JPH0314076Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is a work positioner for chip mounters,
In particular, the present invention relates to a technique that is effective when applied to a work positioner of a mounting head of a chip mounter for mounting chip-shaped electronic components on a board.

[Conventional technology]

This type of work positioner is equipped with a work suction head that can move up and down, that is, a bit, which is capable of vacuum suction on a work such as a chip-shaped electronic component such as a semiconductor integrated circuit (IC), and the work is clamped near the bit. Some have a structure that moves up and down between the release position and the release position.

This workpiece positioner is constructed so that two pairs of positioning chips capable of horizontal reciprocating motion in two orthogonal directions are equalized and moved to the center of the bit, thereby positioning the workpiece to the center of the bit.

[Problem that the invention attempts to solve]

However, in the case of the work positioner,
There is a problem in that the positioning accuracy of the workpiece by the positioner chip decreases due to angle and positional deviations. Therefore, it is difficult to assemble the work positioner, and it takes time to make adjustments during assembly. Moreover, the work positioner has a large number of parts, has a complicated structure, and is often difficult to process.
In addition to being expensive, it also has the disadvantage of poor maintainability.

In addition, for example, since there are many types of chip-type electronic components, it is required to replace the positioner chip depending on the type, but since it is necessary to replace each small positioner chip individually,
In order to replace each positioner chip individually, four operations are required, which is not only difficult, but also disadvantageous in moving to automatic replacement.

One purpose of the present invention is to provide a workpiece positioner that can position a workpiece with high precision.

Another object of the present invention is to provide a workpiece positioner that allows the positioner mechanism section to be easily replaced from the positioner drive section depending on the type of workpiece, and is compatible with automatic replacement.

[Means for solving problems]

The work positioner of the chip mounter of the present invention consists of a positioner mechanism section for positioning a chip-shaped workpiece and a positioner drive section for driving this positioner mechanism section,
The positioner mechanism section includes a first guide plate, at least one pair of guide grooves formed through the first guide plate so as to face each other in a linear direction, and a first guide groove along each of the at least one pair of guide grooves. A reciprocating positioner block,
A connecting means inserted into the guide groove so as to be movable along the guide groove is connected to each of the positioner blocks across the first guide plate, and is opened and closed by its reciprocating movement, so that the chips can be inserted between each other. At least one pair of positioner chips for clamping or releasing a shaped workpiece, two pairs of levers that are swingably connected to each other by a pair of slide bars, and by energizing the levers, the positioner chips are moved by equal amounts. The positioner drive unit includes a plurality of guide posts, and a second guide plate provided at the lower end of the guide posts and capable of vertically reciprocating movement. , a compression spring wound around the guide post to bias the second guide plate downward;
a slide block supported by the second guide plate so as to be oscillated by the vertical movement of the guide plate; It is characterized by having a sliding roller pin.

[Effect]

According to the above-described means, by moving the positioner block and the positioner chip along the guide groove of the guide plate, the workpiece can be positioned with high precision by the positioner chip.

〔Example〕

FIG. 1 is an exploded perspective view showing the components of a work positioner of a chip mounter according to an embodiment of the present invention, and FIGS. 2 a and 2 b show the positioner mechanism of the work positioner of a chip mounter according to the present invention when the chip is open. A schematic plan view of the main parts and a schematic partial sectional view of the work positioner,
3a and 3b are a schematic plan view of a main part of the positioner mechanism section and a schematic partial sectional view of the work positioner, respectively, with the positioner chip in the closed state.

The work positioner of the chip mounter of this embodiment is broadly divided into a positioner mechanism section A for positioning a work such as a chip-shaped electronic component, and a positioner drive section B for driving the positioner mechanism section A.

The positioner mechanism part A has a circular guide plate 1, and a pair of guide grooves 2, 2 are formed in the radial direction of the guide plate 1 in a straight line orthogonal to each other in the thickness direction (vertical direction). has been done. Positioner blocks 3, 3 are inserted into each guide groove 2, 2 from above with a protrusion on the lower side thereof. And positioner block 3,3
The guide plate 1 is sandwiched between the lower positioner chips 4, 4 of the guide plate 1 from both upper and lower sides, and the positioner blocks 3, 3 and the positioner chips 4, 4 are attached to and detached from each other by set screws 5, 5. possible to be connected.

