JP3115961B2 - Nozzle elevating device of mounting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle elevating device for elevating 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 which has been positioned by sucking a chip-shaped chip component such as an electronic component such as an IC from a component supply unit by a head unit having a nozzle member for chip component suction. 2. Description of the Related Art A mounting machine which is transported upward and is mounted on a predetermined position of a printed circuit board is generally known. In this mounting machine, usually, the head unit is X
The nozzle unit is movable in the axial direction and the Y-axis direction, and is provided with driving means in these directions, and a nozzle member is provided so as to be able to move up and down and rotate with respect to the head unit,
A drive 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. Then, the above-mentioned driving means and negative pressure supply means are controlled by the control unit, so that the suction and mounting operations of the chip components 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 increase the work efficiency of suction and mounting of chip components. In this case, it is required that each nozzle member can be individually lifted and lowered. However, if a servomotor for lifting and lowering is provided for each nozzle member, the head unit becomes large. And increase the cost.

For this reason, as shown in, for example, Japanese Patent Application Laid-Open No. Hei 4-11799, a single motor is used as a drive source, and a camshaft that is rotationally driven by this motor and a nozzle are provided for each nozzle member. 2. Description of the Related Art There is known an apparatus which comprises a mechanism for elevating and lowering a nozzle member with a cam lever which swings with the rotation of a cam shaft, and which has a lever locking arm driven by a solenoid for each cam lever. In this device, the nozzle member is raised and lowered by the driving force transmitted via the cam lever, and the lever locking arm can be disengaged from the cam lever in a state where the nozzle member is at the raised end position. The stop arm performs a function of a clutch for switching between a state in which the driving force transmission is prevented (the swing of the cam lever is prevented) and a state in which the driving force is transmitted.

[0005]

According to the conventional apparatus as described above, the engagement and disengagement (corresponding to ON / OFF of the clutch) of the lever locking arm with respect to the mechanism for elevating and lowering the nozzle member takes place.
Although it is possible only when the nozzle member is at the rising end position, in such a structure, as will be described in detail in the embodiment, in terms of work efficiency when sequentially operating each nozzle, There was room for improvement.

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

[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 the head unit includes a nozzle member for picking up chip components. In a mounting machine provided in parallel with a plurality of the nozzle members, each of the above-mentioned cams for raising and lowering the nozzle members is arranged on a cam shaft connected to a drive source. A rocker arm having a working 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 in a portion supporting the pivot member. A clutch cylinder for displacing the pivot member in accordance with the supply and discharge of the fluid pressure to and from the chamber (claim 1).

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 at a portion supporting the plunger member. A stopper cylinder for displacing the plunger member in a plurality of stages in accordance with the supply and discharge of the fluid pressure to and from the lever chamber is provided (claim 2).

[0009]

According to the first aspect of the present invention, the camshaft is rotationally driven by the drive source in a clutch ON state in which the pivot member is fixed at a predetermined height position by supplying fluid pressure to the clutch cylinder. Then, the rocker arm swings accordingly, and the nozzle member for picking up or mounting the chip component is moved up and down. In the clutch OFF state in which the pivot member is displaced due to the discharge of the fluid pressure from the clutch cylinder,
The elevating operation of the nozzle member is substantially stopped. And
Irrespective of the operating position of the cam, it is possible to switch between the clutch ON state and the clutch OFF state by supplying and discharging fluid pressure to and from the clutch cylinder.

According to the second aspect of the present invention, in the stopper ON state in which the plunger member is fixed at the predetermined lowered position by supplying the fluid pressure to the stopper cylinder,
The rocker arm swing 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 contact each other at a predetermined operation position during the vertical operation of the cam. By switching the clutch cylinder to the ON state at such a cam operating position, it is possible to prevent a jumping phenomenon (vibration) of the nozzle caused by a collision between the power 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 overall structure of a mounting machine according to a first embodiment of the present invention. In these figures, the base 1
On the upper side, a conveyor 2 constituting a transport line is arranged,
A printed board (not shown) is conveyed on the conveyor 2 and stopped at a predetermined mounting work position.

