JP2013184281A - Vacuum suction nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum suction nozzle of an electronic component holding device, the nozzle body of which can be exchanged using a permanent magnet by single action.SOLUTION: A vacuum suction nozzle 1 is composed of a nozzle holder 3 having a large-diameter insertion hole 3a and a small-diameter through hole 3e which form a stepped portion 3b, an annular permanent magnet 4 inserted into and fixed on the inner wall of the insertion hole 3a and the stepped portion 3b which are formed in the nozzle holder 3, and a nozzle body 2 inserted into and fixed on the small-diameter through hole 3e of the nozzle holder 3, wherein the nozzle body 2 is attached to or detached from the nozzle holder 3 by single action using a magnetic force of the permanent magnet 4.

Description

  The present invention relates to a vacuum suction nozzle used for an electronic component holding device, and more particularly to a vacuum suction nozzle that can be replaced with a single touch using a permanent magnet.

  As shown in FIG. 6, the electronic component holding device 10 using a vacuum suction nozzle for electronic components such as semiconductor chips and crystal resonators holds a small electronic component W by suction at the tip of the vacuum suction nozzle 20, It is a device that transports to a mounting work position or the like.

  As shown in FIG. 6, this type of conventional electronic component holding device 10 includes a nozzle holding mechanism 30 that detachably holds a vacuum suction nozzle 20 that sucks and holds an electronic component W, and a vacuum together with the nozzle holding mechanism 30. A nozzle lifting mechanism 40 that reciprocates the suction nozzle 20 in the vertical direction (Z direction), an angle adjustment mechanism 50 that adjusts the angle of the vacuum suction nozzle 20 around the Z-axis direction, and the vacuum suction nozzle 20 And an intake air supply mechanism 60 that sucks air from the front end of the frame 11. The frame 11 supports the mechanisms 30, 40, 50, and 60, and the frame 11 extends along two directions parallel to the horizontal plane H and perpendicular to each other. It comprises a moving mechanism (not shown) that moves.

  The vacuum suction nozzle 20 of this type of conventional electronic component holding device is simply formed by forming a screw hole in the nozzle holding mechanism 30 and attaching it with a screw. Alternatively, as shown in FIG. 7, a through-hole 22 is formed along the longitudinal direction, and a tubular member 21 is provided at one end of the vacuum suction nozzle 2 in the longitudinal direction. A frustoconical insertion protrusion 33 is formed at the other end, and the insertion protrusion 33 is inserted into the tapered outer peripheral surface 23 of the nozzle holding mechanism 30 so that the vacuum suction nozzle 20 can be mounted. Here, the vacuum suction nozzle 20 is attached and detached by an air chuck including a holding pressure channel 34 and an air circuit forming means 35 (Patent Document 1).

  Further, as shown in FIG. 8, in another conventional example, the vacuum suction nozzle 101 that sucks the chip-shaped electronic component W is separated into a suction pin main body 103 having a suction / exhaust flow path 105 and a tip suction portion 102. The permanent magnet 104 is fixed to the annular end surface of the suction pin body 103, and the tip suction portion 102 is suction-fixed to the suction pin body 103 by the magnetic suction force of the permanent magnet 104. With this configuration, the small chip-shaped electronic component W is sucked by the tip suction portion 102 (Patent Document 2).

JP 2004-158658 A Japanese Utility Model Publication No. 61-117299

  However, in this type of conventional vacuum suction nozzle, a screw hole is formed in the nozzle holding mechanism, and the suction nozzle is screwed to the nozzle holding mechanism with a screw. Therefore, (i) it takes time to maintain and replace the vacuum suction nozzle. It takes time, (ii) it is easy to lose the tightening screw, and (iii) the tightening torque varies depending on the operator, so the tightening position is misaligned and the nozzle moves toward the nozzle holding mechanism. There are problems such as being eccentric and unable to set an accurate mounting position, or (iv) the nozzle being deformed by tightening during mounting.

