JP2010275076A - Light reflecting type component detecting system and component carrying device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light reflecting type component detecting system for facilitating the setting of discriminating conditions depending on detection environment while actualizing the certainty of discrimination. <P>SOLUTION: The light reflecting type component detecting system 110 includes a light receiving element 117 for detecting the amount of reflected light from a determined detection range Sp set in a carrying passage 102 through which components being carried pass, and a discriminating means 120 for discriminating the amount of the reflected light detected by the light receiving element in accordance with predetermined discriminating conditions. Behind detection range, an operation member 114 is arranged which has a light reflecting surface 114a. The operation member is operated to change the position or attitude of the light reflecting surface so that the amount of the reflected light from a background is changed when the components are not arranged in the detection range. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a component detection system and a component transport apparatus using the same, and more particularly to a structure of a component detection system suitable for optically identifying a component.

  In general, in a component supply device such as a parts feeder or a component transport device, a component that determines the type, shape, orientation, etc. of the component being transported, and selects the component or changes the posture according to the determination result A sorting unit, a component reversing unit, and the like are provided. A component detection system for detecting the type, shape, orientation, etc. of the component is installed in these component selection unit and component reversing unit. As this component detection system, those equipped with an optical sensor for optically detecting a component are widely used.

  As a component detection system, as described in Patent Document 1 below, a reflected light type photoelectric sensor that detects a reflected light amount of light irradiated on a component by a light emitting element by a light receiving element is used. 2. Description of the Related Art A light reflection type component detection system that performs discrimination by comparing with an appropriately set threshold value is known. For example, there is one that is often used in a component supply apparatus in which an optical fiber is connected to a photoelectric sensor main body including a light emitting element and a light receiving element, and a lens unit is connected to the tip of the optical fiber. In this system, the light emitted from the light emitting element can be condensed by the lens unit at the tip to form a fine light spot, and the light reflected from the light spot can be selectively detected. The detection target can be detected with high accuracy.

  In such a light reflection type component detection system, a process for performing a predetermined process when the detected light amount exceeds the threshold value by comparing the detected light amount of the reflected light detected by the photoelectric sensor with a predetermined threshold value. There are known a light-on type system that outputs a command and a dark-on type system that outputs a processing command for performing a predetermined process when the detected light amount falls below a threshold value. The light-on type system is used when the amount of reflected light from a component to be subjected to predetermined processing increases, and the dark-on type system is used when the amount of reflected light from a component to be subjected to predetermined processing is small. As an example, a description will be given of a component detection system that is suitable for a component selection unit that excludes a component in a defective posture from among conveyance components. When the reflectance of the light irradiation surface of a component in a defective posture is high, a light-on type system Is used, and a dark-on type system is used when the reflectance of the light irradiation surface of a component in a defective posture is low.

JP-A-2005-010111

  By the way, in the conventional light reflection type component detection system, for example, when the posture of a component is detected and a component in a specific posture is to be excluded, when the reflectance of the detection surface of a component in a specific posture is high, Usually, the light-on type system is selected, and the dark-on type system is selected when the reflectance of the detected surface is low. Therefore, when changing the posture of a part to be excluded, the system mold may be changed. However, in any type of system, the part from the surface of the transport truck obtained when there is no part on the transport truck. The reflected light amount (background detected light amount) must be configured so that it can be distinguished from the reflected light amount from the detected surface of the component. Normally, if the detected light amount of the background is suitable for one type of system, There is a problem that it is difficult to change the type of the system because it is often not compatible with the type system.

  In general, in order to determine the attribute of a part, it is necessary to set a determination condition such as a threshold value according to the detection environment. This setting is not limited to the part detection condition as described above. Since it is necessary to consider the optical effects of the background of the transport track when no parts are present, it is difficult to set the detection conditions depending on the detection environment. There was a problem that it was impossible to secure.

  Therefore, the present invention solves the above-described problems, and its problem is to facilitate the setting of discrimination conditions according to the detection environment and to obtain the certainty of discrimination in the light reflection type component detection system. .

  In view of such circumstances, the light reflection type component detection system of the present invention includes a light receiving element that detects an amount of reflected light from a predetermined detection range set in a conveyance path through which a component to be conveyed passes, In a light reflection type component detection system comprising: a discriminating means for discriminating the amount of reflected light detected by an element based on a predetermined discriminating condition, an operation member having a light reflecting surface is disposed behind the detection range In addition, the amount of reflected light from the background when the component is not arranged in the detection range is changed by operating the operating member to change the position or posture of the light reflecting surface. It is characterized by. According to this, when the component is not arranged in the detection range by operating the operation member arranged behind the detection range through which the conveyed component passes and changing the position or posture of the light reflecting surface Since the amount of reflected light from the background changes, it is possible to easily change the optical conditions of the detection environment by changing the amount of reflected background by the operation of the operation member. The determination conditions can be easily set and the certainty of the determination can be ensured. In particular, it becomes easy to switch between light-on control and dark-on control, which will be described later.

