JP7394279B2 - parts supply device - Google Patents

Description

The present invention relates to a component supply device that supplies components to a supply position in a component mounting apparatus.

2. Description of the Related Art As a component supply device that supplies components to a component mounting apparatus, a tape feeder that supplies components stored in pockets of a carrier tape to a component mounting mechanism is widely used. The carrier tape is set on a reel in a state where it is wound and stored at a predetermined length, and the parts are taken out from the carrier tape that is conveyed to a parts takeout position by a tape feeder. When all the carrier tapes stored in one reel are pulled out and parts are exhausted, a new reel is set and the next carrier tape is additionally supplied. During this reel exchange, ``empty tape discharge'' is performed to send out the preceding carrier tape from which the last component has been taken out, and ``heading'' is performed to send the leading edge of the carrier tape to be supplied subsequently to the component take-out position. In addition to processing associated with such reel exchange, it is necessary to detect the presence or absence of the carrier tape at a predetermined position when controlling the tape feed of the carrier tape within the tape feeder. For this reason, tape feeders equipped with a tape detection sensor for detecting the presence or absence of a carrier tape have been known (for example, see Patent Document 1). In the prior art disclosed in Patent Document 1, a carrier tape is mechanically detected using a rotatable sensor dog via a movable fulcrum. That is, when the carrier tape comes into contact with a contact portion provided on the sensor dog, the sensor dog rotates, thereby detecting that the carrier tape has reached a predetermined position.

JP 2015-103773 Publication

However, in the mechanical tape detection method in which a dog member is brought into contact with a carrier tape, as in the prior art shown in the above-mentioned patent document, when the detection target is an embossed tape with a plurality of embossed portions, , there is a possibility that the dog member interferes with the embossed part, causing a conveyance problem. In order to avoid such problems with the mechanical tape detection method, it may be possible to adopt an optical tape detection method that detects the object in a non-contact manner instead of the mechanical detection. However, when the detection target is an embossed tape, the embossed portion is often made of a translucent material such as resin, so there is a risk that reliable detection may not be possible using the optical tape detection method. As described above, in the conventional technology, when an embossed tape with a plurality of protruding embossed portions is to be detected, there is a problem in that it is difficult to reliably detect the presence or absence of the tape.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a component supply device that can reliably detect the presence or absence of a tape even when the detection target is an embossed tape on which a plurality of embossed portions are provided.

A component supply device of the present invention is a component supply device capable of conveying a carrier tape in which a plurality of embossed portions in which components are stored are formed intermittently at a predetermined pitch, and includes a conveyance path through which the carrier tape is conveyed. a dog member that is rotatably provided via a movable fulcrum and includes a contact portion that comes into contact with the carrier tape; a detection portion that detects the carrier tape by detecting rotation of the dog member; The conveyance path has a groove portion that accommodates the embossed portion, and a support portion that abuts and supports an end portion of the carrier tape that extends outward from the embossed portion, is arranged such that the abutting part does not interfere with the embossed part, and has a regulating part that regulates a rotation range of the dog member, and the detecting part is a light projecting part that projects detection light. The optical sensor has a light receiving part that receives the detection light projected thereon, and the dog member has a light blocking part that is located between the light projecting part and the light receiving part and blocks the detection light. , the abutment portion and the light shielding portion are positioned across the movable fulcrum of the dog member .

According to the present invention, even when the detection target is an embossed tape on which a plurality of embossed portions are provided, the presence or absence of the tape can be reliably detected.

Configuration explanatory diagram showing the overall configuration of a parts supply device according to an embodiment of the present invention A partial sectional view of a parts supply device according to an embodiment of the present invention A plan view of an opening/closing cover of a parts supply device according to an embodiment of the present invention A plan view of an opening/closing cover of a parts supply device according to an embodiment of the present invention A vertical cross-sectional view of an opening/closing cover of a component supply device according to an embodiment of the present invention A perspective view of an opening/closing cover of a component supply device according to an embodiment of the present invention A partial sectional view of a parts supply device according to an embodiment of the present invention An explanatory diagram of a transmission mechanism that transmits driving torque to a tape transport section in a component supply device according to an embodiment of the present invention A partial sectional view of a parts supply device according to an embodiment of the present invention Functional explanatory diagram of a parts supply device according to an embodiment of the present invention Functional explanatory diagram of a parts supply device according to an embodiment of the present invention Configuration explanatory diagram of a tape detection section in a component supply device according to an embodiment of the present invention Functional explanatory diagram of a tape detection unit in a component supply device according to an embodiment of the present invention A sectional view of a conveyance path that guides a carrier tape in a component supply device according to an embodiment of the present invention An explanatory diagram of a carrier tape to be supplied by a component supply device according to an embodiment of the present invention

Next, embodiments of the present invention will be described with reference to the drawings. First, with reference to FIG. 1, the overall configuration of a tape feeder 1, which is a component supply device in this embodiment, will be described. The tape feeder 1 has a function of feeding components stored in a carrier tape 20 for supplying components to a component mounting device (not shown). The tape feeder 1 shown in this embodiment has a configuration capable of conveying an embossed type carrier tape 20 in which a plurality of embossed portions 20e (see FIG. 15) in which parts are stored are formed intermittently at a predetermined pitch. ing.

