CN116963487A - Carrier tape conveying device and tape feeder - Google Patents

Abstract

The invention provides a carrier tape conveying device capable of reducing defects caused by foreign matters and a tape feeder provided with the carrier tape conveying device. The carrier tape conveying device conveys a carrier tape, and the carrier tape accommodating member is provided with feed holes at a prescribed interval. The carrier tape conveying device is provided with: a frame having a conveying surface for supporting and guiding the conveyed carrier tape from below; and a sprocket having a plurality of pins protruding radially in correspondence with the pitch of the feed holes, wherein the carrier tape is conveyed by engaging the pins with the feed holes by rotating the pins while protruding upward from an opening formed in the conveying surface. The length of the portion of the pin hidden below the conveying surface is long compared to the length of the portion of the pin protruding from the conveying surface.

Description

Carrier tape conveying device and tape feeder

Technical Field

The present disclosure relates to a carrier tape conveying apparatus for conveying a carrier tape of a storage member and a tape feeder provided with the carrier tape conveying apparatus.

Background

Conventionally, in a component mounting apparatus that takes out a component stored in a carrier tape by a mounting head and mounts the component on a substrate, a tape feeder that supplies a component to a component supply position where the mounting head takes out the component is known. The tape feeder is incorporated with a carrier tape conveying device that conveys a carrier tape. The component mounting apparatus prepares a plurality of tape feeders for each type of component mounted on a substrate, and disposes the tape feeders adjacent to each other for use.

When the type of the substrate to be produced is changed, the unnecessary tape feeder is replaced. The sizes of the components to be handled by the component mounting apparatus vary, and small components of 0.4mm×0.2mm or less are included. An opening is formed in a conveying surface of the conveying carrier belt, and pins of a sprocket of the carrier belt conveying device protrude from the opening. Therefore, there is a case where a component scattered from a carrier tape during a replacement operation falls into the tape feeder from an opening, and a tape feeder employing a structure in which such a failure is assumed is known (patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2014-67848

Disclosure of Invention

Problems to be solved by the invention

In the structure of patent document 1, since the size of the opening is large, the component is liable to fall into the tape feeder. Therefore, it is considered to reduce the size of the opening to a size that does not interfere with the rotation of the sprocket pin. However, if the size of the opening is reduced, foreign matter that is interposed between the pins of the sprocket may get stuck between the pins and the edges of the opening, and the rotation of the sprocket may be stopped.

Accordingly, an object of the present disclosure is to solve the above-described conventional problems and to provide a carrier tape conveying apparatus and a tape feeder provided with the carrier tape conveying apparatus, which reduce defects caused by foreign substances.

Means for solving the problems

The carrier tape conveying device of the present disclosure conveys a carrier tape, which is provided with feed holes at prescribed intervals and which accommodates components. The carrier tape conveying device comprises: a frame having a conveying surface for supporting and guiding the conveyed carrier tape from below; and a sprocket having a plurality of pins protruding radially in accordance with the pitch of the feed holes, wherein the carrier tape is conveyed by engaging the pins with the feed holes by rotating the pins while protruding upward from an opening formed in the conveying surface. The length of the portion of the pin hidden below the conveying surface is long compared to the length of the portion of the pin protruding from the conveying surface.

The tape feeder of the present disclosure is a tape feeder that conveys a carrier tape provided with feed holes at a predetermined pitch and supplies components housed in the carrier tape to a component supply position. The tape feeder includes the carrier tape conveying device described above, and supplies the component to the component supply position by conveying the carrier tape by the carrier tape conveying device.

Effects of the invention

According to the present disclosure, a component conveying device that reduces defects caused by foreign matter and a tape feeder provided with the component conveying device can be provided.

Drawings

Fig. 1 is a schematic view of a component mounting device according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of a tape feeder of an embodiment of the present disclosure.

Fig. 3 is a partial top view of the periphery of the component feeding position of the tape feeder.

