U.S. patent application number 14/764192 was filed with the patent office on 2015-12-17 for support pin arrangement determination assisting apparatus and support pin arrangement determination assisting method.
The applicant listed for this patent is PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.. Invention is credited to Hirokazu Takehara, Takaaki Yokoi.
Application Number | 20150363957 14/764192 |
Document ID | / |
Family ID | 51262021 |
Filed Date | 2015-12-17 |
United States Patent
Application |
20150363957 |
Kind Code |
A1 |
Takehara; Hirokazu ; et
al. |
December 17, 2015 |
SUPPORT PIN ARRANGEMENT DETERMINATION ASSISTING APPARATUS AND
SUPPORT PIN ARRANGEMENT DETERMINATION ASSISTING METHOD
Abstract
A support pin arrangement determination assisting apparatus
includes: a display unit which displays a first board image
indicating an already mounted component on the already mounted
surface and a second board image indicating a component to be
mounted on a mounting subject surface; a position input unit
through which an arrangement position of a support pin is input to
the displayed images; and a pin image display processing unit which
causes the display unit to display a composite image in which a pin
arrangement image indicating the input arrangement positions is
superimposed on the first board image or the second board image.
The pin image display processing unit can cause display of a
composite image based on the first board image and a composite
image based on the second board image in a switched manner.
Inventors: |
Takehara; Hirokazu;
(Yamanashi, JP) ; Yokoi; Takaaki; (Yamanashi,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. |
Osaka-shi, Osaka |
|
JP |
|
|
Family ID: |
51262021 |
Appl. No.: |
14/764192 |
Filed: |
January 29, 2014 |
PCT Filed: |
January 29, 2014 |
PCT NO: |
PCT/JP2014/000468 |
371 Date: |
July 29, 2015 |
Current U.S.
Class: |
345/629 |
Current CPC
Class: |
Y10T 29/49119 20150115;
H05K 13/08 20130101; Y10T 29/53174 20150115; Y10T 29/53191
20150115; H05K 13/0069 20130101; G06F 30/00 20200101; G06T 11/60
20130101; H05K 13/0061 20130101 |
International
Class: |
G06T 11/60 20060101
G06T011/60 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 30, 2013 |
JP |
2013-015079 |
Jan 30, 2013 |
JP |
2013-015080 |
Jan 31, 2013 |
JP |
2013-016523 |
Claims
1. A support pin arrangement determination assisting apparatus
which assists determination of an arrangement of support a pin that
supports an already mounted surface of a board from a lower side in
a board holding unit of an electronic component mounting machine,
said support pin arrangement determination assisting apparatus
comprising: a display unit which displays an image for pin
arrangement determination assistance including a first board image
that indicates a shape and an arrangement of an already mounted
component on the already mounted surface and a second board image
that indicates a shape and an arrangement of a component to be
mounted on a mounting subject surface; a position input unit
through which an arrangement position of the support pin is input
to the displayed images; and a pin image display processing unit
which causes the display unit to display a composite image in which
a pin arrangement image indicating the input arrangement positions
is superimposed on the first board image or the second board image,
wherein the pin image display processing unit can cause display of
a composite image based on the first board image and a composite
image based on the second board image in a switched manner.
2. The support pin arrangement determination assisting apparatus
according to claim 1, further comprising: a storage unit which
stores data relating to component characteristics of at least the
component to be mounted on the mounting subject surface, wherein
the pin image display processing unit causes the display unit to
display the composite image based on the second board image
according to support necessity characteristics indicated by the
data relating to the component characteristics.
3. A support pin arrangement determination assisting method for
assisting the determination of an arrangement of a support pin that
supports an already mounted surface of a board from a lower side in
a board holding unit of an electronic component mounting machine,
said support pin arrangement determination assisting method
comprising: displaying an image for pin arrangement determination
assistance including a first board image that indicates a shape and
an arrangement of an already mounted component on the already
mounted surface and a second board image that indicates a shape and
an arrangement of a component to be mounted on a mounting subject
surface; inputting an arrangement position of the support pin to
the displayed images; and causing display of a composite image in
which a pin arrangement image indicating the input arrangement
position is superimposed on the first board image or the second
board image, wherein the composite image is displayed such that a
composite image based on the first board image and a composite
image based on the second board image are displayed in a switched
manner.
4. The support pin arrangement determination assisting method
according to claim 3, wherein the composite image based on the
second board image is displayed according to support necessity
characteristics indicated by the data stored in advance and
relating to component characteristics of at least the component to
be mounted on the mounting subject surface.
Description
TECHNICAL FIELD
[0001] The present invention relates to a support pin arrangement
determination assisting apparatus and support pin arrangement
determination assisting method, for assisting the determination of
an arrangement of support a pin that supports a board in an
electronic component mounting machine.
BACKGROUND ART
[0002] Support pin methods in which a board is supported by
bringing plural support pins into contact with a lower surface are
employed widely as board support methods for supporting a board
from a lower side in component mounting processes of mounting
electronic components on a board. In such support pin methods, in
the case where there are already mounted components that have
already been mounted on the lower side of a board in a preceding
process, it is necessary to determine an arrangement of support
pins by selecting locations that enable supporting (supportable
positions) without causing positional interference with the already
mounted components. The determination of an arrangement of support
pins is done in such a manner that an operator observes the
arrangement of electronic components on an already mounted surface
at a manufacturing site and thereby finds supportable locations.
Various kinds of assisting apparatus have come to be employed to
facilitate this pin arrangement work (refer to Patent Document 1,
for example). In the related art technique disclosed in this Patent
Document, an image of an already mounted surface and an image
indicating the arrangement of pin holes where support pins are
disposed are displayed in superimposition to enable a visual check
as to occurrence/non-occurrence of interference between the support
pins and the already mounted components.
RELATED ART DOCUMENTS
Patent Documents
[0003] Patent Document 1: JP-A-2008-211051
SUMMARY OF THE INVENTION
Problem to be Solved by the Invention
[0004] In determining an arrangement of support pins, it is
desirable to take into consideration not only
occurrence/non-occurrence of interference with already mounted
components but also mounting positions of electronic components to
be mounted on a mounting subject surface. That is, at a mounting
position of a large electronic component such as a connector
component on which a large mounting load is exerted during a
mounting operation, it is necessary to dispose a support pin to
receive the mounting load from the lower side. Furthermore, it is
desirable to dispose a support pin on the lower side of an
electronic component which requires high mounting position
accuracy, such as a semiconductor device to be connected via metal
bumps, because even a slight positional deviation due to a warp of
the board would adversely affect its mounting quality. However, in
the related art including the technique disclosed in the
above-mentioned Patent Document, it is difficult to realize a
proper support pin arrangement taking into consideration the
characteristics of certain components to be mounted on a mounting
subject surface in addition to interference with already mounted
components. As a result, a mounting failure may occur due to an
improper manner of support.