  In addition, the attachment and detachment of the suction nozzle by the air chuck is done with a single touch, but since the nozzle holding mechanism becomes larger and complicated, the moment and inertia force during operation are not applied to the electronic component holding device that operates at high speed. There was a problem that it was unsuitable from the viewpoint.

  Furthermore, in the conventional example in which a permanent magnet is fixed to the annular end surface of the suction pin body and the tip suction portion of the electronic component is fixed by the magnetic attractive force of the permanent magnet, the upper end surface of the nozzle and the lower end surface of the permanent magnet are always in contact with each other. Therefore, since the permanent magnet is weak against the impact due to the impact at the time of contact, there is a possibility that the permanent magnet is easily broken and the adhesion between the attracting pin body and the permanent magnet is loosened and the permanent magnet falls.

  In order to solve the above-described problems, a vacuum suction nozzle of the present invention includes a nozzle holder having a large-diameter insertion hole and a small-diameter through-hole formed with a stepped portion, and an inner wall of the insertion hole formed in the nozzle holder. An annular magnet fitted and fixed to the stepped portion and a nozzle body fitted into the small-diameter through hole of the nozzle holder, and the nozzle body is attracted and held by the magnet's magnetizing force. It is characterized by.

  A second invention of the present application is characterized in that, in the first invention, the nozzle body is held by forming a predetermined gap between the bottom surface of the magnet and the tip of the nozzle body.

  A third invention of the present application is characterized in that, in the second invention, the predetermined gap is larger than 0 mm and smaller than 0.1 mm.

  According to a fourth invention of the present application, in the first invention described above, the nozzle body is prevented from rotating by contacting the D-cut portion on the side surface of the nozzle body parallel to the center line thereof and the D-cut portion on the bottom surface of the nozzle holder. A D-cut contact step portion is formed.

  According to a fifth invention of the present application, in the first invention, the insertion tolerance formed in the nozzle holder is a manufacturing tolerance of -0.004 to -0.012 mm with respect to a design outer diameter of the insertion shaft portion formed in the nozzle body. The manufacturing tolerance with respect to the design inner diameter dimension of the fitting hole into which the shaft portion is fitted is 0 to +0.012 mm.

  According to a sixth invention of the present application, in the first invention, the manufacturing tolerance with respect to the design dimension of the insertion shaft portion formed in the nozzle body is 0 to -0.05 mm, and the length of the fitting hole into which the insertion shaft portion is inserted. The manufacturing tolerance with respect to the design dimension is 0 to +0.05 mm.

  The seventh invention of the present application is the above-mentioned fourth invention, wherein the manufacturing tolerance with respect to the design dimension is 0 to -0.01 mm from the center of the nozzle body of the D cut portion formed in the nozzle body and the nozzle holder is formed in the nozzle holder. The manufacturing tolerance of the step for contacting the D-cut portion with respect to the design dimension from the center of the nozzle holder is 0 to +0.01 mm.

  The eighth invention of the present application is characterized in that, in the first invention, the outer peripheral surface of the nozzle body is subjected to a matte / rust-proof black film treatment.

  Finally, the ninth invention of the present application is characterized in that, in the first invention, the magnet is fixed to the insertion hole with an adhesive such as a two-component epoxy resin.

  Since the vacuum suction nozzle of the present invention does not require fastening with a screw or the like to attach to and detach from the nozzle holder, the suction nozzle can be replaced very easily and attached by an operator when the suction nozzle is inserted into the nozzle holder. The variation in position is eliminated, and furthermore, the structure of the suction nozzle is simple, and since it is small and light, it can be applied to an electronic component holding apparatus that operates at high speed.

