JPH03131431A - Parts supply device - Google Patents

Abstract

PURPOSE:To improve the efficiency of work by equipping a table which is movable on a track, a work station, a table exchange station and an unmanned transport device which conducts the receipt and delivery of tables from and to a positioning device. CONSTITUTION:A table 17 which supports a plurality of parts cassettes 31 and is movable on a track 20 by being connected with a positioning device 14, a work station 22 provided at part of the track 20, a table exchange station 23 and an unmanned transport device 14 which approaches the station 23 and conducts the receipt and delivery of tables 17 from and to the device 14, are equipped. And, the table 17 which has the work of supplying parts, conducts, in connection with the device 14, the supply of parts at the work station 22. When running out of parts occurs at this table 17, the positioning device 14 pulls the table 17 into the station 23 and separates it. Then, the device 19 approaches it and recovers it, and supplies an exchange table 17 completely equipped with parts as a replacement.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a component supply device in an electronic component mounting apparatus.

(0) Conventional technology As a component supply method in an electronic component mounting device, a plurality of component supply cassettes are removably arranged on one table, and by moving this table linearly, any component can be The mainstream is one in which the supply cassette is positioned at the component removal position. Also, recently, devices having a plurality of tables have been put into practical use, and an example of such a device can be found in Japanese Patent Laid-Open No. 140499/1983. This device has two tables, and while one table is supplying parts, the operator can replenish parts to the other table, making it more operational than a device with only one table. rate is increasing.

(c) Problems to be Solved by the Invention In the above-mentioned apparatus, an operator had to go to the machine and replace the parts supply cassette every time a part was cut on the table.

Furthermore, when switching between models, all the component supply cassettes may have to be replaced, and the operator has to perform troublesome work in a short period of time in order to increase the operating rate of the device.

In the present invention, it is an object of the present invention to enable the replacement work of the component supply cassette of the component supply device to be carried out efficiently and with sufficient margin.

B) Means for Solving the Problems The present invention provides a table that supports a plurality of component cassettes and can be moved on a track by being connected to a positioning device, and a work station run set on a part of the track. , a table exchange station also set on a part of the track, and an unmanned conveyance device that approaches the table exchange station and receives the table from the positioning device or delivers the table to the positioning device. nru.

(e) The table responsible for supplying working parts is connected to a positioning device and supplies parts at a work station run. When this table runs out of parts, the positioning device pulls the table into the table changing station and disconnects it. An unmanned transport device approaches here, collects the table, and supplies a replacement table complete with parts.

(f) Example An embodiment will be described based on the drawings.

FIG. 1 shows a schematic structure of an electronic component mounting apparatus 1. As shown in FIG.

The electronic component mounting device 1 includes a main frame 2 and a component mounting section 3.
, a board positioning section 4, a board transport section 5, and a component supply device 6.

The component mounting section 3 includes an index table 7 that rotates for indexing.
It is mainly composed of. At the periphery of the index table 70, the same number of component mounting heads (not shown) as the rotation speed of the periphery of the index table 70 are arranged. When the component mounting head arrives at the component take-out position Pt by rotation of the periphery of the index table 70, it takes out the electronic component from the component supply device 6, and then when it arrives at the component mounting position P2, it loads the electronic component onto the board held by the board positioning section 4. The board positioning device 4 mainly consists of an xY child table.
has been done. A pair of clamp rails 9 are arranged above the XY child table to clamp the two sides of the board.

The substrate transport section rIi5 is composed of a loader 10 and an unloader 11 arranged on both sides of the substrate positioning device 40.

Between the loader 10 and unloader 11 is a substrate positioning device 4.
It is open enough for entry and exit. The loader 10 receives a substrate from a pre-process device (not shown) and sends it to the substrate positioning device 4.

The unloader receives a board with electronic components mounted thereon from the board positioning device 4 and sends it to a device for the next process (not shown).

The component supply device 6 supplies electronic components to the component mounting section 3 at the component removal point fill, and includes a rail stand 15,
The main elements are a table 17 for supplying electronic components, a table mounting base 18 and a positioning block 16 that constitute a positioning device 14 for the table 17. Replacing the table 17, that is, replenishing and replacing electronic parts, is carried out by the unmanned transport bag @19.

Next, the configuration of the component supply device 6 will be explained in detail based on FIGS. 1 to 8.

