JP7515066B2 - Component Mounting Equipment - Google Patents

Description

This disclosure relates to a component mounting device that mounts components on a board.

Conventionally, component mounting devices are equipped with a tray feeder that holds multiple trays containing components. When all components stored in the tray have been mounted, or when the type of component to be mounted is changed, the worker replaces the tray.

For example, Patent Document 1 describes a component mounting device that is equipped with two tray feeders, and that improves mounting efficiency by not stopping the drive of the mounting head of the component mounting device even during tray replacement work on one of the tray feeders.

JP 2012-19145 A

However, there is a demand for greater safety when changing trays in component mounting devices.

Therefore, the objective of this disclosure is to provide a component mounting device with improved safety.

In order to achieve the above object, a component mounting apparatus according to one aspect of the present disclosure is a component mounting apparatus that mounts electronic components on a substrate, comprising:
a tray feeder that supplies the tray storing the electronic components to a component supply position;
a mounting head that picks up the electronic components from the tray and mounts them on a substrate,
The tray feeder comprises:
a tray storage section that stores a plurality of the trays in a vertical arrangement;
a drawer that draws the tray from the tray housing to a respective drawer position in a front internal space;
a lifting mechanism for lifting the drawer between a drawer position of each tray and the component supply position that is higher than the drawer position of the highest tray;
a door that allows access to the tray storage section from the outside;
and a locking mechanism that prevents the drawer from descending when the door is open.

It is possible to provide a component mounting device with improved safety.

FIG. 1 is a plan view of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a side cross-sectional view of a component mounting device according to an embodiment of the present disclosure. FIG. 1 is a schematic diagram illustrating a configuration of a tray feeder used in a component mounting device according to an embodiment of the present disclosure. FIG. 1 is a side cross-sectional view of a tray feeder of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a side cross-sectional view of a tray feeder of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a side cross-sectional view of a tray feeder of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a perspective view of a locking mechanism of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a perspective view of a locking mechanism of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a block diagram showing a configuration of a control system of a component mounting apparatus according to an embodiment of the present disclosure. FIG. 1 is a partial plan view of a component mounting apparatus according to an embodiment of the present disclosure; FIG. 1 is a side cross-sectional view of a tray feeder of a component mounting apparatus according to an embodiment of the present disclosure.

According to one aspect of the present disclosure, a component mounting device for mounting electronic components on a substrate includes a tray feeder that supplies a tray storing the electronic components to a component supply position, and a mounting head that removes the electronic components from the tray and mounts them on a substrate. The tray feeder includes a tray storage section that stores a plurality of the trays arranged vertically, a pull-out section that pulls the trays from the tray storage section to their respective pull-out positions in a front internal space, a lifting mechanism that raises and lowers the pull-out section between the respective tray pull-out positions and the component supply position that is higher than the pull-out position of the highest tray, a door that allows access to the tray storage section from the outside, and a locking mechanism that stops the pull-out section from descending when the door is open.

According to a second aspect of the present disclosure, the device includes a first detection unit that detects whether the door is open or closed, and a control unit that instructs the locking mechanism to lock the drive of the lifting mechanism based on the detection result that the door is open by the first detection unit.

According to a third aspect of the present disclosure, the drawer unit includes a second detection unit that detects that the drawer unit is in the component supply position between the internal space of the tray feeder and the mounting head, and a door lock unit that locks the door in a closed state, and the control unit causes the door lock unit to unlock the door when the second detection unit detects that the drawer unit is in the component supply position.

According to a fourth aspect of the present disclosure, the lifting mechanism includes a motor, a first pulley connected to the motor, a feed screw connected to the drawer, a second pulley connected to the feed screw, and a belt wound around the first pulley and the second pulley.

According to a fifth aspect of the present disclosure, the first pulley is connected to the lower end of the motor, the second pulley is connected to the lower end of the feed screw, and the motor and the feed screw are each arranged parallel to and above the belt.

According to a sixth aspect of the present disclosure, the locking mechanism stops the feed screw from rotating so that the drawer portion is lowered.

According to a seventh aspect of the present disclosure, the locking mechanism has a ratchet mechanism that stops the rotation of the feed screw.

