JP2015225968A - Tape feeder and self-diagnosis method of sensor function therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect the presence/absence of a detection object by discovering an abnormality of a sensor function on early stage in a tape feeder including the sensor function in which the detection object such as a component held by a tape is detected by a photosensor.SOLUTION: The tape feeder has: a pitch feeding function which performs pitch feeding of the tape holding the component to supply the component to a pickup position of a component packaging device; an auto splicing function for automatically supplying a subsequent tape that is used next to a preceding tape being used at present, after the lapse of a predetermined interval without connecting with the preceding tape; and a sensor function in which the detection object of the tape is detected by the photosensor including a light-emitting part and a light-receiving part disposed to face the tape in a feeding path of the tape. During operation of the tape feeder, the quantity of light received by the light-receiving part of the photosensor is compared with a reference value, thereby performing self-diagnosis regarding the presence/absence of an abnormality in the sensor function.

Description

  The present invention relates to a tape feeder that feeds a component to a pickup position of a component mounting apparatus by pitch-feeding a tape that holds the component at a predetermined pitch, and in particular, a detection object such as a component held on the tape is detected by an optical sensor. The present invention relates to a technique for self-diagnosis of abnormality of a sensor function to be detected.

  In a component mounting apparatus, a method using a tape feeder is known as a method for supplying a component to a pickup position of a nozzle of a transfer head. In this method, a tape for holding a component at a predetermined pitch is pulled out from a supply reel, and the pitch is fed in synchronization with the mounting timing of the component to be supplied to a pickup position of a nozzle.

  In the parts supply method using such a tape feeder, when the tape in use is used up, it is necessary to supply a new tape to the tape feeder. In order to efficiently switch the tape, It is effective to detect the end portion of the part of the tape in use with a tape feeder. That is, the tape holds parts at a predetermined pitch along the longitudinal direction, but there is a so-called trail part that does not hold the parts behind the part end part. When reaching the pickup position, it is desirable from the viewpoint of improving productivity that the trail section thereafter is immediately discharged from the tape feeder.

  Conventionally, as a tape feeder provided with a component end detection unit for detecting a component end portion, there is one described in Patent Document 1. The component end detection part of this patent document 1 is equipped with the transmissive | pervious optical sensor. Specifically, it comprises a light emitting portion arranged on the upper surface side of the tape and a light receiving portion arranged opposite to the light emitting portion on the lower surface side of the tape, and the spot light from the light emitting portion is blocked by the components. When the amount of received light falls below a preset light amount, it is determined that there is a component. When the number of times that the component end detection unit does not detect a component during the tape transport operation (the number of times that the component is not determined to be present) reaches a predetermined number of times, it is determined that it is time to replace the tape.

  However, if there is an abnormality in the sensor function of the optical sensor, an error occurs in the detection of the component end portion. For example, when a foreign substance adheres to the light emitting part or the light receiving part of the optical sensor, the spot light from the light emitting part is always blocked, and even if there is no part, it is determined that there is a part. In this case, the component end tape arrives and the component-free tape is continuously used in spite of the replacement time of the tape. This causes the component to run out and stop the operation of the component mounting apparatus.

  In addition, a signal indicating that the light receiving unit has received a spot light from the light emitting unit even though it has not received the spot light may be generated due to an abnormality in the wiring or circuit of the light receiving unit or the like of the optical sensor. In this case, even if there is a part, it is determined that there is no part. In this case, it is mistakenly recognized that the component end portion has arrived even though the component end portion has not arrived, and the tape with the component is ejected from the tape feeder, and the component is wasted.

  As described above, if there is an abnormality in the sensor function of the optical sensor, the presence or absence of a detection target such as a component is erroneously determined. Therefore, it is desired to detect the abnormality in the sensor function at an early stage.

JP 2008-277509 A

  The problem to be solved by the present invention is that, in a tape feeder having a sensor function for detecting an object to be detected such as a component held on a tape by an optical sensor, an abnormality of the sensor function can be detected at an early stage. The object is to make it possible to accurately detect the presence or absence of an object.

  The present invention solves the above-mentioned problems by adding a function of self-diagnosis of abnormality of the sensor function by the optical sensor during operation of the tape feeder.

