JPH0870199A - Electronic component mounting device - Google Patents

Abstract

PURPOSE: To make it possible to conduct automatically oil supply without demounting an electronic component. CONSTITUTION: An electronic component mounting device is constituted into a structure, wherein an oil feeding hole 39 is provided in a cylindrical cam member 25 and oil, such as grease, can be fed on the sliding surface of the member 25 and the sliding surface of a slider member 27a, which vertically moves a suction nozzle unit 24, by an oil feeding unit 37 through this hole 39 via a hose 36.

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 for mounting a chip-shaped electronic component at a predetermined position on a printed circuit board.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to FIGS. FIG. 3 is a sectional view of a conventional electronic component mounting apparatus, and FIG. 4 is a sectional view taken along the line AA of the apparatus of FIG.

In FIGS. 3 and 4, reference numeral 1 is an index unit for driving intermittent rotary motion, and a rotary table 3 is attached to an output shaft 2 of the index unit 1. A plurality of suction nozzle units 4 are fixed to the periphery of the rotary table 3 at equal intervals.

A cylindrical cam 5 has a cam groove 6 over the entire circumference.
Is provided. Sliders 7a and 7b are vertically slidably guided in a notch provided in a part of the cylindrical cam 5. Further, 8a and 8b are the slider 7
Lever for transmitting force to move a and 7b up and down, 9a and 9b are plate-shaped eccentric cams that drive levers 8a and 8b, and 10a and 10b are levers 8a and 8b attached to the cam surfaces of plate-shaped eccentric cams 9a and 9b. It is a spring that urges.

In the suction nozzle unit 4, 11 is a block which moves up and down, and a cam follower 12 is attached to the block so that it can move up and down along the cam groove 6 and the sliders 7a and 7b. A suction nozzle 13 sucks and holds an electronic component from the component supply unit 14 and mounts it on the printed circuit board 15.

The operation of the conventional electronic component mounting apparatus will be described.

The index unit 1 causes the output shaft 2 and the rotary table 3 to start an intermittent rotation operation. Before the intermittent rotation operation is completed, the levers 8a and 8b start a swinging motion along the rotational displacement of the plate-shaped eccentric cams 9a and 9b, and the cam followers inserted into the cam grooves 6 of the sliders 7a and 7b. 12 also begins to descend. Along with this lowering operation, the suction nozzle 13 also starts lowering.

After the output shaft 2 and the rotary table 3 have completed the intermittent rotation operation, the suction nozzle 13 reaches the bottom dead center and sucks and holds the electronic component from the component supply unit 14,
Electronic components are mounted on the printed circuit board 15.

[0009]

However, in the structure of the conventional device, the sliders 7a and 7b are provided in the notches of the cylindrical cam 5 so as to be slidable up and down. There is a problem that reliability is deteriorated due to abrasion and burning due to sliding between the sliders 7a and 7b and the cylindrical cam 5.

Further, even when grease is regularly applied to the sliders 7a and 7b, the suction nozzle unit 4 has to be removed from the rotary table 3, which makes the work very difficult.

It is an object of the present invention to provide an electronic component mounting apparatus which can replenish grease and the like without removing parts of the apparatus and which can automatically refuel according to the operating time of the apparatus. .

[0012]

In order to solve the above problems, the present invention provides an index unit for intermittently rotating a rotary table provided with a plurality of suction nozzle units for suctioning chip-shaped electronic components, and an index unit for rotating the rotary table. The suction nozzle includes a cylindrical cam member that regulates the vertical positional relationship of the suction nozzle unit over the entire circumference in the direction, and a slider member that vertically slides the cylindrical cam member to vertically move the suction nozzle unit at each work station. An electronic component mounting apparatus for mounting electronic components on a printed circuit board by a unit is characterized in that a sliding surface between the cylindrical cam member and the slider member can be refilled with oil from the outside.

Further, the apparatus is provided with a control unit for measuring the operating time of the apparatus and for issuing a signal when a predetermined operating time is reached, and an oil supply unit for automatically supplying a fixed amount of oil to the sliding surface by the signal. And

Further, the cylindrical cam member is provided with a hole for oil supply which reaches the sliding surface with the slider member, and the hole can be supplied with oil outside the driving range of the suction nozzle unit.

[0015]

According to the present invention, with the above-described structure, it is possible to lubricate the sliding (friction) surfaces of the cylindrical cam member and the slider member without removing the suction nozzle unit or parts, and for a predetermined time. By automatically refueling when the device operates, high reliability is ensured when operating the device at higher speeds.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the electronic component mounting apparatus of the present invention will be described below with reference to FIGS. 1 is a partial sectional view for explaining the structure of the present embodiment, FIG. 2 (a) is a sectional view taken along the line AA in FIG. 1, and FIG. 2 (b) is a sectional view taken along the line BB in FIG.

In FIGS. 1 and 2, reference numeral 21 is an index unit for driving intermittent rotary motion, and a rotary table 23 is attached to an output shaft 22 of the index unit 21. A plurality of suction nozzle units 24 are fixed to the periphery of the turntable 23 at equal intervals.