The structure of the embossed type carrier tape 20 will be described with reference to FIG. 15. As shown in FIG. 15(a), the base tape 20a, which is the main body of the carrier tape 20, has a plurality of pockets 20c storing parts P to be mounted and feed holes 20d for transportation formed at regular intervals. There is. A cover tape 20b for sealing the pocket 20c is attached to the upper surface of the base tape 20a. The carrier tape 20 is transported by rotating a sprocket provided with an engagement pin that engages with the feed hole 20d, thereby supplying the component P stored in the pocket 20c to the component mounting apparatus.

As shown in FIG. 15(b), convex embossed portions 20e forming the outer surface of the pocket 20c are formed intermittently at a predetermined pitch on the lower surface of the base tape 20a. When the tape feeder 1 supplies the component P, the cover tape 20b is peeled off from the base tape 20a to open the pocket 20c, and the component P is supplied from the opened pocket 20c at the supply position 4c set near the downstream end of the tape feeder 1. The component P is taken out and supplied to the component mounting device.

FIG. 15(c) shows a cross section of the carrier tape 20 at the position of the embossed portion 20e. In the carrier tape 20, the widthwise end portion 20f of the base tape 20a extends outward from the embossed portion 20e. The conveyance path 4 through which the carrier tape 20 is conveyed within the tape feeder 1 has a support portion 4e (see FIG. 14) that abuts and supports the lower surface of the left and right ends 20f of the base tape 20a. .

The tape feeder 1 is constructed by arranging the elements described below on a main body part 2 made of a plate-shaped frame. These elements are covered by side covers (not shown) provided on both sides. As shown in FIG. 1, the main body 2 is provided with a conveyance path 4 that guides the carrier tape 20 from an insertion port 4a opened at the bottom of the upstream side to an ejection port 4b set near the end of the upper surface of the downstream side. It is being

The carrier tape 20 introduced into the conveyance path 4 from the insertion opening 4a (arrow a) is conveyed to the upper surface of the main body 2 via the oblique section provided in the middle, and is then transported to the supply position of the component P to the component mounting apparatus M. Reach 4c. At the supply position 4c, the nozzle of the component mounting device M (not shown) moves up and down (arrow b) to perform a component extraction operation, thereby taking out the component P from the pocket 20c. The taken out component P is transferred to the component mounting device by the mounting head (arrow c) and mounted on the substrate to be worked on. Conveyance of the carrier tape 20 in the above-mentioned component supply is performed by the tape conveyance section 3 described below.

The tape transport section 3 includes a first motor 5, a tape feed sprocket 6, a positioning sprocket 7, and a discharge sprocket 8. By driving the tape feed sprocket 6, positioning sprocket 7, and discharge sprocket 8 by the first motor 5, which is a drive source, the carrier tape 20 inserted from the insertion port 4a is conveyed within the tape feeder 1, and is transported to the supply position 4c. is positioned. The tape transport section 3 is covered by an openable/closable cover 9, and the carrier tape 20 is engaged with the positioning sprocket 7 and the ejection sprocket 8 by means of the openable cover 9. It is done by pressing. Note that if the ejection sprocket 8 is provided lower than in FIG. It is also possible to engage carrier tape 20.

During the tape conveyance process in which the carrier tape 20 is conveyed along the conveyance path 4 by the tape conveyance section 3, the cover tape 20b peeled off from the base tape 20a is folded back to the upstream side and stored in the cover tape storage provided in the main body section 2. It is collected into the section 2f. After the component P is taken out at the supply position 4c, the base tape 20a is discharged to the downstream side of the tape feeder 1 by the discharge sprocket 8 via the front cover 2h arranged on the end surface of the main body part 2.

That is, in the configuration of the tape transport section 3 described above, the positioning sprocket 7 engages with the feed hole 20d of the carrier tape 20 and rotates to transport the carrier tape 20 and position the pocket 20c to the supply position 4c. This is the sprocket. Further, the tape feeding sprocket 6 is a second sprocket that passes the carrier tape fed from the upstream side to the above-mentioned first sprocket. The positioning sprocket 7, which is a first sprocket, and the tape feeding sprocket 6, which is a second sprocket, engage and rotate in a feeding hole 20d provided in the carrier tape 20, thereby conveying the carrier tape 20 and parts. A transport sprocket is configured to supply the component P to the supply position 4c to the mounting device M.

The discharge sprocket 8 is disposed downstream of the supply position 4c, and has the function of conveying the carrier tape 20 from the supply position 4c to the discharge port 4b by engaging with the feed hole 20d of the carrier tape 20 and rotating. ing. Thus, in this embodiment, the supply position 4c is arranged between the positioning sprocket 7 and the discharge sprocket 8.

The positioning sprocket 7 and the first motor 5 constitute a first carrier tape transport section 15 that is arranged at the downstream portion of the transport path 4 and transports the carrier tape 20 to the supply position 4c. Furthermore, the present embodiment includes a second carrier tape transport section 16 that transports the carrier tape 20 introduced from the insertion port 4a from upstream of the transport path 4 to the first carrier tape transport section 15. That is, in the vicinity of the downstream side of the insertion port 4a in the conveyance path 4, a second carrier tape conveyance section 16 configured to rotationally drive the tape loading sprocket 10 by the second motor 11 is arranged. The second carrier tape transport section 16 is used to automatically insert the carrier tape 20 to the downstream side of the transport path 4. Note that when inserting the carrier tape 20 manually, the second carrier tape conveying section 16 may be omitted.

