JP5450235B2 - Parts supply method - Google Patents

Description

  The present invention relates to a component supply method for moving a component along a supply passage and supplying the component to an outlet.

  Patent Documents 1 and 2 include a storage chamber having a rear wall surface and an arcuate guide surface on the outer periphery, an intake port (hereinafter referred to as an intake port) provided at the upper end of the guide surface, and an intake port. A passage provided toward the downstream, a component separation part provided at the tip of the passage, a rotating plate provided behind the wall surface of the storage chamber, and a plurality of magnets provided in the rotating plate. A bulk feeder is disclosed.

  Further, Patent Documents 1 and 2 disclose that the components in the storage chamber are rotated by a magnetic force of a magnet by rotating the rotating plate in a predetermined direction with the components stored in the storage chamber in a loose state (a state in which the directions are not aligned). Simultaneously sucking both the wall surface and the arcuate guide surface and aligning them along both surfaces, allowing only the aligned parts to flow into the intake port, and moving the components flowing into the intake port to the component separation section through the passage Thus, a component supply method is disclosed in which the component is supplied to a portion corresponding to an outlet formed in the component separation portion.

  By the way, this type of bulk feeder is frequently used as a component supply means of a mounter (component mounting apparatus), and in addition, there is a high-speed mounter with a short mounting time per component. That is, the bulk feeder is required to be capable of supplying parts to the outlet at a short time interval (specifically, 50 msec or less).

  However, since the bulk feeder disclosed in Patent Documents 1 and 2 adopts a method in which the parts flowing into the intake port are moved by their own weight downward through the passage and supplied to the corresponding portion of the outlet, the length of the passage Is very long compared to the length of the part, and it is highly possible that the part will be tilted in the process of moving in the passage, resulting in part clogging, and the weight per part is light. Therefore, it is difficult to move the part smoothly by its own weight. In other words, it is difficult for the bulk feeder to exhibit the ability to supply parts suitable for a high-speed mounter, that is, the ability to supply parts to the outlet at a short time interval (specifically, 50 msec or less).

Japanese Patent No. 3482324 Japanese Patent No. 3796971

  An object of the present invention is to provide a component supply method capable of reliably supplying components to an outlet at a short time interval.

  In order to achieve the above object, the present invention provides a component supply method for moving a component along a supply passage and supplying the component to an outlet, wherein the supply passage has an arcuate shape from the bottom to the top, and a leading portion in the supply passage. There are a magnetizable stopper that comes into contact with the parts, a top opening opening for taking out the leading part that has stopped in contact with the stopper from the supply passage, and a plurality of permanent magnets that can move while facing the supply passage. A permanent magnet is present at a position past one side of the outlet and a permanent magnet different from the one permanent magnet enters one side of the supply passage. In this state, the rotor is stopped, and in the rotor stop position, the stopper is magnetized by the magnetic force of one permanent magnet, and the leading part in the supply passage is moved by the magnetic force generated in the magnetized stopper. The stock And other parts in the supply passage are prevented from moving downward along the supply passage due to the magnetic force of another permanent magnet, and the leading part is taken out through the take-out port at the rotor stop position. Each time, the rotor is rotated by a predetermined angle in the direction toward the outlet, and the same state as the rotor stop position is created.

  According to this component supply method, at the rotor stop position, the leading component in the supply passage is attracted to the stopper by the magnetic force generated in the magnetized stopper, so that the leading component can be held. The operation of taking out the leading part through the take-out port can be performed without any trouble by the suction nozzle or the like, and even if the time interval at which the leading part is taken out becomes short, for example, the part taking time interval is 50 msec or less The work can be performed satisfactorily.

  In addition, at the rotor stop position, supply to the take-out port is achieved by preventing other parts in the supply passage from moving downward along the supply passage due to the attractive force of the magnetic force of another permanent magnet. Parts to be stored can be stored in the supply passage. In other words, since the parts stored in the supply passage can be sequentially supplied to the outlet, the parts can be supplied to the outlet quickly, and even if the time interval at which the leading part is taken out becomes shorter, for example, the parts are taken out. Even if the time interval is 50 msec or less, it is possible to supply components that follow the time interval.

  ADVANTAGE OF THE INVENTION According to this invention, the components supply method which can supply components reliably to a taking-out outlet in a short time interval can be provided.

  The above object and other objects, structural features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.

1A to 1C are perspective views of parts to be supplied by the bulk feeder shown in FIG. FIG. 2A is a left side view of a bulk feeder that realizes the present invention (part supply method), and FIG. 2B is a top view thereof. 3A is a left side view of the case shown in FIG. 2, FIG. 3B is a right side view thereof, and FIG. 3C is a top view thereof. 4A is a right side view of the left plate constituting the case shown in FIG. 3, and FIG. 4B is a left side view of the right plate. 5 (A) to 5 (D) are partial enlarged cross-sectional views of the arc groove shown in FIG. 4 (B). 6A is an enlarged cross-sectional view taken along line S1-S1 in FIG. 3C, and FIG. 6B is an enlarged view of FIG. 3C. 7A is a left side view of the frame shown in FIG. 2, and FIG. 7B is a top view thereof. 8A is a left side view of the rotor shown in FIG. 2, and FIG. 8B is a cross-sectional view taken along line S2-S2 of FIG. 9A. 9A is a left side view of the motor (including the drive gear) shown in FIG. 2, and FIG. 9B is a right side view thereof. 10A is a left side view of the relay gear shown in FIG. 2, and FIG. 10B is a cross-sectional view taken along line S3-S3 in FIG. 10A. FIG. 11 is a left side view of a feeder body configured by attaching the rotor, the motor with drive gear, and the relay gear shown in FIGS. 8 to 10 to the frame shown in FIG. 12 is an explanatory view of a method of attaching the case shown in FIG. 3 to the feeder main body shown in FIG. FIG. 13 is a diagram showing a positional relationship between the case attached to the feeder main body and the rotor. 14A to 14C are views showing the positional relationship between the case attached to the feeder body and the rotor. FIG. 15 is an explanatory diagram of the component supply operation of the bulk feeder shown in FIG. FIG. 16 is an explanatory diagram of the component supply operation of the bulk feeder shown in FIG. FIG. 17 is an explanatory diagram of the component supply operation of the bulk feeder shown in FIG. FIG. 18 is an explanatory diagram of the component supply operation of the bulk feeder shown in FIG. FIG. 19 is an explanatory diagram of the component supply operation of the bulk feeder shown in FIG. FIG. 20 is an explanatory diagram of the component supply operation of the bulk feeder shown in FIG. FIG. 21 is an explanatory diagram of the behavior of components in the supply passage related to the component supply operation. FIG. 22 is an explanatory view of the behavior of the components in the supply passage related to the component supply operation. FIG. 23 is an explanatory diagram of the behavior of the components in the supply passage according to the component supply operation. FIG. 24 is an explanatory diagram of the behavior of the components in the supply passage according to the component supply operation. FIG. 25 is an explanatory diagram of the behavior of components in the supply passage according to the component supply operation.

[Parts to be supplied by bulk feeder]
First, referring to FIG. 1, “parts to be supplied to the bulk feeder” will be described.

  The part PA1 shown in FIG. 1A has a rectangular parallelepiped shape having a dimensional relationship of length L1> width W1 = height H1, and the part PA2 shown in FIG. 1B has a length L2> width W2>. A rectangular parallelepiped shape having a dimensional relationship of height H2 is formed, and a part PA3 shown in FIG. 1C has a cylindrical shape having a dimensional relationship of length L3> diameter R3.

  Typical examples of these components PA1, PA2, and PA3 are electronic components such as small chip capacitors and chip registers having lengths L1, L2, and L3 of 1.6 mm, 1.0 mm, 0.6 mm, 0.4 mm, and the like. . These electronic components generally have an external electrode containing a material belonging to a ferromagnetic material and, depending on the type, an internal conductor containing a material belonging to a ferromagnetic material. The permanent magnet 35) can be attracted by the magnetic force.

  Of course, it is needless to say that parts other than electronic parts can be supplied as long as the parts have the same shape that can be attracted by the magnetic force of the permanent magnet 35 described later. 1A, FIG. 1B, and FIG. 1C show rectangular parallelepiped or columnar parts PA1, PA2, and PA3, which can be attracted by the magnetic force of the permanent magnet 35 described later. If so, a part having a shape similar to the shape shown in each drawing, a part having a spherical shape, or the like can be supplied.

[Bulk feeder structure]
Next, the “bulk feeder structure” will be described with reference to FIGS. In this description, for convenience of explanation, the left, right, front, back, top, and bottom of FIG. 2A are referred to as front, back, left, right, top, and bottom, respectively, and these are the same in other drawings. Corresponding directions are referred to similarly. 2 to 4, 6, 7, 11, and 14 indicate positions corresponding to the rotation center of the rotor 30 described later.

