JPH0783199B2 - Electronic component mounting method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic component mounting method capable of mounting different kinds of electronic components on an electronic circuit board.

2. Description of the Related Art In recent years, as electronic parts have become widespread, the types of shapes and sizes have become diversified, and there has been a demand for speeding up and reliability of a device that forms an electronic circuit by combining these electronic parts.

In order to meet these demands, the conventional apparatus has a plurality of types of suction heads 34 to 36 having different nozzle structures on the periphery of an index table 37 which rotates intermittently at a predetermined angle of 45 °, as shown in FIG. The components are arranged at a predetermined angle, and the components are taken out and mounted at a predetermined temporary stop position (hereinafter referred to as a station) (for example, in FIG. 5, the parts are taken out at the position I and the parts at the position III). Mounted on the board).

Problems to be Solved by the Invention However, in the drive system shown in FIG. 5, since the rotation direction of the index table 37 and the intermittent rotation angle of 45 ° are determined, different electronic components can be mounted on the electronic component substrate. In the mounting work, all suction heads must be station I for picking up parts and station II for mounting.
Stop at I. Therefore, when the components using the suction head 34 are taken out or mounted, a time loss occurs during the time when the different suction heads 35 and 36 are stopped at these stations I and III. There was a problem.

Means for Solving the Problems In order to solve the above problems, the electronic component mounting method of the present invention comprises a plurality of suction heads arranged around a table that is intermittently rotatable at a first predetermined angle. In the electronic component mounting apparatus, an electronic component mounting method for receiving an electronic component at a predetermined component supply position by the suction head and mounting the electronic component on a printed circuit board, wherein the plurality of suction heads are at least:
A first type suction head arranged on the table in the first predetermined angle unit, and a position displaced from the first type suction head by a second predetermined angle in the rotation direction of the table. With a suction head of another type different from the suction head of the first type arranged on the table in units of a first predetermined angle with reference to the above, and an intermittent rotation operation is performed at the first predetermined angle. When the electronic components are mounted on the printed circuit board by the first type suction head and the electronic components are mounted on the printed circuit board by the second type suction head by continuing the operation, After the table is moved by a predetermined angle of 2, the intermittent rotation operation is continued at the first predetermined angle.

According to the present invention, even if a plurality of types of suction heads having different nozzle structures are arranged on the periphery of the index table by the above method, the same type suction is performed in each station by performing the intermittent rotation operation at the first predetermined angle. When the head stops, and when switching to a different suction head, by moving different suction heads for each index table until they match the desired station positions, the intermittent rotation operation at the first angle is performed again. The suction heads of the same kind can always be positioned at each station, and the loss due to the stop of the unused suction nozzles, which was conventionally used, can be eliminated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 44 is a DC motor of the unit base 21 and 38 fixed guides. In the fixed guide 38,
An index shaft 46, to which the index table 19 is fixed, is provided at the lower end thereof, and the rotation of the DC motor 21 is transmitted via a gear 45 so that the DC motor 21 is intermittently rotated by 90 ° about its axis. A total of eight suction heads 1 to 45 around the index table 19 at 45 ° intervals.
8 is attached. Each of the suction heads 1 to 8 is constructed so as to be movable within a fixed guide of 20 by a fixed stroke, and is normally in a raised position by the biasing force of a spring. 22 pins are suction nozzles 1 to 8 as shown in FIG.
It is attached to and fixed in the groove of the fixed guide 20 to prevent rotation. In FIG. 1, 43 is a rotary joint, and the air tube 42 is an index shaft.
Prevents twisting when connecting to 46. Rotary joint 43
The air passage is connected to a radial air passage formed inside the joint 32 through the hollow portion 39 of the index shaft 46 as shown in FIGS.

In FIG. 3, the air passage radially from the joint 32 is connected to the mechanical valve 23 via the tube 25, and further connected to the suction heads 1 to 8 via the tube 24 to exert a vacuum pressure. . Further, the passage 40 of the fixed guide 38 is connected to the exhaust path of each mechanical valve 23 via the air passage formed in the index table 19, and the exhaust state is generated by the operation of the switching pin 33 in the mechanical valve.

The suction heads 1 to 8 are divided into two types according to the shape of the nozzle formed at the lower end thereof.
5 and 7 are nozzles for small parts / cylindrical parts for sucking and holding flat small parts (hereinafter, small parts) and cylindrical parts.
The suction heads 2, 4, 6, 8 are provided with a large component nozzle suction nozzle 17 and a chuck 16 for sucking and holding a large planar component (hereinafter, large component).

These two types of suction heads are alternately arranged at intervals of 45 ° with respect to the index table 19 which rotates intermittently by 90 °, as shown in FIG. Therefore, the suction head of the same type always stops at the stop position (hereinafter referred to as a station) at the time of intermittent rotation of the normal index table 19 at intervals of 90 °. In this embodiment, the suction head is pushed by the pressing member 31 and descends when it is stopped at the station III in FIG. 4 to suck an electronic component (this position is referred to as a component take-out position), and the station I is pressed when stopped. The component is mounted by mounting the electronic component on the board by descending again by 30 (this position is referred to as component mounting position).

