KR100294913B1 - Multi-nozzle head machine for chip mounter - Google Patents

Abstract

Disclosed are a multiple nozzle head device of a component mounter. According to the present invention, a mount for lifting along a guide rail; A rotary head rotatably mounted relative to the mount; A plurality of spindles installed in the rotary head, and a nozzle for suction / mounting the component installed at an end of the spindle; A spring supported at both ends between the spindle and the mount to provide an elastic force for raising the spindle; A cam follower provided on an upper portion of each spindle; A cam for selectively lowering the spindle by contacting the cam follower; A cam drive motor mounted to the mount to drive the cam to rotate; A head rotation drive motor fixed relative to the mount to rotationally drive the rotary head; Provided is a multi-nozzle head device for a component mounter having a pulley and a belt for transmitting a driving force of the head rotation driving motor to the rotary head.

Description

Multi-nozzle head machine for chip mounter

The present invention relates to a multiple nozzle head device for a component mounter, and more particularly, to a head device that allows a plurality of nozzles provided in the component mounter to rotate and adsorb and mount a component.

In general, a component mounter is a device for attaching an electronic component such as a semiconductor chip to a predetermined position on a circuit board after absorbing an electronic component using a vacuum, and having a vacuum nozzle head for absorbing and mounting the component. The performance of the component mounter is determined by many factors, but in particular the operation of the nozzle head must be made quickly and accurately. To this end, it is necessary to improve the driving force of the nozzle head and at the same time reduce the weight of the nozzle head itself.

In the multi-nozzle head apparatus employing multiple nozzles, there is an advantage in that the component mounting efficiency can be improved by adsorbing and simultaneously mounting a plurality of components, but the weight of the multi-nozzle head becomes heavy, and thus There is a disadvantage that acceleration and deceleration are not performed quickly. That is, in order to elevate or rotate a plurality of nozzles provided in the multiple nozzle heads, a separate driving device is installed for each nozzle to increase its own weight. In addition to the problem of weight increase, the complexity of controlling a separate drive device is increased.

The present invention has been made to solve the above problems, it is an object of the present invention to provide a multi-nozzle head device of the component mounter that can increase the component mounting efficiency.

Another object of the present invention is to provide a multi-nozzle head device of a component mounter that minimizes its weight by using a simplified cam mechanism.

1 is a schematic configuration diagram of a multi-nozzle head apparatus of a component machine according to the present invention.

2 is an explanatory diagram showing an operating state of a multiple nozzle head device with respect to a component tray;

3 is a schematic perspective view of a cam;

4A and 4B are exploded views showing the cam diagram and thus the position of the spindle.

5 is a configuration diagram showing an operation mechanism of the movable mirror.

<Brief description of the major symbols in the drawings>

11. Mount 12. Linear Motion Guide

13. Guide rail 14. Camera

15. Bearing 16. Head Rotation Drive Motor

17. Rotary head 18. Bearing

19. Spindle 21. Cam

22.Roller 23.Tube

24. Bearing 27. Pulley

In order to achieve the above object, in accordance with the present invention, the mounting and lifting along the guide rail; A rotary head rotatably mounted relative to the mount; A plurality of spindles installed in the rotary head, and a nozzle for suction / mounting the component installed at an end of the spindle; A spring supported at both ends between the spindle and the mount to provide an elastic force for raising the spindle; A cam follower provided on an upper portion of each spindle; A cam for selectively lowering the spindle by contacting the cam follower; A cam drive motor mounted to the mount to drive the cam to rotate; A head rotation drive motor fixed relative to the mount to rotationally drive the rotary head; Provided is a multi-nozzle head device for a component mounter having a pulley and a belt for transmitting a driving force of the head rotation driving motor to the rotary head.

According to one feature of the invention, the cam is provided with a cam surface at the same height and a protrusion projecting at a different height with respect to the cam surface, and the cam follower is a roller contacting the cam surface and the protrusion.

