JP7770239B2 - Reel holder and tape feeder - Google Patents

Description

This disclosure relates to a reel holder and a tape feeder.

Patent Documents 1 and 2 listed below disclose technology that makes it possible to change the position of a reel holding section (reel attachment section) that holds a reel on which component supply tape is wound, in the vertical direction.

Japanese Patent Application Laid-Open No. 2004-047951 JP 2013-149776 A

The objective of the present invention is to provide a reel holder whose reel attachment portion can be easily moved up and down.

The reel holder comprises a reel mounting portion that is movably attached along the guide rail of the tape feeder between upper and lower positions set on the guide rail, a first restricting portion that restricts the vertical movement of the reel mounting portion relative to the guide rail, and a second restricting portion that restricts the rotation of the reel mounting portion relative to the guide rail.

When the reel attachment portion rotates clockwise relative to the guide rail up to a first angle in the upper position, the second restriction portion restricts further rotation, while the first restriction portion restricts movement of the reel attachment portion to the lower position.

When the reel attachment portion rotates counterclockwise from the first angle to the second angle in the upper position, the second restricting portion restricts further rotation, while the first restricting portion releases the restriction on up and down movement, allowing movement from the upper position to the lower position.

With this configuration, when the reel attachment part is rotated counterclockwise in the upper position, the second restriction part stops the rotation when it reaches the second angle. Because the operator does not need to fine-tune the angle of the reel attachment part to the second angle at which vertical movement is permitted, vertical movement can be easily performed without having to consider the rotation angle of the reel attachment part.

Furthermore, with this configuration, when the reel attachment part is rotated clockwise in the upper position, the first restricting part stops the rotation when it reaches a first angle. The first angle is the angle at which the up and down movement of the reel attachment part is restricted. This allows the reel attachment part to be held in the upper position, preventing unintended up and down movement of the reel attachment part.

According to the present invention, the reel attachment portion can be easily moved up and down.

Plan view of component mounting equipment Side view of the tape feeder Exploded perspective view of the reel holder FIG. 10 is a perspective view showing a state in which the lock lever is in a locked position. FIG. 10 is a perspective view showing a state in which the lock lever is in the unlocked position. 1 is a side view of the reel holder at the first angle in the upper position; A partial enlarged view of FIG. Side view showing the lock lever in the unlocked position A side view of the reel holder when it is at the second angle in the upper position. A partial enlarged view of FIG. Side view of the reel holder moving between the upper and lower positions A partial enlarged view of FIG. A side view of the reel holder when it is at the second angle in the lower position. A partial enlarged view of FIG. 1 is a side view of the reel holder at the first angle in the lower position; A partial enlarged view of FIG. 10 is a partial side view of a reel holder according to a second embodiment.

<Embodiment 1>
A reel holder 50 according to a first embodiment of the present disclosure will be described with reference to Figures 1 to 10B. Note that the present disclosure is not limited to the following examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. As shown in Figure 1, the first embodiment illustrates a tape feeder 40 and a reel holder 50 (see Figure 2) included in the tape feeder 40 that are applied to a component mounting apparatus 10 that mounts components E, such as electronic components, on a substrate P, such as a printed circuit board.

1. Structure Description 1.1 Overall Configuration of Component Mounting Apparatus 10 The overall configuration of the component mounting apparatus 10 will be described with reference to FIG.

As shown in FIG. 1, the component mounting device 10 comprises a base 11, a transport conveyor 14 that transports the substrate P, a head unit 30, and a transport section 20 that moves the head unit 30 on the base 11. In the following description, the longitudinal direction of the base 11 (the left-right direction in FIG. 1) is referred to as the left-right direction, the depth direction of the base 11 (the up-down direction in FIG. 1) is referred to as the front-to-back direction, and the direction perpendicular to the plane of the paper in FIG. 1 is referred to as the up-down direction. In each figure, the positive direction of the X axis indicates the right, the positive direction of the Y axis indicates the rear, and the positive direction of the Z axis indicates the upward direction.

