JP2003101295A - Component mounter and method for mounting component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component mounter and a mounting method in which the accuracy of mounting position of a component and the suction rate thereof are enhanced by eliminating the rattling (lateral deflection) of a nozzle in a nozzle projection mechanism. SOLUTION: A nozzle unit 60 is provided with a nozzle restriction mechanism for pressing a nozzle 35 projecting from a nozzle unit 60 in the direction perpendicular to the axis thereof in order to eliminate rattling of the nozzle by operating the nozzle restriction mechanism at the time of sucking, recognizing the attitude, or mounting a component 11. Restriction of the nozzle 35 is released when the nozzle 35 rotates (spin) in order to correct the angle of the sucked component 11, for example. The nozzle restriction mechanism may be constructed to clamp the nozzle 35 from the opposite sides in the axial direction by means of a pair of nozzle retainers 61, or to press the nozzle 35 in one direction of a guide hole 56 by means of one nozzle retainer 61. In the latter case, a nozzle lock bar 72 for sustaining the nozzle 35 in contained state may be provided with that function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting apparatus and a component mounting method for continuously mounting components such as electronic components on a circuit formed body such as an electronic circuit board.

[0002]

2. Description of the Related Art FIG. 7 shows an example of main components of a conventional component mounting apparatus. In the figure, a component mounting apparatus 1 includes a component supply unit 1 for supplying a component 11 such as an electronic component.
0, a circuit-formed body holding portion 20 that carries in and holds the circuit-formed body 21 such as an electronic circuit board, and a mounting head 30 that takes out the component 11 from the component supply portion 10 and mounts it at the mounting position of the circuit-formed body 21. And a recognition device 40 for recognizing the holding state of the component 11 held by the mounting head 30 and a control device 45 for controlling the movement of the entire component mounting device 1.

Of these, in the component supply section 10, a plurality of component supply devices 13 are arranged side by side on a movable table 12, and a drive mechanism 14 such as a motor reciprocates the movable table 12 in the X direction in the figure. The reel 15 loaded in each component supply device 13 is wound with a tape containing a large number of components 11 at predetermined intervals, and the components 11 contained in this tape are sequentially drawn to a component supply position 16. . Each reel 15 stores different parts for each reel. Each component supply device 13 is moved by the movable table 12, and the component supply device 13 loaded with a predetermined reel 15 is positioned at the component removal position 16 according to the order of the components to be mounted.

In the mounting head 30, the driving force from the driving mechanism 31 is transmitted through the speed reducer 32 to the index device 33.
Be transmitted to. The index device 33 converts continuous rotation of the input shaft 34 transmitted from the speed reducer 32 into intermittent rotational movement of the mounting head (rotary body) 30. Around the mounting head 30, a plurality of nozzles 35 are arranged at equal intervals. Each nozzle 35 can move up and down in the Z direction in the drawing and rotate about the Z axis (rotation), and further rotate (revolve) around the outer circumference of the mounting head 30 with intermittent rotation of the mounting head 30.

The circuit-formed body holding portion 20 is a component mounting apparatus 1
The circuit-formed body 21 carried in is conveyed to a position where components can be mounted, and train-holding is performed. The circuit-formed body holding unit 20 has X
The axis drive mechanism 22 and the Y axis drive mechanism 23 are connected to each other, and the circuit forming body 21 is moved to an arbitrary position in the horizontal plane along the X axis direction and the Y axis direction and positioned.

In the operation of the component mounting apparatus 1 configured as described above, the component supply device 13 loaded with the reel 15 containing the components to be mounted is moved by the movable mechanism 12 driven by the drive mechanism 14. The component supply position 16 is set. The nozzle 35 that has moved to just above the component supply position 16 by the intermittent rotation motion of the mounting head 30 then descends, and the negative pressure introduced into the nozzle 35 causes the component 1 to move.
Adsorb 1 The nozzle 35 then moves up and conveys the suction-held component 11 by intermittent rotation motion in the direction indicated by arrow 36. The nozzle 35 is positioned directly above the image pickup device 40 at one of the stop positions in this conveyance process. The imaging device 40 captures the image of the component 11 sucked and held by the nozzle 35. The captured image is used by the recognition device 41 to analyze the suction state of the component,
Based on the analysis result, the control device 45 commands the position correction and the angle correction of the component 11. By this correction, the position and the mounting angle of the sucked component 11 with respect to the circuit forming body 21 are adjusted.