A tape detection section 13 (see FIGS. 12 and 13) is located in the oblique section of the transport path 4 between the first carrier tape transport section 15 and the second carrier tape transport section 16 (see the ascending section B shown in FIG. 7). ) is provided. The tape detection unit 13 is a carrier tape detection means, and here, the presence or absence of the carrier tape 20 at a predetermined position of the carrier tape 20 is detected by detecting the displacement of the dog member 14 that comes into contact with a predetermined position of the carrier tape 20 using an optical sensor 13a. do.

The lower surface of the main body 2 is provided with a convex portion 2a for connection to the component mounting apparatus M and a mounting rail 2b. By attaching the mounting rail 2b to a feeder base provided in the component supply section of the component mounting apparatus M, the tape feeder 1 is set at a predetermined position in the component supply section. The convex portion 2a is provided with a connector 2c, an air joint 2d, and a hook 2e. When the tape feeder 1 is set on the feeder base, the connector 2c and the air joint 2d are fitted with the other side (component mounting device side). The connection status is established. At this time, the tape feeder 1 is fixed in position to the feeder base by the hook 2e. In this connected state, it is possible to supply power and air from the component mounting device to the tape feeder 1, and also to exchange signals between the component mounting device and the tape feeder 1.

A feeder control section 12 that controls the operation of the tape feeder 1 is built into the convex portion 2a. When the tape feeder 1 is connected to the component mounting apparatus M, the feeder control section 12 is electrically connected to the device control section of the component mounting apparatus M via the connector 2c. As a result, an operation command from the device control unit of the component mounting apparatus M is transmitted to the tape feeder 1, and an operation feedback signal of the component feeding operation by the tape feeder 1 is transmitted to the component mounting apparatus M.

An operation panel 2g is provided on the upper surface of the main body 2, located on the upstream side. The operation panel 2g is provided with terminal devices (not shown) such as buttons, a display section, and a lamp connected to the feeder control section 12. By operating these terminal devices, predetermined operational inputs are performed on the tape feeder 1, and displays for notifications such as the operational status of the tape feeder 1 and abnormality warnings are performed.

Next, the detailed configuration of the tape transport section 3 and the opening/closing cover 9 will be explained with reference to FIGS. 2 to 6. As shown in FIG. 2, an open/close cover 9 (cover member) is attached to the upper end surface of the main body 2 so as to cover the downstream side of the conveyance path 4 and to be openable and closable. As shown in FIG. 6, the opening/closing cover 9 is an elongated member having a substantially gate-shaped cross section (see FIG. 5) with an open bottom side.

The opening/closing cover 9 is provided with a pair of side surfaces 9g extending downward from both ends of the top surface constituting a gate shape. A locking pin 9i is provided at the upstream end of the opening/closing cover 9 to connect a pair of side surfaces 9g. Furthermore, a pair of hanging portions 9j are provided at the downstream end of the openable/closing cover 9, extending downward from the side surface portion 9g, and the hanging portions 9j are connected by a fixing pin 9h.

In FIG. 2, an opening/closing cover holding part 17 for holding the opening/closing cover 9 is provided at the downstream end of the main body part 2. As shown in FIG. An opening/closing cover locking part 18 that locks the upstream end of the opening/closing cover 9 is provided on the upstream side of the opening/closing cover holding part 17 in the main body part 2 . When the opening/closing cover 9 is attached to the main body 2, the fixing pin 9h at the downstream end of the opening/closing cover 9 is pivotally supported in a vertically long hole provided in the opening/closing cover holding part 17, and 17 is biased downward by a biasing spring 17a.

When the openable cover 9 is closed with respect to the main body 2, the locking pin 9i provided at the upstream end of the openable cover 9 is locked by the openable cover locking portion 18. The opening/closing cover locking portion 18 includes a locking block 18a which is provided with a locking member 18c capable of locking the locking pin 9i and is pivotally supported by a pivot pin 18b. A biasing spring 18d that biases the locking member 18c in a downward direction is connected to the locking block 18a, and when the opening/closing cover 9 is closed, the locking pin 9i is pushed down by the locking member 18c and is locked. will be stopped.

FIG. 3 shows the top surface of the open/close cover 9 attached to the main body 2 in this manner. Further, FIG. 4 shows the arrangement of openings on the top surface of the openable/closable cover 9. As shown in FIG. As shown in FIG. 4, a planar first cover portion 9a and a second planar cover portion 9b are provided on the upper surface of the opening/closing cover 9. As shown in FIG. The first cover part 9a and the second cover part 9b cover the upper part of the conveyance path 4 when the open/close cover 9 is attached to the main body part 2. That is, the opening/closing cover 9, which is a cover member, covers the carrier tape 20 engaged with the positioning sprocket 7, which is the first sprocket, from above.

Furthermore, a first opening 9c, a second opening 9d, a first relief portion 9e, and a second relief portion 9f are provided on the upper surface of the openable/closable cover 9. The first opening 9c is an opening for taking out parts, and the downstream end region of the first opening 9c matches the supply position 4c in the conveyance path 4. A downstream portion of the tape guide 23, which will be described below, fits into the first opening 9c on the upstream side of the supply position 4c. As will be described later, the downstream end of the tape guide 23 is used for peeling the cover tape 20b from the carrier tape 20 by folding back the cover tape 20b at the end when manually setting the carrier tape 20. It functions as part 23a.

