JPH09107198A - Electronic component fitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To interpose an electronic component between and hold it with a mechanical chuck stably and to fit it to a printed board, even if it is an electronic component of a different type, by causing a holding means to close the claws of the chuck by a vacuum-suction from a holder part side and to clamp the electronic component. SOLUTION: In an electronic component fitting device, a mechanical chuck is fitted to a fitting head 1 provided with an ascending and descending shaft 8 freely ascendable and descendable and having a holder part at its lower end, and the mechanical chuck closes the chuck claws 19, 29 by a vacuum-suction from the side of the holder part and interposes an electronic component B between and holds it. And the vacuum suction can be performed by also using vacuum suction which is done by fitting a suction nozzle 9 to the holder part and sucks and holds the electronic component B, and for the same holder part a suction nozzle 9 and a mechanical chuck having different electronic component B holding constitutions can be exchanged. Accordingly, it becomes possible for the mechanical chuck to hold the electronic component B which can not be held stably by suction since the mechanical chuck clamps the electronic component B with the chuck claws 19, 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for holding an electronic component by a mounting head and mounting it on a printed circuit board. More specifically, a component supply unit that arranges and accommodates a plurality of electronic components, a mounting head that vacuum-suctions a predetermined electronic component accommodated in the component supply unit and transfers the electronic component onto a printed circuit board, The present invention relates to an electronic component mounting device in which electronic component holding means such as a suction nozzle, which is the tip of a mounting head, is replaceable.

[0002]

2. Description of the Related Art Conventionally, in Japanese Unexamined Patent Publication No. 6-237094, an electronic component such as a chip component is mounted below a mounting head that is movably supported in a horizontal plane by an XY drive mechanism. The printed circuit board to be mounted is positioned and fixed by the transport mechanism, and a removable suction nozzle is attached to the holder part of the mounting head by the nozzle replacement part, and the mounting head that suction-holds the chip component from the component supply part with the attached suction nozzle. Is moved to the image capturing position opposite to the TV camera, the image of the chip component is captured by the TV camera, and the deviation with respect to the suction nozzle is recognized by the control unit, and the recognition result is used to chip the mounting head on the printed circuit board. An electronic component mounting machine that can realize highly accurate component mounting by correcting the component mounting point is shown.

[0003]

By the way, with the miniaturization of products that use circuits assembled by mounting electronic components such as chip components on a printed circuit board and the high density of such printed circuit boards, conventionally, lead wires have been conventionally used. In the electronic component of the type that is inserted into a hole provided in a printed circuit board and assembled, the electronic component that has not been surface-mounted has been changed for surface mounting. Many of these electronic components are electronic components called connectors and odd-shaped components, and many electronic components that cannot be adsorbed by a general-purpose adsorption nozzle are included. In order to hold such electronic parts, the suction nozzle has a special shape,
A suction nozzle dedicated to each electronic component is prepared, or a surface on which a general-purpose suction nozzle can suction is newly added to a part of the electronic component at the stage of manufacturing the electronic component. However, there are electronic components that cannot be sucked even if the suction nozzle shape is specialized. On the other hand, the suction surface added at the stage of manufacturing electronic components becomes unnecessary when the electronic components are mounted on the printed circuit board and must be removed. In addition to increasing the cost of electronic components, new work is required in the process of assembling the printed circuit board, further increasing the cost. In addition, there are electronic components to which such a suction surface cannot be added.

In view of the above points, the present invention can mount an electronic component which cannot be sucked by a general-purpose suction nozzle on a printed circuit board by holding it by a mechanical mechanical chuck without using the suction nozzle. The mechanical chuck can be attached to the holder part by the nozzle replacement part in the same manner as the removable suction nozzle on the holder part of the mounting head, and a general-purpose suction nozzle and a mechanical mechanical chuck are provided in any combination,
An object of the present invention is to provide an electronic component mounting apparatus in which an electronic component holding means, which is a tip end portion of a mounting head, can be replaced and operated including a mechanical mechanical chuck.

[0005]

In order to achieve the above object, an electronic component mounting apparatus according to the present invention comprises a mounting head provided with an elevating shaft having a holder portion at its lower end so as to be able to move up and down, and component supply for electronic components. Section and a nozzle exchanging section for accommodating a retaining means for electronic parts, the retaining section accommodating in the nozzle exchanging section is attached to the holder section of the mounting head, and the elevating shaft of the mounting head is elevated and held. An electronic component mounting apparatus that picks up an electronic component from the component supply unit by means to move and mount it on a printed circuit board that is positioned, wherein the holding unit closes a chuck claw by a force of vacuum suction from the holder unit side. The electronic parts are clamped and held by the electronic parts.

[0006] Further, a mounting head provided with a lifting shaft having a holder portion at the lower end so as to be movable up and down, a component supply portion for electronic components, a suction nozzle for sucking and retaining electronic components, and sandwiching and retaining electronic components. A mechanical chuck, and a nozzle replacement unit that houses the suction nozzle and the mechanical chuck,
The suction nozzle or the mechanical chuck housed in the nozzle exchanging portion is attached to the holder portion of the mounting head, and the elevating shaft of the mounting head is moved up and down to move the suction nozzle or the mechanical chuck from the component supply unit to the electronic component. Is an electronic component mounting device for picking up and moving on a positioned printed circuit board and mounting the electronic component mounting device, wherein the suction nozzle mounted on the holder part sucks a vacuum from the holder part side to suck and hold the electronic part, The mechanical chuck attached to the holder portion is configured to close the chuck claws by the force of vacuum suction from the holder portion side to clamp and hold an electronic component, and further, the mechanical chuck is attached to the holder portion to the holder portion side. More vacuum suction is a vacuum suction in which the suction nozzle is attached to the holder part to suck and hold an electronic component. And it has a configuration to use.

