JP2012245606A - Position detection device, component assembling device, and component assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position detection device that detects a position of a component or the like with high accuracy.SOLUTION: The position detection device 50 for detecting a position of a component 20 has a base member 10 including a surface 11 and a back surface 12, and an image pickup camera 40 arranged on the back surface 12 side of the base member 10. The component 20 is arranged with the spacing S from the surface 11. The image pickup camera 40 detects the position of the component 20 by reading the light 40L having transmitted through the base member 10 from the surface 11 side to the back surface 12 side along an outer edge 20E of the component 20. The spacing S is determined so that the outer edge 20E of the component 20 is located within the depth of field 40R of the image pickup camera 40, and the surface 11 of the base member 10 is located outside the depth of field 40R of the image pickup camera 40 when the image pickup camera 40 detects the position of the component 20.

Description

  The present invention relates to a position detection device, a component assembly device, and a component assembly method, and more particularly, to a position detection device, a component assembly device including the position detection device, and a component assembly method using the position detection device.

  As disclosed in Japanese Patent Laid-Open No. 2006-133661 (Patent Document 1), in a general positioning device, a component assembly device, and the like, the position of a component or the like is detected using an imaging camera. In such a positioning device or the like, it is desired to detect the position of a component or the like with high accuracy.

Japanese Patent Laid-Open No. 2006-133661

  The present invention provides a position detection device capable of detecting the position of a component or the like with higher accuracy, a component assembly device including the position detection device, and a component assembly method using the position detection device. Objective.

  A position detection device according to the present invention is a position detection device that detects the position of a position detection object, and includes a first main surface and a light transmission member that includes a second main surface opposite to the first main surface. An imaging camera disposed on the second main surface side of the light transmissive member, and the position detection object is disposed at an interval with respect to the first main surface. By detecting the light transmitted through the light transmitting member from the first main surface side toward the second main surface side along the outer edge of the position detection object, the position of the position detection object is detected, The interval is such that when the imaging camera detects the position of the position detection object, the outer edge of the position detection object is located within the depth of field of the imaging camera, and the light transmitting member has the first depth. 1 Main surface is outside the depth of field of the imaging camera It is provided so as to be located.

  Preferably, a support member having a suction hole is provided on the first main surface of the light transmission member, and the position detection target is sucked through the suction hole, whereby the position detection target is It is fixed on the surface of the support member. Preferably, the support member is made of a metal member.

  Preferably, the position detection device according to the present invention further includes a suction pad, and the suction pad is arranged such that the position detection object is spaced from the first main surface. The position detection object is adsorbed.

  A component assembly apparatus according to the present invention is a component assembly apparatus that includes the position detection device according to the present invention and fixes a placement component to the position detection object fixed on the light transmission member. The imaging camera detects the position of the mounted component disposed on the opposite side of the imaging camera with the light transmitting member interposed therebetween, and the mounted component and the position detection object are detected. They are fixed to each other in a state of being positioned based on the respective positions.

  Another component assembling apparatus based on the present invention includes the position detecting device according to the present invention, and is a component assembling apparatus for fixing the position detection object to the light transmitting member. The first main surface is provided with a convex mounting portion having an alignment mark, and the imaging camera transmits light transmitted through the light transmitting member from the alignment mark side toward the second main surface side. By reading, the position of the alignment mark is detected, and the position detection object is positioned on the basis of the detected position of the position detection object and the detected position of the alignment mark. It is fixed on the surface of the writing section.

  A component assembling method according to the present invention includes a light transmitting member including a first main surface and a second main surface opposite to the first main surface, and a position disposed at a distance from the first main surface. A step of preparing a detection object, an imaging camera disposed on the second main surface side of the light transmission member, and a mounted component, and the imaging camera along an outer edge of the position detection object While detecting the position of the position detection object by reading the light transmitted through the light transmitting member from the first main surface side toward the second main surface side, the imaging camera includes the light The step of detecting the position of the mounted component disposed on the opposite side of the imaging camera with the transmission member interposed therebetween, and the mounted component and the position detection target are based on the detected positions. In a positioned state And the interval is such that when the imaging camera detects the position of the position detection object, the outer edge of the position detection object is located within the depth of field of the imaging camera. In addition, the first main surface of the light transmission member is provided so as to be located outside the depth of field of the imaging camera.