Due to the intermittent rotary motion of the mounting head 30, the nozzle 35 sucking and holding the component 11 further rotates (revolves).
Then, it stops at the component mounting position facing the circuit forming body 21. During this rotation (revolution), the nozzle 35 rotates (spins).
Then, the mounting angle of the suction component 11 is corrected. Circuit forming body holding portion 2 for holding the circuit forming body 21 on which the component 11 is mounted
0 corrects the position of the circuit forming body 21 by controlling the X-axis drive mechanism 22 and the Y-axis drive mechanism 23 by the control device 45,
The preset component mounting position is located directly below the nozzle 35. Then, the nozzle 35 sucking the component 11 descends to mount the component 11 at a predetermined mounting position of the circuit forming body 21. After that, the nozzle 35 rises, and the mounting head 3
It moves to the suction position of the next component by the intermittent rotation motion of 0.

By the above series of operations, one component 11
Is completed. In general, since the plurality of components 11 are mounted on the circuit forming body 21, the mounting operation described above is repeated according to a predetermined mounting order (according to the NC program).

Each of the nozzles 35 shown in FIG. 7 is stored and held in a nozzle holding device called a nozzle unit. A plurality of types of nozzles 35 are usually stored in each nozzle unit so that various parts having different sizes and shapes can be sucked.

The structure of such a nozzle unit is shown in FIG.
It shows in (a). In this figure, the nozzle unit 50 stores five nozzles 35. Of the plurality of nozzles 35, only the nozzle 35a selected for sucking the next component projects downward, and the other nozzles 35 are stored in the nozzle unit 50. The number of nozzles 35 stored in one nozzle unit 50 can be arbitrarily set depending on the size of the nozzle unit 50, the type of components to be sucked, and the like. Nozzle 35 according to the parts to be sucked
The nozzle unit 50 is provided with a projecting / storing mechanism for projecting only the selected nozzle 35a downward and retaining the remaining nozzles 35 inside.

FIG. 8B shows an example of the projecting / storing mechanism. In the figure, each nozzle 35 has a spring 51.
Therefore, the urging force is always applied downward. In addition, a nozzle lock bar 52 is arranged at a side portion of each nozzle 35 so as to face each other along the longitudinal direction thereof. Each nozzle 35
Is provided with a nozzle side claw 37, and a nozzle lock bar 52 facing the nozzle side claw 37 is provided with a lock bar side claw 53, respectively.
In the stored nozzle 35 shown on the left side of FIG. 8B, the nozzle side claw 37 and the lock bar side claw 53 are engaged,
As a result, the nozzle lock bar 52 locks the nozzle 35 in the storage position.

On the other hand, regarding the other nozzle 35a shown on the right side of FIG. 8B, the nozzle / lock bar 52a is rotated by the actuator 55 such as a solenoid.
It rotates counterclockwise around. Therefore, the engagement between the nozzle side claw 37 and the lock bar side claw 53 is released, and the nozzle 35a projects below the nozzle unit 50 through the guide hole 56 by the biasing force of the spring 51. The protruding nozzle 35a is the nozzle 35 selected corresponding to the component to be sucked. The nozzle side claw 37 abuts on one end surface of the guide hole 56 and plays a role of a stopper when the nozzle 35 projects. When the protruding nozzle 35a is stored in the nozzle unit 50 after the components are mounted, a cam (not shown) provided outside pushes up the nozzle 35a to engage the nozzle side claw 37 and the lock bar side claw 53, and the nozzle 35a is locked in the storage position.

