JP3487733B2 - Component supply device in electronic component mounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component supply device in a multifunctional electronic component mounting device for supplying electronic components via a pallet.

[0002]

2. Description of the Related Art Conventionally, as this type of component supply device, a large number of electronic components are arranged in an array on a tray, and one or a plurality of such trays are mounted on a pallet. By facing the pickup position,
Directly or indirectly to the main body of the device electronic components
No. 257896) is known. Such a component supply device mainly supplies a relatively large electronic component such as a multi-lead component, and stocks a plurality of pallets each having a tray mounted thereon and adjusts a desired pallet to the level of the drawer path. An elevator mechanism for moving up and down and a pallet introducing mechanism for pulling out the pallet from the elevator mechanism to the pickup position along the pulling path are provided.

On the other hand, the applicant of the present application has previously proposed a component supply device having a structure in which pallets can be drawn out at two level positions. With this component feeder, when feeding a normal tray (electronic component) of low height, the pallet is pulled out using the upper level position, and when feeding a tray of high height (electronic component), it is moved downward. The pallet is pulled out using the level position on the side, and the vertical distance of the mounting head is shortened to shorten the tact time as a whole.

[0004]

In this case, in the elevator mechanism, when a pallet having a high tray is made to stand by at the lower level position, the tray becomes an obstacle, and the upper level position is used for stocking. However, when a pallet having a low tray is made to stand by at the upper level position, the stock pallet may be located at the lower level position. Therefore, in the pallet drawing operation, it is necessary to preferentially draw the upper pallet. Therefore, if simply considered, it is assumed that a pallet introduction mechanism is required for each of the two level positions, which makes the structure complicated and the control complicated.

The present invention relates to an electronic component mounting apparatus capable of introducing a pallet, which stands by at two upper and lower level positions, to a pick-up position with priority to either one with a simple structure and simple control. It is an object of the invention to provide a component supply device.

[0006]

The component supply device of the present invention comprises a pallet accommodating means for accommodating a plurality of pallets each having a large number of electronic components mounted thereon via trays with a vertical gap therebetween, and a pallet accommodating means. And a pallet introduction means for selectively pulling out any two adjacent pallets stored in the pallet at two predetermined level positions from the pallet storage means to the pick-up position of the electronic component with priority given to one of them. The pallet introduction means includes a locking arm that rotatably locks the locking receiving portions of both pallets, and a drive mechanism that rotates the locking arm.
At the tip of the locking arm, a first locking portion that locks to one pallet on the priority side and a second locking portion that locks to the other pallet are provided. The locking portion is displaced in the rotation direction so that the second locking portion does not lock with the corresponding locking receiving portion when the first locking portion locks with the locking receiving portion. It is characterized by being installed.

According to this structure, the first locking portion and the second locking portion of the locking arm correspond to the second locking portion when the first locking portion is locked in the locking receiving portion. The locking arm rotates so that the first locking portion is engaged with one of the pallets on the priority side because the locking arm is rotated so as not to be locked to the locking receiving portion. In the stopped state, the second locking portion is in the unlocked state even if there is a pallet on the non-priority side, and the pallet on the non-priority side is not pulled out even if the pallet on the priority side is pulled out. . On the other hand, when there is no pallet on the priority side, the second locking portion is locked to the pallet on the non-priority side, and the pallet on the non-priority side is pulled out. That is, even if the pallet introducing means is single, it is possible to selectively pull out one of the pallets from the pallet accommodating means with priority.

In this case, the locking receiving portion of the pallet is formed by removing the front edge portion of the pallet in a "C" shape in the horizontal plane, and the locking arms respectively have the first and second locking. It is preferable to have a pair of arms and a pair of arm pieces that rotate in mutually opposite directions in a horizontal plane.

According to this structure, since the locking arm has the pair of arm pieces that rotate in the opposite directions, the pallet locking and unlocking operations are performed by the opening and closing leg operation of the locking arm. Be seen. For this reason, the locking force of the locking arm with respect to the pallet is canceled out, and unnecessary force for moving the pallet is not applied to the pallet. Also, since the pallet is locked by the leg opening operation in the horizontal plane of the locking arm,
The vertical impact is not applied to the pallet. Therefore, it is possible to effectively prevent the electronic component from jumping out from the accommodation groove of the tray. Moreover, since the unlocking operation of the locking arm is performed in the locking receiving portion of the pallet, the pallet can be moved up and down without interfering with the locking arm in the unlocked state.

In these cases, it is preferable that the pallet introducing means selectively draws the two pallets with the upper pallet as a priority.