The transport conveyor 14 is located in the center of the base 11. The transport conveyor 14 is equipped with a pair of transport belts 15 that rotate left and right, and transports the board P on the transport belts 15 to the right due to friction with the transport belts 15. In this embodiment, the board P is carried into the component mounting device 10 from the left side via the transport conveyor 14. The carried-in board P is transported by the transport conveyor 14 to a working position in the center of the base 11, where it stops.

Four component supply devices 12 are arranged on the base 11, surrounding the work position. Each component supply device 12 has multiple tape feeders 40 attached to it, aligned horizontally. The tape feeders 40 supply components E held by the component tape 51 (see Figure 2) to the component supply position 17 by intermittently feeding out component tape 51 from a reel 52. The tape feeders 40 will be described in detail later. In this embodiment, the tape feeders 40 are supported on a carriage 16 so that they can be inserted or removed, and are attached to the base 11 via the carriage 16.

The transport unit 20 transports the head unit 30 in the X-axis and Y-axis directions within a predetermined range of movement. As shown in FIG. 1, the transport unit 20 includes an X-axis beam 21, a Y-axis frame 22, an X-axis servo motor 23, and a Y-axis servo motor 24. The head unit 30 is supported by the X-axis beam 21 and can be moved back and forth in the X-axis direction by the X-axis servo motor 23. The X-axis beam 21 is supported by the Y-axis frame 22 and can be moved back and forth in the Y-axis direction by the Y-axis servo motor 24.

The head unit 30 has a box-shaped head unit main body 31, multiple (five in this embodiment) mounting heads 32 that perform the mounting operation of components E, and a board imaging camera 28.

The mounting head 32 protrudes downward from the head unit main body 31. Negative pressure is supplied to the mounting head 32 from an air supply device (not shown), generating suction force in the nozzle at the bottom end. By switching the negative pressure ON and OFF, the mounting head 32 picks up and releases the component E.

A board imaging camera 28 is arranged in the head unit 30 with its imaging surface facing downward. The board imaging camera 28 captures an image of a fiducial mark (not shown) on the board P to recognize the position and orientation of the board P.

A component imaging camera 29 is placed on the base 11 with its imaging surface facing upward. The component imaging camera 29 captures an image of the component E picked up by the mounting head 32 from below.

The component mounting device 10 mounts the component E on the substrate P by the mounting head 32 picking up the component E at the component supply position 17 and releasing the component E at a predetermined position on the substrate P. The substrate P on which the component E has been mounted is then transported to the right by the transport conveyor 14 and taken out of the component mounting device 10.

2, the tape feeder 40 is formed long in the Y-axis direction, and is attached to the component supply device 12 by moving it in parallel in the Y-axis direction. In the following, the direction of travel of the tape feeder 40 when the tape feeder 40 is attached to the component supply device 12 (the left side in FIG. 2) will be referred to as the front of the tape feeder 40, and the side opposite to the front will be referred to as the rear of the tape feeder 40.

The tape feeder 40 has a feeder main body 41 that feeds the component tape 51 forward, and a reel holder 50 to which a reel 52 around which the component tape 51 is wound is attached.

The feeder main body 41 includes a main body 42, a sprocket 43, a rear extension 44, and a guide rail 45. A tape insertion opening 42a is formed at the rear of the main body 42, through which the component tape 51 is inserted from the rear. A tape passage 42b extending in the front-to-rear direction is formed inside the main body 42. The component tape 51 is inserted into the tape insertion opening 42a from the reel 52 via the tape guide 57, and is fed forward through the tape passage 42b.

The sprocket 43 is mounted inside the main body 42 and is driven to rotate by a motor (not shown). Teeth are formed on the outer periphery of the sprocket 43 to engage with engagement holes in the component tape 51. By rotating the sprocket 43 with the teeth of the sprocket 43 engaged with the engagement holes, the component tape 51 is fed to the component supply position 17 located at the front end of the tape feeder 40.

A rearward extension 44 is attached to the lower rear end of the main body 42, extending horizontally rearward. A guide rail 45 is attached to the rear end of the rearward extension 44, extending downward. The guide rail 45 is a roughly rectangular plate whose surface is parallel to the YZ plane, and a guide hole 45a is formed through the plate surface.