[0013]

However, the above-described component mounting apparatus 1 has a problem. As shown in FIG. 8B, a certain clearance 57 is left between the nozzle 35 a and the guide hole 56 in order to ensure the smooth movement of the nozzle 35 in the guide hole 56. However, if the clearance 57 is too large, the nozzle 35a laterally shakes in the guide hole 56. This lateral shake is caused by the adsorption of the component 11
It adversely affects the accuracy of recognition and implementation. Conversely, if the clearance 57 is too small, the selected nozzle 35
While a is protruding, it is locked in the guide hole 56, and a situation in which it cannot completely protrude occurs. Further, when the nozzle 35a is locked, the nozzle 35a does not protrude to a required length, which causes a suction failure of the component 11. Alternatively, the resistance when the nozzle 35a protrudes increases, and it takes a long time to protrude, which reduces the takt time. Therefore, it is extremely important to set the clearance 57 between the nozzle 35a and the guide hole 56 to an appropriate value.

The nozzle 35 is removed from the nozzle unit 50 for cleaning and the like after a certain period of use,
After the processing, it is reattached to the nozzle unit 50. that time,
The combination of the nozzle 35 and the nozzle unit 50 and the combination of the nozzle 35 and the guide hole 56 are changed, and as a result, the nozzle 35 and the clearance 57 corresponding thereto are changed.
The relationship with may change. Therefore, each nozzle 35
It is difficult to set an appropriate clearance 57 for the.

By the way, in order to allow the nozzle 35 to smoothly project, one nozzle is provided between the nozzle 35 and the guide hole 56.
A clearance 57 of 0 μm to 20 μm is required. The length of the nozzle 35 protruding from the nozzle unit 50 is usually about 10 mm. For this reason, even if the clearance 57 is correctly set within the above range, the tip of the nozzle 35 sucking the component 11 has 6
Lateral shake may occur from 0 μm to 70 μm. On the other hand, with the miniaturization of electronic components, further improvement in component mounting accuracy is required.

Therefore, an object of the present invention is to enable a smooth operation of the nozzle when the nozzle stored in the nozzle unit of the component mounting apparatus and selected corresponding to the mounted component protrudes. An object of the present invention is to provide a component mounting apparatus and a component mounting method capable of eliminating rattling (lateral shake) of a protruding nozzle and realizing highly accurate component mounting.

[0017]

SUMMARY OF THE INVENTION According to the present invention, a clearance required when the nozzle projects is provided between the outer diameter of the nozzle and the inner diameter of the guide hole, while eliminating rattling of the nozzle. The above problem is solved by providing a nozzle holding mechanism in the nozzle unit, and specifically includes the following contents.

That is, the present invention according to claim 1 has a nozzle unit for accommodating a plurality of nozzles, a nozzle selected from the nozzle unit is projected through a guide hole, and the component supply section is provided by the projected nozzle. A component mounting device for picking up a component from a component and mounting the component at a mounting position of a circuit forming body, wherein the nozzle unit includes a nozzle restraint mechanism for preventing rattling of the nozzle in a protruding state of the nozzle. The present invention relates to a component mounting device characterized in that By using the nozzle restraint mechanism, the rattling (lateral wobbling) of the nozzle caused by the clearance between the guide hole for guiding the projecting nozzle and the nozzle is eliminated, and high-precision component mounting is realized.

In the component mounting apparatus according to the present invention as defined in claim 2, the nozzle restraining mechanism comprises a pair of nozzle retainers for sandwiching and restraining side surfaces of the projecting nozzle from both sides. There is. The nozzle is clamped by a pair of nozzle retainers and restrained to eliminate rattling.

In the component mounting apparatus according to the third aspect of the present invention, the nozzle restraining mechanism is composed of a nozzle retainer for restraining the protruding nozzle by pushing it from one side against the inner wall of the guide hole. I am trying. The guide hole is used to eliminate rattling of the nozzle.

According to a fourth aspect of the present invention, there is provided the component mounting apparatus according to the present invention, wherein the nozzle retainer is also used as a nozzle lock bar for maintaining the nozzle in the retracted state in the nozzle unit. By utilizing the existing nozzle lock bar, the nozzle restraining mechanism is simplified.

According to a fifth aspect of the component mounting apparatus of the present invention, the nozzle restraining mechanism causes the projecting nozzle to move to the inner wall of the guide hole by a spring that provides a biasing force when the nozzle projects. The feature is that it is a mechanism that presses from one direction and restrains. The nozzle restraint mechanism is realized with a simpler structure.