According to another feature of the invention, the sliding cam is provided so that it can be elevated relative to the mount; A support part rotatably installed with respect to the mount and having a cam follower in contact with the sliding cam on one side; A movable mirror installed at one side of the support part; A spring connected between one side of the support and the mount; An imaging camera fixed relative to the mount; And a fixed mirror fixed to the mount at the bottom of the imaging camera.

Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in the accompanying drawings.

1 shows a schematic diagram of a multi-nozzle head device of a component mounter according to the present invention. This multi-nozzle head device is subjected to planar motion reciprocating between the part tray and the substrate by means of transfer devices, for example Cartesian robots, which are not shown.

Referring to the drawings, the multi-nozzle head device includes a mount 11 that moves up and down along the guide rail 13, a rotary head 17 rotatably installed with respect to the mount 11, and the rotary head 17. A plurality of spindles 19 installed, a nozzle 29, a cam follower 22 provided on the upper side of the angular spindles 19, a cam 21 installed to contact the cam follower 22, A cam drive motor 25 for rotationally driving the cam 21, a head rotation drive motor 16 fixed to the mount 11 to drive the rotary head 17 rotationally, and the head rotation drive. And a pulley 27 and a belt 28 for transmitting the driving force of the motor 16 to the rotary head 17. In the lower part of the mount 11, the component imaging camera 14 is provided, and the movable mirror 30 which reflects the image of the component C, and the fixed mirror 31 are provided.

The mount 11 is moved up and down by the guide rail 13 and the linear motion guide 12 slidably installed with respect to the guide rail 13. This lifting motion is made by a separate driving device (not shown), through which the overall lifting motion of the multi-nozzle head device can be made. The lifting motion through the guide rail 13 and the linear motion guide 12 takes place at a relatively long distance.

An imaging camera 14 is installed below the mount 11. When the component C is attracted to the end of the spindle 19, the imaging camera 14 picks up an image of the component C reflected through the movable mirror 30 and the fixed mirror 31. The movable mirror 30 and the fixed mirror 31 are also provided with respect to the mount 11, the detailed structure of which will be described later.

The rotary head 17 is installed to be rotatable with respect to the mount 11. In the embodiment shown in the figure, the rotary head 17 is installed to be rotatable through the bearing 18. The rotary head 17 is formed in a cylindrical shape, for example, in which a groove is formed in which the spindle 19 for component adsorption can be inserted. Grooves into which the component adsorption spindle 19 is inserted are formed at predetermined intervals on the circumference as shown in FIG. In the example shown in FIG. 2, it can be seen that four pairs of spindles 19 are arranged at an interval of 90 degrees along the circumference indicated by reference numeral 41. The component adsorption spindle 19 is installed in the groove of the rotary head 17 so as to be lifted and lowered.

The rotary head 17 may be rotated by the driving force of the head rotation driving motor 16. A pulley 27 is installed at the end of the drive shaft of the head rotation drive motor 16, and the pulley 27 is connected to the pulley installed on the outer circumferential surface of the rotary head 17 via a belt 28. The driving force obtained by the rotation of the head rotation drive motor 16 causes the rotary head 17 to rotate, whereby the rotational position of the spindle 19 inserted into the rotary head 17 can be changed.

A spring 20 is installed at the upper end of the spindle 19. One end of the spring 20 is supported against the upper end of the spindle 19, while the other end of the spring 20 is supported against the rotary head 17. Therefore, the elastic force of the spring 20 acts as a force for raising the spindle 19. On the other hand, the tube coupling 32 is installed on the upper portion of each spindle 19, so that the vacuum provided through the tube 23 can reach the nozzle 29 through the spindle 19. The tube 23 is connected via another tube coupling 38.

The cam drive motor 25 is disposed directly above the rotary head 17 and fixed to the mount 11. The rotating shaft of the cam drive motor 25 rotates the cam 21 through the connecting portion 33. The connecting portion 33 is rotatably provided with respect to the mount 11 via the bearing 24.

3 is a schematic perspective view showing the cam shown in FIG. 2 in an inverted state.

