JPH06237097A - Nozzle raising and lowering device of mounting device - Google Patents

Abstract

PURPOSE:To raise and lower each nozzle member respectively by a relatively simple mechanism wherein one driving source and a clutch means are used and to improve operational efficiency during suction and mounting in the mounting device wherein a plurality of nozzle members for part suction are provided to a head unit which is movable at a part supply side and a mounting side. CONSTITUTION:A plurality of nozzle members 20 for part suction are provided to a head unit, and a cam 32 for raising and lowering each nozzle is provided to a cam shaft 31 connected to a serbo-motor 30 as a driving source. Each nozzle member is provided with a rocker arm 33 for raising and lowering the nozzle member in accordance with rotation of a cam, a pivot member 34 constituting a fulcrum part of the rocker arm and a clutch cylinder 35 for displacing the pivot member in accordance with supply and discharge of air pressure to a pressure room provided to a part supporting the pivot member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle raising / lowering device for raising and lowering each nozzle member in a mounting machine in which a head unit is provided with a plurality of nozzle members for adsorbing chip components.

[0002]

2. Description of the Related Art Conventionally, a printed circuit board in which a chip unit such as an electronic component such as an IC is adsorbed from a component supply section and positioned by a head unit having a nozzle member for adsorbing a chip component. A mounting machine that is transferred to the upper side and mounted on a predetermined position of a printed circuit board is generally known. In this mounting machine, the head unit is usually X
It is movable in the axial direction and the Y-axis direction, is equipped with driving means in these directions, and is provided with a nozzle member so as to be able to move up and down and rotate with respect to the head unit.
A driving unit for raising and lowering and rotating the head unit is provided in the head unit, and a negative pressure supply unit for the nozzle member is provided. By controlling the above-mentioned drive means and negative pressure supply means by the control section, the chip component suction and mounting operations are automatically performed.

In this type of mounting machine, it is desirable to equip the head unit with a large number of nozzle members in order to improve the work efficiency of suction and mounting of chip components. In this case, it is required that the raising / lowering operation of each nozzle member can be performed individually. However, if a servo motor or the like for raising / lowering drive is provided for each nozzle member, the head unit becomes large. And increase costs.

Therefore, as disclosed in, for example, Japanese Patent Application Laid-Open No. 4-11799, a single motor is used as a drive source, and a cam shaft rotatably driven by this motor and nozzle members are provided respectively. There is known a device in which a mechanism for raising and lowering a nozzle member is configured with a cam lever that swings with the rotation of a cam shaft, and a lever locking arm that is driven by a solenoid is provided for each cam lever. In this device, the nozzle member is moved up and down by the driving force transmitted through the cam lever, and the lever locking arm can be engaged with and disengaged from the cam lever while the nozzle member is at the rising end position. The stop arm functions as a clutch that switches between a state in which the driving force is blocked (a swing of the cam lever is blocked) and a state in which the driving force is transmitted.

[0005]

According to the conventional device as described above, engagement / disengagement of the lever locking arm (corresponding to ON / OFF of the clutch) with respect to the mechanism for elevating and lowering the nozzle member is performed.
It is possible only when the nozzle member is at the rising end position, but in such a structure, as will be described in detail in Examples, in terms of work efficiency in the case where each nozzle is sequentially operated, There was room for improvement.

In view of such circumstances, the present invention enables a plurality of nozzle members provided in the head unit to be individually lifted and lowered by a relatively simple mechanism using one drive source and clutch means, and the work efficiency is improved. It is an object of the present invention to provide a nozzle elevating device for a mounting machine that can increase the nozzle height.

[0007]

In order to achieve the above object, the present invention comprises a head unit movable between a component supply side and a mounting side, and a nozzle member for adsorbing a chip component is provided on the head unit. In a mounting machine in which a plurality of units are arranged in parallel so that they can be respectively raised and lowered, the cams for raising and lowering each nozzle member are arranged on a cam shaft connected to a drive source, and the nozzle members are respectively attached to the nozzle members. A rocker arm having an action point portion to be engaged and a force point portion to be engaged with the cam, a pivot member forming a fulcrum portion of the rocker arm, and a pressure chamber having a pressure chamber at a portion supporting the pivot member. A clutch cylinder for displacing the pivot member according to supply and discharge of fluid pressure to and from the chamber is provided (Claim 1).