[0007]

In the electronic component mounting apparatus of the present invention, the mechanical chuck is attached to the mounting head which is provided with the elevating shaft having the holder portion at the lower end so as to be able to move up and down, and the mechanical chuck is subjected to vacuum suction from the holder portion side. Since the chuck claw is closed to hold and hold the electronic component, the vacuum suction can also be used as the vacuum suction for attaching and holding the electronic component by attaching the suction nozzle to the holder portion. It is possible to replace the chuck having a different structure for holding electronic components with the same holder portion. Further, since the mechanical chuck holds and holds the electronic parts by the chuck claws, it becomes possible to hold the electronic parts which cannot be stably held by suction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an electronic component mounting apparatus according to the present invention will be described below with reference to the drawings.

1 to 8, reference numeral 1 denotes a mounting head, through which a guide shaft 3, a ball screw shaft 4 and a ball spline shaft 5 which are parallel to each other pass through a main body 2 of the mounting head 1. The guide shaft 3 functions as a cylindrical shaft,
The ball spline shaft is fixed so that it does not rotate in anticipation of steadying of the mounting head 1 in the direction around the axis.
In addition, hollow shafts are used for each shaft in anticipation of weight reduction. These guide shaft 3, ball screw shaft 4, and ball spline shaft 5 are arranged and supported in the X direction,
A slide bearing 6 slidably fitted to a guide shaft 3 is fixed to a main body 2 of the mounting head 1, and a nut member 7 screwed to the ball screw shaft 4 is fixed. The guide shaft 3 supports the mounting head 1 slidably in the X direction, and the ball screw shaft 4 drives the mounting head 1 in the X direction by its rotation. The ball spline shaft 5 is for vertically moving the elevating shaft 8 having the suction nozzle 9 in the lower part.

As is apparent from the plan view of the overall structure of the electronic component mounting apparatus shown in FIG. 7, the mounting head 1 includes the Y-axis drive system 11 and the Y-axis drive system provided on the left and right sides of the base 15. Y direction slider 12 driven in Y direction by 11
X-comprising the X-axis drive system 13 provided in A and 12B
The Y drive system 14 is driven in the XY direction.

The Y-axis drive system 11 has a pair of Y-direction ball screw shafts 20A and 20B horizontally supported on the base 15 and axially supported in the Y-direction, and one end portions of the ball screw shafts 20A and 20B. Toothed pulleys 21A and 21B fixed to each other
And a Y-axis drive motor 23 fixed to the base 15 via the support member 22, and an output rotary shaft 129 of the motor 23.
And one end of the ball screw shaft 20A are connected by a shaft joint 24, the rotational force of the motor 23 is transmitted to the ball screw shaft 20A through the shaft joint 22, and the toothed pulley 21
A toothed belt 25 that transmits to the ball screw shaft 20B via A and 21B, and Y direction sliders 12A and 12B screwed to the ball screw shafts 20A and 20B, respectively, are provided. Has a function of moving the Y-direction sliders 12A and 12B by the same amount by rotating the sliders by the same angle.

The X-axis drive system 13 moves the mounting head 1 to the X-axis.
The guide shaft 3 slidably supporting the mounting head 1, the ball screw shaft 4 driving the mounting head 1 in the X direction, the elevating shaft 8 of the mounting head 1 and the ball spline for elevating the suction nozzle 9. Align the shaft 5 with the Y-direction slider 12
It has a structure installed between A and 12B, and the axes 3, 4, and 5 are arranged in the X direction orthogonal to the Y direction in the horizontal plane. The guide shaft 3 is fixed to the Y-direction sliders 12A and 12B, and the ball screw shaft 4 and the ball spline shaft 5 are rotatably supported by the Y-direction sliders 12A and 12B.
X through the shaft couplings 33 and 34 fixed to one end, respectively.
It receives the rotational force of the shaft drive motor 30 and the elevation drive motor 31. Each motor 30, 31 is Y
It is mounted on the direction slider 12A.

A large number of component supply parts 40 for supplying electronic parts such as chip parts are arranged on a pedestal 41 provided on the base 15 (in FIG. 7, six component supply parts 40 are mounted. Shows the state of arrangement). Further, a transport unit 50 that transports and positions and holds the printed circuit board 45 is disposed below the mounting head 1 to transport the printed circuit board 45 in the X direction.

3 and 4 show the mounting head 1, and FIG.
FIG. 4 is a plan view of the mounting head 1, and FIG.
It is a side view of the mounting head 1 which shows 4 and 5 in a cross section.
The spline nut 60 fitted to the ball spline shaft 5 is a bearing 61 fixed to the main body 2 of the mounting head 1.
Is rotatably held by the spline nut 6
An elevating cam 62 and a supply unit drive cam 63 are fixed to the position 0. A right end portion of a lever 64 as a cam follower that follows the lifting cam 62 is pivotally supported by the main body 2 at a swing fulcrum P, and the roller 6 pivotally attached to an intermediate portion of the lever 64.
5 contacts the lift cam 62. The roller 66 pivotally attached to the left end of the lever 64 is the lifting shaft 8
Is engaged with the engaging recess 69 of the flanged component 68 integrated with the main body 2, and a tension spring 67 is disposed between the left end of the lever 64 and the main body 2 to press the roller 65 against the cam 62. It is biasing in the direction.

Further, push-down levers 90A and 90B for giving a driving force to the component supply unit 40 are symmetrically pivoted at the main body 2 at pivot points Q and R, and one push-down lever 90A has a lever 89. And a roller 91 is pivotally attached to the end of the lever 89. The roller 91 is pulled by a tension spring (not shown) provided between the roller 91 and the main body 2 and is in contact with the supply portion drive cam 63.

Gears 92A and 92B are fixed to the side of the pivot points Q and R of the push-down levers 90A and 90B, respectively. The gears 92A and 92B are integrated with the levers 90A and 90B and rotate at the pivot points Q and R, respectively. And a gear 93
A and 93B are rotatably supported by shafts S and T fixed to the main body 2 in a state where they mesh with each other.
A is gear 93A, and gear 92B is geared with gear 93B. Further, rollers 94A and 94B are pivotally attached to the other ends of the push-down levers 90A and 90B. Therefore, when one of the push-down levers 90A is pushed downward by the supply unit drive cam 63, the roller 9
4A is attached to the lower end, and the other push-down lever 90B is also attached to the gears 92A, 93A, 93B, 9
It is operated via 2B so that the end to which the roller 94B is attached is also lowered. Rollers 94A, 94
B activates (pushes down) a lever that receives a driving force on the component supply unit 40 side to pick up an electronic component at the component supply position of the component supply unit 40 by a suction nozzle 9 or a mechanical mechanical chuck 10.
Then, it is sent out in a state where it can be adsorbed or held. Note that the component supply unit 40 can be installed on both sides of the transport unit 50, and the rollers 94A and 94B take charge of their respective sides (in FIG. 7, different types of the component supply unit 130 are installed on the opposite side of the component supply unit 40). Show case).