According to this structure, even when the pallets having the normal trays (electronic parts) of low height are waiting at the upper and lower level positions respectively, only the upper pallets can be pulled out. Then, by keeping the pallet with the tall trays (electronic parts) on standby at the lower level position at all times, the level difference of the pickup level between the short tray and the tall tray can be maintained. Can be made smaller.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An electronic component mounting apparatus equipped with a component supply apparatus according to an embodiment of the present invention will be described below with reference to the accompanying drawings. This electronic component mounting device is
It is a so-called multi-functional chip mounter and is configured to be able to mount various electronic components such as surface mount components such as chip capacitors and chip resistors and multi-lead components such as flat pack ICs. FIG. 1 is a plan view of the electronic component mounting apparatus. As shown in FIG. 1, the electronic component mounting apparatus 1 includes an apparatus main body 2 for mounting the supplied electronic components on a substrate.
A first component supply device 3 for supplying small electronic components such as surface mount components to the device body 2, and a second component supply device 4 for supplying large electronic components such as multi-lead components to the mounting device body 2. ing.

The apparatus main body 2 includes a machine base 5, a substrate transfer mechanism 6 having a set table 7 in the center of the machine base 5, a head unit 8 having two mounting heads 9 and a substrate recognition camera 10. An XY stage 11 for moving the head unit 8 in XY directions is provided. XY stage 11
The mounting head 9 faces the first component supply device 3 or the second component supply device 4 to pick up an electronic component, and further mounts the electronic component on the substrate set on the set table 7. When the mounting of the electronic component on the board is completed by repeating this operation, the board is sent forward on the carrying path 12 by the board carrying mechanism 6, and a new board is introduced to the set table 7 instead. .

The first component supply device 3 comprises a large number of cassette type tape feeders 13 arranged side by side, and the tip of the component supply side is on one side of the machine base 5 parallel to the transport path 12. It is arranged so as to face the pickup position of the mounting head 9. Each tape feeder 13 accommodates electronic components loaded in a carrier tape (not shown), and the electronic components are supplied one by one from the tip of the tape feeder 13.

The second component supply device 4 is arranged on the other side of the machine base 5 facing the first component supply device 3 at a right angle. In the second component supply device 4, a large number of electronic components are aligned on a tray T, and one or a plurality of the trays T are mounted on a pallet P. The pallet P is attached to the first component supply device 3 The electronic component is supplied to the mounting apparatus body 2 by facing the pickup position between the mounting table 7 and the set table 7.

On the other hand, a suction nozzle 14 for sucking an electronic component is detachably mounted on the lower end of each mounting head 9. A plurality of types of suction nozzles 14 are prepared, and they can be appropriately replaced according to the planar shape and weight of electronic components. In this case, the suction nozzle 14 for replacement is housed in the nozzle stocker 15 arranged on the upper surface of the machine base 5. A plurality of types of suction nozzles 14 to be used are set side by side in the nozzle stocker 15.

A component recognition camera 16 for recognizing the position of the electronic component sucked by the suction nozzle 14 is arranged near the nozzle stocker 15. The electronic component sucked by the suction nozzle 14 is displaced by the component recognition camera 16 in the X direction, the Y direction, and the θ direction (rotation angle in the horizontal plane) with respect to the axis of the suction nozzle 14 before being mounted on the substrate. To be detected. Then, based on the detection result, the displacement of the θ direction is corrected by the rotation of the suction nozzle 14, and the displacement of the X direction and the Y direction is corrected by the XY stage 11.

Next, the second component supply device 4 will be described in detail with reference to FIGS. 1 and 2. The second component supply device 4 stocks a large number of pallets P and also conveys the pallets P in a vertical direction to a predetermined level position, and an elevator mechanism 21 for mounting the pallets P from the elevator mechanism 21 to the mounting device main body. 2 and a pallet introduction mechanism (pallet introduction means) 22 for horizontally conveying the pickup position.

The elevator mechanism 21 includes a large number of pallets P.
The pallet stocker 31 accommodates a large number of pallets in the vertical direction, and the lifting mechanism 32 that lifts and lowers each pallet P via the pallet stocker 31. The pallet stocker 31 is configured by arranging a large number of shelf members 33 on which the pallets P are placed inside in a vertical direction. The right side of the pallet stocker 31 in the drawing is wide open, and the pallet P is pulled out to the apparatus main body 2 side from this portion.