The rail stand 15 forms the main body of the component supply device 6 and is fixed on the main frame 2. Rails 21 constituting a track 20 of the table 17 are laid on the rail stand 15 in parallel with the substrate transport section 5. A work station run 22 for the table 17 is set in the center of the track 20. Further, table changing stations 23 are set on both sides of the work station 220. Positioning block 1
6 is supported on one side by a slider 25 movable on a rail 21, and on the other side supported by a slider 27 movable on a rail 24 laid parallel to the rail 21 (Fig. 4). and Figure 5).

A feed screw 28 is arranged between the rails 21 and 26 in parallel with the rails 21 and 26, and is screwed into a nut (not shown) of the positioning block 16. A pair of bearings 29 support the feed screw 28 on the rail base 15. Feed screw 28
A motor 30 fixed to the rail stand 15 is connected to one end of the rail.

The table 17 has a plurality of component supply cassettes 31 on it.
This is a removable holding device. As shown in FIG. 2, the table 17 has n pins 32 arranged at equal intervals on both sides of its surface, and an angle member 33 arranged between the bins 32. The structure of the component supply cassette 31 is similar to that described in Japanese Unexamined Patent Publication No. 63-98199, in which electronic components are fed one by one by pitch-feeding a tape encapsulating electronic components using power transmitted from the outside. be. To attach the component supply cassette 31 to the table 17, the operator rotates the clamp lever 35 counterclockwise, which is biased clockwise in FIG. Component supply cassette 3 after making sure that the hook part does not hit the angle member 33.
A hole (not shown) formed on the lower surface of the bottle 1 is aligned with the bottle 32, and then the clamp lever 35 is returned to engage the hook portion with the angle member 33, thereby completing the process.

Reference numeral 36 denotes a bracket attached to the side end of the table 17, and a through hole 37 is formed in the projecting portion. The table 17 can be moved on a track 20 by being attached to a table mounting base 18. FIG. 3 shows the back side of the table 17. On the back of table 17,
A bin 38 that regulates the position of the table 17 when it is placed on the table mounting base 18, and three pairs of L-shaped hooks 39 that engage with clamp means, which will be described later, configured on the table mounting base 18.
is fixed.

Two table mounting stands 18 are arranged on the track 20. In FIG. 1, one table mounting base 18 has been retracted to the table exchange station 23, and the other table mounting base 18 is located at the work station 22 with the table 17 attached thereto. Since these two table mounting stands 18 have a symmetrical structure, here the table tk! is evacuated to the table exchange station 18! The structure of the TW stand 18 will be explained by taking it as an example. As seen in FIG. 4, the base 45 of the table mounting base 18 has a slider 48 on the rail 21.
Supported by Six table support plates 46A146B are fixed to the upper surface of the base 45 in a grid pattern. The table 17 is placed on the upper edge of the table support plates 46A and 46B, and the table support plate 46A is formed with a positioning hole 47 (FIG. 5) into which the bin 38 of the table 17 is fitted. . A holding means 48 for the table 17 and a connecting means 49 for connecting the positioning block 16 are formed on the upper surface of the base 45. Holding means 4
8, one bell crank 51, 52, 5 is attached to each of the three support shafts 50 vertically rising from the base 45.
3 is attached rotatably and is prevented from being pulled out with a nut 54. Vertical protrusions are provided at both ends of the two horizontally extending sides of the bell crank 51, 52, 53, and a roller 55 capable of rotating around the horizontal axis is attached to the outer surface of the first part. ing. 56 is a gear attached to the lower surface of the bell crank 53, which transmits power to the connecting means 49. One end of a connecting rod 58,59 is connected to one end of the bell crank 52 via a connecting pin 57. The connecting rod 59 crosses the alignment line of the support shaft 50, reaches the bell crank 53, and is connected to one end of the bell crank 53 via a connecting pin 60. Similarly, the connecting rod 58 crosses the arrangement line of the support shaft 50 and reaches the bell crank 51, and connects the connecting pin 6.
1 to one end of the bell crank 51. A coil spring 63 is connected to the other end of the bell crank 52 via a hook pin 62. The other end of the coil spring 63 is connected to a hook pin 64 protruding from the base 45. As a result, the bell crank 52 is biased clockwise in FIG. 5, and the bell crank 5L53 is biased counterclockwise. A support shaft 65 is attached to the other end of the bell crank 51. A bearing 66 is fixed to the base 45 and supports the sliding rod 67 in parallel with the raceway 21. One end of the sliding rod 67 is connected to the support shaft 65. A hook 68 is attached to the other end of the sliding rod 67.