The second opening 9d is provided at a position corresponding to the driven roller 22, which will be described below, so that the driven roller 22 can be accessed from above when the open/close cover 9 is closed. The first relief part 9e and the second relief part 9f are the engagement pin 7a of the positioning sprocket 7 and the engagement pin of the discharge sprocket 8, respectively, when the opening/closing cover 9 is lowered relative to the main body 2 and closed. 8a is provided to escape.

FIG. 5 shows cross sections from AA to EE in the openable cover 9 shown in FIG. That is, in each cross section shown in FIG. 5, the top surface and side surface portions 9g and the locking pins 9i, which constitute the gate-shaped cross section of the opening/closing cover 9, appear. In the AA cross section shown in FIG. 5(a), the first cover portion 9a on the upper surface, the first relief portion 9e, and the driven roller 22 are visible. In the BB cross section shown in FIG. 5(b), the first opening 9c provided on the top surface and the driven roller 22 are visible. In the CC cross section shown in FIG. 5(c), the first opening 9c provided on the upper surface, the second relief portion 9f, and the driven roller 22 are visible. In the DD cross section shown in FIG. 5(d), the second opening 9d provided on the upper surface and the driven roller 22 are visible. In the EE cross section shown in FIG. 5(e), the second cover portion 9b and the locking pin 9i on the upper surface are visible.

A plate-shaped tape guide 23 is provided in the tape conveyance section 3 along the upper surface of the conveyance path 4 so as to cover above the tape feed sprocket 6 and the positioning sprocket 7 . The tape guide 23 has a function of guiding the upper surface of the carrier tape 20 being conveyed along the conveyance path 4 . The tape guide 23 is provided with an opening 23b that communicates the transport path 4 upward. A pair of rollers configured by engaging a driving roller 21 and a driven roller 22 for peeling and discharging the cover tape 20b are arranged above the opening 23b.

An air ejection hole (not shown) having a function of ejecting air at a predetermined timing is opened at a position facing the opening 23b on the bottom surface of the conveyance path 4. The cover tape 20b can be introduced between the drive roller 21 and the driven roller 22 by blowing up the tip of the cover tape 20b stuck to the carrier tape 20 with the air ejected from the air jet hole. In this state, by rotating the drive roller 21 and the driven roller 22, the cover tape 20b is peeled off from the carrier tape 20, and the peeled cover tape 20b is drawn in and stored in the cover tape through the cover tape discharge path 24. It can be discharged to section 2f.

Therefore, the drive roller 21 and the driven roller 22 have a function as a peeling section that peels off the cover tape 20b from the carrier tape 20 upstream of the supply position 4c, and also pull in the peeled cover tape 20b by this peeling section to cover the cover tape 20b. It has a function of discharging the tape to the tape storage section 2f. That is, in this case, the peeling section including the drive roller 21 and the driven roller 22 has an automatic peeling function that automatically peels off the cover tape 20b. This automatic peeling function is used in an autoload mode in which the carrier tape 20 is automatically loaded and in a case in which the carrier tape 20 is manually loaded. Here, the autoload mode means that when the current carrier tape 20 that is currently supplying components has finished supplying the components, the second carrier tape transport section 16 is used to transfer the waiting subsequent carrier tape 20 to the transport path 4. This is a function that automatically inserts data up to the downstream.

Among these pair of rollers, one driving roller 21 (roller) is fixedly arranged on the main body portion 2 . Torque generated by the first motor 5, which is a drive source, is transmitted to the drive roller 21 via a transmission mechanism (see FIG. 8). Further, of the pair of rollers, the other driven roller 22 is pivotally supported by the side surface 9g of the opening/closing cover 9, and rotates by meshing with the drive roller 21. That is, in this embodiment, the opening/closing cover 9 is configured to have a driven roller 22 that rotates following the rotation of the drive roller 21 and peels off the cover tape 20b together with the drive roller 21. Thereby, the driven roller 22 can be attached and detached together with the opening/closing cover 9, and the cover tape 20b can be easily set when the carrier tape 20 is attached to the tape feeder 1.

The transport sprocket and discharge sprocket 8, which are composed of a positioning sprocket 7 as a first sprocket and a tape feed sprocket 6 as a second sprocket, and a pair of rollers, a driving roller 21 and a driven roller 22, are connected to the opening/closing cover 9. placed below. With such a configuration, it is possible to arrange the driving roller 21 and the driven roller 22 at a position close to the supply position 4c.

FIG. 7 shows a state in which the opening/closing cover 9 is opened to expose the tape transport section 3 and the transport path 4. That is, first, the locking block 18a is rotated around the pivot pin 18b in the opening/closing cover locking portion 18 (arrow d) to release the locking of the locking pin 9i by the locking member 18c. Thereby, it is possible to open the open/close cover 9, which is pivotally supported by the downstream fixing pin 9h by the open/close cover holding portion 17 (arrow e). At this time, the driven roller 22 is disengaged from the drive roller 21 and moves together with the opening/closing cover 9. In this state, the transport path 4 and the tape guide 23 covering the transport path 4 are exposed.

