JPH11204991A - Nozzle holding device for surface mounting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a nozzle from loosening against a nozzle holder on the nozzle fitted state, while attaching/detaching of the nozzle is easy. SOLUTION: A nozzle holder 1 provided at a head unit for attaching part is provided with a nozzle guide hole 5, the nozzle guide hole 5 is provided with a chuck member 10 while advancing/receding allowed, and an axis part 20 of a nozzle 2 is inserted in the chuck member 10. The chuck member 10 is formed into such a cylinder as a slit-like notch 11 extending in axial direction is provided, for enlargement/reduction according to reciprocal driving. The axis part 20 is engaged for play while the chuck member 10 is in enlarged- diameter state, and the tip end inner-periphery of the chuck member 10 is press- contacted to the axis part 20 of the nozzle 2 while in reduced-diameter state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting machine for sucking and mounting a component by a nozzle member mounted on a movable component mounting head unit. In particular, the nozzle is selectively mounted in accordance with the type of the component. The present invention relates to a nozzle holding device in a surface mounter to be used.

[0002]

2. Description of the Related Art Conventionally, a nozzle member for picking up and lowering components is provided on a movable head unit so as to be able to move up and down and rotate, and the nozzle member picks up a component from a component supply unit and mounts the component on a printed circuit board positioned. There is known a surface mounter adapted to do so.

The nozzle member of such a mounting machine has conventionally been
For example, the structure is as shown in FIG.

That is, a nozzle member 104 shown in FIG.
Is composed of a hollow nozzle shaft 103 attached to a head unit (not shown), a nozzle holder 101 provided at the lower end thereof, and a nozzle 102 detachably attached to the nozzle holder 101. The negative pressure for component suction is guided from the negative pressure supply source into the nozzle shaft 103 and acts on the tip of the nozzle 102. A plurality of types of nozzles 102 having different sizes, shapes, and the like at the tips are prepared in advance, and the nozzles 102 suitable for the type of the component to be mounted are prepared.
Are selectively mounted on the nozzle holder 101, and the nozzle 102 can be replaced according to the type of component to be mounted and the like.

[0005] As shown in FIG. 1, for example, a structure in which the nozzle 102 is detachably attached to the nozzle 102 is provided at the lower end of the nozzle holder 101 with a hollow thin shaft 105 and left and right sides of the thin shaft 105. Nozzle supporting leaf springs 106 are provided on both sides, and a held portion 107 having a fitting hole (not shown) corresponding to the thin shaft portion 105 is provided at an upper end portion of the nozzle 102. Have been. Then, the held portion 107 at the upper end of the nozzle 102 is externally fitted to the thin shaft portion 105, and the leaf spring 106 elastically abuts the outer periphery of the held portion 107 from both sides. It is designed to be held by a holder 101.

[0006]

According to the conventional structure as described above, the small shaft portion of the nozzle holder and the portion to be held by the nozzle have a slight clearance so that the nozzle can be easily attached to and detached from the nozzle holder. Therefore, even if the nozzle is sandwiched by the above-mentioned leaf spring, it is difficult to prevent a slight rattling of the nozzle with respect to the nozzle holder. Then, if such rattling of the nozzle occurs, there is a possibility that the mounting accuracy and the like may be adversely affected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem.
It is an object of the present invention to provide a nozzle holding device of a surface mounter that can surely prevent rattling of a nozzle with respect to a nozzle holder in a nozzle mounted state.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a nozzle holding device for a surface mounter in which a nozzle for sucking an electronic component is detachably attached to a nozzle holder provided on a component mounting head unit. The nozzle holder is provided with a chuck member which expands / contracts into a nozzle fixed state in which the nozzle is pressed and fitted to the nozzle with movement in the nozzle axis direction and a nozzle detachable state in which the nozzle member is released from the nozzle, and the chuck member is moved in the nozzle axis direction. And a driving means for driving it forward and backward.

According to this device, switching between the nozzle fixed state and the nozzle detachable state is performed in accordance with the movement of the chuck member by the driving means. Then, in the nozzle fixed state, rattling of the nozzle is prevented by press-fitting the chuck member to the nozzle. In the state where the nozzle can be detached, the chuck member and the nozzle are separated, so that the nozzle can be easily detached.