According to a sixth aspect of the present invention, a nozzle selected from a nozzle unit accommodating a plurality of nozzles according to a component to be mounted is projected through a guide hole, and the projecting nozzle is used to eject the component. A component mounting method for performing from picking up to mounting, wherein the protruding nozzle is pressed against the inner wall of the guide hole from one direction or is clamped from two opposite directions to restrain the nozzle from rattling. The present invention relates to a component mounting method that is characterized by prevention. This eliminates rattling due to lateral runout of a protruding nozzle that occurs due to the clearance between the nozzle and the guide hole, and realizes highly accurate component mounting.

A component mounting method according to a seventh aspect of the present invention is characterized in that the restraint state of the nozzle is released when the nozzle is rotated about the axis of the nozzle, which is required for component mounting. There is. It enables the rotation (rotation) of the nozzle required for component mounting.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A component mounting apparatus and a component mounting method according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the structure of a nozzle unit 60 applied to the component mounting apparatus according to this embodiment. The components of the component mounting apparatus other than the illustrated parts are the same as those of the conventional component mounting apparatus described with reference to FIG. 7. Further, in the figure, the same components as those of the conventional component mounting apparatus are designated by the same reference numerals.

In FIG. 1A, the nozzle unit 60
The five nozzles 35 are stored in. The number of nozzles 35 that can be stored in the nozzle unit 60 can be set arbitrarily. 1 selected for picking and mounting components
The nozzle unit 60 is used while the nozzle 35a of the book projects outside the nozzle unit 60 and the other unselected nozzles 35 are stored inside the nozzle unit 60. Specifically, in the nozzle 35 in the storage state shown on the left side of FIG. 1B, the nozzle side claw 37 and the lock bar side claw 53 are engaged with each other, and the nozzle 35 is locked. In the projecting nozzle 35a shown on the right side of the figure, the extension of the actuator 55 causes the nozzle lock bar 52a to rotate counterclockwise to release the engagement of the pawls 37 and 53, and the nozzle 35a is attached with the spring 51. Nozzle unit 60 by power
It projects to the outside below.

Nozzle unit 60 shown in this embodiment
Includes a pair of nozzle retainers 61 that hold the protruding nozzle 35a from both side surfaces. FIG. 1B shows the nozzle 3
One nozzle retainer 61 is shown behind 5a. The other nozzle retainer 61 facing this is arranged at a position (not shown) on the front side of the drawing, and these two nozzle retainers 61 sandwich and position the side surfaces of the protruding nozzle 35a from both sides. .

FIG. 2 schematically shows a state in which the nozzle retainer 61 is viewed obliquely, and FIG. 2A shows a state in which the nozzle 35 is stored in the nozzle unit.
(B) shows a state in which the nozzle 35a is projected from the nozzle unit 60 to the outside, and the side surface of the nozzle 35a is clamped from both sides by a pair of nozzle retainers 61 to be clamped.

FIG. 3 schematically shows the structure of one of the pair of nozzle retainers 61. The other nozzle retainer 61 (not shown) is provided in axial symmetry with respect to the central axis 62 of the nozzle 35 shown by the broken line. The nozzle retainer 61 has a rod-shaped body 6
3, a rotary shaft 64 provided at the central portion in the longitudinal direction of the main body portion 63, a nozzle pressing portion 65 provided at a position facing the nozzle 35 at one end in the longitudinal direction, and a nozzle pressing portion 65 on the back side. With a biasing device arranged. The bias device is composed of a pair of bias units 66 and 67 in the illustrated example. The nozzle pressing portion 65 is preferably made of a hard elastic body such as vibration absorbing rubber.

In the present embodiment, each of the bias units 66 and 67 is composed of a combination of an electromagnet and a permanent magnet facing the electromagnet. One of them is the main body portion 63, and the other is the nozzle unit 60. (See FIG. 1). Also, each bias unit 66,
The electromagnets 67 are electrically connected to a power supply device (not shown). The circuit of the power supply device and the electrical connection with each electromagnet are connected to either one of the bias units 66 and 6.
When the seventh electromagnet attracts the corresponding permanent magnet, the other electromagnet repels the corresponding permanent magnet.

