JP4089084B2 - Component adsorption device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component suction device that has a suction nozzle and that holds and transports a component such as a so-called chip component at the tip of the suction nozzle with a negative pressure inside the suction nozzle.
[0002]
[Prior art]
Conventionally, as shown in FIG. 7, it has a tubular suction nozzle 101, and the suction nozzle 101 has a negative pressure, and a component such as a so-called chip component is sucked and held at the tip of the suction nozzle 101. A component suction device has been proposed. Such a component suction device is used when a chip component is transported to a predetermined mounting position on an electronic substrate and positioned in an assembly process of the electronic device.
[0003]
A reflection member 107 is externally fitted and attached to the suction nozzle 101 by being screwed onto the suction nozzle 101. The reflecting member 107 reflects light incident from the tip side of the suction nozzle 101 toward the tip side.
[0004]
In this component suction device, as shown in FIG. 8, a CCD (solid-state imaging device) camera 103 or the like from the tip side of the suction nozzle 101 in a state where the tip component 102 is sucked to the tip portion of the suction nozzle 101. Then, the position of the chip component 102 is detected by image processing and image processing of the output signal from the CCD camera 103.
[0005]
Based on such position detection of the chip component 102, the chip component 102 can be accurately positioned.
[0006]
[Problems to be solved by the invention]
By the way, in the component suction device as described above, the projected area viewed from the front end side of the front end portion 105 of the suction nozzle 101 is made larger than the projected area of the component 102 sucked by the front end portion of the suction nozzle 101. Was impossible. In the transmission binary image recognition, as shown in FIG. 9, the side portion of the suction nozzle 101 that appears to protrude from the component 102 is recognized as a shadow, and is erroneously recognized as a part of the component 102. This is because recognition processing is performed.
[0007]
Therefore, the outer diameter of the suction nozzle 101 is limited so that it does not protrude beyond the part 102 to be sucked from the base end side to the tip end side. As a result, in the suction nozzle for sucking small parts, both the inner and outer diameters have to be reduced, and the suction efficiency has become inferior.
[0008]
Further, if the inner diameter of the suction nozzle is thin, the air path in the pipe also becomes thin, and clogging due to dust or the like is likely to occur, so that the suction quality and the suction rate are deteriorated. For this reason, when the inner diameter of the suction nozzle is thin, periodic cleaning is required, resulting in an operating loss of the equipment. In this cleaning, since the suction nozzle is thin, careful work is required, and in some cases, the suction nozzle may be bent.
[0009]
Further, the reflection member 107 has a groove 106 parallel to the axis of the suction nozzle 101 into which a jig for rotating the reflection member 107 with respect to the suction nozzle 101 is fitted. Each groove 106 is a through-groove that is opened from the distal end side to the proximal end side of the suction nozzle 101. Since the groove portion 106 penetrates toward the proximal end side of the suction nozzle 101, the reflection efficiency of the entire reflection member 107 is lowered as shown in FIG.
[0010]
In the conventional component suction device, as shown in FIG. 8, the irradiation position of the halogen lamp 104, which is a light source when photographing with the CCD camera 103 or the like, is reflected by the light transmitted through the reflecting plate (light transmitted through the reflecting member 107). The amount of light is insufficient, and there is a risk of erroneous recognition due to dirt or the like.
[0011]
Therefore, the present invention has been proposed in view of the above-described circumstances, and it is possible to prevent the suction efficiency from being deteriorated due to the narrowing of the suction nozzle and to prevent the operation loss and damage for cleaning work. It is an object of the present invention to provide a component suction device capable of accurately detecting the position of a component sucked at the tip of the head using a CCD camera.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a tubular hollow suction nozzle, and is fitted on the tip side of the suction nozzle and screwed to the suction nozzle, and is attached to the tip side of the suction nozzle. A component adsorbing device that has a reflecting member that reflects incident light toward the tip side, and that adsorbs the component to the tip of the suction nozzle using a negative pressure inside the suction nozzle. The nozzle has a continuous taper shape in which the inside shape of the tube extends from the proximal side to the distal side, and the distal side is reduced in diameter.
The reflecting member has a groove portion parallel to the axis of the suction nozzle with which a jig for rotating the reflecting member with respect to the suction nozzle is fitted, and each groove portion is directed toward the tip side of the suction nozzle. And the base end side of the suction nozzle is closed .
[0013]
Further, the suction nozzle is characterized in that the outer shape is a tapered shape whose diameter is reduced at the tip side, and the outer peripheral surface portion is mirror-finished.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
As shown in FIG. 1, the component suction device according to the present invention has a removable suction nozzle 1 formed in a tubular shape, and the tip of the suction nozzle 1 is made by making the suction nozzle 1 have a negative pressure. This is a device that holds and conveys a component such as a so-called chip component in a part, and is configured as a so-called high-speed chip mounting machine.