Each pair of positioning chips 4, 4 is formed into a substantially I-shape and the other into a substantially T-shape, and are combined so that their inner ends define a workpiece positioning space in a closed state.

The guide plate 1 further has a hole 8 through which the clamp block 6 is inserted and fastened with the nut 7, a hole 11 through which the guide block 9 is inserted and fastened with the nut 10, and a hole 13 through which the clamper 12 is inserted and fastened with the nut 13. A hole 14 for fastening, and a center hole 16 for inserting a vacuum suction head (ie, bit) 15 (see FIGS. 2b and 3b), etc. are formed.

A clamp spring 17 is attached to the clamp block 6, and a biasing spring 18 is attached to one guide block 9.

Also, two pairs of levers, namely a pair of levers 1
9, 19 and the other pair of levers 20, 20,
Each pair of levers 19 and 20 are connected to each other so as to be able to swing, and each pair of levers 19 and 20 is connected to a pair of slide bars 2.
1, they are interlockably connected.

Above the slide bar 21 are rollers 22, 2.
3 stands out. These rollers 22, 23
penetrates the elongated hole 25 of the guide plate 24 and projects upward.

This guide plate 24 is connected above the guide plate 1 via the clamper 12 by screws 26, and serves as a cover.

Next, the positioner drive section B of this embodiment will be explained. The positioner drive section B has a structure that can be easily attached to and detached from the positioner mechanism section A using a clamp pin 27 and a nut 28 in a one-touch manner.

That is, the guide plate 29 of the positioner drive section B is held between the lower clamp pin 27 and the upper nut 28, and the clamp pin 27 passes through the guide plate 24 of the positioner mechanism section A and is attached to the guide plate 24. The clamp spring 17 extends downward and is fastened to the positioner mechanism A by the clamp spring 17. In addition, clamp pin 2
A guide pin 30 is inserted through the lower side of 7.

The lower ends of four guide posts 31, 31 for supporting columns are inserted into the guide plate 29 of the positioner drive unit B, and the upper ends of the guide posts 31, 31 are screwed into and fixed to a mounting frame 32.

Compression springs 33, 33 are wound around the outer periphery of each of the guide posts 31, 31, and the guide plates 2
9 is biased downward.

Therefore, the guide plate 29 is urged downward by the compression spring 33 as the vacuum suction head 15 moves downward by a driving means (not shown), and the compression spring 3 is urged downward as the vacuum suction head 15 moves upward. is pulled upward against the urging force of. Because guide plate 29
The vacuum suction head 15 is attached to the guide plate 29.
This is because it moves upward together with the vacuum suction head 15 via the clamp pin 27 and nut 28 that are connected to the vacuum suction head 15.

A pin 35 is inserted into a pair of support pins 34 provided on the upper surface side of the guide plate 29, and the pin 35 is inserted into a slide block 36 between the support pins 34 to move the slide block 36 around the pin 35. It is supported so that it can swing. There are three support protrusions 36 on the sides of the slide block 36.
a, 36b, and 36c are protruding. This support protrusion engages the fork at the tip of the central support protrusion 36b between the two flange parts 37a of the roller pin 37, and inserts each end of the roller pin 37 into the holes of the support protrusions 36a and 36c. This allows the roller pin 37 to slide horizontally on the guide plate 29.

During this sliding operation, the roller pin 37
The roller 2 protrudes upward from the slide bar 21 of the positioner mechanism section A through the elongated hole 25 of the guide plate 24 and the hole of the guide plate 29.
2 and 23 and the vacuum suction head 15 is lowered, the two pairs of levers 19 and 20 are opened via the slide bar 21.
Two pairs of positioner chips 4 are forcibly opened. That is, in this state, as shown in FIGS. 2a and 2b, the roller pin 37 pushes the rollers 22 and 23, and the slide bar 21 moves to the position shown in FIG. Lever 1
9 and 20 are operated to open. As mentioned above, these two pairs of levers 19, 19 and 20,
20 are connected to each other so as to be swingable, and each pair of levers 19 and 20 are connected to each other by a pair of slide bars 21 so that they can move together.

