KR20080078206A - Chip mounter - Google Patents

Abstract

A chip mounter is provided to reduce a process time for clamping a circuit board by controlling a stroke of a backup table through distance control units. A chip mounter includes a pair of support frames(100), a backup table(200), and distance control units(300). The pair of support frames are in parallel with each other at a predetermined interval and have a circuit board(10). The backup table is arranged under the support frames to be lifted. The distance control units are installed on the support frames to control a distance between lower surfaces thereof and an upper surface of the backup table. The backup table has a support plate(210), a cylinder(230), and a backup pin(220). The support plate faces lower ends of the support frames. The cylinder is installed on a lower surface of the support plate to lift the support plate at a predetermined speed. The backup pin is installed at an upper end of the support plate, and an end thereof clamps a lower surface of the circuit board according to lifting of the support plate.

Description

Surface Mount Device {CHIP MOUNTER}

1 is a cross-sectional view showing an embodiment of a surface mounting apparatus of the present invention.

2 is a cross-sectional view showing another embodiment of the surface mount apparatus of the present invention.

3 is a cross-sectional view showing the distance control unit shown in FIG.

4 is a cross-sectional view showing the distance control unit shown in FIG.

5 is an exploded perspective view showing a distance control unit according to the present invention.

** Description of symbols for the main parts of the drawing **

10: circuit board

100: support frame

110: upper jaw

120: transfer belt

200: backup table

210: support plate

220: backup pin

230: cylinder

300: distance control

310: upper body

320: lower body

321: guide hole

340: distance control member

341: distance control shaft

342: shaft support

343: magnetic body

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mounting apparatus, and more particularly, to a surface mounting apparatus in which an electronic component controls a stroke of a backup table for supporting a circuit board on which single side mounting or double side mounting is performed to prevent the support of the circuit board being supported. will be.

In general, a semiconductor device is manufactured by repeatedly or sequentially performing a plurality of unit processes such as diffusion, deposition, exposure, etching, ion implantation, and cleaning processes. The semiconductor devices manufactured as described above are arranged in plural numbers on the wafer. A plurality of semiconductor elements disposed on the wafer are individually drawn out and manufactured into semiconductor chips.

The semiconductor chips thus manufactured are installed at component mounting positions on a printed circuit board through a surface mounting apparatus.

Such a conventional surface mounter includes a conveyor unit for transferring a circuit board to a component mounting position, a component stage for supporting various electronic components to be mounted on the circuit board, and an electronic component supported on the component stage on a circuit board. It includes a head for vertically moving to suck and mount the electronic components.

The conventional circuit board support apparatus includes a pair of support frames arranged side by side at a predetermined interval from each other, transfer belts arranged side by side at the upper ends of the pair of support frames and belt driven, and the transfer belts to an upper portion thereof. The upper jaw is installed on the upper end of the support frames to cover the conveying belt spaced by a predetermined distance, and the lower end of the support frame has a shaft extending in a predetermined length.

The circuit board support apparatus includes a backup table spaced apart from the bottom of the shafts by a predetermined distance. The backup table includes a support plate having a predetermined area to include the bottom surfaces of the shafts, a cylinder connected to a bottom of the support plate to raise the support plate to a predetermined position, and installed to extend vertically from an upper end of the support plate. When the support plate is raised through the upper end is provided with a backup pin to clamp the bottom of the circuit board transferred by the transfer belt.

The operation of the conventional circuit board supporting apparatus having the above configuration will be described.

First, a circuit board in which electronic components are mounted on both sides will be described.

The circuit board is supported on both sides of the bottom surface of the transfer belt, and is transferred to the component mounting position according to the belt driving of the transfer belt. In this case, the upper jaw covers the circuit board at a predetermined distance from the upper surface of the circuit board.

As such, when the circuit board is transferred to the component device position, the backup table can clamp the circuit board. The operation of the backup table will be described.

The cylinder may receive power from the outside to raise the support plate upwards. At this time, the backup pin installed on the upper end of the support plate is also raised to a certain height. Therefore, the backup pin may contact and clamp the bottom surface of the circuit board. In addition, the upper surface of both sides of the support plate is in contact with the bottom surface of the shaft is prevented the lifting operation.

At this time, the rising height of the support plate is substantially equal to the distance between the top of the backup pin and the bottom of the circuit board. The rising height of the support plate is a height for not interfering with the backup pin and the components mounted on the bottom surface of the circuit board when the electronic component is mounted on both sides of the circuit board. Therefore, as described above, the rising height of the support plate for clamping the circuit board on which the electronic component is to be double-sided mounted may be 2X.

On the other hand, when clamping the circuit board in which the electronic component is cross-section mounted as described above, since the electronic component blade is not mounted on the bottom surface of the circuit board, the rising height of the supporting plate may be X which is half of the 2X.