  The bulk feeder shown in FIG. 2 is composed of a feeder body (no reference) and a case 10 that is detachably attached to the feeder body. The feeder main body includes a frame 20, a rotor 30, a motor 40, a drive gear 50, and a relay gear 60.

(Case structure)
As shown in FIGS. 3 (A), 3 (B), and 3 (C), the case 10 has a substantially rectangular parallelepiped shape in which the left-right dimension is smaller than the vertical dimension and the front-rear dimension. The case 10 is configured by combining the left plate 11 shown in FIG. 4 (A) and the right plate 12 shown in FIG. 4 (B).

  As shown in FIG. 4A, the left plate 11 has a substantially rectangular outline in right view and is made of metal or plastic. The left plate 11 has a total of four screw holes 11a at the four corners of the right surface and a storage chamber recess 11b at the center of the right surface.

  The concave portion 11b for the storage chamber has a curvature center smaller than that of the first arc surface 11b1 and the first arc surface 11b1 having the center of curvature at the + mark in the figure and having a predetermined radius of curvature, and the first arc. A second arc surface 11b2 having the same center of curvature as the surface 11b1, a first plane 11b3 connecting the lower end of the first arc surface 11b1 and the lower end of the second arc surface 11b2, and an upper end and a second arc of the first arc surface 11b1. It has the 2nd plane 11b4 which connects the upper end of the surface 11b2, and the left side surface 11b5 which hits the bottom of the recessed part 11b for storage chambers. The radius of curvature of the first arc surface 11b1 is larger than the radius of curvature of the outer arc surface 12b1 of the arc groove 12b described later, and the radius of curvature of the second arc surface 11b2 is larger than the radius of curvature of the inner arc surface 12b2 of the arc groove 12b described later. small.

  As shown in FIG. 4B, the right plate 12 has a substantially rectangular outline in right view, and a metal such as aluminum or plastic that can transmit the magnetic force of a permanent magnet 35 (permanent magnet 35 of the rotor 30) described later. Formed from. The left side view contour of the right plate 12 substantially matches the left side view contour of the left plate 11, and the thickness of the right plate 12 is smaller than the thickness of the left plate 11. The right plate 12 has a total of four screw insertion holes 12a corresponding to the screw holes 11a of the left plate 11 at four corners, an arc groove 12b on the left rear side, and a stopper mounting groove 12c on the left upper side. And has an outlet recess 12d at the center of the upper surface and a total of two positioning holes 12e into which the positioning pins 24 described later can be inserted at the front upper part and the rear lower part.

  The arc groove 12b has a center of curvature at the + mark in the drawing, has an outer arc surface 12b1 having a predetermined radius of curvature, a smaller radius of curvature than the outer arc surface 12b1, and the outer arc surface 12b1 and the center of curvature. And the difference between the radius of curvature of the outer arc surface 12b1 and the radius of curvature of the inner arc surface 12b2 defines a width Wg described later. The circular arc groove 12b is formed in an angle range of about 180 degrees from the bottom to the top, specifically, from approximately directly below the mark + to approximately directly above the figure.

  The stopper mounting groove 12c is a linear groove having the same cross-sectional shape as the circular arc groove 12b, and three surfaces defining the width and depth thereof are three surfaces defining the postscript width Wg and postscript depth Dg of the arc groove 12b. Are formed from the uppermost point of the arc groove 12b toward the front side.

  The outlet recess 12d is formed so as to cut out the center of the upper surface of the right plate 12, specifically, the uppermost point of the arc groove 12b and the upper side of the front and rear portions thereof in the left-right direction. It has a predetermined depth reaching the mounting groove 12c. That is, the uppermost point and the rear portion of the arc groove 12b, the rear end of the stopper mounting groove 12c, and the front portion thereof are opened through the outlet recess 12d.

  As shown in FIG. 4B, a rod-like stopper 13 having a columnar shape or a quadrangular prism shape is attached to the stopper attaching groove 12c by being fitted with an adhesive as necessary. . The stopper 13 can be magnetized by the magnetic force of the permanent magnet 35, specifically, a rod made of a material such as iron or nickel belonging to a ferromagnetic material, or a mother made of a material belonging to a ferromagnetic material. A bar made of a material made of another material belonging to a ferromagnetic material on the entire surface of the material by plating or a layer made of a material belonging to a ferromagnetic material on the whole surface of a base material made of a material not belonging to a ferromagnetic material A bar or the like formed by plating or the like is used.

  The rear end of the stopper 13 attached to the stopper mounting groove 12c protrudes toward the outlet recess 12d, and the rear end is exposed through the outlet recess 12d. That is, the rear end portion of the stopper 13 enters the open portion formed by the recess 12d for the take-out port, and the region where the stopper 13 does not exist in the open portion becomes the post-takeout port 17.

  The cross-sectional shape of the arc groove 12b when the part PA1 shown in FIG. 1A is the supply target is slightly larger than the width W1 or the height H1 of the part PA1, as shown in FIG. 5A. And a rectangular shape having a width Wg and a depth Dg smaller than the end face diagonal dimension D1 and the length L1. That is, the circular arc groove 12b shown in FIG. 5A can accommodate the component PA1 so as to be movable in a length direction in which the surfaces of the width or height are substantially aligned, as indicated by the broken line in FIG.

  FIG. 5 (B) shows another cross-sectional shape of the arc groove 12b when the part PA1 shown in FIG. 1 (A) is supplied, and the cross-sectional shape is larger than the end face diagonal dimension D1 of the part PA1. It is a rectangle that is slightly larger and has a width Wg and a depth Dg smaller than the length L1. That is, the arc groove 12b shown in FIG. 5B can accommodate the component PA1 so as to be movable in the length direction regardless of the direction of the width and height surfaces, as indicated by the broken line in FIG.

  Further, the cross-sectional shape of the circular groove 12b when the part PA2 shown in FIG. 1B is a supply target is slightly larger than the height H2 of the part PA2, as shown in FIG. In addition, the rectangular shape has a width Wg smaller than the width W2 and a depth Dg slightly larger than the width W2. That is, the arc groove 12b shown in FIG. 5C can accommodate the component PA2 so as to be movable in the length direction in which the surfaces of the width and the height are substantially aligned, as shown by the broken line in FIG.

  Furthermore, the cross-sectional shape of the circular groove 12b when the part PA3 shown in FIG. 1C is to be supplied is slightly larger than the diameter R3 of the part PA3 as shown in FIG. , A rectangle having a width Wg and a depth Dg smaller than the length L3. That is, the circular arc groove 12b shown in FIG. 5D can accommodate the component PA3 so as to be movable in the length direction, as indicated by a broken line in FIG.

  Although not shown in the drawings, when a part having a shape similar to the shape shown in FIGS. 1A to 1C or a spherical part is to be supplied, the part is moved in a predetermined direction. An arc groove 12b having a cross-sectional shape that can be accommodated is employed.

  When the case 10 shown in FIG. 3 is assembled using the left plate 11 shown in FIG. 4A and the right plate 12 shown in FIG. 4B, the left surface of the right plate 12 is overlapped with the right surface of the left plate 11. The left plate 11 and the right plate 12 may be joined by inserting a set screw FS into each screw insertion hole 12 a of the right plate 12 and screwing each set screw FS into each screw hole 11 a of the left plate 11. Each set screw FS is made of a material including a ferromagnetic material so that the head thereof can be attracted to the permanent magnet 25 (permanent magnet 25 of the frame 20) described later.

  By this assembly, the right opening of the storage chamber recess 11 b of the left plate 11 is closed by the left surface of the right plate 12. Further, the upper part of the left opening of the circular groove 12b of the right plate 12, the left opening of the stopper mounting groove 12c, and the left opening of the outlet recess 12d are the right surface of the left plate 11 where the recess 11b for the storage chamber does not exist. Occluded by part.

  That is, as shown in FIGS. 6 (A) and 6 (B), in the case 10, the first arc surface 11b1, the second arc surface 11b2, and the first plane of the storage chamber recess 11b of the left plate 11 are provided. A storage chamber 14 is defined that is surrounded by 11b3, the second flat surface 11b4, the left inner surface 11b5, and a part of the left surface of the right plate 12, and has a substantially circular left-side view outline. In the storage chamber 14, the left inner surface 11 b 5 of the left plate 11 serves as the left side wall of the storage chamber 14, and a part of the right plate 12 serves as the right side wall of the storage chamber 14.

  Further, as shown in FIGS. 6 (A) and 6 (B), the inner surface of the right side wall of the storage chamber 14 is a portion where the left opening of the circular groove 12b of the right plate 12 is not closed (about 150 degrees). Arc-shaped guide groove 15 extending from bottom to top is formed. As can be seen from the figure, the starting point of the guide groove 15 is located almost directly below the + mark in the figure.

