JP2006108199A - Suction nozzle for sandwiching electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction nozzle for sandwiching an electronic component that can stably sandwich and suck a long or heavy electronic component by increasing the holding power. <P>SOLUTION: The suction nozzle for sandwiching an electronic component is constituted of a cylindrical main body held by the nozzle holder of the head of a surface mounting machine in a freely attachable and detachable state and containing an air passage, a horizontal project provided under the main body and having a component sucking hole, and a cylinder formed in the main body. The suction nozzle is also constituted of an air pipe the lower end of which is fixed to the horizontal project and the upper end of which is arranged in the cylinder and, in addition, which communicates the component sucking hole and air passage to each other, a check valve which is installed to the air pipe to close the pipe, and a piston which is supported by the air pipe in a vertically movable state and, at the same time, the upper part of which is arranged in the cylinder in a vertically movable state. In addition, the suction nozzle is also constituted of a fixing finger provided below the main body and a rocking click member one end of which is arranged to face the fixed click and the other end of which is connected to the piston, and, in addition, which is supported in a drivable state while the member is interlocked with the piston and sandwiches and releases the electronic component with the fixed click member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a clamping suction nozzle for electronic components.

FIG. 4 shows a conventional chuck type nozzle 1, which includes a body 2 mounted on a nozzle holder of a head of an electronic component mounting apparatus, a piston shaft 3 movable in the vertical direction, and a damper having a fixed claw member 4A at the tip. The shaft 4, the swinging claw member 5 that sandwiches the electronic component, the spring 6 that pushes the piston shaft 3 upward, the spring 7 that pushes the damper shaft 4 downward, the piston shaft 3, the spring 6, the damper shaft 4, and the spring 7. 2 is provided with a screw 8 for preventing downward slipping after insertion into the pin 2, a pin 9 for interlocking the piston shaft 3 and the swinging claw member 5, and a fulcrum pin 10 for the damper shaft 4 and the swinging claw member 5.
In the chuck type nozzle 1, the piston shaft 3 is normally pushed upward by a spring 6, the finger 5 interlocked with a pin 9 is closed inside with the pin 10 as a fulcrum, and air is supplied from the nozzle holder into the nozzle 1. When the pressure is applied, the piston shaft 3 moves downward while contracting the spring 6, the swinging claw member 5 interlocked with the pin 9 rotates outward with the pin 10 as a fulcrum, and the swinging claw member 5 opens. When the pressurization is stopped, the spring force of the spring 6 works upward, the swinging claw member 5 is closed, and the electronic component P is sandwiched between the fixed claw member 4A at the tip of the damper shaft 4.

JP 2002-343531 A

        In the case of the above-mentioned Patent Document 1, the horizontal protrusion 4B of the fixed finger 4A plays a role of stabilizing the component posture of the electronic component and determining the holding height by being applied to the upper surface of the electronic component P when held. Normally, the electronic component P can be held in a state where the upper surface of the electronic component P is in close contact with the horizontal protrusion 4B. However, if the length of the electronic component P is extremely long, the electronic component does not adhere to the horizontal protrusion 4B. If the electronic component is held out of position or is heavy, it may fall.

        An object of the present invention is to provide a clamping suction nozzle for an electronic component that can securely clamp and suck the electronic component with a strong holding force.

In order to solve the above problems, the invention described in claim 1
A sandwiching and suction nozzle in a surface mounter that sandwiches and sucks electronic components and mounts them on a predetermined position on a substrate,
A cylindrical main body that is detachably held in the nozzle holder of the head of the surface mounter and has an air passage formed therein, a horizontal protrusion that is provided below the main body and has a component suction hole, and is formed in the main body. The cylinder part, the lower end is fixed to the horizontal protrusion, the upper end is arranged in the cylinder part, the air pipe that communicates the component suction hole and the air passage, and the air pipe that is always closed. A stop valve, a piston that is supported by the air pipe so as to be movable up and down, and an upper portion thereof is disposed in the cylinder portion so as to be movable up and down, a fixed claw member provided below the main body, and one end disposed opposite the fixed claw member, The other end is connected to the piston, and is configured to be configured to include a swinging claw member that is supported so as to be able to be driven in conjunction with the piston and that clamps and opens an electronic component with the fixed claw member.
The invention according to claim 2 is the structure according to claim 1, wherein the check valve is arranged at an upper end of the air pipe and a communication passage is formed in the check valve so as to communicate the cylinder portion and the air passage. .