The elevating mechanism 32 includes a frame (not shown) that holds the pallet stocker 31, a ball screw 34 that is screwed to a part of the frame to elevate and lower the frame, and is arranged on both sides of the ball screw 34 to elevate and lower the frame. It is composed of a pair of left and right guide rails 35, 35 for guiding the movement, and a lifting motor 36 connected to the base end of the ball screw 34 and rotating the same. By rotating the ball screw 34 in the forward and reverse directions via the lifting motor 36, the frame is guided by the guide rails 35, 35.
It is guided by and goes up and down. When the frame moves up and down, the pallet stocker 31 held by the frame moves up and down with the pallet P accommodated.

The elevator mechanism 21 configured as described above
The elevating motor 36 of the elevating mechanism 32 is connected to the controller 23, and the elevating operation is controlled by the controller 23. Then, in the ascending / descending operation, the desired level positions of the two shelf members 33 of the pallet stocker 31 and the level positions of the upper and lower two withdrawal paths 41a and 41b of the pallet introducing mechanism 22 described later are matched. However, the arrangement intervals of the respective shelf members 33 are set so that the two drawer passages 4
It is set so as to be almost the same as the arrangement interval of 1a and 41b.

On the other hand, the pallet introduction mechanism 22 is made to match the two withdrawal paths 41a and 41b, and the elevator mechanism 2
1 pulling out the pallet P to the standby path 4
1a and 41b are selectively pulled out and introduced to the pickup position. This pallet introduction mechanism 22
Is composed of a locking arm unit 42 that faces the elevator mechanism 21 and locks the pallet P, and a drive mechanism 43 that advances and retracts the locking arm unit 42 along the withdrawal paths 41a and 41b. The drive mechanism 43 is also connected to the controller 23, and the elevator mechanism 2
It works together with 1.

Before explaining the locking arm unit 42 and the drive mechanism 43, referring to FIG.
How to properly use the one withdrawal path 41a and 41b will be briefly described. As shown in the figure, two withdrawal paths 4
1a and 41b, the upper withdrawal path 41a is at the "level 1" position, and the lower withdrawal path 41b is "level 2".
And the elevator mechanism 21 is
The pallet P is appropriately brought to the position of "level 1" or "level 2". Then, on the pallet P, the pallet P in which the thin tray Ta having the low height is set is supplied from "level 1", and the pallet P in which the thick tray Tb having the high length is set is supplied from "level 2". .

As described above, since the tray T having the short length is introduced into the "level 1" and the tray Tb having the high length is introduced into the "level 2", the level of the top surface of the tray T at the pickup position is set. Is not affected by the height of the tray T, and its level difference d becomes small. Therefore, irrespective of the height of the tray T, according to the one having the highest top surface level among the trays T introduced into the pickup position,
The movement reference level of the mounting head 9 may be set. That is, the descending (raising) stroke of the mounting head 9 during the pickup operation is minimized. In this case, the determination as to whether the level is “level 1” or “level 2” is made by the height detection sensor (not shown) or the controller 2
3 is performed by processing the data input in advance.

As shown in FIGS. 4 and 5, the locking arm unit 42 includes a locking arm 51 composed of a pair of arm pieces 52, 52 and a pair of arm pieces 52, 52 which are rotatable. It is composed of an arm support block 53 that supports the arm support block 53, and a unit body 54 that supports the arm support block 53 so as to be movable back and forth in the drawing direction. Both arm pieces 5
The reference numerals 2 and 52 are each formed in a substantially "L" shape and arranged in line symmetry, and rotate in opposite directions in the horizontal plane about their bent portions. A circular protrusion 55 is provided at the tail end of each arm piece 52,
An operating member 65 of the unit main body 54, which will be described later, comes into contact with the circular protrusion 55 to rotate the arm piece 52. Further, although schematically shown in the drawing, a compression spring 56 is stretched between both arms 52, 52,
Both arm pieces 52, 52 are urged in the opening direction, that is, the locking direction. The pivot shaft 57 of each arm piece 52 penetrates the arm support block 53 in the vertical direction, and a lower end portion thereof abuts a part of the arm support block 53 to open the arm piece 52 in the leg opening direction. A restriction disk 58 for restricting the rotation end position of is attached.

Further, at the tip of each arm piece 52, a pin-shaped first locking portion 59 protruding upward and a pin-shaped second locking portion 60 protruding downward are respectively provided. It is installed. The first locking portion 59 and the second locking portion 60 are arranged in the horizontal plane with a slight displacement in the rotation direction, and are arranged with respect to the locking receiving portion Pa of the pallet P as the first locking portion 59. The engaging portion 59 is adapted to be preferentially engaged with the second engaging portion 60. Specifically, each arm piece 52 is arranged so as to face the gap between the pallets P waiting in the above “level 1” and “level 2”, and the first locking portion 59 is “level 1”. The pallet P that is on standby is locked, and the second locking portion 60 locks the pallet P that is on “level 2” standby.