  Another component assembling method according to the present invention is a light transmissive member including a first main surface and a second main surface opposite to the first main surface, and is disposed at a distance from the first main surface. A position detection object, and an imaging camera disposed on the second main surface side of the light transmission member, and the imaging camera along the outer edge of the position detection object. Detecting the position of the position detection object by reading the light transmitted through the light transmission member from the first main surface side toward the second main surface side, and the first of the light transmission member A convex mounting portion having an alignment mark is provided on one main surface, and the imaging camera further transmits light transmitted through the light transmitting member from the alignment mark side toward the second main surface side. By reading Detecting the position of the alignment mark, and the position detection object is positioned based on the detected position of the position detection object and the detected position of the alignment mark. A step of fixing the outer periphery of the position detection object when the imaging camera detects the position of the position detection object. The first main surface of the light transmission member is provided so as to be located within the depth of field and outside the depth of field of the imaging camera.

  According to the present invention, a position detection device that can detect the position of a component or the like with higher accuracy, a component assembly device that includes the position detection device, and a component assembly method that uses the position detection device are obtained. Can do.

1 is a perspective view showing a component assembling apparatus in Embodiment 1. FIG. FIG. 3 is a perspective view showing a position detection device provided in the component assembling apparatus in the first embodiment. FIG. 3 is a plan view showing a base member (light transmission member) and a component (position detection object) provided in the position detection device in the first embodiment. It is arrow sectional drawing along the IV-IV line in FIG. FIG. 3 is a bottom view of a part (position detection object) seen transparently from the back surface side of a base member provided in the position detection device according to the first embodiment. It is sectional drawing which shows the 1st process of the components assembly method which uses the components assembly apparatus in Embodiment 1. FIG. It is sectional drawing which shows the 2nd process of the components assembly method which uses the components assembly apparatus in Embodiment 1. FIG. It is sectional drawing which shows the 3rd process of the components assembly method which uses the components assembly apparatus in Embodiment 1. It is sectional drawing which shows the 4th process of the components assembly method which uses the components assembly apparatus in Embodiment 1. It is sectional drawing which shows the 1st process of the components assembly method which uses the components assembly apparatus in Embodiment 2. It is sectional drawing which shows the 2nd process of the components assembly method which uses the components assembly apparatus in Embodiment 2. It is sectional drawing which shows the 3rd process of the components assembly method which uses the components assembly apparatus in Embodiment 2. FIG. It is sectional drawing which shows the 4th process of the components assembly method which uses the components assembly apparatus in Embodiment 2.

  Embodiments based on the present invention will be described below with reference to the drawings. In the description of each embodiment, when referring to the number, amount, or the like, the scope of the present invention is not necessarily limited to the number, amount, or the like unless otherwise specified. In the description of each embodiment, the same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

[Embodiment 1]
(Part assembly device 100)
With reference to FIG. 1, the component assembly apparatus 100 in this Embodiment is demonstrated. FIG. 1 is a perspective view showing a component assembling apparatus 100.

  As shown in FIG. 1, the component assembling apparatus 100 includes a base 61, an electric slider 62 placed on the base 61, a correction unit 64 provided on the electric slider 62, and a correction unit 64. The stage 63 provided, the electric slider 67 provided above the base 61, the suction pad 68 suspended from the electric slider 67, the parts base 69, and the imaging camera provided below the base 61 40.

  The electric slider 62 can reciprocate the correction unit 64 and the stage 63 along the arrow Y direction. The electric slider 67 can reciprocate the suction pad 68 along the arrow X direction. The suction pad 68 is configured to be movable up and down along the arrow Z direction.

  A base member 10 (see FIG. 2, details will be described later) is provided on the front end side of the stage 63. Light in the vicinity of the base member 10 reaches the imaging camera 40 through an opening 65 provided in the base 61. On the parts table 69, a part 20 (see FIG. 2, details will be described later), a part 30 (see FIG. 6, details will be described later) and the like are placed. The component 20 is a position detection target. The component 30 is assembled to the component 20.

(Position detection device 50)
FIG. 2 is a perspective view showing a position detecting device 50 provided in the component assembling apparatus 100 (see FIG. 1) in the present embodiment. As shown in FIG. 2, the position detection device 50 includes an imaging camera 40 and a base member 10 (light transmission member). The position detection device 50 detects the position of the component 20 (position detection object).

