JP2019013997A - Workpiece feeding device and workpiece grinding machine - Google Patents

Abstract

To provide a workpiece feeding device and a workpiece grinding machine which can securely feed a workpiece at low cost and at high speed as compared with a conventional one.SOLUTION: A workpiece feeding device 10 positions a workpiece discharge port 26 of a workpiece feeder 11 in a position opposite to a workpiece storing hole 31 and receives power toward a terminal point side of a first direction H1 from an engagement protrusion part 32 when an engagement abutment part of the workpiece feeder 11 is pushed to the engagement protrusion part 32 of a rotary disk 12. Thereby, the workpiece discharge port 26 moves by following the workpiece storing hole 31 and an opposite state of the workpiece discharge port 26 and the workpiece storing hole 31 can be maintained only by bringing the engagement abutment part close to the engagement protrusion part 32 and pushing from the second direction H2 with the workpiece feeder 11 arranged on an original point of the first direction H1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a workpiece feeding device that distributes a plurality of workpieces discharged by a workpiece feeder to a plurality of workpiece receiving holes in a rotating turntable and feeds them to a predetermined processing device, and such a workpiece feeding device. The present invention relates to a workpiece grinding machine including a feeding device.

  Conventionally, as a workpiece feeding device of this type, a workpiece feeder is attached to a robot, and each time a workpiece receiving hole of a rotating disk passes a reference position, a workpiece discharge port of the workpiece feeder is opposed to the workpiece receiving hole. In addition, there is known one in which a robot operates (see, for example, Patent Document 1).

Japanese Patent No. 5-45964 (first page, right column, 23rd line to second page, left column, 15th line, FIGS. 1 and 5)

  However, in the above-described conventional workpiece feeding device, there is a case where the workpiece does not enter the workpiece accommodation hole and is not fed due to a positional deviation between the workpiece accommodation hole and the workpiece discharge port of the workpiece feeder. Further, if the rotation speed of the rotating disk is slowed to solve this problem, productivity has been a problem. Furthermore, the high cost of the robot has also been a problem.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a workpiece feeding device and a workpiece grinding machine capable of feeding workpieces at high speed and surely at a lower cost than conventional ones.

  Invention of Claim 1 made | formed in order to achieve the said objective is a rotating disk provided with the workpiece feeder which discharge | emits a workpiece | work one by one, the some workpiece | work accommodation hole which accommodates the said workpiece | work one by one in a circle, When the work receiving hole passes through a preset reference position in a state where the turntable is rotating, the work feeder is moved so that the work discharge port of the work feeder faces the work receiving hole. A feeder moving mechanism, wherein the workpiece moving device distributes the plurality of workpieces discharged by the workpiece feeder to the plurality of workpiece receiving holes and feeds the workpiece to a predetermined processing device. The engagement protrusion protruding from the opening edge of each workpiece receiving hole and the work feeder are terminated in the first direction along the movement direction of the engagement protrusion. First support means for supporting reciprocating movement between points, origin return means for returning the work feeder to the origin, and approaching and separating the work feeder from the side to the engagement protrusion Second support means for supporting the reciprocating movement in the second direction, second direction driving means for reciprocating the work feeder in the second direction, and the second direction driving means provided in the work feeder. Is pressed against the engaging protrusion from the side to position the work discharge port at a position facing the work receiving hole, and power toward the end point in the first direction is applied to the engaging protrusion. And an engagement contact portion that is received from the workpiece feeding device.

  According to a second aspect of the present invention, there is provided a concentric arc surface formed on one of the engagement protrusion or the engagement contact portion and forming one concentric circle of the work receiving hole or the work discharge port, and the engagement protrusion. A centering contact portion formed on the other of the first contact portion and the engagement contact portion and contacting the concentric arc surface and centering the work receiving hole and the work discharge port. It is a workpiece feeding apparatus of description.

  According to a third aspect of the present invention, a cylindrical body is fitted and fixed to a plurality of fitting holes formed in the rotating disk, the inner side of the cylindrical body forms the workpiece receiving hole, and a part of the cylindrical body is the The workpiece feeding device according to claim 2, wherein the engagement protrusion is formed by protruding from a rotating disk, and an outer surface of the engagement protrusion is the concentric arc surface.

  According to a fourth aspect of the present invention, the engagement contact portion includes a substantially U shape including an arc surface having a radius of curvature substantially the same as the concentric arc surface, and a substantially V shape that contacts two locations of the concentric arc surface. The workpiece feeding device according to claim 3, further comprising a substantially L-shaped contact surface.

  A fifth aspect of the present invention is the workpiece feeding device according to any one of the first to fourth aspects, wherein the origin side in the first direction is substantially L-shaped and opened.

  According to a sixth aspect of the present invention, the origin return means is an air actuator that constantly urges the workpiece feeder toward the origin by air pressure. The workpiece feeding according to any one of the first to fifth aspects Device.