At the side of the conveyor 2, a component supply unit 3
Is arranged. The component supply unit 3 can supply 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. And chip-like chip components such as capacitors are stored at predetermined intervals. Then, the supply tape 3a is intermittently fed out as chip components are supplied by a feeding mechanism (not shown).

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

That is, a pair of fixed rails 7 extending in the Y-axis direction and a ball screw shaft 8 driven to rotate by a Y-axis servomotor 9 are disposed on the base 1. A head unit support member 11 is disposed on the support member 11, and a nut portion 12 provided on the support member 11 is screwed to 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 disposed on the support member 11 so that the head unit 5 can move on the guide member 13. A nut portion 15 held on the head unit 5 is screwed to the ball screw shaft 14. The ball screw shaft 8 is rotated by the operation of the Y-axis servo motor 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 servo motor 15, thereby causing the head unit to rotate. 5 is the support member 1
1 is moved in the X-axis direction.

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

3 to 5 show a specific structure of the nozzle elevating device. As shown in these figures, each of the nozzle members 20 has a hollow nozzle shaft 21.
The nozzle 22 formed integrally therewith is open at the tip of the nozzle. Further, 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 to prevent relative rotation. I have. Further, each housing 23 is rotatably held by the main body of the head unit 5, so that each nozzle member 20 can rotate together with the housing 23 around the R axis (nozzle center axis) with respect to the main body of the head unit 5. Has become.

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

Further, each head member 5 is provided with one nozzle member 20 using one Z-axis servo motor 30 as a drive source.
And a mechanism for rotating each nozzle member 20 using one R-axis servomotor 40 as a drive source.

The mechanism for raising and lowering each nozzle member 20 includes a camshaft 31, a rocker arm 33, a pivot member 34 and a clutch cylinder 35 provided for each nozzle member 20. The above camshaft 3
Reference numeral 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 and 37 and a belt 38. A cam 32 for raising and lowering the nozzle member is provided at a position corresponding to each nozzle member 20 of the camshaft 31.

Each of the rocker arms 33 has a cam follower 33a at an intermediate portion thereof, which abuts on the cam 32 to form a power point portion, and has a rocker arm engaging portion of the nozzle member 20 as an action point portion at one end. Part 24
And a coupling portion 33c to the pivot member 34 as a fulcrum portion on the other end side.

The pivot member 34 is formed of a shaft having an upper end connected to a connecting portion 33c of the rocker arm 33. A lower end of the pivot member 34 is integrally provided with a piston 34a located in a clutch cylinder 35. . The clutch cylinder 35 has a pressure chamber 35a below the piston 34a.
The pressure chamber 3 is connected to an air supply source through an F switching valve.
When air pressure is supplied to 5a, the piston 34a is pushed up to hold the pivot member 34 at the raised position. When the air is discharged from the pressure chamber 35a, the pivot member 34 is lowered to the lower end of the vertical movable range.

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

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

The operation of the nozzle elevating device as described above is shown in FIG.
This will be described with reference to FIG.

The component supply unit 3 is controlled by the head unit 5.
When the chip component is sucked from the nozzle member 2 with the head unit 5 positioned above the component supply unit 3,
When the negative pressure is supplied to 0, the nozzle member 20 for performing the suction of the chip component is operated. That is, the clutch cylinder 35 corresponding to the nozzle member 20 is turned on.
(Pneumatic pressure supply 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, the nozzle member 20 swings about the connecting portion 33c with the pivot member 34 as a fulcrum, and the nozzle member 20 correspondingly descends to a predetermined height close to the chip component, and moves up after sucking the chip component.

