JPS61121398A - Method of automatically exchanging cassette for part feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field This invention is applicable to chip-type electronic component circuits)! The present invention relates to an automatic cassette replacement method for a component feeding device that is applied to a component mounting device used for mounting onto an S plate.

Conventional technology Conventionally, in equipment for mounting chip-type electronic components, such as leadless resistors and capacitors, on circuit boards, the electronic components are attached to a tape in a row, and the electronic components are unwound from a reel. 1(lI) is sequentially supplied.

The reel is integrated with a feeding mechanism and configured as a cassette. In this cassette, a large number of different stored parts are arranged in a row on a carriage of a parts feeding device and are loaded in a large number at will, and the carriage is moved in the direction in which the cassettes are lined up.
An arbitrary cassette is made to correspond to a component receiving position of a component mounting device.

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 cassette whose part is missing 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 it takes 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. A cassette of l1lIJ normally stores about 5,000,111 electronic parts, but cassettes for parts that are used frequently have to be replaced many times in a day, resulting in a serious problem of reduced operating efficiency.

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

Means for Solving the Problems The automatic cassette replacement method of the parts feeding device of the present invention includes providing a spare storage area for storing new cassettes for replacement near the movement route of the carriage that loads cassettes in a line. prepare,
Also, place the cassette at the end of the cassette arrangement direction on the carriage.
1 possible at least one empty space'? =(Q) and a method of replacing cassettes by providing a transfer means capable of transporting cassettes between the reserve storage area and the carriage, and temporarily placing new cassettes from the reserve storage area in the empty storage area. The carriage is placed near a component mounting device that mounts components onto a board.

In detail, at least one empty storage space in which a cassette/ ) can be placed is prepared at the end of the cassette arrangement direction on the carriage, and after that, the amount of parts remaining in any cassette on the carriage is set to a predetermined 111 il. a step of detecting that the number of parts has reached the number of parts and giving a notice that the parts are out of stock, and when the component mounting device replaces the board after the notice of the parts being out of stock, a new cassette of the same type of parts as the previously announced cassette in the spare storage area. a step of moving the carriage to the empty storage area, a step of detecting that the component of the previously announced cassette has run out while the component mounting device (n;1) is restarting, and by this detection,
7 steps of changing the position of the out-of-parts cassette to the position of the new cassette in the empty storage area to correspond to the parts receiving position of the carriage; and after this, the parts mounting device replaces the board. (2) when said out-of-parts cassettes are taken out by said transfer means, and then, during the replacement of the board of the component mounting device, the cassettes in the empty storage area are transferred to the original storage area where the out-of-parts cassettes were placed. This method includes a step of replacing the cassette with a cassette, and a step of changing the subsequent operation of the carriage to correspond to the component receiving position from the empty storage area to the position of the replaced cassette.

Function: According to this method, a new cassette is placed in the empty storage area of the carriage before the parts in the cassette on the carriage run out, so even if the parts in the cassette run out while parts are being installed on one board, there is no problem. , parts can be removed from the new cassette and installation can be continued.

Therefore, the cassette can be replaced when replacing the board,
There is no need to stop the component mounting device for cassette replacement, and there is no problem of lower operating rate. Further, since the cassette placed in the empty storage area of the carriage is replaced with the original cassette taken out due to out of parts, the empty storage area can be used in common for replacing all the cassettes on the carriage. Therefore, it is not necessary to individually throw empty storage spaces to all the cassettes on the carriage, and the number of empty storage spaces required can be reduced.

That is, the number of empty storage areas may be equal to the number of cassettes that are expected to be out of parts per one board, and one empty storage area may be sufficient. Furthermore, since the cassette in the empty storage area is replaced with the original cassette position, the operation of the carriage for selecting the cassette can be shortened. That is, when a plurality of types of parts are mounted on a single board, the carriage moves after taking out the parts from one cassette lined up on the carriage and then when taking out the parts from another cassette. Since this travel time becomes a loss time for mounting components, generally the cassettes are arranged in accordance with the order in which the components are taken out, so that the travel distance of the carriage is minimized. In this case, if parts are taken out from the empty storage area, the moving distance of the carriage is likely to become longer, but since the removal of parts from the empty storage area is temporary, loss time can be reduced.

An embodiment of the invention for each embodiment is shown in FIGS. 1 to 5, and will be explained below. In FIG. The component mounting device 1 has an adhesive coating slot 5 and a component mounting slot 6 arranged side by side in a gate-shaped frame 4 of a base 3, and below these, two substrates are mounted. An XY table 9 on which 7.8 is placed is installed.