  In one aspect of the present invention, an optical opening that opens in a wall surface disposed behind or in front of the passage region of the component in the detection range is provided, and the position or posture of the light reflecting surface is within a changeable range. The light reflected by the optical surface can be detected by the light receiving element through the optical opening at at least one position or posture. According to this, since the reflected light from the light reflecting surface can be detected by the light receiving element through the optical opening, the passing range of the reflected light detected by the light receiving element can be limited. It is possible to increase the sensitivity by increasing the contribution of the light receiving element to the detected light amount, or to increase the change width of the detected light amount when the position or posture of the light reflecting surface is changed.

  In another aspect of the present invention, the operating member is configured such that a distance along the detection optical axis of the detection range and the light reflecting surface can be changed. According to this, when the distance changes, the detection sensitivity of the light receiving element for the reflected light emitted from the detection range on the transport path and the detection sensitivity of the light receiving element for the reflected light emitted from the light reflecting surface change. For this reason, it is possible to increase or decrease the amount of light detected in the background.

  In this case, a condensing lens that guides the reflected light to the light receiving element is disposed between the detection range and the light receiving element, and the operating member maintains the posture of the light reflecting surface of the light receiving element. It is preferable to be movable along the detection optical axis. According to this, since the operation member is configured to be movable along the detection optical axis while maintaining the posture of the light reflecting surface, a simple moving mechanism can be provided and reflected light from the light reflecting surface can be provided. The amount of reflected light detected by the light receiving element through the condenser lens is determined by the light reflecting surface depending on the optical characteristics (focal length) of the condenser lens set according to the reflected light from the detection range. Therefore, the detected amount of reflected light from the background can be reliably increased or decreased by the movement of the operating member.

  In another aspect of the invention, the operating member is configured such that an angle of the light reflecting surface with respect to the detection optical axis can be changed. According to this, the amount of reflected light of the background can be increased or decreased reliably by changing the angle of the light reflecting surface with respect to the detection optical axis.

  In the above case, it is preferable that the operating member is configured such that the light reflecting surface is movable along a surface intersecting the detection optical axis. According to this, the detected light quantity of the light receiving element can be greatly changed by removing the light reflecting surface from the detection optical axis. At this time, in the case of providing the above-described optical aperture, it can be configured so that the light reflecting surface is also removed from the aperture range of the optical aperture by removing the light reflecting surface from the detection optical axis. It can be increased or decreased.

  The component conveying apparatus according to the present invention includes a conveying body provided with the conveying path, a conveying means for moving the component on the conveying path, and the light reflection type component detection system including the detection range on the conveying path. It is characterized by comprising. Examples of such a component conveying device include, but are not limited to, a vibration type component conveying device that includes a vibration mechanism that vibrates the conveying member as conveying means and conveys conveying components by vibration of the conveying member. Instead, it is only necessary to be able to transport any part along the transport path, such as a conveyor belt including a transport belt and its driving mechanism as a transport means.

  According to the present invention, in the light reflection type component detection system, the determination condition can be easily set and the certainty of the determination by operating the operation member having the light reflection surface to change the position or the posture. It is possible to achieve an excellent effect that can be secured.

The fragmentary sectional view which shows the state which attached the light reflection type | mold component detection system in the 1st state of 1st Embodiment which concerns on this invention to the component conveyance apparatus (bowl type | mold part feeder). The fragmentary sectional view which shows the light reflection type component detection system in the 2nd state of the light reflection type component detection system of 1st Embodiment. The partial perspective view which shows a part of component conveying apparatus of 1st Embodiment. FIG. 3 is an enlarged partial cross-sectional view illustrating a structure in the vicinity of a conveyance track of the light reflection type component detection system according to the first embodiment. The figure which shows a mode that the light reflection type component detection system of 1st Embodiment was seen from the light detection side. The top view, the left view, the front view, and the rear view which show in the state which has arrange | positioned the components which are the detection target of 1st Embodiment on the conveyance track. The fragmentary sectional view which shows the state which attached the light reflection type | mold component detection system of 2nd Embodiment to the component conveyance apparatus. The fragmentary sectional view of 2nd Embodiment. The fragmentary sectional view of 3rd Embodiment. Explanatory drawing which shows the optical state of 1st Embodiment. Explanatory drawing which shows the optical state of 4th Embodiment. Explanatory drawing which shows the optical state of 5th Embodiment.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic partial sectional view when the operating member of the light reflection type component detection system 110 of the first embodiment is in the first position, and FIG. 2 is when the operating member of the first embodiment is in the second position. FIG. 3 is a schematic perspective view showing a mounting state of the light-reflective component detection system 110 with respect to the conveyance body, FIG. 4 is an enlarged vertical sectional view of the component selection unit 103, and FIG. FIG. 6 is an enlarged inner view of the sorting unit 103.

  In the present embodiment, a spiral conveyance track 102 is provided on a bowl-shaped conveyance body 101 provided in a component conveyance device 100 including a bowl-type parts feeder partly shown in FIG. The transport track 102 includes a stepped portion formed on the inner surface 101 a of the transport body 101, and the transport track 102 includes a first transport surface 102 a formed by a part of the inner surface 101 a inclined to the inner side of the transport body 101. The second conveyance surface 102b is formed of a step surface that intersects the first conveyance surface 102a and is inclined horizontally or oppositely. However, the present embodiment can also be applied to any other component conveying device having a conveyance path, such as a linear part feeder provided with a linear conveyance track corresponding to the conveyance track 102.