When the lower end of the main body 2 is provided with a pair of left and right mounting seats 51 and the mounting head 1 side is provided with a background light emitting means, a mounting tool 54 is fixed with bolts 53 via a spacer 52. , A large-diameter illumination board 55 on the fixture 54
The large-diameter diffusion plate 56 is fixed with bolts. Light-emitting diodes are arranged in a plane on the lower surface of the large-diameter illumination board 55, and the brightness of the light-emitting diodes can be controlled. The large-diameter diffusion plate 56 is the large-diameter illumination board 55.
It is formed of a semitransparent resin or the like with the same area as that of the light emitting diode and is opposed to the illumination substrate 55 with a spacer 57 interposed therebetween at a predetermined interval and diffuses the light of the light emitting diode on the illumination substrate 55 substantially uniformly. It has a function. A cylindrical support 58 is fixed to the center of the large-diameter diffusion plate 56, and an annular small-diameter illumination board 59 is attached to the tip of the support 58. Light emitting diodes are arranged in a plane on the lower surface of the small-diameter illumination substrate 59, and the brightness of the light emitting diodes can be controlled. The large-diameter illuminating board 55 on which the light emitting diodes are arranged, the large-diameter diffuser plate 56, and the small-diameter illuminating board 59 on which the light emitting diodes are arranged constitute a kind of background illuminating illuminating means.
A central hole for avoiding the elevating shaft 8 is formed in the central portions of the large-diameter illumination board 55, the large-diameter diffusion plate 56, and the small-diameter illumination board 59.

1, 2 and 8 are sectional views showing the lower end of the elevating shaft 8 which constitutes the holder of the mounting head 1. 1 and 2 show a case where a mechanical mechanical chuck 10 for an electronic component is attached, FIG. 1 is a sectional view in a direction in which the internal structure is easy to explain, and FIG. 2 shows a state when viewed from the side with respect to FIG. Show. FIG. 8 shows a case where a general-purpose suction nozzle 9 which has been conventionally known is attached. FIG. 4 shows a case where a general-purpose suction nozzle 9 as shown in FIG. 8 is attached to the lower end of the elevating shaft 8 which constitutes the holder of the mounting head 1. As shown in FIGS. 1, 2 and 8, the lower end of the elevating shaft 8 is provided with an outer cylindrical body 80 in which a hole 81 is fitted and fixed to the outer diameter of the lower end of the elevating shaft 8, and The hole 81 of the cylindrical body 80 is provided in the suction nozzle 9
The outer diameters of the fitting portions 131 and 101 of the mechanical chuck 10 are detachably received and fitted. On the other hand, the fitting parts 131, 10
Tapered portions 132 and 102 are provided so as to extend along the circumference of the distal end portion of No. 1 so that they can be easily fitted into the hole portion 81 within a predetermined positional relationship. After the fitting portions 131 and 101 are fitted into the hole portion 81, the fitting portions 131 and 101 maintain a predetermined positional accuracy with respect to the hole portion 81. Further, recessed groove portions 133 and 103 are provided so as to extend along the circumference of a predetermined portion of the fitting portions 131 and 101, and the hole portion 8
When the clamp piece 84 is fitted to the predetermined position and enters a predetermined position, the hemispherical tip of the clamp piece 84 engages with the concave groove portions 133 and 103 to prevent the clamp piece 84 from falling off. That is, a portion where the outer diameter of the outer tubular body 80 is larger than the other is prepared at a predetermined height position from the lower end of the outer tubular body 80, and a concave groove 82 is provided across the outer periphery.
2 forms the wall surfaces 127 and 128 at a portion where the outer diameter of the outer cylindrical body 80 is larger than the other, and the clamp hole 83 is provided from the bottom surface of the groove 82 toward the axial center of the outer cylindrical body 80. , The clamp hole 83 does not protrude from the distance between the wall surfaces 127 and 128, or if it protrudes, the wall surface 127,
The portion 128 is also formed by scraping, and has a proper clearance with respect to the outer diameter of the clamp piece 84 so that the piece 84 can be slidably fitted therein. The clamp hole 83 is a hole of the outer cylinder body 80. The diameter of the hole is tapered in a portion close to the portion 81,
This is to prevent the inserted clamp pieces 84 from falling off to the hole 81 side.

The clamp piece 84 has an appropriate clearance with respect to the clamp hole 83 and an outer diameter such that it can slide, and one end is formed in a hemispherical shape and the other end is formed in a planar shape. The hemispherical tip of the clamp piece 84 is fitted into the clamp hole 83 toward the hole portion 81 of the outer cylindrical body 80. Then, the O-ring 85 is spread over the entire circumference of the groove 82, and the wall surfaces 127, 128 are formed.
When the O-ring 85 has a proper tension in the fitted state, the flat end of the clamp piece 84 is pushed to push the clamp piece 84 toward the hole 81. The hemispherical tip of the piece 84 projects into the hole portion 81, but even if there is nothing in the hole portion 81, the hole diameter of the clamp hole 83 is tapered so that it falls off to the hole portion 81 side. There is no. The O-ring 8
5 also functions by using a simple ring-shaped rubber or a spring formed in a ring shape. Further, instead of tapering the hole diameter of the clamp hole 83, a stopper pin or the like is driven to clamp the clamp piece 84. It can also be prevented from falling off.