(Embodiment)
A component mounting apparatus 1 according to an embodiment of the present disclosure will be described below with reference to Fig. 1 and Fig. 2. Fig. 1 is a plan view of the component mounting apparatus 1 according to the embodiment. Fig. 2 is a side cross-sectional view of the component mounting apparatus 1 according to the embodiment. First, the configuration of the component mounting apparatus 1 that mounts electronic components taken out from a component supply unit onto a substrate 3 will be described.

In FIG. 1, a board transport mechanism 2 is disposed on a base 1a of a component mounting device 1. The board transport mechanism 2 is configured with a first board transport lane LI and a second board transport lane LII, which transport the board 3 to be mounted, arranged in parallel in the board transport direction (X direction). The first board transport lane LI and the second board transport lane LII are each composed of a pair of a first board transport conveyor 2A and a second board transport conveyor 2B, which transport the board 3 delivered from the upstream side and position and hold it at a work position by the component mounting mechanism described below. The first board transport lane LI and the second board transport lane LII are each provided with board detection sensors S1 and S2, which detect the board 3 that has been brought in.

A first component supply unit 4A and a second component supply unit 4B are disposed on either side of the board transport mechanism 2. The first component supply unit 4A includes a tray feeder 5 in which a first tray supply mechanism 5A and a second tray supply mechanism 5B are arranged side by side. As shown in FIG. 2, the first tray supply mechanism 5A and the second tray supply mechanism 5B constituting the tray feeder 5 have the function of pulling out a pallet 16 that holds a tray 18 that stores, in a planar arrangement, relatively large electronic components to be mounted, from the tray storage unit 5b, and moving it to a component supply position 5a set near the height of the upper end of the tray storage unit 5b.

In the second component supply section 4B, a plurality of tape feeders 6 are arranged in parallel. The tape feeders 6 have a function of pitch-feeding a carrier tape 15 holding small electronic components to a pick-up position 6a (see FIG. 2). The tape feeders 6 are attached to a carriage 13 that is set movably in the second component supply section 4B, and the carrier tape 15 is pulled out from a supply reel 14 held by the carriage 13 and supplied to the tape feeders 6.

A Y-axis moving table 7 is disposed in the Y direction at one end of the upper surface of the base 1a, and a first X-axis moving table 8A and a second X-axis moving table 8B are mounted on the Y-axis moving table 7 so as to be freely slidable in the Y direction. A first mounting head 9A and a second mounting head 9B are mounted on the first X-axis moving table 8A and the second X-axis moving table 8B, respectively, so as to be freely slidable in the X direction. Both the first mounting head 9A and the second mounting head 9B are multi-type heads equipped with multiple unit mounting heads 10, and a suction nozzle 10a (see Figure 2) that suctions and holds electronic components is mounted on the lower end of each unit mounting head 10.

By driving the Y-axis moving table 7, the first X-axis moving table 8A, and the second X-axis moving table 8B, the first mounting head 9A and the second mounting head 9B each move horizontally individually, and the first mounting head 9A retrieves and holds an electronic component from the tray feeder 5 of the first component supply unit 4A, and the second mounting head 9B retrieves and holds an electronic component from the tape feeder 6 of the second component supply unit 4B, and transfers and mounts it onto the board 3 transported into the first board transport lane LI and the second board transport lane LII. The Y-axis moving table 7, the first X-axis moving table 8A, and the second X-axis moving table 8B constitute a head moving mechanism that moves the first mounting head 9A and the second mounting head 9B, and this head moving mechanism and the first mounting head 9A and the second mounting head 9B constitute a component mounting mechanism that takes electronic components from the pallet 16 that has moved to the component supply position 5a of the tray feeder 5 in the first component supply unit 4A, and from the tape feeder 6 in the second component supply unit 4B, and mounts them on the board 3.

The first mounting head 9A and the second mounting head 9B each have a board recognition camera 11 that moves integrally with them, located on the underside of the first X-axis moving table 8A and the second X-axis moving table 8B. By moving the first mounting head 9A and the second mounting head 9B above the board 3, the board 3 can be imaged by the board recognition camera 11. The image results are processed to recognize the positions of the board 3 and the component mounting points.

A component recognition camera 12 is disposed on the path along which the mounting heads 9A, 9B move from their respective component supply units to the board 3. As the mounting heads 9A, 9B holding electronic components move above the component recognition camera 12, the held electronic components are imaged by the component recognition camera 12, thereby recognizing the positions of the electronic components while held by the mounting heads 9A, 9B. During the mounting operation on these boards 3, the mounting positions of the first mounting head 9A and the second mounting head 9B are corrected taking into account the board recognition results by the board recognition camera 11 and the component recognition results by the component recognition camera 12.