In this apparatus, a cylindrical member having a slit-shaped notch extending in the nozzle axis direction is provided as a chuck member, and the cylindrical member is provided with a wedge-shaped portion tapering toward the tip of the nozzle holder. It can be configured to be inserted into the hole for introducing the nozzle. With this arrangement, when the chuck member reaches the wedge-shaped portion with the nozzle inserted into the cylindrical body, the cylindrical body is reduced in diameter and the nozzle is fixed, while when the chuck member comes off from the wedge-shaped portion, the cylindrical body expands. The nozzle can be attached and detached.

In this apparatus, the chuck member is composed of a pair of cylindrical bodies which are arranged in series in the nozzle axis direction and whose corresponding inclined surfaces are in contact with each other. A configuration that can be held so as to be relatively movable along.

With this arrangement, when the cylinders are relatively moved in the direction of the nozzle axis with the nozzle inserted between the cylinders, the cylinders are displaced in opposite directions to each other. As a result, the inner surface of each cylindrical body is pressed against the nozzle, and the nozzle is fixed. When the cylinders are arranged such that the axes of the cylinders coincide with each other by 10,000, the crimping of the cylinders is released, and the nozzle can be detached.

[0013]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. In this figure, reference numeral 1 denotes a nozzle holder, and 2 denotes a nozzle which is detachably attached to the nozzle holder 1. The nozzle holder 1 is a hollow nozzle shaft (not shown)
It is fixed to the lower end of. A nozzle member is constituted by the nozzle shaft, the nozzle holder 1 and the nozzle 2, and the nozzle member is mounted on a head unit (not shown) of the surface mounter so as to be able to move up and down and rotate.

The nozzle holder 1 has a nozzle fitting portion 3 at the tip thereof, and the nozzle 2 is attached to the nozzle fitting portion 3. The nozzle fitting portion 3 has a nozzle introduction hole 5 formed therein.
Holder Nozzle Holder 1 to Conduct Negative Pressure for Suction
Communicating with a passage 4 formed therein.

The nozzle introduction hole 5 has a tip (lower in the figure).
A large diameter portion 5a and a small diameter portion 5b are vertically provided via a wedge-shaped portion 5c tapered toward the small diameter portion 5c.
A taper 5d is formed at the tip of b to facilitate receiving the nozzle 2.

A chuck member 10 for press-fitting the nozzle 2 is inserted into the large-diameter portion 5a so as to be axially displaceable, and a stepped portion 6 formed in the nozzle holder 1 and the chuck member The chuck member 10 is urged toward the distal end by a spring 7 interposed between the chuck member 10 and the chuck member 10.

The chuck member 10 has a tapered tip portion 10.
This is a cylindrical member provided with a, and has slit-shaped notches 11 extending in the axial direction at a plurality of positions in the circumferential direction. The diameter of the distal end can be reduced in response to external force from the surroundings. A plurality of support shafts 12 are further radially provided around the chuck member 10.
The support shaft 12 protrudes outward through an axial guide hole 8 formed in the nozzle holder 1, and is externally slidably fitted to the nozzle holder 1 in the axial direction. Is connected to the cylindrical movable member 15. The movable member 15 is connected to an electromagnetic solenoid (not shown) so that the movable member 15 is driven forward and backward relative to the nozzle holder 1 by a fixed stroke. That is, when the solenoid is turned on, the movable member 15 and the chuck member 10 are integrally held at the rising end position against the urging force of the spring 7, and when the solenoid is turned off, the descending end position is urged by the urging force of the spring 7. Is to be held.

When the chuck member 10 is at the lower end position in such a reciprocating operation of the chuck member 10, the distal end portion 10a of the chuck member 10 is pressed against the wedge-shaped portion 5c of the nozzle introduction hole 5, whereby the chuck is moved. When the inner diameter of the member 10 is reduced and the chuck member 10 is at the rising end position, the distal end portion 10a of the chuck member 10 is appropriately separated from the wedge-shaped portion 5c, whereby the inner diameter of the distal end of the chuck member is restored ( It is configured to be in a state where the diameter has been increased (the state shown in FIG. 1).