  According to a seventh aspect of the present invention, the first direction is linear, and the first support means supports the first table movably on a first guide that extends linearly in the first direction, The work according to any one of claims 1 to 6, wherein the second support means is movably supported by a second guide fixed to the first table and extending linearly in the second direction. It is a feeding device.

  The invention according to claim 8 is a workpiece feeding device according to any one of claims 1 to 7, and a grinding device as the predetermined processing device having a pair of rotating grindstones opposed in the vertical direction. The rotating disk rotates in a state where a part of the rotating disk is disposed between the pair of rotating grindstones, and the work receiving hole penetrates the rotating disk up and down, Below is a workpiece grinding machine provided with a support plate for supporting the workpiece in the workpiece accommodation hole from below on the outside between the pair of rotating grindstones.

  In the workpiece feeding device according to claim 1, the engaging projection protrudes from each workpiece receiving hole of the rotating disk, and the work feeder is located on the first direction along the moving direction of the engaging projection and on the side of the engaging projection. Is supported so as to be able to reciprocate in a second direction approaching and separating from the direction. Further, the work feeder is provided with an engagement contact portion that is pressed from the side against the engagement protrusion. When the engagement contact portion is pressed against the engagement protrusion, the workpiece discharge port of the work feeder is positioned at a position facing the workpiece accommodation hole, and the power directed toward the end point in the first direction is engaged. Receive from the protrusion. As a result, the work feeder moves following the work accommodation hole only by driving the engagement contact portion of the work feeder against the engagement protrusion in the second direction. Can be maintained in the opposite state. Further, if the engagement contact portion is separated from the engagement protrusion in the second direction and returned to the origin, the workpiece discharge port can follow the next workpiece accommodation hole in the same manner. That is, as a drive source or urging means for moving the work feeder, an origin return means for moving the work feeder to one side in the first direction, and a second direction driving means for moving the one side and the other side in the second direction. The workpiece discharge port can be made to follow the workpiece accommodation hole, and the cost can be reduced as compared with the conventional robot, and the weight can be reduced, so that high speed operation is possible. In addition, since the workpiece discharge port and the workpiece accommodation hole are reliably positioned by the contact between the engagement contact portion and the engagement protrusion, the workpiece can be reliably accommodated in the workpiece accommodation hole. it can. That is, according to the workpiece feeding device of the present invention, the workpiece can be fed at high speed and surely at a lower cost than in the past.

  According to the workpiece feeding device of claim 2, concentric arcs provided on one and the other of the engagement protrusion and the engagement contact portion while the workpiece discharge port moves following the workpiece accommodation hole. The centering state in which the surface and the centering contact portion are in sliding contact with each other and the center axes of the workpiece accommodation hole and the workpiece discharge port coincide with each other is maintained. Thereby, a workpiece | work can be reliably accommodated in a workpiece | work accommodation hole.

  Further, the engaging protrusion may be constituted by a plurality of protrusions arranged on concentric circles of the work accommodating hole, or a plurality of fitting holes formed in the rotating disk as in the configuration of claim 3. Alternatively, the cylindrical body may be fitted and fixed, and a part of the cylindrical body may be protruded from the rotating disk to form an engaging protrusion. Thereby, the inside of a cylindrical body can arrange | position the workpiece | work accommodation hole and the concentric circular arc surface of the outer side surface of an engaging protrusion on a concentric circle easily. In this case, the engagement contact portion has a substantially U shape including an arc surface having a radius of curvature substantially the same as the concentric arc surface, and a substantially V shape and an L shape which are in contact with two locations of the concentric arc surface. What is necessary is just to set it as the structure provided with the contact surface (invention of Claim 4).

  In the workpiece feeding device according to claim 5, since the engagement contact portion is substantially L-shaped with the origin side in the first direction open, the engagement contact portion is engaged with the engagement protrusion in the first direction. The engagement abutment portion is easily brought into contact with the engagement projection in the second direction after the abutment, and the engagement abutment portion is easily brought into contact with the engagement projection in both the first direction and the second direction. Can be brought into contact with the positioned state.

  According to a sixth aspect of the present invention, there is provided an air actuator for constantly urging the work feeder toward the origin by air pressure as the origin return means. As a result, the work feeder is moved toward the origin as soon as the engagement between the engagement protrusion and the engagement contact portion is released, and the operation time of one cycle of the work feeder can be shortened.

  As in the workpiece feeding apparatus according to claim 7, the first and second support means may include a first guide or a second guide extending linearly in the first direction or the second direction, It is good also as a structure provided with the 1st guide extended in circular arc shape. That is, “the first direction has an arc shape centered on the rotation center of the rotating disk, and the first support means can move the first table to a first guide extending in an arc shape in the first direction. 7. The support according to claim 1, wherein the second support means is movably supported by a second guide fixed to the first table and extending linearly in the radial direction of the rotating disk. It is good also as a workpiece | work feeding apparatus as described in one claim. "

  Since the workpiece grinding machine according to the eighth aspect includes the workpiece feeding device according to any one of the first to seventh aspects, the both ends of the workpiece can be ground at a lower cost and at a higher speed than in the prior art.