(tray feeder)
Next, the configuration of the tray feeder 5 will be described with reference to Figures 3A to 3D. In the tray feeder 5, the side of the board transport mechanism 2 of the component mounting device 1 is the front, and the opposite side is the rear. As shown in Figure 3A, the tray feeder 5 is configured by arranging a first tray supply mechanism 5A and a second tray supply mechanism 5B in parallel, each of which can operate independently. The first tray supply mechanism 5A and the second tray supply mechanism 5B have the function of positioning a pallet 16 holding a tray 18 on which electronic components are stored at a component supply position 5a. In Figure 3A, the magazine 17 and the tray 18 are omitted in order to make it easier to understand the movement of the pallet 16.

Figure 3B shows the configuration of the first tray supply mechanism 5A and the second tray supply mechanism 5B. The tray storage section 5b is supported by a frame 25, and multiple magazines 17 are stacked inside the tray storage section 5b. Multiple pallets 16 and trays 18 are stacked vertically inside each magazine 17. Trays 18 on which multiple electronic components are stored in a grid pattern are attached to the pallets 16 stored in the magazines 17. A door 29 that can be opened and closed freely to allow working access to the tray storage section 5b from outside is provided at the rear of the tray storage section 5b (the side opposite the board transport mechanism 2), so that the trays 18 stored in the magazines 17 can be stored and removed for each magazine 17.

The closed state of the door 29 is controlled by a door locking unit 29a provided in the tray storage unit 5b. The door 29 can be opened only when the door locking unit 29a is released. The door locking unit 29a is, for example, a mechanism in which a rod of an air-driven cylinder provided in the door frame is inserted into a ring provided in the door. For example, when an operator instructs the control unit 30 to unlock the door 29, the access permission processing unit 30b of the control unit 30 stops the supply of air and unlocks the door 29. When the access permission processing unit 30b resumes the supply of air, the door 29 is locked again. The door 29 may be locked and unlocked by switching a valve (solenoid valve) in a supply path that supplies air to the air-driven cylinder.

The door 29 is also provided with first detection units S3 and S4 for detecting the open/closed state of the door 29 for each of the first tray supply mechanism 5A and the second tray supply mechanism 5B. The open/closed state of the door 29 is interlocked with the operating state of the movable mechanism of the component mounting device 1, and to protect the safety of the operator, when the door 29 is open, the device is not allowed to operate unless the preset access permission conditions are met.

A lifting mechanism 20 is disposed on the frame 22 of the tray feeder 5, and by driving the lifting mechanism 20, the drawer section 28 moves up and down within the internal space PS in front of the tray storage section 5b. The drawer section 28 draws the pallets 16 stored in the tray storage section 5b to their respective drawer positions Pu in the internal space PS (see FIG. 3B), and holds them on the upper surface of the drawer section 28 located at the drawer position Pu. The drawer section 28 is equipped with a pallet moving mechanism (not shown), which allows the pallet 16 in the tray storage section 5b to be drawn to the drawer section 28 by the pallet moving mechanism, and can also be pushed into the tray storage section 5b for storage. By driving the lifting mechanism 20 to raise the drawer section 28, the pallet 16 moves together with the tray 18 it holds to the component supply position 5a from which the first mounting head 9A and the second mounting head 9B take out electronic components. The component supply position 5a is higher than the drawer position Pu of the highest tray 18. The lifting mechanism 20 raises and lowers the drawer 28 between the drawer position Pu of each tray 18 and the component supply position 5a.

The first mounting head 9A and the second mounting head 9B pick up electronic components from the trays 18 held on the pallets 16 by the suction nozzles 10a of the unit mounting heads 10, and transfer and mount them on the board transport mechanism 2. Above the tray storage section 5b is disposed a discharge section 5c that stores electronic components that are discharged without being mounted, and above the discharge section 5c is disposed a supply section 5d that removes the pallets 16 on which the empty trays 18 have been attached after the electronic components have been picked up, and reinserts the pallets 16 after the electronic components have been replenished.

