JP2011225358A - Stud bolt direction correction and automatic supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stud bolt direction correction and automatic supply device which has simple configuration, discriminates a direction of a stud bolt, corrects its direction and supplies the stud bolt.SOLUTION: The stud bolt direction correction and automatic supply device includes: a belt conveyance part 5 which aligns stud bolts in a row and conveys them in their direction uncorrected state, each of the stud bolts having an intermediate non-screw portion 4a, first and second screw portions 4b and 4c; a rotor disposed on the discharge end of the belt conveyance part and having, in its diameter direction, an insertion hole 14 into which one stud bolt 4 is inserted and a suction hole 15 which is branched from a position eccentric from the longitudinal intermediate part of the insertion hole to one side and is sucked at negative pressure; a rotationally driving part for rotationally driving the rotor in a forward and backward direction; and a controller 19 that corrects the direction of the stud bolt 4 by rotating the rotor 12 in a forward or backward direction by the rotationally driving part depending on difference in negative pressure based on which of the non-screw portion 4a and the second screw portion 4c of the stud bolt 4 inserted into the insertion hole 14 is positioned, and that discharges the stud bolt 4 from the insertion hole 14 by its own weight to supply it.

Description

  TECHNICAL FIELD The present invention relates to a stud bolt direction correction automatic supply device that determines the direction of a stud bolt and supplies it while correcting the direction.

  A stud bolt assembling apparatus for assembling a stud bolt with respect to a workpiece is equipped with a stud bolt automatic supply device. And as this stud bolt automatic supply device, for example, a chute is connected to the outlet of a parts feeder that aligns and supplies stud bolts by vibration, and the direction (direction) of the stud bolt is electrically connected to a part of this chute. There is known a direction discriminating unit for discriminating, and a discharge unit for mechanically discharging an abnormal stud bolt in the direction discriminated by the direction discriminating unit between the direction discriminating unit and the parts feeder. (See Patent Document 1).

  A means using a baffle plate is also known as means for discriminating the direction of the stud bolt and ejecting it. It is also conceivable to use an image processing device as means for accurately determining the direction of the stud bolt.

JP-A-5-319548

  However, the conventional stud bolt automatic supply device cannot correct the direction even if the direction is determined, and the stud bolt in a different direction is ejected, so the supply rate of the stud bolt is as low as about 50%. . Moreover, in order to return the stud bolts that have been ejected back to the parts feeder and to realign and supply them, the parts feeder must be constantly operated.

  In particular, the parts feeder has a complicated structure in which stud bolts are supplied while being aligned while being swirled in a spiral manner by vibration, so that the size and cost of the apparatus must be increased. Further, the adjustment of the baffle plate is very difficult, and misidentification and clogging of stud bolts are likely to occur. Further, in the image processing apparatus, although the accuracy of determination is high, the cost is inevitably increased.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stud bolt direction correction automatic supply device that can supply a stud bolt with a simple configuration by determining the direction and correcting the direction. .

  To achieve the above object, the present invention is directed to a stud bolt having a first screw portion formed on one side from an intermediate non-screw portion and a second screw portion formed on the other side and longer than the first screw portion. A belt-type transport unit that transports the unaligned line in a row, and is provided so as to be able to rotate forward and backward facing the unloading end of the belt-type transport unit, and one stud bolt can be inserted in the diameter direction thereof. A rotating body having an insertion hole and a suction hole that is branched to a position eccentric to one side from a longitudinal intermediate portion of the insertion hole and sucked to a negative pressure, and a rotation driving unit capable of rotationally driving the rotating body in forward and reverse directions And rotating the rotating body in the forward direction or in the reverse direction by the rotation driving unit due to a difference in negative pressure depending on whether the non-threaded portion or the second threaded portion of the stud bolt inserted in the insertion hole is located. Correct the direction of the stud bolt It is discharged from the insertion hole of the stud bolt by its own weight while, characterized in that a supply control device.