The bias units 66 and 67 can be constructed using devices other than the combination of electromagnets and permanent magnets. For example, one of the bias units 66 and 67 is an elastic body such as a set of permanent magnets or a spring that always exerts an attraction action, and the other one is an electromagnet set having a stronger attraction force than the permanent magnet set or spring. And may be. Furthermore, instead of both electromagnet sets, an actuator driven by a solenoid, a motor, an air cylinder that uses positive or negative pressure, or the like may be used.

Returning to FIG. 1B, when the nozzle unit 60 configured as described above operates, the nozzle 35a corresponding to the component to be mounted is selected, and the nozzle 35a is selected.
Nozzle lock bar 52a that locks the
Rotates according to a command from the control device 45. As a result, the engagement between the nozzle side claw 37 and the lock bar side claw 53 is released, and the nozzle 35a projects downward from the nozzle unit 60 by the biasing force of the spring 51. Then, in accordance with a command from the control device 45, the bias units 66 and 67 provided in the pair of nozzle pressers 61 are energized to operate the nozzle pressers 61, and the nozzle pressing portions 65 cause the nozzles 35a to operate.
The side surfaces of the nozzle are clamped from both sides, and the protruding nozzle 35a is constrained to eliminate rattling.

After the projecting nozzle 35a completes suction, recognition, and mounting of the component 11, contrary to this operation, first, the pressing force of the nozzle presser 61 is released, and a cam provided outside (see FIG. (Not shown) abuts on the tip of the nozzle 35a and pushes it up, and the nozzle side claw 37 and the lock bar side claw 53 engage with each other to lock the nozzle 35a in the storage position.

In the present embodiment, since the protruding nozzle 35a is maintained in a state of being sandwiched at a fixed position from both sides by the pair of nozzle retainers 61, when the component 11 is sucked by the nozzle 35a, the suction is performed. When the holding state is recognized and the mounting operation is performed, the nozzle 35a is not shaken by the lateral shake, and the suction, the recognition, and the mounting operation can be performed with high positional accuracy. Further, since the nozzle 35 a is sandwiched by the nozzle retainer 61, the guide hole 56
Therefore, it is not necessary to control the rattling of the nozzle 35a.
Therefore, the clearance 57 can be sufficiently maintained between the nozzle 35a and the guide hole 56, the occurrence of lock of the nozzle 35a in the guide hole 56 is avoided, and the nozzle 35 is prevented.
It is possible to reliably eliminate the component suction failure due to a.

Next, a component mounting apparatus and a component mounting method according to a second embodiment of the present invention, which is an alternative to the above-described first embodiment, will be described with reference to the drawings. The first alternative according to the present embodiment is a pair of nozzle retainers 6
Instead of one, only one nozzle retainer 61 is used, and the nozzle 35a is pressed from one direction toward the inner wall of the guide hole 56 to eliminate the rattling. 1 in this case
The structure of one nozzle presser 61 can be the same as that of the nozzle presser 61 according to the first embodiment shown in FIG.

During operation of the component mounting apparatus using the nozzle unit constructed as described above, after the nozzle 35a is selected and protrudes, the bias units 66 and 67 provided on the nozzle presser 61 are instructed by the controller 45. It is energized. As a result, the nozzle presser 61 operates to move the nozzle 35a protruding by the nozzle pressing portion 65 to the guide hole 56.
Press from one direction toward the inner wall of. The rattling of the nozzle 35a in the protruding state can be eliminated by the constraint due to this pressing force. The operation of re-storing the projecting nozzle 35a is the same as in the case of the first embodiment.