Here, the component supplying operation to the component taking-out position will be briefly described with reference to FIG. Reference numeral 14 denotes a component supply unit. Each component supply unit 14 holds a plurality of electronic components of the same type (small component 9, large component 10, or cylindrical component 11) in a row, and an arrow B by a drive source (not shown). By moving the electronic component in the direction, the electronic component is positioned at a predetermined position on the component supply unit. Then, a plurality of component supply units holding electronic components of each type are placed on a Z table 41 configured to be movable and positionable in the direction of arrow A by a drive source (not shown). By moving the Z table in the A direction so that the predetermined position of the held component supply unit coincides with the component take-out position, the pick-up operation of the electronic component by the suction head is performed.

Next, the component mounting operation at the component mounting position will be briefly described. The component board 15 is held on an XY table 18 which can be moved and positioned in a B direction perpendicular to the A direction and a C direction parallel to the A direction. Therefore, the component mounting operation is performed by moving the XY table so that the desired mounting position on the substrate coincides with the component mounting position.

Next, the operation of the present embodiment configured as above will be described.

First, when the small-sized component 9 or the cylindrical component 11 is mounted, the index table 19 is intermittently rotated at 90 °, which is the first predetermined angle, so that only the suction heads 1, 3, 5, and 7 are station I and Stop at station III, heads 2, 4, 6, 8 with different types of nozzles do not stop. By the switching pin 33 of the mechanical valve 23, when the parts are picked up at the station I, they are moved to the station II in the picking direction.
The air pressure path is switched in the exhaust direction during the component mounting at I, and the components are not pulled up together even if the suction head is raised after the components are mounted on the component substrate 15.

Next, when all the small parts 9 and the cylindrical part 11 are mounted and then the large part 10 is mounted, first, the suction head 2,
After moving the index table 19 by the second predetermined angle of 45 ° by the DC motor 21 so that 4, 6, 8 are stopped at the station I and the station III, the first predetermined angle of 90 ° is again obtained. The intermittent rotation operation of each is performed. After that, the large component 10 is mounted on the component substrate 15 by the same operation as the above-described operation by the suction nozzles 1, 3, 5, 7.

EFFECTS OF THE INVENTION As described above, according to the present invention, the suction head of the first type arranged on the table in the first predetermined angle unit and the rotation direction of the table with respect to the suction head of the first type. A suction head of another type different from the suction head of the first type arranged on the table in units of a first predetermined angle with reference to a position shifted by a second predetermined angle. By continuing the intermittent rotation operation at a predetermined angle of 1, the electronic component is mounted on the printed board by the first type suction head, and the electronic component is printed by the second type suction head. In the case of mounting on the above, after moving the table by the second predetermined angle, the first table is moved.
By adopting the method in which the intermittent operation is continued at a predetermined angle, it is possible to deal with a wide variety of parts by using a suction head having a nozzle having a structure according to the shape of the part.

Further, in the conventional method, since the index table only intermittently rotates at a predetermined angle, a suction head that is not used has a loss time in which the suction head is temporarily stopped at the component pick-up position or the component mounting position. Since only the suction head used is stopped at those positions, it is possible to reduce the time required to mount components and produce a board.

[Brief description of drawings]

FIG. 1 is a perspective view of a component mounting apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of the shield, FIG. 3 is a sectional view of the same, and FIG.
FIG. 5 is a plan view of the same, and FIG. 5 is a plan view of a conventional component mounting apparatus. 1-8 ... Suction head, 14 ... Parts supply unit, 18 ...
… XY table, 19 …… Index table, 21 …… DC
...... Motor, 41 …… Z table

Front page continuation (72) Inventor Tsutomu Inukai 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Reference: Shokai 59-95700 (JP, U)

Claims (1)

[Claims] 1. An electronic component mounting apparatus in which a plurality of suction heads are arranged around a table which can be intermittently rotated at a first predetermined angle, wherein an electronic component is placed at a predetermined component supply position by the suction head. An electronic component mounting method for mounting on a receiving printed circuit board, wherein the plurality of suction heads include at least a first type suction head arranged in the table in the first predetermined angle unit, With respect to the first type suction head, the first type suction head arranged on the table in a first predetermined angle unit with reference to a position displaced by a second predetermined angle in the rotation direction of the table. And a different type of suction head, and by continuing the intermittent rotation operation at the first predetermined angle, an electronic component is mounted on a printed circuit board by the first type of suction head. When mounting the electronic component on the printed circuit board by the second type suction head, the table is moved by the second predetermined angle, and then the intermittent rotation operation is continued at the first predetermined angle. An electronic component mounting method characterized by being performed.