The top view of the workpiece grinding machine which concerns on 1st Embodiment of this invention. Side cross-sectional view of rotating table and rotating wheel Side view of work feeder Side cross-sectional view before supplying workpiece from workpiece feeder to workpiece receiving hole Side sectional view immediately after supplying the workpiece from the workpiece feeder to the workpiece receiving hole (A) Side sectional view of the work feeder when the first and second stoppers are disposed at the passage restriction position, (B) The first stopper is disposed at the passage restriction position and the second stopper is disposed at the passage permission position. Sectional view of the work feeder when (A) A plan sectional view of the engagement contact portion and the engagement projection, (B) A plane sectional view of the engagement state of the engagement contact portion and the engagement projection, (C) The engagement contact portion is engaged. Plan sectional view in a state where it has moved by engaging the mating protrusion Block diagram of control system for workpiece feeding device Flow chart of control program (A) Plan sectional view of the engaging contact portion according to another embodiment, (B) Plan sectional view of the engaging contact portion according to another embodiment. (A) Plan sectional view of an engaging contact portion according to another embodiment, (B) Plan sectional view of an engaging projection according to another embodiment.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a workpiece grinding machine 80 according to the present invention. The workpiece grinding machine 80 includes a grinding device 99 as a “predetermined processing device” according to the present invention. In the work grinding apparatus 99, a pair of disk-shaped rotating grindstones 13 and 13 are arranged on the same axis and face each other vertically (see FIG. 2). Then, the workpiece W is passed between the pair of rotating grindstones 13 and 13 in a state where the pair of rotating grindstones 13 and 13 are rotated in the same direction or in the opposite direction, so that both upper and lower ends of the workpiece W Is ground.

  The work grinding machine 80 is provided with a turntable 12 for feeding the work W between the pair of rotary grindstones 13 and 13. As shown in FIG. 1, the turntable 12 has a rotation axis substantially parallel to the rotation axis of the rotating grindstone 13, and a part of the rotating disk 12 is disposed between the pair of rotating whetstones 13, 13. Rotates counterclockwise when viewed from above.

  A plurality of work receiving holes 31 are provided on the outer edge of the turntable 12. Specifically, the main body 12H of the turntable 12 is made of a circular sheet metal, and a plurality of fitting holes 33 (see FIG. 2) vertically penetrate the outer edge of the main body 12H in the circumferential direction. They are arranged at an equal pitch. As shown in FIG. 2, a cylindrical body 34 is press-fitted into each fitting hole 33, and the inside of the cylindrical body 34 is a work accommodating hole 31. Further, the diameter of the upper step portion of the cylindrical body 34 is increased in a stepped shape, and the step surface is in contact with the upper surface of the main body portion 12H. Note that the lower end surface of the cylindrical body 34 and the lower surface of the rotating disk 12 are substantially flush with each other. And the part which protruded upwards from the rotary disk 12 among the cylindrical bodies 34 comprises the engagement protrusion 32 which concerns on this invention, and the outer peripheral surface of the engagement protrusion 32 becomes the concentric circular arc surface 32A which concerns on this invention. Yes.

  The turntable 12 is arranged so that there is a gap between the upper and lower end faces of the cylindrical body 34 and the rotating grindstones 13, 13. Further, a support plate 14 is provided below a portion of the rotating disk 12 positioned outside the pair of rotating grindstones 13 and 13. The support plate 14 has an upper surface that is substantially flush with the upper surface of the lower rotating grindstone 13. Then, in a state where the rotating disk 12 is rotating, the compression coil spring as the work W is sequentially accommodated in the work accommodation hole 31 outside the pair of rotation grindstones 13, 13, and the pair of rotation grindstones 13. , 13 is fed. Further, the support plate 14 is provided with a workpiece collection portion 14A (see FIG. 1) in which a part of the outer edge portion is cut out, and the workpiece is received from the workpiece accommodation hole 31 that has passed between the pair of rotating grindstones 13 and 13. The workpiece W is dropped and collected in the collection unit 14A.