  That is, according to one aspect of the present invention, a pitch feed function for feeding a component to a pickup position of a component mounting apparatus by pitch-feeding a tape holding the component, and a subsequent to be used next to a preceding tape currently in use. An optical sensor having an auto splicing function for automatically supplying a tape at a predetermined interval without being connected to a preceding tape, and a light emitting unit and a light receiving unit arranged to face the tape in the tape transport path A tape feeder having a sensor function for detecting an object to be detected on the tape, and comparing the amount of light received by the light receiving portion of the optical sensor with a reference value during the operation of the tape feeder, A tape feeder is provided that includes a control unit that self-diagnoses the presence or absence of abnormality in the sensor function.

  According to another aspect of the present invention, a pitch feed function for feeding a component to a pickup position of a component mounting apparatus by pitch-feeding a tape holding the component, and a preceding tape currently in use are used. An auto splicing function that automatically supplies a succeeding tape at a predetermined interval without being connected to the preceding tape, and a light having a light emitting portion and a light receiving portion arranged so as to face the tape in the tape transport path In a tape feeder having a sensor function of detecting an object to be detected on a tape by a sensor, a method for self-diagnosis of abnormality of the sensor function, wherein the optical sensor is operated during the operation of the tape feeder. Provided is a self-diagnosis method for self-diagnosis of abnormality of the sensor function by comparing the amount of light received by the light-receiving unit with a reference value

  In the present invention, the self-diagnosis can be performed when there is no tape at a position facing the optical sensor. In this case, as the reference value, a reference value determined based on electro-optical characteristics unique to the photosensor can be used.

  On the other hand, in the present invention, the self-diagnosis can be performed when there is no tape at a position facing the optical sensor. In this case, as the reference value, a reference value determined based on the representative value of the received light amount for each pitch feed at the leading portion of the tape can be used.

  As described above, in the present invention, the self-diagnosis can be performed in any case by changing the reference value used for the self-diagnosis between the case where the tape does not exist at the position facing the optical sensor and the case where the tape exists. It is said. Of course, the self-diagnosis may be performed only when the tape does not exist at a position facing the optical sensor or only when the tape exists.

  In the present invention, whether or not the tape is present at a position facing the optical sensor is determined by providing a tape end detection sensor capable of detecting the leading and trailing ends of the tape on the upstream side of the optical sensor in the tape transport path. The determination can be made based on the detection information of the leading edge and the trailing edge of the tape by the tape edge detection sensor.

  ADVANTAGE OF THE INVENTION According to this invention, abnormality of a sensor function can be discovered at an early stage by carrying out self-diagnosis of the abnormality of the sensor function by an optical sensor during operation | movement of a tape feeder. Accordingly, it is possible to accurately detect the presence or absence of a detection target such as a component, and it is possible to suppress the occurrence of a situation in which the operation of the component mounting apparatus is stopped due to the above-described component breakage or the component is wasted.

It is a block diagram which shows one Example of the tape feeder of this invention. It is an expansion schematic diagram of the component detection sensor (optical sensor) part in the tape feeder of FIG. It is an expansion schematic diagram of the tape end detection sensor part in the tape feeder of FIG. It is explanatory drawing which shows the tape introduction (loading) operation | movement in the tape feeder of FIG. 1 in time series. It is explanatory drawing which shows the auto splicing operation | movement in the tape feeder of FIG. 1 in time series. It is explanatory drawing shown. It is a flowchart which shows the procedure of the self-diagnosis of the sensor function in the tape feeder of FIG. It is explanatory drawing which defines the status (operating state) of the tape feeder of FIG. It is a figure which shows the electrical optical characteristic of the component detection sensor used for the tape feeder of FIG. It is explanatory drawing which shows the teaching area and the judgment area of the tape in the algorithm 2 shown in FIG.

  Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is an overall configuration diagram showing an embodiment of a tape feeder of the present invention. The tape feeder of FIG. 1 is configured by providing each element described below in an elongated box-shaped tape feeder main body 1, and pitch-feeding the tape T holding the components to the components of the component mounting apparatus. Supply to pickup position P. Although not shown, parts are held on the tape T at a predetermined pitch (constant pitch) along the longitudinal direction.