Accordingly, in the case of the double-sided mounting rather than the single-sided mounting as described above, since the distance between the bottom surface of the circuit board and the backup pin becomes longer, there is a problem in that the rise time of the supporting plate is substantially longer.

In addition, after the electronic component is mounted on the circuit board, when the circuit board is returned to its original position, the support plate is lowered, which also has a problem in that the fall time is long.

In order to solve this problem, the prior art attempted to solve by increasing the driving speed of the cylinder of the backup table, but this results in the sudden rise or fall of the circuit board, and, accordingly, due to the impact on the circuit board to the circuit board Mounted electronic components have a problem that is misaligned or distorted.

In addition, conventionally, in order to solve the problems caused by the increase in the driving speed of the cylinder, a method of reducing the driving speed of the cylinder, and slowly clamping the circuit board has also been proposed. However, this can solve the problem due to the impact of the return to the clamp and the transfer belt of the circuit board, there is a problem that the process time for mounting and withdrawing the electronic component on one circuit board is increased.

Accordingly, the present invention has been made to solve the above-described problems, the first object of the present invention is to provide a surface mounting apparatus that can minimize the impact from the outside to the circuit board when clamping the circuit board. have.

It is a second object of the present invention to provide a surface mounting apparatus capable of shortening the processing time required for clamping a circuit board and increasing a product yield.

The present invention provides a surface mounting apparatus to achieve the above object.

The surface mounting apparatus is installed on the support frame, a pair of support frames at a predetermined interval parallel to each other, a circuit board is introduced therebetween, a backup table disposed on the bottom of the support frame, and lifted, It includes a distance adjusting unit for adjusting the distance between the bottom surface and the top surface of the backup table.

The backup table may include a support plate facing the bottom of the pair of support frames, a cylinder installed at the bottom of the support plate to lift the support plate at a constant speed, and installed at an upper end of the support plate to lift the support plate. In addition, the end thereof is preferably provided with a backup pin for clamping the bottom surface of the circuit board.

The distance adjusting part is fastened to a lower end of the pair of support frames, is opened downwardly, and has a guide hole formed therein, the guide hole being exposed to the outside through the opening, and the guide hole of the fastening body. It is preferable to include a distance adjusting member that is fitted in the sliding movement, and a fastening member for fastening the distance adjusting member to the fastening body.

In addition, the fastening body has an upper body formed with a fitting hole is fitted with an extension shaft extending from the lower end of the support frame, and the lower body is coupled to the upper body, the guide hole is exposed to the outside through the opening; It is preferable to have a nut for fixing the upper body to the extension shaft.

The distance adjusting member may include a distance adjusting shaft having one end extending over the opening, extending to a predetermined distance to the outside through the opening, and a shaft support having a groove corresponding to the size of the fastening member. desirable.

In addition, the shaft support is preferably provided with an elastic member on the bottom surface.

In addition, the fastening body is provided with a magnetic force for generating an attraction force with the fastening member, the fastening member is preferably made of a metal material.

In addition, the pair of support frames are preferably provided with transport belts for supporting the bottom surface of both sides of the circuit board to guide to the upper position of the backup table.

Hereinafter, with reference to the accompanying drawings, it will be described a surface mounting apparatus according to an embodiment of the present invention.

1 is a cross-sectional view showing an embodiment of a surface mounting apparatus of the present invention. 2 is a cross-sectional view showing another embodiment of the surface mount apparatus of the present invention. 3 is a cross-sectional view showing the distance control unit shown in FIG. 4 is a cross-sectional view showing the distance control unit shown in FIG. 5 is an exploded perspective view showing a distance control unit according to the present invention.

Referring to FIG. 1, the surface mounting apparatus of the present invention has a pair of support frames 100 which form a predetermined interval in parallel to each other. The support frames 100 have a predetermined length.

Transfer belts 120 having a predetermined length are provided on the inner side of the pair of support frames 100. Although not shown in the drawings, each of the transfer belts 120 includes rollers that extend across both ends. The rollers provided in each of the transfer belts 120 are connected to the driving motors, respectively. The drive motors provide driving force with rollers. Each of the transfer belts 120 supports bottom surfaces of both sides of the circuit board 10. The circuit board 10 is transferred by the movement of the transfer belts 120.

In addition, an upper portion of both sides of the circuit board 10 seated on the transfer belt 120 at a position spaced a predetermined distance from the upper surface of the transfer belt 120 on the upper end of the support frame 100. Jaw 110 is installed.

The backup table 200 is disposed at the bottom of the support frame 100.

