KR100900484B1 - Mechanism for driving nozzle of chip mounter - Google Patents

Abstract

The nozzle drive mechanism of the component mounter which concerns on this invention is a drive motor; A rotating plate installed on the rotating shaft of the driving motor and having a first coupling protrusion shaft spaced apart from the rotation center by a predetermined interval; Drive pulleys arranged in one line on one side of the rotating plate and having a second coupling protrusion shaft spaced apart from the rotation center at predetermined intervals; Driven pulleys installed in parallel with the drive pulleys and connected as pairs of drive pulleys and belts to transmit power, and to which nozzles are installed at respective rotation centers; And a connecting member in which coupling holes are formed so that the first and second coupling protrusion shafts can be inserted and installed.

Description

Mechanism for driving nozzle of chip mounter

BRIEF DESCRIPTION OF THE DRAWINGS The top view which shows an example of the nozzle drive mechanism of the mounter conventionally.

2 is a plan view showing another example of the nozzle drive mechanism of the mounting apparatus in the related art.

Figure 3 is an exploded perspective view of the nozzle drive mechanism of the component mounter according to an embodiment of the present invention.

4 is a plan view of the assembled state in FIG.

5 to 7 are plan views showing the nozzles rotated by 90 degrees, 180 degrees, and 270 degrees in the nozzle drive mechanism of FIG. 4, respectively.

<Brief description of the major symbols in the drawings>

31..Driving pulley 31..Secondary engaging projection shaft

32.pulled pulley 33.belt

34. Drive motor 35. Swivel

35a. First engaging projection shaft 36. Connecting member

41..Nozzle

The present invention relates to a component mounter, and more particularly, to a nozzle driving mechanism of a component mounter having an improved structure for driving a nozzle of the component mounter.

The component mounter is a core equipment of the component mounting assembly equipment for mounting a component on a printed circuit board. The component mounter is a device that receives various components from a component supplier and transfers them to the mounting position of the printed circuit board and then mounts them on the printed circuit board.

In general, a component mounter includes a feeder portion for supplying mounting components, a conveyor portion for conveying a printed circuit board to be worked on, a head portion for picking up mounting components from the feeder portion, and mounting them on a printed circuit board.

Recently, a plurality of nozzles tend to be provided in the head portion in order to increase the efficiency of component mounting. Here, since the weight of the head increases when the motor is used for each axis installed in each nozzle for the rotation of the nozzles, it is necessary to rotate the plurality of nozzles with one motor.

As a related art, the nozzle driving mechanism of the mounting machine disclosed in Japanese Patent Laid-Open No. 8-316698 is shown in FIG.

As shown, a plurality of nozzle members 12 are arranged in a row on the frame 11 of the head unit which is movable across the component supply side and the mounting side, and each nozzle member 12 is freely rotatable. Each nozzle member 12 is rotated by one motor 13 and a power transmission means. The power transmission means is provided with a pair of upper and lower transmission belts 14 which are simultaneously rotationally driven by the motor 13. In addition, the electric pulley 15 and the idle pulley 16 are mounted on the shaft of each nozzle member 12, and the nozzle member 12 adjacent to each other has the electric pulley 15 and the idle pulley 16 upside down. It is arranged. Since the electric belt 14 is provided in the electric pulley 15 and the idle pulley 16, each nozzle member 12 is rotatable in one direction at the same time. In addition, since the electric pulley 15 can be engaged and released with respect to the shaft, phase shift in the rotational direction of the nozzle member 12 can be easily corrected.

Fig. 2 shows a nozzle drive mechanism of the mounting machine disclosed in Japanese Patent Laid-Open No. 8-330791 as another related art.

