JP7353913B2 - Component mounting machine - Google Patents

Description

The technology disclosed in this specification relates to a component mounting machine that mounts electronic components on a board.

2. Description of the Related Art A component mounting machine that mounts electronic components on a board sometimes picks up the electronic component with a nozzle, moves the electronic component to a predetermined position on the board, and mounts the electronic component on the board. For example, Patent Document 1 discloses a component mounting machine that includes a nozzle, a head that has a mounting portion to which the nozzle is detachably mounted, and a cover that covers the head to which the nozzle is mounted. In the component mounter of Patent Document 1, by providing the cover, collision of other members, electronic components, etc. in the component mounter with the mounting portion is avoided, and loss or damage to the mounting portion is avoided.

JP 2018-56252 Publication

In a component mounting machine, the head is raised when moving the electronic component to a predetermined position on the board, and the head is lowered when picking up the electronic component and placing the electronic component on the board. Therefore, if the component mounter comes to an emergency stop or the power is cut off while it is in operation, the component mounter may stop with the nozzle lowered. If an operator manually moves the head in such a state, the nozzle attached to the head may collide with other members in the component mounting machine, and the nozzle may be lost or damaged. However, in the component mounting machine disclosed in Patent Document 1, although the mounting portion where the nozzle is mounted is covered with a cover and is therefore protected, the nozzle itself cannot be protected because it is not covered with a cover.

This specification discloses a technique that can appropriately protect a nozzle.

The component mounting machine disclosed in this specification mounts electronic components on a board. The component mounter includes a nozzle that sucks electronic components, a head to which the nozzle is detachably attached, and a part arranged around the nozzle attached to the head to prevent interference between the nozzle and other components of the component mounter. an interference prevention mechanism having a protrusion that can protrude from a first position accommodated in the head to a second position where the lower end is located below the lower end of the nozzle; .

In the above-mentioned component mounting machine, the protrusion can be moved from the first position where it is accommodated in the head to the second position where it is lowered. For example, by arranging the protrusion at the first position, the mounting work by the component mounter can be appropriately performed. In addition, for example, by placing the protrusion in the second position, even if an operator manually moves the head while the head is lowered, the protrusion will not touch other members in the component mounter beforehand. The collision makes it difficult for other members to collide with the nozzle. Therefore, loss or damage to the nozzle can be suppressed. In this way, by appropriately moving the position of the protrusion between the first position and the second position, it is possible to appropriately protect the nozzle while performing the mounting work appropriately.

FIG. 1 is a diagram showing a schematic configuration of a component mounting machine according to a first embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 2 is an enlarged view showing main part III of FIG. 1, in which (a) shows when the protrusion is located in the first position, and (b) shows when the protrusion is located in the second position. FIG. 2 is a block diagram showing the functions of a control device of a component mounting machine. 5 is a flowchart illustrating an example of processing when the component mounting machine stops operating. FIG. 7 is a diagram illustrating a schematic configuration of a protrusion in Example 2, when the protrusion is located at a second position.

The main features of the embodiment described below will be listed. The technical elements described below are independent technical elements that exhibit technical utility alone or in various combinations, and are limited to the combinations described in the claims as filed. It's not a thing.

(Feature 1) The component mounting machine disclosed in this specification includes a control unit that controls the protrusion to move from the first position to the second position, and a detection unit that detects the vertical position of the head. You may also have more. The control unit may move the protrusion from the first position to the second position when the component mounting machine stops and the detection unit detects that the position of the head is below a predetermined position. According to such a configuration, when the head is located below a predetermined position when the component mounting machine stops, the protrusion moves from the first position to the second position. That is, when the head stops at a position below a predetermined position, the protrusion moves downward, and when the head stops at a position not below a predetermined position, the protrusion does not move downward. When the nozzle is stopped above the predetermined position, the nozzle will not collide with other members even if the head is manually moved, so there is no need to move the protrusion to the second position. On the other hand, if the nozzle is stopped below a predetermined position and the head is manually moved, there is a risk that the nozzle will collide with another member. In such a case, by moving the protrusion to the second position, the protrusion can protect the nozzle from other members within the component mounting machine. In this way, the protrusion can only be moved if necessary to protect the nozzle.

(Feature 2) In the component mounter disclosed in this specification, the controller moves the protrusion from the first position to the second position when the component mounter stops and the detector does not detect the position of the head. It may be moved to another position. If the detection unit cannot detect the position of the head, it is not known at what position in the vertical direction the head is when the component mounter stops. In such a case, by moving the protrusion to the second position, it is possible to prepare for the case where the head stops in a downward position. Thereby, safety can be ensured.