As shown in FIGS. 1, 2, and 8, the outer cylindrical body 80
A mounting hole is provided through the center of the hole portion 81 in the radial direction orthogonal to the hole portion 81 and a pin 86 is fitted therein. The pin 86 fits the hole portion 81 of the outer cylindrical body 80 to the outer diameter of the lifting shaft 8. If the lower end surface of the elevating shaft 8 is provided in a position where the lower end surface of the elevating shaft 8 comes into contact with each other when it is fitted in, the positioning becomes easy when assembling. Also in FIG.
When the fitting portion 131 of the general-purpose suction nozzle 9 is fitted into the hole 81, the upper end surface abuts on the fitting portion 131, so that the upper and lower positions at the time of fitting can be easily aligned. Here, referring to FIGS. 1 and 2, the main function of the pin 86 fitted in the hole 81 of the outer cylindrical body 80 will be described. The fitting is performed on the upper end surface of the fitting portion 101 of the mechanical mechanical chuck 10. The V groove 104 is provided linearly through the center of the portion 101, and when the fitting portion 101 of the mechanical chuck 10 is fitted into the hole portion 81, the V groove 104 abuts on the pin 86. As shown in FIG. 2, the two surfaces of the V-shaped groove 104 come into contact with each other, and the mechanical chuck 10 is also positioned in the rotational direction about the center line C. Position of the mechanical chuck 10 in the rotation direction, and the hemispherical tip of the clamp piece 84 engages with the concave groove portion 103 to push up the fitting portion 101, so that the two surfaces of the V groove 104 are pressed against the pin 86. Positioned and held so that it does not fall off That.

At the center of the lifting shaft 8, there is provided a through hole 87 that penetrates vertically, and the outer cylinder 80 is provided at the lower end of the lifting shaft 8.
The hole 81 and the outer diameter of the elevating shaft 8 and the outer diameter of the fitting portion 101 are fitted properly, and the through hole 87 is formed in the suction nozzle 9.
And airtightly connected to the mechanical chuck 10. Therefore, when the lower opening of the outer tubular body 80 and the opening by the clamp hole 83 are fitted with the fitting portions 131, 101 and the clamp piece 84, respectively,
Only the tip of the suction nozzle 9 is in an open state or in an airtight state in which the mechanical chuck 10 is connected to an operation mechanism described later.
Further, the upper end of the through hole 87 penetrating to the upper end of the elevating shaft 8 is made airtight except that it can be connected to the outside by a joint 88, that is, is connected to an external pneumatic circuit (not shown) via the joint 88. Vacuum suction or pneumatic supply can be performed.

As shown in FIGS. 5, 6 and 7, the mounting head 1
A nozzle exchanging section 70 for exchanging the suction nozzle 9 or the mechanical chuck 10 attached to is disposed so as to face the mounting head 1 at the nozzle exchanging position. The nozzle exchanging unit 70 includes an elevating block 73, slide shafts 75A and 75B that are attached to the elevating block 73 in parallel with each other in the ascending and descending directions, and a pedestal 140 provided on the base 15 includes a conveying unit 50. The slide shaft 7, which is a support member of the
Slide bearing 76 that slidably supports 5A and 75B
A and 76B, also attached to the pedestal 140,
An elevating air cylinder 77 that drives the elevating block 73 up and down, annular support members 71a to 71f fixed to the elevating block 73 for holding the suction nozzle 9 or the mechanical chuck 10, and the annular support member 71a. Clamping members 72A and 72B slidably arranged on the elevating block for clamping the suction nozzle 9 or the mechanical chuck 10 mounted on 71 to 71f. The clamp members 72A and 72B are interlocked with each other by a drive lever 74 pivotally attached to the elevating block 73 at a fulcrum P, and the clamp member 72A reciprocates with an opening / closing air cylinder 78 attached to the elevating block side. Configured to move. And each clamp member 72
When A and 72B are in the state shown by the chain double-dashed line in FIG. 5, they are in the closed state, and when they are in the state shown by the solid line in FIG. 5, they are in the open state.

These clamp members 72A and 72B are in the closed state shown by the chain double-dashed line in FIG.
Mounting head 1 driven and positioned in the X-Y direction at 4
With respect to the suction nozzle 9 or the mechanical chuck 10 attached to the holder portion of the nozzle exchanging unit 7 by raising and lowering the raising and lowering air cylinder 77, the raising and lowering block 73 is raised.
0 rises and the background disc 13 shown in FIGS.
The upper surface side of 4, 105 is clamped, and the nozzle replacement portion 7
When 0 is lowered, the suction nozzle 9 or the mechanical chuck 10 can be removed from the holder portion of the mounting head 1. Further, in the open state shown by the solid line in FIG. 5, the suction nozzle 9 or the mechanical chuck 10 mounted on the specific annular support members 71a to 71f is lifted from the holder exchanging portion 70 with respect to the holder portion of the mounting head 1. By doing so, the fitting portions 131, 10 of the specific suction nozzle 9 or the mechanical chuck 10 are
1 can be fitted and the suction nozzle 9 or the mechanical chuck 10 can be attached.

The nozzle exchanging portion 70 has 6
The individual suction nozzles 9 or the mechanical chucks 10 are housed, but the suction nozzles 9 of FIG.
1a to 71c, and the mechanical chuck 10 of FIG. 1 is accommodated in only three places of the annular supporting members 71d to 71f. One reason is the suction nozzle 9
The reason is that it is not necessary to store the fitting portion 131 in the nozzle exchanging portion 70 while keeping the rotational direction with respect to the axis center constant. On the other hand, the mechanical chuck 10 is always stored in a fixed direction so that the two surfaces of the V groove 104 provided on the upper end surface of the fitting portion 101 are brought into contact with the pins 86 and positioned in the rotational direction. It is necessary to hold the position. Another reason is that sensors 79A and 79B for detecting whether the suction nozzle 9 or the mechanical chuck 10 is housed are provided, but the suction nozzle 9 and the mechanical chuck 10 have different shapes in a considerable part.
As a result, the sensors 79A and 79B detect different points, that is, the sensors 79A are arranged respectively for the annular members 71a to 71c for accommodating the suction nozzle 9 and the annular member for accommodating the mechanical chuck 10. The sensor 79B is arranged for each of the members 71d to 71f.