Therefore, when both arm pieces 52, 52 are locked (opening) while the pallet P is on standby at "level 1" and "level 2", respectively,
The locking portion 59 locks the "level 1" pallet P,
The second locking portion 60 cannot lock the “level 2” pallet P and maintains the unlocked state. of course,
The same applies when the pallet P is on standby only at "level 1". Also, Pallet P only for "Level 2"
In the standby state, the second locking portion 60 locks the “level 2” pallet P (see FIG. 6). That is,
The locking arm 51 locks the upper (“level 1”) pallet P so that it is preferentially pulled out.

As described above, since the upper first locking portion 59 and the lower second locking portion 60 are provided so as to be displaced in the rotational direction, the single locking arm 51 allows By giving priority to the upper pallet P, the upper and lower pallets P can be selectively locked. That is, the upper pallet P can be preferentially pulled out with a simple structure and mechanically.

On the other hand, the lock receiving portion Pa of each pallet P is
The horizontal edge portion Pb of the pallet P is cut out in a "C" shape. With respect to the lock receiving portion Pa, both arm pieces 52, 52 perform locking and unlocking operations while facing the inside of the lock receiving portion Pa. Therefore, the locking arm 51
In the unlocked state, each pallet P can be moved in the vertical direction without retracting it. For example, a used pallet P may be replaced by the elevator mechanism 2
After returning to 1 and releasing the lock, if a new pallet P is exposed to this, the pallet P can be locked instantly.

An arm support block 53 for supporting the locking arm 51 is engaged with a rail portion 63 of a unit body 54, which will be described later, so that the slide portion 61 is formed at a lower portion thereof. A pair of left and right stoppers 44, 44 abut on the arm support block 53 when the locking arm 51 advances to the locking position.

The unit main body 54 has an intermediate base 62.
And a rail portion 63 protruding from the base 62 and the base 6
2 and a slider 64 attached to the lower side. The slider 64 is engaged with a center rail 71 of the drive mechanism 43, which will be described later, and the unit main body 54 is guided by the center rail 71 and is moved back and forth in the drawing-out direction of the pallet P. A pair of left and right actuating members 65, 65 are fixed to the upper surface of the base 62, and the pair of actuating members 65, 65 serve as the pair of arm pieces (the circular protrusion 5).
5) By making contact with 52 and 52, respectively, the locking arm 51 is unlocked against the compression spring 56.

A series of locking and unlocking operations of the locking arm unit 42 will be described with reference to FIG. In order to return the used pallet P to the elevator mechanism 21 by the drive mechanism 43, the locking arm unit 42
As the vehicle moves forward on the center rail 71, when the locking arm 51 reaches the locking position, that is, the pallet P
When is accommodated in the elevator mechanism 21, the arm support block 53 hits the stopper P. However, the unit body 54 further advances so as to overrun. Then, the operating member 65 of the unit main body 54 hits the arm piece 52 and presses it. By this pressing of the actuating member 65, the locking arm 51 performs the locking releasing operation against the compression spring 56, and the used pallet P is opened (see (b) in the figure).

Here, the elevator mechanism 21 is driven,
The new pallet P faces the locking arm 51. Then, the overrun unit main body 54 starts retreating. As a result, the operating member 65 is retracted and the locking arm 51 is locked by the compression spring 56 in the reverse order of the above (see FIG. 11A). Locking arm 51 is pallet P
When the lock is engaged, the slide portion 61 of the arm support block 53 is attached to the stopper portion of the unit main body 54 almost at the same time.
Is hit, the arm support block 53 moves backward together with the unit main body 54. In this way, the locking arm 51 is engaged with and disengaged from the pallet P, and the pallet P is exchanged.

In this way, the engaging / disengaging operation of the locking arm 51 can be performed by using the drive mechanism 43 as a power source. That is, a dedicated actuator for engaging and disengaging the locking arm 51 is unnecessary, and the structure can be simplified,
Moreover, the cost can be reduced.

Next, the drive mechanism 43 will be described with reference to FIG. As shown in the figure, the drive mechanism 43 includes a center rail 71 that supports the locking arm unit 42 so as to move back and forth, a drive motor 72 that moves the locking arm unit 42 forward and backward along the center rail 71, and a drive motor 72. The timing belt 73 for transmitting the rotational power of the above to the locking arm unit 42 is provided. Timing belt 7
Reference numeral 3 denotes a pair of driven pulleys 74, 74 spaced apart in the drawing direction of the pallet P, a drive pulley 75 attached to the main shaft of the drive motor 72, and the driven pulley 74 and the drive pulley 75. A pair of intermediate pulleys 76, 7
It has been crossed over. Also, the timing belt 7
A side portion of the unit main body 54 of the locking arm unit 42 is fixed to 3, and the locking arm unit 42 moves forward and backward as the timing belt 73 travels forward and backward.

