KR20070090551A - Printed circuit board supporting unit - Google Patents

Abstract

A printed circuit board supporting unit is provided to reduce a manufacturing cost of the PCB(Printed Circuit Board) by using a shape transformer instead of plural pneumatic cylinders. A printed circuit board supporting unit includes a first support unit(124), a second support unit(134), a cylinder housing(142), a shape transformer(144), and a rod bar(146). The first support unit supports a portion of a lower surface of a PCB. The second support unit has a side support unit and is apart from the first substrate unit, so that the second support unit supports the other lower surface of the PCB. The cylinder housing is arranged on the first support unit. The shape transformer is arranged inside an inner space of the cylinder housing and expanded/contracted to/from the PCB due to a pressure difference between inner and outer portion of the cylinder housing. The rod bar is arranged on an inner space of the synchronous housing. When the shape transformer expands, the rod bar pressurizes the PCB, so that both ends of the PCB are fixed by the rod bar and the side support unit.

Description

Printed circuit board supporting unit

1 is a cross-sectional view showing a substrate support provided in a conventional conventional printed circuit board support apparatus.

2 is a cross-sectional view showing an apparatus for supporting a printed circuit board according to an embodiment of the present invention.

3 is an enlarged cross-sectional view of part A of FIG. 2.

4A to 4B are explanatory views showing the operation of the apparatus for supporting the printed circuit board according to the embodiment of the present invention.

5 is an exploded perspective view showing an example of the structure of the cylinder housing, the shape change member, and the spring member provided in the apparatus for supporting a printed circuit board according to the embodiment of the present invention.

Explanation of symbols on major parts of partial drawings

 18: printed circuit board 100: a device for supporting a printed circuit board

101: backup table 122: first fixing member

124: first support member 126, 136: substrate upper fixing member

126a and 136a: top support 132: second fixing member

134: second support member 134a: side support

142: cylinder housing 144: shape change member

146: rod bar 148: spring member

150: pressure control means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a printed circuit board, and more particularly, to an apparatus for supporting a printed circuit board having a simple structure of a supporting means for supporting a printed circuit board and excellent supporting force.

The apparatus for supporting a printed circuit board is an apparatus which enables the component mounting work by the suction nozzle by supporting the printed circuit board conveyed along the conveyor belt at a predetermined position. The apparatus for supporting a printed circuit board is provided on one side of the component mounter, for example, on a printed circuit board on which a component adsorption nozzle which performs a rectangular coordinate movement and a vertical movement by the operation of the robot is supported by the apparatus for supporting the printed circuit board. Allow components to be mounted on the The component adsorption nozzle repeats a process of adsorbing and mounting a component between a component supply apparatus such as a tray or a tape feeder and a printed circuit board.

In a typical component supply device, a backup table is provided on the upper part of the base frame so that the backup table can be lifted and the substrate support is disposed on the surface of the backup table. By the lifting action of the backup table lifting cylinder mounted on the base frame, the backup table can be lifted at the top of the base frame.

A substrate support is disposed on the backup table. A typical structure of this substrate support is shown in FIG. Referring to FIG. 1, the substrate support 20 has a belt 24 on which the printed circuit board 18 is placed, and a function and a side surface of the printed circuit board 18 that are pushed up from the bottom to clamp in the vertical direction. A support means is provided for performing the function of clamping laterally.

In detail, the supporting member 17 is disposed to be fixed with respect to the backup table, and the lifting member 21 is installed to allow relative movement with respect to the supporting member 17. The elevating member 21 can be elevated by an elevating cylinder (not shown) provided on the backup table. The substrate transfer belt 24 travels on the upper surface of the elevating member 21, and the printed circuit board 18 is supported on the substrate transfer belt 24. The cylinder 22 is installed at one side of the elevating member 21. The rod 26 of the cylinder 22 may press the side of the printed circuit board 18.

On the other hand, the substrate guide 23 is fixed to the upper portion of the support member 17, the substrate contact portion 23a is provided at the end of the substrate guide 23. The substrate contacting portion 23a is provided so that the upper surface of the printed circuit board 18 can contact and clamp the substrate contacting portion 23a when the elevating member 21 pushes up the printed circuit board 18. In this state, the component adsorption nozzle 19 mounts the component and the like is performed while the printed circuit board is clamped to the left and right sides.

However, the cylinder 22 and the rod 26 are used to support the printed circuit board 18, and in order to clamp the narrow printed circuit board, several cylinders should be applied. The cylinder 22 typically uses a pneumatic cylinder, which is complicated in structure, large in size, low in efficiency for space use, and increases in manufacturing cost by requiring several cylinders.

Disclosure of Invention The present invention has been made to solve various problems including the above problems, and to provide an apparatus for supporting a printed circuit board having a simple structure for supporting a printed circuit board, occupying a small size, and reducing manufacturing cost. The purpose.