The perspective view of the vacuum suction nozzle of the present invention is shown. 2A is a sectional view taken along the line II-II of the vacuum suction nozzle of the present invention shown in FIG. 1, and FIG. 2B is an enlarged sectional view taken along the arrow B in FIG. The nozzle main body which comprises the vacuum suction nozzle of this invention shown in FIG. 1 is shown, (a) is the front view, (b) is the top view seen from the suction hole side, (c) is (a) ) Is an enlarged plan view of the portion indicated by the arrow C. The nozzle holder which comprises the vacuum suction nozzle of this invention shown in FIG. 1 is shown, (a) is the front view, (b) shows the bottom view. FIG. 3 is a partial enlarged cross-sectional view taken along arrow A shown in FIG. 2. The side view of the general purpose electronic component holding apparatus which mounts | wears with the vacuum suction nozzle of this invention shown in FIG. 1 is shown. It is a longitudinal cross-sectional view of the conventional suction nozzle used for the electronic component holding apparatus shown in FIG. It is a longitudinal cross-sectional view of the suction nozzle using the conventional magnet.

  Hereinafter, embodiments of the vacuum suction nozzle of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the vacuum suction nozzle 1 of the present invention includes a nozzle body 2 made of a magnetic material, a nozzle holder 3 that holds the nozzle body 2, and a magnet 4. A magnet (permanent magnet) 4 inserted into a magnet insertion hole 3 a formed at the center of the nozzle holder 3 attracts and holds the upper end surface of the nozzle body 2 by its electromagnetic force.

  The general-purpose electronic component holding device shown in FIG. 6 is mounted by inserting and screwing the insertion hole 3a of the nozzle holder 3 into the suction nozzle mounting shaft 5 attached to the nozzle holding mechanism 30 ( (See FIG. 2).

  Small electronic parts, for example, electronic parts such as semiconductor chips, crystal resonators, and crystal oscillators, have one or more hole diameters formed in the suction portion 2c formed at the tip of the nozzle body 2, for example, 0. It is designed to be vacuum-sucked by the suction holes 2b of about 5 to 3.5 mm. For example, when adsorbing a rectangular electronic component such as a crystal piece, as shown in FIG. 3C, three adsorbers 3c, for example, are adsorbed so as to be parallel to the longitudinal direction of the crystal piece. The holes 2b are arranged so as to be adsorbed from the respective adsorption holes 2b by the branch channel. Here, intake and exhaust to and from the suction hole 2b are performed via the suction hole 2b and the ventilation hole 2a, the through hole 4 formed in the magnet 4, and the ventilation path (not shown) formed in the suction nozzle mounting shaft 5. It is like that.

  As shown in FIG. 3, the nozzle body 2 is made of, for example, SUS material (No. 440) having a large magnetism and attractive to the magnet 4, and has a tapered outer peripheral surface 2 g and a linear outer peripheral surface 2 h. Is applied with matte and anti-rust black coating (Raydent processing (registered trademark)) with a black coating of chromium oxide with a film thickness of 1 to 2 μm for the purpose of matting at the time of image processing such as external inspection of electronic parts. Has been. Then, in the axial direction of the nozzle body 2, as shown in FIG. 3, a D-cut (generally referred to as “D-cut” because the cut axial cross section looks like a D-shape) 2d is formed on the outer peripheral surfaces 2g and 2h. The shaft portion 2e is fitted into the fitting hole 3e of the nozzle holder 3 and comes into contact with a D-cut contact step 3d formed in the nozzle holder 3 described later. Thereby, the rotation of the suction nozzle 1 is prevented, and the suction hole 2d formed at the tip of the suction nozzle body 2 is positioned so as to be arranged in parallel with the outer shape of the electronic component W to be sucked.

  Further, as shown in FIG. 3A, an annular relief groove 2f is formed in the upper end flange 2j of the linear outer peripheral surface 2h of the nozzle body 2 that contacts the lower end surface 3f of the nozzle holder 3. It is avoided that a fillet (R portion) is formed at the corner 2k of the nozzle 2, and the contact between the lower end surface 3f of the nozzle holder 3 and the upper end flange (step portion) 2j of the nozzle 2 is made dense. Further, one or more suction holes 2b for suction formed at the tip (suction part) of the nozzle body 2 are formed at the tip of the nozzle body 2 as shown in FIGS. 3 (b) and 3 (c). Are formed in a direction parallel to the D-cut portion 2d.

