JP2017027997A - Component loading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a negative pressure of sufficient magnitude to be applied to an intake passage of a suction nozzle, in a component loading device.SOLUTION: A suction nozzle 10 is provided with a suction auxiliary part 16b to connect an upstream side part and a downstream side part in an intake passage 12 with respect to a pin 26. The cross sectional area (an area of a cut surface of the intake passage 12 cut in a direction orthogonal to the extension direction of passage) of the intake passage 12 is narrowed by the pin 26. But gas can detour this pin 26 and pass through the suction auxiliary part 16b. Consequently, sufficient flow rate can be ensured even at a part of the intake passage 12 where the pin 26 traverses. As a result, negative pressure of sufficient magnitude can be applied to the intake passage 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a component mounting apparatus for mounting electronic components on a substrate.

  As a component mounting device, for example, a component mounting device including a suction nozzle as described in Patent Document 1 is known. As shown in FIG. 7, the suction nozzle 200 includes a nozzle body 202 including a wall surrounding the intake passage 210, a sleeve 204 that slidably houses the nozzle body 202 along the direction in which the intake passage 210 extends, A pair of elongated holes 206 provided in the nozzle body 202 along the direction in which the intake passage 210 extends, and pins 208 that cross the intake passage 210 and pass through the pair of elongated holes 206 are provided. The pin 208 is fixed to the sleeve 204, and both ends protrude to the outside of the sleeve 204. The protruding both ends are used when integrating with the nozzle holder. In the suction nozzle 200, when the nozzle body 202 slides along the direction in which the intake passage 210 extends with respect to the sleeve 204, the nozzle body 202 is guided and slid by a pair of elongated holes 206 through which pins 208 are inserted. Move.

JP 2013-49097 A

  In recent years, the size of the suction nozzle 200 has been reduced with the downsizing of electronic components that are attracted to the tip. For example, it is known that the inner diameter of the intake passage 210 and the diameter of the pin 208 are around 1 mm. As the size is reduced, the ratio of the cross-sectional area of the pin 208 that crosses the intake passage 210 to the cross-sectional area of the intake passage 210 (the area of the cut surface obtained by cutting the intake passage in a direction orthogonal to the direction in which the passage extends). (See FIG. 8), the negative pressure applied to the intake passage 210 may not be sufficiently secured. For example, a part such as a large-capacity capacitor having a curved surface attracted to the tip of the suction nozzle 200 is likely to leak, and therefore, if the negative pressure applied to the intake passage 210 cannot be secured sufficiently, the suction is performed. Later, the posture was shifted, and it was not possible to mount it on the substrate with high accuracy.

  The present invention has been made to solve such a problem, and in a component mounting apparatus including a suction nozzle including an intake passage and a pin crossing the intake passage, a sufficiently large negative pressure is applied to the intake passage. The main purpose is to be able to grant.

  The component mounting apparatus of the present invention includes a suction nozzle that sucks an electronic component at the tip by negative pressure, and mounts the electronic component on a substrate. The suction nozzle includes an intake passage and the intake passage. And a suction auxiliary portion that is provided on a wall surrounding the intake passage and connects the upstream side and the downstream side of the pin in the intake passage.

  In this component mounting apparatus, the suction auxiliary portion of the suction nozzle is provided so as to connect the upstream side and the downstream side of the pin in the intake passage. The intake passage has a cross-sectional area (area of a cut surface obtained by cutting the intake passage in a direction perpendicular to the direction in which the passage extends) narrowed by a pin. However, the gas can bypass this pin and pass through the intake assist section. Therefore, a sufficient flow rate can be secured even in the portion of the intake passage where the pin crosses. As a result, a sufficiently large negative pressure can be applied to the intake passage.

  In the component mounting apparatus of the present invention, the pin penetrates the wall surrounding the intake passage and the end protrudes to the outside, and the protruded end is used when integrating with the nozzle holder It may be. In this case, a relatively large force may be applied to the end of the pin, but since this pin penetrates the wall surrounding the intake passage, the strength is higher than when the pin is joined to the outer surface of the wall. High and less likely to break. Note that both end portions of the pin may protrude outward, or only one end portion may protrude outward.