The XY table 9 is freely movable in the left-right direction (Y direction) and the front-back direction (Y direction) of the base 3. 1(
1 is the board loading guide, and 11 is the gS plate exit 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 connected to a suction device (not shown) through piping,
And it is driven up and down by the up and down drive device 14.

The parts feeding device 2 includes a carriage 16 on which a large number of cassettes 15 are placed in a row, and a carriage 16 on which a large number of cassettes 15 are placed in a row, and
Reference numeral 17 denotes a guide rail of the carriage 16, which includes a reciprocating drive device (not shown) for moving the carriage 16 in the axial direction. At the end of the carriage 16 in the cassette arrangement direction, there are a plurality of empty storage spaces S! where the cassettes 15 can be placed! -33 (Fig. 4) are provided. Near Ig of the reciprocating path of the carriage I6
On the t& direction, a cassette transfer device 19 is provided for transferring a preliminary cassette 15 (Ii# storage area forming base 8 is placed and the cassette is placed between the preliminary storage area forming table 18 and the carriage 16).

As shown in FIGS. 2 and 3, the cassette 15 has a main reel 21 wound with a component storage tape 20 and a presser paper take-up reel 22 rotatably attached to a cassette frame 23. A feeding lever 24 is provided at the tip of the frame 23. The parts storage tape 20 is
A large number of components 25 such as chip-type electronic components are housed in a line and covered with a presser paper 26. By rotating the feed lever 24 downward, the component storage tape 20 is moved to the component 2.
It is a device that feeds out 1 bit and 7 bits of 5, and it takes 5 throats to install parts.
is pushed downward by the cylinder device 27 provided on the rotating frame 12. The presser paper 26 is wound onto the presser paper take-up reel 22 at the guide piece 28 of the cassette frame 23,
This is also an illusion, and the part 25 is on the tip side of the frame 23.
is exposed. Note that the rotating frame 12 is equipped with a component outage detection sensor 29 that detects when the component 15 in the cassette 15 is no longer present.
is the provision.

The cassette frame 23 has an engagement recess 32 on its lower surface that engages with a cassette lock pawl 30 and a protrusion 31 provided on the carriage 16. The cassette lock claw 30 is supported by a lock release rod 3 that is freely movable up and down and can move forward and backward.
3 and is biased in the locking direction by a compression spring 34. The lock release rod 33 protrudes from the carriage 16 and is pushed against the compression spring 34 by the lock release rod driving cylinder 35 of the preliminary storage forming table 18.

The reserve storage area forming table 18 has multiple locations of reserve storage areas P1 to P3.
are provided in the cassette arrangement direction of the carriage 16.

The cassette transfer device 19, as shown in FIG.
The opening/closable chinoyaku 36 that grips the stand 18 is made three-dimensionally movable, and the transverse body 3B moves along the row guide 37 to the; of the preliminary storage forming table 18;
A longitudinal moving body 40 that moves along a longitudinal guide 39 provided in
and has. The chinoyaku 36 is attached to the longitudinally movable body 4G so as to be movable up and down. Driving means in each direction are not shown.

Note that each driving means such as the component mounting device 5!1 and the component feeding device 2 is controlled by one program-type central control device (not shown). The number of parts for each cassette 15 is input into this central control device, and the component mounting device l
A counter is provided to count each time a component 25 is mounted. Further, a warning means is provided which gives a warning when the remaining amount of parts reaches a set number as counted by this counter.

An outline of the operation of the component mounting device 1 will be explained. Adhesive is applied to the substrate 7 on the right side of FIG. 1 on the XY table 9 using the gutter 6 at each component mounting position. The substrate 8 on the left side of FIG. 1 on the XY table 9 is the one that has been shifted from the right side on the XY table 9 after adhesive application has been completed.
A component 25 is mounted by the component mounting head 5. The component mounting nozzle 5 is operated by each component suction nozzle 13 of the rotating frame I2.
The parts 25 of the cartridge case 15 are sequentially suctioned, carried onto the board 8, and pressed and mounted. A plurality of various types of parts 25 are mounted on the board 8. At this time,
Components 25 of the same type are successively taken out from the same cassette 15 and mounted. When changing the type of component 25, the carriage 16 is moved and the cassette [5 containing the component z5 of that type is transferred to the component suction nozzle 13 at the component receiving position N (FIG. 2) of the component mounting device l. Make it correspond.

