KR101070900B1 - Stopper for printed circuit board - Google Patents

Abstract

The present invention discloses a printed circuit board stop device for use in a surface mounter. A printed circuit board stop device according to an embodiment of the present invention, the pair of carrier rail for moving the printed circuit board; A stop piece of a pivot movement type installed at an outer side of the rail to stop a printed circuit board moving along the rail; And an actuator for driving the stop piece. According to still another aspect of the present invention, there is provided a printed circuit board stopping device including: a pair of carrier rails to which the printed circuit board is moved; A stop piece of a pivot movement type installed at an outer side of the rail to stop a printed circuit board moving along the rail; An actuator for generating a driving force for driving the stop piece; And a plurality of links and a plurality of rotating plates connected to each other to transmit the driving force of the actuator to the stop piece.

Description

Printed circuit board stopper {Stopper for printed circuit board}

1 is a perspective view of a conventional printed circuit board stop device.

2 is a plan view of a printed circuit board stopping apparatus according to a first embodiment of the present invention.

3 is a cross-sectional view showing an operating state in a cross section taken along the line II ′ of FIG. 2.

4 is a plan view of a printed circuit board stopping apparatus according to a second exemplary embodiment of the present invention.

FIG. 5 is a front view of the printed circuit board stopping apparatus according to the second embodiment of FIG. 4.

6 is a schematic diagram showing the operating principle of a printed circuit board stopping apparatus according to a second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110, 210: printed circuit board 112: stop piece

114: rail support 116: overrun prevention jaw

118: actuator 120: rotation axis

122: buffer part 124: transport rail

214: drive link 216: drive link hinge

218: First link 220: First link hinge portion

222: lower rotating plate 228: second link

232: upper rotating plate 236: stop piece                 

240: conveyance rail

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper of a printed circuit board used in a surface mounter, and more particularly, to a stopper of a printed circuit board used in a conveyance unit for carrying a printed circuit board of a surface mounter.

1 shows a printed circuit board fixing device of a conventional surface mounter. Referring to Figure 1, the conventional fixing device provides a path for moving the printed circuit board (A) to a predetermined surface mount working position, horizontal transfer means 17 are installed symmetrically so as to be parallel to each other at a predetermined distance apart ). The horizontal moving means 17 includes a frame 11 and a conveyor belt 16 installed on the frame 11.

In addition, the conventional circuit board fixing device of the chip mounter is coupled to the frame 11 by a tension coil spring 13a, which is a tensioning means, to elastically bias the printed circuit board A upward. a vertical moving means (13) called a clamp, a stopper member (15) provided at the vertical moving means (13) to stop horizontal movement of the printed circuit board (A), and the stopper member (15). The stopper member guide bar 14 is installed so as to be mutually coupled by changing its position.

In addition, a cover bracket provided on the frame 11 of the horizontal moving means 17 by supporting the printed circuit board A to the surface 11 of the conventional printed circuit board fixing device to enable the surface mounting operation. A part 11b is provided, and the cover bracket part 11b may be separately manufactured and coupled to the frame 11.

The above-described conventional printed circuit board fixing device is operated as follows.

First, in order to load the printed circuit board A, the width interval between the horizontal moving means 17 is adjusted according to the width standard of the printed circuit board A. Next, the width interval between the stopper horizontal moving means 17 is adjusted in accordance with the length standard of the printed circuit board (A). Next, the position of the stopper member 15 is adjusted in accordance with the length standard of the printed circuit board A. At this time, the center of the printed circuit board A should be aligned with the center of the printed circuit board fixing device. Therefore, the stopper member 15 is moved on the stopper member guide bar 14 by the size of the printed circuit board A, and then the stopper member 15 is manually adjusted to be fixed.

Subsequently, when the printed circuit board A enters the printed circuit board fixing apparatus by the conveyor belt 16 driven by the driving means, not shown, the stopper member 15 stops at a predetermined position. Next, the vertical movement means 13 for supporting the printed circuit board A to the printed circuit board fixing device such that a component such as a chip is surface-mounted by a mounting device (not shown) on the printed circuit board A. ) Is elastically biased to the top by the tension coil spring (13a) to support and fix the printed circuit board (A) by pushing with a constant force from the bottom.