As shown, the plurality of nozzle members 22 arranged in a row on the frame 21 of the head unit are freely rotatable, respectively, and rotated by two motors 23 and 24 and a power transmission means. Done. The power transmission means has a pair of upper and lower transmission belts 25 which are simultaneously rotationally driven by the motors 23 and 24, and the electric pulley 26 and idle pulley 27 on the shaft of each nozzle member 22. And the nozzle member 22 adjacent to each other, the electric pulley 26 and the idle pulley 27 are arranged up and down, the electric belt 25 is installed on the electric pulley 26 and the idle pulley 27, respectively. It is. Accordingly, the nozzle members 22 may be independently rotatable in two groups. In other words, while mounting the component by the nozzle members 22 in one group, the position of the rotation direction of the component can be determined by rotating the nozzle members 22 which adsorb the component in the other group.

However, according to the above-described prior art, simply connecting the belts in series increases the phase difference in the rotational direction of the nozzle members. When the belts are superimposed in order to reduce the phase difference, a motor having a larger capacity is required, and there is a problem in that maintenance and maintenance are difficult.

The present invention is to solve the above problems, to provide a nozzle drive mechanism of the component mounter that can simplify the structure of the drive mechanism for driving the nozzles with one drive motor, while reducing the phase difference in the rotational direction of the nozzle. The purpose is.

The nozzle drive mechanism of the component mounter according to the present invention for achieving the above object,

A drive motor;

A rotating plate installed on the rotating shaft of the driving motor and having a first coupling protrusion shaft spaced apart from the rotation center by a predetermined interval;

Drive pulleys disposed on one side of the rotating plate and formed with a second coupling protrusion shaft spaced apart from the rotation center at a predetermined interval;

Driven pulleys installed in parallel with the drive pulleys and connected to each pair of drive pulleys as a belt to transmit power, and having nozzles installed at each rotation center; And

And a connecting member having coupling holes formed therein so that the first and second coupling protrusion shafts can be inserted and installed.

The relative positions of the first and second coupling protrusion shafts with respect to the rotation center of the rotating plate and the driving pulleys are the same.

The first and second coupling protrusion shaft and the coupling work is characterized in that the bearing is interposed.

The ratio of the rotational speed between the drive motor and the driven pulley may be set by adjusting the ratio of the radius between the drive pulley and the driven pulley.

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

3 is an exploded perspective view of the nozzle driving mechanism of the component mounter according to the exemplary embodiment of the present invention.

The nozzle drive mechanism of the component mounter is movable across the component supply side and the mounting side, and rotates a plurality of nozzles provided in the head mounted on the printed circuit board. And driven pulleys 32 spaced apart from the driving pulleys 31 by a predetermined distance.

Each drive pulley 31 is paired with a corresponding pulley 32 corresponding thereto, and the belt 33 is interposed therebetween, so that the driven pulley 32 also rotates in accordance with the rotation of the drive pulley 31. Can be done.

A drive motor 34 is installed as a drive means at a position spaced apart from the drive pulleys 31 by a predetermined interval. The drive motor 34 is preferably a servo motor. The rotating plate 35 is coupled to the driving shaft drawn out from the driving motor 34, and the first coupling protrusion shaft 35a protruding therefrom is formed on the upper surface of the rotating plate 35. In addition, a second coupling protrusion shaft 31a protruding therefrom is formed on an upper surface of each of the driving pulleys 31.

The first coupling protrusion shaft 35a is positioned away from the center of the rotating plate 35 by a predetermined distance d, and the second coupling protrusion shaft 31a is also a predetermined distance d from the center of the driving pulley 31. Are located off The distance d of the first coupling protrusion shaft 35a with respect to the center of the rotating plate 35, that is, the relative position and the deviation of the second coupling protrusion shaft 31a with respect to the center of the driving pulley 31. The distance d, i.e. the relative position, is the same.

The first and second coupling protrusion shafts 35a and 31a are respectively inserted into the connection member 36. To this end, the coupling member 36 has a plurality of coupling holes 36a formed to correspond to the first and second coupling protrusion shafts 35a and 31a. The connecting member 36 has a plate shape. Preferably, the bearing 37 is interposed between the coupling hole 36a and the first and second coupling protrusion shafts 35a and 31a so that the first and second coupling protrusion shafts 35a may be disposed relative to the coupling hole 36a ( 31a).