The guide hole 45a is an ellipse with its longitudinal direction extending vertically. A recess 46 is formed in the plate surface of the guide rail 45, recessed from the plate surface of the guide rail 45 in the X-axis direction. The recess 46 is formed to surround the opening of the guide hole 45a when viewed from the X-axis direction (see Figure 3). The periphery of the recess 46 has two parallel straight portions 46a extending vertically, an upper arc portion 46b connected to the upper end of the straight portions 46a, and a lower arc portion 46c connected to the lower end (see Figure 8A).

2, the reel holder 50 has a reel attachment portion 53 and a locking mechanism 60. The reel attachment portion 53 has a cover plate 61 parallel to the YZ plane, and a reel attachment shaft 56 fixed to the cover plate 61 and extending in the X-axis direction. The reel 52 is rotatably attached to the reel attachment portion 53 by inserting the reel attachment shaft 56 into a through-hole provided in the center of the reel 52.

As shown in FIG. 3, the locking mechanism 60 includes a cover plate 62, a shaft (an example of a first restricting portion) 63, a stopper (an example of a second restricting portion) 64, a locking lever 65, and a lever shaft 66.

The cover plate 62 is a plate-shaped member parallel to the YZ plane. The shaft 63, stopper 64, lever shaft 66, and other components are fixed between the cover plates 61 and 62. The rear side of the cover plate 61 is the reel attachment part 53, and the locking mechanism 60 and reel attachment part 53 rotate together around the shaft (described below).

As shown in Figures 3 and 6B, the shaft 63 has a circular plate shape with two notches cut out, and has two arcuate portions 63a and two parallel chord portions 63b. The chord portions 63b are flat portions provided on the outer circumferential surface of the shaft 63 and are an example of a D-cut surface. The distances from the center 63c of the disk to the two chord portions 63b are equal.

The shaft 63 is fitted into the recess 46. Figure 6B shows the state in which the shaft 63 is supported by the upper circular arc portion 46b of the recess 46. The shaft 63 abuts against the inner wall of the upper circular arc portion 46b and is rotatable inside the upper circular arc portion 46b. Similarly, when the shaft 63 is supported by the lower circular arc portion 46c, it is rotatable inside the lower circular arc portion 46c (see Figure 10B). The center of rotation of the shaft 63 is the center 63c of the original disc.

The position of the reel attachment portion 53 when the shaft 63 is supported by the upper end arc portion 46b is referred to as the upper position, and the position of the reel attachment portion 53 when the shaft 63 is supported by the lower end arc portion 46c is referred to as the lower position.

Figure 6A shows the case where the angle formed between the long side 45b of the guide rail 45 and the upper side 53a of the reel attachment portion 53 is a first angle θ1. Figure 6B is a partial enlarged view of Figure 6A. In the following description, "the case where the angle formed between the long side 45b of the guide rail 45 and the upper side 53a of the reel attachment portion 53 is angle θ" will be expressed as "the case where the reel attachment portion 53 is at angle θ." Furthermore, in partial enlarged views such as Figure 6B, the cover plate 62 that covers the locking mechanism 60 is not shown in the drawing in order to explain the locking mechanism 60.

As shown in Figures 6A and 6B, when the reel attachment portion 53 is at the first angle θ1, the chord portion 63b of the shaft 63 is not aligned with the straight portion 46a of the recess 46. In this case, the shaft 63 cannot move downward from the upper end arc portion 46b, and its movement in the vertical direction is restricted.

Figures 7A and 7B show the state when the reel mounting portion 53 is rotated counterclockwise relative to the guide rail 45 from the state shown in Figures 6A and 6B, so that the chord portion 63b of the shaft 63 and the straight portion 46a of the recess 46 are parallel. The angle of the reel mounting portion 53 at this time is defined as the second angle θ2. When the reel mounting portion 53 is at the second angle θ2, the shaft 63 and the recess 46 are aligned, allowing the reel mounting portion 53 to move downward.

As explained above, when the angle of the reel attachment portion 53 is the second angle θ2, the shaft 63 allows the reel attachment portion 53 to move from the upper position to the lower position, and when the angle is the first angle θ1, the shaft 63 restricts the reel attachment portion 53 from moving from the upper position to the lower position.

