JPH07144724A - Parts supply mechanism of electronic parts mounting device - Google Patents

Abstract

PURPOSE:To supply electronic parts smoothly and securely by forming a plurality of gas exhaust nozzles connected to a gas supply source at a fixed interval on a top face of a chuter section and floating electronic parts by gas which is jetted on the top face of the chuter section from the gas exhaust nozzles. CONSTITUTION:A parts supply mechanism which is provided in a parts mounting mechanism which mounts an electronic part P on a predetermined position of a printed wiring board on a conveyor section crosses the conveyor section of the parts mounting mechanism at a right angle and has a stock section 8 which tilts forward toward the conveyor section side to feed out the part P in the stock section 8 to a part supply station via a chuter section 9. The chuter section 9 forms an air passage 15 to which an air supply source is connected along a central line in the inside of a base section 11 and air exhaust nozzles 16 at a fixed interval along an axial line of a slide section 12 in the upper section of the chuter section 9 on a top face of the slide section 1<2>. Consequently, parts PP are floated and slid by air pressure which is jetted from the exhaust nozzles 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus suitable for stably and reliably supplying an electronic component to be mounted when the electronic component mounting apparatus mounts the electronic component on a circuit board. The present invention relates to a parts supply mechanism.

[0002]

2. Description of the Related Art Generally, a mounting board constituting an electronic circuit has various electronic parts such as an integrated circuit (IC), a chip capacitor and a chip resistor mounted on the circuit board, and then a terminal electrode or a lead of these electronic parts. It is configured by soldering the (leg) and the wiring on the circuit board. When mounting an electronic component on a circuit board, in a lead-type electronic component having a lead, the lead of the electronic component is inserted into a through hole formed on the circuit board,
After that, the leads protruding vertically downward from the lower surface side of the circuit board are clinched (bent). Further, in a leadless type electronic component having no lead, the electronic component is placed at a predetermined position on the circuit board, and the terminal electrode of the electronic component and the wiring formed on the circuit board are reflow-soldered (for example, Electronic components are mounted by connecting and fixing using cream solder or the like).

Conventionally, in order to mount electronic components on a circuit board in this manner, an automatically controlled electronic component mounting apparatus such as a robot is often used. Such an electronic component mounting apparatus, a transport track for transporting the circuit board, a component supply mechanism for supplying the electronic component to be mounted to a fixed position on the side of the transport track, gripping the supplied electronic component, A component mounting mechanism for mounting this on a predetermined position (position to be mounted) on the circuit board is provided.

The component supply mechanism includes a stock unit for holding a stick-shaped (cylindrical) storage case, in which a plurality of electronic components such as ICs are stored in an aligned state, by inclining forward toward the transport path. The stocker has a structure in which a lower end portion of the stock portion and a continuous shooter portion are provided. In this component supply mechanism, the electronic components in the storage case held by the stock unit slide down on the upper surface of the shooter unit and reach the lower end of the shooter unit. As such a component supply mechanism, there is a structure in which the electronic component located at the lower end of the shooter portion is directly grasped and taken out by the component mounting mechanism. In such a configuration, the lower end portion of the shooter portion is located at a fixed position laterally of the transport track. In addition, there is also a configuration in which a reciprocating supply table is provided between the lower end of the shooter portion and a certain position on the side of the transfer track. In the component supply mechanism including such a supply base, electronic components are transferred from the lower end of the shooter portion onto the supply base, the supply base is moved to the predetermined position, and the electronic components on the supply base are moved to this position. It is designed to be grasped and taken out by the mounting mechanism. In any of the above cases, when one part located at the lower end of the shooter part is taken out, the next part located above the taken out part slides down to the lower end of the shooter part.

[0005]

However, the component supply mechanism of the conventional electronic component mounting apparatus as described above has the following problems.
There are the following problems. That is, when the electronic component slides down the shooter portion, the lower surface of the electronic component,
A frictional force is generated between the upper surface of the shooter section. Especially I
In a flat plate-shaped electronic component such as C, the frictional force greatly affects the electronic component, and the electronic component may be caught in the middle of the shooter portion. Then, of course, the electronic component mounting apparatus stops, the operating rate of the apparatus decreases, and
There is a problem that personnel is required for the treatment of this stop, and the personnel cost is increased. In order to reduce the frictional force between the electronic components and the shooter section against such problems, the top surface of the shooter section should be polished or the top surface of the shooter section should be subjected to surface treatment such as plating. There is a method to reduce the friction coefficient. But,
A great deal of cost is required to polish the upper surface of the shooter portion. In addition, even if the surface treatment is performed, there is a problem that the cost is also high and that the surface-treated portion is worn due to friction with the electronic component over time. The reality was that it was not effective in solving the problem. The present invention has been made in view of the above points, and an electronic device capable of stably and reliably supplying an electronic component without catching the electronic component in the shooter portion and improving the operating rate of the device. An object is to provide a component supply mechanism for a component mounting apparatus.