  Base member 10 is formed in a flat plate shape including a front surface 11 (first main surface) and a back surface 12 (second main surface). The base member 10 is composed of a light transmissive member. The material of the base member 10 is, for example, polycarbonate, acrylic, or glass.

  As described above, the base member 10 is horizontally disposed on the distal end side of the stage 63 (see FIG. 1). The base member 10 can be reciprocated together with the stage 63 along the direction of arrow Y in FIG. The base member 10 can also be moved together with the stage 63 along the arrow X direction and the arrow Y direction in FIG.

  The component 20 is, for example, silicon formed in a thin plate shape. The size of the component 20 is, for example, 4 mm × 4 mm × 1 mm. The component 20 is disposed on the surface 11 side of the base member 10. Although details will be described later, an interval S (see FIG. 4) is provided between the component 20 and the surface 11 of the base member 10.

  The imaging camera 40 is disposed on the opposite side of the component 20 with the base member 10 interposed therebetween. In other words, the imaging camera 40 is disposed on the back surface 12 side of the base member 10. As described above, the light in the vicinity of the base member 10 reaches the imaging camera 40 through the opening 65 (see FIG. 1) provided in the base 61 (see FIG. 1). Light 40L in the vicinity of the component 20 passes through the base member 10 from the front surface 11 side toward the back surface 12 side, and then reaches the imaging camera 40.

  FIG. 3 is a plan view showing the base member 10 and the component 20. 4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIGS. 3 and 4, a support member 13 having a plurality of suction holes 14 is provided on the surface 11 of the base member 10.

  Each suction hole 14 is provided so as to penetrate the support member 13 in the thickness direction. Each suction hole 14 is connected to an air pipe (not shown). The component 20 is fixed on the surface 13 </ b> S of the support member 13 by the suction hole 14 sucking the component 20.

  The support member 13 has a predetermined thickness. A space S (see FIG. 4) is formed between the component 20 that is suction-fixed on the surface 13S of the support member 13 and the surface 11 of the base member 10. The component 20 is floated from the surface 11 of the base member 10 by the support member 13.

  The support member 13 may be formed integrally with the base member 10, or may be joined to the surface 11 of the base member 10 after being formed separately from the base member 10. When the support member 13 is formed separately from the base member 10, the support member 13 may be configured from a metal member. By forming the support member 13 from a metal member, the surface 13S of the support member 13 can have high flatness. The base member 10 can be supported with high levelness.

  Referring to FIG. 4, the imaging camera 40 disposed on the back surface 12 side of the base member 10 emits light 40L transmitted through the base member 10 from the front surface 11 side toward the back surface 12 side along the outer edge 20E of the component 20. read.

  At this time, in order to obtain the position information of the component 20 with high accuracy, the component 20 is moved together with the base member 10 along the stage 63 (see FIG. 1) and the XY direction (see FIG. 1) with the imaging camera 40 fixed. It is good to be moved to. In accordance with the movement of the component 20, the imaging camera 40 may read all positional information of the four outer edges 20 </ b> E (see FIG. 3) of the component 20. Based on the read position information of the outer edge 20E of the component 20, the overall position of the component 20 is detected.

  Here, the interval S is such that when the imaging camera 40 detects the position of the component 20, the outer edge 20E of the component 20 is located within the depth of field 40R of the imaging camera 40, and the surface 11 of the base member 10 is The imaging camera 40 is configured to be located outside the depth of field 40R.

  FIG. 5 is a bottom view of the component 20 as seen transparently (looking up) from the back surface 12 side of the base member 10. In FIG. 5, for convenience, the base member 10 is indicated by a one-dot chain line.

  On the surface 11 (see FIG. 4) of the base member 10, a fine flaw may be formed or a minute foreign material 42 may remain. If the surface 11 of the base member 10 is located within the depth of field 40R of the imaging camera 40, the imaging camera 40 moves the outer edge 20E of the component 20 to the position of the dotted line 20F due to the presence of the foreign matter 42 and the like. I misunderstand it.

  On the other hand, in the position detection device 50 according to the present embodiment, the outer edge 20E of the component 20 is located within the depth of field 40R of the imaging camera 40 by providing the interval S described above, and The surface 11 of the base member 10 is located outside the depth of field 40R of the imaging camera 40. The fine scratches formed on the surface 11 of the base member 10 and the minute foreign matter 42 remaining on the surface 11 of the base member 10 are hardly detected by the imaging camera 40. When the imaging camera 40 recognizes an image of the outer edge 20E of the component 20, the measurement result is hardly influenced by the minute foreign matter 42. Therefore, according to the position detection device 50, the position of the component 20 can be detected with high accuracy.