As shown here, in the conveyance path 4, the downstream range from the apex of the positioning sprocket 7 is a flat section A in which the conveyance path 4 is flat, and the upstream range of the flat section A is an upward slope from the bottom of the main body 2 to the top surface. This is section B. The supply position 4c from which the part P is taken out is arranged in the flat section A. A pair of rollers, a driving roller 21 and a driven roller 22, are arranged in a space between the upstream climbing section B and the opening/closing cover 9.

Above the conveyance path 4 upstream from the ascending section B to the supply position 4c, a tape guide 23 that covers the conveyance path 4 is provided separately from the opening/closing cover 9 and fixed to the main body portion 2. The opening 23b provided in the tape guide 23 is located at the engagement portion between the drive roller 21 and the driven roller 22. Thereby, the cover tape 20b peeled off from the carrier tape 20 conveyed through the conveyance path 4 can be sandwiched between the driving roller 21 and the driven roller 22 and then discharged.

When loading the carrier tape 20 without using the automatic peeling function of the tape feeder 1, the cover tape 20b is wrapped around the downstream edge of the tape guide 23 and folded back, so that the cover tape 20b is attached to the carrier tape 20. Peel it off. That is, in this case, the downstream edge of the tape guide 23 functions as a peeling part that peels the cover tape 20b from the carrier tape 20 upstream of the supply position 4c (see FIG. 10). Note that the automatic peeling function refers to a peeling function of the cover tape 20b that automatically sets the carrier tape 20 to the component supply device.

Here, with reference to FIGS. 8 and 9, the configuration of the transmission mechanism in the first carrier tape transport section 15 will be described. This transmission mechanism has a function of transmitting torque generated by the first motor 5, which is a single motor, to each element described below. In FIG. 8, a first transmission gear 51 is engaged with a drive gear 50 coupled to the rotating shaft of the first motor 5, and a second transmission gear 52 provided coaxially with the first transmission gear 51 is engaged with a second transmission gear 52. Three transmission gears 35 are meshed. The third transmission gear 35 includes a positioning sprocket gear 31 that is coaxial with the positioning sprocket 7 that positions the carrier tape 20, and a second sprocket gear 34 that is coaxial with the tape feeding sprocket 6 that transports the carrier tape 20 to the positioning sprocket 7. 4th gear) is engaged.

A fourth transmission gear 33 is meshed with the positioning sprocket gear 31 for transmitting torque to a discharge sprocket gear 32 coaxial with the discharge sprocket 8 that discharges the carrier tape 20 . Further, a fifth transmission gear 37 is meshed with the second sprocket gear 34. Further, the fifth transmission gear 37 meshes with a sixth transmission gear 38 that transmits torque to a peeling roller gear 36 coaxial with the drive roller 21 . Therefore, the torque of the positioning sprocket gear 31 is applied by the fifth transmission gear 37, the sixth transmission gear 38, and the peeling roller gear 36 to the driving roller 21, which is a pair of rollers that feed the cover tape 20b peeled from the carrier tape 20. and is transmitted to the driven roller 22.

FIG. 9 shows the torque transmission path from the fifth transmission gear 37 to the driven roller 22 in cross section. As shown in FIG. 9, the sixth transmission gear 38 that meshes with the fifth transmission gear 37 and the peeling roller gear 36 that meshes with the sixth transmission gear 38 are both fixed to the main body 2 constituting the frame of the tape feeder 1. It is rotatably supported by a shaft 38a and a fixed shaft 36b, respectively. Here, the peeling roller gear 36 is provided with a rotating sleeve 36a extending horizontally from one side surface. A fixed shaft 36b is fitted into the rotating sleeve 36a in such a manner that relative rotation is allowed. Furthermore, the drive roller 21 is attached to the rotating sleeve 36a so as to be slidable and rotatable in the axial direction with respect to the peeling roller gear 36.

The opening/closing cover 9 covering the upper surface of the main body part 2 is provided with a shaft 22b attached to the opening/closing cover 9. The shaft 22b is fitted to the rotating shaft 22a so as to be relatively rotatable, and the driven roller 22 is fixed to the rotating shaft 22a. When the open/close cover 9 is closed with respect to the main body 2, the driven roller 22 meshes with the driving roller 21, and the driven roller 22 rotates as a result of the driving roller 21. The shaft 22b can be moved within a predetermined range using an elastic body such as a spring. This is to enable the driven roller 22 to maintain contact with the driving roller 21 even when the openable/closeable cover 9 moves up and down depending on the thickness of the carrier tape 20.

A circular recess 21a is provided on one side of the drive roller 21 (the side facing the peeling roller gear 36), and a compression spring is provided between the bottom of the recess 21a and the side of the peeling roller gear 36. A coil spring 39a is attached. The coil spring 39a urges the drive roller 21 outward along the rotating sleeve 36a. As a result, the driving roller 21 is pressed by the biasing force of the coil spring 39a against the stopper 39 fixedly attached to the rotating sleeve 36a. Torque is transmitted from the fifth transmission gear 37 to the drive roller 21 through the frictional force between the drive roller 21 and the stopper 39, and relative sliding of the drive roller 21 with the stopper 39 and the rotating sleeve 36a is allowed. .

This makes it possible to limit the upper limit of the torque transmitted to the drive roller 21 within the range of the frictional force due to the biasing force of the coil spring 39a. Therefore, it is possible to prevent problems caused by excessive torque being transmitted to the drive roller 21, such as breakage of the base tape 20a sandwiched between the drive roller 21 and the driven roller 22 due to excessive tension. The function of limiting the upper limit of the transmitted torque can also be achieved by another mechanism, such as wrapping a slippable coil around the rotating sleeve 36a.