  The component mounting device according to the present invention includes a nozzle body including the wall surrounding the intake passage, a sleeve for slidably storing the nozzle body along a direction in which the intake passage extends, and an extension of the intake passage. A pair of elongated holes provided in the nozzle body along a direction, and the pin may be fixed to the sleeve, traverse the intake passage, and pass through the pair of elongated holes. In this way, when the nozzle body slides along the direction in which the intake passage extends with respect to the sleeve, the nozzle body slides while being guided by the pair of elongated holes through which the pins are inserted. There is no blur.

  In the component mounting device of the present invention including the nozzle body, the sleeve, and the pair of elongated holes, the intake auxiliary portion is separated from the pair of elongated holes along the direction in which the intake passage extends. It may be a hole provided in. By so doing, since it is only necessary to make a hole in the nozzle body when providing the intake assisting portion, it can be easily manufactured as compared with the case where the intake assisting portion is a groove provided in the nozzle body.

  In the component mounting apparatus of the present invention including the nozzle body, the sleeve, and the pair of elongated holes, the intake auxiliary portion is provided in a pair in the nozzle body, and is in a direction orthogonal to a direction in which the intake passage extends. When the cross section of the intake passage where the pin is cut is viewed, the pair of long holes are in a two-fold symmetrical relationship about the center line of the intake passage, and the pair of intake auxiliary portions are The pair of long holes may be provided at positions rotated 90 degrees around the center line of the intake passage. By doing so, the pair of intake assist portions are formed in a well-balanced manner with the pair of elongated holes, so that the strength of the nozzle body can be increased compared to the case where these are formed offset.

FIG. 3 is an explanatory diagram showing an overall configuration of a component mounting apparatus 100. FIG. 3 is a perspective view of a head unit 110. The front view of the suction nozzle 10. FIG. FIG. 3 is a longitudinal sectional view of the suction nozzle 10. AA sectional drawing of FIG. Explanatory drawing which shows the attachment procedure of the suction nozzle. The longitudinal cross-sectional view of the conventional suction nozzle 200. FIG. XX sectional drawing of FIG.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of the component mounting apparatus 100, and FIG. 2 is a perspective view of the head unit 110. 3 to 5 are explanatory views of the suction nozzle 10, FIG. 3 is a front view, FIG. 4 is a longitudinal sectional view, and FIG. 5 is a sectional view taken along line AA in FIG.

  As shown in FIG. 1, the component mounting apparatus 100 includes a board transfer device 104 mounted on a base 102, a head unit 110 that can move on an XY plane, and a head 120 that is detachably attached to the head unit 110. A mark camera 130 for photographing the substrate 101 from above, a parts camera 132 for photographing the electronic component sucked by the suction nozzle 10 from below, and a component supply device 150 for supplying the electronic component to be mounted on the substrate 101. Yes.

  The substrate transport device 104 transports the substrate 101 from left to right by conveyor belts 108 and 108 (only one is shown in FIG. 1) attached to a pair of front and rear support plates 106 and 106, respectively.

  The head unit 110 is attached to the X-axis slider 112, and moves in the left-right direction as the X-axis slider 112 moves in the left-right direction along the guide rails 114, 114, and the Y-axis slider 116 moves in the guide rail 118, It moves in the front-rear direction as it moves in the front-rear direction along 118. For this reason, the head unit 110 is movable on the XY plane. Each slider 112, 116 is driven by a servo motor (not shown).