The present invention to achieve the above object is:

A first support member supporting one end of a lower surface of the printed circuit board;

A second support member having a side support part for supporting a side surface of the printed circuit board, the second support member being spaced apart from the first support member to support the other end of the bottom surface of the printed circuit board;

A cylinder housing disposed above the first support member;

A shape changing member disposed in an inner space of the cylinder housing, the shape changing member stretching at least in the direction of the printed circuit board according to the pressure difference between the inside and the outside of the boundary;

And a rod bar disposed in the inner space of the cylinder housing, the rod including a rod bar for pressing the printed circuit board as the shape change member extends to fix both sides of the printed circuit board together with the side support. To provide.

The shape change member may be made of an elastic body, and may further include pressure control means for controlling the pressure in the shape change member, in which case the pressure control means may include a solenoid valve.

The apparatus may further include a spring member connected between the rod bar and the cylinder housing to return the rod bar to a position before movement when the shape change member is compressed.

In addition, it is preferable that at least the cylinder housing and the shape changing member extend along the side of the printed circuit board.

Meanwhile, a backup table; First and second fixing members fixedly supported to the backup table; It is disposed on the upper side of the first, the second fixing member, and further comprising a substrate upper side fixing member having an upper surface support portion that can be in contact with the upper surface of the printed circuit board, respectively, the first support member and the second support member Are respectively disposed inside the first fixing member and the second fixing member of the backup table, and are at least raised to a position where the upper surface of the printed circuit board supported by the upper surface supporting portion is in contact with the upper surface supporting portion and has a constant play with the upper surface supporting portion. It may be installed in the backup table to descend to a position having a.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view schematically showing an apparatus for supporting a printed circuit board according to an exemplary embodiment of the present invention, and FIG. 3 is an enlarged cross-sectional view of part A of FIG. 2.

2 and 3, the apparatus 100 for supporting a printed circuit board according to the present invention may include a first support member 124, a second support member 134, a cylinder housing 142, and a shape change. The member 144 and the rod bar 146 are provided.

The first support member 124 supports one end of the lower surface of the printed circuit board 18.

The second support member 134 is spaced apart from the first support member 124 to support the other end of the lower surface of the printed circuit board. In this case, the second support member 134 may include a side support part 134a. The side support part 134a is formed to fix the side surface of the printed circuit board 18.

The substrate transfer belt 116 travels on the upper surfaces of the first and second support members 124 and 134, and the substrate transfer belt 116 supports the printed circuit board 18. The suction nozzle 19 can perform component mounting work on the printed circuit board 18.

The first support member 124 and the second support member 134 may be installed on the backup table 101, and the backup table 101 may be installed to be elevated on the base frame 111. In this case, a bush 113 is installed in the base frame 111, and an upper end portion of the guide rod 114 inserted through the bush 113 is fixed to a bottom surface of the backup table 101, and the base frame 111 is fixed to the base frame 111. The rod of the first elevating cylinder 115 fixed to the back may be fixed to the bottom of the backup table 101. According to this, the backup table 101 is elevated by the lifting drive action of the first lifting cylinder 115 and the guide action of the bush 113 and the guide rod 114. Reference numeral 101a denotes a virtual position where the backup table 101 is raised.

Meanwhile, the present invention may further include first and second fixing members 124 and 134. The first and second fixing members 124 and 134 are fixedly supported by the backup table 101. In addition, the substrate is fixed above the first and second fixing members 122 and 132, and has a top support part 126a and 136a to which the top surface of the printed circuit board 18 may contact each other. The members 126 and 136 may be further provided.

In this case, the first supporting member 124 and the second supporting member 134 are disposed inside the first fixing member 122 and the second fixing member 132 of the backup table 101, respectively. The upper surface of the printed circuit board 18 supported by them may be raised to a position contacting the upper surface supporting portions 126a and 136a and lowered to a position having a constant clearance with the upper surface supporting portions 126a and 136a. Accordingly, the longitudinal direction of the printed circuit board 18 may be clamped by the first and second support members 124 and 134 and the top support parts 126a and 136a. In this case, the first and second support members 124 and 134 may be elevated by the second lifting cylinders 121 and 131 installed in the backup table 101.

Referring to FIG. 4A together with FIG. 3, a cylinder housing 142 is disposed above the first support member 124. The shape change member 144 is disposed in the inner space of the cylinder housing 142. The shape change member 144 stretches in the direction of the printed circuit board 18 at least in response to the pressure difference when a pressure difference is generated between the inside and the outside. That is, when a positive pressure flows into the shape changing member 144, the shape changing member 144 swells at least in the direction of the printed circuit board, and when the static pressure is removed, the shape changing member 144 is reduced and returned to its original state. I will go. Therefore, the shape changing member 144 may be made of an elastic body, for example, may be rubber or an elastomer having a property such as rubber.