  A bucket part provided below one side of the belt-type conveyance unit and accommodating a plurality of stud bolts, and provided in the bucket part so as to be movable up and down, and a plurality of stud bolts are pushed up from the bucket part and supplied onto the belt-type conveyance unit. A push-up mechanism is preferably provided.

  Disposed below the rotating body is a discharge passage that communicates with the insertion hole when the insertion hole becomes vertical so that the stud bolt is discharged by the rotation of the rotating body. It is preferable that an injection nozzle for injecting compressed air is disposed in the vertical insertion hole.

  According to the present invention, it is possible to supply a stud bolt with a simple configuration by determining the direction and correcting the direction.

It is a perspective view of a stud bolt direction correction automatic supply device concerning an embodiment of the present invention. It is a side view of the stud bolt direction correction automatic supply device. It is a front view of the stud bolt direction correction automatic supply device. It is a block diagram of the principal part of the same stud bolt direction correction automatic supply apparatus. It is explanatory drawing explaining the effect | action in the principal part. It is a figure which shows a stud bolt assembly apparatus, (a) is a front view, (b) is a side view.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is explained in full detail based on an accompanying drawing.

  As shown in FIGS. 1 to 3, the stud bolt direction correcting automatic supply device 1 has a vertical plate 3 erected on a base plate 2, and a stud bolt 4 on one surface (surface) of the vertical plate 3. Is provided with a belt-type transport unit 5 that aligns and transports the images in an uncorrected direction. The belt-type transport unit 5 includes a driving pulley 7 that is rotationally driven by a motor, for example, an air motor 6, a driven pulley 8 that is disposed at a position that is appropriately separated in the horizontal direction from the driving pulley 7, and the driving pulley 7 It is mainly composed of an endless belt 9 wound around a driven pulley 8.

  Below one side of the belt-type transport unit 5 is provided a bucket portion 10 that accommodates a plurality of, for example, about 200 stud bolts, and below this bucket portion 10 is a plurality of, for example, several tens of studs from within the bucket portion 10. A push-up mechanism 11 is provided that pushes up the bolt and supplies it onto the belt-type transport unit 5. The push-up mechanism 11 includes a push-up plate 11a having an upper portion formed in a mountain shape and an air cylinder 11b that raises and lowers the push-up plate 11a. The upper end portion of the push-up plate 11a is formed with slopes 11c and 11d having a mountain-shaped cross section (inner and outer slopes), and the stud bolt 4 placed on the inner slope 11c on the belt-type transport unit 5 side rises the push-up plate 11a. Accordingly, the stud bolt 4 is pushed up while being supported by the vertical inner wall surface of the bucket portion 10, and when the lower edge of the inner slope 11 c reaches a position higher than the upper surface of the belt-type transport section 5, the stud bolt 4 is moved along the inner slope 11 c. Rolls by its own weight and is supplied to the upper surface of the endless belt 9 of the belt-type transport unit 5.

  Since the endless belt 9 has only a width corresponding to one stud bolt, even if the stud bolts are supplied on the endless belt 9 so as to overlap with each other, an extra stud bolt is generated when the push-up plate 11a is lowered. It falls down into the bucket part 10. On the other hand, the stud bolt placed on the outer slope 11d rolls with its own weight along the outer slope 11d as the push-up plate 11a rises, and falls into the bucket portion 10. The cycle time of the reciprocating motion of the push-up mechanism 11 is appropriately set in accordance with the transport capability of the belt-type transport unit 5. Further, the push-up mechanism 11 may be set to stop driving in accordance with the stop of the belt-type transport unit 5.

  The stud bolt 4 has a non-threaded portion 4a in the middle of its longitudinal direction, a first threaded portion 4b is formed on one side from the non-threaded portion 4a, and the other is longer than the first threaded portion 4b. A second screw portion 4c is formed. That is, the stud bolt 4 used in this embodiment has screw portions 4b and 4c having different lengths at both ends with an intermediate non-screw portion (incomplete screw portion) 4a as a boundary, and these screw portions 4b. , 4c includes a first screw portion 4b having a short length and a second screw portion 4c having a longer length than the first screw portion 4b. Moreover, the outer diameter of the non-screw part 4a is larger than the outer diameter of the screw parts 4b and 4c.