  As shown in FIG. 4, the nozzle holder 3 is made of, for example, a SUS material (for example, No. 303 or No. 304), and the insertion hole 3e and the magnet insertion hole 3a of the nozzle body 2 are formed at the center thereof, and the side surface thereof. A screw hole 3c penetrating inside the magnet insertion hole 3a is formed in the upper part, and is fitted and screwed to the suction nozzle mounting shaft 5 of the electronic component holding device (see FIG. 2). Furthermore, a step 3d for D-cut contact is formed on the lower end surface of the nozzle holder 3, and comes into contact with the D-cut portion 2d of the nozzle body 2 so as to play a role of preventing rotation and positioning of the nozzle body 2. Yes.

  In addition, as shown in FIG. 2, the magnet 4 inserted into the magnet insertion hole 3a formed in the nozzle holder 3 and attracting the suction nozzle 1 is made of a permanent magnet, and has an outer dimension that can be inserted into the magnet insertion hole 3a and a predetermined size. In the center of the magnet 4, a through-hole 4a for intake / exhaust is formed so that air can escape because negative pressure is used for adsorption of the electronic component. The annular magnet 4 is fitted inside the magnet insertion hole 3a of the nozzle holder 3, and is fixed in the magnet insertion hole 3a with an adhesive such as a two-component epoxy resin, for example. Therefore, the magnet 4 does not fall from the nozzle holder 3. Further, since permanent magnets are used, electric wiring as in the case of using electromagnets is not necessary.

  In particular, in the vacuum suction nozzle of the present invention, as shown in an enlarged view in FIG. 5, the lower end surface (bottom surface) 4 c of the magnet 4 inserted and fixed in the magnet insertion hole 3 a of the nozzle holder 3 and the upper end surface 2 i of the nozzle body 2 A gap g that is larger than 0 mm and smaller than 0.1 mm is formed between the two. Therefore, the gap g prevents the upper end surface 2i of the nozzle body 2 from colliding with the magnet 4 when the magnet 4 is replaced with the nozzle body 2 or when the vacuum suction nozzle 1 of the present invention is used. Deviation from the mounting position is avoided.

  In general, in the vacuum suction nozzle of this kind of electronic component holding device, nozzle replacement is performed when the external dimensions of the electronic component to be sucked change, when the nozzle becomes dirty and needs to be cleaned, when the nozzle is worn, Etc. are performed frequently.

  However, in the vacuum suction nozzle of the present invention, as shown in FIG. 2, since the suction nozzle body 2 is securely held by the magnetic force of the magnet 4, the component processing accuracy between the suction nozzle body 2 and the nozzle holder 3 is increased. Ensuring both mounting accuracy is large, and it is possible to replace the suction nozzle body 2 with the nozzle holder 3 with a single touch, and to realize advanced mounting accuracy and position reproducibility of the suction nozzle body 2. Yes.

  That is, as shown in FIGS. 3A and 3B, the manufacturing tolerance with respect to the design dimension of the outer diameter dimension of the insertion shaft portion 2e of the nozzle body 2 is, for example, -0.004 to -0.012 mm, and the insertion shaft The manufacturing tolerance with respect to the design dimension of the dimension d1 from the end surface 2i to the stepped part 2j of the part 2e is 0 to −0.05 mm, and the manufacturing tolerance of the dimension d2 from the center of the nozzle body 2 to the D-cut part 2d is 0 to −. 0.01 mm.

  On the other hand, the manufacturing tolerance with respect to the design dimension of the length of the fitting hole 3e into which the insertion shaft part 2e of the nozzle body 2 formed in the nozzle holder 3 into which the nozzle body 2 is inserted as shown in FIG. Manufacturing with respect to the design dimension from the center of the nozzle holder 3 to the D-cut contact step 3d with a manufacturing tolerance of 0 to +0.052 mm, the design dimension d3 from the surface 3b to the end surface 3f with which the bottom surface of the magnet 4 abuts. The tolerance is 0 to +0.01 mm.