[0005] In view of the above, an object of the present invention is
to provide a support pin arrangement determination assisting
apparatus and a support pin arrangement determination assisting
method which can set a proper support pin arrangement taking into
consideration not only a component arrangement on an already
mounted surface but also a component arrangement on a mounting
subject surface.
Means for Solving the Problem
[0006] According to the present invention, there is provided a
support pin arrangement determination assisting apparatus which
assists determination of an arrangement of support a pin that
supports an already mounted surface of a board from a lower side in
a board holding unit of an electronic component mounting machine,
the support pin arrangement determination assisting apparatus
including: display means which displays an image for pin
arrangement determination assistance including a first board image
that indicates a shape and an arrangement of an already mounted
component on the already mounted surface and a second board image
that indicates a shape and an arrangement of a component to be
mounted on a mounting subject surface; a position input unit
through which an arrangement position of the support pin is input
to the displayed images; and a pin image display processing unit
which causes the display means to display a composite image in
which a pin arrangement image indicating the input arrangement
positions is superimposed on the first board image or the second
board image, wherein the pin image display processing unit can
cause display of a composite image based on the first board image
and a composite image based on the second board image in a switched
manner.
[0007] According to the present invention, there is provided a
support pin arrangement determination assisting method for
assisting the determination of an arrangement of a support pin that
supports an already mounted surface of a board from a lower side in
a board holding unit of an electronic component mounting machine,
the support pin arrangement determination assisting method
including: a display step of displaying an image for pin
arrangement determination assistance including a first board image
that indicates a shape and an arrangement of an already mounted
component on the already mounted surface and a second board image
that indicates a shape and an arrangement of a component to be
mounted on a mounting subject surface; a position input step of
inputting an arrangement position of the support pin to the
displayed images; and a pin image display processing step of
causing display of a composite image in which a pin arrangement
image indicating the input arrangement position is superimposed on
the first board image or the second board image, wherein in the pin
image display processing step, a composite image based on the first
board image and a composite image based on the second board image
are displayed in a switched manner.
Advantages of the Invention
[0008] According to the invention, in determining arrangement of
the support pin for supporting the already mounted surface of the
board from the lower side in the board holding unit, the image
including the first board image indicating the already mounted
surface and the second board image indicating a mounting subject
surface is displayed, and in the pin image display processing of
causing display of the composite image in which the pin arrangement
image produced by inputting the arrangement position of the support
pin to the displayed images is superimposed on the first board
image or the second board image, the composite image based on the
first board image and the composite image based on the second board
image are displayed in a switched manner. As a result, it is
possible to set a proper support pin arrangement in which an
arrangement position of a component that exists on the mounting
subject surface and needs to be supported is also taken into
consideration.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is a plan view showing the configuration of an
electronic component mounting machine according to an embodiment of
the present invention.
[0010] FIGS. 2(a) and 2(b) illustrate the configurations of a board
conveying mechanism and a board support mechanism of the electronic
component mounting machine according to the embodiment of the
invention.
[0011] FIGS. 3(a) and 3(b) illustrate a board positioning method of
a board holding unit of the electronic component mounting machine
according to the embodiment of the invention.
[0012] FIGS. 4(a) and 4(b) illustrate the configuration of the
board support mechanism of the board holding unit of the electronic
component mounting machine according to the embodiment of the
invention.
[0013] FIGS. 5(a) and 5(b) illustrate a board as a work subject of
the electronic component mounting machine according to the
embodiment of the invention.
[0014] FIGS. 6(a) and 6(b) illustrate the structure of each support
pin module which is used in the board support mechanism of the
electronic component mounting machine according to the embodiment
of the invention.
[0015] FIGS. 7(a) and 7(b) illustrate the functions of each support
pin module of the board holding unit of the electronic component
mounting machine according to the embodiment of the invention.
[0016] FIG. 8 is a block diagram showing the configuration of a
control system of an electronic component mounting system that
includes the electronic component mounting machine according to the
embodiment of the invention.
[0017] FIGS. 9(a)-9(c) illustrate component data and support pin
data used in the electronic component mounting machine according to
the embodiment of the invention.
[0018] FIGS. 10(a)-10(c) illustrate a support pin arrangement
determination assisting method in the electronic component mounting
machine according to the embodiment of the invention.
[0019] FIGS. 11(a)-11(c) also illustrate the support pin
arrangement determination assisting method in the electronic
component mounting machine according to the embodiment of the
invention.
[0020] FIG. 12 is a flowchart of the support pin arrangement
determination assisting method in the electronic component mounting
machine according to the embodiment of the invention.
MODE FOR CARRYING OUT THE INVENTION
[0021] Next, an embodiment of the present invention will be
described with reference to the drawings. First, the overall
configuration of an electronic component mounting machine 1 will be
described with reference to FIG. 1. The electronic component
mounting machine 1 has a function of holding an electronic
component with an absorption nozzle that is attached to a mounting
head and mounting it on a board, and constitutes an electronic
component mounting system together with a host system 15 and, other
machines connected to it via a communication network 16.
[0022] As shown in FIG. 1, a board conveying mechanism 2 for
conveyance in the X direction (board conveying direction) is
disposed at the center in a base stage 1a. The board conveying
mechanism 2 has functions of conveying a board 3 that has been
carried in from the upstream side and positioning it at a mounting
work position of a component mounting mechanism (described later),
and has two conveyance rails 2a which are arranged parallel with
each other. The board conveying mechanism 2 is equipped, at the
center, with a board support mechanism 2c for supporting a board 3
that has been carried in and presser members 2b for clamping the
board 3 that has been lifted up by the board support mechanism 2c
by pressing, from above, its two side end portions that are opposed
to each other.