  As shown in FIG. 1, the work grinding machine 80 includes a work feeder 11 that discharges the work W one by one. As shown in FIG. 3, the work feeder 11 has a work supply pipe 27, and the work supply pipe 27 is formed by connecting an extension pipe 27P to an upper end portion of a sleeve 27N extending in the vertical direction. The inner cross-sectional shapes of the sleeve 27N and the extension pipe 27P are both circular, the inner diameter of the extension pipe 27P is slightly larger than the inner diameter of the work accommodating hole 31, and the inner diameter of the sleeve 27N is substantially the same as the inner diameter of the work accommodating hole 31. ing. Further, a portion of the sleeve 27N that communicates with the extension pipe 27P is tapered downward. The extension pipe 27P is highly flexible and can be bent and deformed. A plurality of workpieces W are inserted, for example, manually from the starting end of the extension pipe 27P, move in the extension pipe 27P and the sleeve 27N in a line, and are discharged from the workpiece discharge port 26 at the lower end of the sleeve 27N. The

  First and second stoppers 28 and 29 are provided at the end of the work supply pipe 27. Specifically, the sleeve 27N is fixed in a state of being fitted into a sleeve support hole 70A that vertically penetrates the block-shaped bracket 70. Also, the bracket 70 is provided with a pair of lateral holes 71, 71 that are open on one side surface, and the lateral holes 71, 71 are both in communication with the sleeve 27N. The first air cylinder 28K is attached to the lower lateral hole 71, and the piston of the first air cylinder 28K forms the first stopper 28. Further, as shown in FIG. 8, a compressed air pipe P connected to a compressor 98 such as a factory is connected to the first air cylinder 28K via a valve 28V. Then, by switching the supply of compressed air to the first air cylinder 28K by the valve 28V, the first stopper 28 protrudes into the sleeve 27N and is positioned below the work W as shown in FIG. As shown in FIG. 5, it moves between a passage restriction position that restricts the passage of the workpiece W and a passage permission position that retreats from the sleeve 27N and permits the passage of the workpiece W.

  On the other hand, the second air cylinder 29K is attached to the upper side hole 71, and the piston of the second air cylinder 29K serves as the second stopper 29. Further, as shown in FIG. 8, a compressed air pipe P is also connected to the second air cylinder 29K via a valve 29V. Then, by switching the supply of compressed air to the second air cylinder 29K by the valve 29V, as shown in FIG. 6A, the second stopper 29 slightly protrudes into the sleeve 27N and is pressed against the work W. Then, it moves between a passage restriction position that restricts the passage of the workpiece W and a passage permission position that retreats from the sleeve 27N and allows the passage of the workpiece W, as shown in FIG. 6B.

  The distance between the second stopper 29 and the first stopper 28 is larger than one workpiece W and smaller than two minutes. As a result, as shown in FIG. 4, the second stopper 29 restricts the passage of the second workpiece W from the bottom while the first stopper 28 restricts the passage of the lowermost workpiece W. Then, when the first stopper 28 is moved to the passage allowable position as shown in FIG. 5 from that state, only the lowermost workpiece W is discharged from the workpiece discharge port 26. Thereafter, as shown in FIG. 6 (A), after the first stopper 28 is returned to the passage restriction position, the second stopper 29 is moved to the passage allowable position as shown in FIG. As shown in FIG. 4, the original state is restored by returning the second stopper 29 to the passage restriction position. By repeating such an operation, the workpieces W can be discharged one by one from the workpiece discharge port 26 as described above.

  In the following description, restricting the movement of the workpiece W by the first stopper 28 is appropriately referred to as “the first stopper 28 is turned on”, and the first stopper 28 allows the movement of the workpiece W. As appropriate, “the first stopper 28 is turned off”. The same applies to the second stopper 29.

  As shown in FIG. 4, when the workpiece feeder 11 ejects the workpiece W, if the workpiece accommodation hole 31 is located below the workpiece ejection port 26, the workpiece accommodation hole 31 is accommodated. Therefore, a feeder moving mechanism 81 is provided to move the work feeder 11 so as to follow each work accommodation hole 31 of the rotating turntable 12. The feeder moving mechanism 81, the work feeder 11, and the turntable 12 constitute a work feeding device 10 (see FIG. 1) according to the present invention.

  The feeder moving mechanism 81 includes first and second linear actuators 82 and 83. The first linear motion actuator 82 is disposed at a side position of the rotary disk 12, and the first guide 20 linearly extends in the first direction H1 along the moving direction of the engagement protrusion 32 passing through the vicinity thereof. And a first table 21 engaged with the first guide 20 so as to be linearly movable. On the other hand, the second linear actuator 83 has a second guide 22 extending in a second direction H2 approaching and separating from the side of the engaging protrusion 32 and a second guide 22 engaged with the second guide 22 so as to be linearly movable. And a table 23. The second guide 22 is fixed to the first table 21 of the first linear actuator 82. The first direction H1 and the second direction H2 are substantially orthogonal to each other.

  Hereinafter, in the first linear actuator 82, the end of the movable range of the first table 21 when moved in the same direction as the moving direction of the engaging protrusion 32 is moved to the “end point”, and to the opposite side. The end of time is called the “origin”. Further, in the second linear motion actuator 83, the end when moving toward the engagement protrusion 32 in the movable range of the second table 23 is the “end point”, and the end when moving to the opposite side Is referred to as the “origin”. Further, the operation of the first and second tables 21 and 23 toward the end point is referred to as “forward”, and the operation on the opposite side is referred to as “reverse”.

