JPH0637484A - Electronic parts mounter - Google Patents

Abstract

PURPOSE:To prevent the slip out of a backup pin and the occurrence of unevenness of height by simplifying the structure of a backup unit for supporting a printed board, in the mounting position provided at an electronic parts mounter. CONSTITUTION:A backup unit 32 is constituted of a bottom plate 21 and a top plate 7, and the bottom of the backup pin 42 is elastically inserted and fixed, through a fastener 41 being made in cylindrical shape out of resin, into the through hole 9 made in the top plate 7.

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 machine for automatically mounting electronic components on a printed circuit board, and particularly to mounting electronic components capable of supporting a substrate conveyed by a supporting member having a simple structure. Regarding the machine.

[0002]

2. Description of the Related Art An electronic component mounting machine for automatically mounting electronic components on a substrate conveyed on a conveyor is provided with a backup unit as a supporting member for supporting the substrate from the lower surface at the mounting position. FIG. 4 shows an example of the configuration of a conventional backup unit. In FIG. 4, a lower plate 2 and an intermediate plate 3 are laminated on a bottom plate 1 and fixed integrally with screws 4. A washer 5 as a seat member is fixed by screws 6 on the intermediate plate 3 at predetermined positions.

A large number of through holes 8 and 9 are formed in the middle plate 3 and the upper plate 7 at positions aligned with each other, and the upper plate 7 is fixed to the washer 5 by screws 10.
A backup pin 11 as a support pin is inserted through the through holes 8 and 9, and the lower end of the support pin 11 is abutted against the upper surface of the lower plate 2. In this state, the support pin 11
Is perpendicular to the lower plate 2. The lower plate 2, the middle plate 3, the upper plate 7 and the backup pin 11 are each made of stainless steel to prevent rust.

[0004]

According to the conventional backup unit configured as described above, the three plates, that is, the middle plate 3 and the upper plate 7 which are precision drilled on the stainless steel plate, and the lower plate 2 which is not drilled. Since it uses, there was a problem that the cost becomes high. Further, since the backup pin 11 is passed through the through holes 9 and 8 formed in the upper plate 7 and the middle plate 3, respectively, and the lower end is abutted against the upper surface of the lower plate 2, the chips are cut on the lower plate 2. When garbage such as is piled up, pin 11
There was a possibility that the height of the tip of the may become uneven. Furthermore, since the backup pin 11 only penetrates the through holes 9 and 8 formed in the upper plate 7 and the middle plate 3, respectively, and is not fixed, the pin 11 comes into contact with the adhesive of the substrate to move the substrate. It was sometimes withdrawn.

The present invention has been made in view of the above circumstances, and provides an electronic component mounter having a simple structure and an inexpensive backup unit capable of making the height of the backup pin uniform and preventing the backup pin from coming off. The purpose is to do.

[0006]

An electronic component mounter according to claim 1 supports a substrate 22 conveyed on a conveyor 23 from a lower surface by a backup unit 32 as a supporting member, and mounts an electronic component on the substrate 2. In the electronic component mounter for mounting the, the backup unit 32 includes the bottom plate 1,
An upper plate 7 as a support plate which is attached to the bottom plate 1 via a washer 5 as a seat member and has a plurality of through holes 9 formed therein.
And a backup pin 42 as a support pin whose lower end is elastically inserted and fixed to the fastener 41.

An electronic component mounting machine according to a second aspect of the invention is characterized in that the fastener 41 is made of synthetic resin and has a substantially cylindrical shape.

The electronic component mounting machine according to a third aspect is characterized in that the backup pin 42 is formed of a synthetic resin in a rod shape.

[0009]

In the electronic component mounter according to claim 1,
The fastener 41 is elastically fitted and fixed in the through hole 9 formed in the upper plate 7. Similarly, the lower end of the backup pin 42 is elastically fitted and fixed to the fastener 41. Therefore,
The backup unit conventionally composed of four plates can be composed of two plates, and the cost can be reduced. The lower end of the backup pin 42 is the fastener 41.
Since it is firmly fixed to, there is no risk of falling out, and the upper end will not be uneven.

In the electronic component mounting machine according to the second and third aspects, since the fastener 41 and the backup pin 42 are made of synthetic resin, they can be elastically and firmly connected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic component mounter of the present invention will be described below with reference to the drawings.

1 to 3 show the configuration of an embodiment of the present invention. In FIG. 3, a conveyor 23 that conveys the printed circuit board 22 and a conveyor 23 are provided on the electronic component supply table 21.
The X-table 24 is fixed in a direction perpendicular to. A Y table 25 is provided on the X table 24 in a direction parallel to the conveyor 23, and a component insertion mounting machine 26 is provided on the Y table 25. Then, the Y table 25 moves on the X table 24 in the X direction, and the component insertion mounting machine 26 moves on the Y table 25 in the Y direction. Further, the component insertion / mounting machine 26 is provided with two insertion chucks 27 that move in the Z direction at right angles to the supply base 1 and rotate in the R direction. These movements and rotations are automatically performed by driving means (not shown).