However, in the above-described conventional chip mounter of the printed circuit board fixing device, in order to always position the printed circuit board (A) in the center of the printed circuit board fixing device, whenever the size of the printed circuit board (A) is changed. Since the position of the stopper member 15 must be manually adjusted manually, there is a disadvantage in that the adjustment work is cumbersome, and also due to the configuration of the complicated device including the stopper member guide bar 14 for the adjustment of the PCB fixing device. There is a problem that the manufacturing cost rises.

In addition, since the relative position of the printed circuit board (A) and the printed circuit board fixing device changes every time, the surface is mounted due to the error caused by the position of the printed circuit board is distorted due to the inertia when it stops at zero setting with the mounting equipment. There is a problem that the accuracy of the fall.

The present invention, in order to solve the above problems, even if the size of the printed circuit board is changed accordingly to adjust the distance of the conveying rail accordingly does not manually adjust the printed circuit board stop device, stops on both sides of the conveying rail It is an object of the present invention to provide a printed circuit board stop device that can prevent the distortion when the device is installed and the printed circuit board is stopped.

In order to achieve the above objects and other objects, the printed circuit board stop device according to the first embodiment of the present invention,

A pair of carrier rails to which the printed circuit board is moved;

A stop piece of a pivot movement type installed at an outer side of the rail to stop a printed circuit board moving along the rail;                     

And an actuator for driving the stop piece.

Here, the stop piece may be further provided with an overrun prevention jaw to prevent overrun by operating beyond the limit of a predetermined rotation angle when the pivoting movement.

The overrun prevention jaw preferably includes a shock absorbing portion capable of absorbing the impact.

In addition, the actuator is preferably a rotary actuator that drives the stationary piece to pivot.

On the other hand, the printed circuit board stop device according to a second embodiment of the present invention,

A pair of carrier rails to which the printed circuit board is moved;

A stop piece of a pivot movement type installed at an outer side of the rail to stop a printed circuit board moving along the rail;

An actuator for generating a driving force for driving the stop piece;

And a plurality of links and a plurality of rotating plates connected to each other to transmit the driving force of the actuator to the stop piece.

Here, the rotating plate is installed on the outside of the conveying unit rail, the stop piece is mounted to the upper rotating plate of the rotating plate is connected to the lower rotating plate by a link, the lower rotating plate is connected to the actuator by a link.

In addition, the actuator is a piston type actuator.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

FIG. 2 is a plan view of a printed circuit board stopping apparatus according to a first embodiment of the present invention, and FIG. 3 is a cross-sectional view showing an operating state in a cross section taken along line II ′ of FIG. 2. That is, FIG. 2 is a view showing a case where the printed circuit board conveyed along the rail from the surface mounting apparatus is viewed from above.

Referring to FIG. 2, a pair of carrier rails 124 that extend in parallel to each other and whose spacing is adjustable are integrally installed on the rail support 114. The printed circuit board 110 on which the parts are to be mounted is moved on the carrier rail 124. In general, the printed circuit board 110 is moved by a belt on the carrier rail 124. Since the moving part of the printed circuit board is described in the prior art, a detailed description thereof will be omitted herein. In FIG. 2, the printed circuit board is moved from right to left.

On the other hand, the outer side of the conveying unit rail 124 is provided with a stop piece 112 of the pivot movement method for stopping the printed circuit board 110 moving along the conveying unit rail 124, respectively. The stop piece 112 is pivoted about a rotation axis by a rotary actuator 118 providing a rotational driving force. On the other hand, the stop piece 112 is further provided with an overrun prevention jaw 116 to prevent overrun by operating beyond the limit of a predetermined rotation angle when the pivoting movement.

Referring to FIG. 3, which is a view showing the motion of the stop piece in a section along the line II ′ of FIG. 2, the stop piece 112 has a 'c' shape and has an actuator 118 about the rotation shaft 120. ) To make pivot rotation movement. At this time, the stop piece 112 is pivoted about the rotating shaft 120 provided on the outer side of each of the pair of conveying rails 124 to be located in the space between the conveying rails to stop the printed circuit board, Rotating through the pivoting movement may be located outside the rails out of the space between the conveying rails (124).

