JPH0321111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an automatic cassette exchange method for a component feeding device applied to a component mounting device used for mounting chip-type electronic components onto a circuit board.

Conventional technology Conventionally, in devices for mounting chip-type electronic components, such as leadless resistors and capacitors, on circuit boards, the electronic components are mounted in a line on tape.
Electronic components are sequentially supplied one by one while this tape is unrolled from a reeled state.

The reel is integrated with a feeding mechanism to form a cassette. In this cassette, a large number of different stored parts are lined up in a line on a carriage of a parts feeder and are removably loaded, and the carriage is moved in the direction in which the cassettes are lined up, and any cassette is placed at the parts receiving position of the component placement apparatus. to correspond to.

Problems to be Solved by the Invention Conventionally, when a part of the cassette on the carriage breaks, the cassette has to be replaced manually. In this case, a cassette of the same type as the missing part is selected from a shelf containing a large number of replacement cassettes and replaced. Therefore, there is a problem in that it is inefficient and requires about 5 minutes to replace the cassette, and the component mounting device must be stopped during this time, which reduces the operating rate of the component mounting device. One cassette usually stores around 5,000 electronic components, but in cassettes for parts that are used in large numbers,
The number of replacements per day is large, resulting in a significant problem of lower operating rates.

An object of the present invention is to solve the problems of the conventional method, and to provide a replacement method that allows cassettes to be replaced without stopping the operation of the component mounting device, thereby eliminating loss of operating time. .

Means for Solving the Problems In the automatic cassette exchange method for a parts feeding device of the present invention, a spare storage area is prepared near the movement route of a carriage that loads cassettes in a line to place new cassettes for replacement. An empty storage area with no cassettes is prepared next to any cassette scheduled for automatic exchange among the cassettes on the carriage, and a transfer means capable of transporting cassettes between the spare storage area and the carriage is provided. This is a method for preparing and supplying new cassettes from the preliminary storage area to the empty storage area. The carriage is placed near a component mounting device that mounts components onto a board.

In detail, the process of detecting that the number of parts remaining in each of the cassettes scheduled for automatic replacement has reached a predetermined number and giving a warning that the parts are out of stock, and the process of notifying the parts of the cassettes that have been scheduled for automatic replacement when replacing the board of the component mounting device after this warning. a step of loading a new cassette of the same type of parts as the previously announced cassette in the spare storage area into an adjacent empty storage area using the transfer means; a step of detecting that a part is out of stock; and upon this detection, changing the subsequent operation of the carriage to correspond to the parts receiving position from the position of the out of parts cassette to the position of a new cassette in the empty storage space next to it; This method includes a step of removing the out-of-component cassette with the transfer means when the component mounting device replaces the board.

Effect: According to this method, before the parts in the cassette on the carriage run out, a new cassette is placed in the empty storage area of the carriage, so there is no chance that parts in the cassette will run out while parts are being installed on one board. Even if the parts are removed from the new cassette, they can be continued to be installed. Therefore, the cassette can be replaced when replacing the board, there is no need to stop the component mounting device for replacing the cassette, and there is no problem of lower operating efficiency. In addition, parts are supplied directly to the component mounting device from a new cassette placed in the empty storage area.
For example, unlike cases involving a step of transferring the cassettes from an empty storage area to the original storage area, the number of steps is small and the control program can be simple. Furthermore, in this way, the carriage is operated so as to supply parts from an empty storage area different from the original storage area.
Since the empty storage area is located next to the original storage area, the amount of change in the moving distance of the carriage when selecting cassettes is small.
It is difficult to waste operating time. That is, when a plurality of types of parts are mounted on one board, the carriage is moved after taking out the parts from one cassette lined up on the carriage and when taking out the parts from another cassette. Since this travel time results in loss time for the parts apparatus, generally the cassettes are arranged in accordance with the order in which the parts are taken out, so that the travel distance of the carriage is minimized. In this case, if you change the removal of parts to the empty storage area, the distance the carriage will have to move will likely become longer, but since the empty storage area is located next to the original storage area, the amount of change in the movement distance of the carriage will be kept to a minimum. , it is possible to reduce loss time.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 5. In FIG. 1, 1 is a component mounting device, and a component feeding device 2 is installed behind it. The component mounting device 1 includes an adhesive application head 5 and a component mounting head 6 on a gate-shaped frame portion 4 of a base 3.
are arranged side by side, and an XY table 9 on which two substrates 7 and 8 are placed is installed below.
The XY table 9 is placed in the left and right direction (X direction) of the base 3.
and can move freely in the front-back direction (Y direction). 10 is a substrate carrying-in guide, and 11 is a substrate carrying-out guide. The component mounting head 5 has a plurality of component suction nozzles 13 attached to a rotating frame 12 that rotates horizontally. Each component suction nozzle 13 is pipe-connected to a suction device (not shown), and is driven up and down by a lift drive device 14.