As described above, when the nozzle member 20 for picking up chip components is being lifted / lowered, the other nozzle members 20 have their corresponding clutch cylinders 35 OFF (air pressure from the pressure chamber 35a). (Discharge), the operation is substantially stopped, that is, in response to the clutch cylinder 35 being turned off, the pivot member 34 is displaced to a lowered position as shown by a two-dot chain line in FIG. In a state where the nozzle member 20 is the return spring 2
5 holds it in the raised position.

For example, when the suction of chip components by each nozzle member 20 is performed sequentially, the ON / OFF of the clutch cylinder 35 with respect to each nozzle member 20 is performed.
The Z-axis servomotor 30 is repeatedly operated while being sequentially turned off, so that the ascending and descending operations for suctioning the components of the nozzle members 20 are sequentially and sequentially performed.

When the suction of the components by each nozzle member 20 is completed, a process of obtaining the correction amount of the mounting position and the rotation angle is performed by component recognition or the like by a component recognition unit (not shown).
The head unit 5 moves onto a printed board at a predetermined mounting work position, and mounting of chip components is performed. In this case as well, the clutch cylinder 35 for the nozzle member 20 to be mounted is turned on and the Z-axis servomotor 30 is operated, so that the rocker arm 3 is turned on.
With the swing of 3, the nozzle member 20 descends to a predetermined height close to the chip component. In this state, after the negative pressure supply to the nozzle member 20 is cut and the chip component is mounted on the substrate, , The nozzle member 20 rises.

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

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

FIG. 8 is a time chart showing the operation of the cam when the lifting and lowering operations of the nozzle members 20 are sequentially performed one by one at the time of suction and mounting of the chip component. The solid line shows the case of the apparatus of the embodiment, and the broken line shows the case of the conventional apparatus having a clutch mechanism (disengagement mechanism) that engages and disengages with the drive mechanism at the rising end position of the vertical movable range of the nozzle member. ing.

As shown in the drawing, 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 suction or mounting is performed at the predetermined lowering position. After returning to the rising end position again, it is necessary to switch the next clutch to ON, and it is necessary to repeat the operation of the cam for the full stroke S1, so that the suction and mounting operation times Ta ', Tb'
Is 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 supply of air to and from the clutch cylinder 35 causes the pivot member 34 to be pushed up and the pivot member 34 to be pushed up. 34 can be switched to the clutch OFF state in which it descends. Therefore, the vertical movement of the fulcrum caused by the ON / OFF of the clutch can be compensated for by the vertical movement of the nozzle while the vertical operation amount S2 by the cam is made smaller than the full stroke of the nozzle member 20. Since the amount of vertical operation S2 of the cam at the time of continuous operation of each nozzle member is reduced, the operation times Ta and Tb at the time of suction and at the time of mounting are greatly reduced as compared with the related art.

In addition to the operation of raising and lowering the nozzle member at the time of suction and at the time of mounting, at the time of mounting components, etc.
The rotation angle of the chip component is adjusted by the rotation of the nozzle member 20 by the operation of the R-axis servo motor 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.
In addition, 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 the encoder 47, the rotation angle is particularly adjusted in the nozzle member 20 to which the encoder 47 is directly connected. Is adjusted with high accuracy. Therefore, a chip component that requires particularly high precision of rotation angle adjustment is sucked to the nozzle member 20 to which the encoder 47 is directly connected, and a normal chip component is sucked to the other nozzle members. If 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.
2 will be described.

The configuration of the mounting machine of the second embodiment is basically the same as that of the first embodiment. Are 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 arrangement direction is disposed above the rocker arm 33 of the head unit 5. Both ends are supported by the lower end of a plunger member 51 composed of a shaft. At the upper ends of the plunger members 51, pistons 51a 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.