[0016]
The suction nozzle 1 of this component suction device is set in the nozzle block 2 of the main body of this component suction device. As shown in FIG. 2, the suction nozzle 1 is configured such that a tubular shaft portion 3 and a distal end side portion 4 are coaxially connected to each other, but the in-tube shape extends from the proximal end side to the distal end side. The tip end side has a continuous taper shape with a reduced diameter. Further, the inner surface portion of the suction nozzle 1 in the tube is formed of a continuous surface having no step from the proximal end side to the distal end side.
[0017]
As described above, the inner surface of the suction nozzle 1 in the pipe is processed to have a step-free shape, and since it has a taper shape having a certain direction with respect to the air flow direction, an efficient air flow is achieved. The flow of is realized. That is, when this suction nozzle 1 is used, as shown by a solid line in FIG. 3, for example, a time shorter by about 5 msec to 10 msec than when a suction nozzle of a conventional component suction device indicated by a one-dot chain line is used. Thus, the inside of the tube can be set to a predetermined negative pressure. Further, the base end side is also tapered so that the air resistance at the joint with the nozzle block 2 is suppressed.
[0018]
As shown in FIG. 2, in the suction nozzle 1, the outer shape of the tip end portion 4 has a tapered shape in which the tip end is reduced in diameter, and the outer peripheral surface portion is mirror-finished. The taper-shaped opening angle formed by the outer shape of the tip side portion 4 of the suction nozzle 1 is set to 18 ° to 20 °. Moreover, the mirror surface process of the outer peripheral surface of the front end side part 4 is a process which makes surface roughness 0.2S or less.
[0019]
A reflecting member 5 is externally fitted and attached to the suction nozzle 1 by being screwed onto the suction nozzle 1. The reflecting member 5 reflects light incident from the tip side of the suction nozzle 1 toward the tip side. The reflecting member 5 has a groove 6 parallel to the axis of the suction nozzle 1 into which a jig for rotating the reflecting member 5 with respect to the suction nozzle 1 is fitted. Each groove portion 6 is opened toward the distal end side of the suction nozzle 1 and the proximal end side of the suction nozzle 1 is closed. Since the groove 6 does not penetrate toward the proximal end side of the suction nozzle 1, the reflection efficiency of the entire reflection member 5 can be increased by reflection of the bottom surface portion of the groove 6.
[0020]
In this component suction device, as shown in FIG. 4, a component (chip component) 102 is sucked at the tip of the suction nozzle 1. At this time, the inside of the nozzle is switched from atmospheric pressure to negative pressure by the action of the mechanical valve, and the component 102 is adsorbed.
[0021]
In this suction nozzle 1, as shown in FIG. 3, the rise of the negative pressure is accelerated due to the effect that the pipe resistance is reduced, and the tip side portion 4 of the suction nozzle 1 allows the parts to be secured with a high suction pressure secured. Can be adsorbed. For example, even in a mounting machine that performs high-speed operation with an adsorption time of about 0.15 sec, there is no operation of adsorbing the component before the negative pressure rises, and the component is missed or the component moves after the adsorption And a stable suction posture can be realized.
[0022]
After the component 102 is attracted, the external shape of the component 102 is recognized by the CCD camera 103 as shown in FIG. At this time, as shown in FIG. 5, the light from the halogen lamp 104 is not absorbed even though the tip diameter 4 of the tip 4 of the suction nozzle 1 is larger than that of the component 102. Good recognition can be achieved without the shadow of the outer peripheral surface portion.
[0023]
That is, in this suction nozzle 1, the outer peripheral surface portion of the tip end side portion 4 is mirror-finished, so that the outer diameter of the nozzle is increased and the outer peripheral surface portion protrudes from the part sucked by the tip portion of the suction nozzle 1. Even if it is visible, it is not recognized as a shadow, and a good recognition process can be performed. Therefore, as shown in FIG. 1, the suction nozzle 1 can be formed in various shapes corresponding to the shape and size of the component. In addition, the suction nozzle 1 can increase the opening angle of the tapered shape formed by the outer shape and the inner peripheral surface portion, and can have a pipe shape having an ideal air path.
[0024]
Further, in this component suction device, the light from the halogen lamp 104 is changed from the conventional reflector transmission method to the reflector reflection method (method of illuminating with the light reflected by the reflection member 5). The influence of the shadow of the suction nozzle 1 itself can be minimized, the brightness difference between the component and the background can be increased, and the recognition can be stabilized. That is, in the recognition of the component image, by changing the irradiation position of the illumination light, it is possible to reduce erroneous recognition due to erroneous recognition factors such as dirt and dust.
[0025]
As shown in FIG. 6, this component suction device is supported by a rotary head 109, and at a position A in FIG. 6, the taped component 102 is supplied from the component supply unit 108 and sucked. By rotating the rotary head 109, the position of the component 102 in the X-axis, Y-axis, and O-axis directions is recognized at the component recognition position (B position) and the rotation correction position through the mounting direction selection position and the suction inspection position. It is corrected based on the data. Then, the adsorbed component is mounted on the substrate surface at the component mounting position (C position). At this time, the inside of the suction nozzle 1 is switched from negative pressure to atmospheric pressure, and the component 102 is separated from the suction nozzle 1, but in this case as well, since the resistance in the tube is reduced, the atmosphere can be quickly released to the atmosphere. Timing suitable for high-speed mounting can be obtained. The substrate is supplied from the loading unit 111, the component 102 is mounted in the substrate transport unit 110, and is transported to the unloading unit 112. The component suction device that has opened the component 102 returns to the position A in FIG. 6 through the defective product discharge position, the nozzle select position, the nozzle origin return position, and the nozzle check position by the rotation of the rotary head 109.