Further, an elastic member is provided above the rocker arm and regulates the rocking amount of the rocker arm, a plunger member for holding the elastic member, and a pressure chamber for supporting the plunger member. A stopper cylinder for displacing the plunger member in a plurality of steps according to supply and discharge of fluid pressure to and from the lever pressure chamber is provided (claim 2).

[0009]

According to the invention described in claim 1, the camshaft is rotationally driven by the drive source in the clutch ON state in which the pivot member is fixed at a predetermined height position by the supply of the fluid pressure to the clutch cylinder. Then, by rocking the rocker arm in accordance therewith, the nozzle member for sucking or mounting the chip component is moved up and down. Further, in the clutch OFF state in which the pivot member is displaced by the discharge of the fluid pressure from the clutch cylinder,
The lifting operation of the nozzle member is substantially stopped. And
Regardless of the operating position of the cam, it is possible to switch between the clutch ON state and the clutch OFF state by supplying / discharging the fluid pressure to / from the clutch cylinder.

According to the second aspect of the invention, in the stopper ON state in which the plunger member is fixed at the predetermined lowered position by the supply of the fluid pressure to the stopper cylinder,
The rocking of the rocker arm is regulated by an elastic body,
In the clutch ON state, a state is set in which the cam and the rocker arm do not come into contact with each other at a predetermined operating position during vertical movement of the cam. By switching the clutch cylinder to the ON state at such a cam operating position, it is possible to prevent the jumping phenomenon (vibration) of the nozzle due to the collision between the force point portion of the rocker arm and the cam. Become.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. 1 and 2 show the structure of the entire mounter according to the first embodiment of the present invention. In these figures, the base 1
Above the conveyor 2 which constitutes the transfer line,
A printed circuit board (not shown) is conveyed on the conveyor 2 and stopped at a predetermined mounting work position.

On the side of the conveyor 2, a parts supply section 3 is provided.
Are arranged. The component supply unit 3 is capable of supplying a large number of types of chip components. For example, a large number of supply tapes 3a wound around a reel are arranged, and each supply tape 3a has an IC and a transistor, respectively. , Chip-like chip parts such as capacitors are housed at predetermined intervals. Then, by a feeding mechanism (not shown), the supply tape 3a is intermittently fed as the chip parts are fed.

A head unit 5 for mounting components is installed above the base 1, and the head unit 5 is mounted on the head unit 5.
Can move in the X-axis direction (direction of the conveyor 2) and in the Y-axis direction (direction orthogonal to the X-axis on the horizontal plane).

That is, a pair of fixed rails 7 extending in the Y-axis direction and a ball screw shaft 8 rotatably driven by a Y-axis servomotor 9 are arranged on the base 1, and the fixed rails 7 are mounted on the fixed rail 7. A head unit support member 11 is arranged in the head unit, and a nut portion 12 provided on the support member 11 is screwed onto the ball screw shaft 8. A guide member 13 extending in the X-axis direction and a ball screw shaft 14 driven by an X-axis servomotor 15 are arranged on the support member 11, and the head unit 5 can be moved on the guide member 13. A nut portion 15 held and provided on the head unit 5 is screwed onto the ball screw shaft 14. Then, the ball screw shaft 8 is rotated by the operation of the Y-axis servomotor 9 to move the support member 11 in the Y-axis direction, and the ball screw shaft 14 is rotated by the operation of the X-axis servomotor 15, so that the head unit is rotated. 5 is a support member 1
It moves in the X-axis direction with respect to 1.

The head unit 5 has a nozzle member 20.
Are arranged in parallel, and eight nozzle members 20 are provided in the illustrated embodiment.