The backup table 200 has a support plate 210 facing the lower end of the pair of support frames 100 and a cylinder installed at the bottom of the support plate 210 to elevate the support plate 210 at a constant speed ( 230 and a back-up pin 220 installed at an upper end of the support plate 210 to raise and lower the support plate 210 and clamp the bottom surface of the circuit board 10. It is provided. A spring S is provided inside the backup pin 220 to provide a predetermined elasticity along its longitudinal direction.

The cylinder 200 has a cylinder body 231 disposed in parallel with the support plate 210 at the bottom of the support plate 210, cylinder shafts 232 protruding from both ends of the cylinder body 231, One end hinge is connected to the end of each of the cylinder shafts 232, the other end is hinged to the bottom surface of the support plate 210 and the other end is hinged to the upper surface of the parallel plate 234 for supporting the ground 233 is provided.

The lower end of the support frame 100 is provided with a distance adjusting unit 300 for adjusting the distance between the upper surface of the backup table 200.

3 and 4, the distance adjusting part 300 is fastened to a lower end of the pair of support frames 100, opened downwardly, and through the opening 321a thereinto to the outside. A fastening body to which the exposed guide hole 321 is formed, a distance adjusting member that slides in the guide hole 321 of the fastening body, and a fastening member 360 which fastens the distance adjusting member to the fastening body. Is preferably provided.

The fastening body is coupled to the upper body 310 and the upper body 310, the upper body 310 is formed with a fitting hole 311 is inserted into the extension shaft 101 extending from the lower end of the support frame 100, the opening ( A lower body 320 having the guide hole 321 exposed to the outside through the 321a and a nut 312 for fixing the upper body 310 to the extension shaft 101 are provided.

In addition, the distance adjusting member 340 has a distance adjusting shaft 341, one end of which extends to the outside through the opening 321a, a predetermined distance to the outside through the opening 321a, and the fastening member 360 It has a shaft support 342 is formed a groove 342a corresponding to the size of. The shaft support 342 may include an elastic member 343 on its bottom surface.

The lower body 320 has a magnetic body 350 for generating an attraction force with the fastening member 360, the fastening member 360 is made of a metal material. The magnetic body 350 may be installed at the lower end of the lower body 320 to surround the opening 321a of the lower body 320.

It will be described embodiments of the surface mounting apparatus of the present invention having the configuration as described above.

1 and 3, an embodiment of the surface mount apparatus of the present invention will be described.

FIG. 1 shows that the stroke of the backup table is adjusted when the electronic component 11 is double-sided mounted on the circuit board 10 transferred to a predetermined position by the transfer belt 120.

In this case, the stroke of the backup table may be 'X' which is the first distance between the bottom surface of the shaft support 342 of the distance adjuster 340 and the top surface of the support plate 210. This distance may be substantially the same as the second distance between the top of the backup pin 220 and the bottom of the circuit board 10.

Here, the first distance and the second distance 'X' is a distance considered in order not to interfere with the electronic component 11 mounted on the top and bottom surfaces of the circuit board 10.

 As shown in FIG. 2, in the case of the cross-sectional mounting in which the electronic component 11 is mounted only on the upper surface of the circuit board 10, the stroke of the backup table 200 can be reduced.

Another embodiment of the surface mount apparatus of the present invention will be described in detail with reference to FIGS. 2 and 4.

In the case where the electronic component is cross-sectional mounted on the upper surface of the circuit board 10, the stroke of the backup table 200 should be reduced to 'X / 2', which is the first distance, which is half of the first distance shown in FIG. 1.

At this time, the first 'distance can be easily adjusted by the distance adjusting unit 300 according to the present invention.

The position of the upper body 310 of the distance adjusting part 300 is fixed to the extension shaft 101 provided at the bottom of the support frame 100 through the nut 312. The first distance may be adjusted through the distance adjusting member 340 sliding in the lower body 320 coupled to the upper body 310.

First, release the fastening member 360 which fastens the lower body 320 and the distance control shaft 341. Therefore, the distance adjusting shaft 341 may be slidably moved by the length of the guide hole 321 of the lower body 320.

When the distance adjusting shaft 341 extends downward and protrudes, one end of the distance adjusting shaft 341 spans the opening 321a of the lower body 320. Therefore, the distance adjusting shaft 341 no longer protrudes downward. Subsequently, the lower body 320 and the distance control shaft 341 are refastened using the fastening member 360.

Accordingly, the shaft support 342 provided at the other end of the lower body 320 and the distance control shaft 341 may be spaced apart from each other, and the fastening member 360 is formed in the shaft support 342 while being spaced apart from each other. May deviate from 342a. At this time, since the elastic member 343, such as a rubber, is provided on the bottom surface of the shaft support 342 to be directly transmitted to the distance adjusting part 300 and the support frame 100 by an external force. It can prevent.

