JP4460755B2 - Suction nozzle position check jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction nozzle position confirmation jig, and more particularly to a suction nozzle for recognizing whether or not the tip of the suction nozzle is at a predetermined position when sucking an electronic component with the suction nozzle. This relates to a position confirmation jig.
[0002]
[Prior art]
Conventionally, as a technique in such a field, there is JP-A-11-230717. The position confirmation jig described in this publication is a jig for visually confirming whether or not the suction nozzle provided in the electronic component mounting machine stops at a desired position when sucking the electronic component. . The jig illuminates the tip of the suction nozzle with the light source unit and images the suction nozzle from below and from the side, thereby accurately recognizing the position of the suction nozzle. In this case, the position confirmation jig is configured to guide light to the CCD while changing the optical path in the housing with the reflection mirror, and this reflection mirror is accurate so that the imaging position on the CCD does not shift. Position adjustment is required, and a fine adjustment mechanism as shown in FIG. 4 is provided. In this mechanism, the reflecting mirror 100 is housed in the frame 105 in a state of being fixed to the movable member 101. The two adjusting screws 102 and 103 are attached to the frame 105 in a state of being aligned in a straight line, and the male screws 102a and 103a are screwed from both sides (two directions) of the movable member 101. . Thereby, the linear fine adjustment of the reflection mirror 100 using the feed pitch of the screws 102 and 103 is achieved.
[0003]
[Problems to be solved by the invention]
The fine adjustment mechanism of the reflection mirror 100 provided in the above-described conventional suction nozzle position confirmation jig achieves linear fine adjustment by cooperation of the two adjustment screws 102 and 103. That is, when fine adjustment of the reflecting mirror 100 is necessary, either one of the two adjusting screws 102 and 103 is rotated by a predetermined amount so as to send out the movable member 101, and the reflecting mirror 100 is moved by a desired amount. After the movement, the reflection mirror 100 is firmly fixed to the frame 105 at a predetermined adjustment position by turning the other adjustment screw to be tightened. However, such a fine adjustment mechanism is achieved by the cooperation of the two adjustment screws 102 and 103, and makes fine adjustment difficult.
[0004]
The present invention has been made to solve the above-described problems, and in particular, an object of the present invention is to provide a suction nozzle position confirmation jig that facilitates the fine adjustment work of the reflection mirror.
[0005]
[Means for Solving the Problems]
The present invention relates to a suction nozzle position confirmation jig for confirming the position of the tip portion of the suction nozzle extending in the vertical direction in a state where the suction nozzle for sucking and conveying the electronic component is stopped at a predetermined position.
A light source for illuminating the tip of the suction nozzle;
A first imaging window portion that is positioned downwardly spaced from the suction surface of the suction nozzle and images the suction surface of the suction nozzle from below;
A second imaging window portion that is located laterally away from the suction surface of the suction nozzle and that images a portion including the suction surface of the suction nozzle from the side;
An optical path combining element provided at a merging position of the first optical path of the suction nozzle bottom image passing through the first imaging window and the second optical path of the suction nozzle side image passing through the second imaging window;
An image sensor provided on a third optical path extending from the optical path combining element;
A reflection mirror disposed in the middle of the optical path and attached to the movable member;
A housing that houses the optical path synthesis element, the imaging element, and the movable member;
In the adjustment direction of the reflecting mirror, the male screw part is screwed onto the movable member from one direction, and the bottom face and the top face of the head part are supported so as to be sandwiched between the wall surfaces of the head accommodating space formed in the housing. And a screw.