  The head 120 is detachably attached to the head unit 110. The suction nozzle 10 uses pressure to suck a component at the tip of the nozzle or release a component sucked at the tip of the nozzle. The head 120 is a member having a substantially columnar appearance, and has a plurality (here, 12) of suction nozzles 10 below. The suction nozzle 10 is integrated with a nozzle holder 30 (see FIG. 3) extending in the vertical direction. Since the nozzle holder 30 is covered by the cover of the head 120, it does not appear in FIG. The nozzle holder 30 includes a lever near the upper end. When the lever is pressed, the nozzle holder 30 is lowered together with the suction nozzle 10, and when the lever is released, the nozzle holder 30 and the suction nozzle 10 are not shown. Return to the home position by the spring force. Moreover, the nozzle holder 30 can be rotated. Furthermore, each suction nozzle 10 is provided with a pressure switching valve (not shown) that switches whether negative pressure or atmospheric pressure is supplied to the nozzle tip.

  The mark camera 130 is attached to the lower surface of the X-axis slider 112. The mark camera 130 is a camera that reads a mark attached to the substrate 101 at a lower part of the imaging region. This mark indicates the reference position on the substrate 101. This reference position is used when the component sucked by the suction nozzle 10 is mounted at a desired position on the substrate 101.

  The parts camera 132 is disposed on the front side of the substrate transfer apparatus 104. When the suction nozzle 10 that sucks a part passes above the parts camera 132, the parts camera 132 captures the state of the part sucked by the suction nozzle 10. The image photographed by the parts camera 132 is used to determine whether or not the part is normally attracted to the suction nozzle 10.

  The component supply device 150 is attached in front of the component mounting device 100. The component supply device 150 has a plurality of slots, and a feeder 152 can be inserted into each slot. A reel 154 around which a tape is wound is attached to the feeder 152. On the surface of the tape, parts are held in a state of being aligned along the longitudinal direction of the tape. These parts are protected by a film covering the surface of the tape. Such a tape is fed backward by a sprocket mechanism (not shown), and is disposed at a predetermined position in a state where the film is peeled off and the parts are exposed. The predetermined position is a position where the suction nozzle 10 can suck the component. The suction nozzle 10 that picks up a component at the predetermined position can mount the component at a predetermined position on the substrate 101.

  In addition, the component mounting apparatus 100 includes a nozzle stocker 134 and the like. The nozzle stocker 134 is a box that stocks a plurality of types of suction nozzles 10, and is arranged next to the parts camera 132. The suction nozzle 10 is replaced with one suitable for the type of substrate on which the component is mounted and the type of component.

  The operation of the component mounting apparatus 100 is controlled by a controller 160. The controller 160 controls the component mounting apparatus 100 in response to an instruction from a management computer (not shown) that manages the production job of the substrate 101. The production job defines which parts are to be mounted from which slot position feeders in what order on which board type board 101 in the component mounting apparatus 100, and how many boards 101 are mounted as such. It is a thing.

  Here, the suction nozzle 10 will be described in detail below with reference to FIGS. The suction nozzle 10 includes a nozzle body 14 and a sleeve 20 that slidably houses the nozzle body 14 along the direction in which the intake passage 12 extends. The intake passage 12 is connected to a vacuum pump via a pressure switching valve (not shown).

  The nozzle body 14 is obtained by inserting and fixing a nozzle tip member 18 to a cylindrical shaft member 16. The shaft member 16 is a member that functions as a wall surrounding the intake passage 12 and has a pair of long holes 16a. The pair of long holes 16 a are formed so as to be long along the direction in which the intake passage 12 extends, and are provided at positions that are two-fold symmetrical about the center line of the intake passage 12. Further, the shaft member 16 has a pair of intake auxiliary portions 16b. The pair of intake auxiliary portions 16b are holes formed so as to be elongated along the direction in which the intake passage 12 extends, and are provided at positions where the pair of elongated holes 16a are rotated 90 degrees about the center line of the intake passage 12 as an axis. It has been.