[0023] Component supply units 4 for supplying electronic components
to be mounted are disposed on the two respective sides of the board
conveying mechanism 2. In each component supply unit 4, plural tape
feeders 5 are arranged parallel with each other and each tape
feeder 5 has a function of pitch-feeding components that are held
by a carrier tape to a pick-up position of the component mounting
mechanism (described later). A Y-axis movement table 6 is disposed
on the top surface of the base stage 1a at one end in the X
direction, and two X-axis movement tables 7 are attached to the
Y-axis movement table 6 so as to be slidable in the Y direction. A
mounting head 8 is attached to each X-axis movement table 7 so as
to be slidable in the X direction.
[0024] Each mounting head 8, which is a multiple head that includes
plural unit holding heads 9, picks up an electronic component P to
be mounted from a tape feeder 5 and holds it by vacuum absorption
by means of a component absorption nozzle 14A (see FIG. 7(a)) that
is attached to a nozzle holder 9a that is attached to the lower end
of each unit holding head 9. The Y-axis movement table 6 and the
X-axis movement tables 7 constitute a head moving mechanism for
moving the mounting heads 8.
[0025] By driving the head moving mechanism, each mounting head 8
is moved between the associated component supply unit 4 and a board
3 that has been positioned by the board conveying mechanism 2. Each
mounting head 8 is lowered and elevated over the board 3, whereby
the electronic component P (see FIG. 7(a)) held by the mounting
head 8 are mounted on the board 3. The mounting heads 8 and the
head moving mechanism for moving the mounting heads 8 constitute a
component mounting mechanism 17 (see FIG. 8) for picking up
components from the component supply units 4 and mounting them on a
board 3.
[0026] A board recognition camera 10 is attached to the lower
surface of each X-axis movement table 7 so as to be moved together
with the associated mounting head 8. The board recognition camera
10 shoots a recognition mark formed on a board 3 being held by the
board conveying mechanism 2 when moved to over the board 3 as the
head moving mechanism is driven. A component recognition camera 11,
a first nozzle housing unit 12, and a second nozzle housing unit 13
are disposed in the movement path of each mounting head 8 between
the associated component supply unit 4 and the board conveying
mechanism 2.
[0027] When a mounting head 8 that has picked up a component from
the component supply unit 4 passes over the component recognition
camera 11 in a prescribed direction (scan operation), the component
recognition camera 11 shoots the component being held by the
mounting head 8. Plural absorption nozzles 14A corresponding to
respective component types and to be attached to the nozzle holders
9a of the unit holding heads 9 are housed in the first nozzle
housing unit 12. Absorption nozzles 14B (see FIG. 7(b)) each of
which is used being attached to the nozzle holder 9a of a unit
holding head 9 when a support pin module 22 shown in FIG. 6(a) is
moved are housed in the second nozzle housing unit 13. An
absorption nozzle attached to a unit holding head 9 can be replaced
to one suitable for a purpose or a target component type as a
result of a nozzle replacement operation that is performed by a
mounting head 8 by accessing the associated first nozzle housing
unit 12 or second nozzle housing unit 13.
[0028] Next, referring to FIGS. 2(a) and 2(b) and FIGS. 3(a) and
3(b), a description will be made of how a place where mounting work
is performed with the board conveying mechanism 2 of the electronic
component mounting machine 1, that is, a mounting stage where
component mounting work is performed on a board 3 by the
above-described component mounting mechanism, is formed. As shown
in FIG. 2(a), the board conveying mechanism 2 is equipped with
conveyor mechanisms 2d which are disposed so as to extend in the X
direction along the two conveyance rails 2a. As shown in FIG. 2(b),
the conveyor mechanisms 2d convey a board 3 in the X direction by
means of conveyance belts that are reciprocated in the horizontal
direction by a motor 19.
[0029] In the board conveying mechanism 2, a mounting stage [S]
having a length Lo in the X direction is set in a movable range of
each mounting head 8, that is, a working range in which component
mounting by the component mounting mechanism 17 is possible. The
mounting stage [S] is provided with a board holding unit for
holding a board 3, and the board 3 is supported by the board
support mechanism 2c from the lower side. The board support
mechanism 2c is configured in such a manner that a horizontal,
plate-like support base 21 is elevated and lowered (indicated by
arrow "a") by an elevation mechanism 20. Pin modules 22 (support
pins) for supporting a board 3 from the lower side are erected from
the top surface of the support base 21.
[0030] The conveyance rails 2a are provided with a first
positioning sensor 18A at a position corresponding to the
downstream end of the mounting stage [S] and is also provided with
a second positioning sensor 18B at a position that corresponds to
the upstream end of the mounting stage [S] and is distant upstream
from the first positioning sensor 18A by a distance Lo. The first
positioning sensor 18A and the second positioning sensor 18B, each
of which is an optical sensor, detect that the head 3c and the tail
3d (see FIGS. 3(a) and 3(b)) of a board 3 that has been conveyed by
the conveyor mechanisms 2d have reached the positions of the first
positioning sensor 18A and the second positioning sensor 18B when
the head 3c and the tail 3d of the board 3 interrupt detection
light beams of the first positioning sensor 18A and the second
positioning sensor 18B, respectively.
[0031] Detection signals of the first positioning sensor 18A and
the second positioning sensor 18B are transmitted to a control unit
40 (see FIG. 8). The control unit 40 controls the motor 19 and the
elevation mechanism 20 on the basis of the received control
signals, whereby the board 3 can be positioned at a prescribed
position in the board conveying mechanism 2 and the part, in the
working range, of the positioned board 3 can be held being
supported from below. The first positioning sensor 18A, the second
positioning sensor 18B, and the board support mechanism 2c
constitute a board positioning mechanism for positioning a board 3
at a first mounting work position or a second mounting work
position (described below) and holding it there.
[0032] Next, referring to FIGS. 3(a) and 3(b), a description will
be made of board positioning done in a case that a board 3A (see
FIG. 12) that is longer than the length Lo of the mounting stage
[5] is to be subjected to mounting work. To deal with a board 3A
that is longer than the length Lo of the mounting stage [S], first,
as shown in FIG. 3(a), the board 3 is positioned at a position
(first mounting work position) where its head 3c is located at the
detection optical axis position of the first positioning sensor
18A. In this state, a sticking-out portion 3* having a sticking-out
length L* sticks out upstream from the mounting stage [S] and
component mounting mechanism 17 cannot perform component mounting
work on the sticking-out portion 3*.