A chip component feeder 28 and a lead component feeder 29 are provided on the electronic component feeder 1 in a direction perpendicular to the conveyor 23. The chip parts supply device 28 and the lead parts supply device 29 respectively store the chip parts or the lead parts according to their types. It is inserted or attached at a predetermined position on the substrate 22. A backup unit 32 that supports the substrate 22 and is driven up and down by a driving unit (not shown) is provided at the electronic component mounting position between the conveyors 3.

1 and 2 show the structure of the backup unit 32. In these figures, portions corresponding to those of the conventional example shown in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. In this embodiment, the lower plate 2 in the conventional example
Also, the middle plate 3 is omitted, the upper plate 7 is attached to the bottom plate 1 via the washer 5, and the fastener 41 is inserted into the through hole 9 formed in the upper plate 7.
The lower end of the backup pin 42 was inserted via the.

The fastener 41 is made of synthetic resin in a substantially cylindrical shape, and has a flange 41a on the upper end surface.
The fastener 41 is inserted into the through hole 9 at a predetermined position of the electronic component to be mounted on the substrate 22 supported by the backup pin 42 among the many through holes 9 formed in the upper plate 7.
At this time, the fastener 41 is elastically deformed by the through hole 9,
It is tightly coupled.

The backup pin 42 is formed of a synthetic resin in a rod shape, and a projection 42a and a flange 42b are concentrically provided on the lower end thereof. Then, the projection 42a is press-fitted into the center hole of the fastener 41, and the flange 42b is brought into contact with the upper surface of the upper plate 7, whereby the backup pin 42 is firmly held in the direction perpendicular to the upper plate 7.

As shown in FIG. 3, the backup unit 32 configured as described above is provided so as to be able to move up and down at the electronic component mounting position between the conveyors 23 on the electronic component supply base 21. Then, when the printed circuit board 22 is supplied by the conveyor 23 and reaches the upper portion of the backup unit 32 and stops, the backup unit 32 is raised by a driving device (not shown). When the upper ends of the backup pins 42 reach the back surface of the substrate 22, the ascending stops, and the component insertion / mounting machine 26 inserts or mounts the electronic component at a predetermined position on the substrate 22. When the electronic components are inserted and mounted, the backup unit 32 is lowered and the printed circuit board 22 is moved by the conveyor 23.

According to the present embodiment, the backup pin 42 made of synthetic resin is elastically inserted and fixed to the upper plate 7 via the fastener 41 also made of synthetic resin. The unit 32 can be composed of only the bottom plate 1 and the top plate 7, and the structure can be simplified and the cost can be reduced. Moreover, the heights of the upper ends of the backup pins can be made uniform, and the occurrence of omission can be prevented.

[0019]

As described above, according to the electronic component mounting machine of the first aspect, the backup unit as the supporting member is composed of the bottom plate and the upper plate, and the through hole formed in the upper plate. Since the lower end of the backup pin is elastically inserted and fixed via the fastener, the structure can be simplified and the cost can be reduced. In addition, the backup pin can be prevented from coming off, and the height of the upper end can be made uniform.

According to the electronic component mounter of the second aspect, since the fastener and the backup pin are made of synthetic resin, they can be firmly and elastically coupled to the upper plate.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a configuration of a backup unit provided in an embodiment of an electronic component mounting machine of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view showing an overall schematic configuration of an embodiment of an electronic component mounting machine of the present invention.

FIG. 4 is a vertical sectional view showing the configuration of an example of a conventional backup unit.

[Explanation of symbols]

 1 Bottom plate 5 Washer (seat member) 7 Top plate (support plate) 9 Through hole 22 Printed circuit board 23 Conveyor 32 Backup unit (support member) 41 Fastener (mounting member) 42 Backup pin (support pin)

Claims (3)

[Claims] 1. An electronic component mounter that mounts an electronic component on a substrate by supporting a substrate conveyed on a conveyor from below by a support member, wherein the supporting member is a bottom plate, and a seat member is mounted on the bottom plate. A support plate that is attached through the through hole and has a plurality of through holes formed therein; a mounting member that elastically fits into the through hole; and a support pin whose lower end is elastically inserted and fixed to the mounting member. An electronic component mounting machine characterized by. 2. The electronic component mounting machine according to claim 1, wherein the mounting member is made of synthetic resin and has a substantially cylindrical shape. 3. The electronic component mounting machine according to claim 1, wherein the support pin is formed of synthetic resin in a rod shape.