In the above configuration, by driving the first motor 5 to generate torque, torque is transmitted to the positioning sprocket gear 31, the ejection sprocket gear 32, the second sprocket gear 34, and the peeling roller gear 36 via a plurality of gears. be done. As a result, torque is transmitted to the drive roller 21 provided coaxially with the positioning sprocket gear 31, the ejection sprocket gear 32, the second sprocket gear 34, and the peeling roller gear 36, the positioning sprocket 7, the ejection sprocket 8, and the tape feeding sprocket 6. Ru.

That is, the torque that drives the transport sprocket and ejection sprocket 8, which are made up of the positioning sprocket 7 that is the first sprocket and the tape feed sprocket 6 that is the second sprocket, and the driving roller 21 of the pair of rollers is common. is generated by a single first motor 5 which is the driving source of the motor. By using a common drive source in this way, the drive roller 21 and driven roller 22 for discharging the cover tape 20b can be placed close to the supply position 4c.

As shown in the above configuration, the transmission mechanism shown in FIG. 8 is configured to include a plurality of gears. These multiple gears include a second sprocket gear 34 provided coaxially with the tape feed sprocket 6, which is a second sprocket, and the drive roller 21 receives torque transmitted via the second sprocket gear 34. It is designed to rotate. That is, the driving roller 21 has a peeling roller gear 36 coaxial with the driving roller 21, and the driving roller 21 is rotated by torque transmitted via the peeling roller gear 36.

In this way, in the tape feeder 1, the transport sprocket that constitutes the tape transport mechanism and the roller that constitutes the cover tape collection mechanism are driven by a single motor, thereby making it possible to reduce the equipment cost of the tape feeder 1. At the same time, the equipment can be made more compact.

FIG. 10 shows a state in which the carrier tape 20 is set using the automatic peeling function of the cover tape 20b. That is, the tip of the cover tape 20b is introduced between the driving roller 21 and the driven roller 22 through the opening 23b by air jetting, and by rotating these rollers in this state, the cover tape 20b is sandwiched and the carrier tape is formed. Peel off from 20. The peeled cover tape 20b is then discharged to the cover tape storage section 2f (see FIG. 1) via the cover tape discharge path 24.

Next, FIG. 11 shows a state in which the carrier tape 20 is set by manual operation. Unlike the case where an automatic peeling function is used, the cover tape 20b can be peeled off just before the supply position 4c, so it is used when it is desired to reduce the number of discarded parts during setup change. In this case, with the opening/closing cover 9 open (see FIG. 7), the first carrier tape 20 is transported along the transport path 4, and the leading end reaches the downstream side of the peeling part 23a of the tape guide 23. let

Next, in this state, the cover tape 20b is peeled off from the carrier tape 20 by manual operation, and the peeled part 23a is folded back and guided to the cover tape discharge path 24. By closing the open/close cover 9 in this state, the cover tape 20b is sandwiched between the drive roller 21 and the driven roller 22. This allows these rollers to separate the cover tape 20b from the carrier tape 20 and discharge it to the cover tape storage section 2f.

Next, the configuration and function of the tape detection section 13 that detects the carrier tape 20 in the transport path 4 will be explained. First, the configuration of the tape detection section 13 will be explained with reference to FIG. As shown in FIGS. 12(a) and 12(b), the tape detection unit 13 includes a dog member 14 and an optical sensor on one side (lower side in the example shown here) of the conveyance path 4 in the main body 2 of the tape feeder 1. 13a is arranged.

The dog member 14 is rotatably provided via a movable fulcrum 14c, and includes a contact portion 14f that contacts the carrier tape 20. In the process of transporting the carrier tape 20 along the transport path 4, the carrier tape 20 contacts the contact portion 14f, thereby causing the dog member 14 to rotate around the movable fulcrum 14c. By detecting this rotation with the optical sensor 13a, the presence or absence of the carrier tape 20 at the tape detection position where the tape detection unit 13 is placed in the transport path 4 is detected. Therefore, the optical sensor 13a serves as a detection section that detects the carrier tape 20 by detecting the rotation of the dog member 14.

With such a configuration, it is possible to eliminate the problem that occurs when the carrier tape 20 is directly detected by the optical sensor 13a, that is, the erroneous detection that occurs when the carrier tape 20 is made of a material that has translucency. Therefore, even if the carrier tape 20 made of a translucent material such as resin is the detection target, it is possible to perform reliable tape detection.

Here, the cross-sectional shape of the conveyance path 4 will be explained with reference to FIG. 14. As shown in FIGS. 14(a) and 14(b), the conveyance path 4 for guiding and conveying the carrier tape 20 in the main body 2 of the tape feeder 1 has a groove 4d for accommodating the embossed portion 20e of the carrier tape 20. It is provided.

As shown in FIG. 14(a), the carrier tape 20 is conveyed along the conveyance path 4 with the embossed portion 20e accommodated in the groove portion 4d. During conveyance of the carrier tape 20, the stepped portions on both sides of the groove portion 4d serve as support portions 4e that abut and support the end portion 20f of the base tape 20a extending outward from the embossed portion 20e in the carrier tape 20. .