Fig. 4 is an explanatory diagram showing a schematic cross section in view V of fig. 2.

Fig. 5 is a schematic perspective view of the carrier tape.

Fig. 6 is a partially enlarged perspective view of the carrier tape conveying apparatus.

Fig. 7 is a YZ plan view of the carrier tape transporting apparatus.

Fig. 8 is a longitudinal cross-sectional view of the XZ plane of the carrier tape transporting apparatus.

Fig. 9 is a partial side view of the sprocket.

Reference numerals illustrate:

1. component mounting device

1a base station

2. Substrate conveying mechanism

3. Substrate board

4. Mounting head

5. Trolley

6. Tape feeder

7. Carrier tape

7a Baseband

7b top belt

7c groove

7d feed hole

7e storage part

8. Reel disc

9. Reel holding part

10. Mounting control unit

11. Main body cover

12. Recovery box

13. Discharge chute

14. Cutting part

15. Reader device

16. Component part

17. Unit control part

20. Belt conveying path

20a insertion opening

20b discharge port

21. Carrier tape conveying device

25. Motor with a motor housing

26. First sprocket wheel

28. Second sprocket wheel

28a pin

28d pin bottom

28e pin front end

30 third sprocket

30a pin

38 inner cover

59 foreign matter receiving portion

59a groove

59b first foreign matter guide portion

59c second foreign matter guide portion

60 main body portion

61 base

62 main frame

62g conveying surface

62h foreign matter discharge hole

62k cover assembly part

62m foreign matter discharge outlet

62L first surface

62R second face

63 subframe

80 exposed part

90 belt cover

90a component outlet

90b, 90c relief holes

93 foreign matter

622. 623 opening portion

Hb depth

J rotary shaft

P1 part supply position

Pt1 spacing.

Detailed Description

According to a first aspect of the present disclosure, a carrier tape conveying device conveys a carrier tape that accommodates components and is provided with feed holes at prescribed intervals. The carrier tape conveying device is provided with: a frame having a conveying surface for supporting and guiding the conveyed carrier tape from below; and a sprocket having a plurality of pins protruding radially in correspondence with the pitch of the feed holes, wherein the carrier tape is conveyed by engaging the pins with the feed holes by rotating the pins while protruding upward from an opening formed in the conveying surface. The length of the portion of the pin hidden below the conveying surface is long compared to the length of the portion of the pin protruding from the conveying surface.

According to the carrier tape conveying apparatus of the first aspect, even when foreign matter enters from the opening portion and remains between the pins of the sprocket, the length of the portion of the pins hidden below the conveying surface is longer than the length of the portion of the pins protruding from the conveying surface, and therefore the foreign matter is liable to fall below the conveying surface. This reduces the problem that foreign matter is caught between the pin and the edge of the opening, and the carrier tape cannot be conveyed.

According to a second aspect of the present disclosure, there is provided the component conveying device as defined in the first aspect, wherein the total length of the pins is longer than the interval of root portions of adjacent pins, that is, the inter-pin distance. This can further reduce the problem that foreign matter is likely to fall below the conveying surface and is caught between the pin and the edge of the opening, and the carrier tape cannot be conveyed.

According to a third aspect of the present disclosure, there is provided the component conveying device according to the first or second aspect, wherein the lower portion of the sprocket has a foreign matter receiving portion that receives a foreign matter that falls down with rotation of the sprocket, the foreign matter entering from the opening portion and remaining on a surface of the sprocket sandwiched by the pins. The foreign matter receiving portion can prevent foreign matter from moving to unexpected places in the carrier tape conveying device.

According to a fourth aspect of the present disclosure, there is provided the component conveying device according to any one of the first to third aspects, having a foreign matter guide portion that guides the foreign matter to the discharge portion. Thus, the foreign matter that has entered the carrier tape conveying device can be reliably discharged.

According to a fifth aspect of the present disclosure, there is provided the component conveying device according to the fourth aspect, wherein a portion recessed downward is provided in the foreign matter guide portion, and a groove that collects the foreign matter falling to the foreign matter guide portion is formed. This can prevent foreign matter from entering the carrier tape transporting apparatus from freely moving inside the apparatus.

According to a sixth aspect of the present disclosure, there is provided the component conveying device according to the fifth aspect, wherein the discharge portion is disposed at a portion where the groove is located. Thus, the foreign matter introduced into the carrier tape conveying device can be reliably discharged.

According to a seventh aspect of the present disclosure, there is provided a tape feeder that conveys a carrier tape provided with feed holes at a predetermined pitch and supplies components stored in the carrier tape to a component supply position, the tape feeder including the carrier tape conveying device according to any one of the first to sixth aspects, the carrier tape conveying device conveying the carrier tape to supply the components to the component supply position. Thereby, the tape feeder can be realized in which the trouble caused by the foreign matter is reduced.

Exemplary embodiments of the component mounting apparatus of the present disclosure are described below with reference to the drawings. The present disclosure is not limited to the specific configurations of the following embodiments, and configurations based on the same technical ideas are included in the present disclosure.

(embodiment)

The structure of a component mounting apparatus 1 according to an embodiment of the present disclosure will be described with reference to fig. 1. Fig. 1 is a schematic view of a component mounting apparatus 1. In fig. 1, an X direction (a direction perpendicular to the paper surface in fig. 1) of the substrate conveyance direction and a Y direction (a left-right direction in fig. 1) orthogonal to the substrate conveyance direction are shown as two axial directions orthogonal to each other in a horizontal plane. The Z direction (vertical direction and longitudinal direction in fig. 1) is shown as the height direction orthogonal to the horizontal plane. The radial direction represents the radial direction of the rotary shaft, and the thrust direction represents the axial direction of the rotary shaft.

The component mounting apparatus 1 manufactures a mounting substrate on which components are mounted. The substrate conveying mechanism 2 provided on the upper surface of the base 1a conveys, positions and holds the substrate 3 in the X direction. A mounting head 4 that moves in the horizontal direction (X direction, Y direction) by a head moving mechanism (not shown) is provided above the substrate conveying mechanism 2. A plurality of tape feeders 6 are arranged in the X direction on the upper part of the carriage 5 coupled to the base 1a, laterally of the substrate conveying mechanism 2. The tape feeder 6 is a component feeder that feeds components to the component mounting device 1.

A reel holding portion 9 is provided on the front side of the carriage 5 and below the tape feeder 6, the reel holding portion 9 rotatably supporting a reel 8, and the reel 8 is wound with a carrier tape 7 for accommodating components supplied to the component mounting device 1. The tape feeder 6 conveys the carrier tape 7 stored in the reel 8 in the tape feed direction, and supplies components to the component supply position P1 based on the mounting head 4.

The component mounting apparatus 1 includes a substrate conveying mechanism 2, a mounting head 4, and a mounting control unit 10 that controls a head movement mechanism. The mounting control unit 10 sends a component supply command to the unit control unit 17 of the tape feeder 6, controls the mounting head 4 and the head moving mechanism, and performs a component mounting operation of transferring and mounting components to and from the mounting point of the substrate 3 held by the substrate conveying mechanism 2 by taking out components supplied from the tape feeder 6 to the component supply position P1 by the mounting head 4. In this way, the tape feeder 6 is a tape feeder that supplies the components stored in the carrier tape 7 to the component mounting apparatus 1. The component accommodated in the carrier tape 7 is, for example, a chip-type electronic component. A main body cover 11 which can be opened and closed is provided above the base 1a and the carriage 5, and the main body cover 11 is covered so that an operator does not contact a movable mechanism such as the mounting head 4 during the operation.

The mounting control unit 10 includes a storage unit, and is configured by a circuit such as a processor or FPGA, and a storage unit such as a memory or SSD.

In fig. 1, a recovery box 12 is provided at a lower portion of the carriage 5, and the recovery box 12 recovers the empty carrier tape 7 that is discharged from the rear of the tape feeder 6 after components are taken out by the mounting head 4. A discharge chute 13 is provided on the rear side of the carriage 5, and the discharge chute 13 guides the empty carrier tape 7 discharged from the tape feeder 6 to the recovery box 12. The discharge chute 13 is provided with a cutting portion 14, and the cutting portion 14 cuts the empty carrier tape 7 by a predetermined length. The empty carrier tape 7 discharged from the tape feeder 6 is cut by the cutting portion 14 and collected in the collection box 12.

Tape feeder

Next, the structure of the tape feeder 6 will be described with reference to fig. 2 to 4. Fig. 2 is a schematic diagram of the tape feeder 6 of the embodiment. Fig. 3 is a partial plan view of the periphery of the component feeding position P1 of the tape feeder 6. Fig. 4 is an explanatory diagram showing a schematic cross section in view V of fig. 2.

The tape feeder 6 includes a tape conveying path 20, an exposing portion 80, and a carrier tape conveying device 21 in the main body portion 60, and the tape conveying path 20 includes: an insertion port 20a into which the carrier tape 7 is inserted, and an ejection port 20b from which the carrier tape 7 is ejected. The main body 60 of the tape feeder 6 is composed of a plurality of members such as a base 61, a main frame 62, and a sub-frame 63. The base 61 is a portion fixed to the carriage 5, and a main frame 62 and a sub-frame 63 are fixed in parallel thereto. The main frame 62 and the sub-frame 63 are elongated plate-like members in cross section (see fig. 4) viewed from the Y direction, and the tape conveying path 20 is formed in a space sandwiched between the main frame 62 and the sub-frame 63. The main frame 62 is a frame constituting the carrier tape conveying device 21 that conveys the carrier tape 7 along the tape conveying path 20, and is assembled with a plurality of first to third sprockets 26, 28, 30 and a motor 25 for driving them.

The tape conveying path 20 guides the carrier tape 7 inserted into the tape conveying path 20 from the insertion port 20a to the component supply position P1, and further to the discharge port 20b. The exposing portion 80 peels off the top tape 7b of the carrier tape 7 (see fig. 5) from the carrier tape 7, and exposes the member 16 packed in the carrier tape 7. The exposing portion 80 of the present embodiment adopts a method of peeling the top tape 7b from the carrier tape 7, but the member 16 may be exposed by cutting the top tape 7b with a cutter or the like.

The insertion port 20a opens on the upstream side (left side in fig. 2) in the tape feeding direction of the tape conveying path 20. The discharge port 20b is opened on the downstream side (right side in fig. 2) in the tape feeding direction. The tape conveying path 20 communicates from the insertion port 20a to the discharge port 20b. The belt conveying path 20 is an open section that opens upward from the section from the second sprocket 28 to the third sprocket 30. The body 60 is provided with a belt cover 90 covering the upper side of the open area. As shown in fig. 3, the tape cover 90 is disposed so as to straddle the upper portion of the main frame 62 and the upper portion of the sub-frame 63, and a component outlet 90a is formed at a position corresponding to the component supply position P1. A cover fitting portion 62k for fitting the belt cover 90 is provided on the upper outer side surface of the main frame 62. The cover fitting portion 62k is, for example, concave, stepped.

In this open section, an opening 622 (see fig. 6) for exposing the pin 28a of the second sprocket 28 is provided in the main frame 62. The pins 28a exposed from the openings 622 engage with the feed holes 7d of the carrier tape 7, and the carrier tape 7 is positioned in accordance with the rotation of the second sprocket 28. The second sprocket 28 causes the carrier tape 7 to travel along the conveying surface 62g below the tape cover 90, and conveys the component 16 accommodated in the groove 7c of the carrier tape 7 to the component supply position P1.

The mounting head 4 takes out the components 16 accommodated in the carrier tape 7 from the component take-out port 90a. The belt cover 90 has escape holes 90b and 90c (see fig. 3) for avoiding interference with the second sprocket 28 and the third sprocket 30.

Carrier tape

Next, the carrier tape 7 will be described in detail with reference to fig. 5. Fig. 5 is a schematic perspective view of the carrier tape 7.

The carrier tape 7 has a base tape 7a and a top tape 7b. The base tape 7a is provided with storage portions 7e formed in a row at equal intervals in the longitudinal direction by embossing. A recess 7c opening upward is formed inside the housing portion 7e, and the members 16 are housed in the respective recesses 7 c. The top tape 7b is adhered to the upper surface of the base tape 7a, and the member 16 is enclosed in the groove 7 c. At a position parallel to the column of the grooves 7c of the base tape 7a, a plurality of feed holes 7d are arranged at a pitch Pt1 of one row and equal intervals. The depth Hb of the groove 7c of the receiving member 16 is a size corresponding to the size of the received member. The width Wa of the carrier tape 7 is also appropriately selected according to the size of the component.

Carrier tape conveying device

Next, the carrier tape conveying apparatus 21 will be described with reference to fig. 2 and 7. Fig. 7 is a YZ plan view of the carrier tape transporting apparatus 21.

The carrier tape conveying device 21 conveys the carrier tape 7 to the component supply position P1 on the downstream side of the tape conveying path 20. The carrier tape transport apparatus 21 includes a main frame 62, at least 1 sprocket, a motor 25, and a plurality of drive gears for transmitting power of the motor 25 to the sprocket and rotating the same. The carrier tape transport apparatus 21 of the present embodiment includes three sprockets, that is, a first sprocket 26, a second sprocket 28, and a third sprocket 30.

The first sprocket 26 is mounted so as to be rotatable about a horizontal rotation axis parallel to the X direction with respect to the main frame 62. The second sprocket 28 is mounted rotatably about a horizontal rotation axis J (see fig. 4) parallel to the X direction with respect to the main frame 62. The third sprocket 30 is mounted rotatably about a horizontal rotation axis parallel to the X direction with respect to the main frame 62.

The carrier tape transport apparatus 21 further includes a plurality of drive gears that transmit the drive force of the motor 25, and the output of the motor 25 is transmitted to the first sprocket 26, the second sprocket 28, and the third sprocket 30 via the plurality of gears, respectively.

Next, the main frame 62 of the carrier tape transporting apparatus 21 will be described with reference to fig. 8. Fig. 8 is a longitudinal cross-sectional view of the XZ plane of the carrier tape transporting apparatus 21.

As shown in fig. 8, the main frame 62 has a first surface 62L and a second surface 62R as side surfaces, and the first surface 62L and the second surface 62R are extended longitudinally and laterally (parallel to the YZ plane) along the conveying direction of the carrier tape 7 on the tape conveying path 20. The main frame 62 is a plate-like member having a small thickness dimension T sandwiched between the first surface 62L and the second surface 62R. Therefore, the cross section (XZ cross section) of the main frame 62 orthogonal to the conveying direction of the carrier tape 7 is long.

The main frame 62 is formed with a flat conveying surface 62g at an upper portion, and the conveying surface 62g is used to guide the carrier tape 7 along the tape conveying path 20. The conveying surface 62g is formed with a plurality of openings through which pins of the sprockets protrude. For example, in the opening 622, the pin 28a of the second sprocket 28 protrudes from the conveying surface 62g. Further, in the opening 623 downstream thereof, the pin 30a of the third sprocket 30 protrudes from the conveying surface 62g.

These pins 28a and 30a are inserted into the feed holes 7d of the carrier tape 7 located on the conveying surface 62g. Therefore, when the first to third sprockets 26, 28, 30 rotate, the carrier tape 7 is fed out by the pins of the sprockets and moves along the conveying surface 62g. A foreign matter receiving portion 59 is disposed below the first to third sprockets 26, 28, 30, and the foreign matter receiving portion 59 guides foreign matter entering between pins of the respective sprockets to the foreign matter discharge hole 62h and the foreign matter discharge port 62 m.

Next, the collection of the foreign matter 93 falling between the pins 28a will be described with reference to fig. 7 and 8. The foreign matter 93 is, for example, dust, a member 16 scattered from the carrier tape 7 during the replacement operation of the tape feeder 6, or the like.

The foreign matter receiving portion 59 receives the foreign matter 93 which enters from each opening portion and is held by the pin of each sprocket to remain on the sprocket surface, and the foreign matter 93 falls down with the rotation of the sprocket. For example, inside the main frame 62, the front ends of the pins 28a of the second sprocket 28 are surrounded by the foreign matter receiving portion 59. The foreign matter receiving portion 59 is disposed between the main frame 62 and the inner cover 38.

The foreign matter receiving portion 59 has a first foreign matter guide portion 59b and a second foreign matter guide portion 59c, and the first foreign matter guide portion 59b and the second foreign matter guide portion 59c guide the foreign matter 93 to a foreign matter discharge hole 62h and a foreign matter discharge port 62m, respectively, as discharge portions. The first foreign matter guide 59b guides, for example, the foreign matter 93 that enters the main frame 62 as the second sprocket 28 rotates, to the groove 59a disposed below the second sprocket 28. The first foreign matter guide portion 59b is a portion of the upper surface of the foreign matter receiving portion 59, and is formed along a circle connecting the tips of the pins 28a of the second sprocket 28.

The groove 59a is a concave portion recessed downward from the first foreign matter guide portion 59b, and is connected to a foreign matter discharge hole 62h formed in the main frame 62 and communicating with the outside. The foreign matter 93 falling between the pins 28a rotates together with the second sprocket 28, falls down to the first foreign matter guide 59b, and is collected in the groove 59a. The foreign matter discharge hole 62h is disposed at a portion where the groove 59a is located, for example, at a lower portion of the groove 59a. The operator can collect the foreign matter 93 collected in the groove 59a through the foreign matter discharge hole 62 h.

A second foreign matter guide portion 59c is formed below the third sprocket 30 by the foreign matter receiving portion 59. The second foreign matter guide portion 59c guides the foreign matter 93 dropped into the main frame 62 toward the foreign matter discharge port 62m together with the rotation of the third sprocket 30. The second foreign matter guide portion 59c is a part of the upper surface of the foreign matter receiving portion 59, and is inclined downward. The foreign matter 93 dropped from the third sprocket 30 into the second foreign matter guide 59c moves along the second foreign matter guide 59c by its own weight, and is discharged from the foreign matter discharge port 62m to the outside of the main frame 62.

Next, the length of the sprocket pin will be described with reference to fig. 9. Fig. 9 is a partial side view of the sprocket. The length of the pin 28a of the second sprocket 28 is described here, but the pins of the first sprocket 26 and the pins 30a of the third sprocket 30 may have the same configuration.

The upper portions of the pins 28a of the second sprocket 28 protrude upward from the conveying surface 62g of the carrier tape 7. The length of the portion Lp2 not protruding from the conveying surface 62g is longer than the length Lp1 of the pin 28a of the portion protruding upward from the conveying surface 62g of the carrier tape 7. In other words, the length Lp2 from the pin bottom 28d of the second sprocket 28 to the conveying surface 62g of the carrier tape 7 is longer than the length Lp1 of the pin 28a of the second sprocket 28 protruding from the conveying surface 62g of the carrier tape 7. Thus, even if the foreign matter 93 falls between the two pins 28a, the length Lp2 of the pin 28a is long, so that the foreign matter 93 can be prevented from entering a position below the conveying surface 62g and being sandwiched between the edge of the opening 622 and the pin 28 a.

In addition, the overall length Lp3 of the pin 28a of the second sprocket 28 is greater than the largest dimension of the member 16. In other words, the difference Lp3 between the radius Rt to the pin nose 28e of the second sprocket 28 and the radius Rb of the pin bottom 28d of the second sprocket 28 is greater than the largest dimension of the member 16. Thereby, even if the member 16 falls as the foreign matter 93 between the two pins 28a, the case of being sandwiched between the edge of the opening 622 and the pins 28a can be further reduced.

In addition, the entire length Lp3 of the pin 28a of the second sprocket 28 is longer than the interval between the root portions of the adjacent pins 28a, that is, the inter-pin distance Dp. Thus, even when the foreign matter 93 intrudes into the opening 622 and remains between the pins 28a of the second sprocket 28, the foreign matter 93 is prevented from being caught by the edges of the pins 28a and the opening 622, and the carrier tape 7 cannot be conveyed. In addition, the capability of catching the foreign matter 93 between the pins 28a of the second sprocket 28 becomes high, and the possibility of falling unambiguated inside the carrier tape conveyor 21 can be reduced.

The carrier tape conveying device 21 of the present embodiment conveys the carrier tape 7, and the carrier tape 7 accommodates the members 16 and is provided with the feed holes 7d at a predetermined pitch Pt 1. The carrier tape transport apparatus 21 includes a main frame 62 and a second sprocket 28. The main frame 62 has a conveying surface 62g for supporting and guiding the conveyed carrier tape 7 from below. The second sprocket 28 has a plurality of pins 28a protruding radially in accordance with the pitch Pt1 of the feed holes 7d, and the second sprocket 28 conveys the carrier tape 7 by rotating the pins 28a while protruding upward from the openings 622 formed in the conveying surface 62g, and engaging the pins 28a with the feed holes 7d. The length LP2 of the portion of the pin 28a hidden below the conveying surface 62g is longer than the length LP1 of the portion of the pin 28a protruding from the conveying surface 62g.

Even when the foreign matter 93 as the foreign matter intrudes into the inside from the opening 622 and remains between the pins 28a of the second sprocket 28, the foreign matter 93 easily falls below the conveying surface because the length Lp2 of the pins 28a is longer than the length Lp 1. This can prevent the foreign matter 93 from being caught between the pin 28a and the edge of the opening 622, and the carrier tape 7 from being transported.

In the carrier tape transporting apparatus 21 according to the present embodiment, the total length Lp3 of the pins 28a is longer than the inter-pin distance Dp, which is the interval between the root portions of the adjacent pins 28 a. This can further reduce the foreign matter 93 from being caught between the pin 28a and the edge of the opening 622. Further, the ability to catch the foreign matter 93 between the pins 28a of the second sprocket 28 becomes high, and the possibility that the foreign matter 93 falls unambiguately inside the carrier tape conveyor 21 is reduced.

In the carrier tape conveying apparatus 21 according to the present embodiment, the foreign matter receiving portion 59 that receives the foreign matter 93 that falls down with the rotation of the second sprocket 28 is provided below the second sprocket 28, and the foreign matter 93 enters from the opening 622 and remains on the surface of the second sprocket 28 sandwiched by the pins 28 a.

In the structure of patent document 1, foreign matter such as a component that falls into the tape feeder may freely move in a gap inside the tape feeder, and foreign matter that falls out may cause a failure. In the carrier tape conveyor apparatus 21 of the present embodiment, the foreign matter receiving portion 59 can prevent the foreign matter 93 from moving to an unexpected place inside the carrier tape conveyor apparatus 21.

The carrier tape conveying apparatus 21 according to the present embodiment includes first and second foreign matter guide portions 59b and 59c for guiding the foreign matter 93 to the foreign matter discharge hole 62h and the foreign matter discharge port 62m in the foreign matter receiving portion 59. In patent document 1, it is complicated to take out foreign matter that has entered the inside of the tape feeder to the outside of the tape feeder, but the foreign matter 93 that has entered the inside of the carrier tape conveyor 21 can be reliably and easily discharged by the first and second foreign matter guide portions 59b, 59c.

In the carrier tape conveying apparatus 21 according to the present embodiment, the first foreign matter guide 59b is provided with a portion recessed downward, and a groove 59a is formed to collect the foreign matter 93 falling down to the first foreign matter guide 59 b. This can further suppress the foreign matter 93 entering the carrier tape conveyor 21 from freely moving inside the apparatus.

In the carrier tape transporting apparatus 21 according to the present embodiment, the foreign matter discharge hole 62h is disposed in the portion where the groove 59a is located. This can reliably discharge the foreign matter 93 that has entered the carrier tape conveyor 21.

The tape feeder 6 according to the present embodiment conveys the carrier tape 7 provided with the feed holes 7d at a predetermined pitch Pt1, and supplies the components 16 stored in the carrier tape 7 to the component supply position P1. The tape feeder 6 includes the carrier tape conveying device 21, and the carrier tape 7 is conveyed by the carrier tape conveying device 21 to supply the components 16 to the component supply position P1.

By providing the carrier tape conveying device 21 in the tape feeder 6, similarly, the occurrence of defects due to foreign substances can be reduced.

The present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, but various modifications and corrections will be apparent to those skilled in the art. Such variations and modifications are to be understood as being included therein without departing from the scope of the present disclosure as defined by the appended claims. Further, the combination of elements and the change of the order of the embodiments can be realized without departing from the scope and spirit of the present disclosure.

In the above embodiment, the structure in which the length Lp2 of the portion of the pin 28a hidden below the conveying surface 62g is longer than the length Lp1 of the portion of the pin 28a protruding from the conveying surface 62g in the second sprocket 28 has been described, but the present invention is not limited thereto. The first sprocket 26 and the third sprocket 30 may have the same structure as the second sprocket 28.

The present invention is not limited to the above-described embodiments, and various modifications may be employed.

Industrial applicability

The component conveying device of the present disclosure is applicable to a component conveying device that conveys a component toward a component supply position, and a tape feeder provided with the component conveying device.

Claims (7)

1. A carrier tape conveying device which conveys a carrier tape, the carrier tape accommodating member is provided with feed holes at a prescribed interval, wherein,

the carrier tape conveying device comprises:

a frame having a conveying surface for supporting and guiding the conveyed carrier tape from below; and

a sprocket having a plurality of pins protruding radially in correspondence with the pitch of the feed holes, the sprocket being configured to convey the carrier tape by rotating the pins while protruding upward from an opening formed in the conveying surface to engage the pins with the feed holes,

the length of the portion of the pin that is hidden below the conveying surface is long compared to the length of the portion of the pin that protrudes from the conveying surface.

2. The carrier tape transport apparatus according to claim 1, wherein,

the overall length of the pin is longer than the spacing of the root portions of adjacent pins, i.e., the inter-pin distance.

3. The carrier tape transport apparatus according to claim 1, wherein,

the lower part of the sprocket is provided with a foreign matter receiving part for receiving foreign matters falling along with the rotation of the sprocket, wherein the foreign matters enter from the opening part and remain on the surface of the sprocket clamped by the pin.

4. The carrier tape transport apparatus according to claim 3, wherein,

the foreign matter receiving portion includes a foreign matter guide portion for guiding the foreign matter to the discharge portion.

5. The carrier tape transport apparatus according to claim 4, wherein,

the foreign matter guide portion is provided with a portion recessed downward, and a groove is formed to collect the foreign matter falling down to the foreign matter guide portion.

6. The carrier tape transport apparatus of claim 5, wherein,

the discharge portion is disposed at a portion where the groove is located.

7. A tape feeder for feeding a carrier tape provided with feed holes at a predetermined pitch to a component feeding position by feeding components accommodated in the carrier tape,

the tape feeder is provided with the carrier tape transporting apparatus as claimed in any one of claims 1 to 6,

the component is supplied to the component supply position by the carrier tape being conveyed by the carrier tape conveying device.