[0033] Therefore, as shown in FIG. 3(b), the board 3A is moved
downstream by the conveyor mechanisms 2d (indicated by arrow "b")
and is positioned at a position (second mounting work position)
where its tail 3d is located at the detection optical axis position
of the second positioning sensor 18B. As a result, in the state
that the board 3A is positioned at the second mounting work
position, the sticking-out portion 3* is included in the range of
the mounting stage [S] and hence can be subjected to component
mounting work of the component mounting mechanism 17. That is, in
the embodiment, in the case where a board 3A is to be dealt with
that is longer than the working range in which component mounting
work can be performed by the component mounting mechanism 17,
component mounting work is performed plural times on the board 3A
as it is positioned successively at plural mounting work positions
including at least the first mounting work position and the second
mounting work position.
[0034] Next, referring to FIGS. 4(a) and 4(b), a description will
be made of the configuration and the functions of the board support
mechanism 2c which is provided in the board conveying mechanism 2.
As shown in FIGS. 2(a) and 2(b), the conveyor mechanisms 2d are
disposed inside the two conveyance rails 2a which are part of the
board conveying mechanism 2, so as to extend in the conveying
direction. A board 3 is conveyed in the board conveying direction
by driving the conveyor mechanisms 2d in a state that two
respective side end portions of the board 3 are in contact with the
top surfaces of the conveyor mechanisms 2d. Clamp members 2e for
supporting respective side end portions of a board 3 from below
when the board 3 is clamped by pressing their side end portions by
from above by the respective presser members 2b are disposed inside
the conveyor mechanisms 2d so as to be able to elevated and lowered
because they are in contact with the support base 21.
[0035] The board support mechanism 2c which is disposed at the
center of the board conveying mechanism 2 so as to correspond to
the mounting stage [S] is configured in such a manner that the
horizontal, plate-like support base 21 is elevated and lowered
(indicated by arrow "c") by the elevation mechanism 20. The pin
modules 22 for supporting a board 3 from the lower side are erected
from the top surface of the support base 21. In the embodiment,
boards 3 to be supported include double-sided mounting boards
having first surface 3a and second surface 3b (front surface and
back surface) which are both to be mounted with electronic
components.
[0036] FIGS. 5(a) and 5(b) show an example of such double-sided
mounting boards. In this example, the first surface 3a shown in
FIG. 5(a) is to be mounted with plural kinds of electronic
components P (e.g., BGA components Pa, DIP components Pb, chip
components Pc, etc.). The second surface 3b shown in FIG. 5(b) is
to be mounted with plural kinds of electronic components P
including a connector component Pd. When the first surface 3a is a
mounting subject surface, the second surface 3b is made a surface
to be supported, and vice versa.
[0037] When the surface to be supported is an already mounted
surface that has been mounted with electronic components in a
preceding process, it is necessary to select a support pin
arrangement that does not cause interference with the support pin
modules 22 taking positions of already mounted components on the
already mounted surface into consideration. To this end, the
embodiment employs such a configuration that the support pin
modules 22 can be placed at any positions on the support base 21.
More specifically, the support base 21 has a structure that the top
surface of a plate member 21b made of a non-magnetic material such
as aluminum is coated with a magnetic material 21a such as steel
and the support pin modules 22 are placed at desired positions
according to support positions of a board 3 to be supported.
[0038] Magnetic attractive force occurs between the magnetic
material 21a and a magnet member 27 (see FIG. 6(b)) that is
provided in a base portion 23 of each support pin module 22 being
set in a support state, whereby the support pin module 22 is fixed
to the support base 21. The entire support base 21 may be made of a
magnetic material; it suffices that at least a top layer of the
support base 21 be made of a magnetic material. As shown in FIG.
4(b) in this state the support base 21 is elevated (indicated by
arrow "d") by driving the elevation mechanism 20, whereby the top
ends of the support pin modules 22 and the top ends of the clamp
members 2e come into contact with the lower surface of the board 3.
The board 3 is supported by the board support mechanism 2c, and the
position of the board 3 is fixed because its two respective end
portions are pressed against the lower surfaces of the presser
members 2b.
[0039] Next, the structure and the functions of each support pin
module 22 will be described with reference to FIGS. 6(a) and 6(b).
As shown in FIG. 6(a), each support pin module 22 is configured in
such a manner that a hollow shaft 24 extends upward from a base
portion 23 which is in contact with the support base 21. A top
portion 25 which is attached to the top end of the shaft 24 has a
contact portion 25a which projects upward and is shaped like a
narrow-diameter pin and an absorption brim 25b which extends
laterally. The contact portion 25a supports a board 3 with its top
end being in contact with the lower surface of the board 3. A
suction hole 24a penetrates through the shaft 24 and communicates
with a suction hole 25c which penetrates through the contact
portion 25a in the vertical direction.
[0040] As shown in FIG. 6(b), the base portion 23 is configured in
such a manner that a lid member 23b to which the shaft 24 is fixed
is combined with a base portion body 23a inside which a cylindrical
elevation room 23c is formed. A piston 26 to which a magnet member
27 is attached is fitted in the elevation room 23c so as to be
slidable in the vertical direction. In an ordinary state, the
piston 26 is located at the bottom in the elevation room 23c and
the base portion 23 is fixed to the magnetic material 21a by the
magnetic attractive force of the magnet member 27.
[0041] When vacuum suction is done through the suction hole 24a of
the shaft 24, the piston 26 is elevated in the elevation room 23c
and the distance between the lower surface of the magnet member 27
and the top surface of the magnetic material 21a is thereby
increased. As a result, the magnetic attractive force acting
between the magnet member 27 and the magnetic material 21a is
weakened to a large extent, whereby the fixing of the base portion
23 to the support base 21 is canceled. That is, the support pin
module 22 includes the base portion 23 which contacts the support
base 21 provided in the board holding unit, and the magnet for
fixing the support pin module 22 to the base 23 is provided in the
base portion 23. Each support pin module 22 can thus be placed at
any position on the support base 21.
[0042] FIG. 7(a) shows a state that an electronic component P is
being mounted on a board 3 that is supported and held by the board
support mechanism 2c, by a mounting head 8 in which an absorption
nozzle 14A is attached to a nozzle holder 9a. In this state, the
top ends of the contact portions 25a of the support pin modules 22
support the board 3 from the lower side. Even if the surface to be
supported of the board 3 is an already mounted surface and is
mounted with electronic components P, the absorption brims 25b and
the contact portions 25a are prevented from interfering with the
already mounted electronic components P by properly setting the
arrangement of the support pin modules 22 on the support base
21.