(Lifting mechanism)
The lifting mechanism 20 lifts and lowers the drawer unit 28 within the internal space PS of the tray feeder 5. The lifting mechanism 20 includes a motor 26, a feed screw 27, a power transmission mechanism 50, and a locking mechanism 61. The motor 26 and the feed screw 27 are not directly connected to each other, but are connected to each other via the power transmission mechanism 50. The motor 26 drives and rotates the feed screw 27 to lift and lower the drawer unit 28 connected to the feed screw 27.

The power transmission mechanism 50 transmits the rotational driving force of the motor 26 to the feed screw 27. The power transmission mechanism 50 includes, for example, a first pulley 51, a second pulley 53, and a belt 55. The output shaft of the motor 26 is connected to the first pulley 51. A belt 55 is wound between the first pulley 51, which is the driving pulley, and the second pulley, which is the driven pulley. The second pulley is rotatably connected to the lower end of the feed screw 27, and the rotational driving force of the motor 26 is transmitted to the feed screw 27 via the first pulley 51, the belt 55, and the second pulley. Note that instead of using a pulley and a belt as the power transmission mechanism 50, a sprocket and a chain may be used.

Since the power transmission mechanism 50 is provided, space can be secured below the tray feeder 5. This allows the feed screw 27 to be extended to the bottom of the tray feeder 5, and the lifting stroke of the drawer 28 can be lengthened. As a result, the capacity of the tray storage section 5b can be increased, and the number of trays 18 that can be stored in the tray storage section 5b can be increased.

(Locking mechanism)
The configuration of the lock mechanism 61 will be described with reference to Figures 4A and 4B. Figures 4A and 4B are perspective views of the lock mechanism of the component mounting device according to the embodiment of the present disclosure. The lock mechanism 61 prevents the drawer 28 from falling. The lock mechanism 61, for example, locks the rotation of the feed screw 27. The lock mechanism 61 includes an actuator 63, a first movable member 65, a second movable member 67, a rotating shaft 69, bearings 71 and 73, a ratchet mechanism 74, and a second detection unit 77. The ratchet mechanism 74 has a claw portion 75 rotated by the rotating shaft 69 and a gear 76 fixed to the lower end of the feed screw 27.

The actuator 63 includes a cylinder 81 and a valve (not shown). For example, a fluid such as air is supplied to the cylinder 81 via the valve. The cylinder 81 has a piston rod 81a that can move in a linear direction. The piston rod 81a is biased in a direction that protrudes from the cylinder 81 by a spring (not shown) arranged inside the cylinder 81. The pressure of the fluid supplied to the cylinder 81 acts in a direction that retracts the piston rod 81a into the cylinder 81 against this spring force. Therefore, while the fluid is being supplied, the amount of protrusion of the piston rod 81a is the smallest, as shown in FIG. 4A. When the first detection units S3 and S4 detect that the door 29 is open, the control unit 30 cuts off the power supply to the valve. When the control unit 30 cuts off the power supply to the valve, the valve is closed and the supply of the fluid to the cylinder 81 is stopped. As a result, the spring force causes the piston rod 81a to move toward the outside of the cylinder 81, and the amount of protrusion of the piston rod 81a is maximized, as shown in FIG. 4B.

The first movable member 65 is connected to one outer end of the piston rod 81a and moves together with the piston rod 81a.

The second movable member 67 has one end connected to the upper surface of the first movable member 65 and the other end connected to the lower end of the rotating shaft 69.

The rotating shaft 69 is rotatably supported by a pair of bearings 71, 73. The upper end of the rotating shaft 69 is connected to a claw portion 75 of a ratchet mechanism 74. The bearings 71, 73 are each supported by a part of the frame 22. Therefore, the linear movement of the first movable member 65 is converted into the rotational movement of the second movable member 67, which rotates the claw portion 75 via the rotating shaft 69.

One end of the claw portion 75 can mesh with the gear 76, and as shown in FIG. 4B, when the claw portion 75 rotates due to the operation of the actuator 63, one end of the claw portion 75 meshes with the gear 76, stopping the rotation of the gear 76. This stops the rotation of the feed screw 27. The claw portion 75 has a segment 75a at the other end. When the first detection units S3 and S4 detect that the door 29 is open, the control unit 30 cuts off the power supply to the motor 26. In this way, in addition to cutting off the power supply to the motor 26, the lock mechanism 61 locks the rotation of the feed screw 27, so that even if the brake of the motor 26 fails or the belt 55 breaks, the drawer portion 28 stops descending, so that the operator can be protected more reliably. Even in this state, the unit mounting head 10 continues to move, so that mounting of electronic components on the board 3 can continue.