  Further, as shown in FIGS. 6 (A) and 6 (B), the same as the guide groove 15 by the part (angle range part of about 30 degrees) where the left side opening of the arc groove 12b of the right plate 12 is closed. An arcuate supply passage 16 having a cross-sectional shape and extending from the bottom to the top with the upper end of the guide groove 15 as a base point is formed, and an intake port 16a serving as an inlet is formed at the rear end of the supply passage 16 It is formed. As can be seen from the figure, the end point (tip) of the supply passage 16 is located substantially immediately above the + mark in the figure. The stopper 13 is present in the front-rear direction from the front end to the front side of the supply passage 16.

  Further, as shown in FIGS. 6 (A) and 6 (B), on the upper surface of the case 10, the parts that have moved in the supply passage 16 and stopped after coming into contact with the rear end of the stopper 13 are provided on the supply passage. A take-out port 17 having an upper surface opening for taking out from 16 is formed. As can be seen from the figure, the outlet 17 is located substantially immediately above the + mark in the figure.

  Further, as shown in FIGS. 6A and 6B, the radius of curvature of the first arc surface 11b1 constituting the storage chamber 14 is larger than the radius of curvature of the outer arc surface 12b1 of the guide groove 15, An arcuate flat surface FP1 having a width according to the difference between the radii of curvature of both is formed outside the guide groove 15. That is, since the flat surface FP2 that is flush with the flat surface FP1 exists inside the guide groove 15, the guide groove 15 is positioned so as to be sandwiched between the two flat surfaces FP1 and FP2. Become. Incidentally, when the parts PA1, PA2, and PA3 shown in FIG. 1 are to be supplied, the width of the flat surface FP1 is generally set to a value that is twice or more the length of the part.

(Feeder body structure)
As shown in FIGS. 11 and 12, the feeder main body (without reference numeral) includes a frame 20, a rotor 30, a motor 40, a drive gear 50, and a relay gear 60.

  As shown in FIGS. 7A and 7B, the frame 20 includes a bottom wall 21 whose bottom view outline is rectangular, and a right wall 22 whose left side outline is rectangular and perpendicular to the bottom wall 21. And a rotor arrangement portion 23 provided in front of the left surface of the right wall 22, and the bottom wall 21, the right wall 22 and the rotor arrangement portion 23 are preferably made of aluminum through which the magnetic force of the permanent magnet can be transmitted. Etc. are formed from metal or plastic.

  The right wall 22 is formed with screw holes 22 a used for mounting the rotor 30, four screw holes 22 b used for mounting the motor 40, and screw holes 22 c used for mounting the relay gear 60. .

  A circular recess 23 a having an inner diameter slightly larger than the outer diameter of the rotor 30 and a depth slightly larger than the left and right dimensions of the rotor 30 is formed in the rotor arrangement portion 23. In the drawing, the depth of the circular recess 23a matches the thickness of the rotor arrangement portion 23, and a part of the left surface of the right wall 22 forms the bottom of the circular recess 23a. In order to project the upper part of the rotor 30 upward from the upper surface of the frame 20, the circular recess 23 a is shaped such that its upper end is cut off from the upper surface of the rotor arrangement portion 25. In addition, a rectangular recess 23b having the same depth as the circular recess 23a is formed at the rear portion of the rotor placement portion 25 so as to be continuous with the circular recess 23a.

  Further, a total of two positioning pins 24 that can be respectively inserted into the positioning holes 12e of the case 10 are provided integrally or separately on the front upper portion and the rear lower portion of the left surface of the rotor arrangement portion 23. When each pin 24 is provided as a separate body, one end of the columnar pin is arranged by fitting it into a hole with a predetermined depth formed on the left surface of the rotor arrangement portion 25 using an adhesive as necessary. It ’s fine. The cross-sectional shape of each positioning pin 24 is slightly smaller than the cross-sectional shape of the positioning hole 12e, and the protruding dimension is slightly smaller than the depth of the positioning hole 12e (the thickness of the right plate 12). Each positioning pin 24 preferably has a hemispherical tip or a conical shape so that it can be easily inserted into each positioning hole 12e.

  Further, a total of three permanent magnets 25 capable of attracting the head of the set screw FS of the case 10 are embedded in the front upper portion, front lower portion, and rear lower portion of the left surface of the rotor arrangement portion. Each permanent magnet 25 has a columnar shape or a quadrangular prism shape having magnetic poles at both end faces, and the magnetic pole is exposed in a substantially flush state with the left face of the rotor arrangement portion 25. Each permanent magnet 25 is attached by being fitted into a hole having a predetermined depth formed in the left surface of the rotor arrangement portion 25 using an adhesive as necessary.

  In this frame 20, on the left side of the rotor arrangement portion 23, a case mounting portion 26 that can be attached by insertion from the left side of the case 10 and can be removed by extraction to the left side, that is, the left and right direction of the case 10 A case attaching portion 26 that can be attached and detached is formed.

  As shown in FIGS. 8A and 8B, the rotor 30 includes a disc portion 31 having a predetermined thickness, a boss portion 32 provided at the center of the right surface of the disc portion 31, and a disc portion. Aluminum having a circular hole 33 penetrating the left and right sides 31 and the boss portion 32 and a flat tooth 34 (not shown) formed on the outer peripheral surface of the disc portion 31 and capable of transmitting the magnetic force of a permanent magnet. Made of metal or plastic.

  The left and right dimensions of the rotor 30, that is, the distance between the left surface of the disc portion 31 a and the right surface of the boss portion 32 is slightly smaller than the depth of the circular recess 23 a of the frame 20. A circular recess 33 a having a larger diameter than the circular hole 33 is formed at the left end of the circular hole 33. The circular recess 33a is for rotatably accommodating a circular head of a support shaft SS described later.

  In addition, on the left surface of the disc portion 31, a total of eight permanent magnets 35 have respective one magnetic poles concentric with the center of the disc portion 31 (corresponding to the rotation center of the rotor 30) (in a circular orbit described later). Are arranged at intervals of 45 degrees. Each permanent magnet 35 has a columnar shape or a quadrangular prism shape having magnetic poles at both end faces, while the magnetic pole is exposed to be substantially flush with the left face of the disc portion 31. Each permanent magnet 35 is attached by being fitted into a hole having a predetermined depth formed on the left surface of the disc portion 31 using an adhesive as necessary. Each permanent magnet 35 has a surface magnetic force sufficient to attract components in the storage chamber 14 toward the guide groove 15. Further, each permanent magnet 35 has one magnetic pole center (corresponding to a magnetic force center where magnetic field lines are most densely located) located on the virtual circle VC. The radius of curvature of the virtual circle VC (corresponding to a circular orbit described later) is “below the radius of curvature of the outer arcuate surface 12b1 constituting the guide groove 15 and the supply passage 16 of the case 10 and greater than the radius of curvature of the inner arcuate surface 12b2. Is set so as to satisfy the condition of "." Incidentally, all the polarities of the one magnetic pole of each permanent magnet 35 may be N poles or S poles, or N poles and S poles may be arranged alternately along the virtual circle VC.

  As shown in FIGS. 11 and 12, the rotor 30 is inserted into the circular recess 25a of the frame 20 so that the left side faces the left side, and the screw portion of the support shaft SS inserted into the circular hole 33 is inserted into the frame 20. It is rotatably arranged on the frame 20 by being screwed into the screw hole 22a. The support shaft SS has a circular head portion, a cylindrical portion, and a screw portion, and the left and right dimensions of the cylindrical portion are slightly larger than the left and right dimensions of the circular hole 33 excluding the circular concave portion 33a. In the state in which the right end of the cylindrical portion of the support shaft SS is in contact with the left surface of the circular recess 25a of the frame 20 and the circular head of the support shaft SS is accommodated in the circular recess 33a), the rotor 30 has a left surface on the frame 20 It can be rotated in a state parallel to or close to the left surface of the rotor arrangement portion 25. Further, since the left-right dimension of the rotor 30 is slightly smaller than the depth of the circular recess 23 a of the frame 20, the left surface of the rotor 30 is slightly retracted to the right side of the left surface of the rotor arrangement portion 25 of the frame 20. In this arrangement state, the rotor 30 can rotate around the support shaft SS, and each permanent magnet 35 can move along a circular orbit corresponding to the virtual circle VC along with this rotation.

  As shown in FIGS. 9A and 9B, the motor 40 includes a cylindrical motor body 41, a flange 42 provided at the right end of the motor body 41, and the motor body 41 to the flange 42. And a total of four screw insertion holes 44 formed at the four corners of the flange 42.

  As shown in FIGS. 9A and 9B, the drive gear 50 has spur teeth (not shown) on the outer peripheral surface, and its central portion is fixed to the motor shaft 43 of the motor 40. . The drive gear 50 is made of metal or plastic, and the spur teeth (not shown) on the outer peripheral surface have a shape that can mesh with the spur teeth 64 on the outer peripheral surface of the relay gear 60.