Next, FIG. 4 shows a second alternative nozzle unit 70 according to the present embodiment. In the nozzle storage state shown on the left side of the drawing, the nozzle lock bar 72
Is provided with a lock bar side claw 73 on one side in the longitudinal direction with respect to the rotation shaft 74. The lock bar side claw 73 engages with the nozzle side claw 37 to lock the nozzle 35 in the retracted state. A nozzle pressing portion 75 is provided on the opposite side of the rotary shaft 74 from the lock bar side claw 73 in the longitudinal direction so as to face the nozzle 35. In the nozzle retracted state, the nozzle pressing portion 75 is maintained at a position away from the nozzle 35. An actuator 76 such as a solenoid is provided at one end (upper end side in the illustrated example) of the nozzle lock bar 72 in the longitudinal direction. The upper portion of the lock bar 72 is pressed and maintained in the direction shown by the arrow 77. The actuator 76 may be another drive source such as an electromagnet, a motor, or an air cylinder.

On the other hand, when the nozzle 35a is selected and protrudes in the nozzle protruding state shown on the right side of FIG. 4, the actuator 76 operates according to a command from the control device 45, and the nozzle lock bar 72a moves in the direction of the arrow about the rotary shaft 74. It rotates clockwise as shown at 79. As a result, the engagement between the lock bar side claw 73 and the nozzle side claw 37 is released, and the nozzle 35
a is projected downward from the nozzle unit 70 by the urging force of the spring 51. After that, the nozzle pressing portion 75 of the nozzle lock bar 72a that is further rotated by the operation of the actuator 76 causes the nozzle 35a that has completed the protruding operation.
Is pressed from its side surface, and the nozzle 35a is inserted into the guide hole 56.
It is pressed against the inner wall of the vehicle from one direction to restrain it. This restraining operation can eliminate rattling due to lateral shake of the nozzle 35a. In the example shown in the drawing, a stopper 38 that restricts the amount of protrusion when the nozzle 35a protrudes is attached to each nozzle 35 separately from the nozzle side claw 37.

When the nozzle 35a is pressed, the timing of pressing the nozzle 35a is controlled so that the nozzle 35a which is still in the middle of projection is not restricted by the nozzle pressing portion 75. Alternatively, the operation of the actuator 76 may be a double action type. In this case, both claws 37, 7
Nozzle lock bar 7 to the position where the engagement state of 3 is released
After this, the rotation is stopped once, and then the nozzle 3
After the completion of the projecting operation of 5a, the actuator 76 operates again to press the nozzle pressing portion 75 against the nozzle 35a.

Next, FIG. 5 shows a third alternative nozzle unit 80 according to the present embodiment. In the figure, the spring 81 for projecting the nozzle 35 is provided so that the biasing force thereof acts at an angle with respect to the projecting direction of the nozzle 35 as indicated by an arrow 82. Due to the biasing force of the spring 81 in the inclination direction, a component force of the biasing force in the lateral direction indicated by the arrow 83 is generated on the protruding nozzle 35a shown on the right side of the drawing. This lateral component force is applied to the nozzle 35a.
Of the nozzle 35a, the nozzle 35a is biased and restrained in the guide hole 56 in a state of being inclined in a specific direction. As a result, rattling due to the lateral shake of the protruding nozzle 35a can be eliminated.

At this time, the component force of the lateral urging force indicated by the arrow 83 is preferably suppressed to the minimum necessary amount in order to eliminate the rattling of the nozzle 35a. Specifically, the lateral urging force is set so that the nozzle 35a is not locked by the guide hole 56 when protruding and the nozzle 35a can rotate as required (θ rotation). A spring 8 for pressing the nozzle 35a in one direction against the inner wall of the nozzle guide hole 56.
Since the external force acting in the direction of pushing back the component force 83 of 1 does not act, the component force 83 in the horizontal direction can be suppressed low. As a result of keeping the lateral force component 83 low, the nozzle 35a can be rotated even in the restrained state.

Next, the operation when the nozzle restraining mechanism according to the present invention is applied to a rotary type component mounting apparatus will be described. FIG. 6 is a view of each station layout of the mounting head 30 having the nozzle unit 60 (see FIG. 1) described in the first embodiment, as viewed from above. Due to the intermittent rotation movement of the mounting head 30, the mounting head 30 having the plurality of nozzle units 60 mounted thereon intermittently rotates in the direction indicated by the arrow 85. Five nozzles 35 are stored inside each nozzle unit 60.