The drive motor 72 is composed of a stepping motor, and its drive is controlled by the controller 23. In this case, the controller 23 controls the drive motor 72 to move the locking arm unit 42 forward and backward at a constant speed, but decelerates the locking arm unit 42 forward and backward in the above-described overrun portion. The locking position of the locking arm 51 and the position where the unit main body 54 overruns and finally stops are detected by sensors and switches (not shown), and the controller 23 receives the detection signal and operates the drive motor 72. Slow down. For this reason,
The locking and unlocking operations of the locking arm 51 are performed extremely slowly. The deceleration may be stepwise or acceleration. Also, the speed may be reduced only during the locking operation.

By performing such control, both arm pieces 52, 52 hit the lock receiving portion Pa of the pallet P during the locking operation of the locking arm 51, but the impact is extremely small, and the pallet is made. The electronic component mounted on the P does not cause a problem such as popping out from the accommodation groove of the tray T. Further, since both arm pieces 52, 52 themselves hit the pallet P in the horizontal direction, it is possible to prevent the electronic parts from popping out in this respect as well. Further, the locking forces of the two arm pieces 52, 52 act in the opposite directions and cancel each other out, so that the pallet P is not moved by the arm pieces 52, and in this respect also, popping out of the electronic component can be suppressed.

Note that, contrary to the above embodiment, it is also possible to cause the locking arm to perform the locking operation by the closing operation and the unlocking operation by the opening operation. In such a case, the locking receiving portion of the pallet is formed by notching two portions on the left and right in a "C" shape so that a convex portion is formed at the center of the horizontal edge portion.

[0039]

As described above, according to the component supply apparatus of the present invention, the pallets that are made to stand by at the two upper and lower level positions are
In introducing either of them to the pickup position with priority, this can be done mechanically with a single locking arm, which simplifies the structure and control.

[Brief description of drawings]

FIG. 1 is a plan view of an electronic component mounting apparatus equipped with a component supply device according to an embodiment of the present invention.

FIG. 2 is a side view of a second component supply device according to the embodiment.

FIG. 3 is an explanatory diagram illustrating the proper use of “level 1” and “level 2”.

FIG. 4 is a plan view around a locking arm unit of the pallet introduction mechanism.

FIG. 5 is a side view around a locking arm unit of the pallet introduction mechanism.

FIG. 6 is an operation explanatory view for explaining locking and unlocking operations of the locking arm.

FIG. 7 is a plan view of a pallet introduction mechanism.

[Explanation of symbols]

1 Electronic component mounting device 2 device body 4 Second parts supply device 9 mounting head 21 Elevator mechanism 22 Pallet introduction mechanism 23 Controller 41 Withdrawal path 42 Locking arm unit 43 Drive mechanism 44 Stopper 51 Locking Arm 52 Arm Piece 53 Arm support block 54 unit body 59 First locking part 60 Second locking part 65 Working member 72 Drive motor T tray P pallet Pa Lock receiving part Pb horizontal edge

Claims (3)

(57) [Claims] 1. A pallet accommodating means for accommodating a plurality of pallets each having a large number of electronic components mounted thereon via a tray with a gap between them in the vertical direction, and an arbitrary pallet accommodating one of the pallets accommodated in the pallet accommodating means. Pallet introducing means for selectively pulling out two pallets at predetermined two level positions from the pallet accommodating means to the pick-up position of the electronic component with priority given to one of the pallet introducing means, The pallet has a locking arm for rotatably locking the locking part and a drive mechanism for rotating the locking arm. A first locking portion that locks and a second locking portion that locks on the other pallet
An engagement portion is provided, and the first engagement portion and the second engagement portion correspond to the second engagement portion when the first engagement portion is engaged with the engagement receiving portion. The component supply device in the electronic component mounting device, wherein the component supply device is arranged so as to be displaced in the rotation direction so as not to be engaged with the engagement receiving portion. 2. The lock receiving portion of the pallet is formed by removing a front edge portion of the pallet into a “C” shape in a horizontal plane, and the lock arms are respectively provided with the first and second lock arms. The component supply device for an electronic component mounting device according to claim 1, further comprising a pair of arm pieces provided with both locking portions and rotating in opposite directions in a horizontal plane. 3. The component supplying device in an electronic component mounting apparatus according to claim 1, wherein the pallet introducing means selectively draws out the two pallets by giving priority to an upper pallet.