  A part sorting unit 103 is provided in a part of the transport track 102, and a part detection system 110 is configured at the part sorting unit 103 and a position adjacent thereto. The component detection system 110 includes a lens unit 112 that is supported by a support arm 111 that is fixed to the conveyance body 101 and that is fixed so as to face the component selection unit 103 obliquely from above. The lens unit 112 is connected to the ends of the optical fibers 115 and 116. Inside the lens unit 112, an illumination light guide connected to the optical fiber 116 and a plurality of detection guides connected to the optical fiber 115 are distributed around the light guide for illumination. The light portion is configured coaxially, and a condensing (light projecting and light receiving) lens (convex lens) or a lens group is provided on the tip side thereof.

  The optical fiber 115 is connected to a light receiving element 117 such as a photodiode so that light incident on the optical fiber 115 can be detected by the light receiving element 117. The optical fiber 116 is connected to a light emitting element 118 such as a light emitting diode, and is configured to propagate light emitted from the light emitting element 118 toward the lens unit 112. The illumination light emitted from the light emitting element 118 is emitted from the lens unit 112 and forms an illumination spot Sp described later on the component selection unit 103. On the other hand, the reflected light obtained by reflecting the illumination light by the component selecting unit 103 is collected by the lens unit 112 and detected by the light receiving element 117. In the case of the present embodiment, the optical axis of the illumination light (hereinafter simply referred to as the illumination optical axis) extends toward the component sorting unit 103, and the optical axis Xd of the detection light (see FIG. 4, hereinafter simply referred to as the detection optical axis). Is consistent with.

  The transport body 101 is provided with a recess 104 corresponding to the component selection unit 103. The concave portion 104 reaches from the outer peripheral side of the transport body 101 to the component sorting section 103 of the transport track 102. In the case of the illustrated example, although not particularly limited, the concave portion 104 includes a concave groove portion that is vertically formed in a slit shape along the inclined direction of the inner surface 101a toward the component sorting portion 103 of the transport track 102, and It is comprised in the L-shape which has a side extension part extended from the upper part of a ditch | groove part to the side.

  A mounting block 105 is fitted and fixed to the recess 104. As shown in FIG. 5, the mounting block 105 is inserted into the concave groove portion, and a track fitting portion 105 </ b> A that fits into a portion where the first conveyance surface 102 a of the conveyance track 102 is missing in the conveyance body 101 by the concave groove portion. And an overhanging portion 105B projecting sideways from the upper end of the track fitting portion 105A. The overhang portion 105B is inserted into the lateral extension portion of the recess 104, and is fixed to the transport body 101 by a fixing member 106 such as a bolt as shown in FIG. In FIG. 5, fixing means such as bolts and washers are omitted.

  As shown in FIG. 4, a through hole 105 a penetrating from the outside of the mounting block 105 to the inner surface 105 t is provided in the lower part of the mounting block 105. The through hole 105a is opened on the surface 105t constituting the first conveying surface in the component sorting unit 103, and the opening 105b corresponds to the optical opening. In the illustrated example, the inner portion (opening portion 105b side portion) of the through hole 105a has a small diameter (opening diameter Op), and the opposite outer portion has a larger diameter (inner diameter Dp) than the opening portion 105b. It has a hole shape. The opening diameter Op is not less than the spot diameter (Ds) of the irradiation spot Sp of the illumination light irradiated from the lens unit 112, and the opening 105b is formed so as to completely include the irradiation spot Sp. However, the opening 105b may be smaller than the irradiation spot Sp as long as the detection sensitivity can be sacrificed to some extent. When the irradiation spot Sp is irradiated onto a component on the transport track, the spot range substantially coincides with a detection range in which the component detection system 110 detects reflected light from the component.

  A driving member 113 made of an air cylinder or the like is attached to the outer portion of the through hole 105a, and this driving member 113 can move the operating member 114 made of a rod or the like in the axial direction of the through hole 105a which is the protruding and retracting direction. It is configured. The distal end portion of the operating member 114 is configured to be able to protrude to the vicinity of the opening 105b, and the distal end surface is a light reflecting surface 114a that reflects light. However, the light reflecting surface 114a only needs to be a surface that can reflect light with an appropriate reflectance, and does not necessarily have a high reflectance like a mirror surface. The diameter Rp of the light reflecting surface 114a is equal to the outer diameter of the operating member 114 in the illustrated example, and is slightly smaller than the inner diameter Op of the opening 105b, so that the operating member 114 smoothly passes through the through hole 105a in the direction of the detection optical axis Xd. It is configured to be movable.