3 to 5 show a specific structure of the nozzle lifting device. As shown in these drawings, each of the nozzle members 20 has a hollow nozzle shaft 21.
The nozzle 22 formed integrally with the nozzle has an opening at its tip. Furthermore, each nozzle member 20 is inserted into a cylindrical housing 23, and is connected to the housing 23 by a spline so as to be movable in the Z-axis direction (vertical direction) and prevented from rotating relatively. There is. Further, each housing 23 is rotatably held by the main body of the head unit 5, so that each nozzle member 20 together with the housing 23 is rotatable about the R axis (nozzle central axis) with respect to the main body of the head unit 5. Has become.

The nozzle forming portion at the tip of each nozzle member 20 projects below the housing 23. The upper portion of each nozzle member 20 projects above the housing 23. At this portion, a rocker arm engaging portion 24 is provided on the outer periphery of the nozzle member 20, and a return spring 25 that biases the nozzle member 20 upward is provided. Equipped. The passage inside the nozzle member 20 is connected to a negative pressure supply unit (not shown) via a switching valve or the like.

Further, in the head unit 5, each Z-axis servomotor 30 is used as a drive source for each nozzle member 20.
And a mechanism for rotating each nozzle member 20 by using one R-axis servomotor 40 as a drive source.

The mechanism for raising and lowering each nozzle member 20 is composed of a cam shaft 31, a rocker arm 33 provided for each nozzle member 20, a pivot member 34 and a clutch cylinder 35. The camshaft 3
1 extends in the nozzle member arrangement direction, is rotatably supported by the main body of the head unit 5, and is connected to the Z-axis servomotor 30 via pulleys 36, 37 and a belt 38. A cam 32 for raising and lowering the nozzle member is provided at a position of the cam shaft 31 corresponding to each nozzle member 20.

Each of the rocker arms 33 has a cam follower 33a, which is in contact with the cam 32 and constitutes a force point portion, at the intermediate portion thereof, and one end side thereof has a rocker arm engagement of the nozzle member 20 as an action point portion. Part 24
Has a pin portion 33b that engages with, and has a connecting portion 33c to the pivot member 34 as a fulcrum portion on the other end side.

The pivot member 34 comprises a shaft body having an upper end connected to the connecting portion 33c of the rocker arm 33, and a piston 34a located inside the clutch cylinder 35 is integrally provided at the lower end portion thereof. . Further, the clutch cylinder 35 has a pressure chamber 35a below the piston 34a, and this pressure chamber 35a is an ON / OF (not shown).
The pressure chamber 3 is connected to the air supply source through the F switching valve.
When air pressure is supplied to 5a, the piston 34a is pushed up to hold the pivot member 34 in the raised position. Further, when the air is discharged from the pressure chamber 35a, the pivot member 34 descends to the lower end of the vertically movable range.

The mechanism for rotating each nozzle member 20 is attached to the drive gear 41 attached to the shaft of the R-axis servomotor 40 and one nozzle member (for example, the rightmost nozzle member in FIGS. 3 and 4) 20. The driven gear 42 is engaged with the driving gear 41, and the belt transmission mechanism 43 between the nozzle member 20 and the other nozzle member 20. The belt transmission mechanism 43 is provided in upper and lower two stages in order to ensure the transmission operation.
45 is wound around a pulley 46 provided on each nozzle member 20, as shown in FIGS. 6 (a) and 6 (b). Thus, the R-axis servomotor 40 causes the gear 41,
One nozzle member 20 is rotationally driven via 42, and the rotation is transmitted to each of the other nozzle members 20.

Further, an encoder 47 for detecting the rotation angle of the nozzle member 20 connected to the R-axis servomotor 40 via the gears 41 and 42 is attached.

The operation of the nozzle lifting device as described above is shown in FIG.
Will be described with reference to.