The second detection unit 77 detects whether the lock mechanism 61 is in a locked state, in which the rotation of the feed screw 27 is locked, or in a released state. For example, the second detection unit 77 detects the segment 75a of the claw portion 75 to detect whether the claw portion 75 is engaged with the gear 76. When the claw portion 75 is not engaged with the gear 76, the second detection unit 77 can detect the segment 75a. When the claw portion 75 is engaged with the gear 76, the second detection unit 77 cannot detect the segment 75a. The second detection unit 77 is, for example, a photoelectric sensor having a light emitting unit and a light receiving unit. When the segment 75a blocks the light irradiated from the light emitting unit, the light receiving unit cannot detect the light, and as a result, the second detection unit 77 detects the segment 75a.

Next, the configuration of the control system will be described with reference to FIG. 5. In FIG. 5, the component mounting device 1 is composed of a control unit 30, a memory unit 31, a recognition processing unit 32, a mechanism driving unit 33, an input unit 34, and a display unit 35. The control unit 30 has a function of executing operation control and calculation processing required for the work operation of the component mounting device 1 based on the control program and various data stored in the memory unit 31, and is equipped with a mounting control processing unit 30a and an access permission processing unit 30b as internal processing functions. The mounting control processing unit 30a performs processing to control the mounting operation for mounting electronic components on the board 3. The control unit 30 includes, for example, a processor or FPGA. The memory unit 31 is a storage device composed of at least one of a memory, a hard disk, an SSD, etc.

The access permission processing unit 30b performs a process for setting whether or not an operator is permitted to access the tray supply mechanism. In order for an operator to access the tray supply mechanism, the door 29 must be opened. In this embodiment, in order to ensure the safety of the operator, the door lock unit 29a is set to have a control interlock so that the door 29 is unlocked only when a predetermined condition, which will be described later, is satisfied. When the door 29 is to be locked again, the door 29 may be locked by cutting off the power to the valve at the time when the operator inputs an instruction to lock the door 29 to the control unit 30 via the input unit 34 of the component mounting device 1 or the operation unit of the tray feeder 5, thereby prohibiting access to the tray operation mechanism.

The memory unit 31 stores various operation programs required to execute component mounting work, as well as mounting data 31a and component storage data 31b. The mounting data 31a is data that associates mounting coordinates that specify the component type and mounting position of the component to be mounted with mounting points that indicate the mounting locations on the board 3 to be mounted according to the mounting order. The component storage data 31b is data that indicates the storage state of the trays in the tray storage units 5b of the first tray supply mechanism 5A and the second tray supply mechanism 5B, thereby specifying the component type and storage position of the trays stored in each tray storage unit 5b.

The recognition processing unit 32 detects the component mounting position on the board 3 and identifies and detects the positions of electronic components held by the first mounting head 9A and the second mounting head 9B by performing recognition processing on the imaging results of the board recognition camera 11 and the component recognition camera 12. In controlling the component mounting operation by the mounting control processing unit 30a, these position detection results are taken into account and position correction is performed when the components are mounted. The mechanism driving unit 33 is controlled by the mounting control processing unit 30a to drive the board transport mechanism 2, the first component supply unit 4A, the second component supply unit 4B, the Y-axis moving table 7, the first X-axis moving table 8A, the second X-axis moving table 8B, the first mounting head 9A, the second mounting head 9B, and the component mounting mechanism and door lock unit 29a. In controlling the mechanism drive unit 33 by the control unit 30, the access permission processing unit 30b controls the door 29 to be unlocked by the door lock unit 29a only when the drawer unit 28 is at the component supply position 5a near the upper end and blocks communication between the inside of the tray feeder 5 and the head movement space in which the mounting heads 9A and 9B move, by controlling the drawer unit 28.

The input unit 34 is an input device such as a touch panel switch or a keyboard, and is used by the operator to input operation commands and various data. These operation commands include input commands to disable the first tray supply mechanism 5A and the second tray supply mechanism 5B, and to open the door 29. The display unit 35 is a display panel such as a liquid crystal display, and displays a guide screen and various notification screens when inputting data using the input unit 34.