  A tape transport path 2 leading to the pickup position P is provided at the upper part of the tape feeder main body 1. The upstream side of the tape transport path 2 is branched into two systems: a first tape introduction path 3 and a second tape introduction path 4. That is, the tape feeder of FIG. 1 has a first tape introduction path 3 and a second tape introduction path 4 as tape introduction paths for introducing the tape T into the tape transport path 2. Each of the second tape introduction paths 4 joins the tape transport path 2 at the downstream end. The tape T is first introduced from the tape introduction part 3 a of the first tape introduction path 3 and guided along the first tape introduction path 3 and the tape transport path 2. Thereafter, the tape T is transferred to the second tape introduction path 4 by a tape transfer means (not shown).

  A first sprocket 5 is arranged on the downstream end side of the tape transport path 2 as a first tape feeding means for feeding the tape T toward the pickup position P. The teeth of the first sprocket 5 are engaged with tape feed holes provided at a constant pitch on the tape T, and the pitch of the first sprocket 5 is rotated to feed the tape. A rotation shaft of a first motor 7 is connected to the first sprocket 5 via a plurality of intermediate gears 6, and the first sprocket 5 is rotated by the rotation drive of the first motor 7. The position adjacent to the downstream side of the first sprocket 5 is a pickup position P for parts.

  In the tape introduction path, the second sprocket 8 is arranged only as the second tape feeding means for feeding the tape toward the tape transport path 2 only on the first tape introduction path 3 side. The second sprocket 8 meshes with a tape feed hole provided in the tape at a constant pitch, and the second sprocket 8 rotates so that the tape travels along the first tape introduction path 3 toward the tape transport path 2. Sent. The second sprocket 8 is rotated by the rotation drive of the second motor 9 through the plurality of intermediate gears 6. In FIG. 1, the detailed configuration of the tape introduction path portion is omitted.

  In the tape feeder of FIG. 1, a third sprocket 10 is arranged in the tape transport path 2 as third tape feeding means for feeding the tape toward the first sprocket 5. The third sprocket 10 meshes with a tape feed hole provided on the tape at a constant pitch, and the tape is fed toward the first sprocket 5 along the tape transport path 3 by rotating the third sprocket 10. It is done. The third sprocket 10 is rotated by the rotation drive of the third motor 11 through the plurality of intermediate gears 6.

  The controller 12 controls the rotational drive of the first motor 7, the second motor 9, and the third motor 11. The types of the first motor 7, the second motor 9, and the third motor 11 are not particularly limited, but a servo motor with an encoder is used in this embodiment.

  A component detection sensor 13 for detecting a component held on the tape T is arranged on the upstream side of the third sprocket 10 in the tape conveyance path 2, and provided on the tape T on the downstream side of the component detection sensor 13. A hole detection sensor 14 for detecting the hole for tape feeding is arranged. Further, a tape end detection sensor 15 for detecting an end portion (front end and rear end) of the tape T is disposed on the upstream side of the component detection sensor 13, and further upstream of the tape end detection sensor 15 and the first end. A tape tip detection sensor 16 is disposed on the tape introduction path 3 side.

  The component detection sensor 13 is a transmissive optical sensor. As shown in FIG. 2, the light emitting unit 13 a disposed on the lower surface side of the tape T passing through the tape transport path 2 and the light emitting unit 13 a on the upper surface side of the tape T. And a light receiving portion 13b disposed to face each other. Therefore, when a component (not shown) held on the tape T comes to the optical axis position of the component detection sensor 13, the amount of light received by the light receiving portion 13b is reduced by blocking the spot light from the light emitting portion 13a by the component. The received light amount information from the light receiving unit 13b is transmitted to the control unit 12. The control unit 12 detects the presence or absence of a component held on the tape based on the received light amount information from the component detection sensor 13, and detects the arrival of the component end portion of the tape. The hole detection sensor 14 is a transmissive optical sensor of the same type as the component detection sensor 13, and detects the presence or absence of a tape feeding hole by the same principle as the component detection sensor 13.

