JPH091424A - Bulk cassette - Google Patents

Abstract

PURPOSE: To prevent a part supply miss in supplying a tip part to a printed circuit board by a part mounting device. CONSTITUTION: In a bulk cassette 1 for supplying a tip part to a part mounting device, being supplied a bulked tip part, and mounting the tip part on a printed circuit board; a part carrying tape 12, moving from a part inlet part to a part supply part, is provided on a part carrying path 7 being extended from the part inlet part to a part sypply part 8 of the part mounting device.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a novel bulk cassette. More specifically, the present invention aims to provide a novel bulk cassette that prevents component supply errors when the component mounting apparatus supplies chip components to a printed circuit board.

[0002]

2. Description of the Related Art A component mounting apparatus for mounting a chip component on a printed circuit board is known. This will be briefly described with reference to FIGS. 11 to 14.

The component mounting device a is provided with a component supply device b for supplying a chip component (not shown) in a bulked state, that is, in an unloaded state, in a substantially central portion. The component supply device b is provided with a moving base c, and a large number of bulk cassettes d, d, ...
Are arranged in the moving direction (see FIG. 11).

The bulk cassette d is known, and an engaging portion (not shown) at its front end is engaged with the front end of the moving base c, and a clamp pawl e provided at its rear end is operated by a clamp lever f. Is attached to the moving base c by engaging with the rear end of the moving base c.

The bulk case g has a thin box shape, and an opening (not shown) is formed in the front end surface of the bulk case g, and the opening is opened and closed by a shutter (not shown). A large number of chip parts are stored in the bulk case g.

The bulk case g is attached to the bulk case mounting portion h of the bulk cassette d, and the shutter is slid to open the opening. In this way, the bulk case g is set in the bulk cassette d (see FIG. 13).

The positive pressure air supply hole i is opened at a position closer to the front of the upper end surface of the bulk cassette d, and the positive pressure air flow passage j extends from the positive pressure air supply hole i toward the inside of the bulk cassette d. Are formed. Further, the tip of the positive pressure air flow passage j is branched into two, and one of them is a nozzle 1 for stirring a component which opens toward the component inlet k side.
, And the other is connected to a component chute nozzle n that is open in the component conveying path m toward the side opposite to the component inlet k side (see FIG. 14).

The chip parts are taken out from the bulk case g as follows.

When the shutter of the bulk case g is slid to open the opening, the chip parts housed in the bulk case g reach the part entrance k provided in the frame of the bulk cassette d by its own weight. .

Next, when the feed lever o provided on the frame of the bulk cassette d is pressed by a pressing lever (not shown), positive pressure air is supplied to the positive pressure air supply hole i from a positive pressure air supply device (not shown). The positive pressure air is jetted from the above two nozzles, that is, the component stirring nozzle 1 and the component chute nozzle n, through the positive pressure air passage j.

The positive pressure air jetted from the component agitation nozzle l blows up the chip components that have solidified in the vicinity of the component inlet portion k, and falls by its own weight to the vicinity of the component inlet portion k, one of which is the component. It falls from the inlet part k into the component conveyance path m. The chip components dropped in the component transport path m are sent to the component supply section p by the positive pressure air jetted from the component chute nozzle n.

When the chip component sent to the component supply section p is sucked by the suction nozzle q and the feed lever o is pressed again by the pressing lever, positive pressure air is supplied from the positive pressure air supply device. The operation of supplying the next chip component to the hole i and sending it to the component supply part p is performed intermittently.

[0013]

By the way, the chip component suction nozzles q, q, ... In the component supply section p described above.
-The adsorption position by must always be kept at a fixed position. This is because if the position where the chip component is picked up differs from one chip component to another, the chip component will be picked up wrongly, and the picking up rate of the component mounting apparatus a will decrease or the operating rate and productivity will be reduced due to a mounting mistake on the printed board. This is because the decline of In addition, there is a problem that the component mounting device a is stopped all the time when many suction errors occur.