  The vertical plate 3 has a disk-like shape for determining the direction of the stud bolt 4 and correcting the direction of the stud bolt 4 based on the determination of the direction facing the carry-out end of the belt-type transport unit 5. The rotating body 12 is provided so as to be able to rotate forward and reverse. The rotary body 12 is disposed on the front surface side of the vertical plate 3, and a rotary drive unit such as a rotary cylinder 13 is provided on the back surface side of the vertical plate 3 to rotationally drive the rotary body 12 in forward and reverse directions.

  As shown in FIGS. 4 to 5, the rotary body 12 is formed with an insertion hole 14 through which a single stud bolt 4 can be inserted in the diameter direction thereof. A suction hole 15 is formed which is branched upward at a position eccentric from the middle portion in the longitudinal direction to one side (left side in the illustrated example) and sucked or evacuated to a negative pressure. An end 16a of the suction pipe 16 is disposed facing the end of the suction hole 15, and a suction pump 17 is connected to the suction pipe 16 and a pressure sensor 18 for detecting a negative pressure is provided. It has been.

  As shown in FIG. 5 (a) or (b), the non-threaded portion 4a of the stud bolt 4 is positioned in the suction hole 15 after being inserted into the insertion hole 14, or the second threaded portion 4c is positioned. Since the flow resistance of air varies depending on the pressure, a difference in the negative pressure (high negative pressure or low negative pressure) is generated. By detecting this difference in pressure with the pressure sensor 18, the direction of the stud bolt 4 (direction) ) Can be discriminated. The detection value (detection signal) of the pressure sensor 18 is input to the control device 19, and the control device 19 compares the detection value with a preset setting value and the detection value exceeds the setting value (high negative pressure). If it is determined that the rotating body 12 is normal and is rotated 90 degrees counterclockwise (positive) A by the rotary cylinder 13 (see FIG. 5A), and if the detected value falls below the set value (low negative pressure), The rotor 12 is determined to be abnormal and is rotated 90 degrees clockwise (reverse) B [see FIG. 5B].

  As described above, the control device 19 causes the rotating body 12 to vary depending on the negative pressure depending on whether the non-threaded portion 4a of the stud bolt 4 inserted into the insertion hole 14 is positioned in the suction hole 15 or the second threaded portion 4c. Is rotated in the forward or reverse direction by the rotary cylinder 13 to correct the direction of the stud bolt 4, and the stud bolt 4 is discharged from the insertion hole 14 by its own weight and supplied.

  As shown in FIG. 4, the vertical plate 3 is formed with a concave surface portion 20 and a side surface portion 21 that cover a part of the lower surface and the left side surface of the rotating body 12 (the side surface opposite to the belt-type conveyance unit). Yes. The side surface portion 21 has a function as a stopper for positioning and stopping the stud bolt 4 inserted into the insertion hole 14 by the belt type conveyance portion 5. Note that the side surface portion 21 only partially covers the opening end of the insertion hole 14, and therefore does not hinder the air flow during pressure detection.

  The vertical plate 3 is provided with a vertical discharge passage 22 through which the stud bolt 4 is discharged and supplied by its own weight when the insertion hole 14 of the rotating body 12 becomes vertical. On the base plate 2, a receiving portion 23 for receiving the lower end portion of the stud bolt 4 discharged from the discharge passage 22 is provided. Between the receiving portion 23 and the lower end portion of the discharge passage 22, a space 24 is provided in which the stud bolt 4 can be carried out in the horizontal direction, and the base plate 2 has a space 24 on the receiving portion 23. A transport mechanism 25 that grips the stud bolt 4 discharged in the standing state and transports the stud bolt 4 to a workpiece at a predetermined position is provided. As shown in FIGS. 1 to 3, the transport mechanism 25 is provided on a first moving portion 25 a that can move in the longitudinal direction of the base plate 2 and on the first moving portion 25 a, and can move in the width direction of the base plate 2. The second moving part 25b and the gripping part 25c provided on the second moving part 25b and gripping the stud bolt 4 on the receiving part 23 are mainly constituted.