Each stopper cylinder 50 has a pair of upper and lower pressure chambers 50a, 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 is discharged from the pressure chamber 50a while the air pressure is supplied to the pressure chamber 50b, the piston 51a is pushed up to hold the plunger member 51 at the raised position, while the air is supplied to the pressure chamber 50a. In the ON state of the stopper cylinder 50 where the air is discharged from the pressure chamber 50b while the pressure is supplied,
The plunger member 51 is held at the lowered position by pushing down the piston 51a. When the two stopper cylinders 50 are simultaneously switched to the ON state or the OFF state, the elastic body 52 moves up and down with the displacement of each plunger member 51.

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

The component supply unit 3 is controlled by the head unit 5.
When the chip component is sucked from the stopper cylinder 50, the stopper cylinder 50 is switched to the ON state with the head unit 5 positioned above the component supply unit 3. That is, when each stopper cylinder 50 is turned ON (supplying air pressure to the pressure chamber 50a and discharging air pressure from the pressure chamber 50b), each plunger member 51 is held at the lowered position as shown by a solid line in FIG. You. Then, as in the first embodiment, the clutch cylinder 35 corresponding to the nozzle member 20 to which the chip component is to be sucked is turned ON (air pressure is supplied to the pressure chamber 35a), and the Z-axis servomotor 30 is operated. In a state where the pivot member 34 is at the raised position indicated 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 The member 20 descends to a predetermined height close to the chip component, and moves upward after sucking the chip component. Then, the head unit 5 moves onto the printed circuit board at a predetermined mounting work position, and mounting of the chip component is performed.

When the mounting operation is completed, the stopper cylinder 50 is turned off (supplying air pressure to the pressure chamber 50b and discharging air pressure from the pressure chamber 50a), whereby the plunger member 51 and the elastic body 52 are integrally formed as shown in FIG. The state is maintained at the ascending position (initial position) as shown by the broken line in the middle.

By the way, in the mounting machine of the second embodiment, since the stopper cylinder 50 is turned ON in this manner, each nozzle member 20 is held at a constant ascending position with respect to the vertical operation amount of the cam 32. Is set. That is, the clutch cylinder 35 is turned on.
In this state, even if the rocker arm 33 swings with the rotation of the crankshaft 31, the swing of the rocker arm 33 is regulated by the elastic body 52, and as shown in FIG. A cam 3 having a certain clearance F so that the cam 32 and the cam follower 33a, which is the point of force of the rocker arm 33, do not come into contact with each other.
12, a state in which each nozzle member 20 is held at a constant ascending position with respect to the vertical operation amount S2 of the cam 32 is set as shown in FIG. .

In addition, each clutch cylinder 35 is turned on in the state where the nozzle member 20 is held at the fixed rising position as described above, that is, in the operating position of the cam 32 such that the cam 32 and the cam follower 33a are in a non-contact state. Is switched to

This is advantageous for increasing the elevating speed of the nozzle member. That is, in the above mounting machine,
In the case of continuously picking up and mounting chip components, the Z-axis servomotor 30 is repeatedly operated, and the nozzle members 20
Of the clutch cylinder 35 are sequentially performed. At this time, if a large number of chip components are to be sucked and mounted in a shorter time, the camshaft 31 is rotated at a 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 raise and lower the nozzle member 20 at high speed.

However, if the elastic member 52 is not provided, when the camshaft 31 is rotated at a high speed in order to raise and lower the nozzle member 20 at a high speed, the clutch cylinder 35 is turned off.
In the N state, the cam 32 rotating at a high speed collides with the cam follower 33a.
Will vibrate. In addition, the vibration is transmitted to the nozzle member 20 and causes the nozzle member 20 to vibrate in the up-down direction, which causes a so-called jumping phenomenon of the nozzle member 20. When the above-described jumping phenomenon of the nozzle member 20 occurs when the chip component adsorbed to the nozzle 22 is mounted, the mounting of the chip component on the printed circuit board may be caused or the chip component may be dropped.