[0043] FIG. 7(b) shows an operation of moving a support pin module
22 that is placed on the support base 21. In this operation, a
mounting head 8 in which an absorption nozzle 14B is attached to a
nozzle holder 9a is moved to over the support pin module 22 and
vacuum suction is done with the top portion 25 covered with the
absorption nozzle 14B. As a result, the magnetic attractive force
of the magnet member 27 acting between the base portion 23 and the
magnetic material 21a in the structure shown in FIGS. 6(a) and 6(b)
is weakened and the absorption nozzle 14B absorbs and holds the
absorption brim 25b. In this state, the support pin module 22 is
moved by moving the mounting head 8.
[0044] Next, referring to FIG. 8 to FIGS. 11(a)-11(c), a
description will be made of the configuration of a control system
of an electronic component mounting system including the electronic
component mounting machine 1 and a support pin arrangement
determination assisting function of the electronic component
mounting system. This function is to assist the determination of an
arrangement of the support pin modules 22 which support an already
mounted surface of a board 3 from the lower side in the board
holding unit having the board support mechanism 2c.
[0045] As shown in FIG. 8, the host system 15 is equipped with an
overall control unit 30, a storage unit 31, a pin image display
processing unit 32, an interference judging unit 33, an alarm
processing unit 34, a display device 35, a manipulation/input unit
36, and a communication unit 37. The overall control unit 30, which
is a processing/computing device, supervises support pin
arrangement determination assistance processing work of the
electronic component mounting machine 1 on the basis of various
programs and data stored in the storage unit 31.
[0046] In this processing work, as shown in FIG. 10(a), an image
indicating shapes and an arrangement of electronic components P on
a board 3 are displayed on a display screen 35a of the display
device 35 (display means) such as a liquid crystal panel and an
operator inputs desired arrangement positions of the support pin
modules 22 to the image through the manipulation/input unit 36
(position input unit) having a pointing device such as a mouse.
[0047] Images to be displayed on the display screen 35a include a
board image (first board image) indicating shapes and an
arrangement of already mounted components on the already mounted
surface of the board 3a board image (second board image) indicating
shapes and an arrangement of components to be mounted on the
mounting subject surface. The reason why the second board image is
also displayed is that as described later a certain type of
component to be mounted requires disposition of a support pin
module 22 to support it or its neighborhood from the lower side
during a mounting operation. The board image may be a camera image
acquired by shooting an actual board as well as an image that is
based on image data such as CAD data that is output at a designing
stage.
[0048] Support pin arrangement data indicating determined
arrangement positions of the support pin modules 22 is transmitted
from the communication unit 37 to the electronic component mounting
machine 1 over the communication network 16. In the electronic
component mounting machine 1, the mounting heads 8 operate on the
basis of the support pin arrangement data, whereby the support pin
modules 22 are moved automatically on the support base 21 and a
support pin arrangement suitable for the surface to be supported of
the subject board 3 is realized.
[0049] The storage unit 31 stores mounting data 31a, component data
31b, support pin data 31c, and board position data 31d. The
mounting data 31a is data that is necessary for a component
mounting operation of the mounting heads 8 such as types, mounting
position coordinates, etc. of electronic components to be mounted
on the board 3. The component data 31b is data relating to
three-dimensional shapes (see FIG. 9(a)) and component
characteristics of electronic components to be mounted on the board
3, and the component characteristics include a support necessity
characteristic indicating whether or not the board needs to be
supported from the lower side for mounting the component on the
mounting subject surface. The support pin data 31c is data relating
to a three-dimensional shape of the top portion 25 of each support
pin module 22.
[0050] The board position data 31d is positioning control data to
be used in the case where the subject of mounting work is a board
like the board 3A shown in FIGS. 3(a) and 3(b), that is,
positioning control data to be used for positioning the board 3A at
each of plural mounting work positions (in the example being
described, a first mounting work position and a second mounting
work position) with respect to the mounting stage [S]. By referring
to the board position data 31d, a board image corresponding to a
state that the board 3A is positioned at each of the plural
mounting work positions can be displayed.
[0051] The pin image display processing unit 32 performs processing
for displaying to the display device 35 an image to be referred to
by an operator in inputting arrangement positions of the support
pin modules 22 on the support base 21. The pin image display
processing unit 32 is equipped with processing functional units
that are an image synthesizing unit 32a and a display switching
unit 32b. The image synthesizing unit 32a performs processing of
generating a composite image by superimposing, on a board image, a
pin arrangement image that has been produced as a result of input
via the manipulation/input unit 36 of pin arrangement positions by
an operator.
[0052] One of a first board image indicating shapes and an
arrangement of already mounted components on an already mounted
surface and a second board image indicating shapes and an
arrangement of components to be mounted on a mounting subject
surface (see FIGS. 5(a) and 5(b)) can be selected as the board
image. For example, if the first surface 3a shown in FIG. 5(a) is
an already mounted surface, the first surface 3a is made the first
board image and the second surface 3b shown in FIG. 5(b) is made
the second board image for a mounting subject surface. That is, the
pin image display processing unit 32 displays, on the display
device 35, a composite image produced by superimposing a pin
arrangement image indicating input arrangement positions on the
first board image or the second board image.
[0053] FIG. 10(b) shows an example composite image produced by
superimposing a pin arrangement image on the first surface 3a which
is a first board image. An operator observes the first board image
and inputs, using the pointing function of the manipulation/input
unit 36, a pin arrangement that allows the board 3 to be supported
in a well-balanced manner and does not cause interference with the
already mounted components. In this example, five points, that is,
arrangement positions SP1-SP5, have been input, whereby position
coordinates (xpi, ypi) of each arrangement position SPi are taken
in. In this example, the arrangement position SP5 which is located
at the center is interposed between two close, already mounted
components and hence consideration should be given to whether or
not interference occurs between a support pin modules 22 and these
already mounted components. In the embodiment, whether or not such
interference occurs is judged automatically using the already
stored shape data and position data and the input data of the
arrangement positions SP.
[0054] Referring to FIG. 9(a), a description will now be made of a
planar image of each support pin module 22 in the above-mentioned
pin arrangement image. FIG. 9(a) which is a plan view shows a
planar image in a state that an already mounted surface of a board
3 is supported by a support pin module 22. This planar image
includes an image of the top portion 25 which is attached to a
shaft 24 erected in the board holding unit and an image of the
contact portion 25a (the tip portion of the top portion 25) which
is smaller in sectional shape than the absorption brim 25b and is
to support the board 3 by contacting its lower surface. In this
planar image of the support pin module 22, an outline portion A and
a central portion B of the top portion 25 correspond to the
absorption brim 25b (outer circumference) and the contact portion
25a of the top portion 25, respectively.