However, in the conventional bulk cassette d, the positive pressure air jetted from the component chute nozzle n plays a role of sending the chip component to the component supply part p, and then loses its place to go to the bulk cassette d. It flows through the component conveyance path m formed inside and reaches the component supply section p. Then, the chip component already located in the component supply section p is pushed from the rear, which changes the position and the posture of the chip component pushed from the rear, and a chip component suction error occurs. was there.

[0015]

In order to solve the above-mentioned problems, the bulk cassette of the present invention supplies a component from a component inlet to a component conveying path extending from a component inlet to a component mounting device. It is provided with a component carrying tape that moves to the section.

[0016]

Therefore, in the bulk cassette of the present invention, since the chip components are not conveyed by the positive pressure air, the chip components located in the component supply section are not pushed from the rear by the air, and therefore Therefore, the position and orientation of the chip component in the component supply unit will not change.

[0017]

The details of the bulk cassette of the present invention will be described below with reference to the illustrated embodiments.

Required members are attached to a frame 2 as a cassette body of the bulk cassette 1.

A bulk case 4 is attached to a bulk case mounting portion 3 provided on the frame 2.

The bulk case 4 has a flat box shape,
An opening 4a is formed at its front end, and the opening 4a is opened and closed by a shutter (not shown).
In the bulk case 4 as described above, the chip components 5, 5, ... In a bulk state are housed and supplied. When the bulk case 4 is attached to the bulk cassette 1, the shutter is opened and the opening 4a is opened.

When the bulk case 4 is attached to the bulk cassette 1 as described above, the chip components 5, 5, ... Are supplied to the component inlet 6. A component transport path 7 extending from the component inlet 6 toward the front end of the bulk cassette 1 is formed, and the tip of the component transport path 7 serves as a component supply section 8.

The positive pressure air supply hole 9 is opened at a position near the front of the upper end surface of the frame 2, and the positive pressure air flow passage 10 extends from the positive pressure air supply hole 9 toward the lower part of the bulk cassette 1. Are formed. The tip of the positive pressure air flow passage 10 is connected to a component agitation nozzle 11 that opens toward the component inlet 6 (see FIG. 4).

Substantially the entire lower part of the component transport path 7 is a storage space 13 for storing the component transport tape 12. The component carrying tape 12 has an endless shape, and its cross-sectional shape is rectangular. Then, a lower part of the position from the front end to the rear end of the component transport path 7 is formed as a storage space 13, and the storage space 13 corresponds to the shape of the component transport tape 12 in the front-rear direction. It is formed as a long annular space.

The component carrying tape 12 is stored in the storage space 1
The support pulley 14 provided at the front end of the housing 3 and the driving roller 15 provided at the rear end of the housing space 13 are wound with a certain amount of tension so as to be movable in the housing space 13. Incidentally, the drive roller 15 is formed to be slightly elongated in the axial direction, and the component carrying tape 12 is provided on a portion of the drive roller 15 excluding the left end portion thereof, and the second end described later is provided on the left end portion thereof.
The drive belt of is wound.

Storage recesses 16, 16, ... Are regularly arrayed in the longitudinal direction of the component transfer tape 12 on the tape running surface of the component transfer tape 12.
The sizes of 6, ... Are made slightly larger than the sizes of the chip parts 5, 5 ,.
If the chip components 5, 5, ... Are stored in the storage units 16, 16 ,.
The size of 5, ... is completely accommodated.

In the bulk cassette 1, a feed lever 17 having a substantially V shape is rotatably supported on one side surface of the frame 2 with its substantially bent portion as a rotation fulcrum. Action piece 1 whose tip is semicircular from the side
8 is projected toward the front. Further, stoppers 19 and 19 projecting from the frame 2 are provided on both sides of the lower end of the feed lever 17, and the rotation range of the feed lever 17 is limited by the stoppers 19 and 19.

A ratchet wheel mounting shaft 20 is projected from the frame 2 at a position near the front where the action piece 18 of the feed lever 17 is provided, and a swing plate 21 is rotated on the ratchet wheel mounting shaft 20. A ratchet wheel 22 is rotatably supported outside the swing plate 21. And
The ratchet wheel 22 is made to rotate only in the counterclockwise direction by means not shown, and engaging grooves 23, 23, ... Are formed on the outer peripheral surface thereof.