  As shown in FIGS. 11 and 12, the motor 40 with the drive gear 50 includes the frame 20 by screwing the set screw FS inserted into each screw insertion hole 44 and the cylindrical spacer 45 into the screw hole 22 b of the frame 20. It is fixedly arranged. Since the left and right dimensions of the spacer 45 that define the distance between the right surface of the motor 40 and the left surface of the right wall 22 of the frame 20 are larger than the projecting dimensions of the motor shaft 43 and the drive gear 50 from the right surface of the motor 40, the screwing is completed. Then, the right surfaces of the motor shaft 43 and the drive gear 50 do not contact the left surface of the right wall 22 of the frame 20.

  As shown in FIGS. 10A and 10B, the relay gear 60 includes a disc portion 61 having a predetermined thickness, a boss portion 62 provided at the center of the right surface of the disc portion 61, and a disc. It has a circular hole 63 penetrating left and right through the part 61 and the boss part 62, and flat teeth 64 (not shown) formed on the outer peripheral surface of the disk part 61, and is made of metal or plastic. The horizontal dimension of the relay gear 60, that is, the distance between the left surface of the disc portion 61 a and the right surface of the boss portion 62 is slightly smaller than the depth of the rectangular recess 23 b of the frame 20. The flat teeth 64 have a shape that can mesh with the flat teeth 34 on the outer peripheral surface of the rotor 30. A circular recess 63 a having a larger diameter than the circular hole 63 is formed at the left end of the circular hole 63. The circular recess 63a is for rotatably accommodating a circular head of a support shaft SS described later.

  As shown in FIGS. 11 and 12, the relay gear 60 is inserted into the rectangular recess 25b of the frame 20 so that the left side faces the left side, and the support shaft SS inserted into the circular hole 63 is inserted. The screw portion is screwed into the screw hole 22 c of the frame 20, so that the screw portion is rotatably arranged on the frame 20. The support shaft SS has a circular head portion, a cylindrical portion, and a screw portion, and the left and right dimensions of the cylindrical portion are slightly larger than the left and right dimensions of the circular hole 63 excluding the circular recess 63a. In the state in which the right end of the cylindrical portion of the support shaft SS is in contact with the left surface of the right wall 22 of the frame 20 and the circular head of the support shaft SS is accommodated in the circular recess 63a), the relay gear 60 has a left surface on the frame. It can rotate in a state parallel to or close to the left face of the right wall 20. Further, since the lateral dimension of the relay gear 60 is slightly smaller than the depth of the rectangular recess 25 b of the frame 20, the left surface of the relay gear 60 is slightly retracted to the right side of the left surface of the rotor arrangement portion 25 of the frame 20.

  11 and 12, when the rotor 30, the motor 40 with the drive gear 50 and the relay gear 60 shown in FIGS. 8 to 10 are attached to the frame 20 shown in FIG. The spur teeth on the surface mesh with the spur teeth 64 on the outer peripheral surface of the relay gear 60, and the spur teeth 64 of the relay gear 60 mesh with the spur teeth 34 on the outer peripheral surface of the rotor 30. That is, by rotating the drive gear 50 in a predetermined direction by the operation of the motor 40, the rotor 30 can be rotated in the same direction via the relay gear 60, and the rotation of the rotor 30 is stopped by stopping the operation of the motor 40. Can be stopped.

(How to attach the case to the feeder)
When attaching the case 10 shown in FIG. 3 to the feeder body shown in FIG. 11, as shown in FIG. 12, the case 10 is gripped by a fingertip or the like, and the positioning holes 12e on the right side of the case 10 After positioning so as to face each positioning pin 24, each positioning pin 24 is inserted into each positioning hole 12e, and the right surface of the case 10 is brought into contact with the left surface of the rotor placement portion 25. In this process, the heads of three set screws FS out of the total four set screws FS of the case 10 are attracted to a total of three permanent magnets 25 of the frame 20, respectively. It is pressed against the left surface of the rotor arrangement part 25. Thereby, the case 10 is attached to the case attachment portion 26 in a state where the case 10 is held at a predetermined three-dimensional position. Incidentally, when the case 10 attached to the case attaching portion 26 of the feeder body is removed from the case attaching portion 26, the case 10 is gripped by a fingertip or the like, and the case 10 is resisted against the attractive force based on the magnetic force of each permanent magnet 25. Just pull 10 to the left.

(Positional relationship between the case attached to the feeder body and the rotor)
In the state where the case 10 is attached to the feeder body, as shown in FIG. 14, the left surface of the rotor 30 is parallel to the right surface of the case 10 via a gap as small as possible (no reference numeral) that allows the rotor 30 to rotate. Or face each other in a state close to this.

  As shown in FIG. 13, the rotation center of the rotor 30 is the center of curvature of the outer arcuate surface 12b1 and the inner arcuate surface 12b2 constituting the guide groove 15 and the supply passage 16 of the case 10, and one of the permanent magnets 35. It substantially coincides with the center of the virtual circle VC (see FIG. 8A) where the center of the magnetic pole is located.

  Furthermore, as shown in FIG. 13, the condition that “the radius of curvature of the virtual circle VC (= circular orbit) is equal to or smaller than the radius of curvature of the outer circular arc surface 12 b 1 and equal to or larger than the radius of curvature of the inner circular arc surface 12 b 2” is satisfied. Therefore, one magnetic pole of each permanent magnet 35 that moves under the circular orbit corresponding to the virtual circle VC faces the guide groove 15 and the supply passage 16, and the center of each permanent magnet 35 is in the guide groove 15 and the supply passage 16. Look inward.

  Further, since the right plate 12 of the case 10 can transmit magnetic force, the magnetic force of the permanent magnet 35 facing the guide groove 15 extends into the guide groove 15 and the storage chamber 14 through the right plate 12 and faces the supply passage 16. The magnetic force of the permanent magnet 35 reaches the supply passage 16 through the right plate 12.

  FIG. 13 shows that the radius of curvature of the imaginary circle (not shown) surrounding the outside of the total eight permanent magnets 35 substantially coincides with the radius of curvature of the first arcuate surface 12b1 constituting the storage chamber 14. If the width of the outer flat surface FP1 is increased or the permanent magnet 35 with a small diameter is used, the virtual circle comes to be located inside the first arcuate surface 12b1, and the permanent magnet 35 with a large diameter. Is used, the virtual circle comes to be located outside the first circular arc surface 12b1.

  Here, referring to FIGS. 14A to 14C, the part PA1 shown in FIG. 1A is supplied, and the circular groove 12b shown in FIG. 5A is adopted. In this case, a specific example that satisfies the above condition “the radius of curvature of the virtual circle VC (= circular orbit) is equal to or smaller than the radius of curvature of the outer arc surface 12b1 and equal to or larger than the radius of curvature of the inner arc surface 12b2” will be described.

  FIG. 14A shows a specific example in the case of “curvature radius of circular orbit = (curvature radius of outer circular arc surface 12b1 + curvature radius of inner circular arc surface 12b2) / 2”, and FIG. FIG. 14C shows a specific example in the case of the radius of curvature of the arc surface 12b1 + the radius of curvature of the inner arc surface 12b2) / 2> the radius of curvature of the circular orbit> the radius of curvature of the inner arc surface 12b2. A specific example in the case of “the radius of curvature of 12b1> the radius of curvature of the circular orbit> (the radius of curvature of the outer arcuate surface 12b1 + the radius of curvature of the inner arcuate surface 12b2) / 2” is shown.

  Under the above conditions, the specific example shown in FIG. 14A is most preferable, and then the specific example shown in FIG. 14B or FIG. 14C is preferable, but if the above condition is satisfied, “ Even if the radius of curvature of the circular track = the radius of curvature of the outer circular arc surface 12b1 ”or“ the radius of curvature of the circular track = curvature radius of the inner circular arc surface 12b2 ”, parts can be accommodated in the guide groove 15 described later with a high probability. It is well possible to do.

Although not shown,
When the part PA1 shown in FIG. 1 (A) is a supply target and the arc groove 12b shown in FIG. 5 (B) is adopted. The part PA2 shown in FIG. 1 (B) is a supply target. When the arc groove 12b shown in FIG. 5 (C) is employed. The part PA3 shown in FIG. 1 (C) is to be supplied and the arc groove 12b shown in FIG. 5 (D) is adopted.・ A cross-sectional shape that can accommodate parts that are similar to the shapes shown in FIGS. 1 (A) to 1 (C), spherical parts, etc., and that can be moved in a predetermined direction. Even when the arc groove 12b having the above is adopted, the above-mentioned conditions are the same, and therefore the same specific example as described above can be adopted as appropriate.