The component mounting device 1 is configured as described above. Below, with reference to Figures 6 and 7, a component mounting method will be described in which the component mounting device 1 is used to pick up electronic components from the first component supply unit 4A by the first mounting head 9A and mount the electronic components on the board 3 transported by the board transport mechanism 2.

When the component mounting work starts, first, in the first component supply unit 4A, the tray 18 storing the electronic components of the component type corresponding to the mounting work of the board 3 to be mounted is placed in the first tray supply mechanism 5A and the second tray supply mechanism 5B. Next, the component mounting work starts, and the first mounting head 9A takes out the electronic components from the tray 18 on the pallet 16 taken out from the first tray supply mechanism 5A and the second tray supply mechanism 5B, and transfers and mounts them on the board 3. At this time, in the first tray supply mechanism 5A, the drawer 28 moves up and down in the internal space PS in the tray feeder 5 to draw the pallet 16 from the tray storage unit 5b, so that the access permission processing unit 30b locks the door 29 with the door lock unit 29a, so that the door 29 is always prohibited from opening. Therefore, the worker cannot access the tray storage unit 5b for work, and the unsafe act of the worker entering the head movement space while the first mounting head 9A is operating is completely eliminated.

In the process of continuing this component mounting work, there may be cases where an operator needs to open door 29 and access one of the tray supply mechanisms to replenish components when they run out, or to perform pre-setup changes to produce the next type of board.

In the component mounting device 1, only the tray supply mechanism that needs to be accessed is stopped, and the other side remains the target for component removal by the first mounting head 9A. That is, for example, when the magazine 17 needs to be replaced in the second tray supply mechanism 5B, as shown in FIG. 6, the door 29 of the first tray supply mechanism 5A is kept closed and the first mounting head 9A continues to target components for removal, and the door 29 of the second tray supply mechanism 5B is opened.

As shown in FIG. 7, the door 29 can be opened by positioning the drawer 28 at the component supply position 5a near the upper end of the tray storage section 5b. That is, when the worker issues an instruction from the input section 34 to obtain permission to open the door 29, the control section 30 drives and controls the motor 26 to raise the drawer 28. The drawer 28 rises to the component supply position 5a, blocking the connection between the internal space PS of the tray feeder 5 and the head movement space in which the first mounting head 9A moves. As a result, even if the worker inserts his/her hand into the internal space PS of the tray storage section 5b, the hand will not enter the head movement space where it may come into contact with the first mounting head 9A.

When the drawer unit 28 is located at the part supply position 5a, the access permission processing unit 30b causes the door lock unit 29a to unlock the door 29. The display unit 35 displays that the door 29 has been unlocked.

When an operator opens the door 29, the first detection unit S3 detects that the door 29 has been opened and cuts off power to the valve. This closes the valve of the actuator 63 and cuts off the supply of fluid to the cylinder 81. The spring inside the cylinder 81 moves the piston rod 81a outward, causing the claw portion 75 to rotate and lock the rotation of the feed screw 27.

The lock mechanism 61 locks the rotation of the feed screw 27 of the lift mechanism 20, so the drawer section 28 does not come down. This prevents the drawer section 28 from coming down and touching the worker's hand while the worker is replacing the magazine 17 in which the tray 18 is stored, so the worker can perform the replacement work with peace of mind. When the worker instructs the control unit 30 to open the door 29 from the input unit 34, the control unit 30 may drive and control the motor 26 to raise the drawer section 28 to the component supply position 5a, and first lock the rotation of the feed screw 27 of the lift mechanism 20 by the lock mechanism 61. Next, the access permission processing unit 30b may confirm that the feed screw 27 is locked based on the detection result of the second detection unit 77, and then have the door lock unit 29a unlock the door 29.

In addition, even if the belt 55 breaks during replacement work, the rotation of the feed screw 27 is locked, so the drawer section 28 will not drop and hit the worker's hand. Even when replacing the belt 55 with the door 29 open, the drawer section 28 can be prevented from dropping, ensuring the safety of the worker.