The oscillating plate 21 has a substantially oval plate shape elongated in the front-rear direction, its front end is rotatably supported by the ratchet wheel mounting shaft 20, and its rear end is the feed lever. It is located at substantially the same position as the tip of the action piece 18 of 17. A ratchet plate mounting shaft 24 is projectingly provided at the rear end of the swing plate 21, and a ratchet plate 25 is rotatably supported by the ratchet plate mounting shaft 24.

The ratchet plate 25 has a central portion supported by the ratchet plate mounting shaft 24, and the engaging grooves 23, 23, ... Of the ratchet wheel 22 extend from the central portion.
A tapered ratchet pawl 26 that engages with is formed integrally with the central portion so as to project, and on the side of the anti-ratchet pawl 26, an actuated piece 27 having a semicircular tip portion integrally with the central portion is formed.
Is protruding.

A stop pin 28, which is located on the lower side of the rocking plate 21 and slightly behind the ratchet wheel 22, has a frame 2
The oscillating plate 21 is arranged so as not to rotate in the clockwise direction from the position where the lower edge of the rear end of the oscillating plate 21 abuts the stop pin 28.

A mounting hole (not shown) is formed in the frame 2 in the front of the portion where the ratchet wheel 22 is located and slightly below the ratchet wheel 22. The mounting hole is formed in the frame 2 and is to be described later as a second drive belt. Is communicated with a rear end portion of a storage portion (not shown) in which is stored.

The connecting pulley attachment shaft 29 is provided so as to project from the rear end portion of one side surface that forms the storage portion formed in the frame 2, and the substantially left half portion thereof is projected to the outside of the frame 2, and The remaining part is located inside the storage part. The connecting pulley 30 is rotatably supported by the connecting pulley mounting shaft 29, so that the substantially left half of the connecting pulley 30 is projected from the frame 2, and the remaining portion is located in the storage portion. ing. The first drive belt 3 having an endless shape on the ratchet wheel 22 and the portion of the connecting pulley 30 protruding from the frame 2.
When 1 is wound with a certain amount of tension, the ratchet wheel 22 rotates and the first drive belt 31 is sent, the connecting pulley 30 rotates.

A front end of the storage portion (not shown) formed in the frame 2 is communicated with a rear end of the storage space 13, and is located in the storage portion of the connecting pulley 30 and in front thereof. An endless second drive belt 32 is wound around the left end of the drive roller 15 with a certain amount of tension, and when the connection pulley 30 rotates and the second drive belt 32 is fed, the drive roller 15 Will rotate. The second drive belt 32 is wound on the part of the drive roller 15 where the component carrying tape 12 is not wound, that is, on the left end so as to be adjacent to the component carrying tape 12. .

When the ratchet wheel 22 is rotated by the drive mechanism 33 having the feed lever 17, the stopper 19, the swing plate 21, the ratchet plate 25 and the stop pin 28, the rotation of the ratchet wheel 22 causes the first drive belt to rotate. 31 is sent to rotate the connection pulley 30, and the rotation of the connection pulley 30 causes the second drive belt 3 to rotate.
2 is sent and the drive roller 15 rotates. Then, the component carrying tape 12 wound around the driving roller 15 and the support pulley 14 is fed.

The operation of the drive mechanism 33 for rotating the ratchet wheel 22 will be described below (see FIGS. 5 to 10).

When the feed lever 17 is pressed by a pressing lever of a component mounting device (not shown), the feed lever 17 is rotated counterclockwise about its rotation axis. Then, when the feed lever 17 is rotated, the lower edge of the action piece 18 is moved to the operated piece 2 of the ratchet plate 25.
Abut the upper edge of 7. At this time, the lower edge of the oscillating plate 21 is in contact with the stop pin 28 and is stationary, and the tip of the ratchet pawl 26 of the ratchet plate 25 has the engaging grooves 23, 23, ... Of the ratchet wheel 22. It is engaged with 123 of them. Incidentally, the ratchet pawl 26 leans slightly to the right of the center of rotation of the ratchet wheel 22 when viewed from the left side, and engages with the engagement groove 2 slightly.
3 (see FIG. 5).