[Parts supply operation of bulk feeder]
Next, with reference to FIGS. 15 to 20, as an example, a case where the part PA1 shown in FIG. 1A is a supply target and the arc groove 12b shown in FIG. The “part supply operation of the bulk feeder” will be described. In this description, for convenience of explanation, the left, right, front, back, top, and bottom in FIG. 15 are referred to as front, back, left, right, top, and bottom, respectively, and directions corresponding to these in other drawings. Are referred to similarly. 15 and 20 indicate positions corresponding to the rotation center of the rotor 30.

  When supplying the parts, a case 10 is prepared in which a large number of parts PA1 are stored in the storage chamber 14 in a loose state (a state in which the directions are not aligned), and the case 10 is attached to the feeder main body by the method described above. Install (see FIG. 12).

  The part PA1 is stored in the storage chamber 14 of the case 10 through a replenishing port (not shown) with an opening / closing lid provided in the case 10 or a replenishing port (not shown) that can be closed with a seal. If the storage amount of the part PA1 is too large, the inflow probability of the part PA1 into the intake port 16a described later is lowered. Therefore, the maximum storage level of the part PA1 may be about ½ of the height of the storage chamber 14. preferable. For example, when the length L1 of the part PA1 is 1.0 mm, the case 10 having the same dimensions as the actual dimensions shown in FIGS. 3A to 3C is created, and the maximum storage level is set to the storage chamber 14. Even if the height dimension is about ½, about tens of thousands of parts PA1 can be accommodated.

  Then, the feeder main body to which the case 10 is attached, that is, the bulk feeder is installed on the feeder mounting base of the mounter (component mounting apparatus), and the rotor 30 is removed at a predetermined angle in the direction toward the outlet 17 as shown in FIG. For example, the component PA1 is preliminarily supplied (so-called stuffing) by rotating 180 to 1080 degrees.

As the rotor 30 rotates, each permanent magnet 35 provided on the rotor 30 is
Process PR1: Process in which one magnetic pole of the permanent magnet 35 faces the storage chamber 14 and moves while facing the guide groove 15. Process PR2: One magnetic pole of the permanent magnet 35 does not face the storage chamber 14 And the process / process PR3 which moves in a state of facing the supply passage 16: The one magnetic pole of the permanent magnet 35 does not face the storage chamber 14 and moves in a state of not facing the supply passage 16 in order. And move.

  In the process PR1, a plurality of components PA1 among the separated components PA1 stored in the storage chamber 14 are attracted in the direction of the guide groove 15 by the magnetic force of the permanent magnet 35, and the plurality of attracted components PA1 are agglomerated. As it is, it comes out of the component storage area, moves upward along the guide groove 15, and reaches the intake port 16a.

  Specifically, the two flat surfaces FP1 and FP2 exist in a state of being flush with the guide groove 15 between the outer side and the inner side of the guide groove 15, and the center of one magnetic pole of the permanent magnet 35 is the guide groove 15. As shown in FIG. 16, the mass of the plurality of parts PA1 attracted in the direction of the guide groove 15 by the magnetic force of the permanent magnet 35 is in contact with the guide groove 15 and the flat surfaces FP1 and FP2 on both sides thereof. Is a mountain-like form (see the two-dot chain line) or a form close to this. That is, using the flat surfaces FP1 and FP2 existing outside and inside the guide groove 15, as many parts PA1 as possible are sucked in the direction of the guide groove 15.

  The number of parts PA1 attracted in the direction of the guide groove 15 by the magnetic force of the permanent magnet 35 depends on the remaining number of parts PA1 in the storage chamber 14, the surface magnetic force of the permanent magnet 35, etc., but a sufficient amount of parts PA1. Is accommodated in the storage chamber 14, and the permanent magnet 35 has a surface magnetic force of, for example, 2000 to 4000 gauss, and a sufficient magnetic force reaches the component PA1 in the storage chamber 14, generally several tens to several One hundred.

  Further, since the center of one magnetic pole of the permanent magnet 35 faces the guide groove 15, the part PA1 that is closest to the permanent magnet 35 in the mass of the parts PA1 and faces the center (magnetic force center). The force to be pulled into the guide groove 15 is the strongest. Moreover, when the mass of the plurality of parts PA1 moves upward along the guide groove 15, the part PA1 close to the guide groove 15 in the mass of the plurality of parts PA1 has two circles on the opening side of the guide groove 15. An action occurs in which the direction of the arcuate edge is touched and the orientation thereof is corrected.

  That is, in the process PR1, a plurality of parts PA1 as much as possible are attracted in the direction of the guide groove 15 by the magnetic force of the permanent magnet 35, and a plurality of parts PA1 attracted in the direction of the guide groove 15 by the magnetic force of the permanent magnet 35 are combined. One or a plurality of parts PA1 among the parts PA1 can be accommodated in the guide groove 15 in the length direction with high probability based on the above action.

  Incidentally, since the part PA1 has a rectangular parallelepiped shape having a dimensional relationship of length L1> width W1 = height H1, the direction of the part PA1 accommodated in the guide groove 15 is basically the length direction (FIG. 17) and the direction PA 90 different from the length direction (see FIG. 18), and the part PA1 not accommodated in the guide groove 15 is in a loose state (see FIG. 16).

  When one or a plurality of parts PA1 accommodated in the guide groove 15 is “part PA1 accommodated in the length direction in the guide groove 15” or “length direction in the guide groove 15” When the “part PA1 accommodated in the guide groove 15 in a direction different from the length direction by 90 degrees” is present behind the “part PA1 accommodated in”, as shown in FIG. The part PA1 ”housed in the length direction inside is moved upward along the guide groove 15 while being attracted by the magnetic force of the permanent magnet 35, flows into the intake port 16a in the same direction, and enters the supply passage 16. Is taken in. At the time of this inflow, the “part PA1 accommodated in the guide groove 15 in a direction different from the length direction by 90 degrees” and the “part PA1 not accommodated in the guide groove 15” are present on the left side of the intake port 16a. It abuts on the flat surface 11b4, and drops when the one magnetic pole of the permanent magnet 35 passes the right side of the intake port 16a and the attractive force is reduced.

  From the above action, there is a probability that one or more parts PA1 accommodated in the guide groove 15 are “parts PA1 accommodated in the guide groove 15 in a direction different from the length direction by 90 degrees”. In this case, as shown in FIG. 18, “part PA1 accommodated in the guide groove 15 in a direction different from the length direction by 90 degrees” and “part PA1 not accommodated in the guide groove 15” are as follows. Then, it comes into contact with the second flat surface 11b4 existing on the left side of the intake port 16a, and when the one magnetic pole of the permanent magnet 35 passes the right side of the intake port 16a and the attractive force is reduced, it drops downward.

  Further, in the process PR2, the lengthwise component PA1 that has flowed into the intake port 16a from the guide groove 15 is attracted by the magnetic force of the permanent magnet 35 as shown in FIG. To reach the take-out port 19 and stop when its front surface abuts against the rear end of the stopper 13. At the time of preliminary supply, the rotor 30 rotates, for example, by 180 to 1080 degrees, so that a plurality of parts PA1 are connected to the rear side of the leading part PA1 that stops by contacting the rear end of the stopper 13.

  Further, in the process PR3, since the magnetic force of the permanent magnet 35 is suppressed from reaching the part PA1 in the storage chamber 14, unnecessary fluctuations in the part PA1 in the storage chamber 14 due to the magnetic force of the permanent magnet 35, for example, guidance It is possible to prevent the occurrence of fluctuations that are not related to the component accommodation in the groove 15 and the component inflow into the intake port 16a.

  After the preliminary supply is completed, as shown in FIG. 20, the one permanent magnet 35 of the permanent magnet 35 exists at a position past the right side of the outlet 17 and the rear permanent magnet 35 following the permanent magnet 35 is present. The rotor 30 is stopped so that one of the magnetic poles exists at a position where it enters the right side of the supply passage 16 (hereinafter, the stop position of the rotor 30 is referred to as a rotor stop position).

  The leading part PA1 is taken out by the mounter suction nozzle AN (see FIG. 22) at this rotor stop position. Specifically, the suction nozzle is lowered toward the outlet 17 to suck the leading part PA1, and then the suction nozzle is raised. The part PA1 taken out through the outlet 17 is a circuit board or the like. Mounted on the load.

The intention of setting the rotor stop position as described above is
Intent IN1: The stopper 13 is magnetized by the magnetic force of the permanent magnet 35 that has passed the right side of the outlet 17 and supplied by the magnetic force generated at the rear end of the magnetized stopper 13, the leading part PA1 in the passage 16 is supplied to the stopper 13 • Intention IN2: When the leading part PA1 is taken out by the mounter's suction nozzle AN through the takeout port 17, the suction of the part PA1 taken out due to the attraction by the magnetic force of the permanent magnet 22c. Avoiding disturbance in posture and suction position ・ Intention IN3: Among the parts PA1 existing in the supply path 16, other parts PA1 except the leading part PA1 move by their own weight along the supply path 16 However, by stopping the movement of the dead weight by the attraction by the magnetic force of the rear permanent magnet 22c, the other part PA1 is removed from the supply passage 16. The purpose is to prevent discharge and return to the storage chamber 14.

