JPH0810239Y2 - Electronic component positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a sandwich type positioning device for electronic components.

[Prior art and its problems]

Generally, in the electronic component automatic mounting device that automatically mounts IC chip components such as SOP and QFP on the circuit board, after the electronic component to be mounted is sucked by the suction nozzle of the mounting head, the position of the suction position is corrected. (Positioning). FIG. 8 is a schematic sectional view showing a conventional electronic component positioning device used for the positioning.

In FIG. 8, the tip of the piston 81 that reciprocates vertically by an air cylinder (not shown) and the two holding claws 82, 82 facing each other form two pairs of holding claws (only one set is included). (Shown in the figure) are connected by a link mechanism L. A mounting table 83 is installed above the piston 81, and the electronic component A to be positioned is mounted on the tip of the mounting table 83. Each holding claw 82 is mounted on a slide base 84, and each slide base 84 slides on each slide rail 85, 85 extending horizontally about the mounting base 83. It is installed freely.

Therefore, when the piston 81 rises, the holding claws 82 are separated from the positioning portion P at the tip of the mounting table 83 via the link mechanism L, and the lowering of the piston 81 causes the holding claws 82 to move to the positioning portion P.
Close to. The four holding claws 82 hold the electronic component A placed on the positioning portion P in two directions orthogonal to each other by the two holding claws 82 facing each other, and the center of the electronic component coincides with the center of the positioning portion P. Correct its position as you do.

However, in the case of the above-described positioning device, since the vertical reciprocating linear movement is changed by 90 degrees in the left-right direction, the link mechanism L becomes complicated and the positioning device becomes large in size.
Further, since the link mechanism L becomes complicated, mechanical rattling is likely to occur, and the positioning accuracy tends to decrease.

[Purpose of device]

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a small-sized and inexpensive electronic component positioning apparatus capable of stably maintaining a high degree of positioning accuracy.

[Key points of device]

The above-mentioned object is that four columns are erected on the base, a substantially square top plate is fixedly mounted on the upper portions of the columns, and four slides are slidable on four sides of the top plate. A hollow shaft member that is installed and vertically supported on the base and serves as a positioning portion for mounting an electronic component whose upper end surface is to be positioned, and a central portion of the top plate that adsorbs and holds the electronic component on the positioning portion. The component suction means provided, the four holding claws provided so as to be able to move closer to and away from the base from four directions orthogonal to each other with respect to the positioning portion, and the shaft member are provided with a pair of upper and lower rotary levers. Each of them is rotatably externally inserted, a linking protrusion is formed at the center of the upper rotary lever, and a linking pin erected on the lower rotary lever is engaged with the linking protrusion in an orthogonal posture to allow both rotations. U-shaped cam recesses are formed at the respective ends of the lever, and the lower parts of the sliding parts at the four locations are formed in the cam recesses. Is advanced a roller provided, said 4
An interlocking mechanism for synchronously moving the sandwiching claws and locking bolts are planted in the vicinity of the cam recesses, respectively, and locking bolts are planted at the tip end side of the roller position on the lower surface of each slide base. Biasing means for tensioning each of the four locking bolts so that the rotary levers and the rollers are always in contact with each other to urge the clamping claws toward the positioning portion, and the clamping means. One of the nails
A reciprocating linear drive means for pressing the individual piece in the direction away from the positioning portion parallel to the base against the biasing means,
In the vicinity of the cam concave portion that engages with the roller on the sliding table side on which the reciprocating linear drive means is abutted on the lower surface of the lower rotation lever,
An electronic device characterized in that a locking pin is provided upright to lock one end of a component holding tension spring, and the other end is locked to a locking bolt fixed to a spring locking plate installed at the end of the base. This is accomplished by providing a component positioner.

[Example of device]

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7.

FIG. 1 is an elevational view of an electronic component positioning apparatus as an embodiment of the present invention, and FIG. 2 is a plan view thereof. In FIG. 1, four columns 2 (one on the front side) are attached to one end on the base 1.
Only books are shown), and the top plate 3 is fixedly installed on top of them. The top plate 3 has a square shape as shown in FIG. 2, and four slides 4a to 4d are slidably installed on the four sides of the square. The top plate 3 is not limited to a square,
It may be formed in a rectangular shape. At the bottom of each slide 4a-4d,
Rollers 5a to 5d (rollers 5c not shown) serving as cam followers are installed, respectively. Four holding claws 6 are detachably attached to each of the slides 4a to 4d, one by one.