(Feature 3) In the component mounting machine disclosed in this specification, the protrusion may be configured to cover the entire circumference of the nozzle in the circumferential direction when the protrusion is in the second position. According to such a configuration, even if the head is manually moved in any direction, the protrusion can prevent the nozzle from colliding with other members.

(Feature 4) In the component mounting machine disclosed in this specification, the protrusion may be configured to be disposed in a part of the nozzle in the circumferential direction when the protrusion is in the second position. According to such a configuration, even if the protrusion is in the second position, the nozzle is not covered all around by the protrusion. Therefore, it becomes easier for the operator to visually check the nozzle.

(Example 1)
Hereinafter, a component mounting machine 10 according to an embodiment will be described. The component mounting machine 10 is a device that mounts the electronic component 4 on the circuit board 2. The component mounting machine 10 is also called an electronic component mounting device or a chip mounter. Usually, the component mounting machine 10 is installed together with other board working machines such as a solder printing machine and a board inspection machine to form a series of mounting lines.

As shown in FIGS. 1 and 2, the component mounting machine 10 moves a plurality of component feeders 12, a feeder holding section 14, a mounting head 16, a sensor unit 30, and a movement that moves the mounting head 16 and the sensor unit 30. It includes a device 18, a substrate conveyor 20, a control device 22, and a touch panel 24. A PC 8 configured to be able to communicate with the component mounter 10 is arranged outside the component mounter 10 . Each component feeder 12 accommodates a plurality of electronic components 4. The component feeder 12 is detachably attached to the feeder holding section 14 and supplies the electronic components 4 to the mounting head 16 . The specific configuration of the component feeder 12 is not particularly limited. Each component feeder 12 is, for example, a tape-type feeder that stores a plurality of electronic components 4 on a wound tape, a tray-type feeder that stores a plurality of electronic components 4 on a tray, or a tray-type feeder that stores a plurality of electronic components 4 in a container. It may be any bulk type feeder that randomly accommodates.

The feeder holding section 14 includes a plurality of slots, and the component feeder 12 can be removably installed in each of the plurality of slots. The feeder holding section 14 may be fixed to the component mounter 10 or may be detachable from the component mounter 10.

The mounting head 16 has a nozzle 6 that attracts the electronic component 4 and an interference prevention mechanism 26 (see FIG. 3). The nozzle 6 is detachably attached to the mounting head 16. The mounting head 16 is capable of moving the nozzle 6 in the Z direction (vertical direction here), and moves the nozzle 6 toward and away from the component feeder 12 and the circuit board 2 . The mounting head 16 can suck the electronic component 4 from the component feeder 12 using the nozzle 6 and can mount the electronic component 4 sucked by the nozzle 6 onto the circuit board 2 . Note that the mounting head 16 is not limited to having a single nozzle 6, but may have a plurality of nozzles 6.

The interference prevention mechanism 26 is configured to prevent the nozzle 6 from interfering with other members within the component mounter 10. As shown in FIGS. 3(a) and 3(b), the interference prevention mechanism 26 has two positions: an upper first position (see FIG. 3(a)) and a lower second position (see FIG. 3(b)). It includes a protrusion 28 that is movable in the vertical direction (Z direction) and an actuator (not shown) that moves the protrusion 28 in the vertical direction. By driving the actuator, the protrusion 28 moves from the first position to the second position and from the second position to the first position.

The protrusion 28 has a cylindrical shape, and its outer circumference substantially matches the outer circumference of the mounting head 16 . Furthermore, the protrusion 28 is configured such that the nozzle 6 is located inside the inner circumference of the mounting head 16 when viewed from below. The dimension of the protrusion 28 in the height direction (Z direction) is made larger than the dimension in which the nozzle 6 protrudes from the mounting head 16. When the protrusion 28 is located at the second position (protrusion position), the protrusion 28 covers the entire nozzle 6 in the circumferential direction. For example, an operator may manually move the mounting head 16 while the component mounter 10 is stopped. In such a case, by positioning the protrusion 28 in the second position, although the protrusion 28 may collide with other members in the component mounter 10, the nozzle 6 will not collide with other members. You can avoid that.

Furthermore, the protrusion 28 is accommodated within the mounting head 16 such that its lower end substantially coincides with the lower end of the mounting head 16 when located in the first position. By positioning the protruding portion 28 at the first position during operation of the component mounter 10, it is possible to avoid interfering with the operation of the nozzle 6 during mounting work (for example, suction of the electronic component 4, etc.).