[0055] In displaying a composite image, the display switching unit
32b performs processing of displaying one of (i.e., switching
between) a composite image (see FIG. 10(b)) that is based on a
first board image and a composite image (see FIG. 10(c)) that is
based on a second board image. Since the first board image and the
second board image are a back image and a front image of the same
board, in making this switching the first board image and the
second board image are displayed so as to have a mirror-image-like
positional relationship by making image data inversion. This allows
an operator to refer to a board image as would be seen as a plan
view when a board 3 is actually positioned with respect to the
mounting stage [S].
[0056] In a case in which the second image 3B shown in FIG. 5(b) is
a mounting subject surface, since it includes the connector
component Pd as a component to be mounted, it is necessary to
determine a pin arrangement taking the position of the connector
component Pd into consideration. That is, since in mounting, on the
board 3, the connector component Pd which is a fitting component it
needs to be pressed against the board 3 with a larger load than an
ordinary surface mounting component is, it is desirable to support
the connector component Pd or its neighborhood from the lower side
to prevent warp deformation of the board 3.
[0057] In the embodiment, as described above, each electronic
component that needs to be supported from the opposite surface side
during a mounting operation is determined in advance and a related
description is made in the component data 31b as one item of its
component characteristics. If an electronic component that needs to
be supported exists for a mounting subject surface, the pin image
display processing unit 32 causes display of a second board image
that indicates shapes and an arrangement of components to be
mounted on the mounting subject surface. That is, the pin image
display processing unit 32a composite image that is based on the
second board image on the display device 35 on the basis of support
necessity that is described in the data relating to component
characteristics that are included in the component data 31b.
[0058] FIG. 10(c) shows an example that a second board image that
is an image of the second surface 3b is displayed on the display
screen 35a in place of a first board image. In this example, the
second surface 3b has the connector component Pd that is described
as a support-necessary component in the component data 31b.
Therefore, an operator observes the second board image and selects
a position that is in the region of the connector component Pd and
its neighborhood and is suitable for support of the board 3, that
is, a position that does not cause interference with any already
mounted components in the first surface 3a. In this example, an
arrangement position SP6 is input that is in the vicinity of the
connector component Pd and bears no already mounted component on
the first surface 3a.
[0059] In this work, since both of the first surface 3a and the
second surface 3b need to be observed, there may occur a case that
front/back inversion needs to be made plural times repeatedly. In
this case, switching can be made between the first board surface
and the second board surface with desired timing by the function of
the display switching unit 32b by manipulating a front/back
inversion button 35b displayed on the display screen 35a.
[0060] The interference judging unit 33 judges whether or not some
of the support pin modules 22 for which arrangement positions have
been input interfere with already mounted components existing on
the surface to be supported on the basis of the three-dimensional
shape data of the electronic components included in the component
data 31b and the three-dimensional shape data, included in the
support pin data 31c, of the contact portion of the support pin
module 22, that is, the top portion 25 that is to come into contact
with the surface to be supported of the board 3.
[0061] FIG. 9(a) shows examples of three-dimensional shape data of
electronic components and the top portion 25. More specifically,
stored as part of the component data 31b are (a1, b1, c1), (a2, b2,
c21), . . . that represent dimensions in the X, Y, and Z directions
of electronic components P1, P2, . . . to be mounted on the board
3. Stored as the support pin data 31c are (d1, d2, d3) that
represent dimensions of the top portion 25 of the support pin
module 22, that is, the diameter of the absorption brim 25b, the
diameter and the length of the contact portion 25a.
[0062] Positions of already mounted electronic components P1, P2, .
. . on the already mounted surface are given by sets of mounting
coordinates (x1, y1), (x2, y2), . . . that are stored as part of
the mounting data 31a. An arrangement position SP (xp, yp) where a
support pin module 22 is to be placed is input performing a
manipulation on a picture displayed on the display screen 35a using
the manipulation/input unit 36. The interference judging unit 33
judges whether or not positional interference occurs between the
top portion 25 and the electronic components P1, P2, . . . on the
basis of those three-dimensional shape data and position data.
[0063] For example, as shown in FIG. 9(b), since as for the
relationship between an electronic component P1 and the top portion
25 the dimension c1 is larger than d3, a judgment "no interference"
is made unless the outer surface of the electronic component P1 is
located inside a first interference region R1 that is defined by
the arrangement position SP (xp, yp) and the diameter d1 of the
absorption brim 25b. As shown in FIG. 9(c), since as for the
relationship between an electronic component P2 and the top portion
25 the dimension c3 is smaller than d3, a judgment "no
interference" is made unless the outer surface of the electronic
component P2 is located inside a second interference region R2 that
is defined by the diameter d1 of the absorption brim 25b even if
the outer surface of the electronic component P1 is located inside
the first interference region R1 which is defined by the
arrangement position SP (xp, yp) and the diameter d1 of the
absorption brim 25b. That is, the interference judging unit 33
judges occurrence/non-occurrence of three-dimensional positional
interference between already mounted components such as the
electronic components P1 and P2 and the contact portion 25a in the
region between an outline portion A and a central portion B.
[0064] If the interference judging unit 33 judges that there is
occurrence of interference, the alarm processing unit 34 performs
processing of displaying an alarm picture for announcing that fact
on the display device 35. Recognizing the alarm picture, the
operator changes the arrangement position SP (xp, yp). With the
above processing, even in a case that the surface to be supported
is an already mounted surface that is mounted with electronic
components at a high density, occurrence/non-occurrence of
interference can be judged more precisely and a support pin
arrangement can be realized with higher accuracy. The alarm
processing unit 34 and the display device 35 constitute an alarming
means for announcing a judgment result "occurrence of interference"
using the display device 35 upon that judgment is made.