Reference numeral 25 denotes a cylindrical cam member, which is shown in FIG.
A cam groove (not shown) is provided as in the conventional example.
Reference numerals 27a and 27b denote slider members, which are vertically slidably guided in a notch provided in a part of the cylindrical cam member 25. Further, 28a and 28b are levers for transmitting a force for moving the slider members 27a and 27b up and down, and 29 is a lever 28.
A plate-shaped eccentric cam for driving a and 28b, and a spring 30 for urging the levers 28a and 28b against the cam surface of the plate-shaped eccentric cam 29, the plate-shaped eccentric cam 29 and the spring 30 in FIG. Although only one is shown, a plurality of them are actually installed.

In the suction nozzle unit 24, 31 is a block which moves up and down, to which a cam follower 32 is attached, and the cam groove and slider member 27.
It is attached so that it can move up and down along a and 27b. A suction nozzle 33 sucks and holds an electronic component from a component supply unit (not shown) and mounts it on a printed circuit board as is known.

Further, 35 is a hose joint provided on the cylindrical cam member 25, 36 is a hose for refueling, 37 is an oil supply unit, 38 is a control unit, 39 is provided on the cylindrical cam member 25 and communicates with the hose joint 35. Reference numeral 40 denotes an oil supply hole for a slider, and an oil passage 41 communicating with the oil supply hole 39 is a slider retainer.

The mounting operation of the electronic component on the printed circuit board in the present embodiment having the above-described structure is similar to that of the conventional example shown in FIG. 3, and the output shaft 22 and the rotary table 23 start intermittent rotation operation by the index unit 21. . From before the completion of the intermittent rotation operation, along the rotational displacement of the plate-shaped eccentric cam 29,
The lever 28a starts a swinging motion, and the cam follower 32 inserted in the cam groove of the slider 27a also starts descending. Along with this lowering operation, the suction nozzle 33 also starts lowering.

After the output shaft 22 and the rotary table 23 complete the intermittent rotation operation, the suction nozzle 33 reaches the bottom dead center, sucks and holds the electronic component from the component supply unit, and mounts the electronic component on the printed circuit board. .

The control unit 38 measures the operating time of the device, and when it exceeds a predetermined operating time, a signal is sent to the refueling unit 37. The oil supply unit 37 puts a fixed amount of lubricating oil such as grease into the oil supply hole 39 inside the cylindrical cam member 25 through the hose 36 and the hose joint 35.

In the portion shown in FIG. 2 (a), the grease that has entered the oil supply hole 39 passes through the oil passage 41 of the slider retainer 40 and reaches the front surface of the slider member 27a and the sliding surface of the slider retainer 40.

Further, in the portion shown in FIG. 2B, the grease reaches the contact surface between the rear surface of the slider member 27a and the cylindrical cam member 25.

[0026]

As described above, according to the electronic component mounting apparatus of the present invention, when the apparatus is operated for a predetermined time, the sliding surface between the slider member and the cylindrical cam member is automatically operated. It is possible to refuel, and conventionally, when refueling the portion, it was necessary to remove the surrounding members to refuel, but according to the present invention, it is possible to refuel without removing parts such as the nozzle unit. The reliability of the device can be improved due to the good workability of maintenance.

According to the second aspect of the invention, the refueling can be automatically performed under certain conditions, and more reliable maintenance can be performed.

According to the third aspect, the oil supply structure up to the sliding surface can be simplified.

[Brief description of drawings]

FIG. 1 is a partial sectional view for explaining an embodiment of an electronic component mounting apparatus of the present invention.

FIG. 2 is a sectional view taken along line AA and line BB in FIG.

FIG. 3 is a sectional view of a rotary table portion in a conventional electronic component mounting apparatus.

4 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

21 ... Index unit, 22 ... Output shaft, 23 ... Rotary table, 24 ... Suction nozzle unit, 25 ... Cylindrical cam member, 27a, 27b ... Slider member, 28a, 28b ... Lever, 29 ... Plate-shaped eccentric cam, 32 ... Cam Followers, 33
… Suction nozzle, 35… Hose fitting, 36… Hose, 37
… Lubrication unit, 38… Control unit, 39… Lubrication hole,
40… Slider holder, 41… Oil passage.

Claims (3)

[Claims] 1. An index unit for intermittently rotating a rotary table provided with a plurality of suction nozzle units for suctioning chip-shaped electronic components on the periphery, and a vertical positional relationship of the suction nozzle units is regulated over the entire circumference in the rotation direction. An electronic component mounting apparatus comprising: a cylindrical cam member; and a slider member that slides the cylindrical cam member up and down to vertically move the suction nozzle unit at each work station, and mounts an electronic component on a printed circuit board by the suction nozzle unit. An electronic component mounting apparatus, wherein a sliding surface between the cylindrical cam member and the slider member can be externally refueled. 2. A control unit for measuring an operating time of the device and emitting a signal when a predetermined operating time is reached, and an oil supply unit for automatically supplying a fixed amount of oil to the sliding surface by the signal. The electronic component mounting apparatus according to claim 1, which is characterized in that. 3. The cylindrical cam member is provided with a hole for oil supply that reaches a sliding surface with the slider member, and the hole can be supplied with oil outside the drive range of the suction nozzle unit. The electronic component mounting apparatus according to claim 1.