The cassette exchange method will be explained with reference to FIGS. 4 and 5. The case of an arbitrary cassette 15A of the carriage 16 will be explained. For example, the number of parts stored in cassette 15^ is 500.
0 pieces, but the remaining number of parts is a predetermined number, for example 200 to 30 pieces.
When the number reaches 0, the first warning of parts shortage is given and the operator is notified. The method of advance notice is the monitor or notification lamp,
According to Buzzer et al. The remaining amount is detected by the counter of the above-mentioned central control device.

When the first parts outage notice is given, the worker must select the cassette +5 containing parts 25 of the same type as cassette 15A.
A' is brought from a cassette storage shelf or the like and placed in the preliminary storage area P1 of the preliminary storage area forming table 18. The parts mounting continues as it is, and when the remaining amount of parts in the cassette 15A, which has been previously notified of the first part shortage, reaches, for example, 20 to 30111 il, a second parts shortage notice is given. In this case, the remaining quantity is detected by a counter as described above.The second notice of parts shortage is given by an electric signal. When the cassette transfer device 19 is operated and the cassette 15A' from the reserve storage area P1 is placed in the empty storage area S1 of the carriage I6 (arrow Q in FIG. 4(A)), the cassette transfer device 19 operates and the cassette 15A' from the preliminary storage area P1 is placed in the empty storage area S1 of the carriage I6 (arrow Q in FIG. 4(A)). , shuttle 16
is stopped at the origin position. As a result, the empty storage space S has come to a position corresponding to the preliminary storage space pt.

After placing a new cassette 15A' in the empty storage space S1, mounting of components onto the next board 8 is started. Then, when the parts 25 of the 7th floor F] 5A for which the out-of-parts warning has been made are exhausted, the out-of-parts detection sensor 29 (
(Fig. 2), and the program is automatically changed based on the detection signal. With this change, the component 25 is taken out from the new container 5A' in the empty storage area S1 and the component mounting is continued. In other words, the parts-out cassette 15
When taking out the part 25 of type A, the carriage 16 is moved so that the new cassette 15A' of the empty τ field S comes to a position corresponding to the suction nozzle 13 of the part receiving device N of the part mounting throat 5. make it work.

After that, when the board 8 is replaced after the parts have been mounted on the board 8, the parts-out cassette 15A is transferred to the cassette transfer device 1.
9 to the reserve storage area P1 (Fig. 4 (B) arrow R)
At this time, the carriage 16 moves the out-of-parts cassette 15^ to a position corresponding to the spare 1L field PI and stops there. This transition I may be during the return of the carriage 16 to the original position when replacing the board 8, and after returning, the carriage 16 may be moved four times from the original position (ζ position) for attachment to the next) Is M2S. After this, parts mounting on the next board 8 is carried out with the device tJMSt still in the cassette/tray position.
When replacing the board 8, the cassette 15A' in the empty storage area S1 is replaced by the cassette transfer device 219 to the storage area SA where the original cassette 15A, which was taken out due to missing parts, was located. (Figure 4 (C)
Then, by automatic program change, the component 25 is taken out from the cassette 15A' in the original location #ASA.

That is, the carriage 16 is operated so that the original storage area SA comes to a position corresponding to the component receiving position N in the part mounting position 7D 5. Broken parts case z taken out to reserve storage P1
When the number of parts 25 remaining in the cassette 15A', which the operator takes out as appropriate, reaches a predetermined number (200 to 3001 pieces), the above-mentioned first part-out notice is given, and the above-mentioned operations are repeated. describes the case of the cassettes 15A and 15A', but other arbitrary cassettes 15a and 15
The same applies to case c (FIG. 4(A)). one board 8
If there is a parts LIJ report for two or more cassettes 15 while parts are being installed, new cassettes 15 of the same type will be placed in each spare storage area P1 to P3 for the IL of the part LIJ and all cassettes I5. Deploy. Further, when replacing one board 8, replacement of the spare storage areas P1 to P3 to empty storage areas S1 to P3 is performed sequentially.

Incidentally, as the empty storage area Sl#S of the carriage 16, empty areas may be used for all the cassettes 15 in the order of empty storage area Si, empty storage area S2, empty storage area S3. You may make it use one of the empty storage spaces 31-S3 exclusively for each.

Cassette automatic exchange is performed as described above, but according to this method, the empty storage space S of the carriage 16 is replaced before the parts 25 of the cassette 15 on the carriage 16 are cut.

~ Since a new cassette 15 is placed in S3, the parts 25 of the cassette/cassette 15 are inserted while the parts of one board 8 are being installed.
Even if the parts 25 are used up, the parts 25 can be taken out from a new cassette 15 and installation can be continued.

