JP2002151890A - Electronic component mounting equipment - Google Patents

Abstract

(57) [Summary] [PROBLEM] To increase the size of an electronic component clamping device without increasing the size.
Provided is an electronic component mounting device capable of stably holding relatively heavy electronic components. SOLUTION: A cylinder 18, a piston 20 slidable in the cylinder 18, and an electronic component 22 which can be engaged with the piston 20 and interlock and release the electronic component 22 when the piston 20 slides. In the electronic component mounting apparatus including the electronic component holding device 12 including the held holding portion 24, a holding spring 26 for urging the holding portion 24 toward the direction of holding the electronic component 22, and a positive pressure applied to the cylinder 18. A release pressure supply means for supplying a release pressure and driving the holding portion 24 against the biasing force of the holding spring 26 to release the electronic component 22 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus for mounting an electronic component on a substrate.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, in order to mount an electronic component on a substrate, an electronic component mounting device 102 having an electronic component holding device 100 capable of holding and releasing the electronic component is shown. Is widely used.

An electronic component mounting apparatus 102 includes a hollow slide shaft 104 in the Z direction and a slide shaft 10
4 has a head section 106 that supports the head section 4 so as to be movable in the Z direction and rotatable about the θ axis, and an XY drive section 108 that supports the head section 106 so as to be movable in the XY directions.

[0004] The electronic component holding device 100 is detachably supported near the lower end of the slide shaft 104 and is movable between an electronic component supply unit 110 and a component mounting unit 112 to which a board is transported.

The electronic component clamping device 100 is generally engaged with a cylinder 114, a piston 116 slidable in the cylinder 114, and a pin 117 of the piston 116. And a holding section 120 capable of holding and releasing the electronic component 118 in conjunction with the electronic component 118.

The holding portion generally has a pair of claw members, and one or both of the claw members are configured to swing. By this swing, the lower end portions of the pair of claw members approach and separate from each other, and pinch or release the electronic component.

In this embodiment, the holding portion 120 is a fixed claw member 1.
22a and a swinging pawl member 122b. When the piston 116 slides, the swinging pawl member 122b swings about a horizontal shaft 123 to move the fixed pawl member 12b.
2a.

The piston 116 is normally urged by a spring 124 and pressed against the swinging pawl member 122b to be separated from the fixed pawl member 122a. When a negative pressure is supplied to the cylinder 114 via the slide shaft 104, the piston 116 slides against the urging force of the spring 124 so that the swing claw member 122b approaches the fixed claw member 122a. ing. On the other hand, when a positive pressure is supplied into the cylinder 114 or when the pressure in the cylinder 114 is released to the atmospheric pressure, the piston 116 is urged by the spring 124 to slide, and the swinging pawl member 122b is fixed to the fixed pawl member. 122a
Is to be kept away from.

By controlling the pressure in the cylinder 114 in this manner, the electronic component holding device 100 can easily hold and release the electronic component 118.

[0010]

However, in the conventional electronic component clamping device, the force for clamping the electronic component is insufficient due to the urging force of the spring, and the relatively heavy electronic component is dropped due to the clamping. There was a case.

That is, since a part of the driving force of the piston for holding the electronic component and the biasing force of the spring acting on the side releasing the electronic component cancel each other, the force for holding the electronic component becomes insufficient. When a relatively heavy electronic component is pinched, the pinched electronic component may drop.

On the other hand, by increasing the diameter of the piston, the electronic components can be strongly clamped. However, increasing the diameter of the piston causes a new problem of increasing the size of the electronic component clamping device. Become.

[0013] The present invention has been made in view of the above problems, and without increasing the size of the electronic component holding device,
An object of the present invention is to provide a highly reliable electronic component mounting apparatus capable of stably holding relatively heavy electronic components.