  Above the rotating body 12, when the rotating body 12 rotates to correct the direction of the stud bolt 4 (when the insertion hole 14 becomes vertical), compressed air is injected into the insertion hole 14. An injection nozzle 26 is provided to facilitate the discharge of the stud bolt 4 and to clean the inside of the insertion hole 14, the suction hole 15, and the discharge passage 22.

  A first sensor 27 that detects the presence or absence of the stud bolt 4 is provided at the carry-out end position of the belt-type transport unit 5, and a second sensor that detects the presence or absence of the stud bolt 4 in the insertion hole 14 in the rotating body 12. 28 is provided, and the discharge passage 22 is provided with a third sensor 29 for detecting the presence or absence of the stud bolt 4 in the uppermost step portion. When both the first sensor 27 and the second sensor 28 detect that the stud bolt is present, the control device 19 determines that the stud bolt 4 is completely in the insertion hole 14 and stops driving the belt-type transport unit 5. At the same time, the direction of the stud bolt 4 is determined by making the inside of the suction hole 15 negative, and when the third sensor 29 detects the absence of the stud bolt in the uppermost step portion of the discharge passage 22, the rotating body 12 is detected according to the determination result. Is rotated in a predetermined direction, and after the compressed air is jetted from the jet nozzle 26, the rotary body 12 is set to return to the original position (return position where the insertion hole 14 becomes horizontal).

  As shown in FIG. 1, a notch 30 for assembling the stud bolt 4 is provided at the front end of the base plate 2. FIG. 6 shows a stud bolt assembling device 31, which includes the stud bolt direction correcting automatic supply device 1, a work mounting base 33 capable of moving forward and backward to attach the work 32, and a transport mechanism. A nut runner 34 for rotating the stat bolt 4 transported and attached by 25 to be attached to the workpiece 32 and a governor (template) 35 for positioning the stud bolt 4 are provided.

  According to the stud bolt direction correction automatic supply device 1 having the above configuration, the first screw portion 4b formed on one side from the intermediate non-screw portion 4a and the second screw formed on the other side and longer than the first screw portion 4b. A belt-type transport unit 5 that transports stud bolts 4 having threaded portions 4c aligned in a line in an uncorrected direction, and is provided so as to be able to rotate forward and reverse, facing the unloading end of the belt-type transport unit 5, and its diameter A rotating body 12 having an insertion hole 14 into which one of the stud bolts 4 can be inserted in the direction and a suction hole 15 that is branched at a position eccentric to one side from the longitudinal intermediate portion of the insertion hole 14 and is sucked into negative pressure. A rotary cylinder (rotation drive unit) 13 capable of rotating the rotating body 12 in the forward and reverse directions, and a non-threaded portion 4a of the stud bolt 4 inserted into the insertion hole 14 or a second threaded portion 4c. Depending on where is located Due to the difference in negative pressure, the rotary body 12 is rotated in the forward or reverse direction by the rotary cylinder 13 to correct the direction of the stud bolt 4 and the stat bolt 4 is discharged from the insertion hole 14 by its own weight and supplied. Since the control device 19 is provided, the stud bolt 4 can be supplied after the direction is determined and the direction is corrected with a simple configuration.

  In particular, the rotary cylinder 12 is moved in the positive direction by the rotary cylinder 13 depending on the difference in negative pressure depending on whether the non-threaded portion 4a or the second threaded portion 4c of the stud bolt 4 inserted into the insertion hole 14 is located. Since the direction of the stud bolt 4 is corrected by rotating it in the reverse direction, and the stud bolt 4 is discharged from the insertion hole 14 by its own weight and supplied, it is not necessary for the operator to align the direction of the stud bolt 4. In addition, the stud bolt 4 conveyed by the belt-type conveying unit 5 can be supplied 100% without returning to the bucket unit 10, and the running cost can be reduced.