When the worker closes the door 29 after replacing the magazine 17 containing the tray 18, the first detection unit S3 detects that the door is closed and sends a detection signal to the control unit 30. Based on this detection result, the control unit 30 energizes the valve of the actuator 63, which operates the valve and supplies fluid to the cylinder 81. This moves the piston rod 81a into the cylinder 81 and rotates the claw portion 75 so as to disengage from the gear 76, releasing the lock. The rotation of the claw portion 75 causes the segment 75a to be detected by the second detection unit 77, which then sends a detection signal to the control unit 30. This causes the control unit 30 to recognize that the lock mechanism 61 has been released, energize the motor 26, and resume driving the lift mechanism 20. In addition, when the worker inputs an instruction to the control unit 30 to "complete work" after replacing the magazine 17 via the input unit 34 of the component mounting device 1 or the operation unit of the tray feeder 5, the control unit 30 may energize the valve of the actuator 63 and release the lock.

According to the embodiment, a component mounting device 1 that mounts electronic components on a substrate 3 includes a tray feeder 5 that supplies a tray 18 storing electronic components to a component supply position 5a, and a unit mounting head 10 that removes electronic components from the tray 18 and mounts them on the substrate 3. The tray feeder 5 includes a tray storage section 5b that stores a plurality of trays 18 arranged vertically, and a drawer section 28 that draws the trays 18 from the tray storage section 5b to their respective drawer positions Pu in the front internal space PS. The tray feeder 5 further includes a lifting mechanism 20 that raises and lowers the drawer section 28 between the drawer positions Pu of the respective trays 18 and the component supply position 5a that is higher than the drawer position of the highest tray 18, and a door 29 that allows access to the tray storage section 5b from the outside. The tray feeder 5 further includes a locking mechanism 61 that stops the drawer section 28 from descending when the door 29 is open.

With these configurations, when the door 29 is open, the locking mechanism 61 stops the lifting mechanism 20 from driving (the feed screw 27 from rotating) so that the drawer section 28 moves down, preventing the tray storage section 5b from moving down and coming into contact with the worker's hand while the worker is replacing the tray 18.

In addition, in a tray feeder 5 having multiple tray supply mechanisms, the door 29 of one of the tray supply mechanisms is unlocked and opened to perform the magazine 17 replacement work for the tray storage section 5b, while in another tray supply mechanism, the pallet 16 is pulled out of the tray storage section 5b by the pull-out section 28 and moved to the component supply position 5a for component removal by the first mounting head 9A.

As a result, in component mounting including component supply by the tray feeder 5, the setup work for the production of the next board type can be started without waiting for the completion of the ongoing component mounting work. Therefore, even when it is necessary to frequently repeat the setup work associated with switching between multiple board types, it is possible to improve productivity by minimizing the equipment downtime associated with switching between types, and ensure safety when performing the setup work while the equipment is in operation.

Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various modifications and variations will be apparent to those skilled in the art. Such modifications and variations are to be understood as being included within the scope of the present disclosure as defined by the appended claims, unless they deviate therefrom. In addition, changes in the combination and order of elements in each embodiment may be made without departing from the scope and spirit of the present disclosure.

(1) In the above embodiment, the locking mechanism 61 uses the ratchet mechanism 74 to lock the drive of the lifting mechanism 20, but this is not limited to the above. Instead of the ratchet mechanism 74, a pin or an electromagnetic brake may be used to lock the feed screw 27 so that it does not move.

(2) In the above embodiment, the driving force of the motor 26 is transmitted to the feed screw 27 via the power transmission mechanism 50, but this is not limited to the above. The motor 26 and the feed screw 27 may be directly connected. Even in this case, the lock mechanism 61 can lock the rotation of the feed screw 27 in addition to the brake function of the motor 26, thereby improving the safety of the component mounting device 1.

(3) In the above embodiment, the locking mechanism 61 drives the actuator 63 with a fluid to lock the rotation of the feed screw 27 based on the detection result by the first detection unit S3 that the door 29 is open, but this is not limited to the above. The rotation of the feed screw 27 may be locked in response to the opening and closing of the door 29 by linking the ratchet mechanism 74 with a link mechanism.

(4) In the above embodiment, the component supply position 5a and the position from which the first mounting head 9A removes the component are the same position, but this is not limited to this. The position from which the first mounting head 9A removes the component may be the position to which the drawer 28 moves the tray 18 forward after the lifting mechanism 20 raises the drawer 28 to the component supply position 5a.

In addition, any of the various embodiments and modifications described above can be appropriately combined to achieve the effects of each.

The component mounting device disclosed herein can be applied to component mounting devices in which a worker replaces trays containing components.

