JPH08204390A - Parts suction nozzle - Google Patents

Abstract

PURPOSE: To provide a parts suction nozzle having a reflecting means formed by a simple structure, without forming a light reflecting film on a photoconductor. CONSTITUTION: A reflective sheet 51 is held between a flange 47 and photoconductor 48 of a main body 41 of nozzle and the flange is fitted into the photoconductor to form an assembly with the fixed sheet 51. This omits the steps of painting, adhering and drying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component suction nozzle,
In particular, the present invention relates to a component suction nozzle that holds a component by suction through a suction hole provided at the tip.

[0002]

2. Description of the Related Art Mount machines are used for manufacturing electronic circuits. The mount machine sucks and holds a component by a component suction nozzle, and mounts the sucked component at a predetermined position on a circuit board. If the components to be mounted are not mounted on the circuit board in the correct orientation, the leads of the components will not be properly connected to the connecting lands of the circuit board.

Therefore, a television camera or the like is used to detect whether or not the component sucked by the component suction nozzle is in the correct posture, and if it is not in the correct posture, the component is discharged without being mounted. It was

[0004]

In order to detect the orientation of a component by the above television camera, a component guide nozzle is provided with a light guide, and the component attracted by this light guide is irradiated from the opposite side to the camera. By doing so, it becomes possible to capture the picked-up parts as a shadow by the camera. In this case, if a reflective film is formed on the back surface of the light guide and light is reflected by this reflective film, a clearer shadow of the component can be obtained.

However, when a reflection film is formed on the light guide of the component suction nozzle, a coating process for forming the reflection film on the light guide and a step of drying the coated film are required. Therefore, the manufacturing process becomes complicated and the time required for manufacturing increases. Further, when the paint for forming the reflecting surface adheres to the incident surface of the light guide, there is a problem that the incident light is blocked.

The present invention has been made in view of the above problems, and provides a light guide body in which a shadow of a component can be clearly formed without forming a reflective film by painting. An object of the present invention is to provide a component suction nozzle provided with the component suction nozzle.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a nozzle body having a suction hole for vacuum suction of a component at a tip portion thereof, which is formed with a flange and is received by the flange. In this state, attach a transparent or semi-transparent light guide to the tip of the nozzle body with respect to the flange so that the parts held at the tip of the nozzle body form a shadow. The light is incident from the outside, and the reflecting means is attached so as to be sandwiched between the flange and the light guide, and the light incident on the light guide is reflected by the reflecting means. By this, a clearer shadow of the part is formed.

The reflecting means may be composed of metal foil, paper, a sheet of synthetic resin, or a laminated sheet thereof. Further, the flange and the light guide body, which sandwich the reflecting means, may be press-fitted to each other.

The light guide body for forming a shadow of the component when light is incident from the outside may be made of semitransparent synthetic resin, and the outer peripheral surface thereof may form the light incident surface. Further, the nozzle body may have a tapered shape in which a tip end side where the suction hole is opened is thin, and a flange may be provided on a base end side.

[0010]

The components to be mounted are vacuum-sucked and suction-held by the suction holes opened at the tip of the nozzle body. At this time, light is incident from the outside on the light guide mounted on the tip side of the nozzle body with respect to the flange, and part of the incident light is sandwiched between the flange and the light guide. Is reflected by the reflecting means, and the above light forms a shadow of the component.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows in principle the overall structure of an electronic component mounting apparatus according to an embodiment of the present invention.
The plurality of component cassettes 10 are arranged side by side on the moving table 11. The movable table 11 is supported by a pair of guide rods 12 so as to be movable in the longitudinal direction thereof, and a feed screw 13 is engaged with the movable table 11. In addition, the feed screw 13 is driven by the motor 14, so that the movable table 11 is moved in the length direction of the guide rod 12.

