of the flow path 33 of the shaft member 31.

DESCRIPTION OF SYMBOLS 1 ... Mounting head 6 ... Nozzle holder 7 ... Adsorption nozzle 30 ... Pipe member 31 ... Shaft member 32 ... Nozzle tip member 33, 34 ... Flow path 35 ... Adsorption port 36, 37 ... Long hole 38 ... Assembly part 40 ... Sleeve 46 ... Open part 51 ... Pin 52 ... Metal filter 53 ... Color

Claims (4)

A pipe member comprising a nozzle tip having a suction port at its tip and a shaft formed integrally with the nozzle tip;
A cylindrical sleeve for movably holding the pipe member;
A pin passing through the pipe member and the sleeve;
A metal filter provided on the opposite side of the nozzle tip with respect to the pipe member via the pin;
Between the nozzle tip and the metal filter, a pair of elongated holes formed in the pipe member so as to guide the pin along the flow path direction;
A suction nozzle configured to move a part of the elongated hole to the outside of the sleeve by the movement of the pipe member in the direction in which the nozzle tip portion enters the sleeve. A step-shaped seat formed on the inner circumferential surface of the pipe member for disposing the metal filter;
The suction nozzle according to claim 1, further comprising: a tubular filter holding member which is fitted in the pipe member and positions the metal filter in the seat portion.   The suction nozzle according to claim 2, wherein the filter holding member is a component that is pressed into the pipe member and removable by internal threading. The adsorption nozzle according to any one of claims 1 to 3, wherein the metal filter is formed by micropores by etching.

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