The suction nozzle 9 shown in FIG.
, The background disk 134 and the nozzle pipe 135 form an integral structure, and each of them forms a rotating body having an outer diameter of a circle, shares a rotation center line D, and has the rotation center line D as a center. A hole 136 is formed on the fitting portion 131 side, and a hole 137 having a smaller diameter than the hole 136 is formed on the nozzle pipe 135 side, and both holes are made to be a vacuum suction hole or an air supply hole,
A nozzle cap 138 having a through hole is fitted to the nozzle pipe 135 to form the nozzle tip, and the holes 136 and 137 are formed.
And the through hole of the nozzle cap 138 communicate with each other. The background plate 139 is provided on the surface of the background disk 134 on the nozzle pipe 135 side.
In order to illuminate the background plate 139 from the background plate 139 side in accordance with the method of recognizing the image of the sucked electronic component E, the background plate 139 has a background as a small diffuser plate when the mounting head 1 side uses a background light emitting means. It is formed of a semi-transparent resin or the like together with the circular plate 134, or is a reflection plate such as a glossy metallic surface that diffusely reflects light, and is configured to obtain reflected light by illuminating light from the outside in the lateral direction, or an electronic component that adsorbs the background without reflection. In the case of illuminating E and recognizing an image, it is configured as a light absorbing plate such as a black flocked sheet. Nozzle cap 138
Can select the applicable range by attaching the one with different outer diameter, hole diameter and material corresponding to the electronic component E to be adsorbed.
In addition, it is possible to replace it when it is damaged due to wear or the like.

The mechanical mechanical chuck 10 for electronic parts shown in FIGS. 1 and 2 includes a fitting portion 101, a disk portion 105 having the same outer dimensions as the background disk 134 of the suction nozzle 9, and a chuck mechanism 110. Form an integral structure. That is, as shown in FIG. 1, the chuck mechanism 110 has a cylindrical fitting portion 101 and a disc portion 10 with a center line C as a common center reference.
5 and below. FIG. 1 shows a portion excluding the pin 86, the fixing bolt 106, the left and right chuck claws 111L and 111R, and the spring 112.
It is shown by the AA cross section of the cutting line connecting c and d. Guide shaft 10
Reference numeral 8 denotes a cylindrical portion 121 at the upper portion and a cylindrical portion 122 at the lower portion, which is formed by processing two parallel planes symmetrical to the center line C. The cylindrical portion is a hole provided from below the fitting portion 101 with the center line C as the center. 98, and the fixing bolt 106 from the bolt head counterbore hole 100 and the bolt hole 99 provided around the center line C from above the fitting portion 101.
The tightening guide shaft 108 is fixed to the fitting portion 101 by being screwed into the screw hole 123 formed in the center of the column 08. It should be noted that the pilot hole 124 of the screw hole 123 is provided with an extra length downward, a through hole 95 is provided in the center of the fixing bolt 106, and the lower end of the pilot hole 123 drilled in the center of the cylinder of the guide shaft 108 is open. Although not formed, a function of exerting vacuum suction or air pressure supply to the space by connecting communication holes 96 and 97 from the side surface of the cylinder to connect the prepared hole 123 and a space provided inside a disk portion 105 described later. To enable.

The sliding bush 32 has a ring shape, and has several outer diameter portions that are concentric with the inner diameter hole portion 36 and have different diameters, and these outer diameter portions are all described below from the slider 114 and the bellows. 115, each of which has a different outer diameter and which fits with each other, a portion of a larger diameter that constitutes the collar 35 that presses the upper side of the bellows 115, and a portion of which the diameter is smaller than the portion of the collar 35 on the upper side. . Then the inner diameter hole 36
Is slidable by fitting in the cylindrical portion 98 of the guide shaft 108. Therefore, the sliding bush 32 can move from the position where the lower end is in contact with the portion 122 of the guide shaft 108 to the upper end within the range allowed by the space. is there. The outermost part of the portion 122 forms a part of a cylinder centered on the center line C, and the slider 114 of the sliding bush 32 is larger than the outer diameter of the cylinder.
The outer diameter portion 37 that fits with is slightly larger. The slider 114 is machined from a cylinder and 42 is a large outer diameter portion and 43 is a small outer diameter portion.
From the side, an inner diameter hole portion 44 that fits with the corresponding outer diameter portion 37 of the sliding bush 32 is provided. The inner diameter hole portion 44 is larger than the outer diameter of the cylinder which is a part of the portion 122 of the guide shaft 108. The diameters are slightly larger and do not come into contact with each other, so that the outer diameter portions 42, 43 and the inner diameter portion 44 are all concentric with each other about the center line C, 47 and 48 are directions orthogonal to the paper surface of FIG. It is a flat surface.

In FIG. 2, a U-shaped groove 46 is provided on the slider 114 in a direction orthogonal to the plane of the drawing with the center line C as the center, and between the grooves 46 is formed a prism shape below the guide shaft 108. Portion 1 will be where the portion 122 will be located
22. Chuck claws 111L and 111R are installed on both sides of the pin 22, respectively. The chuck claws 111L and 111R are provided with fulcrum holes 17 and 27 by fulcrum pins 107L and 107R, respectively.
The pin holes 126L and 126R pivotally supported by 6R penetrate through both side walls of a slit 125 formed in the portion 122 in a direction orthogonal to the plane of the drawing.
2 is overlapped with the back side of the pin hole 126R of FIG. 2, the chuck claws 111L and 111R and the fulcrum pins 107L and 107R are not sandwiched between the opposite side walls of the groove 46, so that the chuck claws 111L and 111R are not shown.
Is swingable around the fulcrum pins 107L and 107R as fulcrums, but the other directions are regulated by both side walls of the slit 125, and the fulcrum pins 107L and 107R are prevented from coming off by both side walls of the slit 125. It

