JPH0731599Y2 - Mounting head of component mounting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a mounting head of a component mounting machine for mounting a chip component (electronic component without lead wire) on a printed circuit board.

(Prior Art) Conventionally, an index rotary type mounting head in which suction pins are provided on the index head at equal angular intervals is used when the index head comes to a specific position, as disclosed in JP-A-62-30399. The suction pin is configured to be rotated by a predetermined amount.

(Problems to be solved by the invention) On the other hand, a mounting head having a large number of suction pins arranged in one row is attached to the lower side of an XY table, and a large number of suction pins each holding a chip component are simultaneously placed on a printed circuit board. In the case of a configuration in which the chip components are moved and individually mounted on the printed circuit board, the rotation angle of the suction pin is set one by one like the index rotary type mounting head. It takes too much time to set the suction pin chip component attitude to the specified angle.

It is an object of the present invention to provide a mounting head of a component mounting machine that eliminates the above-mentioned inconvenience and can quickly set the rotation angles of a plurality of suction pins.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a plurality of lifting bodies having suction pins at the lower end so that they can be raised and lowered and rotated with respect to a head frame, and each lifting body is provided. A corresponding clutch is provided, and the driven shaft and the driving shaft of the clutch are pivotally supported on the head frame side, and each driven shaft and the corresponding lifting body are linked by a transmission mechanism, and each driving shaft is the same. One rotary drive shaft and each main shaft are wound so as to rotate at the same angle in the same direction at the same time, and are linked by a transmission mechanism. In the connected state, the main turning operation of rotating the lift body by a rotation angle individually determined and disconnecting the clutch, and in the connected state of the lift body, the correction rotation for correcting and turning the clutch by a small angle It is configured to execute a turning operation.

(Operation) In the mounting head of the component mounting machine of the present invention, one rotary drive source can be commonly used for rotary drive of a plurality of suction pins, and the connection time of the clutch provided corresponding to each suction pin is different for each suction pin. By individually defining each pin, the rotation angle required for each suction pin can be obtained. For example, if the rotation drive source is set to repeat the operation of rotating the suction pin 45 degrees and then temporarily stopping it, leave each clutch in the connected state except for those that do not require rotation, and rotate 45 degrees. For the required suction pin, disengage the clutch at the end of the first 45 degree turn, and for the suction pin that requires a 90 degree turn, disengage the clutch at the end of the second 45 degree turn, 135 degree For the suction pin that requires swiveling, the clutch is disengaged when the third 45 degree swivel is completed, and for the suction pin that requires 180 degree swiveling, the fourth
The clutch may be disengaged at the time when the turning of 5 degrees is completed (the same applies to the following 225 degrees, 270 degrees, etc.), and the turning angle for one turn may be an angle other than 45 degrees. Therefore, it is possible to quickly set the rotation angles of the plurality of suction pins with a simple configuration.

Embodiment An embodiment of the mounting head of the component mounting machine according to the present invention will be described below with reference to the drawings.

FIG. 2 shows the component mounting machine, and FIG. 3 shows the mounting head of the component mounting machine and its associated parts. In these drawings, 1 is a supply unit in which a large number of supply units for supplying chip components are arranged (in a direction perpendicular to the paper surface of FIG. 2), 2 is a take-in head, 3 is a mounting head 4, 4 is a transfer station, and 5 is a transfer station. Is a belt conveyor mechanism that conveys a printed circuit board. The take-in head 2 has a large number of suction pins 7, and selectively picks up chip components from the component supply position P of each supply unit in the supply unit 1 and transfers them to the transfer station 4. The transfer station 4 has a large number of chip component suction positions, and holds the chip components transferred by the take-in head 2 by suction. The mounting head 3 has the same number of suction pins 10 as the number of chip component suction positions of the transfer station 4, sucks a large number of chip components suction-held on the transfer station 4, and then, on the belt conveyor mechanism 5. The chip component is mounted at a predetermined position (previously coated with an adhesive) of the printed circuit board 8 which has been positioned and stopped.

The mounting head 3 is mounted below the XY table 11. That is, the Y-direction slider 12 is movably supported in the Y-direction by the Y-direction slide guide on the body frame side of the component mounting machine, and a female screw member integrated with the Y-direction slider 12 is pivotally supported on the body frame side. The Y-direction slider 12 is moved in the Y direction by being screwed onto the directional ball screw shaft 13. Also, the Y direction slider 12
X by the X direction slide guide 14 fixed to the lower side of the
The direction slider 15 is slidably supported in the X direction, and a female screw member integrated with the X direction slider 15 is screwed onto an X direction ball screw shaft 16 pivotally supported on the Y direction slider 12 side to form a ball screw shaft. The rotation of 16 causes the X-direction slider 15 to move in the X-direction. The mounting head 3 is attached to the lower side of the X-direction slider 15.

This mounting head 3 has the same suction pin array as the chip component suction position of the transfer station 4, and for example, as shown in FIG. Equipped at intervals.