A cylinder bracket 7a is erected on the front center of the base 1, and the air cylinder 7 is fixedly supported by the cylinder bracket 7a in a posture in which the air cylinder 7 extends in parallel with the base 1. The tip of the piston rod 7b that expands and contracts from the air cylinder 7 is brought into contact with the side surface of the front slide base 4a via the attachment 8.

FIG. 3 is a sectional view taken along line III-III of FIG. As shown in the figure, a suction nozzle 9 is installed at the center of the top plate 3, and the electronic component A to be positioned is suction-held at the upper end of the suction nozzle 9. At the center of the back surface of the top plate 3, a center shaft 10 is erected downward. The center shaft 10 is formed in a hollow shape, and the hollow passage 10a and the vent hole 9 of the suction nozzle 9 are formed.
a is in communication. A vacuum pump (not shown) is connected to the lower part of the center shaft 10 to perform suction, and the suction nozzle 9
The electronic component A is adsorbed on the tip.

The center shaft 10 includes a pair of upper and lower rotating levers 11,1.
2 is externally rotatably inserted through bearings 13 and 13, respectively. At the center of the upper rotary lever 11, IV-IV in FIG.
As shown in FIG. 4 which is a sectional view taken along the line, a linking protrusion 11a is formed. The linking protrusion 14 is engaged with the linking pin 14 provided upright on the lower rotary lever 12, so that both rotary levers 11 and 12 can rotate integrally. In this case, the link pin
The standing position of 14 is set so that the pair of rotary levers 11 and 12 are engaged with each other in an orthogonal posture. Both rotation levers 11, 12
U-shaped recessed cam recesses 11b and 12b are formed at the respective end portions of each. The rollers 5a to 5d provided under the four sliding portions 4a to 4d described above are inserted into the cam concave portions 11b and 12b. Therefore, the opposing slides 4a, 4c and 4b, 4d are
Synchronous slide in opposite directions via the rotary levers 11 and 12, respectively.

As shown in FIG. 5 which is a bottom view of FIG.
Locking bolts 15 are planted in the vicinity of 11b and 12b, respectively. Further, locking bolts 16 are planted on the lower surfaces of the slides 4a to 4d on the tip side from the standing positions of the rollers 5a to 5d. A tension spring 17 is stretched between the four sets of locking bolt pairs 15 and 16. This allows each rotary lever
11, 12 are always urged to rotate in the clockwise direction (counterclockwise direction in FIG. 4) and brought into contact with the rollers 5a to 5d. Accordingly, the rotary levers 11 and 12 can be smoothly reciprocally rotated without rattling in conjunction with the reciprocating linear movement of the rollers 5a to 5d.

In the present embodiment, on the lower surface of the lower rotating lever 12, a locking pin 18 is provided upright in the vicinity of a cam recess 12b that engages with the roller 5a on the sliding base 4a side with which the piston rod 7b is abutted, in this example. An end of a component holding tension spring 19 is locked to the locking pin 18. As shown in FIG. 1, the other end of the tension spring 19 is locked by a locking bolt 21 fixed to a spring locking plate 20 installed at the right end of the base 1 in the figure. The spring locking plate 20 is installed so as to extend parallel to the expansion and contraction direction of the piston rod 7b, and this has two slits 20a, 20b parallel to the substrate 1.
Has been drilled. The above-mentioned locking bolt 21 in the lower slit 20b, the locking bolt 22 in the upper slit 20a,
Each is fixed so as to be movable along each slit. As shown in FIG. 4, the upper locking bolt 22 has a tension spring 23 for urging the upper rotating lever 11 to rotate counterclockwise.
One end of is locked. The other end of this tension spring 23 is
It is locked to a locking bolt 24 which is planted on the tip end surface of the linking projection 11a of the upper rotary lever 11. The tension elastic forces of the two tension springs 19 and 23 described above can be adjusted by moving the fastening positions of the locking bolts 21 and 22.