The head unit 5 is used to supply the parts supply unit 3
When picking up a chip component from the nozzle member 2 with the head unit 5 positioned above the component supply unit 3.
The negative pressure is supplied to 0, and the nozzle member 20 for suctioning the chip component is operated. That is, the clutch cylinder 35 corresponding to the nozzle member 20 is turned on.
(The air pressure is supplied to the pressure chamber 35a), and the Z-axis servomotor 30 is operated, so that the pivot member 34 is in the raised position as shown by the solid line in FIG. Rocker arm 3 with the rotation of
3 swings around the connecting portion 33c with the pivot member 34 as a fulcrum, and accordingly, the nozzle member 20 descends to a predetermined height in the vicinity of the chip component, and after adsorbing the chip component, rises.

When the nozzle member 20 for adsorbing the chip component is moving up and down in this manner, the clutch cylinders 35 corresponding to the other nozzle members 20 are turned off (air pressure is applied from the pressure chamber 35a). The operation is substantially stopped when the clutch cylinder 35 is turned off, that is, the pivot member 34 is displaced to the lowered position as shown by the chain double-dashed line in FIG. In this state, the nozzle member 20 will return the return spring 2
5 hold it in the raised position.

Then, for example, when the chip components are sequentially sucked by each nozzle member 20, the clutch cylinder 35 is turned on and off for each nozzle member 20,
The Z-axis servomotor 30 is repeatedly operated while being sequentially turned off, so that the lifting and lowering operations for picking up the components of the nozzle members 20 are successively performed.

When the component suction by each nozzle member 20 is completed, a process for obtaining the correction amount of the mounting position and the rotation angle is performed by the component recognition by the component recognition means (not shown) and the like.
The head unit 5 is moved onto the printed circuit board at a predetermined mounting work position to mount the chip component. In this case as well, the rocker arm 3 is activated by turning on the clutch cylinder 35 for the nozzle member 20 to be mounted and operating the Z-axis servomotor 30.
As the nozzle member 20 swings, the nozzle member 20 descends to a predetermined height close to the chip component, and in this state, the negative pressure supply to the nozzle member 20 is cut and the chip component is mounted on the substrate. The nozzle member 20 moves up.

Then, for example, while the clutch cylinder 35 is sequentially turned on and off for each nozzle member 20, the Z-axis servomotor 30 is repeatedly operated, so that the component mounting operation of each nozzle member 20 is successively performed. Done.

In this way, a series of operations from suction to mounting of chip components using the plurality of nozzle members 20 can be efficiently performed. Especially, one Z-axis servomotor 30
Each nozzle member 20 is driven by a relatively simple and compact mechanism using a clutch cylinder 35 and a clutch cylinder 35. Further, the clutch cylinder 35 holds the pivot member 35 in a raised position in response to supply and discharge of air pressure. Due to the structure that can be switched between the state and the state in which the pivot member 35 is lowered, the work efficiency is increased as compared with the conventional device of this type. The comparison of this work efficiency with the conventional device will be described with reference to FIG.

FIG. 8 is a time chart showing the operation of the cam when the nozzle members 20 are sequentially moved up and down one by one at the time of picking up and mounting the chip parts. The case of the apparatus of the embodiment is shown by a solid line, and the case of a conventional apparatus having a clutch mechanism (engagement / disengagement mechanism) that engages / disengages with the drive mechanism at the rising end position of the vertical movable range of the nozzle member is shown by a broken line. ing.

As shown in this figure, in the conventional apparatus, as the operation of each nozzle member at the time of suction and mounting, the clutch (CL) is turned ON at the rising end position and then lowered, and the suction or mounting is performed at the predetermined lowered position. After that, it is necessary to switch the next clutch to ON after returning to the rising end position again, and it is necessary to repeat the operation of the cam for the full stroke S1. Therefore, the suction and mounting operation times Ta ′, Tb ′
Becomes relatively long.

On the other hand, according to the apparatus of this embodiment, regardless of the operating position of the cam 32 of the camshaft 31, the air is supplied to and discharged from the clutch cylinder 35, so that the pivot member 34 is pushed up and the pivot member 34 is turned on. It is possible to switch to a clutch-off state in which 34 descends. Therefore, the vertical movement amount S2 by the cam can be reduced as compared with the full stroke of the nozzle member 20, and the nozzle up-and-down stroke can be supplemented by the vertical displacement of the fulcrum portion due to ON / OFF of the clutch. Since the vertical movement amount S2 of the cam during continuous operation of each nozzle member is reduced in this way, the operation times Ta and Tb during adsorption and mounting are greatly shortened compared to the conventional case.