A rod bar 146 is also disposed in the inner space of the cylinder housing 142. In this case, a rod bar hole 142h is formed at a side of the cylinder housing 142 in the direction of the second support member 134, and the rod bar 146 is inserted to fit into the rod bar hole 142h. The shape changing member 144 may be disposed to be adjacent to or in contact with the rod bar 146. Therefore, as the shape changing member 144 is extended, the rod bar 146 moves by moving according to the stretching force of the shape changing member 144, and a part thereof protrudes out of the cylinder housing 142.

In addition, when the shape change member 144 shrinks, the rod bar 146 moves back to its original position. In this case, the present invention may further include a spring member 148 connecting the rod bar 146 and the cylinder housing 142. The spring member 148 guides the rod member 144 to return to its original position by moving the rod bar 146 when the shape change member 144 is compressed.

Here, the shape of the shape change member 144 may be changed by supplying the positive pressure and the negative pressure in the shape change member 144, and may be performed by the pressure control means 150. In this case, the pressure control means 150 may be a solenoid valve, thereby reducing the size of the pressure control means 150 and enabling accurate pressure control.

Referring to the cylinder housing 142 having such a structure, the rod bar 146, and the mechanism by which the printed circuit board 18 is fixed by the spring member 148, as shown in Figure 4a, the printed circuit The substrate 18 is supported on the belt 116 disposed on the first and second support members 124 and 134. In this case, the shape change member 144 located in the inner space of the cylinder housing 142 is not in an extended state, and thus, the rod bar 146 is also located inside the cylinder housing 142 and the printed circuit board 18. Do not touch.

 Thereafter, as shown in FIG. 4B, when the positive pressure P is added to the shape changing member 144 by the pressure control means 150 to increase the size of the shape changing member 144, a rod bar adjacent thereto is formed. 146 is brought into contact with the rod bar 146 toward the printed circuit board 18 due to the stretching force of the shape changing member 144, so that the load bar 146 is brought to the printed circuit board 18 ), The printed circuit board 18 is clamped by the side support 134a and the load bar 146.

After that, when it is not necessary to support the printed circuit board 18 in the lateral direction, a negative pressure is supplied to the shape changing member 144, thereby reducing the size of the shape changing member 144, and thus the spring member. The rod bar 146 is moved back to its original position by the compression force of 148.

Meanwhile, as shown in FIG. 5, at least the cylinder housing 142 and the shape changing member 144 may be extended along the side surface of the printed circuit board 18. That is, by making the cylinder housing 142 and the shape changing member 144 larger in accordance with the printed circuit board length, unlike the conventional pneumatic cylinder, a plurality of cylinder housings 142, etc. are not necessary, thereby reducing manufacturing costs. The size of the printed circuit board support device 100 is reduced.

In addition, the rod bar 146 may be the same size along the shape changing member 144 or a plurality of rod bars 146 may be disposed at a proper position, thereby fixing the rod bar 146 to the printed circuit board 18 in a lateral direction with a constant force. Can be. This allows the high precision work on the printed circuit board 18, there is an advantage that can be used regardless of the size of the printed circuit board 18.

According to the present invention, the cost is reduced, the overall size is reduced, and the manufacturing cost is reduced by using the shape changing member without using a plurality of pneumatic cylinders.

Although the present invention has been described with reference to the embodiments shown in the 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. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (6)

A first support member supporting a portion of the lower surface of the printed circuit board; A second support member having a side support part supporting a side surface of the printed circuit board, the second support member being spaced apart from the first support member to support the other end of the bottom surface of the printed circuit board; A cylinder housing disposed above the first support member; A shape change member disposed in an inner space of the cylinder housing and configured to stretch at least in a printed circuit board direction according to a pressure difference between the inside and the outside of the boundary; And a rod bar disposed in the inner space of the cylinder housing, the rod including a rod bar for pressing the printed circuit board as the shape change member extends to fix both sides of the printed circuit board together with the side support. . The method of claim 1, The shape changing member is made of an elastic body, And a pressure control means for controlling the pressure in said shape changing member. The method of claim 2, And said pressure control means comprises a solenoid valve. The method of claim 1, And a spring member connected between the rod bar and the cylinder housing to return the rod bar to the position before movement when the shape change member is compressed. The method of claim 1, At least the cylinder housing and the shape changing member extend along the side of the printed circuit board. The method of claim 1, A backup table; First and second fixing members fixedly supported to the backup table; It is disposed on the upper side of the first, the second fixing member, and further provided with a substrate upper side fixing member having an upper surface support that can be in contact with the upper surface of the printed circuit board, respectively, The first supporting member and the second supporting member are disposed inside the first fixing member and the second fixing member of the backup table, respectively, and at least an upper surface of the printed circuit board supported by the upper surface is in contact with the upper surface supporting part. A device for supporting a printed circuit board mounted to the backup table to ascend to a position and descend to a position having a constant clearance with the upper surface support.

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