As described above, according to the first aspect of the present invention, since the electronic component is held by the combination of the holding force by the swinging claw member and the suction force by the air, the electronic component is held with a strong holding force. The electronic component can be held without being tilted regardless of the size of the electronic component.
Moreover, even heavy electronic components can be held without fear of dropping.
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, since the check valve is a so-called floating method provided above the air pipe, the check valve structure can be made simple. , Manufacturing costs can be reduced.

(Embodiment 1)
An embodiment of the invention described in claim 1 will be described below with reference to FIGS.
FIG. 1 shows a sandwiching suction nozzle for an electronic component according to the present embodiment. As shown in FIG. 3, the nozzle is held detachably by a known hollow nozzle holder 29 of a head H of a surface mounter. It is.
The sandwiching suction nozzle 12 is engaged with a cylinder 18 formed in an air passage 17H in the cylindrical main body 17, a piston 20 slidable in the cylinder 18, and a lower end of the piston 20 in the figure. A clamping portion 24 that can clamp and release the electronic component 22 in conjunction with the sliding movement of the piston 20, and further clamps the electronic component via the piston 20. A clamping spring 26 is provided for biasing.
The cylinder 18 is formed as an interruption hole 17 </ b> A of a three-stepped hole 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 interruption hole 17A and the upper hole 17C.
The piston 20 is composed of a disk-shaped head 20A and a neck portion 20B of a substantially round bar-like body protruding coaxially downward from the lower end of the head 20A. The piston 20 is loosely fitted to the cylinder 18 at the outer periphery of the head 20A. ing.

The clamping unit 24 includes a slider 30, a fixed claw member 32 fixed to the lower end of the slider 30, and a swinging claw member 34 pivotally supported near the lower end of the slider 30.
The slider 30 is formed of a cylindrical body 30A, and a fixed claw support portion 30B and a swinging claw support portion 30C that protrude downward from the lower surface of the cylindrical body 30A.
The cylindrical body 30A loosely fits with the lower hole 17B of the main body 17 at the outer peripheral portion, and loosely fits with the neck portion 20B of the piston 20 at the center hole.
Further, a long hole 30D in the axial direction is formed in the side wall of the cylindrical body 30A, and a horizontal guide pin 36 screwed in the vicinity of the lower end of the main body 17 is inserted into the long hole 30D.
As a result, the slider 30 is slidable within a certain range in the axial direction with respect to the main body 17 and is not rotatable about the axis.
The sandwiching spring 26 is a compression coil spring arranged so as to surround the neck 20B of the piston 20, and is in contact with the upper surface of the slider 30 at the lower end, and is in contact with the lower surface of the head 20A of the piston 20 at the upper end. Energized.
The lower end of a buffer spring 38 that is a compression coil spring is in contact with the upper surface of the slider 30. The 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 stepped lower surface of the upper end of the lower step hole 17B at the upper end. As a result, the slider 30 is biased downward and protrudes to the lower limit in a normal state.