Further, in addition to such a nozzle member raising / lowering operation at the time of suction and at the time of mounting, at the time of mounting parts,
The rotation angle of the chip component is adjusted by the rotation of the nozzle member 20 by the operation of the R-axis servomotor 40. The function of rotating the nozzle member 20 is also achieved with a relatively simple structure using one R-axis servomotor 40 as a drive source.
Moreover, since the encoder 47 is directly connected to one nozzle member 20 and the control for adjusting the rotation angle is performed based on the signal from this encoder 47, the rotation angle is particularly great in the nozzle member 20 to which the encoder 47 is directly connected. Is accurately adjusted. Therefore, the nozzle member 20 to which the encoder 47 is directly connected is made to adsorb a chip component for which precision of rotation angle adjustment is particularly required, and the other nozzle members are made to adsorb ordinary chip components. By doing so, it is possible to satisfy the requirements for accuracy while simplifying the structure of the rotary drive system.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on 2.

Since the structure of the mounting machine of the second embodiment is basically the same as that of the mounting machine of the first embodiment, the components having the same functions as those of the mounting machine are designated by the same reference numerals and their description is omitted. Will be omitted and only different points will be described below.

That is, in the mounting machine of the second embodiment, as shown in FIGS. 9 and 10, a rod-shaped elastic body 52 extending in the nozzle member arranging direction is arranged above the rocker arm 33 of the head unit 5. Both ends of the plunger member 51 are supported by the lower end of the plunger member 51 formed of a shaft. Pistons 51a, which are respectively located in a pair of stopper cylinders 50 fixed to both ends of the head unit 5 in the nozzle member arrangement direction, are integrally provided on the upper ends of the plunger members 51.

Each stopper cylinder 50 has a pair of upper and lower pressure chambers 50a and 50b. The pressure chambers 50a and 50b.
Is connected to an air supply source via an ON / OFF switching valve (not shown). That is, in the OFF state of the stopper cylinder 50 in which the air pressure is supplied to the pressure chamber 50b and the air is discharged from the pressure chamber 50a, the piston 51a is pushed up to hold the plunger member 51 in the raised position, while the air is supplied to the pressure chamber 50a. In the ON state of the stopper cylinder 50 in which air is discharged from the pressure chamber 50b while pressure is being supplied,
The piston 51a is pushed down to hold the plunger member 51 in the lowered position. Then, both stopper cylinders 50 are switched to the ON state or the OFF state at the same time, whereby the elastic body 52 is moved up and down with the displacement of each plunger member 51.

The operation of the nozzle lifting device of the second embodiment as described above will be described with reference to FIG.

The head unit 5 is used to supply the parts supply unit 3
When the chip component is picked up from, the stopper cylinder 50 is switched to the ON state with the head unit 5 positioned above the component supply unit 3. That is, each stopper cylinder 50 is turned on (air pressure is supplied to the pressure chamber 50a and air pressure is discharged from the pressure chamber 50b), so that each plunger member 51 is held at the lowered position as shown by the solid line in FIG. It Then, similarly to the first embodiment, the clutch cylinder 35 corresponding to the nozzle member 20 for sucking the chip component is turned on (air pressure is supplied to the pressure chamber 35a), and the Z-axis servomotor 30 is operated. In the state where the pivot member 34 is in the raised position shown by the solid line in FIG. 11, the rocker arm 33 swings around the connecting portion 33c with the pivot member 34 as a fulcrum with the rotation of the camshaft 31, and the nozzle is correspondingly moved. The member 20 descends to a predetermined height close to the chip component, sucks the chip component, and then rises. Then, the head unit 5 is moved onto the printed circuit board at a predetermined mounting work position, and the chip component is mounted.