On the other hand, the nozzle 2 has a shaft portion 20 inserted into the chuck member 10 through the nozzle introduction hole 5,
A head 21 connected to the shaft portion 20 via a collar portion 22, and inside a portion extending from the shaft portion 20 to the head portion 21, a negative pressure conducting passage communicating with the passage 4 through the nozzle introduction hole 5. A passage 23 is formed. In the relationship between the shaft portion 20 and the small-diameter portion 5b and the chuck member 10 in the nozzle fitting portion 3, the small-diameter portion 5b and the tip inner diameter of the chuck member 10 (the chuck inner diameter) are small enough to allow the shaft portion 20 to be loosely fitted. (The inner diameter when the member 10 is at the raised position).

On the lower end surface of the nozzle fitting portion 3 and the upper surface of the nozzle 2 of the nozzle holder 1, a corresponding engaging projection 24 and an engaging hole for positioning the nozzle 2 in the rotation direction with respect to the nozzle holder 1 are provided. 25 are provided.

According to the apparatus of the present embodiment as described above,
When attaching the previously separated nozzle 2 to the nozzle holder 1, first, the solenoid is turned on to set the chuck member 10 at the rising end position, thereby expanding the tip portion 10a of the chuck member 10. The shaft portion 20 of the nozzle 2 is loosely fitted into the chuck member 10 via the small diameter portion 5b of the nozzle fitting portion 3 in this state.
At this time, by engaging the engagement protrusion 24 with the engagement hole 25, the positioning of the nozzle 2 with respect to the nozzle holder 1 in the rotation direction is achieved.

Then, when the solenoid is turned off, as shown in FIG. 2, the urging force of the spring 7 moves the nozzle introduction hole 5 to the lower end position, and the tip end 10a of the chuck member 10 contracts accordingly. By being diametered,
The inner periphery of the chuck member 10 is pressed against the shaft portion 20 of the nozzle 2, and the nozzle 2 is fixed. In this fixed state, rattling does not occur between the nozzle fitting portion 3 and the nozzle 2, and operations such as lifting and lowering, rotation, and component suction of the nozzle 2 during mounting are performed well.

When the nozzle 2 is removed from the fixed state, if the solenoid is turned on while the head unit is positioned above the nozzle storage place, etc.
With the movement of the chuck member 10 to the rising end position, the tip 1
0a is enlarged, whereby the nozzle 2
Is detached, and the nozzle 2 can be easily removed.

As described above, according to the above apparatus, the nozzle 2
Can be easily attached and detached, and rattling of the nozzle can be reliably prevented when the nozzle is mounted.

According to this apparatus, automatic replacement of nozzles at the nozzle replacement station provided in the mounting machine can be easily performed. That is, as shown in FIG. 3, if a plurality of types of nozzles 2 having different shapes and the like can be stored in the nozzle replacement station S, when it becomes necessary to replace the nozzles in accordance with a change in mounted components, etc. The head unit is moved to the nozzle replacement station S, and the nozzle 2 is placed on the nozzle replacement station S by the above-mentioned nozzle removal operation.
The nozzle unit is fitted to the nozzle fitting portion 3 by moving the head unit above another nozzle 2 set to the nozzle 2. Thereby, the nozzle 2 can be automatically replaced.

FIG. 4 shows a second embodiment of the present invention. In the description of the second embodiment, the first
The same reference numerals are given to the same parts as those of the first embodiment, the description is omitted, and only the differences will be described in detail.

In the nozzle holder 1 shown in this figure, a chuck member 30 as shown in the figure is inserted into the large diameter portion 5a of the nozzle introduction hole 5 instead of the chuck member 10. In this embodiment, the nozzle introduction hole 5 is not provided with the wedge-shaped portion 5c.