(Parts assembly method)
FIG. 6 is a cross-sectional view showing a first step of the component assembling method using the component assembling apparatus 100. By using the component assembly apparatus 100, a component 30 such as a piezo element can be fixed on the component 20 (see FIG. 9).

  As shown in FIG. 6, first, the position of the component 30 is detected by the imaging camera 40. Specifically, in a state where the component 30 is sucked by the suction pad 68, the component 30 is conveyed so as to be included in the imaging range of the imaging camera 40 (see arrow AR11). The imaging camera 40 reads the light 40L transmitted through the base member 10 from the front surface 11 side toward the back surface 12 side along the outer edge 30E of the component 30.

  At this time, if possible, the base member 10 may be configured not to be disposed between the imaging camera 40 and the component 30. When the base member 10 is disposed between the imaging camera 40 and the component 30, a gap S is provided between the component 30 and the surface 11 of the base member 10.

  The component 30 is floated from the surface 11 of the base member 10 by the suction pad 68. By providing the interval S, the outer edge 30E of the component 30 is positioned within the depth of field of the imaging camera 40 when the imaging camera 40 detects the position of the component 30 as in the case of FIG. In addition, the surface 11 of the base member 10 is configured to be located outside the depth of field of the imaging camera 40. The measurement result is hardly influenced by fine scratches formed on the surface 11 of the base member 10. The position of the component 30 is detected with high accuracy. After the position of the component 30 is detected, the component 30 is retracted from the imaging camera 40.

  FIG. 7 is a cross-sectional view showing a second step of the component assembling method using the component assembling apparatus 100. As shown in FIG. 7, the position of the component 20 is detected by the imaging camera 40 after the component 30 (see FIG. 6) is retracted from the imaging camera 40. Specifically, in a state where the component 20 is fixed on the support member 13 provided on the base member 10, the component 20 is conveyed so as to be included in the imaging range of the imaging camera 40 (see arrow AR12). The imaging camera 40 reads the light 40L transmitted through the base member 10 from the front surface 11 side toward the back surface 12 side along the outer edge 20E of the component 20.

  The component 20 is floating from the surface 11 of the base member 10 by the support member 13. By providing the interval S, the outer edge 20E of the component 20 is positioned within the depth of field of the imaging camera 40 when the imaging camera 40 detects the position of the component 20 as in the case of FIG. In addition, the surface 11 of the base member 10 is configured to be located outside the depth of field of the imaging camera 40. The interval S between the component 20 and the surface 11 (FIG. 7) and the interval S between the component 30 and the surface 11 (FIG. 6) may be the same or different. Even in the case of the component 20, the measurement result is hardly influenced by a minute flaw formed on the surface 11 of the base member 10. The position of the component 20 is detected with high accuracy.

  FIG. 8 is a cross-sectional view showing a third step of the component assembling method using the component assembling apparatus 100. After the positions of the component 20 and the component 30 are detected, the component 20 and the component 30 are positioned based on the detected positions (see the arrows AR13 and AR14). In the present embodiment, the component 30 is arranged at a predetermined position so as to face the surface 20S of the component 20.

  FIG. 9 is a cross-sectional view showing a fourth step of the component assembling method using the component assembling apparatus 100. After both the component 20 and the component 30 are positioned, the suction pad 68 moves downward (see arrow AR15). The component 30 is placed on the surface 20S of the component 20 with a thermosetting adhesive or the like interposed therebetween. The component 30 is fixed on the surface 20S of the component 20 with an adhesive or the like.

  According to the component assembling method using the component assembling apparatus 100 in the present embodiment, the positions of the component 20 and the component 30 are detected with high accuracy. The component 30 can be fixed to the component 20 with high accuracy.

[Embodiment 2]
With reference to FIG. 10, the component assembly apparatus 200 in this Embodiment is demonstrated. Here, differences from the component assembly apparatus 100 according to the first embodiment will be described. FIG. 10 is a cross-sectional view showing a part of the component assembling apparatus 200. FIG. 10 is also a cross-sectional view showing a first step of a component assembling method using the component assembling apparatus 200.