  Due to such minute manufacturing tolerances of the fitting portion between the suction nozzle body 2 and the nozzle holder 3 that are fitted to each other, the suction nozzle body 2 can be replaced with one touch, and further high mounting accuracy and position reproducibility. Is surely secured.

  The vacuum suction nozzle of the present invention is not limited to holding and transporting devices and mounting devices for small electronic components such as semiconductor chips, crystal resonators, crystal oscillators, etc. Widely applicable.

DESCRIPTION OF SYMBOLS 1 Adsorption nozzle 2 Nozzle main body 2a Adsorption hole 2b Through-hole 2c Adsorption part 2d D cut part 2e Insertion shaft part 2f Escape groove 2g Tapered outer peripheral surface 2h Linear outer peripheral surface 2i End surface 2j Step part (upper edge part)
2k Square portion 3 Nozzle holder 3a Magnet insertion hole 3b Magnet mounting surface 3c Screw hole 3d D cut portion contact step 3e Fitting hole 3f End surface 3g Adhesive 4 Magnet 4a Through hole 4b Nozzle holder contact surface 5 Adsorption nozzle mounting shaft 10 Electronic component holding device 20 Suction nozzle 21 Tubular member 22 Through hole 23 Tapered outer peripheral surface 30 Nozzle holding mechanism 31 Slide shaft 32 Holding pressure channel 33 Taper inner peripheral surface 35 Intake / exhaust channel 40 Nozzle lifting mechanism 50 Angle adjustment mechanism 60 Intake supply mechanism W Electronic component g Gap

Claims (9)

A nozzle holder having a large-diameter insertion hole having a stepped portion and a small-diameter through hole;
An annular magnet fitted and fixed to the inner wall of the insertion hole and the stepped portion formed in the nozzle holder;
A nozzle body fitted into the small diameter through hole of the nozzle holder,
A vacuum suction nozzle for an electric component holding device, wherein the nozzle body is sucked and held by the suction force of the magnet.   The vacuum suction nozzle according to claim 1, wherein a predetermined gap is formed between the bottom surface of the magnet and the tip of the nozzle body, and the nozzle body is held by the nozzle holder.   The vacuum suction nozzle according to claim 2, wherein the predetermined gap is larger than 0 mm and smaller than 0.1 mm.   On the side surface of the nozzle body, there are formed a D-cut portion parallel to the center line thereof and a D-cut contact step portion that contacts the D-cut portion and prevents the nozzle body from rotating on the bottom surface of the nozzle holder. The vacuum suction nozzle according to claim 1.   The manufacturing tolerance with respect to the design outer diameter of the insertion shaft formed at the tip of the nozzle body is -0.004 to -0.012 mm, and the design inner diameter of the fitting hole into which the insertion shaft formed in the nozzle holder is inserted. The vacuum suction nozzle according to claim 1, wherein a manufacturing tolerance with respect to a dimension is 0 to +0.012 mm.   The manufacturing tolerance with respect to the design dimension of the length of the insertion shaft portion formed in the nozzle body is 0 to -0.05 mm, and the manufacturing tolerance with respect to the design dimension of the length of the fitting hole into which the insertion shaft portion is inserted is 0 to +0. The vacuum suction nozzle according to claim 1, which is 0.05 mm.   From the center of the nozzle body of the D cut portion formed in the nozzle body, the manufacturing tolerance with respect to the design dimension is 0 to -0.01 mm, and from the center of the nozzle holder of the step for contacting the D cut portion formed in the nozzle holder. The vacuum suction nozzle according to claim 4, wherein a manufacturing tolerance with respect to a design dimension of the vacuum suction nozzle is 0 to +0.01 mm.   The vacuum suction nozzle according to claim 1, wherein the outer peripheral surface of the nozzle body is subjected to a matte / rust-proof black film treatment.   The vacuum suction nozzle according to claim 1, wherein the magnet is fixed to the insertion hole with an adhesive such as a two-component epoxy resin.

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