Since the stop piece 112 pivots about the rotation shaft 120, the stop piece 112 has a predetermined maximum rotation radius about the rotation shaft 120. At this time, it is preferable that the stationary piece 112 has a rotation radius of the level which does not obstruct the rotation path by the conveyance rail while the stationary piece rotates. Circles indicated by broken lines in FIG. 3 indicate the trajectories of the maximum rotation radius of the stationary piece 112, and arrows indicate the maximum rotation radius.

When the stop piece 112 pivots so as to be positioned between the pair of conveying rails 124, the stop piece 112 blocks the moving path of the printed circuit board moving along the conveying rail 124. do. At this time, the stop piece 112 is installed on each outside of the pair of transport rails 124 to block the traveling path of the printed circuit board while rotating, so that the printed circuit board 110 is stopped at both sides. do. Therefore, since the printed circuit board is stopped by the stop piece at a predetermined position and the stop piece 112 sets the position of the printed circuit board 110 at both sides, the printed circuit board is not twisted when the printed circuit board stops. .

On the other hand, the rotational driving force of the stop piece 112 is generated by the actuator 118 provided on the outer side of the rail support 114 formed integrally with the conveying rail 124. In particular, the pivot rotation of the stationary piece according to the first embodiment of the present invention is generated by the rotary actuator 118 which directly generates the rotational driving force.

If the rotation of the actuator 118 can be accurately controlled, the stop piece can be controlled to stop the operation accurately at the position to block the printed circuit board 110 of the stop piece 112 or the position to allow the passage of the printed circuit board. There will be. That is, the actuator 118 for rotating the stop piece 112 is rotated by a predetermined angular momentum when a command is received from a central controller (not shown) to allow the printed circuit board to flow into the conveying unit. Therefore, the stop piece 112 enters the space between the conveyance rails 124 and the printed circuit board 110 is stopped by the stop piece 112. After the work for mounting the component on the printed circuit board is finished, the central control unit commands the actuator 118, and the stop piece 112 is rotated by the drive of the actuator 118, so that the transport rail 124 It comes to a position outside (shown by broken lines) and the stopping action of the printed circuit board is released. When the printed circuit board is stopped, the stop pieces 112 respectively installed on both of the transport rails 124 do not necessarily need to be operated at the same time, and are always waiting for operation before the printed circuit board 110 reaches a predetermined position. Is enough. Therefore, the time difference according to the rotation of both stop pieces 112 may be ignored.

On the other hand, a separate device is provided to assist the function that the stop piece rotates and stops at a predetermined position.

In particular, even if a command is given to stop the actuator 118 from being driven by the central controller, the stop piece 112 has a tendency to momentarily continue the rotational movement due to inertia. Therefore, the stop piece 112 is provided with an overrun prevention jaw 116 to stop against the inertia according to the pivot rotational movement at the position where the stop piece 112 should stop, and also to prevent vibration at the point where the stop piece stops rotating.                     

As shown in Fig. 3, when the stop piece 112 is located in a space between the conveying rails 124 and stops at a stop position (a position where the stop piece is indicated by a solid line) for stopping the printed circuit board, 112 further protrudes over distance from the rail support 114 integrally formed in the conveying rail 124 by a distance b. In general, it is preferable that the distance b does not protrude more than 15 mm, considering that the corresponding size of the printed circuit board of the transfer unit of the surface mounter is within 30 mm. In this case, an overrun preventing buffer 122 may be installed on the rail support 114 integrally formed on the conveying rail 124 so that the stop piece stops further rotation so that the rotation ends at the predetermined stop position. The overrun prevention buffer 122 is mounted at a predetermined position on a path on which the stop piece 112 pivots. Since the buffer part is in direct contact with the stop piece 112 to prevent overrun of the stop piece 112, the degree of the overrun may be controlled by adjusting the height of the buffer part.

On the other hand, the stop piece 112 is rotated to the outside of the conveying rail to prevent the overrun of the stop piece at the stop release position (the stop piece is shown by broken lines in FIG. 3) where the stop action of the printed circuit board is released. An overrun prevention jaw 116 is provided. The overrun prevention jaw 116 is preferably provided with a separate buffer portion in contact with the stop piece 112 to absorb the impact.