A nozzle 41 is installed on the rotation shaft of each driven pulley 32, and the nozzle 41 is mounted on a printed circuit board by absorbing components. The nozzle 41 is rotated by the nozzle driving mechanism described above to determine the mounting position of the component.

4 shows a state in which the nozzle driving mechanism of FIG. 3 is assembled.

Referring to the drawings, in the nozzle drive mechanism, the drive pulleys 31 and the driven pulleys 32 are spaced apart from each other at predetermined intervals. In addition, a belt 33 is interposed between the driving pulley 31 and the driven pulley 32 corresponding to each other so that the driven pulley 32 may also rotate as the driving pulley 31 rotates.                     

In the coupling holes 36a formed in the connection member 36, first coupling protrusion shafts 35a protruding from the upper surface of the rotating plate 35, and second protrusions protruding from the upper surfaces of the driving pulleys 31, respectively. Coupling projection shafts 31a are inserted. A bearing 37 is interposed between the first and second coupling protrusion shafts 35a and 31a and the coupling hole 36a. The relative position of the first coupling protrusion shaft 35a with respect to the center of the rotating plate 35 and the relative position of the second coupling protrusion shaft 31a with respect to the center of the driving pulley 31 are the same. to be.

When the rotating plate 35 is rotated by the drive motor 34, the first coupling protrusion shaft 35a rotates in a predetermined trajectory accordingly. On the other hand, since the second coupling protrusion shaft 31a is inserted and installed in the connection member 36, the second coupling protrusion shaft 31a is also the same trajectory according to the trajectory of the rotation of the first coupling protrusion shaft 36a. Will rotate. Since the second coupling protrusion shaft 31a is formed on the upper surface of each driving pulley 31, the driving pulley 31 rotates accordingly.

As the driving pulley 31 rotates, the belt 33 rotates, and the driven pulley 32 rotates according to the rotation of the belt 33. By the nozzle drive mechanism, the nozzle 41 provided on the rotating shaft of the driven pulley 32 may be rotated by 90 degrees, 180 degrees, and 270 degrees, respectively, as shown in FIGS. 5 to 7.

The rotation angle of the nozzle 41 is adjustable by controlling the rotation amount of the drive motor 34, and thus the position of the component adsorbed by the nozzle 41 can be determined.

On the other hand, the ratio of the rotational speed between the drive motor 34 and the driven pulley 32 can be set by adjusting the ratio of the radius between the drive pulley 31 and the driven pulley 32.

As described above, the nozzle drive mechanism of the component mounter according to the present invention can simplify the structure of the drive mechanism for driving the nozzles with a single drive motor, thereby facilitating maintenance and repair, There is an effect that can reduce the phase difference.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

Claims (3)

A drive motor; A rotating plate installed on the rotating shaft of the driving motor and having a first coupling protrusion shaft spaced apart from the rotation center by a predetermined interval; Drive pulleys disposed on one side of the rotating plate and formed with a second coupling protrusion shaft spaced apart from the rotation center at a predetermined interval; Driven pulleys installed in parallel with the drive pulleys and connected to each pair of drive pulleys as a belt to transmit power, and having nozzles installed at each rotation center; And And a connecting member having coupling holes formed therein so that the first and second coupling protrusion shafts can be inserted and installed. And a relative position of the first and second engaging projection shafts relative to the rotation center of the rotating plate and the driving pulleys is the same. The method of claim 1, The nozzle driving mechanism of the component mounting machine, characterized in that the bearing is interposed between the first and second coupling projection shaft and the coupling hole. The method of claim 1, And the ratio of the rotational speed between the drive motor and the driven pulley can be set by adjusting the ratio of the radius between the drive pulley and the driven pulley.

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