In FIG. 1, left and right drive pins 109L, 1
09R engages with the engaging recessed grooves 16 and 26 at the tips of the chuck claws 111L and 111R above the fulcrum holes 17 and 27, and the respective arm portions are bent substantially at right angles. Further, the drive pins 109L and 109R have holes 49 penetrating the slider 114 with the groove 46 therebetween as shown in FIG.
2 is provided and, for example, the drive pin 109R is passed through the groove 46 to be inserted and held in the hole 49, and the portion passed over the groove 46 is engaged with the engaging groove 16 of the chuck claw 111L. Chuck pin 1 for the drive pin 109L of
There is a similar configuration that engages the engagement groove 26 of the 11R.
Further, another role of the drive pins 109L and 109R is to prevent the slide bush 32 from coming off when the inner diameter hole portion 44 of the slider 114 is fitted to the outer diameter portion 37 of the sliding bush 32. A semicircular groove 39 is provided at a portion of the portion 37 shown in FIG.
The semi-circular groove 39 is formed so as to match the outer circumference of the drive pin 109R, and the portion on the opposite side of the portion 37 in FIG. Chuck claws 111L and 111R are attached to fulcrum pins 107L and 107R on the prismatic portion 122 of the guide shaft 108.
Pivot with, cover with slider 114, cylinder part 1
21 is fitted with the sliding bush 32, the outer diameter portion 37 of the sliding bush 32 is fitted with the inner diameter hole portion 44 of the slider 114, and then the hole 49 of the slider 114 and the portion 37 of the sliding bush 32 are fitted. When the drive pins 109L and 109R are inserted and held on the opposite sides through the provided semicircular groove 39, the slider 114 becomes integral with the sliding bush 32 and is guided by the cylindrical portion 121 of the guide shaft 108 to be movable. Is.

Holes 18 and 28 are provided in the middle of the arm portions of the chuck claws 111L and 111R, and pins are driven into the hooks 120L and 120R. The spring 112 having a U-shaped spring material is attached together with the chuck claws 111L and 111R to the above-mentioned portion 122, and the spring 112 is attached to the slit 12.
5 and hold it by fulcrum pins 107L and 107R, and then hook the ends of both sides of the spring 112 to the hooks 120L and 120R, respectively.
12 gives a force to open on both sides, so chuck jaws 111L,
111R mutually opens at the lower end to the left and right with the fulcrum pins 107L and 107R as fulcrums, while the upper engaging recessed grooves 16 and 26 descend downward so that the slider 114 and the sliding bush that engage via the drive pins 109L and 109R. FIG. 1 shows this state in which 32 is lowered downward, and the sliding bush 32 is lowered to a position in contact with the prism-shaped portion 122 of the guide shaft 108.

In FIG. 1, the disk portion 105 is shown in a cross section, and the inside of the disk portion 105 has four circular spaces continuous with a hole 98 provided at the center of the fitting portion 101, and all have a center line C. It is a circular space around the center, and the spaces 105A, 105B, 105C, and 105D are from the top. The space 105A has the smallest inner diameter, the space 105B has a much larger inner diameter, and the largest inner diameter is the space 105C. The inner diameter of the space 105D opened below 105 is larger than the space 105B and smaller than the space 105C. The space 105A has a communication hole 96 formed in the guide shaft 108,
The outlet side of 97 is widened to facilitate vacuum suction or pneumatic supply. The space 105B constitutes a sealed space in which a bellows 115 is brought into close contact with a step portion with the space 105C, and the bellows 115 is covered with a metal ring 116 from the lower side, which is the opposite side close to the step, over the entire circumference. Pushed, so that the ring 116 is further held from below while being pushed up by a leaf spring-like ring 117,
That is, the leaf spring-shaped ring 117 is a generally known member that, when pushed into the hole diameter portion, has an outer diameter portion that engages with the hole diameter portion to provide a retaining function. For this purpose, the inner diameter of the lower space 105D is made smaller than that of the space 105C to provide a slight step. The plate 118 is attached to the lower surface of the leaf spring ring 117, and the light absorbing sheet is further attached to the lower surface of the plate 118.
9 is assumed. The bellows 115, which has a circular plate shape, has a hole at the center thereof, and has an outer diameter portion 38 of the sliding bush 32.
The slider is fitted into the sliding bush 32 on the lower side in a state where the upper side around the hole of the bellows 115 is in close contact with the lower side of the collar 35 of the sliding bush 32. 11
4, while pressing the driving pins 109L, 10
Insert and hold 9R.

The lower ends of the arm portions of the chuck claws 111L and 111R have claws 19 and 29 for holding the electronic component B therebetween.
1 and 2, there is a horizontally long electronic component B as shown by phantom lines. The connector is horizontally long and has a terminal row that is placed on the printed circuit board surface at the bottom and connected to the circuit pattern. , And the electronic component B having such a shape as shown in FIGS.
R is the center line C as shown by virtual lines 111L 'and 111R'
The claws 19 and 29 that are symmetrically closed and sandwiched can be formed in a shape suitable for the sandwiched electronic component B.

As shown in FIGS. 1 and 2, a concave portion 113 is provided in a part of the outer circumference of the disk portion 105 of the mechanical chuck 10. The concave portion 113 connects the mechanical chuck 10 to the nozzle exchanging portion 70.
In order to maintain the direction when it is mounted on the mounting head 1, that is, as described above, the mechanical chuck 10 is held in the rotational direction by the pin 86 and the V groove 104 with respect to the lifting shaft 8 of the mounting head 1. However, even if the nozzle 86 is returned to the nozzle exchanging unit 70 and is placed thereon, if the positioning in the rotational direction is not performed, the pin 86 and the V are attached when the mounting head 1 is mounted again on the lifting shaft 8.
It is necessary to prevent the grooves 104 from not matching each other. The nozzle exchanging portion 70 has a convex portion (not shown) corresponding to the concave portion 113. The mechanical chuck 10 has the nozzle exchanging portion 7.
When it is placed at 0, the concave portion 113 is arranged in a state of being engaged with the convex portion and positioned in the rotational direction.