  Here, the intention IN1 will be supplemented. At the rotor stop position, the magnetic force based on one magnetic pole of the permanent magnet 35 reaches the front end of the stopper 13 to magnetize the stopper 13, and the same polarity as the one magnetic pole appears at the rear end of the magnetized stopper 13, The leading part PA1 abutting against the rear end of the stopper 13 is attracted by the magnetic force based on the polarity, and the leading part PA1 is held by the attraction. Since the magnetic force (attraction force) generated at the rear end of the stopper 13 is obtained by magnetizing the stopper 13 with the magnetic force of the permanent magnet 35, it is smaller than the surface magnetic force of the permanent magnet 35. That is, the magnetic force generated at the rear end of the stopper 13 is weak enough to maintain the leading part PA1 in contact with the rear end of the stopper 13 in a contact state, for example, about several gauss to several tens of gauss. , The holding can be performed sufficiently.

  Further, when the stopper 13 is magnetized by the magnetic force of the permanent magnet 35 that has passed the right side of the outlet 17, adjustment of the magnetic force generated at the rear end of the stopper 13 (adsorption force adjustment) changes the rotor stop position. Specifically, this can be easily performed by changing the angle θ shown in FIG. For example, when the attracting force is too strong at the rotor stop position shown in FIG. 20, the angle θ may be increased so that the permanent magnet 35 is separated from the stopper 13, and conversely, the rotor stop shown in FIG. If the attracting force is too weak at the position, the angle θ may be decreased so that the permanent magnet 35 approaches the stopper 13. Incidentally, “when the suction force is too strong” means that the suction force of the leading part PA1 with respect to the rear end of the stopper 13 hinders the removal of the part PA1, and “when the suction force is too weak” This means that the leading part PA1 cannot be sufficiently held by the magnetic force.

  If a permanent magnet stopper having the same size as the stopper 13 is used in place of the magnetizable stopper 13, the leading part PA1 can be held by magnetic force. When such a permanent magnet stopper is used, the stopper 13 is used. Compared to the case, the cost of parts increases. Further, since the permanent magnet stopper has a specific surface magnetic force, the above-described adjustment of the attractive force cannot be performed. In other words, in order to eliminate such a problem, a method is adopted in which the stopper 13 is magnetized by the magnetic force of the permanent magnet 35 that has passed the right side of the outlet 17.

  After the leading part PA1 is taken out by the mounter suction nozzle AN through the take-out port 17, the rotor 30 at the rotor stop position is moved to the take-out port 17 at a predetermined angle, for example, 45 degrees, 90 degrees, 135 degrees or 180 degrees. And the rotor 30 is stopped again at the rotor stop position. Since the removal of the part PA1 by the suction nozzle can be easily detected by a sensor (not shown), the rotation of the rotor 30 can be started based on the detection signal.

  When the rotor 30 at the rotor stop position is rotated by a predetermined angle in the direction toward the outlet 17, “accommodation of the component PA 1 in the guide groove 15” and “inflow of the component PA 1 from the guide groove 15 to the intake port 16 a” Then, “the movement of the part PA1 in the supply passage 16” is performed in the same manner as described above, and the part PA1 is again supplied to the outlet 17. Thereafter, each time the leading part PA1 is taken out through the takeout port 17, the rotor 30 at the rotor stop position rotates by a predetermined angle in the direction toward the takeout port 17.

The “bulk feeder component supply operation” is an example in which the component PA1 shown in FIG. 1A is supplied and the circular groove 12b shown in FIG. 5A is adopted. I explained,
When the part PA1 shown in FIG. 1 (A) is a supply target and the arc groove 12b shown in FIG. 5 (B) is adopted. The part PA2 shown in FIG. 1 (B) is a supply target. When the arc groove 12b shown in FIG. 5 (C) is employed. The part PA3 shown in FIG. 1 (C) is to be supplied and the arc groove 12b shown in FIG. 5 (D) is adopted.・ A cross-sectional shape that can accommodate parts that are similar to the shapes shown in FIGS. 1 (A) to 1 (C), spherical parts, etc., and that can be moved in a predetermined direction. Even when the arc groove 12b having the same is employed, the “part supply operation of the bulk feeder” can be realized regardless of the size of the part. Among these cases, “when the part PA1 shown in FIG. 1A is supplied and the circular groove 12b shown in FIG. 5B is adopted” is shown by a broken line in FIG. 5B. As shown, the part PA1 can be accommodated in the guide groove 15 in a length direction where the surfaces of the width or height are not aligned. However, in the process of moving in the guide groove 15 and in the process of moving in the supply passage 16, Since the displacement that stabilizes the posture occurs in the PA 1 itself, the part PA 1 is supplied to the take-out port 17 in a posture in which the surfaces of the width or the height are aligned.

[Part behavior in supply passage]
Next, with reference to FIGS. 21 to 25, the case where the part PA1 shown in FIG. 1A is supplied and the circular groove 12b shown in FIG. The “part behavior in the supply passage” related to the “part supply operation of the bulk feeder” will be described in detail.

  Since the “part behavior in the supply passage” in the actual product is extremely fast and difficult to observe by direct viewing, the observation was performed by visually observing a slow reproduction of a moving image captured by a high-speed camera. In observation, a chip capacitor having a length L1 of 0.6 mm, a width W1 and a height H1 of 0.3 mm (so-called 0603 size chip capacitor) is used as the component PA1, and the rotation angle of the rotor 30 is 45 degrees. And the time required for the 45 ° rotation was 30 msec. The total number of parts PA1 in the supply passage 16 shown in FIGS. 21 to 25 is exemplary, and in practice, the total number of parts PA1 in the supply passage 16 is −2 every time the rotor 30 rotates 45 degrees. Note that there were ~ + 5 variations.

  FIG. 21 shows a state where the rotor 30 is stopped at the rotor stop position. As can be seen from the figure, there are two parts PA1 connected to the rear end of the stopper 13 and five parts on the rear side in the supply passage 16 at a distance from the two parts PA1. PA1 exists in a row, and the five parts PA1 are restrained from moving under their own weight due to attraction by the magnetic force of the permanent magnet 35 on the rear side.

  By the way, according to observation, when three or four parts PA1 are present at the rear end of the stopper 13, or four, six or seven parts PA1 are continued at the rear side in the supply passage 16. Have been confirmed.

The reason why the two parts PA1 are present at the rear end of the stopper 13 is as follows.
Reason RE1: The leading component PA1 is attracted to the trailing end of the stopper 13 by the magnetic force generated at the trailing end of the stopper 13 magnetized by the front permanent magnet 35, and the leading component PA1 magnetized by the attracting The second part PA1 is attracted to the rear end of the leading part PA1 by the magnetic force generated at the rear end, and three or four parts PA1 are present at the rear end of the stopper 13. The reason is in the same magnetic force transmission as described above.

  That is, by appropriately setting the magnetic force generated at the rear end of the stopper 15 based on the position of the front permanent magnet 35, at least one component PA1 is connected to the front part PA1 attracted to the rear end of the stopper 13. Can exist.

  FIG. 22 shows a state in which the leading part PA1 is taken out by the suction nozzle AN through the takeout port 17 at the rotor stop position. As can be seen from the figure, the second part PA1 remains in the vicinity of the take-out port 17 out of the two parts PA1 that are connected to the rear end of the stopper 13.

  Incidentally, according to observation, when three parts PA1 are continuously present at the rear end of the stopper 13, the second and third parts PA1 remain in the vicinity of the outlet 17, It has been confirmed that the second to fourth parts PA1 remain in the vicinity of the take-out port 17 when four parts PA1 are continuously present at the rear end.

The reason why the second part PA1 remains in the vicinity of the outlet 17 even if the first part PA1 is taken out is as follows.
Reason RE2: The second part PA1 is held in a non-contact state by the attractive force generated by the magnetic force generated at the rear end of the stopper 13 magnetized by the front permanent magnet 35. The reason why the individual or three parts PA1 remain is also in the non-contact suction as described above.

  That is, by appropriately setting the magnetic force generated at the rear end of the stopper 15 based on the position of the front permanent magnet 35, at least one component PA1 remains in the vicinity of the takeout port 17 even if the leading component PA1 is taken out. be able to.