As shown in Figure 3, the stopper 64 is a columnar (cylindrical) pin with its axis in the X-axis direction. It is fixed between the cover plates 61 and 62 and rotates integrally with the reel attachment part 53. The stopper 64 abuts against the long side part 45b of the guide rail 45, thereby restricting the rotation of the reel attachment part 53 around the shaft 63.

The cover plate 62 is a plate-shaped member that is elongated in the front-to-rear direction. The cover plate 62 has a rotation restriction portion 62a at its upper end that extends in the X-axis direction (toward the cover plate 61).

The lock lever 65 is a plate-shaped member with a plate surface parallel to the YZ plane. The lever shaft 66 passes through the lock lever 65 in the X-axis direction. The lock lever 65 can rotate around the lever shaft 66 between the locked position shown in Figure 4 and the unlocked position shown in Figure 5.

The locked position is the position when the lock lever 65 is rotated counterclockwise until it abuts the guide rail 45. As shown in Figure 6B, when the lock lever 65 is in the locked position, even if an attempt is made to rotate the reel attachment portion 53 counterclockwise beyond the first angle θ1, the lock lever 65 abuts against the long side portion 45b, preventing the reel attachment portion 53 from rotating counterclockwise beyond the first angle θ1.

The unlocked position is the position when the lock lever 65 rotates clockwise until it abuts the rotation restriction portion 62a. As shown in Figure 6C, when the lock lever 65 is in the unlocked position, the restriction on rotation by the lock lever 65 is released, and the reel attachment portion 53 can be rotated counterclockwise.

The center of gravity of the lock lever 65 is designated as center of gravity 65b, and its position is shown in Figure 6C. Figure 6C shows a state in which the angle of the reel attachment portion 53 is the first angle θ1 and the lock lever 65 is in the unlocked position. At this time, the center of gravity 65b is located above and rearward (to the right in the figure) of the center 66a of the lever shaft 66, which is the center of rotation, and a clockwise moment is generated by the weight of the lock lever 65. The lock lever 65 abuts against the rotation restriction portion 62a and is stationary in the unlocked position.

Figure 7B shows the state after the reel attachment portion 53 has been rotated counterclockwise from the first angle θ1 to the second angle θ2 from the state shown in Figure 6C. As the reel attachment portion 53 rotates, the lock lever 65 and lever shaft 66 rotate integrally around the shaft 63. This rotation changes the relative positional relationship between the center of gravity 65b and the lever shaft 66 in the front-to-rear direction, with the center of gravity 65b now positioned above and forward (to the left in the figure) of the center 66a. This generates a counterclockwise moment due to the weight of the lock lever 65. The lock lever 65 is leaning against the long side 45b.

If, from the state shown in Figure 7B, the reel attachment portion 53 is rotated clockwise to change the reel attachment portion 53 from the second angle θ2 to the first angle θ1, the counterclockwise moment generated in the lock lever 65 will cause the lock lever 65 to rotate counterclockwise to the locked position (see Figure 6B).

2. Description of Operation The operation of the reel holder 50 of this embodiment will be described below. The following steps (1) to (5) divide the series of operations from moving the reel attachment part 53, which is fixed in the upper position, to the lower position and fixing it there. The movement of the reel attachment part 53 is performed by the operator of the component mounting device 10. Figures 6A to 10B are overall views and partial enlarged views of the reel holder 50 and guide rail 45 at each of steps (1) to (5).

(1) Figures 6A and 6B show the state in which the reel attachment portion 53 is in the upper position and the angle of the reel attachment portion 53 is the first angle θ1.

The weight of the reel attachment portion 53 generates a clockwise moment on the reel attachment portion 53. The stopper 64 abuts against the guide rail 45 below the center 63c of the shaft 63, restricting clockwise rotation beyond the first angle θ1.

The lock lever 65 is in the locked position and abuts against the guide rail 45. When in the locked position, the lock lever 65 restricts counterclockwise rotation of the reel attachment portion 53.

In other words, the stopper 64 and lock lever 65 restrict rotation of the reel mounting portion 53 in both directions, and the reel mounting portion 53 is constrained to the first angle θ1. When the reel mounting portion 53 is at the first angle θ1, the shaft 63 and the recess 46 are not aligned, so the shaft 63 cannot move downward, and movement of the reel mounting portion 53 to the lower position is restricted. Therefore, in the state shown in Figures 6A and 6B, the reel mounting portion 53 is fixed in the upper position.