When the feed lever 17 is further rotated counterclockwise, the action piece 18 of the feed lever 17 moves downward, and the actuated piece 27 of the ratchet plate 25, which is in contact with the action piece 18, moves the action piece 18. The ratchet plate 25 is pressed from above by 18 and rotates clockwise with the ratchet plate mounting shaft 24 as a rotation fulcrum. Then, the engagement of the ratchet pawl 26 with the engagement groove 23 is released, and the ratchet pawl 26 and the ratchet wheel 22 are separated from each other without rotating the ratchet wheel 22 (see FIG. 6).

When the feed lever 17 is further rotated counterclockwise, the ratchet plate 25 is further rotated clockwise, so that the lower edge of the action piece 18 of the feed lever 17 and the ratchet plate 25 are acted upon. It moves so as to wander while contacting the upper edge of the piece 27, and then the action piece 18 of the feed lever 17 and the ratchet plate 25.
The operated piece 27 is separated from the operated piece 27. When the ratchet plate 25 is separated, the center of gravity of the ratchet plate 25 is located slightly forward of the center of rotation of the ratchet plate 25. Therefore, the ratchet plate 25 rotates counterclockwise due to its own weight and the feed lever 17 operates. The piece 18 returns to the state before pressing the actuated piece 27 of the ratchet plate 25, that is, the ratchet pawl 26 of the ratchet plate 25 engages with the engagement groove 23 of the ratchet wheel 22 again (see FIG. 7).

When the feed lever 17 is rotated counterclockwise to a certain range, the stoppers 19 and 1 are provided.
The rotation is blocked by one of the nineteen. And
This time, the feed lever 17 will be rotated clockwise.

The rotation of the feed lever 17 in the clockwise direction is performed by the lower end of the feed lever 17 and the bulk cassette 1.
This is performed by the pulling force of a tension coil spring (not shown) stretched between the frame 2 and the frame 2.

The action piece 18 of the feed lever 17 rotated clockwise contacts the lower edge of the action piece 27 of the ratchet plate 25. And ratchet plate 2
The actuated piece 27 of No. 5 receives an upward pressing force from the actuating piece 18 of the feed lever 17, whereby the ratchet plate 25 is urged to rotate in the counterclockwise direction. However, as described above, the ratchet pawl 26 engages with the engagement groove 23 so as to lean slightly to the right of the center of rotation of the ratchet wheel 22 when viewed from the side, so that the ratchet plate 25 is counterclockwise. The engagement is not released even when it is rotated in the rotating direction. Further, when the operated piece 27 of the ratchet plate 25 is pressed upward by the operating piece 18 of the feed lever 17, the ratchet wheel 22 is prevented from rotating in the clockwise direction as described above. The ratchet plate mounting shaft 24 is not rotated in the counterclockwise direction about the rotation center, and the swing plate 21, the ratchet plate 25, and the ratchet wheel 22 are integrated,
These rotate counterclockwise with the ratchet wheel mounting shaft 20 as a fulcrum of rotation (see FIG. 8).

When the feed lever 17 is further rotated in the clockwise direction, the upper edge of the action piece 18 of the feed lever 17 and the lower edge of the action piece 27 of the ratchet plate 25 move so as to wander. , Then feed lever 17
The operating piece 18 and the operated piece 27 are separated from each other (see FIG. 9).

When the operating piece 18 of the feed lever 17 and the operated piece 27 of the ratchet plate 25 are separated from each other, the swing plate 21 together with the ratchet plate 25 uses the ratchet wheel mounting shaft 20 as a fulcrum for rotation by its own weight. After rotating in the clockwise direction, the swing plate 21 comes into contact with the stop pin 28 to prevent the rotation. At the time of such rotation, the engagement of the ratchet pawl 26 of the ratchet plate 25 with the engagement groove 23 is released, and the tip of the ratchet plate 26 slides on the outer peripheral surface of the ratchet wheel 22 to engage with the engagement groove 23. It engages with one of the engaging grooves 23, 23, ... Positioned below the mating groove 23. Therefore, the swing plate 21 and the ratchet plate 25 return to the same position as the position before the feed lever 17 was rotated.