In the structure of the above embodiment, a plurality of types of suction nozzles 9 are distributed to the nozzle exchanging section 70 and housed in three places of the annular support members 71a to 71c, and a plurality of types of mechanical chucks 10 are distributed to form an annular shape. The support members 71d to 71f are stored in three places. The mounting head 1 is driven and moved in the XY direction by the XY drive system 14, and then,
The mounting head 1 moves to a predetermined position of the suction nozzle 9 or the mechanical chuck 10 housed in the nozzle exchanging part 70 and stops, and when the nozzle exchanging part 70 is raised, the holder part of the mounting head 1 is moved. The recessed groove portions of the fitting portions 131, 101 into which the fitting portion 131 or 101 of the suction nozzle 9 or the mechanical chuck 10 corresponding to a predetermined position is fitted into the outer cylindrical body 80 at the lower end portion of the elevating shaft 8 constituting the above. The clamp pieces 84 are engaged with the 133 and 103 to prevent the clamp pieces from falling off. When the nozzle replacement part 70 is lowered with the clamp members 72A and 72B opened, the mounting head 1 moves to a predetermined position and stops. The suction nozzle 9 or the mechanical chuck 10 selected in step 1 can be attached.

First, it is assumed that one of the suction nozzles 9 is selected and attached to the elevating shaft 8 of the mounting head 1. The mounting head 1 is driven by the XY drive system 14, and the predetermined component supply unit 4 is supplied.
Adsorption nozzle 9 at one of 0 or 130 component supply positions
When the ball spline shaft 5 is rotated by the elevation drive motor 31, the spline nut 60 rotates together with the rotation of the ball spline shaft 5, and the elevation cam 62 rotates. A lever 64 as a cam follower that follows the lifting cam 62 swings, whereby a roller 66 at the left end of the lever 64 engages with a flanged component 68 integrated with the lifting shaft 8 and is transmitted. As a result, the elevating shaft 8 moves up and down. Along with this raising / lowering operation of the raising / lowering shaft 8, vacuum suction is performed through the through hole 87 and the joint 88 of the raising / lowering shaft 8, and the nozzle tip of the suction nozzle 9 picks up and holds the electronic component E by picking it up from one of the component supply parts. . On the other hand, the printed circuit board 45 is positioned and held by the transport unit 50, and the mounting head 1 that has suction-held the electronic component E by the suction nozzle 9 moves to the mounting position on the printed circuit board, and is moved up and down in the same manner as during the pickup. The suction nozzle 9 is lowered to place the electronic component E on the printed circuit board and vacuum suction is closed. An adhesive is applied in advance to the mounting position on the printed circuit board to temporarily fix the electronic component E. The suction nozzle 9 that has become empty after mounting E on the printed circuit board rises and the mounting head 1
Enters the next cycle.

Next, when mounting the electronic component B, a predetermined mechanical chuck 10 is mounted on the mounting head 1, and when the suction nozzle 9 is already mounted on the mounting head 1, the mounting head 1 is mounted. Moves to a position where the suction nozzle 9 of the nozzle exchanging portion 70 should be housed. The nozzle exchanging portion 70 moves up with the clamp members 72A and 72B in an open state, and the suction nozzle 9 moves to the annular supporting members 71d to 7d.
The clamp members 72A, 7 when placed on any of 1f
2B is closed to lower the nozzle replacement portion 70, and the fitting portion 131 is moved against the engagement between the concave groove portion 133 of the fitting portion 131 of the suction nozzle 9 and the clamp piece 84.
0, the suction nozzle 9 is returned from the mounting head 1 to the nozzle exchanging section 70, and the mounting head 1 becomes empty. Subsequently, the mounting head 1 is moved to the X-Y drive system 14 to move the X-
The mechanical chuck 10 is driven in the Y direction and moved to a predetermined position of the mechanical chuck 10 of the nozzle exchanging section 70.
Attach. Then, the mounting head 1 is driven by the XY drive system 14, and the predetermined component supply unit 40 or 13
The center line C of the mechanical chuck 10 is located at one of the zero component supply positions.
The shape of the electronic component B whose center is shown by is different from that of the electronic component E. The claws 19 and 29 for sandwiching the electronic component B of the mechanical chuck 10 have a shape suitable for holding and the electronic component B has a shape. It is determined which part should be clamped to obtain stable holding. The electronic component B thus determined
The center of the mechanical chuck 10 is positioned at the component supply position of the electronic component B so that the portion of FIG. Then, when the ball spline shaft 5 is rotated by the elevating drive motor 31, the spline nut 60 rotates together with the rotation of the ball spline shaft 5, the elevating cam 62 rotates, and the cam follower that follows the elevating cam 62 rotates. As the lever 64 swings, the roller 66 at the left end of the lever 64 engages with the flanged component 68 integrated with the lifting shaft 8 and is transmitted. As a result, the lifting shaft 8 moves up and down. Take action.

When the elevating shaft 8 descends, the claws 19 and 29 descend on both sides of the electronic component B. Vacuum suction through the through hole 87 and the joint 88 of the elevating shaft 8 together with the elevating operation of the elevating shaft 8 is the same as in the suction nozzle 9, and when the elevating shaft 8 descends and vacuum suction is performed. The vacuum suction acts from the through hole 87 to the spaces 105A and 105B provided inside the disk part 105 through the through hole 95, the pilot hole 124 provided in the fixing bolt 106, and the connecting holes 96 and 97. Since 105B constitutes a space sealed by the bellows 115, the vacuum suction exerts a force to suck the bellows 115 toward the space 105B. A sliding bush 32 is in close contact with the slider 114 integrally with the center of the bellows 115. The sliding bush 32 is guided by the cylindrical portion 121 of the guide shaft 108, and the chuck claws 111L and 111R are connected to the spring 11.
The hooks 120L and 120R receive the force for opening to both sides of the two, and the chuck pins 111L and 111R receive the force in the opening direction with the fulcrum pins 107L and 107R as fulcrums.
The force for opening R is applied to the drive pin 10 via the engagement grooves 16 and 26.
It is transmitted from 9L and 109R to the slider 114 and the sliding bush 32, and always descends. When the vacuum suction exerts a force for sucking the bellows 115 toward the space 105B, the sliding bush 32 causes the sliding bush 32 to have a cylindrical portion 121 of the guide shaft 108.
Slider 11 that is guided and raised
4 also rises, so that the chuck claws 111L, 1L are driven from the drive pins 109L, 109R through the engagement grooves 16, 26.
11R closes the lower end pawls 19 and 29 while pressing the spring 112 from both sides with hooks 120L and 120R. When the pawls 19 and 29 are closed as shown by phantom lines 111L 'and 111R' in FIG. It is clamped from and held. When the elevating shaft 8 rises, the electronic component B has the claw 1
9, 29 pinch, hold and pick up.