  The sleeve 20 includes a cylindrical portion 22, a disk portion 24, and a pin 26. The cylindrical portion 22 slidably holds the shaft member 16 of the nozzle body 14. This cylindrical portion 22 also serves as a wall surrounding the intake passage 12. The disk portion 24 is formed to have a larger diameter than a nozzle holding hole 134a (see FIG. 6) provided in the nozzle stocker 134. The disk portion 24 is caught around the nozzle holding hole 134a when the tip side of the suction nozzle 10 is inserted into the nozzle holding hole 134a. The disk portion 24 is provided with an engagement hole (vertical hole) (not shown). When the suction nozzle 10 is inserted into the nozzle holding hole 134a, the engagement hole engages with a projection (not shown) provided around the nozzle holding hole 134a, and the suction nozzle 10 rotates in the nozzle holding hole 134a. It plays a role to prevent you from doing. The pin 26 penetrates the cylindrical portion 22 in a direction orthogonal to the axial direction, and is fixed to the cylindrical portion 22 in that state. The pin 26 passes through the pair of long holes 16 a provided in the shaft member 16 while traversing the intake passage 12. Further, both ends of the pin 26 protrude outside the sleeve 20. The pair of intake auxiliary portions 16 b provided on the shaft member 16 connects the upstream side and the downstream side of the pin 26 in the intake passage 12.

  In the suction nozzle 10, when the shaft member 16 of the nozzle body 14 slides along the extending direction of the intake passage 12 with respect to the cylindrical portion 22 of the sleeve 20, the nozzle body 14 has a pair of long lengths through which the pins 26 are inserted. It slides while being guided by the hole 16a.

  The suction nozzle 10 is detachably attached to the lower end side of the nozzle holder 30 by using both ends of a pin 26 protruding outside. The nozzle holder 30 is mainly composed of a nozzle shaft 32 formed in a generally cylindrical shape. At the lower end of the nozzle shaft 32, a pair of L-shaped notches 32a (only one of them appears in FIG. 3) is provided. Inside the nozzle shaft 32, a tube 34 having a reduced diameter on the lower end side and an inner spring 36 that urges the tube 34 toward the nozzle tip side are disposed. The tube 34 has a pair of long holes 34 a at positions that are two-fold symmetric about the center line of the intake passage 12. A pin 33 that passes through the nozzle shaft 32 in a direction orthogonal to the axial direction is inserted into the pair of long holes 34a. A ring 35 for preventing the pin 33 from coming off is fitted into the nozzle shaft 32. The tube 34 presses the shaft member 16 of the nozzle body 14 toward the nozzle tip side by the urging force of the inner spring 36. Further, when the tube 34 slides in the nozzle shaft 32 along the direction in which the intake passage 12 extends, the tube 34 is guided and slid by a pair of elongated holes 34 a through which the pins 33 are inserted. On the outer periphery of the nozzle shaft 32, a movable member 38 formed in a generally cylindrical shape is mounted so as to be movable along the direction in which the intake passage 12 extends. The movable member 38 is provided with a flange 38a at the lower end. The nozzle shaft 32 has a spring receiving portion 32b slightly below the position where the pin 33 is inserted. An outer spring 40 is provided between the spring receiving portion 32 b and the flange 38 a of the movable member 38.

  A method of attaching the suction nozzle 10 to the nozzle holder 30 will be described below with reference to FIG. First, the nozzle holder 30 is disposed immediately above the desired suction nozzle 10 stocked in the nozzle holding hole 134a of the nozzle stocker 134 (see FIG. 1) (see FIG. 6A). At this time, the longitudinal groove portions of the pair of L-shaped notches 32 a are opposed to both ends of the pin 26 of the suction nozzle 10. Next, the nozzle holder 30 is lowered, and both ends of the pin 26 of the suction nozzle 10 are inserted into the longitudinal groove portion of the L-shaped notch 32a (see FIG. 6B). At this time, the pin 26 resists the biasing force of the outer spring 40 and presses the movable member 38 against the spring receiving portion 32b. In this state, the nozzle shaft 32 is rotated so that both ends of the pin 26 are inserted into the lateral groove portions of the L-shaped notches 32a (see FIG. 6C). Thereafter, the nozzle holder 30 is raised. Accordingly, the pin 26 of the suction nozzle 10 is sandwiched between the lateral groove portion of the L-shaped notch 32 a and the flange 38 a of the movable member 38 by the urging force of the outer spring 40. Note that the operation of removing the suction nozzle 10 from the nozzle holder 30 is the reverse of this operation, and thus the description thereof is omitted.