Therefore, the distance adjusting unit 300 according to the present invention protrudes the distance adjusting shaft 341 from the fastening body by a predetermined length, and the first distance shown in FIG. 1 is the first distance shown in FIG. You can adjust the distance. Therefore, the stroke of the backup table 200 can be adjusted.

As shown in FIG. 2, the stroke of the backup table 200 is adjusted to the first distance by the distance adjuster 300.

As shown in FIG. 2, the distance between the upper surface of the support plate 210 and the bottom surface of the shaft support 342 of the distance adjuster 300 is formed at a first distance. The first distance may be substantially the same distance between the top of the backup pin 220 and the bottom of the circuit board 100.

Subsequently, the support plate 210 may be lifted upward by the operation of the cylinder 200. The support plate 210 that is raised in this way is raised by the first 'distance, and the upper surface thereof is in contact with the bottom surface of the shaft support 342 of the distance adjusting unit 300 to prevent the lifting operation. At this time, since the elastic member 343 is provided on the bottom surface of the shaft support 342, the shock between the shaft support 342 and the support plate 210 can be easily absorbed.

In addition, the backup pin 220 provided at the upper end of the support plate 210 supports the bottom surface of the circuit board 10 transferred by the transfer belt 120. In addition, the top surface of the circuit board 10 may have a cross-sectional mounting in which the electronic components 11 are mounted.

After the end surface mounting is completed on the circuit board 10 as described above, the circuit board 10 should be returned to its original position and seated.

At this time, the cylinder 230 may be lowered downward to return the support plate 210 to its original position. Here, the distance that the support plate 210 descends is the first 'distance, which is half the distance of the first distance shown in FIG. 1, so that the descending distance may be relatively short.

In addition, the circuit board 10 may be shortened to a distance that is seated on the upper surface of the transfer belt 120.

Accordingly, since the distance adjusting unit 300 according to the present invention can shorten the stroke of the backup table 200, the distance between the support plate 210 and the circuit board 10 can be reduced. In addition, since the distance between the circuit board 10 and the transfer belt 120 can be reduced, when the circuit board 10 is returned to its original position, the potential energy of the circuit board 10 itself is reduced, Impact generated when the circuit board 10 is seated on the transfer belt 120 may be reduced.

Accordingly, in the present invention, since the impact applied to the circuit board 10 is reduced, it is possible to prevent the electronic components 111 mounted on the upper surface of the circuit board 10 from being misaligned or misaligned at the mounting position.

As described above, the present invention reduces the stroke of the backup table when clamping the circuit board to be cross-sectional mounted, thereby minimizing the external shock applied to the circuit board, thereby causing the electronic components mounted on the circuit board to splash or misalign. It has an effect that can prevent it from becoming.

In addition, the present invention has the effect of increasing the production of the product by reducing the process time required for clamping the circuit board by adjusting the stroke of the backup table using the distance adjusting unit.

In addition, the present invention has the effect of selectively adjusting the stroke of the backup table when the electronic component is mounted on one side or both sides.

Claims (8)

A pair of support frames having a predetermined spacing parallel to each other and having a circuit board inserted therebetween; An elevated backup table disposed at a bottom of the support frame; And The surface mounter is installed on the support frame, and includes a distance adjusting unit for adjusting the distance between the bottom surface and the top surface of the backup table. The method of claim 1, The backup table includes a support plate facing the lower end of the pair of support frames, a cylinder installed at the bottom of the support plate to elevate the support plate at a constant speed, and installed at an upper end of the support plate to raise and lower the support plate. Surface end mounting device, characterized in that the end having a backup pin for clamping the bottom of the circuit board. The method of claim 1, The distance adjusting part is fastened to the lower ends of the pair of support frames, is opened downwardly, the guide hole which is exposed to the outside through the opening therein is formed into the fastening body and the guide hole of the fastening body And a fastening member for fastening the distance adjusting member to the sliding body and the fastening body. The method of claim 3, wherein The fastening body includes an upper body having a fitting hole into which an extension shaft extending from a lower end of the support frame is fitted, coupled to the upper body, and a lower body having the guide hole exposed to the outside through the opening; And a nut for fixing the upper body to the extension shaft. The method of claim 3, wherein The distance adjusting member is characterized in that it has a distance adjusting shaft, one end of which extends to the opening, extends to the outside through the opening at a predetermined distance, and a shaft support having a groove corresponding to the size of the fastening member. Surface mounter. The method of claim 5, And the shaft support has an elastic member on its bottom surface. The method of claim 3, wherein The fastening body is provided with a magnetic body for generating an attraction force with the fastening member, the fastening member is a surface mount device, characterized in that made of a metal material. The method of claim 1, The pair of support frames are surface mounter, characterized in that the transfer belts for supporting the bottom surface of both sides of the circuit board to guide to the upper position of the backup table.

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