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 set so that the cam 32 does not contact the cam follower 33a, and the clutch cylinder 35 is turned on. Is set to such an operation 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 according to the second embodiment, the chip components are smoothly sucked and mounted without causing a jumping phenomenon of the nozzle member 20 due to the collision between the rocker arm 33 and the cam 32. Since the nozzle members 20 can be driven at a high speed, the suction and mounting operations of the chip component can be suitably performed in a shorter time. In addition, since the collision between the cam follower 33a, which is the point of force of the rocker arm 33, and the cam 32 can be avoided as described above, damage to the cam follower 33a or the cam 32 due to the collision between the cam follower 33a and the cam 32 can be prevented. There is also the 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. , Or only a part of the nozzle members can be operated.

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. At times, when the nozzle member 20 is driven to move up and down at a low speed, it is considered that the jumping phenomenon does not easily occur in the nozzle member 20 at the time of mounting. Only when the stopper cylinder 50 is O
The state may be set to the N state and switched to the OFF state at the time of mounting.

Further, in the embodiment, the stopper cylinder 5
The supply and discharge of the air pressure to 0 causes the plunger member 51 to operate in two stages of an ascending position and a descending position. For example, according to the rotation speed of the nozzle shaft 31,
The operating position of the plunger member 51 may be set in multiple stages.

[0051]

As described above, according to the present invention, in an apparatus in which a plurality of nozzle members for chip component suction are provided in a head unit, cams for lifting and lowering each nozzle member are arranged on a cam shaft connected to a drive source. A rocker arm for raising and lowering the nozzle member in accordance with the rotation of the cam, a pivot member constituting a fulcrum portion of the rocker arm, and a portion supporting the pivot member are provided for each nozzle member. A clutch cylinder that has a pressure chamber and displaces the pivot member in accordance with supply and discharge of fluid pressure to and from the pressure chamber is provided. By supplying and discharging fluid pressure to and from the clutch cylinder, it is possible to individually raise and lower each nozzle member. In addition, since the fulcrum position of the rocker arm is displaced in accordance with the supply and discharge of the fluid pressure to and from the clutch cylinder, the amount of operation by the cam is reduced at the time of suction and mounting of the chip component, thereby reducing the operation time. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic plan view illustrating an example of a mounting machine including a nozzle elevating 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 sectional front view of a main part of a head unit showing a nozzle elevating device.

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

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

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

FIG. 7 is an operation explanatory view of a mechanism for elevating and lowering each nozzle member.

FIG. 8 is a time chart showing the operation of a cam when sequentially moving up and down each nozzle member when 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 sectional side view of a main part of the head unit.

FIG. 11 is an operation explanatory view of a mechanism for elevating and lowering each nozzle member.

FIG. 12 is a time chart showing the operation of the cam and the operation of the nozzle members when the respective nozzle members are sequentially moved up and down during suction and mounting of the chip component.

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-53-114073 (JP, A) JP-A-59-224200 (JP, A) JP-A-60-148189 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H05K 13/04

Claims (2)

(57) [Claims] 1. A mounting machine comprising a head unit movable between a component supply side and a mounting side, and a plurality of nozzle members for picking up chip components arranged in parallel in the head unit so as to be movable up and down. The cams for raising and lowering each of the nozzle members are arranged on a camshaft connected to a source, and for each of the nozzle members, an action point portion that engages with the nozzle member and a force point portion that engages with the cam, respectively. A rocker arm, a pivot member forming a fulcrum portion of the rocker arm, and a clutch having a pressure chamber at a portion supporting the pivot member and displacing the pivot member in accordance with supply and discharge of fluid pressure to and from the pressure chamber. A nozzle elevating device for a mounting machine, comprising a cylinder. An elastic body disposed above the rocker arm for regulating the rocking amount of the rocker arm, a plunger member for holding the elastic body, and a pressure chamber at a portion supporting the plunger member. 2. The apparatus according to claim 1, further comprising a stopper cylinder for displacing the plunger member in a plurality of stages in accordance with the supply and discharge of the fluid pressure to and from the lever pressure chamber.