[0026]
In the handling of the suction nozzle, the eccentricity (bending) has conventionally occurred 5/100 mm or more with an impact load of 600 gf to 900 gf, but in the present invention, the suction nozzle has an enlarged tapered shape. This makes it possible to have an impact resistance of 2000 gf or more. Further, the adsorption rate can be improved by 0.2 to 0.35 points. As a result, it is possible to reduce scraps and improve production efficiency.
[0027]
Furthermore, since the inner diameter of the suction nozzle is increased, the occurrence of clogging due to dirt or the like is reduced, and the regular cleaning cycle can be increased by three times or more as compared with the conventional one, so that productivity can be improved.
[0028]
【The invention's effect】
As described above, in the component suction device according to the present invention, the in-pipe resistance of the air flowing through the suction nozzle is reduced, an efficient air flow is ensured, and stable component suction can be performed. Further, since the inner hole of the suction nozzle has a tapered shape, the step with the inner holder is reduced at the fitting portion on the nozzle base end side, and the air flow efficiency can be improved. Therefore, it is possible to stabilize the suction posture of the components, improve accuracy during mounting, and reduce quality defects.
[0029]
Further, there is no hindrance to the reflection of the halogen lamp light that becomes a light source when photographing with a CCD camera or the like, the reflectance becomes uniform, and the generation of shadows can be prevented. Furthermore, in the component suction device according to the present invention, the reflecting member is externally fitted on the tip side of the suction nozzle and is screwed onto the suction nozzle and is attached to the suction nozzle for rotation. By having a groove portion parallel to the axis of the suction nozzle to which the jig is fitted, each groove portion is open toward the distal end side of the suction nozzle, and the proximal end side of the suction nozzle is closed, Since this groove portion does not penetrate toward the proximal end side of the suction nozzle, the reflection efficiency of the entire reflecting member can be increased by reflection of the bottom surface portion of this groove portion.
[0030]
In other words, the present invention prevents the suction efficiency from being deteriorated due to the narrowing of the suction nozzle and the operation loss and damage due to the cleaning work, and the position of the part sucked at the tip of the suction nozzle is determined by the CCD camera. It is possible to provide a component suction device that can be used and accurately detected.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a main part of a component suction device according to the present invention.
FIG. 2 is a longitudinal sectional view showing a configuration of a suction nozzle of the component suction device.
FIG. 3 is a graph showing a change in pressure in a suction nozzle in the component suction device and the conventional component suction device.
FIG. 4 is a side view showing a state in which a component is sucked in the component suction device.
FIG. 5 is a bottom view showing a state in which a component is sucked in the component sucking device.
FIG. 6 is a plan view showing a device for mounting components using the component suction device.
FIG. 7 is a longitudinal sectional view showing a configuration of a suction nozzle of a conventional component suction device.
FIG. 8 is a side view showing a state in which a component is sucked in the conventional component sucking device.
FIG. 9 is a bottom view showing a state in which a component is sucked in the conventional component sucking device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Adsorption nozzle, 2 Nozzle block, 3 Shaft part, 4 Tip side part, 5 Reflective member, 6 Groove part, 102 Parts, 103 CCD camera, 104 Halogen lamp

Claims (5)

Tubular hollow suction nozzle , fitted on the tip side of the suction nozzle and screwed onto the suction nozzle, and reflected from the tip side of the suction nozzle toward the tip side and a reflecting member that, within the suction nozzle to a negative pressure, a component suction device for adsorbing components to the tip portion of the adsorber nozzle,
The suction nozzle has a continuous taper shape in which the shape of the tube extends from the proximal end side to the distal end side, and the distal end side is reduced in diameter .
The reflection member has a groove portion parallel to the axis of the suction nozzle to which a jig for rotating the reflection member with respect to the suction nozzle is fitted.
Each said groove part is open | released toward the front end side of the said suction nozzle, and the base end side of this suction nozzle is obstruct | occluded, The component suction apparatus characterized by the above-mentioned.   2. The component suction device according to claim 1, wherein the inner surface of the suction nozzle is formed by a continuous surface extending from the proximal end side to the distal end side.   2. The component suction device according to claim 1, wherein the suction nozzle has a tapered shape with an outer shape reduced in diameter at the tip side, and the outer peripheral surface portion is mirror-finished. 4. The component suction device according to claim 3 , wherein an opening angle of the tapered shape formed by the outer shape of the suction nozzle is 18 to 20 degrees. 4. The component suction device according to claim 3 , wherein the mirror surface processing of the outer peripheral surface of the suction nozzle is a processing for setting the surface roughness to 0.2 S or less.

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