[0006]

According to the present invention, there is provided a transport track for transporting a circuit board in one direction, a component supply mechanism for supplying an electronic component to be mounted to a fixed position lateral to the transport track, A component supply mechanism of an electronic component mounting apparatus, comprising: a component mounting mechanism that grips an electronic component supplied at a fixed position and mounts the electronic component at a predetermined position on the circuit board. A stock portion for holding a stick-shaped storage case, in which a plurality of the components are aligned and stored inside, is provided on the side of the transportation track toward the transportation track, and an end of the stock portion on the transportation track side is provided. A shooter part that slides out the parts in the storage case along the upper surface thereof and sends them out, and the upper surface of the shooter part is connected to a gas supply source. Exits at regular intervals It is characterized by being formed with a plurality.

[0007]

In the component supply mechanism of the electronic component mounting apparatus of the present invention, a plurality of gas ejection ports connected to the gas supply source are formed on the upper surface of the shooter portion at regular intervals. As a result, when gas is supplied from the gas supply source, the gas is ejected from the gas ejection port onto the upper surface of the shooter portion, so that the electronic components that slide down the shooter portion are lifted, and the frictional force between the electronic component and the shooter portion is reduced. It

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. 1 to 4 show an example of an electronic component mounting apparatus to which a component supply mechanism of the electronic component mounting apparatus according to the present invention is applied. As shown in FIGS. 1 and 2,
Electronic component mounting apparatus (hereinafter abbreviated as "mounting apparatus") 1
Is a base 2 and a conveyor unit (provided on the base 2 for carrying a printed circuit board (circuit board) Z in a carrying direction M (see FIG. 2, a direction orthogonal to the paper surface in FIG. 1) ( (Conveyance track) 3, a component supply mechanism 4 provided on the side of the conveyor unit 3, and an electronic component (hereinafter abbreviated as “component”) from the component supply mechanism 4 and receives the component.
The component mounting mechanism 5 for mounting at a predetermined position on the upper printed circuit board Z is a main component.

The conveyor section 3 is provided with parallel rails 6 and 6 extending in the horizontal direction on the base 2.
Both ends of the printed circuit board Z are held by the rails 6 and 6 and transported in the transport direction M (see FIG. 2).

The component supply mechanism 4 is a component supply station 7 disposed on the side of the conveyor unit 3 and a stock unit which is orthogonal to the conveyor unit 3 in a plan view and is inclined forward toward the conveyor unit 3 side. 8 and a shooter unit 9 for feeding the components from the stock unit 8 to the component supply station 7 one by one.

The component supply station 7 is provided with a base member 7a which is movable between a position below the shooter unit 9 and a predetermined position S on the side of the conveyor unit 3 (a fixed position on the side of the transfer track) S. ing. The base member 7a is adapted to receive the components sent from the lower end of the shooter unit 9 and move them to a predetermined position S on the side of the conveyor unit 3.

The stock section 8 is of a so-called stick feeder type, and stocks a plurality of stick-shaped cases (storage cases) 10 in which a large number of parts are stored.
The parts stored in the case 10 from the shooter section 9 to 1
The parts are sent to the parts supply station 7 one by one.

As shown in FIGS. 3 and 4, the shooter portion 9 extending in one direction continuously from the lower end of the stock portion 8 (see FIG. 3) is composed of a base portion 11 and a sliding portion 12 and is viewed in cross section. The component P has a substantially convex shape, and the component P slides on the upper surface 12a of the sliding portion 12. At the lower end of the shooter portion 9, a stopper plate 13 located in a plane orthogonal to its axis is attached. Further, a pressing plate 14 having an L-shaped cross section is attached to the shooter portion 9 in order to prevent the component P on the sliding portion 12 from jumping upward. As shown in FIG. 4, the widthwise dimension of the sliding portion 12 is such that the main body B of the component P is supported on the upper surface 12a of the sliding portion 12, and the leads L, L on both sides thereof straddle the sliding portion 12. It is set to be in a state.