A rotary table 17 is provided in front of the movable table 11.
Are arranged, and are rotated intermittently around the support shaft 18. A plurality of, for example, ten component holding units 19 are provided on the rotary table 17 along the circumferential direction. These holding units 19 are provided with suction nozzle units 20 for holding electronic components on the lower end side thereof. As shown in FIG. 2, each suction nozzle unit 20 is provided with four suction nozzles 40, for example. The number of suction nozzle units 20 does not necessarily have to be 10, and may be 16 or 24, for example. Further, each nozzle unit 20 does not necessarily have to hold four nozzles 40, and may have six nozzles.

A gear 21 is provided on the upper end side of the suction nozzle unit 20. The gear 21 is an actuator 22.
The gear 23 and the gear 25 of the actuator 24 are engaged with each other to drive the suction nozzle unit 20. A television camera 26 is arranged at a predetermined position below the turntable 17, and the television camera 26 recognizes the electronic components held by the suction nozzle 40.

A circuit board 30 on which electronic components are mounted is arranged on an XY table 31. The table 31 is guided by the guide rod 32, and is moved by the actuator 33 in the length direction of the guide rod 32, that is, the X direction. The base 34 supporting the guide rod 32 is guided by the guide rod 35,
The actuator 36 is moved in the Y-axis direction.

FIG. 3 shows the operation of the component holding unit 19 in each station in accordance with the rotation of the rotary table 17 of the electronic component mounting apparatus. In the station 1, an arbitrary component suction nozzle 40 of the suction nozzle unit 20 sucks and holds a component from a predetermined cassette 10. The selection of the cassette 10 is achieved by feeding the movable table 11 along the rail 12 by the motor 14 via the feed screw 13.

When ten component holding units 19 are provided on the rotary table 17, the rotary table 17 has three units.
The rotation is intermittently driven every 6 °, and the nozzle 40 adsorbs the component at the station 1. Next, at the station 2, whether or not the component suction nozzle 40 correctly holds the component, that is, the presence or absence of the component is detected. At the next station 3, the angular displacement of the parts is corrected and the actuator 22
The deviation of the rotation direction of the component is corrected by. After this, in the next station 4, the posture of the component, that is, the component standing is detected.

The components correctly adsorbed at the station 6 are released and mounted on the circuit board 30. At this time, X-
The stop position of the circuit board 30 is changed by moving the Y table 31 in the X-axis direction and the Y-axis direction, respectively.

The station 7 detects the number of the nozzle 40 which holds the component which is not mounted correctly, and releases such a component at the station 8 to discharge it. Then, the nozzle is replaced at the next station 9 and, thereafter, the origin of the nozzle is returned by the actuator 24 at the station 10 to prepare for the next cycle.

Next, the structure of the component suction nozzle used in such a mounting apparatus will be described with reference to FIGS. The component suction nozzle 40 includes a nozzle body 41. The nozzle body 41 is made of, for example, stainless steel, and the tip side thereof is composed of a tapered holding portion 42, and a suction hole 43 is formed so as to penetrate the holding portion 42 in the axial direction. Na suction hole 43
The chip component 55 is vacuum-sucked and held at the tip. By making the holding portion 42 tapered, it is possible to hold a smaller chip component 55. Further, a concave portion 44 composed of a circumferential groove is formed on the outer peripheral portion of the nozzle body 41 on the proximal end side, and the concave portion 44 chucks the component suction nozzle 40.

A flange 47 is formed on the nozzle body 41, and a light guide 48 made of milky white or translucent acrylic resin is attached to the end of the tapered holding portion 42 with respect to the flange 47. It is like this. The lower surface of the flange 47 is preferably roughened by knurling. The light guide 48 has a circular recess 49 on its upper surface, and a center hole 50 is formed in the center. The tapered holding portion 42 is inserted through the center hole 50 and fitted therein.