First, the nozzle presser 61 (see FIG. 1) which the control device 45 (see FIG. 7) restrains the nozzle 35 is attached to the nozzle unit 60 immediately after the component 11 is mounted in the component mounting station 86. Issue a command to release. As a result, the nozzle 35a that is rotating (revolving) in the restricted state within the movement range indicated by the solid line arrow 87 is switched to rotation in the nozzle release state within the movement range indicated by the broken line arrow 88. The nozzle unit 60 in the nozzle released state moves to the nozzle selection station 89, and the nozzle 35 that has finished component mounting is stored by a cam operation from the outside, and the nozzle 35 selected for the next component suction is stored. Be projected.

After the above nozzle selection is completed, the control device 45 issues a command to the nozzle retainer 61 to restrain the newly projected nozzle 35, and the newly projected nozzle 3
5 is again in the restrained state within the movement range indicated by the solid arrow 91. In this restrained state, the nozzle unit 60 moves to the component take-out station 92 where the component 11 to be mounted next is adsorbed and taken out.

In order to adjust the picked-up component 11 to the mounting angle, the control device 45 causes the nozzle retainer 61 to move the nozzle 35.
Is issued to once release the restraint of the nozzle 35 within the movement range indicated by the broken arrow 93. During this time, part 1
The nozzle 35 that has picked up 1 rotates (rotates) for angle correction to match the picked-up component 11 to the mounting angle.
After the nozzle rotation is completed, the controller 45 is prepared for the next recognition operation.
Issues a command to the nozzle retainer 61 again to restrain the nozzle 35. The nozzle 35, which has been restrained within the movement range indicated by the solid arrow 94, moves to the component recognition station 95, where it is stopped and the posture of the component 11 suction-held is recognized.

The control unit 45 calculates the correction amounts of the component mounting position and the mounting angle based on the component recognition result. In order to execute this angle correction, the controller 45 causes the nozzle holder 6
The nozzle 35 is instructed to release the nozzle, and the nozzle 35 switches to the released state within the movement range indicated by the broken arrow 96.
In this state, the nozzle 35 rotates (rotates) by the correction angle.
Then, the component 11 is positionally corrected to the mounting angle.

Next, in order to start the mounting operation, the control device 45
Outputs a command to restrain the nozzle 35 to the nozzle presser 61, and the nozzle 35 is restrained in the movement range shown by the solid arrow 87. In the restrained state, the nozzle 35 moves to the component mounting station 86 and stops, and then the component 11
Implement. In the rotary type component mounting apparatus, the above operation is continuously continued by the intermittent rotation motion of the mounting head 30, and the components are sequentially mounted.

In the drawing, the mounting head 30 is shown with four nozzle units 60, but in reality, a larger number of nozzle units 60, such as 16, are provided.
Can be installed. Each attached nozzle unit 60
Then, the above-mentioned operations are simultaneously executed in parallel with the intermittent rotation movement of the mounting head 30.

The switching operation between the restrained state and the released state of the nozzle shown in FIG. 6 is an example thereof, and the number and timing of this switching can be arbitrarily set depending on the type and structure of the component mounting apparatus. Can be set. Further, although the nozzle unit 60 of the first embodiment according to the present invention is used in FIG. 6, the nozzle units 60, 70 according to the second embodiment can also be used.

The component mounting apparatus having the nozzle restraining mechanism according to each of the embodiments of the present invention has been described above by taking the rotary component mounting apparatus as an example. However, the application of the present invention is applicable to this rotary component mounting apparatus. It is not limited.
Instead of the index device that performs the intermittent rotation motion, the nozzle is also used in other types of component mounting apparatuses such as an XY robot-type component mounting apparatus in which the mounting head on which the nozzle is mounted is planarly transported using an XY robot. The present invention can be similarly applied to a component mounting apparatus having a structure for moving a guide hole.

In each of the above embodiments, the component mounting apparatus has been mainly described, but the present invention is selected from the nozzle units storing a plurality of nozzles according to the components to be mounted. It also includes a component mounting method characterized in that when the nozzles are sequentially projected to mount components, the projected nozzles are restrained to prevent rattling of the nozzles.

