JPH02132893A - Component feeding device - Google Patents

Abstract

PURPOSE:To enable a component feeder to operate safely and stably so as to improve it in reliability by a method wherein a component feeding table not engaged in the feeding of components is made to be on standby at a standby position and taken out being connected with a tractor and positioned at a station as occasion demands. CONSTITUTION:When a component cassette of a component feed table 18A runs short of components or components provided only on the feeding table 18A are required to be mounted, the table 18A is instantly moved to a standby position 47, and a separator cuts off the connection between the table 18A and a tractor 17. Next, the tractor 17 is moved to the standby position 48 by a feed screw 23, and the air cylinder rod of the separator is made to ascend to enable a connector to be released, and a roller is put in the recess of the tractor 17 to make the tractor 17 connected with the table 18A. Thus, the suspended feed of components is made to restart. During this period, components are supplied to a component cassette on the table 18A to make the cassette ready for a following operation. By this setup, a component feed is safely and surely executed, and a component feeder of this design can be protected from troubles and consequently improved in reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a component supply device that supplies small components such as chip-shaped electronic components to a component removal means such as a suction shaft.

(B) Conventional Technology Various devices have been put into practical use as component supply devices for electronic component mounting devices.

In recent years, electronic component supply tapes containing multiple electronic components at equal intervals have been attached in a replaceable manner, and multiple component cassettes have been lined up on a single component supply table by feeding the tape in pitches. The mainstream of this type of apparatus is a configuration in which an arbitrary component cassette is positioned at a component removal position by moving a component supply table. An example of such a configuration can be found in Japanese Unexamined Patent Publication No. 148393/1983. In this example, one device is provided with only one component supply table, but there is also an example in which one device is provided with a plurality of component supply tables. This is the device described in Japanese Patent Application Laid-Open No. 6'2-140499. If multiple parts supply tables are provided in this way, it becomes possible to replenish parts to other parts supply tables while one parts supply table is in use. There is no need to suspend operations, improving operating rates. However, in this example, an independent drive means was provided for each component supply table, which resulted in high cost.

(c) Problems to be Solved by the Invention The present invention simplifies the configuration of the component supply table driving means in a component supply device that alternately uses a plurality of component supply tables, and ensures safe and reliable operation. The purpose is to

(d) Means for Solving the Problems In the present invention, a plurality of component supply tables on which component cassettes are lined up are arranged in a mobile i-process on each track. Along the tracks of these component supply tables, a moving path for a pulling body driven by a power source is provided.

A connecting device for self-maintaining the connected state is provided between this pulling body and each component supply table. A waiting area for a component supply table that is not involved in component supply is set in a part of the trajectory of the component supply table. A disconnecting device for the connecting device is arranged on this standby.

(e) Parts supply tables that are not involved in the supply of working parts are placed on standby in the waiting area. The parts supply table that is to be used moves in conjunction with the towing body, and positions the required parts cassette at the parts removal station. When it becomes necessary to switch to another component supply table, the towing body transports the connected component supply table to a predetermined waiting area. At this point, the disconnection means disconnects the traction body from the component supply table, and the traction body leaves the part supply table behind. The traction body approaches the parts supplying table to be used next and connects thereto, and starts moving and positioning the parts supply table anew. Regarding the parts supply table that is currently closed,
The parts cassette is replaced using this period.

(f) Example An example will be described based on the drawings. In FIG. 1, reference numeral 1 denotes an electronic device mounting device embodying the present invention, including a main frame 2, a board transport device fl! ．． 3. The main components are a hook-and-place device 4 and an electronic component supply device 10. The board transfer device 3 receives the board from a loading device (not shown), carries it to a board positioning section provided in the center, and sequentially moves the component mounting points of the board to the component mounting position using an XY table (not shown) that forms the main body of the board positioning section. When the mounting of components by the pick-and-place device 4 is completed, the board is released from the restraints and sent to an unloading device (not shown).

What is shown in FIG. 1 is near the exit of the substrate transport device 3.

The big-and-place device 4 has a plurality of component mounting heads 5 (only one is shown in FIG. 1) supported on the periphery of a rotary index table (not shown) so as to be movable up and down. The rotary index table is indexed by the number of component mounting heads 5, and when the component mounting head 5 arrives at the component removal and polishing station 6, the component mounting head 5 surprises the component and attaches the component. When the parts arrive at the station, they are pressed against the board.