As shown in FIGS. 3 and 4, an air passage 15 is formed inside the base portion 11 of the shooter portion 9 along the central axis thereof.
For example, an unillustrated air supply source (gas supply source) such as an air compressor or factory air is connected. On the upper surface of the sliding portion 12, air jets (gas jets) 16, 16, ... Are formed at regular intervals along the axis thereof. Each of these air ejection ports 16 is configured to communicate with the air passage 15. As a result, when air (gas) is supplied from an air supply source (not shown), air is ejected from each air ejection port 16 via the air passage 15. As shown in FIG. 2, the mounting apparatus 1 mounts different types of components on the printed board Z.
Two sets of component supply mechanisms 4 having the same configuration are provided.

As shown in FIGS. 1 and 2, the component mounting mechanism 5 has the following structure. On the base 2, along the transport direction M of the conveyor unit 3 (see FIG. 2), the guide rails 21 and 21 and the drive motor 2 are provided.
A ball screw 22 having 2a (see FIG. 1) is provided. A slide base 23 having a U-shape in a side view is movably provided on the guide rails 21 and 21, and the slide base 23 rotationally drives the ball screw 22 by a drive motor 22a (see FIG. 1). And is configured to move along the transport direction M. As shown in FIG. 1, a pair of guide rails 24 (only one of which is shown) and a ball screw 25 extending in the horizontal direction orthogonal to the transport direction M are provided on the slide table 23. There is. A chuck mechanism 26, which is provided with a vertically expandable cylinder 26a for holding components, is provided movably along the guide rail 24 and the ball screw 25. On the other hand, a pair of guide rails 27 (only one of which is shown) and a ball screw 28 are similarly provided below the slide table 23. Then, the clinch mechanism 2 for clinching (bending and bending) the leads of the parts
9 is movably provided along the guide rail 27 and the ball screw 28. The ball screw 25 is provided with a drive motor 30, and the ball screw 28 is connected to the ball screw 25 by a timing belt 31 so that the ball screws 25 and 28 rotate in synchronization. As a result, when the drive motor 30 rotationally drives the ball screws 25 and 28, the chuck mechanism 2
6 and the clinch mechanism 29 are vertically opposed to each other,
It is configured to move in a direction orthogonal to the transport direction M. With such a configuration, the chuck mechanism 26 of the component mounting mechanism 5 is movable in two orthogonal directions in the horizontal plane and the vertical direction, and the clinch mechanism 29 is movable in two orthogonal directions in the horizontal plane. There is.

Next, the operation when the component P is mounted on the printed circuit board Z using the mounting apparatus 1 having the above-mentioned structure will be described. All the operations of the mounting apparatus 1 described below are sequence-controlled by a control device (not shown).

At the same time when the mounting apparatus 1 is started, air is supplied from an air supply source (not shown) so that air of appropriate pressure is ejected from each air ejection port 16.

To mount on the printed circuit board Z by the mounting apparatus 1 shown in FIGS. 1 and 2, first, the case 10 is set in the stock section 8. Then, as shown in FIG. 3, the parts P, P, ... Inside the case 10 slide on the upper surface 12a of the sliding part 12 of the shooter part 9, and the leading part P1 is placed on the stopper plate 13 at the lower end of the shooter part 9. Abut and stop. At this time, the succeeding part P also slides down along the sliding portion 12 of the shooter portion 9 in the same manner. At this time, since air is ejected from each air ejection port 16 on the upper surface 12a of the sliding part 12, each part P that slides down floats from the upper surface 12a of the sliding part 12, and the lower surface of the main body B of each part P and the sliding part 12 are separated. Almost no friction with the upper surface 12a of the. As a result, each part P smoothly slides down without being caught on the sliding portion 12.

When the leading part P1 reaches the stopper plate 13, the part P1 is transferred onto the base member 7a of the part supply station 7 shown in FIG. Then, the base member 7a is moved to a predetermined position S on the side of the conveyor unit 3. In this way, when the leading part P1 is taken out from the sliding part 12 of the shooter part 7, the succeeding parts P, P, ... Slip down the sliding part 12 and the same state as in FIG. Also at this time, as in the above case, the air is ejected from the air ejection port 16, so that each component P slides down without being caught by the sliding portion 12.