FIG. 6 is a plan view showing a state in which the four holding claws 6 are maximally closed. As shown in the figure, on the end surface of the top plate 3,
In order to prevent damage due to collision between the holding claws 6, a slide base stopper 25 is provided. In this example, the piston rod
Two slide base stoppers 2 are provided on the end face opposite to the end face on which the slide base 4a with which 7b abuts and the end face adjacent to it are provided.
5,25 are installed respectively. That is, the slide bases 4a, 4c and 4b, 4d facing each other connected by the rotary levers 11, 12 are provided with slide base stoppers 25, 25, respectively, so that collision of the four holding claws 6 can be reliably prevented. Has become. Each slide base stopper 25
Bolt 25a which becomes contact part and L-shaped block 2 which supports this
It is composed of 5b and is attached to each end surface of the top plate 3 with bolts 25c. In this case, the bolt 25a can be rotated to move the head end surface serving as the stopper surface, and the stop positions of the slides 4c and 4d can be changed. This makes it possible to easily and optimally adjust the stop position of the new holding claw when the holding claw is replaced with an optimum one according to the type of electronic component to be positioned.

In FIG. 1, the positioning device configured as described above is attached to a predetermined position on the base 26 in the electronic component mounting device. In this case, a pair of positioning pins 27, 27 projecting from the rear surface of the base 1 of the positioning device are attached to the base 26.
The pin holes 26a, 26a formed at the predetermined positions are fitted into the pin holes 26a, 26a, respectively, and the mounting position of the positioning device is determined. Then, the fixing bolt 28 penetrating the base 1 at approximately the center between the positioning pins 27, 27 is inserted into the mounting hole 26b formed in the base 26 while the fixing hook 29 is screwed on the tip, The fixing bolt 28 is turned in the tightening direction to complete the mounting of the positioning device.

Next, the positioning operation of the electronic component by the positioning device of this example will be described.

In FIG. 1, before the electronic component to be positioned is placed on the tip of the suction nozzle 9, first, the air cylinder 7 is turned on and the holding claw 6 is fully opened. When the air cylinder 7 is turned on, the piston rod 7b extends, and the slide base 4a, which abuts on the tip of the piston rod 7b, slides along the end surface of the top plate 3 to the left side in the drawing. When the slide base 4a moves, the lower rotation lever 12 that engages with the roller 5a rotates in the clockwise direction against the tensile elastic force of the tension spring 19, and through the roller 5c engaged with the other end. The slide base 4c is slid synchronously to the right in the figure. In this case, since the slide bases 4a and 4c are engaged and connected to the cam recess levers 12b and 12b formed at both ends of the rotary lever 12 via the rollers 5a and 5c, respectively, the linear reciprocation of the slide bases 4a and 4c is performed. Conversion and transmission of the motion and the rotary motion of the rotary 12 lever are smoothly performed.

Further, in FIG. 4, as the rotary lever 12 rotates clockwise, the upper rotary lever 11 also integrally rotates in the same direction via the engaging pin 14. As a result, the sliding bases 4b, 4d engaged and connected to the cam recesses 11b, 11b at both ends of the rotary lever 11 via the rollers 5b, 5d are mutually attached along the end faces of the top plate 3 on which they are installed. Slide in the opposite direction. That is, along with the linear slide of the slide base 4a to the left in the figure, the other three slide bases 4b to 4d
Also slides linearly at the same time, and the holding claws 6 mounted on the slide bases 4a to 4d are separated from the central portion (the tip of the suction nozzle 9) of the top plate 3 that holds the electronic component to be positioned. The fully opened state as shown in Fig. 2 is obtained.

In FIG. 2, when the holding claw 6 is fully opened, an electronic component to be positioned is mounted on the tip of the suction nozzle 9 by a mounting head (not shown), and then a vacuum pump (not shown) starts suction and suction-holds.

Next, the air cylinder 7 is turned off. As a result, the driving force for pressing the slide base 4a to the left side in the figure disappears, so that the rotating levers 11 and 12 rotate counterclockwise (in FIG. 4) by the pulling elastic forces of the tension springs 23 and 19, respectively. . At this time, both rotary levers 11 and 12 are engaged with each other by the engagement pin 14 and integrally rotate in the counterclockwise direction. By rotating the rotary levers 11 and 12 in the counterclockwise direction, each of the slide bases 4a to 4d slides in the direction opposite to that when the pawls are opened, and the four holding pawls 6 are directed toward the center of the top plate 3. The electronic components that are close to each other and are suction-held are held in two directions orthogonal to each other. As a result, the position of the electronic component is corrected so that the center of the electronic component is located at the tip of the suction nozzle 9.