[0014]

According to the present invention, there is provided a cylinder, a piston slidable in the cylinder, and a piston engaged with the piston. An electronic component clamping device, comprising: a clamping portion capable of clamping and releasing the electronic component in conjunction with
In an electronic component mounting apparatus for mounting an electronic component on a substrate, a holding spring for urging the holding portion in a direction for holding the electronic component, and a positive pressure or a negative pressure releasing pressure is supplied to the cylinder, and the holding spring is provided. Release pressure supply means capable of driving the holding portion in a direction to release the electronic component against the urging force of
The above object is attained by an electronic component mounting apparatus characterized in that the device is provided.

[0015] In addition, the clamping pressure is supplied to the cylinder in a direction opposite to the positive and negative, so that the clamping portion can be urged in the same direction as the urging direction of the clamping spring. A nip pressure supply means for interrupting the supply of the nip pressure during the supply may be provided.

According to the present invention, a relatively heavy electronic component can be stably held.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The electronic component mounting apparatus 10 according to the embodiment of the present invention has an electronic component holding device 12 shown in FIGS.
And further comprises a release pressure supply means 14 and a clamping pressure supply means 16 shown in FIG.

The other structure of the electronic component mounting apparatus 10 is the same as that of the above-described conventional electronic component mounting apparatus 102, and thus the description is omitted.

As shown in FIG. 2, the electronic component clamping device 12 includes a cylinder 18 formed in a cylindrical main body 17.
A piston 20 slidable in the cylinder 18,
A holding portion 24 that is engaged with the lower end of the piston 20 in the figure and that is capable of holding and releasing the electronic component 22 in conjunction with the sliding of the piston 20 when the piston 20 slides. And a holding spring 26 for urging the holding portion 24 in a direction for holding the electronic component.

The electronic component clamping device 12 has a cylindrical main body 17.
Is detachably supported near the lower end of the hollow slide shaft 29 on the upper end side.

The cylinder 18 is formed as a middle step hole 17a of three stepped holes in the vertical direction of the main body 17. The stepped holes are formed so as to become narrower in this order from the lower hole 17b to the middle hole 17a and the upper hole 17c.

The piston 20 comprises a disk-shaped head 20a, and a substantially round rod-shaped neck 20b projecting coaxially downward from the lower end of the head 20a. It is loose fit.

A pair of vertical parallel plane portions 20c are formed on both sides in the horizontal direction near the lower end of the neck portion 20b, and a pin hole 20d is formed through the vicinity of the central portion of these plane portions 20c in the horizontal direction. ing.

The holding section 24 includes a slider 30, a fixed claw member 32 fixed to the lower end of the slider 30, and a swing claw member 34 pivotally supported near the lower end of the slider 30. .

The slider 30 comprises a cylindrical body 30a and a fixed claw support 30b which projects downward from the lower surface of the cylindrical body 30a.
And the swinging pawl support 30c.

The cylindrical body 30a has a main body 17 at its outer periphery.
The lower hole 17b is loosely fitted to the neck 20b of the piston 20 at the center hole.

An elongated hole 30d in the axial direction is formed in the side wall of the cylindrical body 30a, and a horizontal guide pin 36 screwed near the lower end of the main body 17 is inserted into the elongated hole 30d. .

As a result, the slider 30 is slidable relative to the main body 17 within a certain range in the axial direction, and is not rotatable around the axis.

The holding spring 26 is connected to the neck 20 of the piston 20.
b, the lower end of the compression coil spring is in contact with the upper surface of the slider 30 and the upper end is in contact with the lower surface of the head 20a of the piston 20.
Is urged upward.

The lower end of a buffer spring 38, which is a compression coil spring, is in contact with the upper surface of the slider 30. This buffer spring 38 is loosely fitted in the lower step hole 17b of the main body 17 at the outer peripheral portion, and is in contact with the lower surface of the stepped portion at the upper end of the lower step hole 17b at the upper end.

As a result, the slider 30 is biased downward, and normally protrudes to the lower limit.

Fixed claw support 30b and swinging claw support 30c
Are provided axially symmetrically with respect to the vicinity of the lower end of the neck 20b of the piston 20, and each of the pair of parallel plane portions 2 of the neck 20b.
The side surfaces have substantially the same width as 0c, and these side surfaces and the parallel plane portion 20c are arranged so as to be included in substantially the same plane. A pin hole 30e penetrating the side surface in the horizontal direction is formed in the swing claw support portion 30c.