FIG. 1 shows a suction pin elevating / rotating mechanism 20 provided corresponding to each suction pin 10 of the mounting head 3. In this figure,
A lifting block 32 having a suction pin 10 provided at the lower end in each cylindrical hole 31 of a fixed block 30 fixed to the mounting head frame 21.
Is provided so as to be slidable and rotatable in the vertical direction (Z direction). The upper and lower parts of the lifting body 32 are lifting rods 33. Further, a cylindrical groove cam 23 is fixed to a rotary shaft 22 which is axially supported in the mounting head frame 21 in the Y direction, while one is provided in a shaft body 24 which is axially supported in the mounting head frame 21 in the X direction. Individual cam followers 25 are fixed, and a roller 26 pivotally attached to one end of the cam followers 25 is engaged with a cam groove 27 of the cylindrical groove cam 23. Therefore, the rotation of the cylindrical groove cam 23 causes the other end of the cam follower 25 to swing. Where 1
The individual cam followers 25 are common to all suction pins, and the engaging plate 34 fixed to the upper end of the lifting rod 33 corresponding to each suction pin.
The end portion 35 of the cam follower 25 is branched so as to engage with.

On the other hand, each suction pin 10 has a suction hole opened at the tip thereof, and the suction hole is connected to a negative pressure source such as a vacuum pump via a vacuum suction passage on the lifting / lowering body and the fixed block and a valve 37. Further, selection air cylinders 38 are respectively arranged above the lifting rods 33 corresponding to the suction pins 10 and fixed to the mounting head frame 21. The valve 39 turns on and off the supply of compressed air to each selection air cylinder 38. The lifting body 32 having the suction pin 10 at the lower end is biased upward by a compression spring 40 provided around the lifting rod 33.

Further, a gear 41 is fixed around the lifting body 32, and the gear 41
Meshes with a gear 42 pivotally mounted on the frame 21. The gear 42 meshes with a gear 45 that is integral with a driven shaft 44 of the clutch 43. The driven shaft 44 has a conical concave surface for frictional connection at the lower end.
52, which is supported so as to be rotatable with respect to the frame 21 and slightly movable in the axial direction, and is pushed down when the clutch connecting air cylinder 46 is actuated, and has the conical convex surface 53 for friction connecting, which is the main movement of the clutch 43. It is connected to the shaft 47 to receive its rotational force. Also, the air cylinder 46
Is in an inoperative state, the compression spring 50 that biases the driven shaft 44 upward causes the concave surface 52 and the convex surface 53 of the clutch 43 to separate,
The gear 45 is pressed against the fixed plate 56 on the frame 21 side via the brake plate 51 so that the driven shaft 44 does not idle.

The clutch main shaft 47 is rotatably supported with respect to the frame 21, a suction pin rotation pulley 48 is fixed to the lower end of the clutch main shaft 47, and a guide pulley 49 is attached to a mounting bracket 55 fixed to the frame 21. It is pivotally attached.

FIG. 4 shows the pulley 48 for rotating the suction pin provided corresponding to each suction pin 10 (if there are 20 suction pins, the pulley will be a pulley.
20 also 48), the guide pulley 49, and guide pulleys 57, 58, 59 located at both ends of the mounting head frame 21.
3 shows the arrangement of a drive pulley 61 fixed to the rotary drive shaft of a motor 60 with a speed reducer, which is a drive source, and the tensioned state of a timing belt 62 wound between the pulleys. From this figure, it can be seen that the suction pin rotating pulleys 48 are driven to rotate in the same direction and at the same angle.

The valve 65 is for turning compressed air on and off to the clutch connecting air cylinder 46.

In the configuration of the above embodiment, for the suction pin 10 in which the corresponding valve 39 is turned on, the selection air cylinder 38 is actuated by the compressed air and can be lowered against the force of the compression spring 40. The suction pin 10 moves up and down following the swinging movement of 25, and the suction operation of the chip component can be performed. The suction operation of this chip component is performed by the XY table 11 by each suction pin of the mounting head 3.
10 is carried out at the time when the chip is moved to each chip component suction position of the transfer station 4. After the chip parts placed on the transfer station 4 are suction-held, the suction pin is required to rotate, the corresponding valve 65 is turned on and the clutch connecting air cylinder 46 is operated to connect the clutch 43. In this state, the suction pin 10 is rotated in advance so as to reach a predetermined rotation angle position via the gear. As the rotation operation of the suction pin 10 in this case, the chip component 70 sucked and held by the suction pin 10 as shown in FIG.
Degree, or in some cases 45 degrees, 180 degrees, 270 degrees, etc.), and a small angle Δθ to make the chip component 70 take the proper correct posture as shown in FIG. 5 (B). There is a correction turning operation for turning only. Here, for example, the motor 60 of the rotary drive source is set to repeatedly perform the operation of rotating the suction pin 10 by 45 degrees and temporarily stopping it, and the main rotation of each suction pin 10 does not require rotation. Except for the ones, keep the clutch 43 connected,
For the suction pin that requires a 45-degree turn, disengage the clutch 43 at the end of the first 45-degree turn, and for the suction pin that requires a 90-degree turn at the second 45-degree turn. The clutch is disengaged, and for the suction pin that requires a 135 degree turn, the clutch is disengaged when the third 45 degree turn is completed. For the suction pin that needs a 180 degree turn, the fourth 45 degree turn is completed. It can be efficiently realized by disengaging the clutch at the time point (the same applies to 225 degrees, 270 degrees, etc.). In addition, the corrective rotation of the suction pin 10 is performed by sequentially checking the holding component postures of the respective suction pins, and the corresponding clutch of one target suction pin 10 is checked.
This is performed by connecting only 43 and rotating the motor 60 by a necessary angle. The correction rotation is sequentially executed for each suction pin that requires it.