  The light reflecting surface 114a is disposed on the side opposite to the lens unit 112 with respect to the opening 105b, and can move to a position close to the opening 105b as shown by a two-dot chain line in FIG. It is driven so as to stay in the range drawn from 105b. This is because if the light reflecting surface 114a protrudes from the opening 105b and is convexly arranged on the surface 105t which becomes the conveying surface following the first conveying surface 102a in the component sorting unit 103, the conveyance of the component P is hindered. Because it becomes. Further, when the light reflecting surface 114a is disposed along the opening surface of the opening 105b and the surface 105t and the light reflecting surface 114a are disposed on the same plane, the conveyance of the component P itself is not hindered. However, since the light reflecting surface 114a frequently comes into contact with the component P to be transported, the light reflecting surface 114a is contaminated and the light reflectance fluctuates, resulting in a decrease in discrimination accuracy. is there.

  The driving member 113 drives the operating member 114 and can switch the operating member 114 between the first position and the second position. The first position is the position shown in FIG. 1 and the position shown by the solid line in FIG. 4, and the light reflecting surface 114 a is the farthest away from the opening surface of the opening 105 b on the side opposite to the lens unit 112. On the other hand, the second position is the position shown in FIG. 2 and the position shown by the two-dot chain line in FIG. 4, and is the position where the light reflecting surface 114a is closest to the opening surface (surface 105t) of the opening 105b. In the second position, the gap G between the light reflecting surface 114a and the opening surface is set for the reason described above. The interval G depends on the size of the part and the opening area of the opening 105b, but is generally preferably in the range of 0.1 mm to 2.0 mm. If the gap G is larger than this range, the distance between the detected surface of the component P, which will be described later, and the light reflecting surface 114a increases. Therefore, when the state of the component P is detected by dark-on, the detected surface of the component P is detected. Thus, it is difficult to ensure a difference between the detected light amount of the light receiving element 117 and the detected light amount corresponding to the reflected light amount of the background when the component P is not present. On the other hand, when the gap G is smaller than the above range, contact with the component P is likely to occur, and a part of the constituent material of the component P, for example, solder of the electrode portion, adheres to the light reflecting surface 114a and reflects the reflectance. It becomes easy to cause the fall of.

  In the case of this embodiment, the axis of the through hole 105a coincides with the detection optical axis Xd (same as the irradiation optical axis) of the lens unit 112. The operating member 114 is configured to be movable along the detection optical axis Xd while maintaining the posture of the light reflecting surface 114a constant. In addition, the side of the through hole 105 a is partially opened at the bottom bottom surface of the mounting block 105. This opening is closed by the lower bottom surface of the mounting block 105 coming into contact with the inner bottom surface of the recess 104 of the transport body 101. Thus, by removing the mounting block 105, cleaning such as inspection of the inside of the through hole 105a and removal of dust and the like can be easily performed.

  A vertical hole 105c, a horizontal hole 105d, and a recess 105e constituting an air supply path are provided on the upper portion of the mounting block 105. A pneumatic connector 107 is attached to the opening of the vertical hole 105c, and an air tube (not shown) or the like is connected to the opening to supply compressed air to the air supply path. In addition, a pneumatic control plate 108 is attached to the recess 105e formed on the surface of the mounting block 105, and the pneumatic control plate 108 is fixed on the mounting block 105 by a fixing member 109 such as a bolt.

  A notch part 108 a is formed in the lower part of the pneumatic control plate 108, and the notch part 108 a is configured to open the air supply path to the conveying surface of the component sorting part 103 through the recess 105 e. The pneumatic opening (opening of the air supply path) constituted by the notch 108a is adjacent to the opening 105b. The pneumatic opening formed by the notch 108a is set at a position where a predetermined pneumatic action can be applied to the component P. In the example shown in the drawing, a pneumatic opening formed by a notch 108a is disposed above an optical opening formed by the opening 105b. This is because the air pressure is applied to the upper part of the part P that has reached the part selection unit 103 to reliably remove the part P from the transport track 102. In addition, a pneumatic opening formed of a notch portion 108a is provided at a position shifted in the transport direction (in the illustrated example, on the opposite side of the transport direction, or may be the most transport side) from the optical opening formed of the opening 105b. It has been. This optimizes the positional relationship between the detection range at the time of detection (for example, the position of the irradiation spot Sp on the part) and the pneumatic action point at the time of processing, and the situation where the processing of the part P cannot be performed or the processing is insufficient. This is to prevent the occurrence of the situation. Thus, in the illustrated example, the notch 108a is formed obliquely above the opening 105b in the conveying direction of the component P. In the present embodiment, the air flow is blown from the pneumatic opening to the part P, so that the part P is removed from the transport track 102 as indicated by arrows in FIGS. In FIG. 5, the part position indicated by a two-dot chain line in the figure is an assumed position at the time of detection.

  As shown in FIG. 1, in this embodiment, the detection signal of the light receiving element 117 is output to the main control unit 120 that can be realized by various configurations such as a control circuit, a programmable controller, a microcomputer, and an MPU (microprocessor unit). The The main control unit 120 sends control signals to the control drive units 121 and 122 such as electromagnetic valves, and controls the position of the operation member 114 by the drive member 113 and whether or not air pressure is supplied to the air supply path. In the illustrated example, the driving member 113 is an air cylinder so that the operating member 114 is driven by air pressure. However, the driving member 113 may be configured in various configurations such as an electric motor or a hydraulic circuit. The control drive unit 121 can also be appropriately configured according to the configuration of the drive member 113. The main control unit 120 constitutes a determination unit of the present invention. The control drive unit 121 and the air supply path constitute a component processing unit, the main control unit 120 and the control drive unit 122 constitute a control unit for the operation member 114, and the control drive units 121 and 122 and the drive member 113 operate. The drive means of the member 114 is comprised.