Next, the structure of the electronic component supply device 10 will be explained based on FIGS. 2 to 6. The electronic component supply device 10 is constructed based on an elongated frame 12 having an L-shaped cross section and fixed to the rear part of the main frame 2. Both ends of the frame 12 slightly protrude from the main frame 2. A rail 13 having the same length as the width of the main frame 2 is laid on the upper surface of the frame 12. This rail 13
, together with the rail 14 laid directly on the main frame 2, constitutes the track 15 of the county goods supply table, and five sliders 16 are attached to the moving machine, one of which is connected to the traction body 17. However, the remaining four pieces (not shown) are fixed two at a time to both ends of the lower surfaces of the component supply tables 18A and 18B, making the crystal supply tables 18A and '18B movable. Five sliders 19 are similarly attached to the rail 14, and play the role of supporting the traction piece 17 and the component supply tables 18A, 18B. Here, the track 15 also serves as a travel path for the traction rod 17. The component supply tables 18A and 18B have a plurality of component cassettes 11 removably arranged along the track 15 on their upper surfaces. Although the component cassette 11 is depicted in FIG. 1 as being of a type that feeds out taped components one pitch at a time, it may be of this type. The component supply tables 18A, 18B are connected to the towing body 17 by a connecting device 21, which is based on a side plate 20 attached to the lower surface of the table.
It moves with the

The traction bale 17 is provided with a nut 22 therein, the nut 22 is screwed onto a feed screw 23 disposed along the track 15, and the nut 22 is moved by rotation of the feed screw 23. The feed screw 23 has a pulley 24 attached to one end and is supported near both ends by bearing blocks 25, and a belt 26 wound around the pulley 24 is driven by a stepping motor (not shown) as a power source. By doing this, rotation can be given. The connecting device 21 has four bell cranks rotatably arranged on the side plates 20 of each of the component supply tables 18A and 18B, and these four bell cranks are connected by a connecting member, so that one bell crank rotates. When the bell crank moves, the other three bell cranks also rotate. r4FT The four bell cranks are a first bell crank 27, a second bell crank 28, and a third bell crank 2 from the right end of the side plate 20 in FIG.
9 and the fourth bell crank 30. The four bell cranks 27, 28, 29, and 30 each have a bearing 3l at the center of rotation, and a support shaft 32 whose root flange is attached to the side plate 20 fits into the bearing 31, and is rotated by a nut 33. Prevents the bell crank from slipping out.

The first bell crank 27 is operated by a disconnecting device 49, which will be described later, and is provided with a cutout 34 at one end, and the other end is connected to one end of the second bell crank 28 by a first connecting rod 35. It is connected to. The other end of the second bell crank 28 is connected to one end of the third bell crank a9M via a link 36. Link 36 is connected to second and third bell cranks 28, 29 by pins 37, 38.

The other end of the third bell crank 29 is connected to one end of the fourth bell crank 30 via a second connecting rod 39. Second bell crank 28 and first connecting rod 3
The connection point 5 is connected to a bin 40 (see FIGS. 3 and 4) protruding from the side plate 20 by a tension panel 41.

Therefore, the second bell crank 28 (and the first bell crank 27) is always given a rotational force in the clockwise direction as shown in FIG. will be energized. 42 is a stopper block fixed to the side plate 20, and an adjustment screw 43
This adjustment screw 43 allows the second bell crank 2
8 is stopped at a certain angle. A roller 44 is attached to the fourth bell crank 30.

The roller 44 is connected to the connecting block 4 attached to the towing body l7.
It enters into the recess 46 of No. 5 and creates a connection between the traction shaft 17 and the parts supply table 18A. As described above, the tension spring 41 provides a counterclockwise rotational force to the pel crank 30 to keep the roller 44 always in the recess 46 of the connecting block 45. Therefore, the connecting device 21 The connection with the pulling body 17 is self-maintained.The connection device 21 provided on the component supply tape/L/18B has a configuration symmetrical to the connection device 2l for the component supply table 18A. Both ends of the frame 12 serve as waiting areas 47 and 48 for the component supply tables 18A and 18B, and a separating device 49 is arranged here.The structure of the separating device 49 is as follows.First, an air cylinder 50 is installed at the end of the frame 12. is arranged vertically, and a knuckle joint 52 is attached to the upper part of the rod 5l of this air cylinder 50. Reference numeral 53 denotes an operating lever, which holds a bearing 54 at approximately the center position. is attached, and a support shaft 56 is attached to this holding stand 55 by the flange part of the root tree, and this support shaft 5
6 fits the bearing 54 and supports the operating lever 53 on the rotatable part. A roller 57 is attached to one end of the operating lever 53, and the other end fits into the forked portion of the knuckle joint 52, with a knuckle pin 58 passing through and connecting the two. The air cylinder 50 normally maintains a state in which the rod 51 is protruded, and accordingly, the operating lever 53 maintains a state in which the roller 57 is lowered (see FIGS. 2 and 5).