The parts feeding device 2 includes a reciprocating table 16 on which a large number of cassettes 15 are placed in a row, and a reciprocating drive device (not shown) that moves the reciprocating table 16 in the direction in which the cassettes 15 are lined up (Z-axis direction). . 17 is a guide rail of the carriage 16. The carriage 16 is provided with empty storage spaces S _A , S _B , . . . (FIG. 4) in which cassettes 15 can be placed next to one or more cassettes 15 to be automatically exchanged. A cassette 15 is placed near the rear of the reciprocating path of the carriage 16.
A cassette transfer device 19 for transferring the cassettes 15 between the preliminary storage area forming table 18 and the carriage 16 is provided.

As shown in FIGS. 2 and 3, the cassette 15 includes a main reel 2 on which a component storage tape 20 is wound.
1 and a presser paper take-up reel 22 are rotatably attached to a cassette frame 23, and a feed lever 24 is provided at the tip of the cassette frame 23. The component storage tape 20 stores a large number of components 25 such as chip-type electronic components in a line and presses them onto a holding paper 26.
It is covered with The feeding lever 24 feeds out the component storage tape 20 pitch by pitch of the components 25 by rotating downward, and is pushed downward by the cylinder device 27 provided on the rotating frame 12 of the component mounting head 5. . The presser paper 26 is wound around the presser paper take-up reel 22 at the guide piece 28 of the cassette frame 23, and the component 25 is exposed on the tip side of the cassette frame 23 beyond this.
Note that the rotating frame 12 is equipped with a component outage detection sensor 2 that detects when the component 15 in the cassette 15 is no longer present.
9 is provided.

The cassette frame 23 has a cassette lock pawl 30 and a lock protrusion 31 provided on the carriage 16.
It has an engagement recess 32 on the lower surface that engages with. The cassette lock pawl 30 is supported so as to be movable up and down, connected to a lock release rod 33 that can move forward and backward, and is biased in the locking direction by a compression spring 34. The unlocking rod 33 projects from the carriage 16 and is pushed against the compression spring 34 by the unlocking rod drive cylinder 35 of the standby storage platform 18.

The reserve storage area forming table 18 is a reserve storage area for multiple cylinder locations.
P ₁ to P ₃ are provided in the direction in which the cassettes are lined up on the carriage 16.

The cassette transfer device 19, as shown in FIG. body 38 and front and rear guides 3 provided on this transverse body 38
It has a front-rear moving body 40 that moves along 9. The chuck 36 is attached to the longitudinal moving body 40 so as to be movable up and down. Driving means in each direction is omitted from illustration.

Note that each driving means such as the component mounting device 1 and the component feeding device 2 is controlled by one program-type central control device (not shown). This central control device is provided with a counter that inputs the number of components in each cassette 15 and counts each time a component 25 is mounted by the component mounting device 1. Furthermore, a notice means is provided which gives a notice when the remaining quantity of parts reaches a set number as counted by a counter.

An outline of the operation of the component mounting device 1 will be explained. XY
Adhesive is applied to the substrate 7 on the right side of FIG. 1 on the table 9 by the adhesive application head 6 for each component mounting position. The board 8 on the left side of FIG. 1 on the XY table 9 has been shifted from the right side on the XY table after adhesive application, and a component 25 is mounted on it by the component mounting head 5. Parts mounting head 5
is caused by each component suction nozzle 13 of the rotating frame 12,
The parts 25 of the cassette 15 are successively suctioned, carried onto the board 8, and mounted by pressing. One or more of various types of components 25 are mounted on the board 8 . At this time, parts 25 of the same type are successively taken out from the same cassette 15 and mounted. Part 2
When changing the type of parts 5, the carriage 16 is moved and the cassette 15 containing the parts 25 of that type is moved.
, the component receiving position N of the component mounting device 1 (Fig. 2)
It corresponds to the suction nozzle 13 of.

We will explain how to replace the cassette. In addition, shuttle bus 1
The following automatic exchange is performed only for the cassette 15 provided with empty storage areas S _A , _{S B} .
As for the cassette 15 which is not provided with S _B ..., it is replaced manually as before. It is assumed that the cassettes 15 provided with empty storage spaces S _A and S _B are those that are frequently used.