On the other hand, in parallel with the above operation, the chuck mechanism 26 of the component mounting mechanism 5 is moved vertically above the base member 7a which has moved to the predetermined position S on the side of the conveyor section 3. Then, when the base member 7a reaches the predetermined position S, the chuck mechanism 26 is lowered to grip a component (not shown) on the base member 7a. After that, the chuck mechanism 26 is moved to a predetermined position on the printed circuit board Z positioned on the rails 6 and 6 of the conveyor unit 3, that is, vertically above the mounting position. And
The chuck mechanism 26 is lowered to move the leads L, L,
(See FIGS. 3 and 4) are inserted into predetermined through holes (not shown) of the printed board Z. At the same time, below the printed board Z, the leads L, L, ... (FIGS. 3 and 4) inserted by the clinch mechanism 29 interlocking with the chuck mechanism 26 are inserted.
The mounting of the component P is completed by clinching (bending) (see).

As described above, in the component supply mechanism 4 of the mounting apparatus 1, the air discharge ports 16, 16, ... Connected to the air supply source (not shown) are formed on the upper surface of the shooter portion 9. Has been done. As a result, when air is supplied from an air supply source (not shown), the air jets 16, 16,
Since the air spouts from the upper surface 12a of the sliding part 12,
The component P that slides down the shooter portion 9 floats up, and the frictional force between the electronic component P and the upper surface 12a of the sliding portion 12 of the shooter portion 9 is reduced. As a result, the component P can be smoothly slipped off without being caught on the sliding portion 12, and the component P can be stably and reliably supplied. As a result, it is possible to improve the operating rate of the mounting apparatus 1 by eliminating the stoppage of the device due to the part P being caught by the shooter unit 9, and the personnel for the stop treatment is not required, which reduces the personnel cost. can do.

In the above embodiment, the air jet 1
Although air is ejected from 6 in this embodiment, the invention is not limited to this. For example, when mounting the component P by filling another gas in the mounting apparatus 1 for reasons such as quality control, Other gas may be ejected. Further, although the component supply mechanism 4 is configured to be tilted forward toward the conveyor unit 3, even when the component supply mechanism 4 is installed in a horizontal state, the same effect can be obtained by applying the above configuration. . Further, needless to say, the configuration of the mounting apparatus 1 is not limited to the configuration shown in the above-described embodiment, and for example, the component supply station 7
Is eliminated, and the component mounting mechanism 5 is provided with a rotatable arm so that the component located at the lower end of the shooter unit 9 is directly gripped, the shooter unit 9 has the same configuration as described above. By setting the above, the same effect can be obtained.

[0023]

As described above, according to the component supply mechanism of the electronic component mounting apparatus of the present invention, a plurality of gas ejection ports connected to the gas supply source are formed on the upper surface of the shooter portion at regular intervals. And As a result, when gas is supplied from the gas supply source, the gas is ejected from the gas ejection port onto the upper surface of the shooter portion, so that the electronic components that slide down the shooter portion are lifted, and the frictional force between the electronic component and the shooter portion is reduced. It As a result, the electronic component can be smoothly slipped off without being caught by the shooter portion, and the electronic component can be reliably supplied. As a result, it is possible to eliminate the stoppage of the device due to the electronic parts being caught in the shooter part, and to improve the operating rate of the electronic part mounting device. Moreover, the personnel for the stop treatment is not required, and the personnel cost is reduced. can do.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a mounting apparatus to which a component supply mechanism of an electronic component mounting apparatus according to the present invention is applied.

FIG. 2 is a plan view of the mounting apparatus.

FIG. 3 is a side view showing a part of a component supply mechanism of the mounting apparatus.

FIG. 4 is a sectional view of the same component supply mechanism in the axial direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting device (electronic component mounting device) 3 Conveyor part (conveyance track) 4 Component supply mechanism 5 Component mounting mechanism 8 Stock part 9 Shooter part 10 Case (storage case) 16 Air ejection port (gas ejection port) P component (electronic component) ) S Predetermined position (constant position on the side of the transfer track) Z Printed circuit board (circuit board)

Claims (1)

[Claims] 1. A transport track for transporting a circuit board in one direction, a component supply mechanism for supplying an electronic component to be mounted to a fixed position on the side of the transport track, and an electronic component supplied to the fixed position. Is a component mounting mechanism of an electronic component mounting apparatus comprising: a component mounting mechanism that grips the electronic component at a predetermined position on the circuit board; A stock portion for holding a stick-shaped storage case in which a plurality of the components are aligned and stored inside is provided toward the transportation track, and the stock portion is continuously stored at the end of the stock portion on the transportation track side. The case is configured to have a shooter portion that slides out along the upper surface of the case and sends it out. On the upper surface of the shooter portion, a plurality of gas ejection ports connected to a gas supply source are formed at regular intervals. is being done Component supply mechanism of the electronic component mounting apparatus characterized.