  As shown in FIG. 10, in the component assembling apparatus 200, the base member 10 </ b> A (light transmitting member) including the front surface 11 and the back surface 12 opposite to the front surface 11, and the imaging arranged on the back surface 12 side of the base member 10 </ b> A The camera 40 constitutes a position detection device. The position detection device 50 detects the positions of the component 20A (position detection object) and the alignment mark 16 described below.

  The base member 10A is composed of a light transmissive member. The material of the base member 10A is, for example, glass. The surface 11 of the base member 10 </ b> A is provided with a convex placement portion 15 that protrudes from the surface 11. An alignment mark 16 is recessed on the surface 15S of the mounting portion 15. The base member 10 </ b> A is supported horizontally by the stage 63.

  The component 20A is, for example, silicon formed in a thin plate shape. The size of the component 20A is, for example, 30 mm × 40 mm × 1 mm. The component 20 </ b> A is disposed on the surface 11 side of the base member 10. When the component 20 </ b> A is sucked by the suction pad 68, a gap S is provided between the component 20 </ b> A and the surface 11 of the base member 10.

  In the component assembling apparatus 200 configured as described above, the position of the component 20A is first detected by the imaging camera 40 as the first step of the component assembling method. Specifically, in a state where the component 20A is sucked by the suction pad 68, the component 20A is conveyed so as to be included in the imaging range of the imaging camera 40 (see arrow AR21). At this time, as illustrated in FIG. 109, the component 20 </ b> A is disposed at a position shifted (in the horizontal direction) from the placement unit 15. The imaging camera 40 reads the light 40L transmitted through the base member 10A from the front surface 11 side toward the back surface 12 side along the outer edge 20E of the component 20A.

  If possible, the base member 10A may be configured not to be disposed between the imaging camera 40 and the component 20A. When the base member 10A is disposed between the imaging camera 40 and the component 20A, the above-described gap S is provided between the component 20A and the surface 11 of the base member 10A.

  The component 20 </ b> A is floated from the surface 11 of the base member 10 </ b> A by the suction pad 68. By providing the interval S, when the imaging camera 40 detects the position of the component 20A, the outer edge 20E of the component 20A is positioned within the depth of field of the imaging camera 40, and the surface 11 of the base member 10 is the imaging camera. It is configured to be located outside the 40 depth of field. The measurement result is hardly influenced by fine scratches or the like formed on the surface 11 of the base member 10A. The position of the component 20A is detected with high accuracy. After the position of the component 20 </ b> A is detected, the component 20 </ b> A is retracted from the imaging camera 40.

  FIG. 11 is a cross-sectional view showing a second step of the component assembling method using the component assembling apparatus 200. As shown in FIG. 11, the position of the alignment mark 16 is detected by the imaging camera 40 after the component 20 </ b> A (see FIG. 10) is retracted from the imaging camera 40. Specifically, when the base member 10A moves, the alignment mark 16 is transported so as to be included in the imaging range of the imaging camera 40 (see arrow AR22). The imaging camera 40 reads the light 40L transmitted through the base member 10A from the alignment mark 16 side toward the back surface 12 side.

  FIG. 12 is a cross-sectional view showing a third step of the component assembling method using the component assembling apparatus 200. After the positions of the component 20A and the alignment mark 16 are detected, the component 20A and the base member 10A are positioned based on the detected position of the component 20A and the detected position of the alignment mark 16 (arrow AR23 and arrow AR24). In the present embodiment, the outer edge 20E and the alignment mark 16 are arranged to face each other.

  FIG. 13 is a cross-sectional view showing a fourth step of the component assembling method using the component assembling apparatus 200. After both the component 20A and the base member 10A are positioned, the suction pad 68 moves downward (see arrow AR25). The component 20A is placed on the surface 15S of the placement unit 15 with a thermosetting adhesive or the like interposed therebetween. The component 20A is fixed on the surface 15S of the placement portion 15 with an adhesive or the like.

  According to the component assembling method using the component assembling apparatus 200 in the present embodiment, the positions of the component 20A and the base member 10A are detected with high accuracy. The component 20A can be fixed with high accuracy to the base member 10A.