(2) As shown in Figure 6C, the position of the lock lever 65 is changed from the locked position to the unlocked position. This releases the restriction on counterclockwise rotation of the reel attachment portion 53. Figures 7A and 7B show the state in which the reel attachment portion 53 has been rotated counterclockwise. As shown in Figure 7B, the stopper 64, which was in contact with the guide rail 45 in the state (1) above, temporarily moves away from the guide rail 45, then moves along an arcuate trajectory and again contacts the guide rail 45. The angle of the reel attachment portion 53 at this time is the second angle θ2. When the stopper 64 hits the guide rail 45 above the center 63c of the shaft 63, counterclockwise rotation exceeding the second angle θ2 is restricted.

When the reel attachment portion 53 reaches the second angle θ2, the shaft 63 and the recess 46 are aligned, allowing the shaft 63 to move downward. In other words, the restriction on movement of the reel attachment portion 53 to the lower position is lifted.

(3) As shown in Figures 8A and 8B, the released reel attachment portion 53 is moved downward in parallel along the guide rail 45 while maintaining the second angle θ2. During movement from the upper position to the lower position, the stopper 64 slides against the long side portion 45b of the guide rail 45.

(4) As shown in Figures 9A and 9B, when the reel attachment portion 53 reaches the lower position, the shaft 63 enters the lower end arc portion 46c of the recess 46 and is rotatably supported.

(5) As shown in Figures 10A and 10B, rotate the reel mounting portion 53 clockwise. When the reel mounting portion 53 reaches the first angle θ1, the stopper 64 abuts against the guide rail 45, restricting further rotation of the reel mounting portion 53. At the same time, the shaft 63 and the recess 46 are no longer aligned, restricting movement of the reel mounting portion 53 to the upper position.

Furthermore, as the reel attachment portion 53 is changed from the second angle θ2 (see FIG. 9B) to the first angle θ1 (see FIG. 10B), the lock lever 65 rotates counterclockwise from the unlocked position to the locked position due to its own weight. When the lock lever 65 is in the locked position, counterclockwise rotation of the reel attachment portion 53 in the lower position is restricted.

Clockwise rotation of the reel mounting portion 53 is restricted by a stopper 64 that abuts against the guide rail 45, and counterclockwise rotation is restricted by a lock lever 65 that abuts against the guide rail 45. As a result, the angle of the reel mounting portion 53 is constrained to the first angle θ1, and the reel mounting portion 53 is fixed in the lower position.

Moving the reel attachment portion 53 from the lower position to the upper position can be done using the same operations as (1) to (5) above, except that the direction of up-down movement is reversed.

3. Description of Effects With this configuration, when the reel mounting part 53 is rotated counterclockwise in the upper or lower position, the stopper 64 abuts against the guide rail 45 when the second angle θ2 is reached, and the rotation stops. Because the operator does not need to fine-tune the angle of the reel mounting part 53 so that it is at the second angle θ2 at which vertical movement is permitted, vertical movement can be easily performed without being aware of the rotation angle of the reel mounting part 53.

In this configuration, when the reel attachment portion 53 is rotated clockwise in the upper or lower position, the stopper 64 abuts against the guide rail 45 at the first angle θ1, stopping the rotation. The first angle θ1 is the angle at which the up and down movement of the reel attachment portion 53 is restricted. This allows the reel attachment portion 53 to be held in the upper or lower position, preventing unintentional up and down movement of the reel attachment portion 53.

In this configuration, when the reel attachment portion 53 is at the first angle θ1, the lock lever 65 in the locked position restricts counterclockwise rotation. This prevents the reel holder 50 from being pulled up (rotating counterclockwise) by the component tape 51 during production of the board P.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to Figure 11. A reel holder 150 shown in the second embodiment uses a bearing 67 instead of the stopper 64 of the first embodiment. The other configurations and functions are the same as those of the first embodiment described above, so the same components are denoted by the same reference numerals and will not be illustrated or described again.