[0006]
This suction nozzle position confirmation jig is a jig for visually recognizing the position of the suction nozzle once stopped. The light source portion provided in the position recognition jig illuminates the tip of the suction nozzle, and actively creates reflected light from the suction nozzle. The position recognition jig includes a first imaging window that receives light reflected by the suction surface formed at the lower end of the suction nozzle extending in the vertical direction, and further reflects light reflected by the side surface of the tip portion of the suction nozzle. Has a second imaging window. Therefore, when the state of the suction surface is imaged by the bottom image captured from the first imaging window, the horizontal position of the suction surface can be recognized as an image based on the imaging result. Similarly, the position in the height direction of the suction surface can be recognized as an image by the side image captured from the second imaging window. In this way, the position of the suction surface of the suction nozzle can be inspected in a non-contact manner, and the work for confirming the position of the suction nozzle can be speeded up and simplified. Furthermore, by disposing a reflection mirror in the middle of the optical path, an optical path that matches the shape of the jig can be created in the jig. And this reflective mirror requires exact position adjustment so that an imaging position may not shift on an image sensor. Therefore, in the adjustment direction of the reflection mirror, the adjustment screw has its male screw portion screwed to the movable member from one direction, and the bottom surface and the top surface of the head portion are the head accommodating space formed in the housing. It is supported so as to be sandwiched between wall surfaces . Therefore, the reflecting mirror can be simply linearly moved back and forth in the adjusting direction so as to follow forward or reverse rotation of the adjusting screw, and the fine adjustment work of the reflecting mirror becomes extremely easy.
[0007]
In addition, it is preferable to provide guide means for guiding the movable member linearly in the adjustment direction. By adopting the guide means, the displacement in the direction other than the adjustment direction can be reduced as much as possible, thereby enabling stable position adjustment of the reflection mirror.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a suction nozzle position confirmation jig according to the present invention will be described in detail with reference to the drawings.
[0009]
The suction nozzle position confirmation jig 1 according to the present invention shown in FIG. 1 is used in place of a component supply device (also referred to as a “part cassette”) that is installed so as to be arranged on a stage of a component mounting machine. And is used for grasping the relative positional relationship between the parts cassette and the suction nozzle 3.
[0010]
The reason why such an operation is required is that, when picking up an electronic component from the parts cassette by the suction nozzle 3, whether or not the tip of the suction nozzle 3 is at a predetermined pickup position has a great influence on the mounting accuracy of the electronic component. Because it gives. That is, if the pickup position (electronic component suction position) of the suction nozzle 3 is deviated, the center of the electronic component cannot be sucked by the suction nozzle 3, and the suction failure of the electronic component and the variation of the suction position occur. . Therefore, the relative positional relationship between the parts cassette and the suction nozzle 3 is grasped by the jig 1, and the pickup position is adjusted on the stage side while moving and adjusting the stage of the mounting machine in the vertical and horizontal directions based on the imaging result. Do. That is, the jig 1 attempts to accurately position the tip of the suction nozzle 3 that has caused a relative displacement with respect to the stage at the pickup position.
[0011]
Therefore, the position confirmation jig 1 used for such adjustment has a metal housing 4, which is as thin as the width of the parts cassette to be closely arranged on the stage of the mounting machine. It has become. As shown in FIGS. 2 and 3, in the jig 1, a suction nozzle introduction region S corresponding to the pickup position (electronic component suction position) of the parts cassette is provided at the tip of the housing 4. The suction nozzle introduction region S is cut out in an L shape, and a first imaging window portion A is provided below the suction nozzle introduction region S at a position spaced downward from the suction surface 3a of the suction nozzle 3. At the rising portion of the suction nozzle introduction region S, a second imaging window B is provided at a position spaced laterally from the suction surface 3 a of the suction nozzle 3.
[0012]
The first imaging window A is provided with a first light source A1 that illuminates the suction surface 3a of the suction nozzle 3, and the second imaging window B also illuminates the side surface of the tip of the nozzle 3. A second light source unit B1 is provided. Therefore, when the first imaging window A is used in the state where the first and second light source parts A1 and B1 are turned on simultaneously, the state of the suction surface 3a can be reliably recognized from directly below, When the imaging window portion B is used, the state of the suction surface 3a can be reliably visually recognized from the side.
[0013]
In the first imaging window A, a glass dustproof window plate 11 is fitted in the housing 4. Further, eight light emitters (for example, LEDs) 12 constituting the first light source unit A <b> 1 are arranged, and these light emitters 12 are installed inside the window plate 11. Therefore, the suction nozzle 3 is reliably illuminated through the window plate 11, and the light reflected by the suction surface 3a of the suction nozzle 3 is reliably incident on the imaging window A along the first optical path L1 extending substantially vertically. Will do.