When the stop piece comes to the detent release position indicated by the broken line, it protrudes by a distance a from the rail support 114 and over-hangs. If the distance (a) is too long, an excessive impact may be applied to the overrun prevention jaw by the moment action according to the over-hang, so that it is preferably formed to maintain an appropriate length.                     

Accordingly, the stop piece is stopped accurately without overrun at the stop position and the stop release position, so that the rotation angle of the stop piece is precisely defined.

Next, a second embodiment of the present invention will be described with reference to FIGS. 4 to 6. 4 is a plan view of a printed circuit board stop device according to a second embodiment of the present invention, FIG. 5 is a front view of a printed circuit board stop device according to a second embodiment of FIG. 4, and FIG. 6 is a second view of the present invention. It is a schematic diagram which shows the operation principle of the printed circuit board stop apparatus which concerns on an Example. In FIG. 4, the printed circuit board is moved from right to left.

Unlike the first embodiment described above, in the printed circuit board stopping device according to the second embodiment, the rotational force of the actuator is not directly transmitted to the stationary piece, but the linear reciprocating driving force of the actuator transmits the pivotal rotational force to the stationary piece by the linkage assembly. It is a structure.

4 and 5, a pair of carrier rails 240 extending side by side facing each other and whose spacing is adjustable are installed. The printed circuit board 210 on which the parts are to be mounted is moved on the carrier rail 240.

On the other hand, the outer side of the conveying unit rail 240 is a 'b' shaped stop piece 236 of the pivot movement type to stop the printed circuit board 210 moving along the conveying unit rail 240, respectively. . The stop piece 236 receives a driving force by a plurality of links 214, 218, 228 and the rotating plate 222, 232 actuated by a piston-type actuator 212 reciprocating like a piston, and the upper part of the rotating plate It pivots about the rotation shaft 234 of the rotating plate 232.

Since the stop piece 236 is connected to the upper rotary plate 232 is pivoted in accordance with the rotation of the upper rotary plate. Therefore, the stop piece 236 is a structure extending from the rim of the upper rotating plate 232 to the space between the pair of transport rails 24, the installation height of the upper rotating plate 232 to which the stop piece 236 is connected The printed circuit board 210 is stopped at a predetermined height so that the printed circuit board 210 can be stopped when the upper rotating plate 232 pivots at a predetermined angle. In this case, the upper rotating plate 232 is mounted at a position where the printed circuit board 210 does not interfere with the movement of the transfer rail 240.

A drive link 214 is connected to the piston type actuator 212 provided at an outer side of the conveying rail 240, and the drive link is connected to one end of the first link 218 at the drive link hinge 216. do. In addition, the other end of the first link 218 is connected to the first link hinge portion 220 of the lower rotating plate 222 rotatably installed on the lower portion of the outer portion of the transport rail 240.

On the other hand, the lower rotating plate 222 is linked by a second link 228 to the upper rotating plate 232 located on the upper side. One end of the second link 228 is connected through a lower hinge portion 226 of the lower rotating plate 222, and the other end of the second link 228 is connected to the upper rotating plate 232 of the upper hinge portion 230. Is connected through the structure of the rotating plate to enable the movement of the link according to the movement.

The upper rotating plate 232 and the lower rotating plate 222 rotate about the rotation shafts 234 and 224, respectively.

Structures of the same shape are installed on the conveying rails 240, respectively, to form a pair.

6 is a view illustrating an operating state of the printed circuit board stopping apparatus according to the second embodiment. The stop piece and the link shown in broken lines indicate the stop position at which the stop piece stopped the printed circuit board by blocking the path of the printed circuit board. Indicates the stop release state after releasing the stop state of the printed circuit board.

Referring to Figure 6, the actuator 212 is to reciprocate piston movement from side to side. First, when the drive link hinge portion 216 connected to the actuator is in the stop position (broken line), the lower rotary plate 222 and the upper rotary plate 232 are moved along the movement of the first link 218 and the second link 228 shown as broken lines. The rotating piece 236, which is connected to the upper rotating plate 232, is laid down horizontally by the pivot rotational movement, and is placed in a stop position, shown by a broken line, which blocks the movement of the printed circuit board.