In the connecting means 49, a support shaft 69 is provided upright on the base 45 adjacent to the support shaft 50 supporting the bell crank 53, and a lever 71 to which a gear 70 is fixed is rotatably mounted on the support shaft 69. The removal is stopped with Natsuto 54. The gear 70 meshes with a gear 56 fixed to the bell crank 53, and when the bell crank 53 rotates, the lever 71 rotates in the opposite direction to the bell crank 53. A portion of the lever 71 protrudes from the table mounting base 18, and a roller 72 capable of rotating around a vertical axis is attached to this end. Reference numeral 75 denotes a drive means for operating the holding means 48 at the table exchange station 23 (the drive means 75 is also arranged at the other table exchange station 23). The drive means 75 has a bracket 76 fixed to the vertical wall of the rail platform 15. A support shaft 77 projects horizontally from the bracket 76, and a bell crank 78 is rotatably mounted on this shaft, and is prevented from being removed with a nut 91. A roller 79 is attached to the upper end of the bell crank 78. 80 is an air cylinder for driving the bell crank 78, and is attached to a bracket 81 fixed to the rail base 15 via a pin 82. A cylinder 85 is attached to the tip of the sliding rod 83 of the air cylinder 80, and the lower end of the bell crank 78 is attached to this through a pin 84. 86 is a bracket attached to the rail base 15, which includes a stopper bolt 87 and a shock absorber 88.
is attached. In FIGS. 4 and 5, the roller 79 of the driving means 75 is pressed against the hook 68 of the holding means 48, and the sliding rod 67 is slid toward the end of the rail base 15, and the table mounting base 18 is placed on the stopper. It is pressed against the bolt 87. Further, the holding means 48 rotates each bell crank 51, 52, 53 by a certain angle by sliding the sliding rod 67 against the biasing force of the coil spring 63, and the lever 71 of the connecting means 49 also rotates the bell crank 530 times. It is rotated by a certain angle. When the positioning block 16 approaches the positioning block 16 on which the table 17 is placed by the unmanned conveyance device 19 and the n1 parts are to be supplied, the driving means 75 rotates the bell crank 78 clockwise [releasing the restraint of the suspension C lever 67]. The bell cranks 51, 52, 53 of the holding means 48 are rotated by the biasing force of the coil spring 63, and the roller 55 rides on the horizontal portion of the hook 39 on the lower surface of the table 17. This
As a result, the table 17 is prevented from floating up and is completely held on the table mounting base 18. At the same time, the lever 71 of the coupling means 49 rotates clockwise in FIG. 5 due to the rotation of the bell crank 53 and engages in the four portions 90 formed in the positioning block 16 (FIGS. 6 and 7). After this, the positioning block 16 pulls the table mounting base 18,
A desired component supply cassette 31 is positioned at the component removal position Pl.

Next, the unmanned transport bag @19 will be explained. The unmanned conveyance device 19 has a lift 95 installed on a self-propelled vehicle 94 that moves along a travel track tape 93 attached to the floor.

The lift 95 raises a pair of guide posts 97 from the loading platform 46 of the self-propelled vehicle 94, and supports a fork 98 thereon so as to be able to rise and fall. The upper part of the guide post 97 is the self-propelled vehicle 9
U-shaped bridge 1 installed across the loading platform 96 of 4
It is supported by 99 horizontal parts. 100 is a steel rope connected at one end to the horizontal portion of the bridge 99. Steel lobe 100 is movable pulley 1 attached to fork 98
01 and a fixed pulley 103 supported on the horizontal part of the bridge 99 via a bracket 102, which is connected to a winding drum 104 rotated by a motor (not shown) disposed on the loading platform 96. Therefore, the fork 98 moves up and down as the winding drum 104 rotates. A positioning pin 108 is attached to the upper surface of the tip of the fork 98. The table 17 is placed on the table 17 by fitting the through hole 37 into the positioning pin lO8.

Next, the operation of the unmanned conveyance device 19 to place the table 17 on the table mounting base 18 will be explained based on FIGS. 9 to 11. The self-propelled vehicle 94 approaches the table exchange station 23 while being guided by the travel track tape 93. At this time, the self-propelled vehicle 94 lifts the table 17 to a higher position than the table mounting base 18 (FIG. 9). The self-propelled vehicle 94 is stopped when the table 17 arrives directly above the table mounting base 18 (FIG. 10). Next, the self-propelled vehicle 94 lowers the fork 98 and places the table 17 on the table mounting stand 18. The fork 98 is lowered until the positioning pin 108 escapes from the through hole 37 of the table 17 (FIG. 11). Thereafter, the self-propelled vehicle 94 returns to the operation center, which will be described later.