  As shown in FIG. 8, a compressed air pipe P is connected to the first and second linear actuators 82 and 83 via valves 82V and 83V. During the operation of the workpiece feeding device 10, the valve 82V of the first linear actuator 82 is constantly urged so that the first table 21 is directed toward the origin by being in a constant open state. On the other hand, the valve 83 </ b> V of the second linear actuator 83 is appropriately switched, and thereby the second table 23 is driven so as to approach or separate from the engagement protrusion 32. In these respects, the first linear actuator 82 corresponds to “origin return means” according to the present invention, and the second linear actuator 83 corresponds to “second direction drive means” according to the present invention.

  As shown in FIG. 4, the extension plate 24 is fixed to the second table 23, and is extended in a cantilever shape on the rotating disk 12 side. And the bracket 70 of the work feeder 11 is fixed to the front-end | tip part of the extension plate 24, and the work discharge port 26 of the work feeder 11 is arrange | positioned above the rotating disk 12. FIG. Specifically, as shown in FIG. 3, a first step portion 70 </ b> D is formed on the lower end portion of the bracket 70 on the side away from the sleeve support hole 70 </ b> A. And the front-end | tip part of the extension plate 24 is fixed to the 1st level | step-difference part 70D, the lower surface of the extension plate 24 and the lower surface of the bracket 70 become flush | level, and it arrange | positions in the slightly upper position of the upper surface of the rotating disk 12. ing.

  A second stepped portion 70E is formed on the sleeve support hole 70A side of the lower end portion of the bracket 70. The second stepped portion 70E is formed by cutting a part of the lower end portion of the bracket 70 from the side surface on the rotating disk 12 side to the central axis position of the sleeve support hole 70A. Thus, a protrusion having a semicircular arc surface is formed between the first stepped portion 70D and the second stepped portion 70E in the lower end portion of the bracket 70, as shown in FIG. ing. And the protrusion forms the engagement contact portion 51 according to the present invention and faces the engagement protrusion 32 from the side. Further, the semicircular arc surface of the engagement contact portion 51 forms a concentric arc surface 51A according to the present invention. Since the concentric arc surface 51A extends from the inner surface of the sleeve support hole 70A, the concentric arc surface 51A and the inner surface of the work discharge port 26 form a concentric circle. Further, the concentric arc surface 51A of the engagement contact portion 51 and the concentric arc surface 32A of the engagement protrusion 32 have the same curvature radius. Furthermore, the lateral width (width in the first direction H1) of the engagement contact portion 51 is smaller than the interval S between each engagement projection 32 and the two adjacent engagement projections 32. For this purpose, both side edges of the lower surface of the bracket 70 are cut out in a stepped shape.

  Here, if the center line in the horizontal width direction of the work feeder 11 is L1, the center line L1 extends in the second direction H2 and is orthogonal to the center line of the sleeve 27N. As shown in FIG. 1, when both the first table 21 and the second table 23 are arranged at the origin, the center line L1 of the work feeder 11 is in a state orthogonal to the center axis of the rotating disk 12, and As shown in FIG. 3 and FIG. 7A, the engagement contact portion 51 is disposed slightly outside the rotation locus of the engagement protrusion 32 group. Assuming that the stationary line overlapping the center line L1 at this time is the starting reference line L2, when the center of the workpiece receiving hole 31 is located in the vicinity of the starting reference line L2, the work feeder 11 is moved together with the second table 23 to the second position. When the head is advanced in the direction H2, as shown in FIG. 7B, the concentric arc surface 51A of the engagement contact portion 51 and the concentric arc surface 32A of the engagement protrusion 32 come into contact with each other, and the workpiece accommodation hole 31 and the workpiece The discharge port 26 is arranged on a concentric axis.

  Then, the engagement contact portion 51 receives the rotational power of the turntable 12 from the engagement protrusion 32 by the engagement of the engagement contact portion 51 and the engagement protrusion 32 in the first direction H1, and the work feeder 11 As the engaging projection 32 moves in the first direction H1 component, the workpiece feeder 11 moves forward in the first direction H1 and the second linear motion actuator 83 drives the work feeder 11 in the second direction H2 component in the engaging projection 32. It moves forward in the second direction H2 with the movement. That is, the work feeder 11 moves so as to draw an arc locus following the arc locus of the engaging protrusion 32. During this time, the state in which the workpiece accommodation hole 31 and the workpiece discharge port 26 are arranged on the concentric axis is maintained. Therefore, if the workpiece W is discharged from the workpiece discharge port 26 of the workpiece feeder 11 using this interval, the workpiece accommodation hole 31 can be accommodated.