Figures 4 and 5 illustrate the automatic exchange procedure.
Referring to the figure, the case of a cassette _15A provided with an empty storage area S _A will be explained. Parts 25 of cassette 15 _A
The number of stored parts is, for example, 5,000, but when the remaining number of parts reaches a predetermined number, for example, 200 to 300, a first warning of parts shortage is given and the operator is notified. The method of advance notice is
By monitor, notification lamp, buzzer, etc.
The remaining amount is detected by the counter of the above-mentioned central control device.

When the first parts shortage notice is given, the worker carries the same type of cassette 15 _A ' from the cassette storage shelf, etc. and places it in the spare storage area P ₁ of the preliminary storage area forming table 18.
Place it in Continuing to install parts, the remaining parts in the first cassette 15 _A , which has already been announced, will be, for example,
When the number of parts reaches 20 to 30, a second warning of out-of-parts is given. In this case, the remaining amount is detected by a counter in the same manner as described above.

The second notice of parts shortage is given by electrical signal,
When this signal is received, the mounting of the components 25 on the board 8 being mounted at that time is completed, and when the board 8 is to be replaced, the cassette transfer device 19 is operated and the cassette transfer device 19 is moved to the spare storage area.
Place the cassette 15 _A ' of P ₁ in the empty storage area S _A next to the second cassette 15 _A that has already been announced (arrow Q in Fig. 4). At this time, the carriage 16 is moved to a position where the empty storage area S _A corresponds to the reserve storage area P ₁ and is stopped there.
This movement may be performed while the carriage 16 is returning to the original position when replacing the board 8, or may be when the carriage 16 is moved from the original position again after returning to the original position in order to attach the next board 8. .

After placing a new cassette 15 _A ' in the empty storage area S _A ,
The mounting of components onto the next board 8 begins. When the second pre-announced cassette _15A runs out of parts 25, it is detected by the part-out detection sensor 29 (FIG. 2) of the component mounting head 5, and based on the detection signal,
Perform automatic program changes. As a result, the parts 25 are taken out from the new cassette _15A ' in the empty storage area _SA , and the part mounting is continued. That is, when taking out the parts 25 of the type of parts cassette _15A , the new cassette _15A ' is placed at a position corresponding to the suction nozzle 13 at the parts receiving position N (FIG. 2) of the parts mounting head 5. Shuttle carriage 16
make it work.

After this, when the parts mounting on the board 8 is completed and the board 8 is to be replaced, the cassette 15 _A of out-of-components is taken out to the spare storage area P ₁ by the cassette transfer device 19 (arrow R in Fig. 4B), and the parts for the next board 8 are removed. Perform the installation. After this, the parts 25 are taken out from the cassette 15 _A ' in the empty storage area S _A. The cassettes _15A with missing parts taken out to the spare storage area _P1 are taken out to other places by the operator as appropriate.

When the number of parts remaining in the cassettes 15 _A ' in the empty storage area S _A reaches a predetermined number, a first notice of out-of-parts is given in the same manner as above, and this notice prompts the worker to purchase new cassettes 15 _A '' of the same type. (C in Fig. 4) is placed in the spare storage area P _1.After this, when there is a second parts shortage notice in the same way as above, when the board 8 is replaced, the empty original storage area S _A ′ is placed. Place the new cassette 15 _A '' into the cassette (arrow T in FIG. 4).

In this way, the cassettes _15A , _15A ', . . . are arranged alternately in the original storage area S _A ' and the empty storage area S _A next to it, and parts supply is continuously performed.

Although the case of one type of cassettes _15A , _{15A ' ,} . one board 8
If two or more cassettes 15 are notified of out-of-parts while parts are being installed, when replacing the board 8, all cassettes 15 for which out-of-parts notifications have been made will be
New cassettes 15 are placed in empty storage areas S _A , S _B .