FIG. 12 shows a part of the trajectory of the self-propelled vehicle 94. Reference numeral 115 denotes a board assembly line which includes the electronic component mounting device 1 and various peripheral devices A1B, C, and D.

It is composed of E and F. Reference numeral 116 denotes an operation center located in the middle of the operating track, in which a parts management section 117 that manages the supply of electronic components and an unmanned transportation device operation control section 118 that controls the unmanned transportation device 19 are installed. The parts management section 117 has a parts rack or a parts warehouse attached thereto.

The operator 119 replaces the component tape, replaces the component supply cassette 31, and
Alternatively, work such as replacing the table 17 itself is performed. The unmanned conveyance device operation control unit 118 controls the operation of the self-propelled vehicle 94 based on the central control device 1200 command shown in FIG. Control commands are transmitted using a well-known method.

Although FIG. 13 shows the connection configuration of each element, the central controller 120 does not control only the illustrated elements, but also controls the entire board assembly line 115 and other board assembly lines.

Next, a series of operations of the component supply device 6 will be explained based on FIGS. 14 to 18. Table 17 not involved in parts supply
A is waiting at the table exchange station 23 on the left side. The table 17B, which is to be used, supplies parts on the table mounting stand 18 which is pulled by the positioning block 16 (FIG. 14). When the table 17B is out of parts, the positioning block 16 is moved to the table 17B.
Send B to the table exchange station 23 on the right side,
Instead, it moves to the left in order to connect with table 17A, which is on standby. Operation center 11 is on table 17B.
Self-propelled vehicle 94 approaches due to guidance from 6 (1st!11
). The table mounting base 18 positioned at the table exchange station 23 has released the holding of the chiffle 17B. The self-propelled vehicle 94 moves from the table mounting base 18 to the table 1.
7B is received and transported to the operating gin center by 116 cc (Fig. 16). Another self-propelled vehicle 94 carrying a table C fully equipped with electronic components necessary for replacement approaches the table mounting base 18 (FIG. 17). After the self-propelled vehicle 94 places the table 17C on the table mounting stand 18, it is called back to the operation center 116 (v, Fig. 18).

(G) Effects of the Invention In the present invention, the component supply device receives the table from the positioning device by approaching the table exchange station;
Alternatively, by combining an unmanned transport device that transfers the table to the positioning device, even if the table runs out of parts, the operator does not have to go to the machine and replace the parts supply cassette. Therefore, parts replenishment and replacement can be performed centrally in a specific workshop, improving work efficiency.This effect becomes more pronounced as the scale of the production system increases.

[Brief explanation of the drawing]

Fig. 1 is a top view showing the schematic structure of the electronic component mounting device, Fig. 2 is a perspective view showing the structure of the front surface of the table, Fig. 3 is a perspective view showing the structure of the back side of the table, and Fig. 4 is a top view showing the structure of the table surface. FIG. 5 is a top view of the part shown in FIG. 4, and FIG. 6 is a partially sectional front view showing the table holder holding the table and connected to the positioning block. Figure 7 is a top view of the part shown in Figure 6, Figure 8 is a perspective view showing the structure of the unmanned conveyance device, and Figure 9 is a state in which a self-propelled vehicle carrying a table approaches the table mounting base. 10 and 11 are front views showing a series of operations in which the unmanned conveyance device places a table on a table mounting base, and FIG. 12 is a schematic top view showing a part of the operating trajectory of a self-propelled vehicle. 13 are block diagrams showing the connection status of each element, and FIGS. 14 to 18 are schematic top views showing a series of operations of the component supply device. 31... Parts supply cassette, 14... Positioning device, 16... Positioning block, 18... Table mounting base, 17... Table, 20... Track, 22...
- Work station, 23... Table exchange station, 19... Unmanned conveyance device.

Claims (1)

[Claims] (1) A table that supports a plurality of component supply cassettes and is movable on a track by being connected to a positioning device, and a work station that is set on a part of the track, and a work station that is also set on a part of the track. 1. A parts supply device comprising: a table exchange station; and an unmanned conveyance device that approaches the table exchange station and receives a table from the positioning device or delivers the table to the positioning device.