  FIG. 23 shows a state in which the rotor 30 has rotated about 20 degrees after the leading part PA1 is taken out. As can be seen from the figure, the five parts PA1 existing on the rear side in the supply passage 16 move upward along the supply passage 16 while being attracted by the magnetic force of the permanent magnet 35 on the rear side. When the five parts PA1 moving upward along the supply passage 16 approach the one part PA1 remaining in the vicinity of the take-out port 17, the one part PA1 is attracted to the five parts PA1. Be united.

  Incidentally, according to observation, when two or three parts PA1 remain in the vicinity of the take-out port 17, the number of parts PA1 existing on the rear side in the supply passage 16 is four, six, or seven. Also in this case, it has been confirmed that the above-mentioned drawing and coalescence occur. Further, when the number of parts PA1 present on the rear side is large (for example, five or more), the rear permanent magnet 35 is shifted forward from the part PA1 immediately after the rotor 30 starts rotating. As a result, it has been confirmed that one or more parts PA1 on the rear side are separated, and the separated parts PA1 are moved by their own weight downward along the supply passage 16 and returned into the storage chamber 14.

The reason why the pulling and coalescence occur is as follows:
Reason RE3: Five parts PA1 existing on the rear side in the supply passage 16 move upward along the supply passage 16 while being attracted by the magnetic force of the rear permanent magnet 35, and the permanent permanent magnet 35 Approaches one remaining part PA1 in the vicinity of the take-out port 17, the attractive force of the permanent magnet 35 acts on the remaining one part PA1 and is attracted to the five parts PA1. In particular, when two or three parts PA1 remain in the vicinity of the take-out port 17, the reason for drawing and coalescence, and the number of parts PA1 existing on the rear side in the supply passage 16 is four or six. Or the reason of drawing and uniting in the case of seven is also in the same magnetic attraction.

  That is, the above-described pulling and combining can be performed by appropriately setting the attractive force by the magnetic force of each permanent magnet 35 including the rear permanent magnet 35.

  FIG. 24 shows a state in which the permanent magnet 35 on the rear side of the rotor 30 after rotation has reached the right side of the outlet 17. As can be seen from the figure, the six parts PA1 moving upward along the supply passage 16 as the rear permanent magnet 35 moves are such that the leading part PA1 abuts against the rear end of the stopper 13. By the way, it moves relatively backward. Further, the rear two parts PA1 are separated from the six parts PA1 including the leading part PA1 in contact with the rear end of the stopper 13, and the separated two parts PA1 are provided along the supply passage 16. Moves under its own weight.

  Incidentally, according to observation, when the number of parts PA1 moving upward along the supply passage 16 with the movement of the rear permanent magnet 35 is large (for example, 5 or more), one or more parts are used. It has been confirmed that PA1 is separated. In addition, when the number of parts PA1 moving upward along the supply passage 16 with the movement of the rear permanent magnet 35 is small (for example, four or less), it is confirmed that the separation hardly occurs. Yes.

The reason why the separation occurs is as follows:
Reason RE4: In a state where the rear permanent magnet 35 reaches the right side of the outlet 17, the attractive force due to the magnetic force of the permanent magnet 35 is applied to the two rear parts PA1 of the six parts PA1. As a result, the two rear parts PA1 move by their own weight along the supply passage 16, and the rear permanent magnet 35 moves upward along the supply passage 16. The reason for separation when there are a large number of parts PA1 that move in the same way is also the same as the above-described suction force.

  That is, by appropriately setting the attractive force due to the magnetic force of each permanent magnet 35 including the rear permanent magnet 35, the component PA 1 that moves upward along the supply passage 16 along with the movement of the rear permanent magnet 35. The separation can be performed when the number is large.

  FIG. 25 shows a state in which the permanent magnet 35 on the rear side of the rotor 30 after rotation has passed the right side of the outlet 17. As can be seen from the figure, with the further movement of the rear permanent magnet 35, the two rear parts PA1 are separated from the four parts PA1 including the front part PA1 in contact with the rear end of the stopper 13. Then, the two separated parts PA1 move by their own weight along the supply passage 16 downward. Further, the next rear permanent magnet 35 enters the right side of the supply passage 16, and the part PA1 attracted by the magnetic force of the permanent magnet 35 flows into the supply passage 16 through the intake port 16a.

  Incidentally, according to observation, when the number of parts PA1 including the leading part PA1 in contact with the rear end of the stopper 13 is large (for example, 5 or more), one or more parts PA1 may be separated. It has been confirmed. It has also been confirmed that the separation is unlikely to occur when the number of parts PA1 including the leading part PA1 in contact with the rear end of the stopper 13 is small (for example, four or less).

The reason why the separation occurs is as follows:
Reason RE5: When the rear permanent magnet 35 passes the right side of the outlet 17, the attractive force due to the magnetic force of the permanent magnet 35 becomes difficult to reach the rear two of the four parts PA1. Thus, the two rear parts PA1 move by their own weight along the supply passage 16, and the separation when the number of parts PA1 including the front part PA1 in contact with the rear end of the stopper 13 is large is performed. The reason for this is that the same attractive force is insufficient, but the possibility of the magnetic force transmission described in RE1 cannot be denied.

  The time required for the rear permanent magnet 35 at the position shown in FIG. 24 to move to the position shown in FIG. 25 is several milliseconds, and in the state shown in FIG. 25, the magnetic force of the next rear permanent magnet 35 is shown. The part PA1 sucked by the air flows into the supply passage 16 through the intake port 16a. Therefore, although the two parts PA1 separated earlier and the two parts PA1 separated thereafter move by their own weight along the supply passage 16, the movement is restrained by the part PA1 flowing into the supply passage 16. Further, since the part PA1 that has flowed into the supply passage 16 is united with the four parts PA1, in the state where the 45 degree rotation of the rotor 45 is completed and stopped, as shown in FIG. There are two parts PA1 on the front side, and five parts PA1 are present on the rear side in the supply passage 16 at a distance from the two parts PA1.

The “part behavior in the supply passage” is exemplified by the case where the part PA1 shown in FIG. 1A is supplied and the circular groove 12b shown in FIG. 5A is used. I explained,
When the part PA1 shown in FIG. 1 (A) is a supply target and the arc groove 12b shown in FIG. 5 (B) is adopted. The part PA2 shown in FIG. 1 (B) is a supply target. When the arc groove 12b shown in FIG. 5 (C) is employed. The part PA3 shown in FIG. 1 (C) is to be supplied and the arc groove 12b shown in FIG. 5 (D) is adopted.・ A cross-sectional shape that can accommodate parts that are similar to the shapes shown in FIGS. 1 (A) to 1 (C), spherical parts, etc., and that can be moved in a predetermined direction. Even when the arc groove 12b having the same is adopted, the “part behavior in the supply passage” similar to the above can be realized regardless of the part size.

  Further, the “behavior of the components in the supply passage” has been described by taking as an example a case where the rotation angle of the rotor 30 is 45 degrees and the time required for the rotation of 45 degrees is 30 msec. Even when the rotation angle is set to 90 degrees, 135 degrees, or 180 degrees, and the time required for the angle rotation is set to another value of 50 msec or less, the same “part behavior in the supply passage” can be realized.

[Effects obtained by component supply method realized by bulk feeder]
Next, effects obtained by the component supply method realized by the bulk feeder described with reference to FIGS.

  (1) According to the bulk feeder, the front permanent magnet 35 exists at a position past the right side of the outlet 17, and the rear permanent magnet 35 following the permanent magnet 35 is on the right side of the supply passage 16. The rotor 30 is stopped in the state where it enters, and in the rotor stop position, the stopper 13 is magnetized by the magnetic force of the permanent magnet 35 on the front side, and the magnetic force generated in the magnetized stopper 13 causes the inside of the supply passage 16. The top part of the motor is attracted to the stopper 13, and the other parts in the supply passage 16 are prevented from moving downward along the supply path 16 by the attractive force of the magnetic force of the rear permanent magnet 35. The rotor 30 is rotated by a predetermined angle in the direction toward the outlet 17 every time the leading part is taken out through the outlet 17, and the same state as the rotor stop position is obtained. The stopper 13 is magnetized by the magnetic force of the permanent magnet 35 on the front side even at the rotor stop position, and the leading part in the supply passage 16 is attracted to the stopper 13 by the magnetic force generated in the magnetized stopper 13. At the same time, it is possible to realize a component supply method in which other components in the supply passage 16 are restrained from moving downward along the supply passage 16 by the attractive force generated by the magnetic force of the rear permanent magnet 35. .

  That is, according to this component supply method, at the rotor stop position, the leading component in the supply passage 16 is attracted to the stopper 13 by the magnetic force generated in the magnetized stopper 13, so that the leading component is removed. Since it can be held, the operation of taking out the leading part through the outlet 17 by the suction nozzle AN of the mounter can be carried out without any trouble, and even if the time interval at which the leading part is taken out becomes short, for example, the part picking time interval Even if is 50 msec or less, the same operation can be performed satisfactorily.