Further, the protruding portion 28 is composed of a metal portion 28a and a resin portion 28b. The metal portion 28a occupies most of the protrusion 28, and is made of metal such as stainless steel, aluminum, or iron, for example. Note that the type of metal forming the metal portion 28a is not particularly limited. Since most of the protrusion 28 is the metal part 28a, the protrusion 28 is less likely to be damaged even if other members in the component mounter 10 collide with the protrusion 28. This can prevent the nozzle 6 located inside the protrusion 28 from being lost or damaged.

The resin part 28b is arranged below the metal part 28a and covers the lower end of the metal part 28a. The resin portion 28b is made of a resin such as rubber or urethane, but the type of resin is not particularly limited. When the protrusion 28 is moved from the first position to the second position, the protrusion 28 may collide with a member such as the circuit board 2 or a camera (not shown) located below the protrusion 28 . Since the lower end of the metal part 28a is covered with the resin part 28b, when the protrusion part 28 is moved from the first position to the second position, there is a possibility that the protrusion part 28 will damage the member located below. can be reduced.

As shown in FIG. 1, the sensor unit 30 is fixed to the movable base 18a and moves integrally with the movable base 18a. The sensor unit 30 includes a sensor support section 32 and a sensor 34. The sensor support section 32 is fixed to the movable base 18a. The sensor 34 is fixed below the sensor support part 32. The sensor 34 is an optical sensor, and is arranged so that its light receiving surface faces the side surface of the nozzle 6. The sensor 34 detects the position of the tip of the nozzle 6. Information detected by the sensor 34 (position of the tip of the nozzle 6) is output to a memory (not shown) of the control device 22. In this embodiment, an optical sensor 34 is used, but the type of sensor is not particularly limited as long as it can detect the position of the tip of the nozzle 6. Further, the sensor 34 is an example of a "detection section".

The moving device 18 moves the mounting head 16 and the sensor unit 30 between the component feeder 12 and the circuit board 2. Although it is an example, the moving device 18 of this embodiment is an XY robot that moves a moving base 18a in the X direction and the Y direction, and the mounting head 16 and the sensor unit 30 are fixed to the moving base 18a. Note that the mounting head 16 is not limited to being fixed to the movable base 18a, and may be detachably attached to the movable base 18a.

The board conveyor 20 is a device that carries in, positions, and carries out the circuit board 2. Although this is just one example, the board conveyor 20 of this embodiment includes a pair of belt conveyors and a support device (not shown) that supports the circuit board 2 from below.

The control device 22 is configured using a computer including a memory and a CPU. As shown in FIG. 4, the control device 22 is connected to the protrusion 28 and controls the protrusion 28. Specifically, the control device 22 moves the protrusion 28 between the first position and the second position. The control device 22 is also connected to a sensor 34, and the position of the tip of the nozzle 6 detected by the sensor 34 is input. The touch panel 24 is a display device that provides various information about the component mounter 10 to the operator, and is an input device that receives instructions and information from the operator.

With reference to FIG. 5, a process for stopping the operation of the component mounter 10 will be described. The component mounting machine 10 may stop operating according to the production program (end of production), or may stop operating due to an emergency stop due to some kind of malfunction or an unexpected power cutoff. When the operation is stopped according to the production program, the nozzle 6 is placed in the upper position, but in the case of an emergency stop, etc., the nozzle 6 is not necessarily placed in the upper position, but is placed in the lower position. Sometimes it is in the middle of ascending and descending. If the operator manually moves the mounting head 16 while the nozzle 6 is not positioned upward, the nozzle 6 may collide with other members in the component mounter 10, resulting in breakage or damage. be. Below, a process for lowering the protrusion 28 when the component mounter 10 stops operating due to an emergency stop or power cut-off will be described. In this embodiment, before the component mounter 10 is stopped, the component mounter 10 is operating according to the production program. Therefore, the following process is started with the protrusion 28 located at the first position.

As shown in FIG. 5, first, the control device 22 determines whether to stop the operation of the component mounter 10 (S12). If there is no abnormality that causes the operation of the component mounter 10 to stop, there is no need to stop the operation of the component mounter 10 (NO in step S12), and the process from step S14 onwards is skipped and the process continues. finish. On the other hand, when stopping the operation of the component mounter 10 (YES in step S12), the control device 22 determines whether the stoppage of the operation is a normal stop (S14). For example, the control device 22 determines whether or not the component mounter 10 has executed the production program to the end when the operation is finished according to the production program, and when the component mounter 10 is brought to an emergency stop, the controller 22 determines whether or not the component mounter 10 has executed the production program to the end. It is determined whether an abnormality that causes an emergency stop has occurred (for example, an abnormality detected by a sensor, power supply cut off from an external power source due to a power outage, etc.). When the operation of the component mounter 10 is to be stopped normally (YES in step S14), each part of the component mounter 10 is moved to a predetermined initial position and the operation is stopped (S16), and the process is ended. Note that even when the power supply from an external power source to the component mounter 10 is cut off due to a power outage or the like, the control device 22 is configured to be able to execute the process shown in FIG. has been done.