59 is a pull 1 that prevents the parts supply table 18A from going too far.
A similar shock absorber 59 is also provided for 8B. The operation of the coupling device 21 is as follows. The pulling body 17 pulls either the goods supply table 18A or IgB to the waiting area 47 or 48 (at this time, the separating device 49 is in a state where the roller 57 is lowered as shown in FIG. 5,
The first bell crank 27 of the coupling device 21 is mounted on the roller 57.
II7 1iP). At this point, the disconnection device 49 works, and the air cylinder 50 separates from the rod 51.
is retracted, and the roller 57 of the operation lever 53 is connected to the coupling device 2.
Rotate the first bell crank 27 of No. 1 counterclockwise (
(See Figure 6). Along with this, the second bell crank 28, third bell crank 29, and fourth bell crank 30 also rotate, and the roller 44 of the fourth bell crank 30 escapes from the four parts 46 of the connecting block 45 of the traction piece 17. The towing cup l7 becomes free.

(See Figure 4).

Next, the series of operations of the parts supply device 1O is performed from the seventh to the first
This will be explained based on Figure 0. In FIG. 7, the parts supply table 18A is being pulled by the pulling body 17 and is performing parts supply work. Part power set of parts supply table 18A}
11 is out of parts, or when it becomes necessary to mount a part that is only available on the parts supply table 18B,
The parts supply table 18A is immediately moved to the waiting area 47 (FIG. 8). At this point, a disconnection device 49 in the waiting area 47 disconnects the component supply table 18A from the pulling body 17. The pulling body 17 moves toward the waiting area 48 for connection with the component supply table 18B (FIG. 9). The component supply table 18B is waiting for the pulling body 17 with the roller 44 raised. When the towing body 17 arrives at the waiting area 48, the cut-off position 49 of the waiting area 48 raises the rod 5l of the air cylinder 50 to release the coupling device 21. As a result, the roller 44 enters into the four parts 46 of the pulling body 17, and the pulling body 17 and the component supply table 18B are connected.

Thereafter, the interrupted component supply is resumed using the component supply table 18B (see Figure 10). During this time, on the supply table 18A, the parts cassette 1
The parts cassette 11 is replenished with parts or the parts cassette 11 itself is replaced in preparation for next use.

(g) Effects of the invention Conventionally, in a component supply device having a plurality of component supply tables, each component supply table had an independent moving means, but in the present invention, each component supply table has a single pulling body. A moving means can be configured, and the cost of the device can be reduced. In addition, since the traction body and the parts supply table are connected by a self-retaining mechanical coupling device rather than a pneumatic or electric type device that requires a power supply, the traction body and the parts supply table are This prevents troubles such as air hoses and electrical wiring breaking, resulting in a highly reliable device.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an electronic component mounting device incorporating the device of the present invention, and FIG. 2 is a main part of the component supply device. Figure 4 is a side view showing the operation of the coupling device, Figures 5 and 6 are side views showing the operation of the separating device, and Figure 7 10 to 10 are schematic top views showing a series of operations of the parts supply device. 18A, 18B... Component supply table, 15... Track, 11... Component cassette, 6... Component removal Station, 17... Traction body ■, 21... Connection device, 47, 48... Waiting area, 49... Disconnection device.

Claims (1)

[Claims] (1) A plurality of component cassettes are arranged on a component supply table that moves on an orbit, and an arbitrary component cassette is positioned at a component supply station by moving the component supply table, in which a plurality of the component supply tables are arranged,
Along the tracks of these parts supply tables, a moving path of a pulling body driven by a power source is set, and a coupling device for self-maintaining the connected state is provided between this pulling body and each parts supply table, and on the other hand, the said track A part supplying device is provided with a waiting area in which a component supplying table that does not participate in component supplying at that time is parked, and a disconnecting device for the coupling device is disposed in this waiting area.