Referring to the drawings, the overall cylindrical shape, the lower end is formed with a cam surface 48 in contact with the cam follower 22. The cam face 48 is provided with a projection 47. When the projection 47 reaches the position where it contacts the cam follower 22, the spindle 19 is lowered.

Referring again to FIG. 2, the cam follower 22, which is in contact with the cam surface 48, is, for example, a roller 22, and the cam follower 22 is installed above the spindle 19. . When the projection 47 formed on the cam surface 48 comes in contact with the cam follower 22, the spindle 19 is subjected to downward pressing force against the upward elastic force of the spring 20, and thus lowers downward. Done. That is, each spindle 19 is selectively lowered according to the rotation of the cam 21, and the lowering of the spindle 19 is a relatively short stroke length corresponding to the height of the protrusion 47 of the cam 21. Is made of.

4A and 4B are schematic exploded views shown to show the cam diagram and the lowered state of the spindle.

Referring to the drawings, when the cam is formed in a cylindrical shape as a whole, the cam surface 48 at the same height and the protrusion 47 protruding at different heights with respect to the cam surface 48 are shown. The cam follower 22 is always in contact with the cam face 48 or the protrusion 47, the spindle 19 and the component C are in the raised position when in contact with the cam face 48, When in contact with the projection 47 the spindle 19 and the part C are in the lowered position.

In FIG. 4A, two adjacent cam followers 22 simultaneously contact the top surface of the projection 47 such that the two spindles 19 are in the lowered position at the same time. That is, the two spindles 19 can simultaneously adsorb or mount the part. In contrast, in FIG. 4B, only one spindle 19 is in contact with the top surface of the protrusion 47, and two adjacent spindles are in contact with the inclined surface of the protrusion 47. Thus, only one spindle can adsorb or mount the part. In other words, depending on the rotational position of the cam 21, two spindles 19 can be lowered simultaneously or only one spindle can be lowered. This feature demonstrates that multiple nozzle head devices can be operated in a variety of ways, thereby improving operational efficiency.

5 schematically shows a mechanism for rotating the movable mirror 30.

Referring to the figure, the movable mirror 30 is supported at the end of the support part 51. The support part 51 is rotatably supported with respect to the mount 11 which is not shown in the hinge shaft 52. One end of the spring 56 is fixed to one side of the support 51, and the spring 56 serves to pull the support 51. The other end of the spring 56 is fixed relative to the mount. On the other hand, the mount 11 is provided with a sliding cam 53, the sliding cam 53 is lifted by the driving force of the drive (not shown). The sliding cam 53 has a cam surface 54 composed of a narrow portion and a wide portion as shown in the figure.

The sliding cam 53 is in contact with the cam follower 55 provided on one side of the support 51. In the state in which the sliding cam 53 is raised, a wide portion of the cam surface 54 comes into contact with the cam follower 55, and accordingly, the support 51 rotates against the elastic force of the spring 56. The movable mirror 30 may be disposed below the support 51. The image of the component C adsorbed by the nozzle at this position can be imaged by the imaging camera 14 (FIG. 2) via the movable mirror 30 and the fixed mirror 30. As shown in FIG.

On the other hand, when the sliding cam 53 is lowered, the narrow portion of the cam surface 54 comes into contact with the cam follower 55 as indicated by the broken line. Accordingly, the elastic force of the spring 56 causes the support 51 to rotate clockwise, and the movable mirror reaches the position indicated by the reference numeral 30 '. In this position, imaging of the component cannot be performed, but the movable mirror does not interfere with the lifting of the component adsorption nozzle 29.

Hereinafter, the operation of the multi-nozzle head device according to the present invention will be described schematically.