REFERENCE SIGNS LIST 1 Component mounting device 2 Board transport mechanism 3 Board 4A First component supply section 4B Second component supply section 5 Tray feeder 5A First tray supply mechanism 5B Second tray supply mechanism 5a Component supply position 5b Tray storage section 5c Discharge section 5d Supply section 6 Tape feeder 7 Y-axis moving table 8A First X-axis moving table 8B Second X-axis moving table 9A First mounting head 9B Second mounting head 10 Unit mounting head 10a Suction nozzle 11 Board recognition camera 12 Component recognition camera 13 Cart 14 Supply reel 15 Carrier tape 16 Pallet 17 Magazine 18 Tray 20 Lifting mechanism 22 Frame 25 Frame 26 Motor 27 Feed screw 28 Drawer section 29 Door 29a Door lock section 30 Control section 30a Mounting control processing unit 30b Access permission processing unit 31 Memory unit 31a Mounting data 31b Part storage data 32 Recognition processing unit 33 Mechanism driving unit 34 Input unit 35 Display unit 50 Power transmission mechanism 51 First pulley 53 Second pulley 55 Belt 61 Locking mechanism 63 Actuator 65 First movable member 67 Second movable member 69 Rotating shaft 71 Bearing 73 Bearing 74 Ratchet mechanism 75 Claw portion 75a Segment 76 Gear 77 Second detection unit 81 Cylinder 81a Piston rod PS Internal space S3, S4 First detection unit

Claims (7)

A component mounting apparatus for mounting electronic components on a substrate, comprising:
a tray feeder that supplies the tray storing the electronic components to a component supply position;
a mounting head that picks up the electronic components from the tray and mounts them on a substrate,
The tray feeder comprises:
a tray storage section that stores a plurality of the trays in a vertical arrangement;
a drawer that draws the tray from the tray housing to a respective drawer position in a front internal space;
a lifting mechanism having a motor for lifting the drawer between a drawer position of each tray and the component supply position that is higher than the drawer position of the highest tray;
a door that allows access to the tray storage section from the outside;
a locking mechanism that prevents the drawer from descending when the door is open;
A first detection unit that detects whether the door is open or closed ;
a control unit that instructs the lock mechanism to lock the drive of the lifting mechanism based on a detection result that the door is open by the first detection unit;
a door lock unit that locks the door to maintain the door in a closed state,
The locking mechanism is different from the brake of the motor.
the control unit controls the motor to move the drawer unit to the component supply position, and causes the door lock unit to unlock the door. The lifting mechanism includes:
A first pulley connected to the motor;
A feed screw connected to the lead-out portion;
A second pulley connected to the feed screw;
A belt wound around the first pulley and the second pulley.
The component mounting apparatus according to claim 1 . The first pulley is connected to a lower end of the motor,
The second pulley is connected to a lower end of the feed screw,
The motor and the feed screw are disposed above and in parallel with the belt.
The component mounting apparatus according to claim 2 . The locking mechanism stops the feed screw from rotating so that the drawer portion is lowered.
The component mounting apparatus according to claim 2 or 3 . The locking mechanism has a ratchet mechanism that stops rotation of the feed screw.
The component mounting apparatus according to claim 4 . A component mounting apparatus for mounting electronic components on a substrate, comprising:
a tray feeder that supplies the tray storing the electronic components to a component supply position;
a mounting head that picks up the electronic components from the tray and mounts them on a substrate,
The tray feeder comprises:
a tray storage section that stores a plurality of the trays in a vertical arrangement;
a drawer that draws the tray from the tray housing to a respective drawer position in a front internal space;
a lifting mechanism having a motor for lifting the drawer between a drawer position of each tray and the component supply position that is higher than the drawer position of the highest tray;
a door that allows access to the tray storage section from the outside;
a locking mechanism that prevents the drawer from descending when the door is open,
The lifting mechanism includes:
A first pulley connected to the motor;
A feed screw connected to the lead-out portion;
A second pulley connected to the feed screw;
a belt wound around the first pulley and the second pulley,
The locking mechanism has a ratchet mechanism that stops the rotation of the feed screw, and stops the rotation of the feed screw so that the drawer portion descends.
Component mounting equipment. The first pulley is connected to a lower end of the motor,
The second pulley is connected to a lower end of the feed screw,
The motor and the feed screw are disposed above and in parallel with the belt.
The component mounting apparatus according to claim 6 .

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