[0065] In a case in which the mounting subject board is of such a
kind as to be positioned at plural mounting work positions (in the
example being described, the first mounting work position and the
second mounting work position) with respect to the mounting stage
[S] like the board 3A shown in FIGS. 3(a) and 3(b), the pin image
display processing unit 32 performs the following processing. In
this case, different portions of the same board 35A are supported
by the plural support pin modules 22 that are arranged on the
support base 21 in advance. Therefore, it is necessary to determine
arrangement positions so that the support pin modules 22 can
support the board 3A properly irrespective of whether the board 3A
is positioned at the first mounting work position or the second
mounting work position. To this end, the pin image display
processing unit 32 causes display, as superimposed on each board
image, of a pin arrangement image produced with an assumption that
the board 3A is positioned at each of the first mounting work
position and the second mounting work position. The operator
adjusts the pin arrangement positions so as to prevent interference
with the already mounted components in either state.
[0066] In the example being described, as shown in FIG. 11(a), a
board image of the board 3A is displayed on the display screen 35a
of the display device 35. Subsequently, in a state that the board
is positioned at the first mounting work position, arrangement
positions SP (in this example, five arrangement positions SP1-SP5)
for support of a mounting area (i.e., an area excluding a
sticking-out portion 3* having a sticking-out length L*) occupying
the mounting stage [S] are selected and input using the
manipulation/input unit 36. A composite image shown in FIG. 11(b)
is generated by superimposing an image of the input arrangement
positions (first pin arrangement image) on the board image and
displayed on the display screen 35a.
[0067] Although an arrangement position SP3 in the first pin
arrangement image that corresponds to the first mounting work
position does not cause interference with any already mounted
components, it may cause interference with an already mounted
component P in a second pin arrangement image (described below). In
view of this, in inputting the arrangement position SP3, the
operator selects a proper position taking into consideration
interference with the already mounted electronic component P in the
second pin arrangement image.
[0068] Then a composite image is generated by superimposing, on a
board image, a second pin arrangement image produced with an
assumption that the board 3A is positioned at the second mounting
work position, and is displayed on the display screen 35a. That is,
as shown in FIG. 11(c), a second pin arrangement image is generated
so as to be superimposed on the image of the input arrangement
positions (first pin arrangement image) and a board image of the
board 3A as moved to the second mounting work position on the basis
of the board position data 31d so that the sticking-out portion 3*
that was outside the mounting area when the board 3A was located at
the first mounting work position is completely included in the
mounting stage [S].
[0069] In other words, a second pin arrangement image is generated
on the basis of the first mounting work position and the second
mounting work position (the positioned positions of the board 3A)
that are stored as the board position data 31d in advance and the
image of the input arrangement positions (first pin arrangement
image), and a composite image produced by superimposing both of the
first pin arrangement image and the second pin arrangement image on
the board image is displayed. By observing the thus-generated
composite image, the operator can confirm that even in the state
that the board 3A is moved to the second mounting work position a
proper board support state can be realized that does not cause
interference between the already mounted components and the support
pin modules 22 arranged on the support base 21.
[0070] In displaying the above composite image, it is desirable
that the planar images of the support pins that indicate the
arrangement positions SP (i.e., first pin arrangement image and
second pin arrangement image) be displayed in different colors or
using different figures to enable discrimination between the sets
of support pins corresponding to the respective pin arrangements.
In the example shown in FIGS. 11(a)-11(c), the arrangement
positions SP1-SP5 in the first pin arrangement image shown in FIG.
11(a) are shown by symbols having central portions B (see FIGS.
9(a)-9(c)) drawn as black circles, and those in the second pin
arrangement image shown in FIG. 11(b) are shown by symbols having
central portions B drawn as white circles to facilitate
discrimination between the two sets of arrangement positions
SP1-SP5. This makes it possible to prevent an event that an
arrangement position is selected erroneously, that is, the pin
arrangement concerned is mistaken as one corresponding to a wrong
mounting work position in selection of the arrangement positions.
Thus, in the embodiment, a planar image of support pins in a first
pin arrangement image and a planar image of support pins in a
second pin arrangement image are displayed in different display
forms.
[0071] That is, in the embodiment, in a case in which the
above-described type of board 3A is a work subject board, the pin
image display processing unit 32 performs processing of causing the
display device 35 to display a composite image (see FIG. 11(b) or
11(c)) produced by superimposing, on a board image corresponding to
the mounting area of each mounting work position, a first pin
arrangement image of which arrangement positions have been input in
a state that the board 3A is positioned at the first mounting work
position and a second pin arrangement image generated on the basis
of the first pin arrangement image with an assumption that the
board 3A is positioned at the second mounting work position.
[0072] The electronic component mounting machine 1 is equipped with
the control unit 40, a storage unit 41, a recognition processing
unit 42, a display unit 43, a manipulation/input unit 44, and a
communication unit 45. The control unit 40, which is a
processing/computing device, controls the operations of the board
conveying mechanism 2, the component supply units 4, and the
component mounting mechanism 17 on the basis of operation programs
and mounting data stored in the storage unit 41. The recognition
processing unit 42 performs recognition processing on shooting
results of the board recognition cameras 10 and the component
recognition cameras 11. The display unit 43, which is a display
panel such as a liquid crystal panel, displays guide pictures for
manipulation of the manipulation/input unit 44 and various
announcement pictures. The communication unit 45 exchanges signals
with the host system 15 and other machines via the communication
network 16.
[0073] In the above configuration, the overall control unit 30, the
storage unit 31, the pin image display processing unit 32, the
interference judging unit 33, the alarm processing unit 34, the
display device 35, and the manipulation/input unit 36 constitute a
support pin arrangement determination assisting apparatus for
assisting the determination of an arrangement of support pins that
support the already mounted surface of a board 3 or 3A from the
lower side in the board holding unit of the electronic component
mounting machine 1. Although the embodiment is directed to the
example configuration in which the support pin arrangement
determination assisting function is provided in a board 3, this
function may be performed by the control processing function of the
electronic component mounting machine 1.
[0074] A support pin arrangement determination assisting method for
assisting the determination of an arrangement of support pins using
the support pin arrangement determination assisting apparatus
having the above configuration will now be described with reference
to the related drawings according to a flowchart of FIG. 12. As
shown in FIG. 12, first, an image for pin arrangement determination
including a board image is displayed on the display screen 35a
(display step, ST1). More specifically, in a case in which a board
3 having an ordinary size is to be dealt with, a board image like
the first surface 3a shown in FIG. 10(a) is displayed on the
display screen 35a. In a case in which a board 3A is to be dealt
with that needs to be subjected to mounting work plural times while
being positioned successively at plural mounting work positions
including at least a first mounting work position and a second
mounting work position, a board image like the one shown in FIG.
11(a) is displayed on the display screen 35a.