Chuck claws 111L of the mechanical chuck 10,
The mounting head 1 which holds and holds the electronic component B by the claws 19 and 29 at the lower end of 111R moves to the mounting position on the printed circuit board, and the mechanical chuck 10 is lowered by the same lifting operation as at the time of pickup to print the electronic component B. Place on the substrate to stop vacuum suction, and when vacuum suction is stopped, the space 105B side is opened to the atmosphere by an air pressure circuit (not shown), or a certain time is switched to a positive pressure air circuit and then released to the atmosphere. As a result, the sliding bush 32 and the slider 114 lose the force of sucking the bellows 115 toward the space 105B via the drive pins 109L and 109R.
11R hooks 120L, 120R spring 112
The chuck claw 111, which receives the force to open to both sides and descends.
L and 111R the lower end claws 19 and 29 open to open and hold the electronic component B, and release the holding. The adhesive is applied in advance to the mounting position on the printed circuit board to temporarily fix the electronic component B. The mechanical chuck 10 that has become empty after mounting the component B on the printed circuit board rises and the mounting head 1 enters the next cycle.

[0039]

According to the electronic component mounting apparatus of the present invention, a so-called odd-shaped electronic component such as an electronic component that cannot be sucked by a general-purpose suction nozzle, or an electronic component that can be sucked and held stably cannot be mounted. Even electronic components can be clamped and held by a mechanical chuck and mounted on a printed circuit board. In addition, a general-purpose suction nozzle and a mechanical chuck can be arbitrarily selected and attached to the mounting head so that they can be attached and detached, and the function can be greatly expanded by adding a new mechanical chuck without impairing the function of the conventional mounting device. You can In the conventional configuration in which a general-purpose suction nozzle is attached to the mounting head, vacuum suction is applied to the suction nozzle to suck and hold electronic components, but the vacuum suction can be utilized as a driving means for a new mechanical chuck, The drive means is not complicated and has a simple structure, and the suction means can be replaced with a general-purpose suction nozzle. It is possible to provide an electronic component mounting apparatus that can reliably mount various electronic components on a printed circuit board even if they are made for surface mounting.

[0040]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mechanical chuck of an electronic component according to the present invention, which is attached to a lower end portion of a lifting shaft of a mounting head.

2 is a side view of FIG. 1 showing a state in which a mechanical chuck is attached to a lower end portion of a lifting shaft of a mounting head.

FIG. 3 is a plan view of the mounting head of the embodiment.

FIG. 4 is a side view of the mounting head of the embodiment, showing a case where a suction nozzle is attached.

FIG. 5 is a plan view showing a nozzle exchanging portion.

FIG. 6 is a side view showing a nozzle replacement section and a lifting air cylinder.

FIG. 7 is a plan view of the overall configuration of the electronic component mounting apparatus in the example.

FIG. 8 is a sectional view showing a state in which a suction nozzle is attached to a lower end portion of a lifting shaft of a mounting head.

[Explanation of symbols]

 1 Mounting Head 8 Lifting Shaft 32 Sliding Bushing 80 Outer Cylindrical Body 87 Through Hole 88 Joint 95 Through Hole 96 Communication Hole 97 Communication Hole 105 Disc 105B Space 107L Support Pin 107R Support Pin 108 Guide Shaft 109L Drive Pin 109R Drive Pin 111L Chuck Claw 111R Chuck Claw 112 Spring 114 Slider 115 Bellow 120L Hook 120R Hook B Electronic Parts

Claims (4)

[Claims] 1. A mounting head having a vertically movable shaft having a holder portion at a lower end thereof, and a component supply portion for electronic components,
A nozzle exchanging section for accommodating a holding means for electronic parts,
A printed circuit board in which holding means for accommodating in the nozzle exchanging part is attached to the holder part of the mounting head, and an elevating shaft of the mounting head is moved up and down to pick up electronic components from the component supply part by the holding means and positioned. An electronic component mounting device that moves upward and mounts the electronic component mounting device, wherein the holding means closes a chuck claw by a force of vacuum suction from the holder portion side to sandwich and hold an electronic component. 2. A mounting head provided with a lifting shaft having a holder portion at the lower end so as to be able to move up and down, and a component supply portion for electronic components,
An adsorption nozzle for adsorbing and holding an electronic component, a mechanical chuck for nipping and holding an electronic component, and a nozzle exchanging unit for accommodating the adsorption nozzle and the mechanical chuck, and the nozzle exchanging for the holder of the mounting head. The suction nozzle or the mechanical chuck to be housed in a unit, and the elevating shaft of the mounting head is moved up and down to pick up an electronic component from the component supply unit by the suction nozzle or the mechanical chuck and position it on a printed circuit board. An electronic component mounting device for moving and mounting, wherein the suction nozzle mounted on the holder part sucks vacuum from the holder part side to suck and hold an electronic component, and the mechanical chuck mounted on the holder part is The electric power is characterized in that the chuck claws are closed by the force of vacuum suction from the holder side to clamp and hold electronic components. Component mounting apparatus. 3. The vacuum suction from the holder section side by attaching the mechanical chuck to the holder section is also used as the vacuum suction to attach the suction nozzle to the holder section to suck and hold an electronic component. Electronic component mounting device. 4. The mechanical chuck comprises: a pair of chuck claws pivotally supported on a lower end of a guide shaft; and sliders which are guided by the guide shaft and move to engage the pair of chuck claws so that the lower ends thereof are brought into contact with and separated from each other. A bellows that is fixed to the slider at the center, and a disk portion that is in close contact with the entire outer circumference of the bellows and that forms a sealed space excluding the communication hole, and vacuum suctions the space through the communication hole. 3. The electronic component mounting apparatus according to claim 2, wherein the slider is moved to close the pair of chuck claws, and the pair of chuck claws holds and holds the electronic component.