On the other hand, as the vacuum suction head 15 rises, the biasing spring 18, which engages with the levers 19 and 20 at its lower side, biases the levers 19 and 20 in the centripetal direction, that is, in the closing direction. The biasing force of the biasing spring 8 in the centripetal direction is a force for biasing the lever 19 in the closing direction and causing the positioning chip 4, the lever 20, and the slide bar 21 to operate together with the lever 19 in a closing operation.
As a result, the levers 19, 20 and slide bar 21 move from the position shown in FIG. 2a to the position shown in FIG. This equalizing operation of the positioner chip 4 is performed by the positioner chip 4, levers 19, 20, and slide bar 21 as shown in FIGS. 2a and 3a.
It is obtained by the mutual interlocking relationship of.

Thereby, the two pairs of positioner chips 4, 4 push the workpiece W with their tips and position the workpiece W from four directions.

Note that the reference numeral 38 (see FIGS. 2b and 3b) is a guide pin.

Next, the operation of this embodiment will be explained with reference to FIGS. 2 and 3.

In FIGS. 2a and 2b, the vacuum suction head 15 is lowered,
Indicates a case where the positioning chip 4 is in an open state,
3a and 3b show the case where the vacuum suction head 15 is raised and the positioner tip 4 is in the closed state.

That is, when a workpiece such as a chip-shaped electronic component is supplied to a predetermined position by a component supply mechanism of a chip mounter (not shown), the vacuum suction head 15
is lowered by a drive means (not shown).

At that time, the guide plate 29 is compressed by the compression spring 33,
It is urged downward at 33. Along with this, the slide block 36 supported by the support pins 34 and 35 on the guide plate 29 rotates around the pin 35, and the roller pin 37 supported by the slide block 36 moves against the upper surface of the guide plate 29. Slide horizontally along the

Along with this sliding movement of the roller pin 37,
The rollers 22 and 23 protruding upward from the slide bar 21 of the positioner mechanism section A are connected to the roller pin 37.
It is pushed and moved. As a result, the vacuum suction head 15
is lowered, the two pairs of levers 19 and 20 are opened by the operation of the slide bar 21, the positioner block 3 is moved linearly outward along the guide groove 2, and the positioner tip 4 is moved by the positioner drive unit. Due to the action of B, they are forced to open in the direction of moving away from each other (see Figures 2a and b).

As shown in FIG. 2b, the vacuum suction head 15 has a vacuum passage 15A formed axially through the vacuum suction head 15 from the lower end to the upper end.
A workpiece (W) such as a chip-shaped electronic component is vacuum-sucked at the lower end surface by the vacuum suction force applied through the vacuum suction force. Therefore, a vacuum source such as a vacuum pump (not shown) is connected to the upper end of the vacuum suction head 15.

Thereafter, as the vacuum suction head 15 rises, the levers 19 and 2 are biased in the centripetal direction by the spring 18 of the positioner mechanism A.
0 is biased in the closing direction, and the positioner block 3 moves to close along the guide groove 2, the two pairs of positioner chips 4 are equalized by the same amount and move toward the center, and the vacuum suction head 15 The workpiece W is attracted to the tip (lower end) of
As shown in FIG. 3a, the vacuum suction head 15 is accurately positioned at the center of the vacuum suction head 15 by pushing and positioning it with the tips of two pairs of positioning chips 4, 4 from all sides.

Furthermore, when it is desired to mount a workpiece on, for example, an IC board, the vacuum suction head 15 is lowered, the positioner chip 4 is forcibly opened as described above by the action from the positioner drive unit B, and the workpiece is vacuumed as described above. Since the tip of the suction head 15 is precisely positioned at a predetermined position, the workpiece is mounted on the substrate at a predetermined position with high precision.

In addition, in this embodiment, the positioner mechanism section A
If you want to remove it from positioner drive unit B for replacement, repair, or maintenance,
Clamp spring 17 locked to clamp pin 27
It can be easily attached and detached by simply removing the .

Note that the present invention is not limited to the above-mentioned embodiments, and various other modifications are possible, and these modifications are also included in the present invention.