  As shown in FIG. 3, the tape end detection sensor 15 is a mechanical sensor using a lever (a lever) 15a, and includes a lever 15a and an optical sensor element 15b. Located in. The other end of the lever 15a is located between the light emitting part and the light receiving part of the sensor element 15b. When the tip of the tape T arrives at the position of one end of the lever 15a, one end of the lever 15a is lifted by the tip of the tape T and rotates around the support shaft 15a-1. Thereby, the light from the light emitting portion of the sensor element 15b is received by the light receiving portion, the sensor element 15b is turned on, and the tip of the tape T is detected. While the tape T is passing, one end of the lever 15a remains lifted, and the sensor element 15b remains ON. Thereby, the presence of the tape T is detected. When the rear end of the tape T passes, one end of the lever 15a is lowered. Thereby, the sensor element 15b is turned from ON to OFF, and the rear end of the tape T is detected. The tape end detection information by these tape end detection sensors 15 is transmitted to the control unit 12. The tape tip detection sensor 16 is also a mechanical sensor of the same type as the tape end detection sensor 15 and detects the arrival of the tip of the tape T in the first tape introduction path 3 based on the same principle as the tape end detection sensor 15. . Tape tip detection information by the tape tip detection sensor 16 is also transmitted to the control unit 12.

  Next, the operation of the tape feeder of FIG. 1 will be described.

  FIG. 4 shows the operation when the tape (leading tape T1) is first introduced (loaded) into the tape feeder. FIG. 4A shows a state before the tape is introduced.

  First, as shown in FIG. 4B, the preceding tape T1 is introduced into the first tape introduction path 3 from the tape introduction portion 3a. Specifically, while driving the second motor 9 and rotating the second sprocket 8, the leading tape T1 is manually introduced from the tape introducing portion 3a into the first tape introducing path 3 to feed the leading tape T1. Are engaged with the second sprocket 8. When engaged with the second sprocket 8, the preceding tape T <b> 1 is automatically fed by the second sprocket 8, and conveyed downstream along the first tape introduction path 3 and the tape conveyance path 2. Then, as shown in FIG. 4C, when the leading end of the preceding tape T1 reaches the tape end detection sensor 15, the tape end detection sensor 15 is turned on. Thus, the control unit 12 detects that the leading end of the preceding tape T1 has reached the tape end detection sensor 15. After the leading end of the preceding tape T1 passes the tape end detecting sensor 15, the control unit 12 recognizes and monitors the leading end position of the preceding tape T1 based on the encoder value of the second motor 9.

  By continuing to drive the second motor 9, the preceding tape T1 is transported downstream along the tape transport path 2, passes through the component detection sensor 13 and the hole detection sensor 14, and the tip thereof reaches the third sprocket 10 ( FIG. 4 (d)). When the leading end of the preceding tape T1 reaches the third sprocket 10, the second motor 9 is stopped and the third motor 11 is driven instead. As a result, the third sprocket 10 rotates and the preceding tape T1 is conveyed toward the first sprocket 5. After the leading end of the preceding tape T1 reaches the third sprocket 10 and the third motor 11 is driven, the control unit 12 recognizes and monitors the leading end position of the preceding tape T1 based on the encoder value of the third motor 11. .

  Thereafter, the leading end of the preceding tape T1 reaches the first sprocket 5 by driving the third motor 11 (FIG. 4E). Thereby, the introduction of the preceding tape T1 is completed. That is, when the leading end of the preceding tape T1 reaches the first sprocket 5, the third motor 11 stops and the first motor 7 is driven instead. As a result, the first sprocket 5 is rotated by the pitch, the preceding tape T1 is pitch-fed, and the parts held on the preceding tape T1 are sequentially supplied to the pickup position P (FIG. 4 (f)).

  Next, an auto splicing function for automatically supplying (introducing) the succeeding tape T2 to be used next to the preceding tape T1 will be described with reference to FIG.

  As shown in FIG. 5A, the succeeding tape T2 is introduced into the first tape introducing path 3 from the tape introducing portion 3a while the preceding tape T1 is being used. Specifically, as in the case of introducing the preceding tape T1, the subsequent tape T2 is manually moved from the tape introducing portion 3a to the first tape while rotating the second sprocket 8 disposed in the first tape introduction path 3. It introduces into the introduction path 3 and engages the second sprocket 8 with the hole for feeding the tape of the subsequent tape T2. When meshed with the second sprocket 8, the subsequent tape T2 is automatically fed by the second sprocket 8. When the leading end of the subsequent tape T2 is detected by the tape leading end detection sensor 16, the control unit 12 stops the second motor 9. As a result, the leading end of the subsequent tape T2 stops at the position of the tape leading end detection sensor 16 as shown in FIG. 5A, and waits until the splicing operation is performed.