  In the present embodiment, when the light reflecting surface 114a of the operating member 114 is at the first position, the illumination light emitted from the lens unit 112 enters the opening 105b, and the light reflecting surface 114a is within the opening 105b. However, since the distance from the opening 105b to the light reflecting surface 114a is long, the amount of light detected by the light receiving element 117 of the reflected light reflected by the light reflecting surface 114a is determined by the light reflecting surface 114a being the opening 105b. It becomes smaller than the case where it is in the 2nd position near. For example, as shown in FIG. 10, when the irradiation spot irradiated with the illumination light Li substantially constitutes a detection range, a component P (on the transport surface of the component sorting unit 103 in the detection range ( If the reflected light Lrp from the surface to be detected which is the surface of the dot-dash line in the figure is configured to form an image on the light receiving surface of the light receiving element 117, it is arranged at a second position close to the surface to be detected. The reflected light Lr2 reflected by the light reflecting surface 114a of the operating member 114 (solid line in the figure) is efficiently detected by the light receiving surface of the light receiving element 117, and the amount of light detected by the light receiving element 117 does not decrease so much. On the other hand, the reflected light Lr1 reflected by the light reflecting surface 114a of the operating member 114 (two-dot chain line in the figure) disposed at the first position away from the detected surface is at a position away from the light receiving surface of the light receiving element 117. Since it converges, the amount of light detected by the light receiving element 117 is greatly reduced.

  In the case of the present embodiment, for the reason described above, the light receiving element 117 based on the reflected light of the light reflecting surface 114a when the light reflecting surface 114a is disposed at the first position and when the light reflecting surface 114a is disposed at the second position. The detected light amount greatly increases or decreases. Therefore, by moving the light reflecting surface 114a of the operation member 114, the detected light amount of the light receiving element 117 when the component P is not arranged in the detection range, that is, the detected value of the background is controlled by the position of the operation member 114. be able to.

  FIG. 6 is an explanatory diagram illustrating an example of a component P to be detected in the present embodiment. In the example illustrated in FIG. 6, the component P is configured in a substantially rectangular parallelepiped shape, and includes a front surface Pa and a back surface Pb, and four side surfaces provided therebetween. The component P shown in the figure is a surface-mount type crystal resonator, and most part of the surface Pa is constituted by a lid P1 of a component container and has a high reflectance. On the other hand, a plurality of electrodes Pe are provided on the back surface Pb, and these electrodes Pe are made of a metal such as solder or gold, but the other parts are component containers made of a ceramic material having a low reflectance. The exposed portion Pn is exposed.

  For example, when the component sorting unit 103 determines the posture with the front surface Pa facing up and the posture with the back surface Pb facing up on the transport track 102 of the component P, the irradiation spot Sp (detection range) is determined. As shown in FIG. 6, it sets so that it may arrange | position to the surface part of the cover body Pl of the surface Pa, and the surface part of the exposed part Pn of the back surface Pb. In this way, it is possible to determine both postures of the component P based on the difference in the amount of light detected by the light receiving element 117 in accordance with the difference in reflectance between the two surface portions. In this case, one of the front surface Pa and the back surface Pb is used as the detected surface, and when the detected surface is detected by the light reflection type component detection system 110, the main control unit 120 shown in FIG. When the part 121 is controlled and the control driving unit 122 starts supplying air to the supply path so that the component P is subjected to the pneumatic action through the pneumatic opening formed by the notch 108a, The parts P that have been subjected to the pneumatic action can be removed from the transport track 102.

  Here, whether to set the detected surface as the front surface Pa or the back surface Pb is determined by a user request or the like. In this embodiment, in either case, the detected light amount of the light receiving element 117 when the detected surface is detected is the detected light amount when the other surface of the component P is detected, and the component P is the component sorting unit 103. It must be configured so that it can be identified with respect to any of the detected light amounts (hereinafter simply referred to as background detected light amounts).

  In the present embodiment, as a method for determining the detected surface, a light-on control for performing processing when the detected light amount of the detected surface is larger than both the detected light amount of the other surface and the detected light amount of the background, Either dark-on control is performed to perform processing when the detected light amount of the detected surface is lower than either the detected light amount of the other surface or the detected light amount of the background.

  In the light-on control, in the case of the component P shown in FIG. 6, the surface to be detected is a surface Pa having a high reflectance, and the component P having a posture in which the surface Pa faces the lens unit 112 is a processing target. . In this case, since the reflectance of the back surface Pb is lower than that of the front surface Pa, there is no problem in terms of the amount of detected light. Further, with respect to the detected light amount of the background, the operating member 114 may be disposed at the first position in order to make it lower than the surface Pa.