[0052]

By implementing the component mounting apparatus or component mounting method according to the present invention, when the nozzles sequentially selected corresponding to the components are projected from the nozzle unit for sequential mounting, the protruding nozzles are restrained. By doing so, rattling (lateral shake) of the nozzle can be prevented, and components can be mounted with high positional accuracy.

In addition, by implementing the component mounting apparatus or component mounting method according to the present invention, the nozzle is placed between the outer diameter of the nozzle and the inner diameter of the guide hole so that the nozzle is not locked when protruding from the nozzle unit. It is possible to provide a sufficient clearance to avoid the component suction failure due to the nozzle, and it is possible to obtain a high component mounting rate and a resulting improvement in the facility operation rate.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a nozzle restraining mechanism according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an outline of main parts of the nozzle restraint mechanism shown in FIG.

FIG. 3 is a perspective view showing details of a nozzle retainer used in the nozzle restraint mechanism shown in FIG.

FIG. 4 is a conceptual diagram showing a nozzle restraining mechanism of another embodiment according to the present invention.

FIG. 5 is a conceptual diagram showing a nozzle restraining mechanism according to still another embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an operation when the nozzle restraining mechanism according to the present invention is mounted on a mounting head.

FIG. 7 is a perspective view showing main components of a component mounting apparatus according to a conventional technique.

8 is a conceptual diagram showing a configuration of a nozzle unit used in the component mounting apparatus shown in FIG.

[Explanation of symbols]

1. Component mounting apparatus, 10. Parts supply unit, 11. Parts, 20. Circuit forming body holding part, 21. Circuit forming body,
30. Component mounting head, 33. Index device,
35. Nozzle, 37. Nozzle side nail, 40. Imaging device, 45. Control device, 50. Nozzle unit, 5
1. Spring, 52. Nozzle lock bar, 53. Lock bar side claw, 55. Actuator, 56. Guide hole 57. Clearance, 60. Nozzle unit, 6
1. Nozzle retainer, 65. Nozzle pressing part, 66, 6
7. Bias unit, 70. Nozzle unit, 7
2. Nozzle lock bar, 73. Lock bar side nail,
75. Nozzle pressing portion, 76. Actuator, 8
0. Nozzle unit, 81. Spring.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeki Imafuku             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Shinichi Nishioka             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 3C007 AS08 DS08 FS01 HS24 HT36                 5E313 AA03 AA11 AA15 CC03 CC07                       CD06 DD13 DD31 EE01 EE02                       EE24 EE25 EE33 EE50 FG10

Claims (7)

[Claims] 1. A nozzle unit for storing a plurality of nozzles, wherein a nozzle selected from the nozzle unit is projected through a guide hole, and the projected nozzle picks up a component from a component supply unit to mount a circuit forming body. A component mounting apparatus for mounting the component at a position, wherein the nozzle unit includes a nozzle restraining mechanism that prevents rattling of the nozzle in a protruding state of the nozzle. 2. The component mounting apparatus according to claim 1, wherein the nozzle restraining mechanism is composed of a pair of nozzle retainers that sandwich and restrain the side surfaces of the protruding nozzle from both sides. 3. The component mounting apparatus according to claim 1, wherein the nozzle restraining mechanism is composed of a nozzle retainer that restrains the protruding nozzle by pushing it against the inner wall of the guide hole from one direction. . 4. The component mounting apparatus according to claim 3, wherein the nozzle retainer also serves as a nozzle lock bar that keeps the nozzle in the retracted state in the nozzle unit. 5. The nozzle restraining mechanism is a mechanism that pushes the protruding nozzle against the inner wall of the guide hole from one side by a spring that provides an urging force when the nozzle protrudes and restrains the nozzle. The component mounting apparatus according to claim 1. 6. A component mounting in which a nozzle selected according to a component to be mounted is projected from a nozzle unit that stores a plurality of nozzles through a guide hole, and the projecting nozzle is used to take out and mount the component. In the method, the projecting nozzle is pressed against the inner wall of the guide hole from one direction, or is clamped and constrained from two opposite directions to prevent rattling of the nozzle. . 7. The component mounting method according to claim 6, wherein the restrained state of the protruding nozzle is released when the nozzle is rotated about the axis of the nozzle, which is required for mounting the component. .