The fixed claw support portion 30B and the swing claw support portion 30C are provided symmetrically with respect to the vicinity of the lower end of the neck portion 20B of the piston 20. Further, a pin hole 30E that penetrates the side surface in the horizontal direction is formed in the swinging 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 intermediate portion of the fixed claw 32A. And a horizontal protrusion 32B that is a substantially rectangular plate-like body that protrudes toward the axis, and a through hole 32H is formed in the horizontal protrusion 32B.
The swinging claw member 34 protrudes from the both sides in the width direction of the upper end of the swinging claw 34A toward the axis line side, and the swinging claw 34A having a substantially rectangular plate-like shape disposed opposite the fixed claw 32A across the axis. It is composed of a pair of formed guide plates 34B.
These guide plates 34B are substantially rectangular plate-like bodies and are arranged to face each other across the side surface of the swinging claw support portion 30C and the lower end of the neck portion 20B of the piston 20, and are integrally connected to the upper end of the swinging claw 34A at the lower end. ing.
A horizontal pin hole 34C is formed near the end of the guide plate 34B on the swinging claw 34A side.
The swing claw member 34 is swingably supported by the slider 30 via a pin 34P penetrating the pin hole 34C and the pin hole 30E of the swing claw support portion 30C.
On the other hand, a U-shaped notch 34D is formed at the end of the guide plate 34B on the axial line side.
The swinging claw member 34 is engaged with the piston 20 via a pin 40 that is swingably fitted to the notch 34D and protrudes outward from the lower end of the piston 20. It swings in conjunction with this when sliding in the direction.
When the swinging claw member 34 swings and approaches and separates from the fixed claw member 32, the clamping unit 24 can clamp and release the electronic component 22.
The swinging claw member 34 is normally biased by the holding spring 26 via the pin 40 and the piston 20 and is held at a position where the swinging claw 34A of the swinging claw member 34 and the tip of the horizontal protrusion 32B of the fixed claw member 32 come into contact with each other. Has been.
That is, the clamping spring 26 urges the clamping part 24 in the direction in which the electronic component 22 is clamped.
41 is a hollow air pipe whose lower end is fixed to the horizontal protrusion 32B, inserted into the piston 20, and whose upper end extends in the vicinity of the cylinder 18. The piston 20 is supported by the air pipe 41 so as to be movable up and down. .
The cylinder 18 and the through hole 32H of the horizontal protrusion 32B communicate with each other via an air pipe 41.
41 </ b> B is an exhaust hole that communicates with the atmosphere provided at the lower end of the air pipe 41.
A check valve 44 including a throttle portion 42 and a sphere 43 is provided inside the air pipe 41, and the sphere 43 always closes the throttle portion 42 by its own weight.
When negative pressure is applied (during vacuum), the ball 43 is lifted up to release the throttle portion 42 and suck the electronic component.
Reference numeral 41 </ b> C is a pin provided at the upper end of the air tube 41 to prevent the ball 43 from jumping out, and is horizontally mounted on the upper end of the air tube 41.

Next, the operation when the clamping suction nozzle of the present invention holds and releases the electronic component will be described.
When pressurized air is supplied through the nozzle holder 29, the sphere 43 is pressurized to close the throttle portion 42 and the pressurized air is prevented from flowing into the air pipe 41.
For this reason, pressure is applied to the upper surface of the piston 20, the piston 20 slides downward against the urging force of the clamping spring 26, and the pin 40 near the lower end of the piston 20 is also lowered. While the pin 40 is lowered, the swinging claw member 34 is rotated about the pin 34P while sliding with the notch 34D of the swinging claw member 34. As a result, the lower end of the swinging claw 34A is separated from the fixed claw 32A while rotating.
In this state, the suction nozzle is lowered together with the nozzle holder 29 so that the fixed claw 32A of the fixed claw member 32 is brought into contact with the side surface of the electronic component 22 and the horizontal protrusion 32B is brought into contact with the upper surface of the electronic component 22.
Next, when the supply of pressurized air is stopped and the inside of the cylinder 18 is released to the atmosphere, the piston 20 is urged by the holding spring 26 and slides upward.
As the piston 20 moves up, the swinging claw member 34 rotates via the pin 40, and the swinging claw 34a contacts the side surface of the electronic component 22 while approaching the fixed claw 32a. That is, the swinging claw member 34 and the fixed claw member 32 clamp the electronic component 22 by the biasing force of the clamping spring 26 transmitted via the piston 20 and the pin 40.
Next, negative pressure is supplied to the cylinder 18 through the nozzle holder 29.
As a result, an upward force is applied to the ball 43, the throttle portion 42 of the check valve 44 is released, and the air pipe 41 has a negative pressure, and the electronic component 22 passes through the through hole 32H of the horizontal protrusion 32B. Adsorption is performed so that the upper surface is in close contact with the lower surface of the horizontal protrusion 32B.
That is, the electronic component can be strongly clamped by the clamping force of the swinging claw member 34 and the fixed claw member 32 and the negative pressure supplied to the air pipe 41.
Therefore, even a relatively long or heavy electronic component can be stably held without being dropped and mounted on the substrate.
Next, the head moves to convey the electronic component 22 to a predetermined mounting position on a substrate (not shown).
When releasing the electronic components on the substrate, pressurized air is supplied to the cylinder 18.
As a result, the piston 20 slides downward against the urging force of the clamping spring 26, and the swinging claw member 34 is separated from the electronic component 22 via the pin 40, and the ball 43 closes the throttle portion 42. The negative pressure in the air pipe 41 is discharged to the atmosphere through the clearance between the electronic hole 22 and the through hole 32H by releasing the holding force of the exhaust hole 41B and the claw member. As a result, the electronic part 22 is released from the holding suction nozzle, It is placed at a predetermined position on the substrate.