[0075] Then arrangement positions SP of support pin modules 22 are
input to the displayed image using the pointing function of the
manipulation/input unit 36 (position input step, ST2). More
specifically, as shown in FIGS. 10(b) and 11(b), an operator
selects and inputs arrangement positions SP1-SP5 that are suitable
for supporting while observing the shapes and arrangement of
already mounted components on the already mounted surface to be
supported. In this example, the support pin modules 22 can be
placed at any positions on the support base 21.
[0076] Then a composite image is generated in which a pin
arrangement image indicating the arrangement positions SP is
superimposed on the board image (ST3) and the generated composite
image is displayed on the display screen 35a (pin image display
processing step, ST4). The planar image of each support pin module
22 shown in this composite image includes the images of the
absorption brim 25b and the contact portion 25a of the top portion
25 shown in FIGS. 9(a)-9(c), which makes it possible to judges
occurrence/non-occurrence of interference between the top portions
25 and the already mounted components on the composite image.
[0077] In a case in which the board 3A is to be dealt with, as
shown in FIGS. 11(b) and 11(c), a composite image produced by
superimposing both of a first pin arrangement image and a second
pin arrangement image on each board image is displayed. The first
pin arrangement image is generated by inputting arrangement
positions in a state that the board 3A is positioned at the first
mounting work position. The second pin arrangement image is
generated on the basis of the first pin arrangement image and the
first mounting work position and the second mounting work position
(the positioned positions of the board 3A) stored as the board
position data 31d in advance with an assumption that the board 3A
is positioned at the second mounting work position.
[0078] By referring to the board position data 31d, whether or not
the mounting components of the mounting subject surface include a
component that needs to be supported during a mounting operation is
judged on the basis of the support necessity characteristics that
are described in the data relating to the component characteristics
that is included in the board position data 31d (ST5). If like the
board 3 shown in FIGS. 10(a)-10(c) the mounting subject surface has
a connector component Pd that needs to be supported because it will
receive a pressing load during a mounting operation, the two
surfaces, that is, the already mounted surface and the mounting
subject surface, are displayed in a switched manner (ST6). Thus,
switching is made from display as shown in FIG. 10(b) that is
directed to the already mounted surface to display as shown in FIG.
10(c) that is directed to the mounting subject surface. The
operator additionally inputs an arrangement position for the
connector component Pd.
[0079] If no component that needs to be supported is found at step
ST5 or step ST6 has been executed, occurrence/non-occurrence of
interference between the support pins and the already mounted
components is judged (interference judging step, ST7). More
specifically, by referring to the component data 31b and the
support pin data 31c, the interference judging unit 33 judges
whether or not one or some of the support pin modules 22 of which
arrangement positions have been input interfere with an already
mounted component(s) on the basis of the three-dimensional shape
data of the electronic components that is part of the component
data 31b stored in advance and the three-dimensional shape data of
the contact portion 25a of the support pin module 22 that is
indicated by the support pin data 31c (see FIGS. 9(a)-9(c)).
[0080] If a judgment "occurrence of interference" is made at step
ST7, the announcing means announces that fact in the form of, for
example, display on the display device 35 (alarm step, ST8). The
process returns to step ST2, in which the arrangement position
concerned is corrected to eliminate the interference. Then a
judgment "no interference" is made at step ST7, whereby the support
pin arrangement is finalized (ST9). Thus, the support pin
arrangement determination assisting process is finished.
[0081] As described above, in the support pin arrangement
determination assistance according to the embodiment, in
determining an arrangement of the support pin modules 22 for
supporting an already mounted surface of a board 3 from the lower
side in the board holding unit, the procedure is followed which
includes displaying an image including a board image that indicates
shapes and an arrangement of already mounted components on the
already mounted surface, causing input of arrangement positions of
the support pin modules 22 to the displayed image, and displaying a
composite image in which a pin arrangement image indicating the
input arrangement positions is superimposed on the board image. And
a planar image of each support pin module 22 in the pin arrangement
image includes an image of the top portion 25 and an image of the
contact portion 25a for contacting and supporting the lower surface
of the board 3. As a result, in support pin arrangement determining
work for a high mounting density board 3, occurrence/non-occurrence
of interference between the support pins and the already mounted
components can be judged more precisely.
[0082] In the pin image display processing of displaying images
including a first board image indicating an already mounted surface
and a second board image indicating a mounting subject surface and
displaying a composite image in which a pin arrangement image
obtained by inputting arrangement positions of the support pin
modules 22 to the displayed images is superimposed on a first board
image or a second board image, a composite image based on the first
board image and a composite image based on the second board image
are displayed in a switched manner. This makes it possible to set a
proper support pin arrangement in which an arrangement position of
a component that exists on the mounting subject surface and needs
to be supported is also taken into consideration.
[0083] Furthermore, in a case in which the subject board is a board
3A that is to be subjected to plural times of mounting work while
being positioned successively at plural mounting work positions, a
composite image is displayed that is produced by superimposing, on
each board image, a first pin arrangement image of which
arrangement positions have been input in a state that the board 3A
is positioned at the first mounting work position and a second pin
arrangement image generated on the basis of the first pin
arrangement image with an assumption that the board 3A is
positioned at the second mounting work position. This makes it
possible to simplify the work of determining a common support pin
arrangement for the plural mounting work positions.
[0084] The present application is based on Japanese Patent
Application No. 2013-015079 and No. 2013-015080 both filed on Jan.
30, 2013 and No. 2013-016523 filed on Jan. 31, 2013, the
disclosures of which are incorporated herein by reference.
INDUSTRIAL APPLICABILITY
[0085] The support pin arrangement determination assisting
apparatus and the support pin arrangement determination assisting
method according to the invention provide the advantage that a
proper support pin arrangement can be set taking into consideration
not only a component arrangement on an already mounted surface but
also a component arrangement on a mounting subject surface, and are
useful in the field of electronic component mounting for mounting
electronic components on a board that is supported by support
pins.
DESCRIPTION OF REFERENCE SIGNS
[0086] 1: Electronic Component Mounting Machine [0087] 2: Board
Conveying Mechanism [0088] 2c: Board Support Mechanism [0089] 3,
3A: Board [0090] 8: Mounting Head [0091] 21: Support Base [0092]
22: Support Pin Module [0093] 23: Base Portion [0094] 24: Shaft
[0095] 25: Top Portion [0096] 25a: Contact Portion [0097] 27:
Magnet Member
* * * * *