Bearing 67 is a so-called ball bearing that uses spherical rolling elements and has a cylindrical outer raceway 67a, a cylindrical inner raceway 67b located inside the outer raceway 67a, and multiple rolling elements held between the outer raceway 67a and the inner raceway 67b. Bearing 67 is cylindrical and extends in the X-axis direction as a whole. The inner raceway 67b is fixed between cover plates 61 and 62. The outer raceway 67a is free to rotate relative to the inner raceway 67b.

Figure 11 is an enlarged side view of the bearing 67 and its vicinity during the process of moving the reel attachment portion 53 up and down. The outer raceway 67a moves up and down while abutting against the guide rail 45. At this time, the outer raceway 67a moves up and down without rolling relative to the guide rail 45. This reduces frictional resistance when moving the reel attachment portion 53 up and down, allowing the reel attachment portion 53 to be moved up and down with less force. Furthermore, wear on the guide rail 45 is suppressed, improving the durability of the guide rail 45.

<Other Embodiments>
The present invention is not limited to the embodiments described above and illustrated in the drawings, and for example, the following embodiments are also included within the technical scope of the present invention.

(1) In the above embodiment, the reel attachment portion 53 can move up and down along the guide rail 45, but the direction in which the reel attachment portion 53 moves is not limited to the up and down direction. For example, if the guide rail 45 extends diagonally downward, extends rearward, or extends upward from the rearward extension portion, the reel attachment portion 53 moves along the guide rail 45.

(2) In the above embodiment, a shaft 63 having two parallel D-cut surfaces (chord portions 63b) was used, but a single D-cut surface may also be used.

(3) In the above embodiment, the stopper 64 is cylindrical, but the shape of the stopper 64 is not limited to a cylinder. It may be rectangular, or may be spherical, instead of cylindrical.

(4) In the above embodiment, a reel holder 50 having a lock lever 65 was illustrated, but it is not necessary for the reel holder 50 to have a lock lever 65.

(5) In the above embodiment, a ball bearing with spherical rolling elements was used as an example of the bearing 67, but any bearing that can receive a radial load, such as a roller bearing with cylindrical rolling elements, may be used.

40: Tape feeder 41: Feeder main body 45: Guide rail 50: Reel holder 53: Reel attachment portion 63: Shaft (an example of a first restriction portion)
64: Stopper (an example of a second restricting portion)
θ1: First angle θ2: Second angle

Claims (5)

A reel holder,
a reel attachment portion attached to a guide rail of the tape feeder so as to be movable along the guide rail between an upper position and a lower position,
the reel attachment portion is rotatable with respect to the guide rail at the upper position and the lower position, such that an angle formed between an upper side of the reel attachment portion and a vertical line is between a first angle and a second angle;
When the reel attachment portion is at the second angle in the upper position and the lower position, the reel attachment portion is movable up and down along the guide rail,
When the reel attachment portion is not at the second angle in the upper position and the lower position, the reel attachment portion cannot move up and down along the guide rail . 2. The reel holder according to claim 1,
a stopper that can come into contact with the guide rail is provided on the reel mounting portion;
When the reel attachment portion is at the first angle and the second angle, the stopper abuts against the guide rail to restrict rotation of the reel attachment portion . 3. The reel holder according to claim 1 ,
a lock lever attached to the reel attachment portion so as to be rotatable between a locked position and an unlocked position ;
a reel holder that, when the angle of the reel attachment portion is the first angle, restricts rotation of the reel attachment portion by rotating the lock lever to the locked position, and releases the restriction by rotating the lock lever to the unlocked position . 3. The reel holder according to claim 2 ,
A reel holder using a rolling element as the stopper . A tape feeder that supplies components to a component mounting device,
Guide rails and
a reel attachment portion attached to the guide rail so as to be movable along the guide rail between an upper position and a lower position set on the guide rail,
the reel attachment portion is rotatable with respect to the guide rail at the upper position and the lower position, such that an angle formed between an upper side of the reel attachment portion and a vertical line is between a first angle and a second angle;
When the reel attachment portion is at the second angle in the upper position and the lower position, the reel attachment portion is movable up and down along the guide rail,
When the reel attachment portion is not at the second angle in the upper position and the lower position, the reel attachment portion cannot move up and down along the guide rail .