The fixed claw member 32 protrudes downward from the lower end of the fixed claw support portion 30b, and has a substantially rectangular plate-shaped fixed claw 32a formed with one surface facing the axis, and a vertical claw 32a. And a horizontal protruding portion 32b of a substantially rectangular plate-like body formed so as to protrude from the middle portion in the direction toward the axis.

The rocking claw member 34 is fixed to the fixed claw 3 across the axis.
Swinging claw 3 of a substantially rectangular plate-like body, which is arranged to face the surface 4a
4a, and a pair of guide plates 34b formed to protrude axially from both sides in the width direction of the upper end of the swing claw 34a.

The guide plates 34b are substantially rectangular plate-shaped members, and are disposed opposite to each other with the side surface of the swing claw support portion 30c and the parallel flat portion 20c of the neck portion 20b of the piston 20 interposed therebetween. It is connected integrally with the upper end.

A horizontal pin hole 34c is formed near the end of the guide plate 34b on the side of the swing claw 34a.

The swinging pawl member 34 is pivotally supported by the slider 30 via a pin 38 passing through the pin hole 34c and the pin hole 30e of the swinging pawl support 30c.

On the other hand, a U-shaped notch 34d is formed at the axial end of the guide plate 34b.

The swinging pawl member 34 is swingably and loosely fitted to the notch 34d, and is engaged with the piston 20 via a pin 40 passing through a pin hole 20d near the lower end of the piston 20, When the piston 20 slides in the vertical direction, the piston 20 swings in conjunction therewith.

The swing claw member 34 swings, and the fixed claw member 32
The holding portion 24 can hold and release the electronic component 22 by approaching and separating from the electronic component 22.

The oscillating claw member 34 is normally urged by the pinching spring 26 via the pin 40 and the piston 20, and the oscillating claw 34a itself comes into contact with the tip of the horizontal protruding portion 32b of the fixed claw member 32. Held in position.

That is, the holding spring 26 urges the holding portion 24 in a direction for holding the electronic component.

Next, the structure of the release pressure supply means 14 and the clamping pressure supply means 16 will be described.

As shown in FIG. 3, the release pressure supply means 14 includes a compressor 42 and a first solenoid valve 44, and an output port 44a of the first solenoid valve 44 is connected to a flexible tube 50. Slide shaft 2 through the like
9.

The release pressure supply means 14 is provided for the slide shaft 2
A positive pressure (release pressure) is supplied to the cylinder 18 of the electronic component clamping device 12 via the pressure member 9 and the like, and the piston 20 and the pin 40 are urged downward against the urging force of the clamping spring 26, whereby the electronic pressure is released. The holding portion 24 can be driven in a direction to release the component.

The clamping pressure supply means 16 includes a compressor 42 shared with the release pressure supply means 14 and an ejector 46.
And a second solenoid valve 48 disposed between the input port 46a of the ejector 46 and the compressor 42.

The output port 46b of the ejector 46 is connected to the slide shaft 29 via a flexible tube 50 and the like, like the output port 44a of the first solenoid valve 44.

The clamping pressure supply means 16 is provided for the slide shaft 2
Negative pressure (negative pressure and negative pressure) is supplied to the cylinder 18 of the electronic component clamping device 12 through the components 9 and the like to urge the clamping portion 24 in the same direction as the biasing direction of the clamping spring 26. The supply of the clamping pressure is interrupted when the release pressure is supplied.

In FIG. 3, reference numeral 52 denotes a variable orifice, reference numeral 54 denotes a pressure sensor, and reference numeral 56 denotes an air filter.

Next, the operation when the electronic component mounting apparatus 10 holds and releases the electronic component will be described.

When holding the electronic component, first, the first electromagnetic valve 44 of the release pressure supply means 14 is driven to apply the positive pressure of the compressor 42 via the flexible tube 50, the slide shaft 29 and the like. 12 cylinders 18 are supplied.