  Next, an operation in which the controller 160 of the component mounting apparatus 100 mounts components on the board 101 based on the production job will be described. First, the controller 160 sequentially sucks the components supplied from the feeder 152 to the plurality of suction nozzles 10 of the head unit 110. Specifically, the controller 160 controls the X-axis slider 112 and the Y-axis slider 116 to place the first suction nozzle 10 directly above a desired component. Next, the controller 160 lowers the first suction nozzle 10 and supplies negative pressure to the suction nozzle 10. As a result, a desired part is sucked by the first suction nozzle 10. Since the nozzle body 10 of the suction nozzle 10 is movable in the axial direction with respect to the nozzle holder 30 and is elastically held by the inner spring 36, it absorbs an impact in the axial direction when sucking parts. be able to. Thereafter, the controller 160 raises the first suction nozzle 10 so as to return from the lowered position to the home position. The same operation is repeated for the second and subsequent suction nozzles 10. As a result, the components can be sucked by all of the first to twelfth suction nozzles 10. Thereafter, the controller 160 controls the X-axis slider 112 and the Y-axis slider 116 to move the head unit 110 toward the upper side of the substrate 101. During the movement, the head holder 21 is retracted upward so that the components sucked by the suction nozzles 10 do not interfere with the structure on the component mounting apparatus 100 or the components already mounted on the substrate 101. At a desired position on the substrate 101, the controller 160 lowers the first suction nozzle 10 and then supplies atmospheric pressure to the suction nozzle 10. As a result, the component sucked by the first suction nozzle 10 is mounted at a desired position on the substrate 101. Components that have been sucked by the second and subsequent suction nozzles 10 are similarly mounted on the substrate 101.

  The suction nozzle 10 is provided so that the intake auxiliary portion 16b connects the upstream side and the downstream side of the pin 26 in the intake passage 12. As shown in FIG. 5, the intake passage 12 has a cross-sectional area (an area of a cut surface obtained by cutting the intake passage 12 in a direction orthogonal to the direction in which the passage extends) narrowed by a pin 26. However, the gas can bypass the pin 26 and pass through the intake auxiliary portion 16b. Therefore, a sufficient flow rate can be secured even in the portion of the intake passage 12 where the pin 26 crosses. As a result, a sufficiently large negative pressure can be applied to the intake passage 12. For example, a large-capacity type capacitor is relatively heavy and has a curved surface (spherical surface) in many cases. Therefore, a sufficient flow rate is required for adsorption to the adsorption nozzle 10. With the suction nozzle 10 of this embodiment, such a capacitor can be firmly sucked.

  According to the suction nozzle 10 described in detail above, a sufficient flow rate can be secured even in the portion of the intake passage 12 where the pin 26 crosses. As a result, a sufficiently large negative pressure can be applied to the intake passage 12.

  Further, both ends of the pin 26 are used when integrated with the nozzle holder 30, and a relatively large force may be applied. However, since the pin 26 penetrates through the cylindrical portion 22 of the sleeve 20, the strength is high and the possibility of breakage is small as compared with the case where the pin is joined to the outer surface of the wall.

  Further, when the nozzle body 14 slides along the extending direction of the intake passage 12 with respect to the cylindrical portion 22 of the sleeve 20, the nozzle body 14 is guided and slid by a pair of long holes 16 a through which the pins 26 are inserted. Because it moves, the sliding direction does not shake.

  Furthermore, since the intake auxiliary portion 16b is a long hole penetrating the wall of the shaft member 16 of the nozzle body 14, the intake auxiliary portion can be easily manufactured as compared with the case where the intake auxiliary portion is a groove provided in the shaft member 16. .