When the mounting operation is completed, the stopper cylinder 50 is turned off (air pressure is supplied to the pressure chamber 50b and air pressure is discharged from the pressure chamber 50a), so that the plunger member 51 and the elastic body 52 are integrally formed as shown in FIG. It is held in a raised position (initial position) as indicated by a broken line.

By the way, in the mounting machine of the second embodiment, the stopper cylinder 50 is turned on in this way, whereby each nozzle member 20 is held at a constant raised position with respect to the vertical movement amount of the cam 32. The state to be set is set. That is, the clutch cylinder 35 is turned on.
Even if the rocker arm 33 is swung in accordance with the rotation of the crankshaft 31, the rocking of the rocker arm 33 is restricted by the elastic body 52, so that the cam 32 moves up and down as shown in FIG. The cam 3 in which the cam 32 and the cam follower 33a, which is the force point portion of the rocker arm 33, have a certain clearance F and are not in contact with each other.
Two operating positions are provided, and as a result, as shown in FIG. 12, a state in which each nozzle member 20 is held at a constant raised position with respect to the vertical operating amount S2 of the cam 32 is set. .

In addition, as described above, each clutch cylinder 35 is turned on in a state in which the nozzle member 20 is held at a constant raised position, that is, in an operating position of the cam 32 in which the cam 32 and the cam follower 33a are not in contact with each other. I am trying to switch to.

This is advantageous for increasing the speed of raising and lowering the nozzle member. In other words, in the above mounting machine,
When the chip components are continuously sucked and mounted, the Z-axis servomotor 30 is repeatedly operated and each nozzle member 20
The clutch cylinder 35 is sequentially turned on and off with respect to the clutch cylinder 35. However, if a large number of chip components are sucked and mounted in a shorter time, the camshaft 31 is rotated at high speed and the clutch cylinder 35 is turned on and off.
It is necessary to perform FF in a short time, and thereby to move the nozzle member 20 up and down at high speed.

However, if the elastic body 52 is not provided, when the cam shaft 31 is rotated at a high speed in order to move the nozzle member 20 up and down at a high speed, the clutch cylinder 35 is closed.
In the N state, the cam 32 that rotates at a high speed collides with the cam follower 33a, which causes the rocker arm 33 to move.
Will vibrate. Moreover, this vibration is transmitted to the nozzle member 20 and causes a so-called jumping phenomenon of the nozzle member 20, which vibrates the nozzle member 20 in the vertical direction. If the above-described jumping phenomenon of the nozzle member 20 occurs when mounting the chip component adsorbed to the nozzle 22, it may cause the mounting displacement of the chip component on the printed circuit board or the dropping of the chip component.

Therefore, as described above, the rocking of the rocker arm 33 is restricted by the elastic body 52, the operating position of the cam 32 is provided so that the cam 32 and the cam follower 33a do not contact, and the clutch cylinder 35 is turned on. By setting such a timing to such an operating position of the cam 32, the collision between the cam 32 and the cam follower 33a is avoided, and the cam 32 and the cam follower 33a slide smoothly.

As described above, in the mounting machine of the second embodiment, the chip components are smoothly sucked and mounted without causing the jumping phenomenon of the nozzle member 20 due to the collision between the rocker arm 33 and the cam 32. Therefore, it is possible to suitably perform the suction and mounting operation of the chip component in a shorter time while driving each nozzle member 20 at high speed. Moreover, it is possible to avoid the collision between the cam follower 33a, which is the power point of the rocker arm 33, and the cam 32 as described above. There is also an advantage that it can be prevented.

In the examples shown in FIGS. 8 and 10, the nozzle members are sequentially operated at the time of suction and at the time of mounting, but a plurality of nozzle members are simultaneously operated depending on the types of chip parts and printed circuit boards. It is possible to change the operating method in various ways, such as activating, or operating only some of the nozzle members.