  As mentioned above, although each embodiment based on this invention was described, each embodiment disclosed this time is an illustration and restrictive at no points. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  10, 10A Base member (light transmission member), 11 surface (first main surface), 12 back surface (second main surface), 13 support member, 13S, 15S, 20S surface, 14 suction hole, 15 mounting portion, 16 Alignment mark, 20, 20A parts (position detection target), 20E, 30E outer edge, 20F dotted line, 30 parts (placed part), 40 imaging camera, 40L light, 40R depth of field, 42 foreign object, 50 position detection Device, 61 base, 62, 67 Electric slider, 63 stage, 64 corrector, 65 opening, 68 suction pad, 69 parts table, 100, 200 parts assembly device, AR11, AR12, AR13, AR14, AR15, AR21, AR22, AR23, AR25, AR34 Arrow, S interval.

Claims (8)

A position detection device for detecting the position of a position detection object,
A light transmissive member including a first main surface and a second main surface opposite to the first main surface;
An imaging camera disposed on the second main surface side of the light transmissive member,
The position detection object is arranged at an interval with respect to the first main surface,
The imaging camera reads the light transmitted through the light transmission member from the first main surface side toward the second main surface side along the outer edge of the position detection object, thereby detecting the position detection object. Detect the position,
The interval is such that when the imaging camera detects the position of the position detection object, the outer edge of the position detection object is located within the depth of field of the imaging camera and the light transmitting member has the first distance. 1 main surface is provided so as to be located outside the depth of field of the imaging camera,
Position detection device. A support member having a suction hole is provided on the first main surface of the light transmitting member,
The position detection object is fixed on the surface of the support member by the position detection object being sucked through the suction hole.
The position detection device according to claim 1. The support member is composed of a metal member.
The position detection device according to claim 2. Further equipped with a suction pad,
The suction pad sucks the position detection object such that the position detection object is arranged at the interval with respect to the first main surface;
The position detection device according to claim 1. A component assembly device comprising the position detection device according to any one of claims 1 to 4 and fixing a mounted component to the position detection object fixed on the light transmission member,
The imaging camera detects the position of the mounted component disposed on the opposite side of the imaging camera with the light transmission member interposed therebetween,
The mounted component and the position detection object are fixed to each other in a state of being positioned based on each detected position.
Parts assembly equipment. A component assembly device comprising the position detection device according to claim 1 and fixing the position detection object to the light transmission member,
The first main surface of the light transmission member is provided with a convex placement portion having an alignment mark,
The imaging camera detects the position of the alignment mark by reading the light transmitted through the light transmission member from the alignment mark side toward the second main surface side,
The position detection object is fixed on the surface of the mounting unit in a state where the position detection object is positioned based on the detected position of the position detection object and the position of the detected alignment mark.
Parts assembly equipment. A light transmission member including a first main surface and a second main surface opposite to the first main surface; a position detection object disposed at an interval with respect to the first main surface; and A step of preparing an imaging camera disposed on the second main surface side, and a mounted component, respectively;
The imaging camera reads the light transmitted through the light transmission member from the first main surface side toward the second main surface side along the outer edge of the position detection object, thereby Detecting the position;
The imaging camera detecting the position of the mounted component disposed on the opposite side of the imaging camera with the light transmitting member interposed therebetween;
The mounted component and the position detection object are fixed to each other in a state of being positioned based on each detected position, and
The interval is such that when the imaging camera detects the position of the position detection object, the outer edge of the position detection object is located within the depth of field of the imaging camera and the light transmitting member has the first distance. 1 main surface is provided so as to be located outside the depth of field of the imaging camera,
Parts assembly method. A light transmissive member including a first main surface and a second main surface opposite to the first main surface, a position detection object disposed at a distance from the first main surface, and the light transmissive Preparing each imaging camera disposed on the second main surface side of the member;
The imaging camera reads the light transmitted through the light transmission member from the first main surface side toward the second main surface side along the outer edge of the position detection object, thereby Detecting the position, and
The first main surface of the light transmission member is provided with a convex placement portion having an alignment mark,
further,
The imaging camera detects the position of the alignment mark by reading the light transmitted through the light transmission member from the alignment mark side toward the second main surface side;
A step of fixing the position detection object on the surface of the mounting unit in a state where the position detection object is positioned based on the position of the detected position detection object and the position of the detected alignment mark; With
The interval is such that when the imaging camera detects the position of the position detection object, the outer edge of the position detection object is located within the depth of field of the imaging camera and the light transmitting member has the first distance. 1 main surface is provided so as to be located outside the depth of field of the imaging camera,
Parts assembly method.