  Moreover, at the rotor stop position, other parts in the supply passage 16 are prevented from moving downward along the supply passage 16 by the attractive force generated by the magnetic force of the rear permanent magnet 35. Since other parts PA1 can be prevented from being discharged from the supply passage 16 (returned into the storage chamber 14), the parts supplied to the outlet 17 can be stored in the supply passage 16. That is, since the parts stored in the supply passage 16 can be sequentially supplied to the take-out port 17, the supply of the parts to the take-out port 17 can be quickly performed, and even if the time interval at which the leading part is taken out becomes short, For example, even when the time interval for picking up the components is 50 msec or less, the components can be supplied following the time interval.

  (2) According to the component supply method, in the rotor stop position, the position of the front permanent magnet 35 is such that at least one component is connected to the leading component adsorbed by the stopper 13. Therefore, the magnetic force generated at the rear end of the stopper 13 is set.

  That is, according to the component supply method, the component connected to the leading component adsorbed by the stopper 13 can be used as the posture correcting means for the leading component. It is possible to accurately correct and optimize the front end of the connected parts, and by this optimization, the work of taking out the leading part through the outlet 17 by the suction nozzle AN of the mounter can be performed more accurately.

  In addition, since the component connected to the leading component is in contact with the leading component and has a refuge in the rear, the connected component is a load or resistance when the leading component is taken out by the suction nozzle AN of the mounter. It will not be. Accordingly, the leading part can be smoothly taken out, and when the leading part is taken out, there is no occurrence of a posture failure such as inclination in the parts connected to the leading part.

  (3) According to the component supply method, before the rear permanent magnet 35 reaches the right side of the outlet 17 by the rotation of the rotor 30 after the leading component is taken out, the rear permanent magnet 35 Each permanent magnet including the rear permanent magnet 35 so that at least one part remaining in the vicinity of the outlet is attracted to and merged with other parts that move upward along the supply passage 16 while being attracted by the magnetic force. An attractive force of 35 is set.

  In other words, the other part moving upward along the supply passage 16 while being attracted by the magnetic force of the rear permanent magnet 35 can be given a movement to draw at least one part remaining in the vicinity of the outlet, so that the outlet can be Even if a posture failure occurs in at least one component remaining in the vicinity, the posture failure can be eliminated by the pulling operation.

  Moreover, since the combined parts move upward along the supply passage 16 while being attracted by the magnetic force of the rear permanent magnet 35, it is possible to stabilize the posture of each of the combined parts even in this moving process. it can.

[Case modification]
(1) As the case 10, the arc groove 12b has an angle range of about 180 degrees, the guide groove 15 has an angle range of about 150 degrees, and the supply passage 16 has an angle range of about 30 degrees. The angle range of the groove 12b may be increased or decreased within an appropriate range, for example, a range of ± 30 degrees without changing the upper end position. Further, the angle range of the supply passage 16 may be increased or decreased within an appropriate range, for example, ± 15 degrees without changing the upper end position. Since the sum of the angle range of the guide groove 15 and the angle range of the supply passage 16 is substantially equal to the angle range of the arc groove 12b, if the angle range of the guide groove 15 is increased or decreased, the guide groove 15 The angle range also increases or decreases.

  (2) Although the case 10 is assembled using the set screw FS, the screw hole 11a is eliminated from the left plate 11, and the screw insertion hole 12a is eliminated from the right plate 12, instead of these. A through-hole may be formed in both, and after joining the left board 11 and the right board 12, a plastic pin may be inserted into both through-holes, and the both ends may be heat-melted to perform the coupling. Further, the screw hole 11a is eliminated from the left plate 11 and the screw insertion hole 12a is eliminated from the right plate 12, and both contact surfaces are partially connected by a technique such as thermal welding or adhesion. You may make it combine.

  (3) Although the case 10 using each set screw FS containing a material belonging to a ferromagnetic material in order to be able to be attracted to the permanent magnet 25 of the frame 20 is shown, the material is not suitable for attraction When the case 10 is assembled without using a set screw as described above, an object to be adsorbed (not shown) having a predetermined shape including a material belonging to a ferromagnetic material is placed on the right side of the case 10. It may be embedded in the right surface of the plate 12 and attracted to the permanent magnet 25 of the frame 20.

[Modified example of feeder body]
(Modified frame)
(1) Although the frame 20 is shown with two positioning pins 24 provided, three or four positioning pins 24 may be provided and positioning holes 12e corresponding to the positioning pins may be provided in the case 10. good. Moreover, although the thing provided with the total three permanent magnets 25 which can adsorb | suck the head of set screw FS of case 10 was shown, if the same adsorption | suction can be performed, two or four permanent magnets 25 will be provided. You may provide and the position is also arbitrary. Further, although the positioning pin is provided on the frame side and the positioning hole is provided on the case side, the positioning pin may be provided on the case side and the positioning hole may be provided on the frame side.

  (2) Although the frame 20 has a case mounting portion 26 that allows the case 10 to be attached / detached in the left / right direction, a case mounting portion that can be attached / detached in the vertical direction is provided instead of the case mounting portion 26. Also good. For example, the positioning hole 12e is excluded from the case 10 and the positioning pin 24 and the permanent magnet 25 are excluded from the frame 20. Instead, a wall having a U-shape in top view is provided on the left surface of the rotor arrangement portion 23. 10 can be inserted from above, and a space with a rectangular top view is formed, and a biasing means such as a leaf spring is provided in the wall to hold a predetermined three-dimensional position of the case 10 inserted into the space. Like that. If such a case attachment portion that can be attached and detached in the vertical direction is provided, attachment by insertion from above the case 10 and removal by extraction upward are possible.

(Modification of rotor)
As the rotor 30, a total of eight permanent magnets 35 are arranged at intervals of 45 degrees, but the number and angular interval of the permanent magnets 35 may be increased or decreased. For example, even if a total of 16 permanent magnets 35 are arranged at intervals of 22.5 degrees, or a total of 4 permanent magnets 35 are arranged at intervals of 90 degrees, the same component supply operation as described above can be realized. it can. The number of permanent magnets 35 is related to the rotational speed of the rotor 30, but the number of permanent magnets 35 is preferably 4 to 16 in order to accurately perform the component supply operation. Further, the angular intervals of the permanent magnets 35 may not be equal, but it is easier to control the rotation of the rotor 30 in the component supply operation when the intervals are equal.

(Modification of rotation transmission from drive gear to rotor)
Although the relay gear 60 is provided on the frame 20 to transmit the rotation of the drive gear 50 to the rotor 30, the spur teeth on the outer peripheral surface of the drive gear 50 fixed to the motor shaft 43 are directly connected to the outer periphery of the rotor 30. If meshing with the flat teeth 34 on the surface, the relay gear 60 can be eliminated. When there is a distance between the rotor 30 and the drive gear 50, two or more relay gears 60 may be interposed between the rotor 30 and the drive gear 50.

  PA1, PA2, PA3 ... parts, 10 ... case, 13 ... stopper, 14 ... storage chamber, 15 ... guide groove, 16 ... supply passage, 16a ... intake, 17 ... take-out port, 20 ... frame, 26 ... case mounting Part, 30 ... rotor, 35 ... permanent magnet, 40 ... motor, 50 ... drive gear, 60 ... relay gear.

Claims (3)

A component supply method for moving a component along a supply passage and supplying the component to an outlet,
An arcuate supply path from bottom to top, a magnetizable stopper with which the leading part in the supply path comes into contact, and a top opening outlet for taking out the leading part that has stopped in contact with the stopper from the supply path And a rotor in which a plurality of permanent magnets movable in a state facing the supply passage are provided at intervals,
The rotor is stopped in a state where one permanent magnet is present at a position past one side of the outlet and a permanent magnet different from the one permanent magnet is present at one side of the supply passage; At the rotor stop position, the stopper is magnetized by the magnetic force of one permanent magnet, the leading part in the supply passage is attracted to the stopper by the magnetic force generated in the magnetized stopper, and another permanent magnet is Direction in which the other components in the supply passage are prevented from moving downward along the supply passage due to magnetic attraction, and each time the leading component is taken out through the take-out port at the rotor stop position To the same position as the rotor stop position. In the component supply method according to claim 1,
At the rotor stop position, the magnetic force generated in the stopper is set based on the position of one permanent magnet so that at least one part is continuously connected to the leading part attracted by the stopper. In the component supply method according to claim 2,
The other permanent magnet moves upward along the supply passage while being attracted by the magnetic force of the other permanent magnet just before the other permanent magnet reaches one side of the outlet by the rotation of the rotor after the leading part is taken out. The attraction force by the magnetic force of each permanent magnet including another permanent magnet is set so that at least one part remaining in the vicinity of the take-out port is attracted to and merged with the part.

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