[0014]
Similarly, in the second imaging window portion B, a glass dustproof window plate 21 is fitted in the housing 4. In addition, around the viewing window 20, four light emitters (for example, LEDs) 22 constituting the second light source unit B <b> 1 are arranged, and these light emitters 22 are installed inside the window plate 21. Accordingly, the suction nozzle 3 is reliably illuminated through the window plate 21, and the light reflected by the tip of the suction nozzle 3 is reliably incident on the imaging window B along the second optical path L2 in the horizontal direction. become.
[0015]
In addition, a reflection mirror 26 accommodated in the housing 4 so as to be positioned on the first optical path L1 is installed directly under the window plate 11, and the first optical path L1 is bent at a right angle by the reflection mirror 26. Thus, the vertical optical path is converted into a horizontal optical path. Similarly, a reflection mirror 27 accommodated in the housing 4 so as to be positioned on the second optical path L2 is installed directly beside the window plate 21, and the second optical path L2 is set at a right angle by the reflection mirror 27. Bending to convert a horizontal light path to a vertical light path.
[0016]
An optical path synthesizing element (for example, a half-mirror built-in prism) 28 is fixed to the housing 4 at the joining position of the first optical path L1 and the second optical path L2 having substantially the same optical path length. The first optical path L1 and the second optical path L2 are merged to create a third optical path L3. As a result, when the image sensor (for example, CCD) 24 is arranged on the third optical path L3, it is possible to capture two types of images with one image sensor 24.
[0017]
By employing such an optical path synthesizing element 28, it is not necessary to individually provide the image sensor 24 corresponding to each of the optical paths L1 and L2, the number of the image sensors 24 can be reduced, and the configuration of the imaging system is also achieved. It will be easy. Note that a unitized imaging lens 29 is installed in the housing 4 on the third optical path L3 between the optical path synthesis element 28 and the imaging element 24, and the light passing through the imaging lens 29 is reflected by a reflection mirror. A configuration in which the light is incident on the image sensor 24 via 30 is employed.
[0018]
Furthermore, a rotatable shutter (not shown) is provided in the housing 4 for appropriately switching the first optical path L1 and the second optical path L2 reaching the optical path combining element 28 in front of the optical path combining element 28. It has been. This shutter enables the first and second optical paths L1 and L2 to be selectively opened and closed by the shutter based on the operation of the drive motor.
[0019]
Here, as shown in FIG. 3, the reflecting mirror 26 is bonded and fixed to a movable member 40 that reciprocates up and down, and the movable member 40 has a male adjustment screw 41 that extends in the adjustment direction. The screw portion 42 is screwed from one direction. Specifically, the male screw portion 42 of the adjustment screw 41 is inserted into the through hole 43 formed in the housing 4 from below. Then, the head portion 45 of the adjustment screw 41 is accommodated in the head accommodation space 44 formed in the housing 4 so as to communicate with the through hole 43, whereby the bottom surface 45 a and the top surface 45 b of the head portion 45 are accommodated in the head. It is supported by the wall surface of the space 44. This prevents the adjustment screw 41 from coming off and allows the reflection mirror 26 to be finely adjusted with one adjustment screw 41.
[0020]
Further, the housing 4 is formed with a tool insertion hole 46 for communicating between the outside and the head accommodating space 44, and the head portion 45 is provided with a hexagonal hole 47 for a wrench. Then, the head portion 45 is rotated in a predetermined direction by a hexagon wrench 49 inserted into the tool insertion hole 48 from the outside. Therefore, when finely adjusting the reflecting mirror 26 up and down, the movable member 40 is gradually raised or lowered by the pitch of the male screw portion 42 by rotating the adjusting screw 41 in a desired direction while turning the hexagon wrench 49 in one direction. Descend.
[0021]
Further, guide means 50 for linearly guiding the movable member 40 is provided. The guide means 50 is screwed to the movable member 40 and extends in two directions perpendicular to the adjustment direction. 51. The male screw portion 54 of each guide screw 51 passes through each elongated hole 53 formed in the housing 4 so as to extend in the adjustment direction, and the head portion 52 of each guide screw 51 is exposed to the outside of the housing 4. Yes. During fine adjustment of the reflection mirror 26, the guide screw 51 slides along the elongated hole 53, so that the displacement in the direction other than the adjustment direction is reduced as much as possible. Is possible. Further, after the adjustment work of the reflection mirror 26 by the adjustment screw 41 is completed, each guide screw 51 is screwed into the movable member 40 so as to press the head portion 52 against the wall surface of the head accommodating space 58, thereby moving the movable member 40. Is firmly fixed at the adjusted position.