  On the other hand, in the dark-on control, the surface to be detected is a back surface Pb having a low reflectance, and a component P having a posture in which the back surface Pb faces the lens unit 112 is a processing target. In this case, since the front surface Pa has a higher reflectance than the rear surface Pb, there is no problem in terms of the amount of detected light. Further, with respect to the detected light amount of the background, the operating member 114 may be arranged at the second position in order to make it higher than the back surface Pb.

  As described above, in this embodiment, the light-on control and the dark-on control can be switched and realized only by switching the operation member 114 between the first position and the second position. This switching operation can be easily realized by moving the operation member 114 by the drive member 113 via the control drive unit 121 based on a control signal from the main control unit 120, for example. Furthermore, not only the switching of the control mode described above, but in general, the amount of reflected light in the background can be easily adjusted by the movement of the operation member 114, so that it is easy to set a determination condition such as a threshold, and the determination It is possible to improve the certainty.

  In the present embodiment, the light reflected by the light reflecting surface 114a can be detected by the light receiving element 117 through the opening 105b (optical opening) at at least one position in the moving range of the operating member 114. Thus, the detection path of the reflected light detected by the light receiving element 117 becomes more limited, and thus the detection sensitivity of the reflected light by the light reflecting surface 114a in the light receiving element 117 is increased by reducing the influence of external light and the like. It is also possible to increase the amount of change in the amount of light detected by the light receiving element 117 when the position of the light reflecting surface 114a is changed.

  Further, in the present embodiment, a lens unit 112 including a condenser lens that guides the reflected light from the component P and the light reflecting surface 114a to the light receiving element 117 is provided, and the operating member 114 is in the posture of the light reflecting surface 114a. Is maintained along the detection optical axis Xd, so that when the light reflecting surface 114a moves along the detection optical axis Xd, the convergence position of the reflected light by the light reflecting surface 114a is also detected by the detection optical axis. Since it moves along Xd, the amount of light detected by the light receiving element 117 can be greatly increased or decreased by the movement of the light reflecting surface 114a. Therefore, it becomes possible to set the detection environment according to the optical condition more easily and in a wide range by operating the operation member 114.

  In the above-described embodiment, the example in which the operation member 114 is switched between the first position and the second position has been described. However, in general, in order to control the amount of reflected light from the background, two positions are used. It is not limited to switching. Therefore, it is of course possible to adjust the operation member 114 to an appropriate position preferable for discriminating within the predetermined operation range (movement range).

  Next, a second embodiment according to the present invention will be described with reference to FIGS. In this embodiment, only the processing contents for the component P are different, and the other parts are basically the same as those in the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

  In the present embodiment, as shown in FIG. 8, a light reflection type component detection system 110 ′ configured similarly to the first embodiment is formed in the component reversing unit 103 ′. As shown in FIG. 7A, the component reversing portion 103 ′ is adjacent to the component passage portion 103A provided along the conveyance track 102 and the side orthogonal to the conveyance direction of the component passage portion 103A. And a component transfer unit 103B. The component passage portion 103A has the same cross-sectional shape as the other conveyance tracks 102, and the inclined first conveyance surface 103a1 that is at least partially constituted by the surface 105t of the mounting block 105 as described above, and the first conveyance surface 103a1. It has the 2nd conveyance surface 103a2 which opposed to the conveyance surface 103a1 and inclined in the reverse direction. The second conveyance surface 103a2 has a width smaller than the thickness of the component P, and the component P is configured to easily fall over the component transfer unit 103B beyond the second conveyance surface 103a2. On the other hand, the component transfer unit 103B is opposed to the first conveyance surface 103a1 and is inclined opposite to the first conveyance surface 103b1, and the first conveyance surface 103b1 is opposed to and opposite to the first conveyance surface 103b1. It has a second transport surface 103b2 that is inclined and adjacent to the second transport surface 103a2 and that inclines in the opposite direction in a back-to-back manner.

  Then, the part P that has been transported in the transport track 102 reaches the part passing part 103A of the part reversing part 103 ′ as shown in FIG. 7A, and the part P is processed as in the first embodiment. When it is determined that the component is to be performed, the component P falls from the component passing portion 103A to the component transfer portion 103B as shown in FIG. 7B due to the pneumatic action from the pneumatic opening (not shown). Are transferred. As shown in FIG. 7C, the component reversing unit 103 ′ is provided with a component merging unit 103C disposed on the downstream side of the component passing unit 103A and the component transfer unit 103B. The conveyance surface 103c is formed in a concave arc shape that does not restrict the component posture. On this conveyance surface 130c, the component that has passed through the component passage portion 103A as it is and the component that has been conveyed after being transferred to the component transfer portion 103B are conveyed together. Then, on the further downstream side of the transport track 102, as shown in FIG. 7D, the component P is transported again in a state in which the posture is restricted. In this case, for the component P transferred to the component transfer unit 103B, the posture shown in FIG. 7A before being processed by the component reversing unit 103 ′ and the posture shown in FIG. Will be reversed. In addition, the structure of the conveyance path | route for performing component inversion processing is not restricted to the said structure, What is necessary is just the structure comprised so that the front and back of components may be reversed as a result. For example, the second conveying surfaces 103a2 and 103b2 having the sectional structure shown in FIGS. 7A and 7B may be omitted, and a V-shaped sectional structure including only the first conveying surfaces 103a1 and 103b1 may be used.