  Further, since the pair of intake auxiliary portions 16b are formed in a balanced manner with the pair of long holes 16a, the strength of the nozzle body 14 can be increased compared to the case where these are formed so as to be offset. it can.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  For example, in the embodiment described above, the intake auxiliary portion 16b is a long hole that penetrates the wall of the shaft member 16 of the nozzle body 14, but may be a long groove that does not penetrate the wall of the shaft member 16.

  In the above-described embodiment, the intake auxiliary portion 16b is a long hole penetrating the wall of the shaft member 16. However, the inner wall is inclined along the gas flow so that the gas flows more smoothly through the long hole. Also good.

  In the embodiment described above, a pair of intake auxiliary portions 16b are provided, but only one or three or more may be provided. Further, the pair of intake assist portions 16b are provided at positions where the pair of long holes 16a are rotated by 90 degrees with the center line of the intake passage 12 as an axis. However, the present invention is not limited to this. The part 16b may be provided.

  In the above-described embodiment, both ends of the pin 26 protrude outward, but only one end of the pin 26 may protrude outward. In this case, you may make it attach to the nozzle holder 30 using the one edge part which protruded outside.

  The present invention can be used in a component mounting apparatus that mounts electronic components on a substrate.

DESCRIPTION OF SYMBOLS 10 Adsorption nozzle, 12 Intake passage, 14 Nozzle main body, 16 Shaft member, 16a Long hole, 16b Intake auxiliary part, 18 Nozzle tip member, 20 Sleeve, 21 Head holding body, 22 Cylindrical part, 24 Disk part, 26 Pin, 30 Nozzle holder, 32 Nozzle shaft, 32a Notch, 32b Spring receiving part, 33 Pin, 34 Tube, 34a Long hole, 35 Ring, 36 Inner spring, 38 Movable member, 38a Flange, 40 Outer spring, 100 Component mounting device, 101 Substrate , 102 base, 104 substrate transfer device, 106 support plate, 108 conveyor belt, 110 head unit, 112 X axis slider, 114 guide rail, 116 Y axis slider, 118 guide rail, 120 head, 130 mark camera, 132 parts Camera, 134 Nozzle stocker, 134a Nozzle holding hole, 150 parts supply device, 152 feeder, 154 reel, 160 controller, 200 suction nozzle, 202 nozzle body, 204 sleeve, 206 oblong hole, 208 pin, 210 Intake passage.

Claims (5)

A component mounting device that includes a suction nozzle that sucks an electronic component at the tip by negative pressure, and mounts the electronic component on a substrate,
The suction nozzle includes an intake passage, a pin that crosses the intake passage, and an intake auxiliary portion that is provided on a wall surrounding the intake passage and connects the upstream side and the downstream side of the pin in the intake passage. Component mounting device. The pin penetrates the wall surrounding the intake passage and the end protrudes to the outside, and the protruding end is used when integrated with the nozzle holder.
The component mounting apparatus according to claim 1. The component mounting apparatus according to claim 1 or 2,
A nozzle body comprising the wall surrounding the intake passage;
A sleeve for slidably storing the nozzle body along a direction in which the intake passage extends;
A pair of elongated holes provided in the nozzle body along the direction in which the intake passage extends;
With
The pin is fixed to the sleeve, traverses the intake passage and penetrates the pair of elongated holes.
Component mounting device. The intake auxiliary portion is a hole provided in the nozzle body along a direction in which the intake passage extends separately from the pair of long holes.
The component mounting apparatus according to claim 3. A pair of the intake auxiliary portions are provided on the nozzle body,
When viewing a cross-section of the portion of the intake passage where the pin crosses in a direction perpendicular to the direction in which the intake passage extends, the pair of elongated holes is symmetric twice about the center line of the intake passage. The pair of intake auxiliary portions is provided at a position obtained by rotating the pair of elongated holes 90 degrees around the center line of the intake passage.
The component mounting apparatus according to claim 3 or 4.

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