7 (a) to 7 (c) are plan views showing the operation of the holding claw 6'when positioning the QFP chip component Aq. In this case, two pairs of holding claws 6'a, 6'c and 6'b,
The type of 6'd is different, and one pair of holding claws 6'd
The length L ₁ of b, 6'd is greater than the length L _{2 of the} other pair of holding claws 6'a, 6'c. Therefore, when closing the holding claw 6 ',
As shown in FIG. 7 (b) to FIG. 7 (c), the larger holding claw pair 6'b, 6'd holds QFPAq first, and the rotation of the rotary lever 11 connecting them is stopped. To do. Even if the rotating lever 11 stops, the lower rotating lever 12 can rotate independently in the counterclockwise direction. The pair of holding claws 6'a and 6'c hold QFPAq. In this way, two pairs of holding claw pairs 6'a, 6'c and 6'having different sizes are provided.
Since the b, 6'd hold the object to be positioned with a time difference from the directions orthogonal to each other, it is possible to accurately position an electronic component such as a QFP in which lead terminals are extended in all directions and positioning is difficult.

It should be noted that the present invention should not be limited to the above specific embodiment, and various modifications can be made within the technical scope of the present invention. For example, the interlocking mechanism for moving the four claws closer to each other is not limited to the method of using the pair of rotary levers as in the above-described embodiment, but the holding claw is moved in parallel with the acting direction of the reciprocating linear driving force. Various link mechanisms that can be used are available.

[Effect of device]

As described above in detail, according to the present invention, drive transmission is achieved by configuring the interlocking mechanism so that the gripping claw can move closer to and away from the positioning target component in parallel with the reciprocating movement direction of the reciprocating linear driving means. In addition to being smoothed, the interlocking mechanism is simplified and the positioning device is miniaturized. As a result, it is possible to provide an electronic component positioning device that has a high degree of freedom of attachment and high positioning accuracy at low cost.

[Brief description of drawings]

FIG. 1 is an elevational view showing an electronic component positioning device as an embodiment of the present invention, FIG. 2 is a plan view showing the electronic component positioning device, and FIG. 3 is a sectional view taken along line III-III of FIG. , 4th
The drawing is a sectional view taken along the line IV-IV in FIG. 1, FIG. 5 is a bottom view of FIG. 3, and FIG. 6 is a plan view showing a fully closed state of the holding claw of the electronic component positioning device, and FIG. 7 (a). 7 to FIG. 7C are plan views showing the opening and closing operations of the holding claws, and FIG. 8 is a schematic sectional view showing a conventional electronic component positioning apparatus. 1 ... Base 3 ... Top plate 4a-4d, 84 ... Sliding base 5a-5d ... Roll 6,6'a, 6'c, 6'b, 6'd, 82 ... Clamping claw 7 …… Air cylinder 8 …… Suction nozzle 10 …… Center shaft 11,12 …… Rotary lever 14 …… Engage pin 19,23 …… Tension spring 20 …… Spring locking plate 26 …… Base (automatic electronic component mounting Equipment)

Claims (1)

[Scope of utility model registration request] Claims: 1. Four columns are erected on a base, and a substantially square top plate is fixedly mounted on the top of the columns, and four slides are slidable on four sides of the top plate. Installed on the base, vertically supported on the base, the upper end surface is a hollow shaft member serving as a positioning portion for mounting the electronic component to be positioned, and the top plate center for adsorbing and holding the electronic component in the positioning portion. Component suction means provided in
Four clamping claws provided so as to be capable of moving closer to and away from the base from four directions orthogonal to each other with respect to the positioning portion, and a pair of upper and lower rotating levers are rotatably externally inserted to the shaft member, A linking protrusion is formed in the center of the upper rotary lever, and a linking pin erected on the lower rotary lever is engaged with the linking protrusion in an orthogonal posture, and U is attached to each end of both rotary levers. Forming a V-shaped cam concave portion, and
The interlocking mechanism that allows the rollers provided at the lower part of the sliding part to move in synchronously to move the four holding claws, and the locking bolts are planted in the vicinity of the cam recesses, respectively Locking bolts are respectively planted on the tip side from the roller position, and are stretched between the four sets of locking bolts so that the rotary levers and the rollers are constantly in contact with each other, and the clamping claws are Biasing means for urging in a direction approaching the positioning portion, and reciprocating linear driving means for pushing one of the sandwiching claws in a direction parallel to the base in a direction away from the positioning portion against the biasing means. And a locking pin is provided upright in the vicinity of the cam recess engaged with the roller on the slide base on which the reciprocating linear drive means is abutted on the lower surface of the lower rotation lever, and one end of the component holding tension spring is attached. Lock the other end with the locking bolt fixed to the spring locking plate installed at the end of the base. Electronic parts positioning apparatus according to claim Rukoto.