  Next, a third embodiment according to the present invention will be described with reference to FIG. In this embodiment, the configuration of the light reflection type component detection system is different from the above-described embodiment. Since the other parts are basically the same as those in the second embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted. Although the present embodiment is configured based on the second embodiment, it is obvious that the following can be similarly applied to the first embodiment by replacing the following component reversing unit 103 ′ with the component sorting unit 103.

  In the component detection system 110 ″ of the present embodiment, a lens unit 112 ′ similar to that of the first embodiment is moved downward (conveyed) with respect to the component reversing unit 103 ′ instead of the driving member 113 and the operation member 114 of the first embodiment. The drive member 113 ′ and the operation member 114 ′ driven by the drive member 113 ′ and the operation member 114 ′ driven by the mount block 105 are mounted in a posture facing from the rear (from the back of the surface). Is attached to the conveyance body 101 in the same manner as the lens unit 112 of the first embodiment in a posture facing from above (toward the conveyance surface). Here, the component reversing portion 103 of the operating member 114 ′. The surface facing ′ is a light reflecting surface 114a ′ similar to the light reflecting surface 114 of the first embodiment.

  The present embodiment is different in that the positional relationship between the lens unit 112 'and the operating member 114' is reversed with respect to the opening 105b opened in the transport track 102, but the detection optical axis of the light reflecting surface 114a 'is different. This is the same in that the amount of light detected by the light receiving element based on the reflected light from the background is increased or decreased by movement along Xd, and basically the same function and effect as in the first embodiment can be obtained.

  Next, a fourth embodiment according to the present invention will be described with reference to FIG. In this embodiment, the movement mode of the operating member is different from that in each of the above embodiments, but the detection method and the configuration of other parts are basically the same, so the same reference numerals are assigned to the same parts as in the first embodiment. These descriptions are omitted. In addition, although this embodiment demonstrates as what changed the structure of 1st Embodiment partially, it is also possible to change the structure of 2nd and 3rd Embodiment partially.

  As shown in FIG. 11, the operation member 214 of the present embodiment is configured such that the posture with respect to the detection optical axis Xd can be changed by a drive mechanism (not shown), and the light reflecting surface 214 a changes its direction by changing the posture of the operation member 214. It is like that. In the illustrated example, the intersection angle θ between the axis of the operating member 214 and the detection optical axis Xd can be changed around a point Ox on the detection optical axis Xd. For this reason, when the operation member 214 is in the second posture shown by the solid line in the drawing (θ = 0 in the drawing), the reflected light Lr2 formed by reflecting the illumination light Li on the light reflecting surface 214a is on the detection optical axis Xd. As a result, the posture of the operating member 214 is changed, and the operating member 214 is changed to the first posture indicated by a two-dot chain line in the drawing (θ is a predetermined value). When this happens, the reflected light Lr1 deviates from the detection optical axis Xd. Therefore, it can be seen that the amount of light detected by the light receiving element 117 due to the reflected light from the light reflecting surface 214a increases or decreases as the posture of the operating member 214 changes.

  As described above, in this embodiment, the amount of light detected by the light receiving element of the reflected light in the background can be increased or decreased by changing the posture of the operation member 214, so that the same effect as that of the above-described embodiment can be obtained. Can do.

  Next, a fifth embodiment according to the invention will be described with reference to FIG. In this embodiment, the movement mode of the operating member is different from that in each of the above embodiments, but the detection method and the configuration of other parts are basically the same, so the same reference numerals are assigned to the same parts as in the first embodiment. These descriptions are omitted. In addition, although this embodiment demonstrates as what changed the structure of 1st Embodiment partially, it is also possible to change the structure of 2nd and 3rd Embodiment partially.

  This embodiment is different from each of the above embodiments in that the operating member 314 including the light reflecting surface 314a is configured to be movable along a surface orthogonal to the detection optical axis Xd. In the case of this embodiment, when the operation member 314 is in the second position as shown by a solid line in FIG. 12, the light reflecting surface 314a is disposed on the detection optical axis Xd, and the reflected light Lr2 passes through the opening 105b. It is set to face the light receiving element 117. On the other hand, as shown by a two-dot chain line in the figure, when the operation member 314 is in the first position, the light reflecting surface 314a is set so as to deviate from the detection optical axis Xd. At the first position, the amount of light detected by the light receiving element 117 when the component P is not present is reduced by reducing or eliminating the reflected light from the light reflecting surface 314a. Therefore, in the present embodiment as well, the amount of light detected by the background can be increased or decreased by moving the operation member 314.