  Here, the preceding tape T1 is moved to the second tape introduction path 4 before the subsequent tape T2 is introduced from the tape introduction part 3a to the first tape introduction path 3. This is because the tape feeder of the present embodiment has two tape introduction paths of the first tape introduction path 3 and the second tape introduction path 4, but the present invention thus provides two tape introduction paths. The present invention is not limited to a tape feeder having a single tape feeder, and can be applied to a tape feeder having only one tape introduction path.

  In this embodiment, the splicing operation is started when the rear end of the preceding tape T1 passes through the third sprocket 10 as shown in FIG. The time when the rear end of the preceding tape T1 passes through the third sprocket 10 can be detected based on the encoder value of the first motor 7 from the time when the tape end detection sensor 15 detects the passage of the rear end of the preceding tape T1.

  When the rear end of the preceding tape T1 passes through the third sprocket 10, the control unit 12 drives the second motor 9 to rotate. As a result, the succeeding tape T2 is transported through the first tape introduction path 3 and reaches the tape transport path 2. Thereafter, as in the case of the preceding tape T1, the leading end of the succeeding tape T2 passes through the tape end detection sensor 15 (FIG. 5C) and reaches the first sprocket 5 via the third sprocket 10 (FIG. 5). 5 (d)). Thereby, the splicing work is completed. Thereafter, the first sprocket 5 is rotated by the pitch, the succeeding tape T2 is pitch-fed, and the parts held on the succeeding tape T2 are sequentially supplied to the pickup position P (FIG. 5 (e)). Thereafter, the procedure shown in FIGS. 5A to 5D is repeated to perform the next splicing operation.

  Thus, the tape feeder of FIG. 1 operates continuously by repeatedly performing the splicing operation. The tape feeder of FIG. 1 also performs self-diagnosis of the sensor function by the component detection sensor 13 during the operation. The self-diagnosis function will be described below.

  FIG. 6 is a flowchart showing a self-diagnosis procedure of the sensor function in the tape feeder of FIG. The control unit 12 executes this self-diagnosis procedure.

  In the self-diagnosis shown in FIG. 6, different algorithms are used depending on whether the tape is present at a position facing the component detection sensor 13 or not. Therefore, it is first determined whether or not there is a tape at a position facing the component detection sensor 13. Specifically, the status (operating state) of the tape feeder is classified into the statuses A to K shown in FIG. 7, and if the status is A, B, C, G, H, K, it faces the component detection sensor 13. It is determined that there is no tape at the position, and otherwise it is determined that there is a tape.

The correspondence between each status and FIG. 4 and FIG. 5 is generally as follows.
Status A: Fig. 4 (a)
・ Status B: Fig. 4 (b)
・ Status C: Fig. 4 (c)
Status D: Fig. 4 (d)
Status E: FIG. 4 (e), FIG. 4 (f), FIG. 5 (d), FIG. 5 (e)
・ Status F: Fig. 5 (a)
・ Status G: Fig. 5 (b)
・ Status H: Fig. 5 (c)

  The statuses I, J, and K are classified according to the position of the rear end of the preceding tape when the subsequent tape is not introduced.

  The status of the tape feeder is determined based on the tape end detection signals from the tape front end detection sensor 16 and the tape end detection sensor 15, and the encoder values of the second motor 9, the third motor 11 and the first motor 7. Judgment is possible.

  In order to determine whether or not a tape is present at a position facing the component detection sensor 13, it is not always necessary to classify the statuses A to K as described above. Whether or not a tape is present at a position facing the component detection sensor 13 can be determined based on a detection signal from the tape end detection sensor 15 at the tape end (the front end and the rear end of the tape). That is, since the distance from the tape end detection sensor 15 to the component detection sensor 13 is known, the tape end (the front end and the rear end of the tape) faces the tape end detection sensor 15 when the tape transport speed is known. Since the time to reach the position is known, it is possible to determine whether or not the tape exists at a position facing the component detection sensor 13. The tape transport speed is determined by the encoder value of the second motor 9 when the front end of the tape is transported from the tape end detection sensor 15 to the component detection sensor 13, and the rear end of the tape from the tape end detection sensor 15 to the component detection sensor 13. Can be obtained from the encoder value of the first motor 7 respectively.