On the other hand, if the operation of the component mounter 10 is not normally stopped (NO in step S14), that is, if the operation of the component mounter 10 is to be stopped in an emergency, the control device 22 first controls the movable part of the component mounter 10 ( The operation of the mounting head 16, component feeder 12, moving device 18, substrate conveyor 20, etc.) is stopped, and then it is determined whether information regarding the position of the nozzle 6 can be acquired from the sensor 34 (S18). For example, when an abnormality that causes an emergency stop is detected and the operation of the component mounter 10 is stopped, the control device 22 receives information from the sensor 34 because the power supply from the external power source to the component mounter 10 is not cut off. can be obtained. On the other hand, when the component mounter 10 is stopped due to a current cutoff such as a power outage, the input of information from the sensor 34 is also cut off. In this case, the control device 22 cannot specify at which position in the vertical direction (Z direction) the nozzle 6 is stopped. Therefore, if the information from the sensor 34 cannot be acquired (NO in step S18), the process of step S20 is skipped, and the control device 22 moves the protrusion 28 from the first position to the second position (S22). Thereby, the protrusion 28 can be arranged around the nozzle 6 in case the nozzle 6 is stopped in a downward position.

When the information from the sensor 34 is acquired (YES in step S18), the control device 22 specifies the position of the nozzle 6 in the vertical direction (Z direction) based on the information acquired from the sensor 34 in step S18. Then, the control device 22 determines whether the identified position of the nozzle 6 is below a predetermined position (S20). The predetermined position is stored in advance in a memory (not shown) of the control device 22.

If the nozzle 6 is located below the predetermined position (YES in step S20), the control device 22 moves the protrusion 28 from the first position to the second position (S22). Many other members are arranged at relatively low positions within the component mounter 10. Therefore, if the operator manually moves the mounting head 16 when the nozzle 6 is stopped at a low position, the nozzle 6 may collide with other members in the component mounter 10. By moving the protrusion 28 from the first position to the second position when the nozzle 6 is located below a predetermined position, the nozzle 6 can be prevented from colliding with other members.

On the other hand, if the nozzle 6 is not located below the predetermined position (NO in step S20), the nozzle 6 is located at a relatively high position, so even if the operator manually moves the mounting head 16, the nozzle 6 is less likely to collide with other members within the component mounter 10. In this case, there is no need to move the protrusion 28 to the second position, so step S22 is skipped and the process ends. In this way, when it is necessary to protect the nozzle 6 by determining whether the position of the tip of the nozzle 6 is below a predetermined position when the operation of the component mounter 10 is stopped (nozzle The protrusion 28 can only be moved to the second position (when the protrusion 28 is stopped in the lower position).

(Example 2)
In the first embodiment described above, the protrusion 28 has a shape that covers the entire nozzle 6 in the circumferential direction when located at the second position, but the protrusion 28 is not limited to such a configuration. The protrusion may be configured to prevent the nozzle 6 from colliding with other members within the component mounter 10. For example, the protrusion 128 may have a shape that is disposed in a part of the nozzle 6 in the circumferential direction when it is located at the second position, or may have a columnar shape as shown in FIG. 6 . Note that the component mounting machine of this embodiment has a protrusion 128 that is different from the protrusion 28 of the first embodiment, and the other configurations are substantially the same. Therefore, the description of the same configuration as the component mounter 10 of the first embodiment will be omitted.

The protruding portion 128 has a columnar shape and is arranged at a position along the outer periphery of the mounting head 16. Specifically, the protrusion 128 is arranged at a position that substantially coincides with a corner of the rectangular mounting head 16 when viewed from below. In this embodiment, four protrusions 128 are arranged on the mounting head 16, and the four protrusions 128 are arranged at each corner of the mounting head 16. The dimension of the protruding portion 128 in the height direction (Z direction) is made larger than the dimension of the nozzle 6 protruding from the mounting head 16 . Furthermore, the protruding portion 128 is composed of a metal portion 128a and a resin portion 128b. Note that the metal portion 128a and the resin portion 128b are substantially the same as the metal portion 28a and the resin portion 28b of Example 1, so detailed description thereof will be omitted.