The dog member 14 is arranged such that the contact portion 14f contacts the end portion 20f of the base tape 20a supported by the support portion 4e. The carrier tape 20 is detected by the dog member 14 when the contact portion 14f of the dog member 14 comes into contact with the end portion 20f of the base tape 20a supported by the support portion 4e, as shown in FIG. 14(a). This is done by

In this way, in the tape detecting section 13 shown in this embodiment, the dog member 14 is arranged so that the contact portion 14f does not interfere with the embossed portion 20e. Thereby, it is possible to prevent conveyance problems caused by the contact portion 14f of the dog member 14 coming into contact with the embossed portion 20e of the carrier tape 20, and tape detection can be performed stably and reliably.

The detailed structure of the tape detecting section 13 having the above configuration will be explained below. As shown in FIG. 12(a), a concave portion 2i is formed below the oblique portion of the conveyance path 4 in the main body 2 by cutting a frame member constituting the main body 2 into a predetermined shape in the thickness direction. has been done. As shown in FIGS. 12(a) and 12(b), a dog member 14 and an optical sensor 13a, which will be described below, are accommodated in the recessed portion 2i without protruding from the main body portion 2 in the thickness direction.

The dog member 14 is rotatably held by a movable fulcrum 14c located near the lower side of the conveyance path 4 (arrow g). The first rotating part 14a and the second rotating part 14b, which are provided on both sides of the movable fulcrum 14c in the dog member 14, have a shape that allows rotation along the inner peripheral surface of the recessed part 2i. .

An opening 14e having a shape that defines a rotatable range of the dog member 14 is provided in the first rotating portion 14a on one side. A stopper convex portion 2k is provided on the bottom surface of the concave portion 2i and positioned within the opening 14e, and when the stopper convex portion 2k comes into contact with the inner peripheral surface of the opening 14e, the movable fulcrum of the dog member 14 is formed. Rotation around 14c is restricted. That is, when the first rotating portion 14a rotates clockwise and the inner circumferential surface of the opening 14e contacts the stopper convex portion 2k, the first rotating portion 14a is at the upper limit position.

A contact portion 14f extending upward is provided at the upper end of the first rotating portion 14a. As the first rotating portion 14a rotates around the movable fulcrum 14c, the contact portion 14f is displaced in a direction across the conveyance path 4 (arrow h). When the first rotating portion 14a rotates clockwise and is at the upper limit position, the contact portion 14f extends up to the notch 2j (see FIG. 14) formed in the main body 2 across the conveyance path 4. It has been reached.

The second rotating portion 14b on the other side rotates symmetrically with respect to the rotation of the first rotating portion 14a and the movable fulcrum 14c. That is, when the contact portion 14f is displaced in the direction of arrow h, the lower end portion of the second rotating portion 14b is displaced in the direction of arrow i. As a result, the light shielding part 14d provided at the lower end of the second rotating part 14b is similarly displaced in the direction of arrow i.

The tape detection section 13 includes an optical sensor 13a that is combined with the dog member 14 and detects the carrier tape 20. The optical sensor 13a has a light projecting section 13b that projects detection light and a light receiving section 13c that receives the projected detection light. The light shielding part 14d provided on the second rotating part 14b of the dog member 14 is arranged to move forward and backward between the light projecting part 13b and the light receiving part 13c.

When the light blocking section 14d extends between the light projecting section 13b and the light receiving section 13c, the detection light (arrow j) projected from the light projecting section 13b is blocked by the light blocking section 14d and is not received by the light receiving section 13c. . On the other hand, when the light shielding part 14d is retracted from between the light projecting part 13b and the light receiving part 13c, the detection light projected from the light projecting part 13b (see arrow n shown in FIG. 13(b)) is The light is directly received by the light receiving section 13c. A detection signal indicating whether or not the detection light is received by the optical sensor 13a is transmitted to the determination section 40, and the determination section 40 determines whether or not the carrier tape 20 is present in the transport path 4 based on this detection signal.

FIG. 13 shows the operation of detecting the carrier tape 20 by the tape detection section 13 configured as described above. First, FIG. 13(a) shows a state in which the carrier tape 20 is not present on the transport path 4. In this case, since the contact portion 14f does not contact the carrier tape 20, the first rotating portion 14a is at the upper limit position where the contact portion 14f has advanced into the cutout portion 2j. In this state, the light blocking section 14d provided on the second rotating section 14b extends between the light projecting section 13b and the light receiving section 13c. As a result, the detection light (arrow j) projected from the light projecting section 13b is blocked by the light blocking section 14d (see FIG. 12(a)).

Next, FIG. 13(b) shows a state in which the carrier tape 20 is present on the transport path 4. In this case, the contact portion 14f contacts the base tape 20a of the carrier tape 20 (see end portion 20f shown in FIG. 14(a)). Due to the contact of the contact portion 14f with this end portion 20f, the contact portion 14f is pushed down (arrow k), and the dog member 14 rotates counterclockwise (arrow m).

Due to this rotation, the light blocking section 14d retreats from between the light projecting section 13b and the light receiving section 13c (arrow n). Thereby, the detection light (arrow o) projected from the light projecting section 13b is received by the light receiving section 13c without being blocked by the light blocking section 14d. By transmitting this detection signal to the determining section 40, the determining section 40 determines that the carrier tape 20 is present in the transport path 4.