  Returning to FIG. 6, if the status is A, B, C, G, H, K, it is determined that there is no tape at the position facing the component detection sensor 13 (no tape), and self-diagnosis by algorithm 1 is performed. carry out. On the other hand, if the status is not A, B, C, G, H, or K, it is determined that a tape exists at a position facing the component detection sensor 13 (with a tape), and the self-diagnosis by the algorithm 2 is performed.

  The algorithm 1 and the algorithm 2 are basically self-diagnosis of abnormality of the sensor function by comparing the amount of light received by the light receiving part of the component detection sensor 13 which is an optical sensor with a reference value. However, algorithm 1 and algorithm 2 use different reference values (how to determine the reference value).

  The reference value of algorithm 1 is determined based on the electrical and optical characteristics unique to the component detection sensor 13. FIG. 8 shows the electrical and optical characteristics of the component detection sensor 13. The horizontal axis of the figure is the duty ratio in PWM (pulse width modulation) of the light emitting part of the component detection sensor 13. The vertical axis represents the A / D conversion value of the amount of light received by the light receiving unit, that is, the sensor output. As indicated by a line A in FIG. 8, the electrical / optical characteristics unique to the component detection sensor 13 have a duty ratio of about 10.5% and a sensor output of 100%. On the other hand, when a foreign substance adheres to the light emitting part or the light receiving part, it apparently has an electro-optical characteristic such as a line B. On the other hand, if there is an abnormality in the wiring or circuit of the light receiving portion or the like, the electro-optical characteristics like the line C may be exhibited. When abnormal electro-optical characteristics such as lines B and C are exhibited, the presence / absence of a component that is a detection target is erroneously determined as described above. That is, there is an abnormality in the sensor function.

  Therefore, in the algorithm 1, the sensor function of the component detection sensor 13 is self-diagnosed using the sensor output when the duty ratio in the original electro-optical characteristic of the component detection sensor 13 is 10.5% as one reference value. Specifically, as shown in FIG. 6, when the duty ratio is sequentially increased to 10.5% and the sensor output at that time is less than 80% of the original electro-optical characteristics, It is determined that there is such an abnormality. On the other hand, if the sensor output reaches 100% before the duty ratio reaches 10.5%, it is determined that there is an abnormality such as the line C described above.

  The reference value is merely an example, and the reference value in the algorithm 1 is appropriately determined based on the electro-optical characteristics specific to the component detection sensor 13 to be used.

  Next, algorithm 2 will be described. Since the algorithm 2 is executed when a tape is present at a position facing the component detection sensor 13, the reference value is a representative value of the received light amount (sensor output) for each pitch feed at the leading portion of each tape. Determine based on.

  Specifically, as shown in FIG. 9, the leading portion of each tape (for 32 parts) is used as a teach section, and a representative sensor output when a part is present at a position facing the part detection sensor 13 in the teach section. Values (average value, standard deviation, etc.) are used as reference values (hereinafter referred to as “teach stage”). Then, the rear of the teach section is divided into a plurality of judge sections (one section is for 32 parts), and the sensor output of each of the judge sections is compared with the reference value to perform self-diagnosis of the sensor function of the part detection sensor 13. Implement (hereinafter referred to as “judgment stage”).

  This will be described with reference to FIG. 6. Algorithm 2 is performed when a tape is present at a position facing the component detection sensor 13. First, it is determined whether or not the teaching stage has been completed for the tape. If the teach stage has been completed, the judge stage is executed.

  In the judgment stage, the sensor outputs for 32 parts are sequentially stored in the data buffer, and when this is finished, they are compared with the reference values determined in the teach stage. In FIG. 6, when the average value of the sensor output at the judgment stage is outside the range of 0.8 to 1.2 times the reference value, it is determined that there is an abnormality in the sensor function.

  In FIG. 6, the self-diagnosis using the algorithm 1 or 2 is performed according to the presence or absence of the tape. However, the self-diagnosis using the algorithm 1 may be performed only when there is no tape. The self-diagnosis by the algorithm 2 may be performed only when the tape is present.