A reflection sheet 51 is sandwiched between the flange 47 and the bottom of the circular recess 49 of the light guide 48. The reflection sheet 51 may have, for example, a laminated structure of a synthetic resin film and an aluminum foil, and has a function of reflecting the light incident on the light guide 48 downward. And the flange 47 and the light guide 4
The flange 47 is fitted to the inner peripheral surface of the circular recess 49 of the light guide 48 and is coupled to each other in a state in which the reflection sheet 51 is sandwiched by 8 and 8.

As described above, the component suction nozzle used in the mount machine of this embodiment discharges the air in the suction hole 43 of the nozzle 40 by a vacuum device, as shown in FIG. 5, and holds the chip component 55 in a tapered shape. The tip of the portion 42 is sucked and held. The LED 52 is arranged on the side surface of the light guide 48 attached to the lower side of the flange 47 of the nozzle body 41.
The light emitted from the LED 52 enters the inside from the side surface of the light guide 48 as shown in FIG. This light is reflected downward by the reflection sheet 51. Therefore, when viewed from below, the component 55 forms a shadow (silhouette) due to the background of the light guide body 48 that is brightened by the incident light.

By capturing such a state with the television camera 26 arranged below the nozzle 40 and performing the binarization process, an image of the outer shape of the electronic component 55 as shown in FIG. 6 can be obtained. Note that the projecting portion that projects laterally in this image is the shadow of the lead. Such an image is used for recognizing an angle and position coordinates when the component suction nozzle 40 suctions the chip component 55.

In particular, in this component suction nozzle, the reflection sheet 51 is used as the reflection means located on the upper surface side of the light guide 48. The reflection sheet 51 may be made of metal foil, paper, or synthetic resin sheet. Alternatively, it may be a laminate sheet of two or more of these materials. Then, the reflection sheet 51 is manufactured into a predetermined shape, for example, a circular shape by a punching process.

The nozzle body 41 has a flange 47 having substantially the same diameter as the reflection sheet 51. On the other hand, the light guide 48 has a diameter larger than that of the reflection sheet 51, and is provided with a circular recess 49 that is fitted to the reflection sheet 51 and the flange 47 on the upper surface thereof. Therefore, the flange 47
By press-fitting and fitting the circular recess 49 of the light guide 48, the reflection sheet 51 can be fixed to the nozzle body 41 while being sandwiched between the flange 47 and the light guide 48. . That is, it is not necessary to fix the reflection sheet 51 with an adhesive, and it is possible to attach the reflection sheet 51 to the component suction nozzle 40 with sufficient strength. Alternatively, it is not necessary to form a reflective film on one surface of the light guide 48 by painting.

In this way, the component suction nozzle 40 of this embodiment
According to the method, the step of coating for forming the reflection film on one surface of the light guide 48 and the step of drying the coating material are unnecessary. Alternatively, no adhesive fixing is required, thus eliminating the time required for the adhesive to cure.
Further, since no adhesive is used to attach the light guide 48, no adhesive or paint adheres to the outer surface of the light guide 48, particularly the outer peripheral surface thereof, which is the light incident surface. It does not block the incident light. Also the flange 47
Since the coupling of the light guide body 48 with respect to is achieved by a simple press-fitting, it is possible to assemble with a simple press-fitting jig.

When a soft material such as high quality paper is used as the reflection sheet 51, the nozzle body 4 is assembled at the time of assembly.
1 and the light guide 48 respectively act as a punch and a die, and the punching step of the reflection sheet 51 can be omitted. Therefore, the workability is improved and the cost of the suction nozzle device can be reduced.

Next, a modification of the above embodiment will be described with reference to FIG. In this modified example, the structure of press-fitting the flange 47 and the light guide 48 is the reverse of that of the above-described embodiment, and a circular recess 49 is formed on the flange 47 side, and the recess 49 is fitted into the circular recess 49. As described above, a circular convex portion is formed on the upper surface of the light guide body 48, and the convex portion is fitted into the circular concave portion 49 of the flange 47.

Also in such a modification, the flange 47 and the light guide 48 are press-fitted and fitted together with the reflection sheet 51 sandwiched between the flange 47 and the light guide 48. Therefore, it is possible to obtain the same effects as those of the above embodiment.