That is, in the tape detection section 13 having the above configuration, the dog member 14 is positioned between the light projecting section 13b and the light receiving section 13c in a state where the carrier tape 20 is not in contact with the contact section 14f, and blocks the detection light. It has a light shielding part 14d. When the carrier tape 20 comes into contact with the contact part 14f and the dog member 14 rotates, the light shielding part 14d operates to retreat from between the light projecting part 13b and the light receiving part 13c.

Then, the determining unit 40 determines that the carrier tape 20 has been detected when the light shielding unit 14d retreats from between the light projecting unit 13b and the light receiving unit 13c and the light receiving unit 13c receives the detection light. A determination signal indicating the detection result of the carrier tape 20 is transmitted to the feeder control section 12, and the operation control of the tape feeder 1 by the feeder control section 12 is executed with reference to this detection result.

As described above, the component supply device shown in this embodiment transports the carrier tape 20 that has a plurality of pockets 20c containing components P and has a cover tape 20b attached to seal the pockets 20c. , a tape feeder 1 serving as a component supply device for supplying components P to a component mounting apparatus M, which conveys the carrier tape 20 by engaging with a feed hole 20d provided in the carrier tape 20 and rotating, A tape feeding sprocket 6 and a positioning sprocket 7 as transport sprockets that supply the component P to the supply position 4c to the component mounting apparatus M, and a roller that peels the cover tape 20b from the carrier tape 20 and pulls in the peeled cover tape 20b. A driving roller 21 and a driven roller 22, a first motor 5 as a single motor that generates torque to drive these conveyance sprockets and rollers, and a first motor 5 that generates torque to drive these conveyance sprockets and rollers. It is configured to include a transmission mechanism for transmitting information to the rollers. With this configuration, transport of the carrier tape 20 in the tape feeder 1 and peeling of the cover tape 20b can be performed by a single drive source, making it possible to reduce equipment costs and make the equipment more compact.

Further, the component supply device shown in this embodiment is a tape feeder 1 that is a component supply device capable of conveying a carrier tape 20 in which a plurality of embossed portions 20e in which components P are stored are formed intermittently at a predetermined pitch. There is a conveyance path 4 through which the carrier tape 20 is conveyed, a dog member 14 rotatably provided via a movable fulcrum 14c and provided with a contact portion 14f that comes into contact with the carrier tape 20, and a rotation of the dog member 14. It has an optical sensor 13a as a detection unit that detects the carrier tape 20 by detecting movement, and the conveyance path 4 has a groove 4d that accommodates the embossed part 20e and extends outward from the embossed part 20e in the carrier tape 20. The dog member 14 has a support portion 4e that abuts and supports the end portion 20f, and the dog member 14 is arranged such that the abutment portion 14f does not interfere with the embossed portion 20e. With this configuration, it is possible to prevent conveyance defects caused by the dog member 14 interfering with the embossed part 20e, and even when an embossed tape with a plurality of protruding embossed parts is to be detected, it is possible to detect the presence or absence of the tape. Detection can be performed reliably.

Note that the component supply device shown in this embodiment can also transport and supply components for a paper tape type carrier tape.

The component supply device of the present invention has the effect that even when the detection target is an embossed tape with a plurality of protruding embossed parts, the presence or absence of the tape can be reliably detected. The present invention is useful in the technical field where components are taken out and supplied to a component mounting device.

1 Tape feeder 3 Tape conveyance section 4 Conveyance path 4c Supply position 4d Groove section 4e Support section 5 First motor 6 Tape feed sprocket 7 Positioning sprocket 13 Tape detection section 13a Optical sensor 13b Light projecting section 13c Light receiving section 14 Dog member 14f Contact Part 14d Light shielding part 15 First carrier tape transport part 20 Carrier tape 20e Embossed part 20f End part

Claims (4)

A component supply device capable of conveying a carrier tape on which a plurality of embossed portions in which components are stored are formed intermittently at a predetermined pitch,
a conveyance path through which the carrier tape is conveyed;
a dog member that is rotatably provided via a movable fulcrum and includes a contact portion that contacts the carrier tape;
a detection unit that detects the carrier tape by detecting rotation of the dog member;
The conveyance path includes a groove portion that accommodates the embossed portion, and a support portion that abuts and supports an end portion of the carrier tape that extends outward from the embossed portion,
The dog member is arranged so that the contact portion does not interfere with the embossed portion,
a regulating portion regulating a rotation range of the dog member ;
The detection unit is an optical sensor having a light projecting unit that projects detection light and a light receiving unit that receives the projected detection light,
The dog member has a light shielding part that is located between the light projecting part and the light receiving part and blocks the detection light,
In the component supply device , the contact portion and the light shielding portion are positioned across the movable fulcrum of the dog member . The parts supply device according to claim 1,
In the component supply device, the dog member is arranged such that the abutting portion abuts the end portion. The parts supply device according to claim 1 or 2,
The light shielding part blocks the detection light when the carrier tape is not in contact with the contact part , and when the carrier tape is in contact with the contact part and the dog member rotates, the projection light is blocked. A component supply device that is retracted from between the light section and the light receiving section. The parts supply device according to claim 3,
A component supply device comprising: a determination unit that determines that a carrier tape has been detected when the light shielding unit is retracted from between the light projecting unit and the light receiving unit and the light receiving unit receives the detection light.

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