[0022]
The suction nozzle position confirmation jig according to the present invention is not limited to the above-described embodiment. For example, the fine adjustment mechanism described above may be applied not only to the reflection mirror 26 but also to the reflection mirrors 27 and 30. Further, although the fine adjustment in the vertical direction of the reflection mirror 26 has been described, the adjustment mirror 41 can be extended in the left-right direction (horizontal direction) to finely adjust the reflection mirror 26 in the left-right direction.
[0023]
【The invention's effect】
Since the suction nozzle position confirmation jig according to the present invention is configured as described above, the following effects are obtained. That is, in the suction nozzle position confirmation jig for confirming the position of the tip portion of the suction nozzle extending in the vertical direction with the suction nozzle that sucks and conveys the electronic component being stopped at a predetermined position, A light source unit that illuminates the tip portion, a first imaging window unit that is positioned downward and away from the suction surface of the suction nozzle and images the suction surface of the suction nozzle from below, and a side from the suction surface of the suction nozzle A second imaging window portion that is located apart and that images a portion including the suction surface of the suction nozzle from the side, a first optical path and a second imaging window portion of the suction nozzle bottom image passing through the first imaging window portion And an image sensor provided on a third optical path extending from the optical path synthesizing element, attached to the movable member in the middle of the optical path. and reflecting mirrors, the optical path combining element A housing for accommodating the image element and the movable member, in the adjustment direction of the reflecting mirror, the head housing to a male screw portion is screwed from one direction to the movable member, and a bottom surface and a top surface of the head portion, formed in the housing With the adjustment screw supported so as to be sandwiched between the wall surfaces of the space, the fine adjustment operation of the reflection mirror can be easily performed.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a suction nozzle position confirmation jig according to the present invention.
FIG. 2 is an enlarged perspective view of a main part of the jig shown in FIG.
FIG. 3 is an enlarged cross-sectional view of a main part of the jig shown in FIG.
FIG. 4 is a cross-sectional view showing a reflection mirror adjustment mechanism applied to a conventional position confirmation jig for a suction nozzle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Position confirmation jig | tool, 3 ... Adsorption nozzle, 3a ... Adsorption surface, 24 ... Imaging element, 26 ... Reflection mirror, 28 ... Optical path composition element, 40 ... Movable member, 41 ... Adjustment screw, 42 ... Male screw part, 45 ... head part, 45a ... bottom face of head part, 45b ... top face of head part, 50 ... guide means, A1, B1 ... light source part, A ... first imaging window part, B ... second imaging window part, L1 ... 1st optical path, L2 ... 2nd optical path, L3 ... 3rd optical path.

Claims (2)

In the suction nozzle position confirmation jig for confirming the position of the tip portion of the suction nozzle extending in the vertical direction with the suction nozzle for sucking and transporting the electronic component stopped at a predetermined position,
A light source unit that illuminates the tip of the suction nozzle;
A first imaging window portion that is positioned to be spaced downward from the suction surface of the suction nozzle and that images the suction surface of the suction nozzle from below;
A second imaging window portion that is located laterally away from the suction surface of the suction nozzle and that images a portion including the suction surface of the suction nozzle from the side;
An optical path combining element provided at a merging position of the first optical path of the suction nozzle bottom image passing through the first imaging window and the second optical path of the suction nozzle side image passing through the second imaging window;
An image sensor provided on a third optical path extending from the optical path combining element;
A reflection mirror disposed in the middle of the optical path and attached to the movable member;
A housing that houses the optical path combining element, the imaging element, and the movable member;
In the adjustment direction of the reflection mirror, the male screw part is screwed to the movable member from one direction, and the bottom surface and the top surface of the head part are supported so as to be sandwiched between the wall surfaces of the head housing space formed in the housing. A suction nozzle position confirmation jig, characterized by comprising:   The suction nozzle position confirmation jig according to claim 1, further comprising guide means for linearly guiding the movable member in the adjustment direction.

Images