Therefore, when replacing the board 8, the cassette) +5 can be replaced, and the parts can be installed; i'? There is no need to stop the machine for replacing cassettes, and there is no problem of lower operating rates. Also,
Cassettes 15 placed in empty storage spaces 81 to S3 of carriage 16
The cassettes H5 are replaced with the original cassettes 15 taken out due to running out of parts, so the empty storage space S+-5r can be used in common for replacing all the cassettes H5 on the carriage 16. Therefore, it is not necessary to provide the empty storage areas 31 to S3 individually for all the cassettes 15 on the carriage, and the empty storage areas S, -S
.

The number of installations is small, that is, empty storage areas 31 to S3
The number of cassettes 15 to be installed may be equal to the number of cassettes 15 that are expected to be out of parts on one board 8, and one empty space S, -s3 may be sufficient at one location. Furthermore, since the cassettes 15 in the empty storage areas 81 to S3 are replaced to the original cassette 15 positions, the process for selecting the cassettes on the carriage 16 can be shortened. That is, when a plurality of types of parts 25 are mounted 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 carriage 16 moves. This travel time is part 1. Therefore, the cassettes/cassettes 15 are generally arranged in accordance with the order in which the parts 25 are taken out, so that the moving distance of the carriage I6 is minimized. In this case, if the retrieval of the parts 25 is changed to the empty storage areas 31 to S3, the moving distance of the carriage 16 is likely to become longer, but since the removal of the parts from the empty storage areas S, -s is temporary, An increase in loss time is avoided.

In the above embodiment, the cassette transfer device I9 is a chinoyak 36 that is movable in three axes. In that case, another cassette replacement device is used for returning the cassettes 15 from the empty storage areas S1 to S3 of the carriage 16 to the original storage area. Further, in the above embodiment, when taking out the cassette 15 out of parts from the carriage 16, the spare storage areas P, -p
.

However, it is also possible to take it out directly to another location without returning it. Further, the preliminary storage space forming table 18 may be fixed in position or may be movable in the moving direction of the carriage 16 in u'J'. If you do that, the carriage 1
The operation time for making the vacant storage areas S and -s of No. 6 correspond to the preliminary storage areas 21 to P3 can be shortened.

Effects of the Invention The automatic cassette replacement method for a component feeding device 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 rate 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 separately in this invention, Fig. 2 is a surface measurement thereof, Fig. 3 is a partially enlarged perspective view thereof, and Fig. 4 is a cassette thereof. An explanatory diagram of the automatic cassette exchange method, FIG. 5 is a procedure explanatory diagram of the automatic cassette exchange method. l...Component mounting device, 2...Component feeding W, 3...
・Base, 5... Component mounting head, 7, 8... Board,
9...XY table, 13...Component suction nozzle, l
s, +511,15A'...cassette, l fi
... ili<j unit, 18... Reserve storage area forming unit, 19
...Cassette transfer device, 51-S3...Empty storage area, P
1~P3... Reserve storage area, N... Parts receiving position Fig. 3 3P2P1 Fig. 4 (A1200-30ω solid)

Claims (1)

[Claims] A reciprocating table is placed near a component mounting device that mounts components onto a board, and has component storage cassettes lined up in a line and removably mounted thereon, and the reciprocating table is moved back and forth in the direction in which the cassettes are lined up to mount any cassette on the component. An automatic cassette replacement method applied to a parts feeding device equipped with a carriage driving device that corresponds to a parts receiving position of the device, the method comprising at least one step in which a new cassette for replacement is placed near a reciprocating path of the carriage. A transfer means capable of transferring cassettes between the preliminary storage area and the carriage is prepared; Prepare an empty storage area, and then detect that the number of parts remaining in any cassette on the carriage has reached a predetermined number and give a warning that the parts are out of stock. When replacing a board, there is a step of transferring a new cassette of the same type of component as the previously announced cassette in the preliminary storage area to the empty storage area of the carriage; A step of detecting that a part of a previously announced cassette has run out, and a subsequent operation of corresponding to the part receiving position of the carriage based on this detection from the position of the part-out cassette to a new cassette position in the empty storage area. a step of taking out the out-of-component cassette with the transfer means when the component mounting device replaces the board; and a step of removing the cassette from the empty storage space from the empty storage space during the board replacement of the component mounting device. A step of replacing the out-of-stock cassette with the original storage location, and a step of changing the subsequent operation of the carriage to correspond to the parts receiving position from the empty storage location to the position of the replaced cassette. An automatic cassette exchange method for a parts feeding device, characterized in that: