feeder

Abstract

The feeder includes a first sprocket capable of engaging a first feed hole formed on one end side in a width direction of a tape in which components are housed, and a second sprocket capable of engaging a second feed hole formed on the other end side in the width direction of the tape. The tape is fed by both the first sprocket and the second sprocket and the components are supplied at a supply position. The second sprocket is provided with a phase difference of a predetermined angle of rotation with respect to the first sprocket.

Description

Technical Field

[0001] This specification discloses technology related to feeders. Background Technology

[0002] The carrier belt feeding mechanism described in Patent Document 1 includes sprockets, a shaft assembly, a motor, and a transmission gear mechanism. The sprockets include a left sprocket and a right sprocket, arranged with the axis of rotation extending in the left-right direction. Furthermore, the belt feeder described in Patent Document 1 uses a motor to rotate the shaft assembly, and the rotational force is transmitted to the sprockets via the left and right transmission gear mechanisms, causing the left and right sprockets to rotate synchronously in the same direction.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-161664 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] When a pair of sprockets located at both ends of the carrier belt in the width direction are used to feed the carrier belt, for example, the feeding accuracy of the carrier belt may be reduced due to the gap between the feed hole of the carrier belt and the teeth of the sprockets.

[0008] In view of this situation, this specification discloses a feeder that can suppress the decrease in the feed accuracy of the carrier belt.

[0009] Technical solutions for solving the problem

[0010] This specification discloses a feeder comprising: a first sprocket capable of engaging a first feed hole, the first feed hole being formed at one end of a carrier belt containing an element in the width direction; and a second sprocket capable of engaging a second feed hole, the second feed hole being formed at the other end of the carrier belt in the width direction. The carrier belt is fed at a supply position by conveying the element through both the first sprocket and the second sprocket, wherein the second sprocket is provided with a phase difference relative to the first sprocket by a predetermined rotation angle.

[0011] Furthermore, this specification discloses a technical concept in which the "feeder described in technical solution 1" is changed to "the feeder described in any one of technical solutions 1 to 5" in technical solution 6 described in the original technical solution (hereinafter referred to as the original technical solution). Additionally, this specification discloses a technical concept in which the "feeder described in technical solution 1" is changed to "the feeder described in any one of technical solutions 1 to 6" in technical solution 7 described in the original technical solution. Moreover, this specification discloses a technical concept in which the "feeder described in technical solution 1" is changed to "the feeder described in any one of technical solutions 1 to 7" in technical solution 8 described in the original technical solution.

[0012] Invention Effects

[0013] According to the above-mentioned feeder, by setting a phase difference between the first sprocket and the second sprocket, the decrease in the feed accuracy of the carrier belt can be suppressed. Attached Figure Description

[0014] Figure 1 This is a top view showing an example of the structure of a component mounting machine.

[0015] Figure 2 This is a front view showing an example of a feeder for a drive unit.

[0016] Figure 3 It is a magnified perspective view of the feeder near the drive unit.

[0017] Figure 4 It is a three-dimensional view showing a part of the drive unit.

[0018] Figure 5 This is a top view showing an example of a carrier tape.

[0019] Figure 6 This is a top view showing an example of the positional relationship between the feed hole and the teeth of the sprockets when no phase difference is set between the first and second sprockets.

[0020] Figure 7 This is a distribution diagram showing the distribution of the feed positions of the carrier tape.

[0021] Figure 8 This is a top view showing an example of the positional relationship between the feed hole and the teeth of the sprockets when a phase difference is provided between the first sprocket and the second sprocket. Detailed Implementation

[0022] 1. Implementation Method

[0023] 1-1. Structural Example of Component Mounting Machine 10

[0024] The feeder 40, loaded with carrier tape 80, can be used in the component mounting machine 10. The component mounting machine 10 mounts components 91 on a substrate 90. Figure 1 As shown, the component mounting machine 10 includes a substrate conveying device 11, a component supply device 12, a component transfer device 13, a component camera 14, a substrate camera 15, and a control device 16.

[0025] The substrate transport device 11, for example, is a belt conveyor, which transports the substrate 90 along the transport direction (X-axis direction). The substrate 90 is a circuit board, forming various circuits such as electronic circuits, electrical circuits, and magnetic circuits. The substrate transport device 11 moves the substrate 90 into the component mounting machine 10 and positions the substrate 90 at a predetermined position within the machine. After the component mounting machine 10 has completed the mounting process of multiple components 91, the substrate transport device 11 moves the substrate 90 out of the component mounting machine 10.

[0026] The component supply device 12 supplies components 91 that are mounted on the substrate 90. The component supply device 12 can have multiple components along the transport direction (X-axis direction) of the substrate 90. Figure 2 The feeder 40 is shown. Each feeder 40 is equipped with a reel. A carrier tape 80 containing components 91 is wound on the reel. The feeder 40 feeds the carrier tape 80 at intervals, supplying the components 91 in a pick-up manner at the supply position PP1 located at the front end of the feeder 40. Additionally, the component supply device 12 can also supply larger electronic components (e.g., leaded components, etc.) compared to chip components in a tray-like configuration.

[0027] The component transfer device 13 includes a head drive device 13a and a moving stage 13b. The head drive device 13a is configured to move the moving stage 13b along the X-axis and Y-axis directions (directions orthogonal to the X-axis in the horizontal plane) via a linear motion mechanism. A mounting head 20 is detachably (replaceable) mounted on the moving stage 13b via a clamping member. The mounting head 20 uses at least one holding member 30 to pick up and hold the component 91 supplied from the component supply device 12, and mounts the component 91 onto the substrate 90 positioned by the substrate transport device 11. The holding member 30 can be, for example, a nozzle, a chuck, or the like.

[0028] The component camera 14 and the substrate camera 15 can use known imaging devices. The component camera 14 is fixed to the base of the component mounting machine 10 with its optical axis pointing upwards in the vertical direction (the Z-axis direction, which is orthogonal to the X-axis and Y-axis directions). The component camera 14 can capture images of components such as the component 91 held in the holding member 30 from below. The substrate camera 15 is mounted on the moving stage 13b of the component transfer device 13 with its optical axis pointing downwards in the vertical direction (Z-axis direction). The substrate camera 15 can capture images of the substrate 90 transported by the substrate transport device 11 and the component 91 supplied by the component supply device 12 from above.

[0029] The component camera 14 and the substrate camera 15 capture images based on control signals sent from the control device 16. Image data from the images captured by the component camera 14 and the substrate camera 15 are sent to the control device 16. The control device 16 includes a known arithmetic unit and a storage unit, forming a control circuit. Information and image data output from various sensors installed on the component mounting machine 10 are input to the control device 16. The control device 16 sends control signals to each device based on a control program and pre-set predetermined mounting conditions.

[0030] For example, the control device 16 causes the substrate camera 15 to capture an image of the substrate 90 positioned by the substrate transport device 11. The control device 16 performs image processing on the image captured by the substrate camera 15 to identify the positioning state of the substrate 90. Additionally, the control device 16 causes the holding member 30 to pick up and hold a component 91 supplied from the component supply device 12, and causes the component camera 14 to capture an image of the component 91 held on the holding member 30. The control device 16 performs image processing on the image captured by the component camera 14 to identify the holding posture of the component 91.

[0031] The control device 16 moves the holding member 30 upward toward a predetermined mounting position set by a control program. Furthermore, the control device 16 corrects the predetermined mounting position and sets the actual mounting position of the component 91 based on the positioning state of the substrate 90 and the holding posture of the component 91. The predetermined mounting position and the actual mounting position include not only position (X-axis and Y-axis coordinates) but also rotation angle.

[0032] The control device 16 corrects the target position (X-axis and Y-axis coordinates) and rotation angle of the holding member 30 according to the installation position. At the corrected target position, the control device 16 lowers the holding member 30 by the corrected rotation angle to mount the element 91 onto the substrate 90. By repeatedly performing the above-described pick-and-place cycle, the control device 16 performs the mounting process of mounting multiple elements 91 onto the substrate 90.

[0033] 1-2. Structural examples of the feeder 40 and carrier belt 80

[0034] The feeder 40 supplies component 91 at the supply position PP1 in a pick-up manner. The feeder 40 only needs to supply component 91 at the supply position PP1, and various methods can be used. For example... Figures 2-4 As shown, the feeder 40 of the embodiment includes a feeder main body 41 and a drive device 50.

[0035] The feeder body 41 is formed in a flat, box-like shape and has a supply position PP1 for supplying components 91 to the component mounting machine 10. The supply position PP1 is formed on the front end side of the feeder body 41. Figure 2 The upper part (left side of the paper). In addition, the feeder body 41 can hold the reel with the carrier belt 80 wound on it so that it can be loaded and unloaded (replaceable). The reel is supported so that it can rotate relative to the feeder body 41.

[0036] like Figure 5 As shown, the carrier tape 80 includes a chamber 81, a first feed hole 82a, a second feed hole 82b, and a cover tape 83. The chamber 81 is formed to accommodate the component 91 and is formed at predetermined intervals along the length direction of the carrier tape 80, i.e., the conveying direction (arrow TC direction). The intervals of the chambers 81 are appropriately set according to the size of the accommodated component 91, etc.

[0037] The first feed hole 82a is a feed hole formed at one end of the carrier belt 80 in the width direction (arrow TW direction), and is formed at predetermined intervals along the conveying direction of the carrier belt 80 (arrow TC direction). Similarly, the second feed hole 82b is a feed hole formed at the other end of the carrier belt 80 in the width direction (arrow TW direction), and is formed at predetermined intervals along the conveying direction of the carrier belt 80 (arrow TC direction). The intervals of the first feed hole 82a and the second feed hole 82b are the same.

[0038] A cover tape 83 is adhered to the upper surface of the carrier tape 80, sealing the opening of the chamber 81. The cover tape 83 is peeled off from the portion of the carrier tape 80 that is being conveyed to the supply position PP1, such that the component mounting machine 10 can pick up the component 91. That is, the feeder 40 peels off the cover tape 83 while conveying the carrier tape 80, sequentially positioning the chambers 81 at the supply position PP1. Thus, the component 91 housed in the positioned chambers 81 can be picked up by the component mounting machine 10.

[0039] like Figures 2-4 As shown, the drive unit 50 includes a first sprocket 51, a second sprocket 52, a motor 53, a reduction gear 54, an intermediate gear 55, and a reduction gear 56. The first sprocket 51 can engage with the first feed hole 82a of the carrier belt 80, and the second sprocket 52 can engage with the second feed hole 82b of the carrier belt 80. The feeder 40 conveys the carrier belt 80 through both the first sprocket 51 and the second sprocket 52, and supplies the element 91 at the supply position PP1.

[0040] Specifically, the first sprocket 51 and the second sprocket 52 are rotatably supported on the feeder body 41. The first sprocket 51 includes a first tooth 51a, a sprocket gear 51b, and a fixing part 51c. The first tooth 51a is formed circumferentially on the outer periphery of the first sprocket 51 at intervals equal to the intervals provided in the first feed holes 82a of the carrier belt 80. The first tooth 51a engages sequentially with the first feed holes 82a to feed the carrier belt 80 at intervals.

[0041] Similarly, the second sprocket 52 includes a second tooth 52a. The second tooth 52a is formed circumferentially on the outer periphery of the second sprocket 52 at intervals equal to the intervals between the second feed holes 82b provided on the carrier belt 80. Furthermore, the first sprocket 51 is connected to the sprocket gear 51b via a fixing part 51c, and the second sprocket 52 is connected to both the sprocket gear 51b and the first sprocket 51 via a shaft 50s. Therefore, the second sprocket 52 rotates as the first sprocket 51 is driven. Consequently, the second tooth 52a engages sequentially with the second feed holes 82b to feed the carrier belt 80 at intervals.

[0042] The motor 53 rotates the first sprocket 51. The motor 53 can be used in various ways as long as it can rotate the first sprocket 51 to transport the carrier belt 80 through both the first sprocket 51 and the second sprocket 52, and to position the component 91 housed in the chamber 81 at the supply position PP1. For example, the motor 53 can be a known stepper motor, servo motor, etc.

[0043] The electric motor 53 includes a drive gear 53a. When the rotating shaft of the electric motor 53 rotates, the reduction gear 54, which meshes with the drive gear 53a disposed on the rotating shaft, rotates. The driving force of the electric motor 53 is transmitted to the first sprocket 51 via an intermediate gear 55 that meshes with the reduction gear 54. The intermediate gear 55 meshes with a sprocket gear 51b disposed on the first sprocket 51, and the first sprocket 51 rotates as the intermediate gear 55 rotates.

[0044] Furthermore, the drive gear 53a also meshes with the reduction gear 56. Therefore, the driving force of the motor 53 can be transmitted to other mechanisms via the reduction gear 56. For example, the driving force of the motor 53 can be transmitted to the winding mechanism that winds the cover tape 83 stripped from the carrier tape 80.

[0045] 1-3. Phase difference between the first sprocket 51 and the second sprocket 52

[0046] Figure 6This figure illustrates an example of the positional relationship between the feed holes and the teeth of the sprockets when no phase difference is established between the first sprocket 51 and the second sprocket 52. The figure is a top view taken vertically above a set of first feed holes 82a and second feed holes 82b located in the width direction (arrow TW direction) of the carrier belt 80. The first tooth 51a of the first sprocket 51 engages with the first feed hole 82a, and the second tooth 52a of the second sprocket 52 engages with the second feed hole 82b.

[0047] For example, in this figure, the first feed hole 82a is a circular hole, and the second feed hole 82b is an elongated hole. Therefore, as shown in the figure, a gap GP0 is more likely to occur between the second feed hole 82b and the second tooth 52a of the second sprocket 52 compared to the gap between the first feed hole 82a and the first tooth 51a of the first sprocket 51. When a gap GP0 occurs, the feed accuracy of the carrier belt may be reduced.

[0048] Figure 7 This figure shows an example of the distribution of the feed positions of carrier belt 80. The horizontal axis of the figure represents the positional offset of carrier belt 80 in the width direction (arrow TW direction), and the vertical axis represents the positional offset of carrier belt 80 in the conveying direction (arrow TC direction). Region AR0 represents an example of the allowable range of positional offset, region AR1 represents an example of the target range of positional offset, and region AR2 represents... Figure 6 The above describes an example of the distribution of the feed position of the carrier belt 80 when the feed position of the carrier belt 80 is measured while the carrier belt 80 is being fed at the pitch.

[0049] Specifically, such as Figure 5 and Figure 6 As shown, at predetermined positions on the carrier tape 80 (e.g., the portion located on the side of the travel direction (arrow TC1 direction) of the carrier tape 80 relative to the second feed hole 82b in the transport direction (arrow TC direction) of the carrier tape 80), markers MK0 are marked at intervals according to the pitch feed. For example, the control device 16 of the component mounting machine 10 sequentially photographs the markers MK0 using the substrate camera 15 while the carrier tape 80 is pitch-fed. Then, the control device 16 performs image processing on the images photographed by the substrate camera 15 and determines the position of each marker MK0. The region AR2 can be obtained by plotting the positional offset of the measured position of the marker MK0 relative to the target feed position. Figure 7 As shown, region AR2 sometimes cannot be contained within region AR0. Figure 7 This shows that the feed accuracy of the carrier tape may be reduced due to the aforementioned gap GP0.

[0050] exist Figure 6In the arrangement shown, the first tooth 51a of the first sprocket 51 and the second tooth 52a of the second sprocket 52, which together with the first tooth 51a transports the carrier belt 80, are located along the width direction of the carrier belt 80 (arrow TW direction) (refer to the straight line of the dashed line). That is, the first sprocket 51 and the second sprocket 52 rotate at the same angle, and no phase difference is set between the first sprocket 51 and the second sprocket 52. Therefore, in Figure 6 In the manner shown, it is difficult to reduce the aforementioned gap GP0.

[0051] In the feeder 40 of the embodiment, the second sprocket 52 is provided with a phase difference relative to the first sprocket 51, which has been rotated by a predetermined angle. By providing a phase difference between the first sprocket 51 and the second sprocket 52, the aforementioned gap GP0 can be easily reduced, and the decrease in the feeding accuracy of the carrier belt 80 can be suppressed. Specifically, in the example above, the first feed hole 82a is a circular hole, and the second feed hole 82b is an elongated hole. Thus, the second feed hole 82b is set such that, compared to the case where the first sprocket 51 engages with the first feed hole 82a, the second sprocket 52 engages with the second feed hole 82b with a larger margin.

[0052] In this case, by forming a state in which the second tooth 52a of the second sprocket 52 applies pressure in the conveying direction (arrow TC direction) to the carrier belt 80, it is easy to reduce Figure 6 The gap GP0 between the second feed hole 82b and the second tooth 52a of the second sprocket 52 is shown. Furthermore, if the phase difference is too large, the second sprocket 52 cannot engage with the second feed hole 82b. Therefore, the phase difference can be an angle within a range that allows the second sprocket 52 to engage with the second feed hole 82b when a pressing force in the conveying direction (arrow TC direction) is applied to the carrier belt 80 to suppress the reduction in feed accuracy of the carrier belt 80 caused by the excess material in the second feed hole 82b.

[0053] Figure 8 This figure illustrates an example of the positional relationship between the feed hole and the teeth of the sprockets when there is a phase difference between the first sprocket 51 and the second sprocket 52. Figure 6 The same illustration is provided, but for easier understanding of the rotation of carrier tape 80, a portion of carrier tape 80 is shown. Figure 8 In the manner shown, the second tooth 52a of the second sprocket 52 is offset relative to the first tooth 51a of the first sprocket 51 that conveys the carrier belt 80 together with the second tooth 52a in the conveying direction of the carrier belt 80 (arrow TC direction) (refer to the two straight lines and arrow of the dashed line).

[0054] That is, the second sprocket 52 rotates relative to the first sprocket 51, with a phase difference. Additionally, in Figure 8In the manner shown, a positional shift occurs in the travel direction (arrow TC1) of the carrier belt 80 in the conveying direction (arrow TC direction). Consequently, a pressing force is applied to the carrier belt 80 via the second tooth 52a of the second sprocket 52, acting in the travel direction (arrow TC1) of the conveying direction (arrow TC direction). Figure 6 The gap GP0 between the second feed hole 82b and the second tooth 52a of the second sprocket 52 is reduced.

[0055] Furthermore, the second feed hole 82b is configured to have a larger clearance than when the first sprocket 51 engages with the first feed hole 82a, and the shapes of the first feed hole 82a and the second feed hole 82b are not limited. In this embodiment, the first feed hole 82a is a circular hole, and the second feed hole 82b is an elongated hole. Similarly, the elongated hole can take various shapes. For example, the elongated hole can also be formed into a raceway shape having a straight portion extending in the width direction (arrow TW direction) of the carrier belt 80 and arc-shaped arc portions provided at both ends of the straight portion.

[0056] In this embodiment, the elongated holes are formed in an elliptical shape with their major axis set along the width direction (arrow TW direction) of the carrier belt 80. These elongated holes have the aforementioned allowance in the width direction (arrow TW direction) of the carrier belt 80. Therefore, no phase difference is provided between the first sprocket 51 and the second sprocket 52. Figure 6 In the manner shown, such as Figure 7 As shown in region AR2, the positional offset of the carrier tape 80 in the width direction (arrow TW direction) is prone to increase.

[0057] Therefore, as Figure 8 As shown, the phase difference can be the angle at which the second sprocket 52 can engage with the outer end 82b1 side of the second feed hole 82b in the width direction (arrow TW direction). In this case, the pressing force applied to the carrier belt 80 by the second tooth 52a of the second sprocket 52 has a width direction component that presses the carrier belt 80 in the width direction (arrow TW direction) and a conveying direction component that presses the carrier belt 80 in the conveying direction (arrow TC direction). Therefore, the carrier belt 80 can easily rotate around the first feed hole 82a with a relatively small margin, and the positional offset of the carrier belt 80 in the width direction (arrow TW direction) can be easily reduced by the width direction component of the pressing force.

[0058] Figure 7 Region AR3 shown is similar to region AR2 shown in the figure, indicating that in Figure 8The method shown illustrates an example of the distribution of the feed position of the carrier belt 80 when the feed position of the carrier belt 80 is measured. By rotating the carrier belt 80 as described above, the positional offset in region AR3, particularly in the width direction (arrow TW direction), is reduced compared to region AR2. Furthermore, region AR3 falls within region AR0, an example representing the allowable range of positional offset. Also, region AR3 falls within region AR1, an example representing the target range of positional offset.

[0059] Thus, the phase difference can be an angle within the allowable range for the feed accuracy of both the width direction (arrow TW direction) and the conveying direction (arrow TC direction) of the carrier belt 80. As described above, Figure 7 Regions AR2 and AR3 shown can be obtained, for example, using an actual machine. The operator can, for example, prepare a feeder 40 that increases or decreases the rotation angle of the second sprocket 52 relative to the first sprocket 51, to obtain... Figure 7 The distribution of the feed positions of the carrier belt 80, as shown, results in a rotation angle within region AR0. Furthermore, regions AR0 and AR1 can be arbitrarily set, for example, based on the required feed accuracy.

[0060] In addition, such as Figure 8 As shown, the second sprocket 52 can rotate relative to the first sprocket 51 in the traveling direction (arrow TC1 direction) of the carrier belt 80. Therefore, the second tooth 52a of the second sprocket 52 can easily apply a pressing force to the carrier belt 80 in the traveling direction (arrow TC1 direction) of the conveying direction (arrow TC direction). Furthermore, the second sprocket 52 can also rotate relative to the first sprocket 51 in the reversing direction (arrow TC2 direction) of the carrier belt 80.

[0061] In addition, such as Figure 8 As shown, when the carrier belt 80 is rotated by the same angle around the first feed hole 82a (which is a circular hole), the longer the distance between the first sprocket 51 and the second sprocket 52, the greater the need to increase the phase difference (the rotation angle of the second sprocket 52 relative to the first sprocket 51). Therefore, the longer the distance between the first sprocket 51 and the second sprocket 52, the larger the phase difference can be set. Thus, the feeder 40 can rotate carrier belts 80 with different dimensions in the width direction (arrow TW direction) at the same angle, and can transport the carrier belt 80 in the same engagement state.

[0062] like Figures 2-4 As shown, the first sprocket 51 is a reference-side sprocket driven by the motor 53, and the second sprocket 52 is a driven-side sprocket that rotates in response to the drive of the first sprocket 51. Specifically, as... Figure 2 As shown, the first sprocket 51 is connected to the motor 53 via sprocket gear 51b and reduction gear 54. Additionally, as... Figure 4As shown, the second sprocket 52 is connected to the sprocket gear 51b and the first sprocket 51 via the shaft 50s. Thus, the second sprocket 52 can rotate as driven by the first sprocket 51.

[0063] Furthermore, the first sprocket 51 rotates relative to the sprocket gear 51b, which is in phase with the second sprocket 52. Specifically, as... Figure 4 As shown, the first sprocket 51 and the sprocket gear 51b are fixed by a plurality of (four in this figure) fixing parts 51c. The fixing parts 51c can be, for example, bolts. The first sprocket 51 has an elongated hole extending circumferentially at the location where it is fixed by the fixing parts 51c, allowing the rotation angle of the first sprocket 51 relative to the sprocket gear 51b to be adjusted. Thus, the first sprocket 51 can rotate relative to the sprocket gear 51b, which is in phase with the second sprocket 52. In other words, the second sprocket 52 can rotate relative to the first sprocket 51, enabling the aforementioned phase difference to be set.

[0064] In this embodiment, the second feed hole 82b is configured such that, compared to the case where the first sprocket 51 engages with the first feed hole 82a, the second sprocket 52 engages with the second feed hole 82b with a larger allowance. Furthermore, the second sprocket 52 is a driven sprocket that rotates with the drive of the first sprocket 51. Therefore, the rotation accompanying the transport of the carrier belt 80 is facilitated. Additionally, the first sprocket 51, driven by the motor 53, engages with the first feed hole 82a, which has a smaller allowance compared to the second feed hole 82b. Therefore, the carrier belt 80 can be reliably fed with spacing.

[0065] Furthermore, the items described in this specification can be appropriately modified and applied, and can be selected and applied selectively. Additionally, the items described in this specification can be appropriately combined. For example, the second feed hole 82b can be configured such that, compared to the case where the first sprocket 51 engages with the first feed hole 82a, the allowance when the second sprocket 52 engages with the second feed hole 82b is smaller. For example, the first feed hole 82a can be an elongated hole, and the second feed hole 82b can be a circular hole. Alternatively, the first sprocket 51 can be a driven sprocket, and the second sprocket 52 can be a reference sprocket.

[0066] 2. An example of the effect of the implementation method

[0067] According to the feeder 40, by setting a phase difference between the first sprocket 51 and the second sprocket 52, the decrease in the feed accuracy of the carrier belt 80 can be suppressed.

[0068] Explanation of reference numerals in the attached figures

[0069] 40: Feeder; 50s: Shaft; 51: First sprocket; 51b: Sprocket gear; 52: Second sprocket; 53: Electric motor; 54: Reduction gear; 80: Carrier belt; 82a: First feed hole; 82b: Second feed hole; 82b1: Outer end; 91: Component; PP1: Supply location; Arrow TC direction: Conveying direction. Arrow TC1 direction: direction of travel; Arrow TW direction: width direction.

Claims

1. A feeder, comprising: A first sprocket is capable of engaging with a first feed hole, the first feed hole being formed at one end of the carrier belt containing the component in the width direction; and The second sprocket can engage with the second feed hole, which is a feed hole formed on the other end side of the carrier belt in the width direction. The component is supplied at the supply position by conveying the carrier belt through both the first sprocket and the second sprocket, wherein... The second sprocket has a phase difference relative to the first sprocket, which has been rotated by a predetermined angle.

2. The feeder according to claim 1, wherein, The second feed hole is configured such that, compared to the case where the first sprocket engages with the first feed hole, the second sprocket engages with the second feed hole with a larger allowance. The phase difference is an angle within a range that the second sprocket can engage with the second feed hole when a pressing force in the conveying direction is applied to the carrier belt to suppress the decrease in the feed accuracy of the carrier belt caused by the allowance of the second feed hole.

3. The feeder according to claim 2, wherein, The first feed hole is a round hole. The second feed hole is an elongated hole.

4. The feeder according to claim 3, wherein, The elongated hole is formed in an ellipse with its major axis set along the width direction of the carrier tape. The phase difference is the angle at which the second sprocket can engage with the outer end of the second feed hole in the width direction.

5. The feeder according to any one of claims 1 to 4, wherein, The phase difference is the angle within the allowable range of the feed accuracy in the width direction and the conveying direction of the carrier belt.

6. The feeder according to claim 1, wherein, The second sprocket rotates relative to the first sprocket in the direction of travel of the carrier belt.

7. The feeder according to claim 1, wherein, The longer the distance between the first sprocket and the second sprocket, the greater the phase difference is set.

8. The feeder according to claim 1, wherein, The first sprocket is a reference-side sprocket driven by an electric motor. The second sprocket is a driven sprocket that rotates as driven by the first sprocket.

9. The feeder according to claim 8, wherein, The first sprocket is connected to the electric motor via a sprocket gear and a reduction gear. The second sprocket is connected to the sprocket gear and the first sprocket via a shaft.

10. The feeder according to claim 9, wherein, The first sprocket rotates relative to the sprocket gear that is in phase with the second sprocket.

Images