In this embodiment, the reverse support valve 44 is disposed in the air pipe 41. However, the reverse support valve 47 may be disposed at the upper end of the air pipe 41 as shown in FIG.
FIG. 2 is a partially omitted cross-sectional view showing another embodiment of the present invention, and the configuration subsequent to the cylindrical body 34A is omitted because it is the same as the configuration shown in FIG.
Further, the pin 41C of the air tube 41 in FIG.
That is, in this embodiment, a cylindrical valve 46 having a conical tip in the upper hole 17C of the main body 17 and having an air passage 45 communicating with the cylinder 18 and the upper hole 17C is supported in a vertically movable manner. Alternatively, a valve having a configuration in which an end portion in the shape of the air pipe 41 is disposed at the upper end of the air pipe 41, that is, a floating back valve 47 may be used.
In the case of this embodiment, the back support valve 47 is lowered by pressurized air to close the upper end of the air pipe 41 and the piston 20 is lowered via the air passage 45 to open the swinging claw member 34. Parts are released.
On the other hand, as shown in FIG. 2, the reverse support valve 47 is lifted by negative pressure air to open the upper end of the air pipe 41 to make the air pipe 41 have a negative pressure, and the inside of the cylinder 18 is made negative through the air passage 45. The piston 20 is raised and the swinging claw member 34 is closed, and the electronic component is attracted by the negative pressure and the electronic component is held by the swinging member 34.

Sectional drawing which shows the principal part which shows 1st Embodiment of the clamping suction nozzle of this invention Partially omitted sectional view showing a second embodiment of the sandwiching suction nozzle of the present invention The figure which shows the relationship between the clamping suction nozzle of this invention, and a head. Partial sectional view of a conventional chuck type nozzle

Explanation of symbols

17 Body 18 Cylinder 20 Piston 34 Swing claw member 44, 47 Check valve

Claims (2)

A sandwich suction nozzle in a surface mounter that sandwiches and sucks an electronic component and mounts it on a predetermined position on a substrate,
A cylindrical main body that is detachably held in the nozzle holder of the head of the surface mounter and has an air passage formed therein, a horizontal protrusion that is provided below the main body and has a component suction hole, and is formed in the main body. The cylinder part, the lower end is fixed to the horizontal protrusion, the upper end is arranged in the cylinder part, the air pipe that communicates the component suction hole and the air passage, and the air pipe that is always closed. A stop valve, a piston that is supported by the air pipe so as to be movable up and down, and an upper portion thereof is disposed in the cylinder portion so as to be movable up and down, a fixed claw member provided below the main body, and one end disposed opposite the fixed claw member, A sandwiching suction nozzle in a surface mounting machine comprising: a swinging claw member having a second end connected to a piston and supported so as to be able to drive in conjunction with the piston, and sandwiching and releasing an electronic component with the fixed claw member. 2. The sandwich adsorption in the surface mounter according to claim 1, wherein the check valve is disposed at an upper end of the air pipe, and a communication passage is formed in the check valve to communicate the cylinder portion and the air passage. nozzle.

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