Although automatic cassette exchange is performed as described above,
According to this method, before the parts 25 in the cassette 15 of the carriage 16 are exhausted, the empty storage space of the carriage 16 can be filled.
Since new cassettes 15 are placed in S _A , S _B .
Even if the part 25 of No. 5 is used up, the part 25 can be taken out from a new cassette 15 and the mounting can be continued. Therefore, when replacing the board 8, the cassette 1
5 can be replaced, there is no need to stop the component mounting device 1 for replacing the cassette, and there is no problem of a decrease in the operating rate. In addition, since parts are directly supplied to the component mounting device 1 from new cassettes 15 placed in the empty storage areas S _A , S _B , _. . .
Unlike the case where the step of moving the original cassette 15 from S _B , . moreover,
In this way, empty storage areas S _A , S _B ,
The carriage 16 is operated to supply parts from ..., but since the empty storage areas S _A , S _B , ... are adjacent to the original storage area, the amount of change in the moving distance of the carriage 16 when selecting a cassette is small. , there is less waste of operating time. That is, when mounting a plurality of types of parts 25 on one board 8, after taking out the parts 25 from one cassette 15 lined up on the carriage 16, when taking out the parts 25 from another cassette 15, The stand 16 moves. Since this movement time becomes a loss time for the parts apparatus, generally the cassettes 15 are arranged in accordance with the order in which the parts 25 are taken out, so that the movement distance of the carriage 16 is minimized. In this case, if you change the removal of parts to empty storage areas S _A , S _B ,...
Although the moving distance of the carriage 15 tends to be long,
Since S _A , S _B , ... are adjacent to the original storage area,
The amount of change in the moving distance of the carriage 16 is kept to a minimum,
Loss time can be reduced.

In the embodiment described above, there are a plurality of empty storage areas _SA , _SB , . In addition, the cassette feeding device 19
are not limited to those shown, for example, individual storage areas.
It may be of a configuration in which it is sent straight forward from P ₁ ... P ₃ as it is. Furthermore, when taking out the cassette 15 of out-of-part parts from the carriage 16, it may be taken out directly to another location instead of returning it to the reserve storage area _P1 ... _P3 as in the previous embodiment. Furthermore, the first part-outage notice does not necessarily need to be given.

Further, in the above embodiment, empty storage areas S _A , S _B , . . . were provided only for frequently used cassettes 15, but as shown in FIG.
5, an empty storage space S ₁ ...S _o may be provided next to it.
It is assumed that the number of reserve storage sites P ₁ ′...P _o ′ installed on the backup storage space forming table 18' is the same as the number of empty storage sites S ₁ ...S _o . Further, the cassette feeding device 19 (see FIG. 3, not shown in FIG. 6) is movable over the entire width of the preliminary storage space forming table 18'.

With this configuration, although the width of the parts feeding device becomes longer, all cassettes 15 can be replaced automatically.

ADVANTAGEOUS EFFECTS OF THE INVENTION The automatic cassette replacement method for a component feeder according to the present invention has the advantage that cassettes can be replaced without stopping the operation of the component mounting device, and a reduction in operating efficiency due to cassette replacement can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a component mounting device and a component feeding device used in an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a partially enlarged perspective view thereof, and FIG. 4 is a cassette automatic FIG. 5 is a diagram explaining the procedure of the automatic cassette exchange method, and FIG. 6 is a partial plan view of another embodiment. DESCRIPTION OF SYMBOLS 1... Component mounting device, 2... Component feeding device, 3... Base, 5... Component mounting head, 7, 8... Board, 9...
XY table, 13...Component suction nozzle, 15, 1
5 _A , 15 _A ′, 15 _A ″…cassette, 16… carriage,
18... Spare storage area forming table, 19... Cassette transfer device, S _A , S _B ... Empty storage area, P ₁ to P ₃ ... Spare storage area, N...
Parts receiving location.

Claims (1)

[Claims] 1. A reciprocating table disposed near a component mounting device that mounts components onto a board, on which component accommodating cassettes are lined up in a row and removably mounted; An automatic cassette exchange method applied to a parts feeding device equipped with a carriage driving device that corresponds to a parts receiving position of a mounting device, the method comprising at least placing a new cassette for replacement near the reciprocating path of the carriage. One reserve storage area is prepared, a transfer means capable of transferring cassettes between the reserve storage area and the carriage is prepared, and a cassette is placed next to any cassette scheduled for automatic exchange among the cassettes on the carriage. A process of preparing an empty storage area for unloaded parts, and then detecting that the number of parts remaining in each of the cassettes scheduled for automatic replacement has reached a predetermined number and giving a notice of out-of-parts; When replacing a board, a step of placing a new cassette of the same type of components as the previously announced cassette in the spare storage area in an empty storage space next to the previously announced cassette of the carriage, and then mounting the component. A step of detecting that the parts in the previously announced cassette have run out while the device is restarting, and a subsequent operation of moving the carriage to the parts receiving position based on this detection from the position of the out of parts cassette. A component characterized in that the step of changing the position of the cassette to a new cassette in an adjacent empty storage area, and the step of taking out the out-of-component cassette with the transfer means when the component mounting device replaces the board thereafter. Automatic cassette exchange method for feeding device.