[0030]

According to the present invention, a flange is provided on the nozzle body, and a transparent or semitransparent light guide is attached to the front end side of the nozzle body with respect to the flange while being received by the flange. The light held from the outside is made incident on the light guide so that the component held by the light is shaded, and the incident light is reflected by the reflection means attached so as to be sandwiched between the flange and the light guide. It was made to let.

According to such a component suction nozzle, it is not necessary to form a reflection film on one end surface of the light guide by painting, and thus the manufacturing process of the component suction nozzle can be simplified. Further, since there is little risk that the light guide body is contaminated by the paint, the light incident from the outside will not be blocked by the paint.

If the reflecting means is made of metal foil, paper, a sheet of synthetic resin, or a laminated sheet of these, it becomes possible to assemble the component suction nozzle with the reflecting means at a low cost.

According to the construction in which the flange and the light guide body are press-fitted to each other by sandwiching the reflection means, the assembly of the component suction nozzle is facilitated and the step of adhering with an adhesive is not necessary.

When the light guide is made of a semitransparent synthetic resin and its outer peripheral surface is used as a light incident surface, a vacuum is applied to the tip of this component suction nozzle by the light from the illumination means provided on the side. It is possible to clearly form the shadow of the part that is sucked and held.

By making the nozzle body into a tapered shape in which the tip end side where the suction hole is opened is thin, it is possible to reduce the diameter of the part holding nozzle of the part suction nozzle, in particular. It can hold even small parts.

[Brief description of drawings]

FIG. 1 is a perspective view showing the principle of the entire configuration of a mount machine.

FIG. 2 is a plan view showing the structure of a suction nozzle unit.

FIG. 3 is a plan view showing the operation of each station of the rotary table.

FIG. 4 is an exploded perspective view of a component suction nozzle.

FIG. 5 is a vertical cross-sectional view of a component suction nozzle.

FIG. 6 is a plan view showing shading of parts obtained by the television camera.

FIG. 7 is a vertical cross-sectional view of a component suction nozzle according to a modified example.

[Explanation of symbols]

 10 Component Cassette 11 Moving Base 12 Guide Rod 13 Feed Screw 14 Motor 17 Rotary Table 18 Spindle 19 Component Holding Unit 20 Adsorption Nozzle Unit 21 Gear 22 Actuator 23 Gear 24 Actuator 25 Gear 26 TV Camera 30 Circuit Board 31 XY Table 32 Guide rod 33 Actuator 34 Base 35 Guide rod 36 Actuator 40 Component suction nozzle 41 Nozzle body 42 Tapered holding portion 43 Suction hole 44 Recess (circumferential groove) 47 Flange 48 Light guide 49 Circular recess 50 Center hole 51 Reflective sheet 52 LED 55 Chip parts

Claims (5)

[Claims] 1. A nozzle main body having a suction hole for vacuum suction of a component at a tip, a flange provided on the nozzle main body, and the nozzle main body with respect to the flange in a state of being received by the flange. A transparent or semi-transparent light guide, which is attached to the tip end side of the nozzle body, and which receives light from the outside so that the component held at the tip end of the nozzle body forms a shadow, and the flange and the light guide body. And a reflection means attached so as to be sandwiched between the component suction nozzles. 2. The component suction nozzle according to claim 1, wherein the reflecting means is composed of a metal foil, paper, a synthetic resin sheet, or a laminated sheet thereof. 3. The component suction nozzle according to claim 1, wherein the flange and the light guide body are press-fitted to each other while sandwiching the reflection means. 4. The component suction nozzle according to claim 1, wherein the light guide body is made of a semitransparent synthetic resin, and an outer peripheral surface thereof serves as a light incident surface. 5. The component suction device according to claim 1, wherein the nozzle body has a tapered shape in which a tip end side where a suction hole is opened is thin, and the base end side is provided with the flange. nozzle.