Further, in the example shown in FIG. 10, the stopper cylinder 50 is in the ON state in both the suction and the mounting of the chip component. For example, while the nozzle member 20 is moved up and down at a high speed during the suction of the chip component, the mounting is performed. Sometimes, when the nozzle member 20 is driven so as to move up and down at a low speed, it is considered that a jumping phenomenon is relatively unlikely to occur in the nozzle member 20 at the time of mounting. Stopper cylinder 50 O only when
It may be set to the N state and switched to the OFF state when mounted.

Further, in the embodiment, the stopper cylinder 5
Although the plunger member 51 is operated in two stages of an ascending position and a descending position by supplying / discharging the air pressure to 0, for example, depending on the rotation speed of the nozzle shaft 31,
The plunger member 51 may be configured so that the operating position thereof can be set in multiple stages.

[0051]

As described above, according to the present invention, in a device in which a head unit is provided with a plurality of nozzle members for adsorbing chip components, a cam shaft connected to a drive source is provided with a cam for lifting each nozzle member. A rocker arm for moving the nozzle member up and down according to the rotation of the cam, a pivot member forming a fulcrum portion of the rocker arm, and a portion supporting the pivot member. Since a clutch cylinder having a pressure chamber and displacing the pivot member according to supply and discharge of fluid pressure to and from the pressure chamber is provided, the structure is relatively simple and compact with only one drive source. By supplying / discharging the fluid pressure to / from the clutch cylinder, the lifting / lowering operation of each nozzle member can be individually performed. Moreover, since the fulcrum position of the rocker arm is displaced according to the supply and discharge of the fluid pressure to the clutch cylinder, it is necessary to reduce the operation amount by the cam and reduce the operation time when the chip component is attracted and mounted. You can

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example of a mounting machine equipped with a nozzle lifting device according to a first embodiment of the present invention.

FIG. 2 is a schematic front view of the mounting machine.

FIG. 3 is a vertical cross-sectional front view of a main part of a head unit showing a nozzle lifting device.

FIG. 4 is a plan view of the main part of the head unit.

FIG. 5 is a vertical sectional side view of a main part of the head unit.

6 (a) and 6 (b) are explanatory views showing a state in which upper and lower two-stage belts are wound around in a mechanism for rotating each nozzle member.

FIG. 7 is an operation explanatory view of a mechanism for moving up and down each nozzle member.

FIG. 8 is a time chart showing the operation of the cam when sequentially moving up and down each nozzle member at the time of picking up and mounting a chip component.

FIG. 9 is a plan view of a main part of a head unit showing a nozzle elevating device according to a second embodiment.

FIG. 10 is a vertical cross-sectional side view of the main part of the head unit.

FIG. 11 is an operation explanatory view of a mechanism for moving up and down each nozzle member.

FIG. 12 is a time chart showing the operation of the cam and the operation of the nozzle member when sequentially raising and lowering each nozzle member at the time of suctioning and mounting the chip component.

[Explanation of symbols]

 5 Head Unit 20 Nozzle Member 30 Z-Axis Servo Motor 31 Cam Shaft 32 Cam 33 Rocker Arm 34 Pivot Member 35 Clutch Cylinder

Claims (2)

[Claims] 1. A mounting machine provided with a head unit movable between a component supply side and a mounting side, wherein a plurality of nozzle members for adsorbing chip components are provided in parallel on the head unit and can be moved up and down. A cam for raising and lowering each nozzle member is arranged on a cam shaft connected to a power source, and an action point portion engaging with the nozzle member and a force point portion engaging with the cam are provided for each nozzle member. A rocker arm having the same, a pivot member forming a fulcrum portion of the rocker arm, and a clutch having a pressure chamber in a portion supporting the pivot member and displacing the pivot member according to supply and discharge of fluid pressure to and from the pressure chamber. A nozzle elevating device for a mounting machine, which is provided with a cylinder. 2. An elastic body which is arranged above the rocker arm and regulates the rocking amount of the rocker arm, a plunger member which holds the elastic body, and a pressure chamber in a portion which supports the plunger member. 2. The nozzle lifting device for a mounting machine according to claim 1, further comprising: a stopper cylinder that displaces the plunger member in a plurality of steps according to supply and discharge of fluid pressure to and from the lever pressure chamber.