[Effect of idea]

According to the work positioner for a chip mounter of the present invention, it is comprised of a positioner mechanism section for positioning a chip-shaped workpiece, and a positioner drive section for driving this positioner mechanism section, and the positioner mechanism section has a first a guide plate; at least a pair of guide grooves formed through the first guide plate so as to face each other in a linear direction; a positioner block that reciprocates along each of the at least one pair of guide grooves; A connecting means inserted into a guide groove so as to be movable along the guide groove is connected to each of the positioner blocks across the first guide plate, and is opened and closed by its reciprocating movement to form a chip shape between each other. at least one pair of positioner chips for clamping or releasing a workpiece; two pairs of levers that are swingably connected to each other by a pair of slide bars; and by energizing the levers, the positioner chips are moved by equal amounts to move the positioner chips to the center. The positioner drive unit includes a plurality of guide posts, a second guide plate provided at the lower end of the guide posts and capable of vertically reciprocating movement; a compression spring wound around the guide post to bias the second guide plate downward;
a slide block supported by the second guide plate so as to be oscillated by the vertical movement of the guide plate; By having a sliding roller pin, the positioner block and the positioner chip can move smoothly along the guide groove of the guide plate, and the workpiece can be positioned with high precision.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the components of a work positioner of a chip mounter according to an embodiment of the present invention, and FIGS. 2 a and 2 b show the positioner mechanism of the work positioner of a chip mounter according to the present invention when the chip is open. A schematic plan view of the main parts and a schematic partial sectional view of the work positioner,
3a and 3b are a schematic plan view of a main part of the positioner mechanism section and a schematic partial sectional view of the work positioner, respectively, with the positioner chip in the closed state. A...Positioner mechanism section, B...Positioner drive section, 1...Guide plate, 2...Guide groove,
3... Positioner block, 4... Positioner chip, 5... Set screw, 6... Clamp block,
7... Nut, 8... Hole, 9... Guide block, 10... Nut, 11... Hole, 12... Clamper, 13... Nut, 14... Hole, 15... Vacuum suction head, 15A... ... Vacuum passage, 16 ... Center hole, 17 ... Clamp spring, 18 ... Biasing spring, 19, 20 ... Lever, 21 ... Slide bar, 22, 23 ... Roller, 24 ... Guide plate, 25 ...Elongated hole, 26...Screw, 27...Clamp pin, 28...Nut, 29...Guide plate, 30...Guide pin, 31...Guide post, 32...Mounting frame, 33...Compression spring , 34
... Support pin, 35 ... Pin, 36 ... Slide block, 36a, 36b, 36c ... Support projection, 37 ... Roller pin, 37a ... Flange portion, 38 ... Guide pin, W ... Work.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a positioner mechanism section for positioning a chip-shaped workpiece and a positioner drive section for driving this positioner mechanism section, the positioner mechanism section is connected to a first guide a plate, at least a pair of guide grooves formed through the first guide plate so as to face each other in a linear direction, a positioner block that reciprocates along each of the at least one pair of guide grooves, and the guide. A connecting means inserted into the groove so as to be movable along the guide groove is connected to each of the positioner blocks across the first guide plate, and is opened and closed by the reciprocating movement of the connecting means to form a chip-shaped joint between them. At least one pair of positioner chips that clamp or release a workpiece, two pairs of levers that are swingably connected to each other by a pair of slide bars, and by energizing the levers, the positioner chips are moved by equal amounts to the center position. The positioner drive section includes a plurality of guide posts, a second guide plate provided at the lower end of the guide posts and capable of vertically reciprocating movement, A compression spring is wound around the guide post so as to bias the second guide plate downward, and a slide block is supported by the second guide plate so as to swing as the second guide plate moves up and down. and a roller pin that is attached to the slide block and slides horizontally on the second guide plate as the slide block swings. (2) Utility model registration claim 1 characterized in that two pairs of the positioner chips are provided.
Work positioner for the chip mounter described in section. (3) The work positioner for a chip mounter according to claim 2, wherein the roller pin pushes the slide bar by its sliding action and opens the positioner chip. (4) Utility model registration claim 1, characterized in that the positioner mechanism section is removably connected to the positioner drive section by a connecting means.
Work positioner for the chip mounter described in section. (5) The work positioner for a chip mounter according to claim 4, wherein the connecting means comprises a clamp pin and a clamp spring that is engaged with the clamp pin.