  Then, before the next workpiece receiving hole 31 reaches the starting reference line L2, if the direction of the operation of the second linear actuator 83 is switched and the workpiece feeder 11 is moved to the origin side in the second direction H2, the engagement contact is achieved. The engagement between the contact portion 51 and the engagement protrusion 32 is released, and the work feeder 11 moves to the origin side also in the first direction H1 by the urging force of the first linear actuator 82, and returns to the original state. In order to automatically and repeatedly perform this series of cycle operations, the workpiece feeding device 10 includes a position sensor 85 that detects the position of the workpiece accommodation hole 31 and valves 28V and 29V based on the detection result of the position sensor 85. , 83V.

  As shown in FIG. 1, the position sensor 85 is supported by the stand 85 </ b> S and is disposed above the turntable 12. Further, an alternative reference line L3 is set so that the starting reference line L2 is shifted by about 5 to 30 degrees to the opposite side of the rotation direction of the turntable 12 and passes through the center of the position sensor 85. Then, when the engagement protrusion 32 passes through the alternative reference line L3, the engagement protrusion 32 shifted by 3 to 4 downstream from the engagement protrusion 32 just passes the start reference line L2. It has become. For example, the position sensor 85 scans the laser beam along the alternative reference line L3, detects the width of the portion of the engagement protrusion 32 that the alternative reference line L3 crosses, and performs control based on the detected width. The part 86 detects the position of the engaging protrusion 32 with respect to the starting reference line L2.

  Specifically, when the width of the portion of the engagement protrusion 32 that the alternative reference line L3 crosses gradually increases, the engagement protrusions 32 on the downstream side of the engagement protrusion 32 are three to four. It is determined that the center of the work accommodation hole 31 that intersects the start reference line L2 and has the engaging protrusion 32 is approaching the start reference line L2. Further, when the width of the portion of the engaging protrusion 32 that is crossed by the alternative reference line L3 is the same as the outer diameter of the engaging protrusion 32, the engaging protrusion 32 is 3-4 downstream of the engaging protrusion 32. It is determined that the center of the work receiving hole 31 having the mating protrusion 32 is located on the starting reference line L2.

  As shown in FIG. 7A, the control unit 86 has a position where the center of the workpiece accommodation hole 31 is slightly shifted upstream with respect to the start reference line L2 (for example, a predetermined value less than the radius of the workpiece accommodation hole 31). The position shifted by the distance) is set as the reference position P1 according to the present invention. Further, as shown in FIG. 7C, the position where the center of the work accommodation hole 31 is shifted downstream from the start reference line L2, for example, about the radius of the engagement protrusion 32 is set as the disengagement position P2. ing. Then, the control unit 86 executes the control program PG1 shown in FIG. 9, and the valves 28V, 29V, and 28V are as follows based on whether or not the workpiece accommodation hole 31 has reached the reference position P1 or the separation position P2. 32V is controlled.

  When the control program PG1 is executed, a workpiece discharge preparation process is performed (S10). For example, the workpiece feeder 11 is disposed at the origin position in both the first and second directions H1 and H2, and the first and second stoppers are provided. Both 28 and 29 are turned on. Then, the process waits until any workpiece accommodation hole 31 reaches the reference position P1 (NO loop of S11), and as shown in FIG. 7A, any workpiece accommodation hole 31 reaches the reference position P1. Then (YES in S11), the valve 83V is switched and the work feeder 11 moves forward in the second direction H2 (S12). Then, as shown in FIG. 7B, the engagement protrusion 32 of the workpiece accommodation hole 31 and the engagement contact of the workpiece feeder 11 are substantially at the timing when the center of the workpiece accommodation hole 31 reaches the start reference line L2. Part 51 engages.

  Then, as described above, the workpiece feeder 11 moves following the workpiece accommodation hole 31, and the state where the workpiece accommodation hole 31 and the workpiece discharge port 26 of the workpiece feeder 11 are arranged coaxially is maintained. In the meantime, the valve 28V is switched, the first stopper 28 is turned off, and one workpiece W is discharged from the workpiece feeder 11 and accommodated in the workpiece accommodation hole 31 (S13). Next, after the valves 28V and 29V are switched and the first stopper 28 is turned on, the second stopper 29 is turned off (S14, S15). Then, as shown in FIG. 7C, when the workpiece accommodation hole 31 reaches the separation position P2 (YES in S16), the valve 83V is switched, and the workpiece feeder 11 moves backward in the second direction H2 (S17). Along with this, the engagement between the workpiece accommodation hole 31 and the engagement contact portion 51 is released, and the workpiece feeder 11 moves backward in the first direction H1. In the meantime, the valve 29V is switched, the second stopper 29 is turned on, and the work feeder 11 returns to the origin in both the first and second directions H1, H2. At this time, the center of the next workpiece accommodation hole 31 is located on the near side of the reference position P1, and when the center of the workpiece accommodation hole 31 reaches the reference position P1, the operations after step S11 described above are repeated.