The chuck member 30 has nozzle insertion holes 31a, 31a, respectively, as shown in the figure, and is arranged in series in the axial direction, and a pair of upper and lower cylindrical bodies 30a, The lower tubular body 30b is fixed to the nozzle holder 1, while the upper tubular body 30a is provided so as to be able to move up and down along the inclined surface. Although not shown, the upper cylindrical body 30a is connected to the electromagnetic solenoid via a connecting member, so that the cylindrical body 30a is driven forward and backward along the inclined surface by a fixed stroke. ing. That is, when the solenoid is turned on,
The upper cylindrical body 30a is held at the rising end position against the urging force of the spring 7, and when the solenoid is turned off, the cylindrical body 30a is held at the lower end position by the urging force of the spring 7. I have.

The nozzle insertion hole 3 of each of the cylindrical bodies 30a, 30b
1a and 31b have the same diameter. Particularly, the lower cylindrical body 30b is attached to the nozzle holder 1 such that the axis of the nozzle insertion hole 31b and the axis of the nozzle introduction hole 5 coincide. Fixed. On the other hand, the upper cylindrical body 30a
Only when the cylindrical body 30a is at the rising end position, the axial center of the nozzle insertion hole 31a is the nozzle insertion hole 3 of the lower cylindrical body 30b.
It is structured so as to coincide with the axis 1b.

According to the apparatus of the present embodiment as described above,
When attaching the nozzle 2 to the nozzle holder 1, first, the solenoid is turned on and the upper cylindrical body 3 is turned on.
0a is set at the rising end position.
In the state where the axes of the nozzle insertion holes 31a and 31b of the nozzle insertion holes 31a and 31b are aligned (the state shown in FIG. 4), in this state, the nozzle insertion holes 31 through the small-diameter portion 5b of the nozzle fitting portion 3 are set.
The shaft portion 20 of the nozzle 2 is loosely fitted over a and 31b.

Then, when the solenoid is turned off, the upper cylindrical body 30a is urged toward the lower end position by the urging force of the spring 7, as shown in FIG. As a result, the inner surfaces of the cylindrical bodies 30a and 30b, more specifically, the inner surfaces of the cylindrical bodies 30a and 30b that face each other in the direction of the inclined surface are pressed against the shaft portion 20 and the nozzle 2 is fixed. The rattling between the joint 3 and the nozzle 2 is prevented.

When the nozzle 2 is removed from the fixed state, if the solenoid is turned on while the head unit is located above the nozzle storage place,
With the movement of the upper cylindrical body 30a to the rising end position, the axes of the nozzle insertion holes 31a and 31b coincide with each other,
Thereby, the nozzle 2 is detached from the nozzle fitting portion 3, and the nozzle 2 can be easily removed.

As described above, even with the apparatus of the second embodiment, the nozzle 2 can be easily attached and detached, and the rattling of the nozzle 2 can be reliably prevented in the nozzle mounted state.

The first and second embodiments are examples of a part of the nozzle holding device according to the present invention.
The specific configuration can be appropriately changed without departing from the gist of the present invention.

For example, in the example of FIG.
Instead of providing the spring 7 or the movable member 15, as shown in FIG. 6, a ball screw shaft 36 is protruded from the lower end of the nozzle shaft 35, and the nozzle holder 1 is screwed onto the ball screw shaft 36. , Ball screw shaft 3
The chuck member 10 may be configured to be axially pressed at the six tips via the thrust bearing 37. With this configuration, for example, when the nozzle shaft 35 is rotated forward with the nozzle holder 1 fixed, the chuck member 10 is pressed by the ball screw shaft 36 to reduce the diameter. On the other hand, when the nozzle shaft 35 is inverted, the pressing force by the ball screw shaft 36 is released, and the chuck member 1 is released.
0 is returned, that is, the diameter is expanded. Therefore, according to such a configuration, the chuck member 30 can be expanded and contracted with a rational configuration using the rotation drive of the nozzle shaft 35. In the case of this configuration, it is necessary to fix the nozzle holder 1 to the nozzle shaft 35 as described above when the nozzle 2 is attached / detached. What is necessary is just to provide a member. In general, the head unit is provided with a rotation drive mechanism for adjusting the mounting angle, and this may be used to rotate the nozzle shaft 35. Further, a spring or the like for urging the chuck member 10 toward the nozzle shaft 35 may be provided in order to promote the diameter expansion of the chuck member 10.