For the suction pin 10 whose corresponding valve 39 is off, the selection air cylinder 38 does not operate and the suction pin 10
Remains in the raised position, and the suction operation is not performed.

The mounting head 3 which holds the chip component at a predetermined rotation angle and is held by the suction pin 10 moves onto the printed circuit board 8 whose positioning is stopped by the XY table 11 and is individually selected to perform the lifting operation. The chip component is mounted at the chip component mounting position (adhesive coating position) on the printed circuit board by 10.

As described above, the raising / lowering operation of the suction pin 10 of the mounting head 3 is performed by using the cam mechanism, and the raising / lowering speed can be improved as compared with the case of directly raising / lowering the suction pin by the air cylinder.

Further, a clutch 43 is provided corresponding to each suction pin 10 and
A large number of clutch drive shafts 47 are rotated by one rotation drive source, and the clutch driven shaft 44 and the drive shaft that interlock with the suction pin 10
Each suction pin 10 can be individually set to a predetermined rotation angle by setting the connection time with 47 to an appropriate length, and since only one drive source is required, the mechanism is simple and downsizing can be achieved.

In the above embodiment, the mounting head 3 mounts the chip components on the transfer station 4 on the printed circuit board 8. However, in the present invention, the mounting head sucks and holds the chip components from the supply unit. Obviously, it is also applicable when mounted on a printed circuit board.

(Effects of the Invention) As described above, the mounting head of the component mounting machine of the present invention can share one rotary drive source for rotary drive of a plurality of suction pins, and is provided corresponding to each suction pin. By individually determining the connected state or the disengaged state of the clutch for each suction pin, the rotation angle required for each suction pin can be obtained. At that time, by performing a combination of a main swing operation that swings the suction pin largely and a correction swing operation that swings the component held by the suction pin by a minute angle so that the suction pin has the original correct posture, each suction pin The required rotation angle can be given quickly and accurately. Therefore,
It is possible to quickly set the rotation angles of a plurality of suction pins, and even if the number of suction pins is large, a simple mechanism is sufficient, which is also advantageous in terms of size reduction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of an embodiment of a mounting head of a component mounting machine according to the present invention, FIG. 2 is a side sectional view showing a structural example of the component mounting machine, and FIG. 3 is mounting. FIG. 4 is a plan view showing a head and a portion associated therewith, FIG. 4 is a plan view showing a pulley fixed to a clutch main shaft and a winding transmission mechanism for rotating the pulley, and FIG. It is explanatory drawing which shows a chip component rotation operation. DESCRIPTION OF SYMBOLS 1 ... Supply part, 2 ... Take-in head, 3 ... Mounting head, 4 ... Transfer station, 5 ... Belt conveyor mechanism, 7,10 ... Adsorption pin, 8 ... Printed circuit board, 11 ... XY table, 20 ... Adsorption Pin elevating / rotating mechanism, 21 ... Mounting head frame, 23 ... Cylindrical groove cam, 25 ... Cam follower, 32 ... Elevating body, 33 ... Elevating rod, 38 ... Air cylinder for selection, 41,42,45 ... Gear, 43
... clutch, 44 ... driven shaft, 46 ... clutch connecting air cylinder, 47 ... drive shaft, 48, 49, 57, 58, 59, 61 ... pulley, 6
0 ... Motor with reducer, 62 ... Timing belt, 70 ... Chip parts.

Claims (2)

[Scope of utility model registration request] 1. A plurality of elevating bodies having suction pins at the lower end thereof are provided to be movable up and down and rotatable with respect to a head frame, and a clutch is provided corresponding to each elevating body, and a driven shaft and a main driving shaft of the clutch are provided. A shaft is supported on the side of the head frame, and each driven shaft and the corresponding lifting body are interlocked by a transmission mechanism, so that each driving shaft rotates in the same direction at the same angle at the same angle. Each main shaft is linked by a winding transmission mechanism, and for each lifting body that requires rotation of the suction pin, the corresponding clutch is engaged and rotated by a rotation angle individually determined for each lifting body. A main turning operation for disengaging the clutch and a correction turning operation for correcting and turning the clutch by a small angle for each lifting body are executed. De. 2. The mounting head for a component mounting machine according to claim 1, wherein the lifting body is driven to move up and down by a cam mechanism.