  In this way, the workpieces W are discharged one by one from the workpiece feeder 11, and the workpieces W are distributed to the workpiece receiving holes 31 and fed between the pair of rotating grindstones 13, 13 to be opposite ends of the workpiece W. Grinding.

  This is the end of the description of the configuration and operation of the workpiece feeding device 10 of the present embodiment. Next, the function and effect of the workpiece feeding device 10 will be described. As described above, in the workpiece feeding device 10 according to the present embodiment, the engagement protrusions 32 protrude from the respective work receiving holes 31 of the turntable 12, and the work feeder 11 moves in the first direction along the movement direction of the engagement protrusions 32. It is supported so as to be able to reciprocate in one direction H1 and in a second direction H2 approaching and separating from the side of the engaging protrusion 32 from the side. Further, the work feeder 11 is provided with an engagement contact portion 51 that is pressed against the engagement protrusion 32 from the side. When the engagement contact portion 51 is pressed against the engagement protrusion 32, the workpiece discharge port 26 of the workpiece feeder 11 is positioned on the same axis as the workpiece receiving hole 31, and the power in the first direction H1 is applied. Received from the abutment 32. Accordingly, the work feeder 11 moves following the work receiving hole 31 only by driving the engagement contact portion 51 of the work feeder 11 so as to press it against the engagement protrusion 32 in the second direction H2, and the workpiece is discharged. The opposing state of the outlet 26 and the work accommodation hole 31 can be maintained. Further, when the engagement contact portion 51 is separated from the engagement protrusion 32 in the second direction H2 and returned to the origin, the workpiece discharge port 26 is caused to follow the same workpiece receiving hole 31 in the same manner. Can do. That is, as a drive source or urging means for moving the work feeder 11, the first linear actuator 82 as the “origin return means” for moving the work feeder 11 to one side in the first direction H1, and the second direction H2. The work discharge port 26 can be made to follow the work receiving hole 31 only by including the second linear motion actuator 83 as the “second direction driving means” that moves to one side and the other side of the work. That is, according to the workpiece feeding device 10 of the present embodiment, the cost can be reduced and the weight can be reduced as compared with the conventional robot, so that high speed operation is possible. Moreover, the contact between the engagement contact portion 51 and the engagement protrusion 32 ensures that the workpiece discharge port 26 and the workpiece accommodation hole 31 are positioned at the positions facing each other. 31 can be accommodated. Thus, according to the workpiece feeding apparatus 10 of the present embodiment, the workpiece can be fed at high speed and reliably at a lower cost than in the past. Moreover, since the workpiece grinding machine 80 of this embodiment is provided with the workpiece feeding apparatus 10, it can grind the workpiece | work W at low cost and high speed conventionally.

[Other Embodiments]
The present invention is not limited to the above-described embodiments. For example, the embodiments described below are also included in the technical scope of the present invention, and various other modifications are possible within the scope not departing from the gist of the present invention. It can be changed and implemented.

  (1) In the embodiment described above, the first direction H1 of the movement direction of the work feeder 11 is linear, but may be curved. In this configuration, the first table 21 is guided by the first guide 20 extending in a curved shape. In the case where the first direction H1 is curved, for example, the first direction H1 may be arcuate around the rotation center of the turntable 12. In these configurations, the second direction H2 may be the radial direction of the turntable 12.

  (2) In the above embodiment, the workpiece W is a coil spring, but is not limited to this, and may be, for example, a rod-shaped one or a cylindrical one.

  (3) In the above embodiment, the workpiece feeding device 10 feeds the workpiece W to the workpiece grinding device 99. However, the workpiece W may be fed to a processing device that performs other processing on the workpiece W. In this case, for example, a processing apparatus that applies a processing liquid to the workpiece W or a processing apparatus that punches holes in the workpiece W may be used.

  (4) In the above embodiment, the part that opens to the rotating disk 12 and accommodates the workpiece W is the workpiece accommodating hole 31 that penetrates the rotating disk 12, but is a recess that does not penetrate the rotating disk 12. Also good.

  (5) In the above embodiment, the second stopper-off process (S15) may be performed simultaneously with step S16 or after step S16.

  (6) In the above-described embodiment, the engagement protrusion 32 has a cylindrical shape, but may include a plurality of protrusions arranged concentrically with the workpiece accommodation hole 31. Thus, the engagement protrusion 32 may protrude from the entire opening edge of the work accommodating hole 31, or may protrude from only a part of the opening edge.