  Also, a bucket part 10 provided below one side of the belt type conveying part 5 and accommodating a plurality of stud bolts 4, and a plurality of stud bolts 4 are pushed up from the inside of the bucket part 10 and supplied onto the belt type conveying part 5. Unlike the conventional vibration type parts feeder, the structure can be simplified, the size can be reduced, and the cost can be reduced, and the stud bolt 4 can be supplied quickly, smoothly and with low noise. be able to.

  Further, a discharge passage 22 that communicates with the insertion hole 14 when the insertion hole 14 is vertical is arranged below the rotary body 12 to discharge the stud bolt 4 by the rotation of the rotary body 12. In addition, since the injection nozzle 26 for injecting compressed air is disposed in the insertion hole 14 which is vertical above the rotating body 12, the discharge and supply of the stud bolt 4 from the insertion hole 14 is promoted. In addition, the inside of the insertion hole 14, the suction hole 15, and the discharge passage 22 can be cleaned with compressed air, and the reliability can be improved.

  Further, a first sensor 27 for detecting the presence or absence of the stud bolt 4 at the carry-out end position is provided at the carry-out end position of the belt-type transport unit 5, and the rotating body 12 is provided with or without the stud bolt 4 in the insertion hole 14. When the first sensor 27 and the second sensor 28 both detect the presence of the stud bolt, it is determined that the stud bolt 4 is completely in the insertion hole 14, and the belt type conveyance is performed. Since the driving of the part 5 is stopped, the stud bolt 4 can be easily and surely pushed into the insertion hole 14 of the rotating body 12 by the pushing method by the belt type conveying part 5 and the belt type conveying. By stopping the driving of the portion 5, it is possible to prevent the endless belt 9 from idling and wearing with the stud bolt 4 mounted thereon, and to improve durability.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the gist of the present invention. .

DESCRIPTION OF SYMBOLS 1 Stud bolt direction correction automatic supply apparatus 4 Stud bolt 4a Non-screw part 4b 1st screw part 4c 2nd screw part 5 Belt type conveyance part 10 Bucket part 11 Push-up mechanism 12 Rotating body 13 Rotary cylinder (rotation drive part)
14 Insertion hole 15 Suction hole 19 Control device 22 Discharge passage 26 Injection nozzle

Claims (3)

  A belt for conveying a stud bolt having a first screw portion formed on one side from an intermediate non-threaded portion and a second screw portion formed on the other side and longer than the first screw portion in a line aligned in an uncorrected direction. From the insertion hole which can be inserted into the diameter direction of the one stud bolt and a longitudinally intermediate portion of the insertion hole. A rotating body having a suction hole that is branched at a position eccentric to one side and sucked to a negative pressure, a rotation drive unit that can rotationally drive the rotating body in forward and reverse directions, and a stud bolt inserted into the insertion hole. According to the difference in negative pressure depending on whether the non-screw part or the second screw part is located, the rotating body is rotated in the forward direction or the reverse direction by the rotational drive part to correct the direction of the stud bolt and the stat bolt With the dead weight Stud bolt direction correcting automatic feeding apparatus characterized by comprising a control device for supplying was drained from the hole.   A bucket part provided below one side of the belt-type conveyance unit and accommodating a plurality of stud bolts, and provided in the bucket part so as to be movable up and down, and a plurality of stud bolts are pushed up from the bucket part and supplied onto the belt-type conveyance unit. The stud bolt direction correction automatic supply device according to claim 1, further comprising a push-up mechanism.   Disposed below the rotating body is a discharge passage that communicates with the insertion hole when the insertion hole becomes vertical so that the stud bolt is discharged by the rotation of the rotating body. 3. An automatic supply device for correcting stud bolt direction according to claim 1 or 2, further comprising an injection nozzle for injecting compressed air into the insertion hole which is vertical.

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