At this time, the supply of the positive pressure from the compressor 42 to the ejector 46 is interrupted by driving the second solenoid valve 48 of the clamping pressure supply means 16.

As a result, the piston 20 is
Of the piston 20 and the pin 40 near the lower end of the piston 20 also descends.

While the pin 40 descends and slides with the notch 34 d of the swinging pawl member 34, the swinging pawl member 34 is rotated around the pin 38. Thereby, the lower end of the swinging claw 34a is separated from the fixed claw 32a while rotating.

In this state, the electronic component holding device 12 is lowered together with the slide shaft 29 so that the fixing claw 32a of the fixing claw member 32 comes into contact with the side surface of the electronic component 22, and the horizontal protruding portion 32b is attached to the upper surface of the electronic component 22. Contact.

When the electronic component holding device 12 is excessively lowered to press the horizontal protruding portion 32b against the upper surface of the electronic component 22, the excessive lowering amount is absorbed by the contraction of the buffer spring 38. 22 is not damaged.

Next, the supply of the positive pressure from the compressor 42 to the cylinder 18 is stopped by driving the first solenoid valve 44 of the release pressure supply means 14, and the interior of the cylinder 18 is released to the atmosphere. It is urged by 26 and slides upward.

As the piston 20 rises, the swinging pawl member 34 rotates via the pin 40, and the swinging pawl 34a
a and comes in contact with the side surface of the electronic component 22.

That is, the swinging claw member 34 and the fixed claw member 32 hold the electronic component 22 by the urging force of the holding spring transmitted through the piston 20 and the pin 40.

Further, when the second electromagnetic valve 48 of the clamping pressure supply means 16 is driven to supply the compressed air of the compressor 42 to the ejector 46, a negative pressure is generated in the ejector 46, and the negative pressure is generated by the flexible tube. 50, and is supplied to the cylinder 18 of the electronic component holding device 12 via the slide shaft 29 and the like.

As a result, the piston 20 is urged upward, and the urging force due to the negative pressure (clamping pressure) is transmitted to the rocking claw member 34 via the pin 40, and the rocking claw member 34 and the fixed claw member 32 Means that the electronic component 22 is sandwiched more strongly.

That is, the swinging claw member 34 and the fixed claw member 32 strongly press the electronic component 22 by the two urging forces of the urging force of the nipping spring 26 and the nipping pressure supplied from the nipping pressure supply means 16. Can be pinched.

Accordingly, the electronic component mounting apparatus 10 is a highly reliable electronic component mounting apparatus capable of stably holding electronic components even if they are relatively heavy without dropping them and mounting them on a substrate. It is.

Next, the electronic component mounting apparatus 10 transports the held electronic component 22 to a predetermined mounting position on a substrate (not shown).

When releasing the electronic component on the substrate, the second solenoid valve 48 of the clamping pressure supply means 16 is driven to cut off the supply of positive pressure from the compressor 42 to the ejector 46 and to release the pressure. The positive pressure of the compressor 42 is supplied to the cylinder 18 by driving the first electromagnetic valve 44.

As a result, the piston 20 is
Slides downward against the urging force of (1), and separates the swing claw member 34 from the electronic component 22 via the pin 40.

As a result, the electronic component 22 is released from the holding portion 24 and is placed at a predetermined mounting position on the substrate.

Thereafter, the operation of mounting the electronic parts is similarly repeated.

In the present embodiment, the holding spring 26 is a compression coil spring. However, the present invention is not limited to this. For example, the holding spring is connected to the piston at the lower end and is connected to the upper end. May be a tension coil spring connected to the slider side.

In the present embodiment, the swinging pawl member 34 moves the fixed pawl member 32 in conjunction with the lowering of the piston 20.
However, the present invention is not limited to this. For example, as in the second example of the embodiment shown in FIG. The swinging pawl member 40 may be separated. In this case, the holding spring 42 is mounted so as to urge the piston 20 downward.