The feed lever 17 is one stopper 1
The clockwise rotation is blocked by 9 (see FIG. 10).

Then, the feed lever 17 is pressed again by the pressing lever of the component mounting device, and the feed lever 1
When 7 is rotated in the counterclockwise direction, the lower edge of the action piece 18 contacts the upper edge of the actuated piece 27 of the ratchet plate 25 (see FIG. 5), and the drive mechanism 33 is repeatedly operated. As a result, the ratchet wheel 22 intermittently repeatedly rotates in the counterclockwise direction.

Thus, one reciprocating movement of the feed lever 17 causes the ratchet wheel 22 to intermittently rotate counterclockwise by a predetermined angle.

Then, the rotational force of the ratchet wheel 22 due to the operation of the drive mechanism 33 is transmitted to the component transport tape 12 via the first drive belt 31 and the second drive belt 32 as described above, and the component transport tape 12 is It moves intermittently by a predetermined distance from the component inlet section 6 side to the component supply section 8 side.

Next, the process in which the chip components 5, 5, ... Are conveyed from the component inlet 6 to the component supply unit 8 will be described below.

When the pressing lever of the component mounting device (not shown) presses the feed lever 17, positive pressure air is supplied from the positive pressure air supply device (not shown) to the positive pressure air supply hole 9 in response to the pressing. The positive pressure air is jetted from the component stirring nozzle 11 through the positive pressure air flow passage 10.

The chip components 5, 5, ..., which had been solidified in the vicinity of the component inlet 6, are blown up by the positive pressure air jetted from the component stirring nozzle 11, and fall into the vicinity of the component inlet 6 by its own weight. One of them falls from the component inlet 6 into the component transport path 7.

The component transport tape 12 is provided in the storage space 13 of the component transport path 7 as described above, and the dropped chip components 5 are stored in the storage recesses 16, 16, ... Formed in the component transport tape 12. 16 of them.

Then, when the feed lever 17 is rotated, the ratchet wheel 22 is rotated as described above, and the chip component 5 is moved to the component supply unit 8 side by the movement of the component carrying tape 12.

However, the rotation of the feed lever 17 and the supply of positive pressure air from the positive pressure air supply device to the positive pressure air supply hole 9 in response to the rotation of the feed lever 17 cause the chip parts 5, 5 to be successively inserted. , ... is the component transport tape 1
.., and the component transport tape 12 is moved from the component inlet 6 to the component supply unit 8 side.

The chip components 5, 5, ... Having reached the component supply unit 8 are sucked by a suction nozzle (not shown) of the component mounting apparatus and mounted on a printed circuit board (not shown).

It should be noted that the positive pressure air is supplied from the positive pressure air supply device to the positive pressure air supply hole 9 once for each reciprocating movement of the feed lever 17.

In the present embodiment, however, the chip parts 5, 5, ... Are carried by the part carrying tape 12 provided in the storage space 13 of the part carrying path 7, which is conventionally required. No need for positive pressure air for transporting the chip components 5, 5, ... To the component supply unit 8, and there is a conventional component chute nozzle n and a positive pressure air flow passage j for the component chute. It is not necessary to provide a passage leading to the nozzle n. Therefore, the amount of positive pressure air required in this embodiment is only the positive pressure air jetted from the component agitation nozzle 11, which is about half the amount of the conventional positive pressure air.

The chip parts 5, 5, ... Are housed one by one in the housing recesses 16, 16, .. 8 conveyed chip parts 5, 5, ...
The position and orientation of the chip components will not change, and supply errors of the chip components 5, 5, ... Will not occur.

Furthermore, since the component transport tape 12 is moved by the intermittent rotation of the ratchet wheel 22, when the component transport tape 12 moves intermittently and the component transport tape 12 does not move, component mounting not shown is carried out. The chip nozzles 5, 5, ... Can be sucked by the suction nozzle of the apparatus, and this also allows the chip components 5, 5 ,.
・ It is possible to prevent supply mistakes.