In the example shown in FIG. 1, the chuck member 10 is connected via a support shaft 12 to a cylindrical movable member 15 slidably fitted to the nozzle holder 1, and the movable member 15 is operated. Although the chuck member 10 is displaced to the rising end position, as shown in FIG. 7, the rod 40 is passed through the passage 4, and the tip (lower end) of the rod 40 is connected to the chuck member via the pin member 41. The chuck member 10 may be displaced by being fixed inside the chuck 10 and operating the rod 40 with an electromagnetic solenoid or the like. In this case, as shown in the figure, a support plate 42 having a through-hole 43 for supplying a negative pressure is installed in the passage 4, and the support plate 42 supports the rod 40 so as to be able to move up and down. I just need. According to such a configuration, since the movable portion is disposed in the nozzle holder 1, the size of the nozzle holder 1 can be suppressed, and malfunction or damage due to external contact of the movable portion can be avoided. There is. The rod 40 may be replaced by a wire.

In each of the above embodiments, a solenoid is used as an actuator for driving the chuck members 10 and 30 to move forward and backward. Alternatively, an air cylinder or a motor may be used.

[0039]

As described above, according to the present invention, the chuck member is provided on the nozzle holder provided in the head unit for mounting components, and the nozzle is moved in accordance with the axial movement of the chuck member by the driving means. Since the chuck member is switched between a nozzle fixed state in which the nozzle is crimped and fitted and a nozzle detachable state in which the nozzle is separated from the nozzle,
In the nozzle fixed state, rattling of the nozzle can be reliably prevented, and in the nozzle removable state, the nozzle can be easily removed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view (before mounting a nozzle) showing a first embodiment of a nozzle holding device of the present invention.

FIG. 2 is a longitudinal sectional view (in a nozzle mounted state) showing the first embodiment of the nozzle holding device of the present invention.

FIG. 3 is a sectional view showing a schematic configuration of a nozzle exchange station.

FIG. 4 is a longitudinal sectional view showing a second embodiment of the nozzle holding device of the present invention (a state in which a tubular body is at an ascending position).

FIG. 5 is a longitudinal sectional view (a state in which a cylindrical body is at a lowered position) showing a nozzle holding device according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a modified example of the nozzle holding device according to the first embodiment.

FIG. 7 is a longitudinal sectional view showing a modified example of the nozzle holding device according to the first embodiment.

FIG. 8 is a longitudinal sectional view showing a conventional nozzle holding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle holder 2 Nozzle 3 Nozzle fitting part 4 Passage 5 Nozzle introduction hole 6 Stepped part 7 Spring 8 Guide 10 Chuck member 11 Notch 12 Support shaft 15 Movable member 20 Shaft part 21 Head 22 Collar part 23 Passage 24 Engagement Projection 25 Engagement hole

Claims (3)

[Claims] 1. A nozzle holding device for a surface mounter, wherein a nozzle for sucking an electronic component is detachably attached to a nozzle holder provided on a component mounting head unit, wherein the nozzle holder is provided with a nozzle axial direction. A chuck member that expands and contracts to a nozzle fixed state in which the nozzle is press-fitted with the nozzle and a nozzle detachable state that is released from the nozzle, and a driving unit that drives the chuck member to advance and retreat in the nozzle axis direction. A nozzle holding device for a surface mounting machine. 2. The nozzle according to claim 1, wherein the chuck member is formed of a cylindrical body having a slit-shaped notch extending in the nozzle axis direction, and is provided in the nozzle holder, and has a wedge-shaped portion tapering toward the tip of the nozzle holder. 2. The nozzle holding device for a surface mounter according to claim 1, wherein the nozzle holding device is inserted into an introduction hole. 3. The chuck member is composed of a pair of cylindrical bodies arranged in series in the nozzle axis direction and corresponding inclined surfaces are in contact with each other, and these cylindrical members are relatively arranged along the inclined surface. 2. The nozzle holding device for a surface mounter according to claim 1, wherein the nozzle holding device is held so as to be movable.