The protruding portion 128 is controlled by the control device 22, and when the control device 22 drives the actuator, the protruding portion 128 is moved between a first position where it is accommodated in the mounting head 16 and a second position where it protrudes downward from the mounting head 16. It is possible to move between. When the four protrusions 128 are located at the second position, the four protrusions 128 are arranged in a part of the nozzle 6 in the circumferential direction. When the operator manually moves the mounting head 16 in this state, the protrusion 128 collides with other members in the component mounter 10, making it difficult for the nozzle 6 to collide with other members. In this embodiment, since the four protrusions 128 are arranged only in a part of the circumferential direction of the nozzle 6, other members in the component mounter 10 are less likely to collide with the nozzle 6, but between the protrusions 128. It is also possible for the liquid to pass through and collide with the nozzle 6. On the other hand, even if the four protrusions 128 are moved to the second position, the entire circumferential direction of the nozzle 6 is not covered, making it easier for the operator to visually observe the nozzle 6. By providing the protruding portion 128 in a part of the circumferential direction of the nozzle 6 in this way, it is possible to suppress loss or damage to the nozzle 6, and it is also possible to make the nozzle 6 easily visible to the operator.

Although the four protrusions 128 in this embodiment are arranged at positions corresponding to the four corners of the mounting head 16, the present invention is not limited to such a configuration. The protrusions may be arranged at positions along the outer periphery of the mounting head 16, and may be arranged at three or fewer of the four positions corresponding to the corners of the mounting head 16. Further, the protruding portion may be arranged not only at a position corresponding to a corner of the mounting head 16 but also between two corners on the outer peripheral side of the mounting head 16. However, it is better to arrange the protrusion on the front side (-Y direction side in FIG. 6) rather than the back side (+Y direction side in FIG. 6) of the component mounter 10. When the worker manually moves the mounting head 16, there is a possibility of moving it forward, backward, left or right (X direction and Y direction), but in particular, in order to bring the mounting head 16 closer to the worker, It is often moved from the back side to the front side. Therefore, especially by arranging the protrusion on the front side (-Y direction side), chipping and damage to the nozzle 6 can be suitably suppressed.

Although specific examples of the technology disclosed in this specification have been described above in detail, these are merely illustrative and do not limit the scope of the claims. The techniques described in the claims include various modifications and changes to the specific examples illustrated above. Further, the technical elements described in this specification or the drawings exhibit technical usefulness singly or in various combinations, and are not limited to the combinations described in the claims as filed.

2: Circuit board 4: Electronic component 6: Nozzle 8: PC
10: Component mounting machine 12: Component feeder 14: Feeder holding section 18: Moving device 20: Board conveyor 22: Control device 24: Touch panel 26: Interference prevention mechanism 28: Protruding section 28a: Metal section 28b: Resin section 30: Sensor unit 34: Sensor

Claims (4)

A component mounting machine that mounts electronic components on a board,
a nozzle that sucks the electronic component;
a head to which the nozzle is removably attached;
an interference prevention mechanism disposed around the nozzle attached to the head to prevent interference between the nozzle and other members of the component mounter; The interference prevention mechanism has a protrusion whose lower end can protrude to a second position located below the lower end of the nozzle;
a control unit that controls the protrusion to move from the first position to the second position;
a detection unit that detects the vertical position of the nozzle;
Equipped with
The control unit moves the protrusion from the first position to the second position when the component mounting machine stops and the detection unit detects that the position of the nozzle is below a predetermined position. A moving component mounting machine. A component mounting machine that mounts electronic components on a board,
a nozzle that sucks the electronic component;
a head to which the nozzle is removably attached;
an interference prevention mechanism disposed around the nozzle attached to the head to prevent interference between the nozzle and other members of the component mounter; The interference prevention mechanism has a protrusion whose lower end can protrude to a second position located below the lower end of the nozzle;
a control unit that controls the protrusion to move from the first position to the second position;
a detection unit that detects the vertical position of the nozzle;
Equipped with
The control unit is configured to move the protrusion from the first position to the second position when the component mounting machine stops and the detection unit does not detect the position of the nozzle . Machine. 3. The component mounting machine according to claim 1 , wherein the protrusion is configured to cover the entire circumference of the nozzle in the circumferential direction when the protrusion is in the second position. 3. The component mounter according to claim 1 , wherein the protrusion is arranged in a part of the nozzle in a circumferential direction when the protrusion is in the second position.

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