When the actuator 212 performs the piston reciprocating motion in this stop position and the drive link hinge portion 216 is in the solid line position, the first link 218 moves to the left, and thus the first link ( According to the movement of 218, the lower rotating plate 222 connected by the first link hinge portion 220 rotates in a clockwise direction about the rotation shaft 224. As the lower rotating plate 222 rotates in the clockwise direction, the second link 228 connected to the lower rotating plate 222 also moves to the position of the solid line, and is moved to the upper hinge portion 230 by the movement of the second link. The connected upper rotary plate 232 rotates in the counterclockwise direction about the rotation shaft 234. Therefore, the stationary piece 236 installed on the upper rotating plate 232 is brought to the position indicated by the solid line to become the stop release position of the printed circuit board and the printed circuit board can move.                     

In this structure, adjusting the distance between the carrier rails is independent from adjusting the stop position of the printed circuit board. Therefore, even if the distance between the carrier rails is adjusted as the size of the printed circuit board is changed, printing is performed. It is not necessary to reposition the circuit board stopper.

The printed circuit board stop device used in the surface mounter according to the present invention has the following effects.

First, the printed circuit stopper is installed on both sides of the pair of conveyer rails to which the printed circuit board is moved to stop the printed circuit board. Therefore, the printed circuit board is not directly twisted at the stop and is positioned in the right position.

Second, since there is no need to manually adjust the stop piece according to the size of the printed circuit board, there is no fear of equipment damage that may occur when adjusting the width of the conveyer rail due to an operator error.

Third, the position of the stopper of the printed circuit board is also optimized according to the width of the conveyer rail from the user's point of view, thereby reducing the time required for work.

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 (7)

A pair of carrier rails to which the printed circuit board is moved; A rail support for supporting the carrier rail; It has a pivot axis of rotation disposed parallel to each of the rails in the outer side of each of the conveying unit rail, and is formed to be bent into the inner portion of the conveying unit rail is rotated about the pivot axis of rotation part of the traveling path of the printed circuit board A pair of stop pieces capable of moving between a first position intercepting the second position and a second position disposed outside the carrier rail so that the portion is separated from the traveling path of the printed circuit board; A buffer unit disposed above each of the rail supports and supporting the stationary piece when the stationary piece is positioned at the first position, and limiting the rotation of the stationary piece further; An overrun bump that protrudes from the side surface of each rail support to the space below the pivot axis of rotation of the stop piece, supports the stop piece when the stop piece is positioned in the second position, and limits the stop piece from further rotating. ; And Printed circuit board stopping device including a rotary actuator for generating a pivotal driving force of the stop piece. The method of claim 1, The overrun bump is Printed circuit board stopping device having a buffer for absorbing the shock portion in contact with the stop piece. delete delete A pair of carrier rails to which the printed circuit board is moved; It is coupled to the outer side of each of the conveying unit rail, and has a pivot axis of rotation disposed perpendicular to each of the conveying unit rail, is formed to be bent inward of the conveying unit rail, part of the printing when rotating about the pivot axis of rotation A pair of stop pieces capable of moving between a first position blocking an advancing path of the circuit board and a second position moving upwardly such that a portion thereof is separated upward from the advancing path of the printed circuit board; An actuator for generating a driving force for driving the stop piece; And And a plurality of links and a plurality of rotating plates connected to each other to transmit the driving force of the actuator to the stop piece. The method of claim 5, The actuator is, Piston type actuator The plurality of rotating plates, An upper rotating plate coupled to an outer side of each rail, the rotating shaft being disposed perpendicular to the rail at an upper side of the rail, It is coupled to the outside of each rail, the rotary shaft has a lower rotating plate disposed perpendicular to the rail from the lower side of the upper rotating plate, The plurality of links, A drive link coupled to the actuator, A first link connecting the drive link and the lower rotating plate to rotate the lower rotating plate as the drive link moves; A second link connecting the lower rotary plate and the upper rotary plate to the lower rotary plate to rotate the upper rotary plate according to rotation; The stop piece, Printed circuit board stop device coupled to the upper rotating plate. delete

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