  (7) In the above-described embodiment, the contact surface of the engagement contact portion 51 with the engagement protrusion 32 includes an arcuate surface having a substantially same radius of curvature as the outer peripheral surface of the engagement protrusion 32. It may be in the shape of a letter, may be substantially L-shaped including such an arc surface (see the engagement contact portion 51V in FIG. 10A), or 2 of the engagement protrusion 32. It may be substantially L-shaped (see the engagement contact portion 51W in FIG. 10B) or substantially V-shaped (see the engagement contact portion 51X in FIG. 11A) in contact with the location. Further, as shown in FIGS. 10A and 10B, when the engagement contact portion 51V (51W) has a substantially L shape with the origin side in the first direction open, the first direction H1 Then, the engagement contact portion 51V (51W) is brought into contact with the engagement projection 32, and the engagement contact portion 51V (51W) is brought into contact with the engagement projection 32 in the second direction H2. The engagement contact portion 51V (51W) can be easily brought into contact with the engagement protrusion 32 in a state where the engagement contact portion 51V (51W) is positioned in both the first direction H1 and the second direction H2.

  (8) In the above embodiment, the arc surface is formed on the outer peripheral surface of the engagement protrusion 32, but the concentric arc surface concentric with the work discharge port 26 is formed on the engagement contact portion 51. For example, the arc surface may not be formed on the outer peripheral surface of the engaging protrusion 32, and the engaging protrusion 32 is approximately the same distance as the radius of the concentric arc surface from the central axis of the work receiving hole 31 in the outer peripheral surface. The structure which contacts a concentric circular arc surface in at least two places separated only by the distance may be sufficient. In this case, the outer peripheral surface of the engaging protrusion 32 may have a regular polygonal shape (see FIG. 11B) that is coaxial with the work accommodating hole 31.

DESCRIPTION OF SYMBOLS 10 Work feeding apparatus 11 Work feeder 12 Turntable 26 Work discharge port 31 Support hole 32 Engagement protrusion 80 Work grinding apparatus

Claims (8)

A work feeder that discharges the work one by one;
A turntable provided with a plurality of workpiece accommodation holes arranged in a circle to accommodate the workpieces one by one;
When the work receiving hole passes through a preset reference position with the rotating plate rotating, the work feeder is moved so that the work discharge port of the work feeder faces the work receiving hole. A feeder moving mechanism
In the workpiece feeding device that distributes the plurality of workpieces discharged by the workpiece feeder to the plurality of workpiece receiving holes and feeds them to a predetermined processing device,
In the feeder moving mechanism,
An engagement protrusion protruding from the opening edge of each workpiece accommodating hole;
First support means for supporting the work feeder so as to be capable of reciprocating between an origin and a terminal point in a first direction along the direction of movement of the engagement protrusion;
Origin return means for returning the work feeder to the origin;
Second support means for supporting the work feeder so as to be capable of reciprocating in a second direction approaching and separating from the side of the engaging protrusion;
Second direction driving means for reciprocating the work feeder in the second direction;
The workpiece feeder is provided on the workpiece feeder and pressed from the side by the engagement protrusion by the second direction driving means to position the workpiece discharge port at a position facing the workpiece receiving hole, and in the first direction. A work feeding device provided with an engagement contact portion that receives power directed toward the end point from the engagement protrusion. A concentric arc surface formed on one of the engagement protrusion or the engagement contact portion and forming one concentric circle of the work receiving hole or the work discharge port;
A centering contact portion that is formed on the other of the engagement protrusion or the engagement contact portion, contacts the concentric arc surface, and centers the work receiving hole and the work discharge port; The workpiece feeding apparatus according to claim 1. A cylindrical body is fitted and fixed to a plurality of fitting holes formed in the rotating disk, and the inside of the cylindrical body forms the workpiece accommodation hole,
A part of the cylindrical body protrudes from the rotating disk to form the engaging protrusion,
The workpiece feeding apparatus according to claim 2, wherein an outer side surface of the engaging protrusion is the concentric arc surface.   The engagement contact portion has a substantially U-shape including an arc surface having a radius of curvature substantially the same as the concentric arc surface, and a substantially V-shape and an L-shape in contact with two locations of the concentric arc surface. The workpiece feeding device according to claim 3, further comprising a contact surface.   5. The workpiece feeding device according to claim 1, wherein the engagement contact portion has a substantially L shape in which the origin side in the first direction is open.   The workpiece feeding device according to any one of claims 1 to 5, wherein the origin return means is an air actuator that constantly biases the workpiece feeder toward the origin by air pressure. The first direction is linear,
The first support means movably supports a first table on a first guide extending linearly in the first direction,
The said 2nd support means is fixed to the said 1st table, and is supported so that a movement to the 2nd guide extended linearly in the said 2nd direction so that a movement is possible. Work feeding device. The workpiece feeding device according to any one of claims 1 to 7,
A grinding device as the predetermined processing device having a pair of rotating grindstones facing each other in the vertical direction;
The rotating disk rotates in a state in which a part thereof is disposed between the pair of rotating grindstones,
The workpiece receiving hole penetrates the rotating plate up and down,
A work grinding machine provided with a support plate for supporting the work in the work accommodation hole from below, below the work accommodation hole, outside the pair of rotating grindstones.

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