The multi-nozzle head device reciprocates between the component tray and the substrate so that the electronic components can be picked up from the component tray and mounted on the substrate. At this time, the multi-nozzle head device has a long distance lifting action and a short distance lifting action at a position set on the component tray and the substrate. The remote lifting action corresponds to the lifting and lowering of the entire multiple nozzle head device as a single unit, which consists of, for example, a ball screw drive device or a position control motor connected to a belt pulley. In the embodiment shown in Fig. 1, the mount 11 of the multi-nozzle head device is moved up and down along the guide rail 13 by the drive device for remote lifting, so that the remote lifting is performed. On the other hand, the short distance lifting action of the multi-nozzle head device is made by the action of the cam 21 described in FIG. This short distance lifting action corresponds to the case where the adsorption nozzle 29 moves over a very short predetermined stroke during adsorption and mounting of the component C.

At the time of the adsorption of the parts, for example, by the operation of the X-Y Cartesian coordinate robot, the multi-nozzle head device moves to the position where the parts tray is installed. The spindle 19 provided with the suction nozzle 29 at the top of the component tray can be arranged as shown in FIG. 2. That is, the paired spindles 19 can be lowered at the same time to simultaneously adsorb the parts C arranged side by side on the part tray 42. At this time, the protrusions 47 of the cam 21 correspond to the pair of spindles 19 as shown in FIG. 4A. In contrast, when only one component needs to be absorbed or mounted, the protrusion 47 corresponds to one spindle 19 as shown in FIG. 4B.

After adsorbing the component C, the component C is imaged by the imaging camera 14 in order to inspect the adsorption state of the component C to the nozzle 29. To this end, the rotary head 17 is rotated using the power of the head rotation driving motor 16. That is, the rotation of the pulley 27 rotates the rotary head 17 through the belt 28, and the spindle 19 inserted into the rotary head 17 comes to the upper portion of the movable mirror 30. At this time, if the component (C) and the movable mirror 30 causes mutual interference, it is eliminated by changing the position of the movable mirror (30).

The position change of the movable mirror 30 is made by lifting and sliding the sliding cam 53, as described with reference to the bar shown in FIG. When the sliding cam 53 is lowered, the support 51 is rotated to the position indicated by the reference numeral 30 'by the elastic force of the spring 56, so that the component C adsorbed to the nozzle 29 is moved by the movable mirror ( 30) shall not cause interference. The change of the position of the movable mirror 30 can be made not only at the time of rotation of the rotary head 17 but also at the time of suction / mounting of the component C. The slight positional error caused by rotating the adsorbed component or upon adsorption can be compensated for by rotating the entire rotary head or corrected by an X-Y Cartesian robot.

In the multi-nozzle head device according to the present invention, the drive unit for driving each spindle has a simplified structure by a cam mechanism, so that the device can be made compact and light in weight. Accordingly, it is possible to accelerate or decelerate the device, and there is an advantage that the suction / mounting of the component is quick and accurate.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, it is merely exemplary, and those skilled in the art may various modifications and other equivalent embodiments therefrom. You will understand. Therefore, the true scope of the invention should be defined only by the appended claims.

Claims (3)

A mount for lifting along the guide rail; A rotary head rotatably mounted relative to the mount; A plurality of spindles installed in the rotary head, and a nozzle for suction / mounting the component installed at an end of the spindle; A spring supported at both ends between the spindle and the mount to provide an elastic force for raising the spindle; A cam follower provided on an upper portion of each spindle; A cam for selectively lowering the spindle by contacting the cam follower; A cam drive motor mounted to the mount to drive the cam to rotate; A head rotation drive motor fixed relative to the mount to rotationally drive the rotary head; A multiple nozzle head device for a component mounter having a pulley and a belt for transmitting a driving force of the head rotation driving motor to the rotary head. The component as claimed in claim 1, wherein the cam is provided with a cam surface at the same height and a protrusion projecting at a different height with respect to the cam surface, and the cam follower is a roller contacting the cam surface and the protrusion. Multiple nozzle head unit for mounter. The method of claim 1, A sliding cam installed to move up and down with respect to the mount; A support part rotatably installed with respect to the mount and having a cam follower in contact with the sliding cam on one side; A movable mirror installed at one side of the support part; A spring connected between one side of the support and the mount; An imaging camera fixed relative to the mount; And a fixed mirror fixed to the mount at the bottom of the imaging camera.