Further, in the first and second examples of the above embodiment, the holding portion has a fixed claw member and a swinging claw member, but the present invention is not limited to this. Instead, it may be a holding portion configured to have a pair of swing claw members.

In the first embodiment of the present invention, the releasing pressure supply means 14 is
A positive pressure is supplied upward to urge the swing claw member 34 to the release side, but the present invention is not limited to this.
For example, a release pressure supply unit that supplies a negative pressure below the piston 20 in the cylinder 18 may be used.

Further, in the second example of the above embodiment, a clamping pressure supply means for supplying a negative pressure above the piston 20 in the cylinder 18 may be used.

Similarly, in the first example of the above embodiment, the clamping pressure supply means 16 supplies a negative pressure above the piston 20 in the cylinder 18, but for example, a positive pressure below the piston 20 in the cylinder 18. May be used as a release pressure supply means for supplying positive pressure, or in the second example of the above embodiment, a clamping pressure supply means for supplying a positive pressure above the piston 20 in the cylinder 18.

The positive / negative change of the supply pressure of the release pressure supply means or the clamping pressure supply means can be performed by using the release pressure supply means 14 in the first example of the embodiment as the clamping pressure supply means. Can be easily realized by using as the release pressure supply means.

When the clamping pressure supply means supplies a positive pressure to urge the rocking claw member to clamp the electronic component, a stronger clamping force can be obtained than when a negative pressure is supplied.

That is, in the case of a negative pressure, about 1 Mpa (1 kgf
/ Cm ² ) to urge the piston at atmospheric pressure.
By supplying a positive pressure of Mpa (2 kgf / cm ² ) to urge the piston, it is possible to obtain a double clamping force as compared with the case of supplying a negative pressure.

Further, in the first and second examples of the embodiment, the electronic component mounting apparatus 10 has the urging force of the clamping spring 26 and the urging force of the clamping pressure supply means 16 due to the clamping pressure.
Although the electronic component is clamped by the two biasing forces, the present invention is not limited to this. If the clamping spring 26 has a sufficient biasing force, the clamping pressure supply means 16 may be provided. Instead, the electronic component mounting device may hold the electronic component only by the urging force of the holding spring 26.

[0080]

According to the present invention, a relatively heavy electronic component can be stably held without increasing the size of the electronic component holding device.

[Brief description of the drawings]

FIG. 1 is a side view showing the overall structure of an electronic component mounting apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a structure of an electronic component holding device in the electronic component mounting device.

FIG. 3 is a pneumatic circuit diagram showing a structure of a release pressure supply unit and a holding pressure supply unit according to an embodiment of the present invention.

FIG. 4 is a sectional view showing a structure of an electronic component holding device according to a second example of the embodiment of the present invention;

FIG. 5 is a perspective view showing the entire structure of a conventional electronic component mounting apparatus.

FIG. 6 is a sectional view showing a structure of an electronic component holding device in the electronic component mounting device.

[Explanation of symbols]

 10, 102: electronic component mounting device 12, 100: electronic component clamping device 14: release pressure supply means 16: clamping pressure supply means 18, 114: cylinder 20, 116: piston 24, 120: clamping portion

Claims (2)

[Claims] 1. A cylinder, a piston slidable in the cylinder, and a holding portion engaged with the piston and capable of holding and releasing an electronic component in conjunction with the piston when the piston slides. An electronic component mounting device for mounting an electronic component on a substrate, comprising: a holding spring for urging the holding portion in a direction for holding the electronic component; and a positive pressure or a pressure applied to the cylinder. Supply the negative pressure release pressure,
An electronic component mounting device, comprising: a release pressure supply means capable of driving the holding portion in a direction to release the electronic component against the urging force of the holding spring. 2. A holding means according to claim 1, wherein said holding pressure is supplied to said cylinder in a direction opposite to said releasing pressure, and said holding part can be urged in the same direction as said holding spring. ,
An electronic component mounting device, comprising: a clamping pressure supply unit that shuts off the supply of the clamping pressure when the release pressure is supplied.