[0059]

As is clear from the above description, the bulk cassette of the present invention supplies the chip component to the component mounting apparatus for supplying the chip component in bulk and mounting the chip component on the printed circuit board. The bulk cassette is characterized in that a component transfer tape that moves from the component inlet to the component supply unit is provided in a component transport path extending from the component inlet to the component supply unit for the component mounting apparatus.

Therefore, in the bulk cassette of the present invention, since the chip components are not conveyed by the positive pressure air, the chip components located in the component supply section are not pushed from the rear by the air, and The position and orientation of the chip parts in the supply unit will not change,
Therefore, there is no mistake in picking up chip parts. This improves the operating rate and productivity of the component mounting device,
The problem that the component mounting apparatus is stopped due to a chip component suction error is also solved.

Further, the positive pressure air required is only the positive pressure air jetted from the component stirring nozzle, which is about half the amount of the conventional positive pressure air, which contributes to cost reduction. I can.

It should be noted that the shapes and structures of the respective parts shown in the above-mentioned embodiments are merely examples of the embodiment when carrying out the present invention, and the technical scope of the present invention is limited thereby. It should not be construed in a conventional way.

[Brief description of the drawings]

1 shows an example of an embodiment of the bulk cassette of the present invention together with FIGS. 2 to 10, and is a schematic perspective view.

FIG. 2 is a schematic cross-sectional view showing an enlarged main part with a part cut away.

FIG. 3 is an enlarged perspective view showing a part of the component carrying tape.

FIG. 4 is a cross-sectional view showing an enlarged main part with a part cut away.

FIG. 5 is a view showing a drive mechanism of the component carrying tape together with FIGS. 6 to 10, and shows a state in which the feed lever is rotated in the counterclockwise direction and the operating piece is in contact with the ratchet plate. It is a side view.

FIG. 6 is a side view showing a state where the feed lever is further rotated counterclockwise from the state shown in FIG.

FIG. 7 is a side view showing a state in which the feed lever is further rotated counterclockwise from the state shown in FIG. 6 and is rotated to the limit of the rotation range in the counterclockwise direction.

FIG. 8 is a side view showing a state where the feed lever is rotated clockwise from the state shown in FIG. 7 and the action piece thereof is in contact with the ratchet plate.

9 is a side view showing a state where the feed lever is further rotated clockwise from the state shown in FIG.

FIG. 10 is a side view showing a state in which the feed lever is further rotated in the clockwise direction from the state shown in FIG. 9 and is rotated to the limit of the rotation range in the clockwise direction.

FIG. 11 is a schematic perspective view of a component mounting device together with FIG. 12, and is a schematic perspective view.

FIG. 12 is a schematic side view.

FIG. 13 is a view showing a conventional bulk cassette together with FIG. 14, and is a schematic perspective view.

FIG. 14 is a partial sectional view showing a partially cutaway and enlarged view.

[Explanation of symbols]

 1 Bulk Cassette 2 Frame 5 Chip Component 6 Component Inlet 7 Component Transfer Path 8 Component Supply Section 12 Component Transfer Tape 16 Storage Recess 17 Feed Lever 22 Ratchet Wheel

Claims (4)

[Claims] 1. A bulk cassette for supplying the chip component to a component mounting device for mounting the chip component on a printed circuit board by supplying the bulked chip component, the component cassette up to a component supply unit for the component mounting device. A bulk cassette characterized in that a component transport tape that moves from a component inlet to a component supply unit is provided on a component transport path extended from the inlet. 2. The bulk cassette according to claim 1, further comprising storage recesses in which the chip components are regularly stored in the longitudinal direction of the component transport tape. 3. A ratchet wheel which is rotated by rotation of a feed lever is rotatably supported by a frame of a bulk cassette, and the component carrying tape is moved by rotation of the ratchet wheel. 1. The bulk cassette according to 1. 4. A ratchet wheel that is rotated by the rotation of a feed lever is rotatably supported by a frame of a bulk cassette, and the component transport tape is moved by the rotation of the ratchet wheel. The bulk cassette according to 2.