  As described above, in this embodiment, the position of the operating member 314 is changed, that is, the amount of the light reflecting surface 314a deviated from the detection optical axis Xd or the amount of light that passes through the opening 105b and travels toward the light receiving element 117 is changed. Thus, the amount of light detected by the light receiving element of the reflected light in the background can be increased or decreased, so that the same effect as that of the above-described embodiment can be obtained. Note that the moving direction of the operating member 314 may be a movement along a plane that intersects the detection optical axis Xd, and may not necessarily be a movement along a plane orthogonal to the detection optical axis Xd as described above. .

  In order to confirm the effects of the above-described embodiments, the illustrated light-reflective component detection system 110 is actually mounted on the component transport apparatus 100, and the component P is selected in each of light-on control and dark-on control. An inversion experiment was conducted. The configuration of the experimental apparatus is as shown in the first embodiment and the second embodiment. The measured value of the detected light quantity and the set threshold value are shown in Table 1 below. Here, the portion corresponding to the main control unit 120 has a function of adjusting the sensitivity of the detection signal of the light receiving element 117. For this reason, an optimum detection mode is set in each condition, and thus the measured value of the detected light amount Increases or decreases depending on the detection sensitivity of the detection mode. However, the display of the detection mode is omitted.

  In this embodiment, light-on control and dark-on control can be easily switched in any of the above-described examples (selection 1, selection 2, inversion 1, inversion 2), and a threshold value can be easily set in any control mode. And certainty of discrimination is also obtained. Here, in the light-on control, the position of the operating member (first position) is set so that the detected light amount of the background is low, and in the dark-on control, the position of the operating member (second position) is set so that the detected light amount of the background is high. Position) is set.

  In general, in light-on control, the background value should be low in order to ensure the ease of setting the threshold and the certainty of discrimination. In dark-on control, the background value should be high for the same reason. Since the optical conditions vary depending on the configuration of the track 102, the appearance of the component P, etc., the fact that the amount of light detected in the background can be adjusted as in the present invention simply selects either light-on control or dark-on control. This is extremely effective in that it is possible not only to switch between each other but also to cope with various optical conditions.

  The light reflection type component detection system of the present invention is not limited to the above-described illustrated examples, and it is needless to say that various modifications can be made without departing from the gist of the present invention. For example, the individual feature points of the above embodiments can be used in any combination as long as they do not contradict each other. In each of the above embodiments, the illumination light emitted from the light emitting element is irradiated and the reflected light is detected by the light receiving element. However, even if the system itself does not have the illumination light irradiation function. It is also possible to detect reflected light based on illumination light such as general-purpose illumination. Moreover, although only the example which uses the said system for a component selection part or a component inversion part is shown in the said embodiment, the detection part or discrimination | determination part which comprises the said system is in the conveyance path | route (on a conveyance track) in which components are conveyed. The content of processing performed based on detection and discrimination by the system is not limited to component selection and inversion, for example, processing for selecting a component sorting destination, and recording of the optical characteristics of the component Various processing modes that can be performed in the component processing unit, such as processing to be performed, can be used. Further, the present system is not limited to the above-described various types of processing (having a component processing unit), and may be used when only the detection and determination of the conveyance component is performed and no specific processing is performed.

DESCRIPTION OF SYMBOLS 100 ... Component conveyance apparatus (component supply apparatus) 101 ... Conveyance body, 102 ... Conveyance truck, 103 ... Component selection part, 103 '... Component inversion part, 110 ... Light reflection type component detection system, 112 ... Lens unit, 113 ... Driving member 114... Operating member 114 a Light reflecting surface 117 Light receiving element 118 Light emitting element 120 Main control unit 121 122 Control driving unit

Claims (7)

A light receiving element for detecting the amount of reflected light from a predetermined detection range set in a passing path through which the parts to be conveyed pass, and the amount of the reflected light detected by the light receiving element based on a predetermined determination condition In the light reflection type conveying parts detection system comprising the determining means for determining
When an operation member having a light reflection surface is arranged behind the detection range, and the component is not arranged in the detection range by operating the operation member to change the position or posture of the light reflection surface A light-reflective component detection system, characterized in that the amount of reflected light from the background is changed.   In the detection range, an optical opening is provided that opens in a wall surface disposed behind or in front of the passage region of the component, and at least at one position or posture within a range in which the position or posture of the light reflecting surface can be changed. The light reflection type component detection system according to claim 1, wherein the light reflected by the optical surface can be detected by the light receiving element through an optical opening.   The light reflection type component detection according to claim 1, wherein the operation member is configured such that a distance along the detection optical axis of the detection range and the light reflection surface can be changed. system.   A condensing lens that guides the reflected light to the light receiving element is disposed between the detection range and the light receiving element, and the operating member is placed on the detection optical axis of the light receiving element while maintaining the posture of the light reflecting surface. The light reflection type component detection system according to claim 3, wherein the light reflection type component detection system is movable along the same.   The light reflection type component detection system according to claim 1, wherein the operation member is configured so that an angle of the light reflection surface with respect to the detection optical axis can be changed.   The light reflection type component detection system according to claim 1, wherein the operation member is configured such that the light reflection surface is movable along a surface intersecting the detection optical axis.   The light reflection according to claim 1, further comprising: a transport body provided with the transport path; transport means for moving the parts on the transport path; and the detection range on the transport path. And a mold parts detection system.

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