  In the present embodiment, the case where the component detection sensor 13 is a transmissive optical sensor has been described. However, the present invention can also be applied to a reflective optical sensor. In this case, the light emitting portion and the light receiving portion are arranged so as to face the parts on the upper surface side or the lower surface side of the tape. In the case of a reflective optical sensor, when the component held on the tape comes to the position of the optical axis of the sensor, the spot light from the light emitting unit is reflected by the component, increasing the amount of light received by the light receiving unit. In the same manner as the transmission type optical sensor, it is possible to detect the presence or absence of components, and it is possible to perform self-diagnosis. Furthermore, the present invention can be applied to optical sensors other than the component detection sensor 13. For example, the present invention can also be applied to the hole detection sensor 14. That is, as long as it is a detection target that causes a change in the amount of light received by the light receiving unit, the application range of the present invention is not limited to an optical sensor that detects a component.

DESCRIPTION OF SYMBOLS 1 Tape feeder main body 2 Tape conveyance path 3 1st tape introduction path 3a Tape introduction part 4 2nd tape introduction path 4a Tape introduction part 5 1st sprocket 6 Intermediate gear 7 1st motor 8 2nd sprocket 9 2nd motor 10 3rd Sprocket 11 Third motor 12 Control unit 13 Component detection sensor (optical sensor)
13a Light emitting part 13b Light receiving part 14 Hole detection sensor (light sensor)
15 Tape edge detection sensor 16 Tape edge detection sensor

Claims (11)

A pitch feed function that feeds the component to the pickup position of the component mounting device by pitch-feeding the tape holding the component;
An auto splicing function that automatically supplies a succeeding tape to be used next to a preceding tape currently in use without being connected to the preceding tape at a predetermined interval;
A sensor function for detecting an object to be detected on the tape by an optical sensor including a light emitting unit and a light receiving unit arranged so as to face the tape in the transport path of the tape;
A tape feeder having:
A tape feeder provided with a control unit for self-diagnosis of abnormality of the sensor function by comparing the amount of light received by the light receiving unit of the optical sensor with a reference value during the operation of the tape feeder.   The tape feeder according to claim 1, wherein the control unit performs the self-diagnosis when a tape is not present at a position facing the optical sensor.   The tape feeder according to claim 2, wherein the reference value is determined based on electro-optical characteristics unique to the optical sensor.   The tape feeder according to claim 1, wherein the control unit performs the self-diagnosis when a tape is present at a position facing the optical sensor.   The tape feeder according to claim 4, wherein the reference value is determined based on a representative value of the amount of received light for each pitch feed at a leading portion of the tape.   A tape end detection sensor capable of detecting the leading end and the trailing end of the tape is provided upstream of the optical sensor in the tape transport path, and the control unit detects the leading and trailing ends of the tape by the tape end detection sensor. 6. The tape feeder according to claim 2, wherein it is determined whether or not a tape is present at a position facing the optical sensor. A pitch feed function that feeds the component to the pickup position of the component mounting device by pitch-feeding the tape holding the component;
An auto splicing function that automatically supplies a succeeding tape to be used next to a preceding tape currently in use without being connected to the preceding tape at a predetermined interval;
A sensor function for detecting an object to be detected on the tape by an optical sensor including a light emitting unit and a light receiving unit arranged so as to face the tape in the transport path of the tape;
A tape feeder having a self-diagnosis of the presence or absence of abnormality of the sensor function,
A self-diagnosis method for self-diagnosis of abnormality of the sensor function by comparing the amount of light received by the light receiving unit of the optical sensor with a reference value during the operation of the tape feeder.   The self-diagnosis method according to claim 7, wherein the self-diagnosis is performed when a tape does not exist at a position facing the optical sensor.   The self-diagnosis method according to claim 8, wherein a reference value determined based on electro-optical characteristics unique to the optical sensor is used as the reference value.   The self-diagnosis method according to claim 7, wherein the self-diagnosis is performed when a tape is present at a position facing the optical sensor.   The self-diagnosis method according to claim 10, wherein a reference value determined based on a representative value of the amount of received light for each pitch feed at the leading portion of the tape is used as the reference value.