JP2015016924A - Separation feeder for head-provided bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separation feeder for a head-provided bar which can supply screws stably.SOLUTION: A separator feeder for a head-provided bar includes a hopper part 3 capable of storing a large number of head-provided bars, a separation plate 9 which is provided freely rotatably in the bottom part of the hopper part 3 so as to be inclined at a specified angle to the horizontal direction and arranged, in the outer peripheral part, with a plurality of through holes 9b engageable with head-provided bars, a stepping motor 14 which can transmit rotation to the separation plate 9 and an air suction part which sucks air from the through holes 9b of the separate plate. The motor 14 is driven so as to rotate the separation plate 9 forward or reversely at a specified pitch when a screw is taken out from a through hole 9b at the screw take-out position. The air suction part is so configured as to continue air suction from the through holes 9b until a hopper-part-side opening of the through hole 9b is directed at least to the horizontal direction.

Description

  The present invention relates to an apparatus for separating and supplying a headed bar material for separately supplying a headed bar material such as a micro screw, which is difficult to feed air using a feed hose.

  Conventionally, when supplying a bar with a head such as a screw to a working device such as an automatic screw tightener, the feeder and the working device are connected with a feeding hose, and the feeding hose is used to separate and supply the feeder. A method has been adopted in which compressed screws are fed with compressed air. However, air feeding is very difficult for rods with short heads whose leg length is shorter than the head diameter and rods with minute heads such as micro screws used in precision devices such as portable devices and cameras. Therefore, in view of this, a headed bar separation and supply device (hereinafter simply referred to as a separation and supply device) disclosed in Patent Document 1 has been provided. Hereinafter, a conventional separation supply apparatus will be described with reference to FIG.

  The separation and supply device includes a hopper capable of storing a large number of micro screws (hereinafter simply referred to as screws), which is an example of a headed bar, and is provided in the hopper so as to be rotatable at a predetermined angle with respect to the horizontal and has an outer peripheral portion. A separation plate in which a plurality of through holes into which the screws can be fitted are arranged, an air suction part for sucking air from the through holes of the separation plate and sucking the screws into the through holes, and the separation plate A rotation drive source that rotates and a detection sensor that detects the presence or absence of a screw fitted in the through hole (corresponding to a take-out position for taking out the screw) that is a predetermined position are provided. The air suction part includes a communication hole 100c that communicates the through hole of the separation plate at the take-out position, a communication groove 100b that is formed in an arc shape at a position corresponding to a lower portion of the separation plate, and the communication groove. A ring plate 100 having a communication hole 100a communicating with 100b, and the ring plate 100 is fixed so as not to rotate at a predetermined position. The communication hole 100a and the communication hole 100c are connected to an air suction device (not shown), and the communication hole 100c is arranged at the 12 o'clock position with the rotating surface of the separation plate as a clock face. The groove 100b is arranged at a position from about 5 o'clock to 8 o'clock. In other words, the suction of the screw is performed in the through hole at the position from 5 o'clock to 8 o'clock and 12 o'clock, and the suction of the screw in the hopper is performed in the through hole communicating with the communication groove 100b. Done. Further, the screw sucked into the through hole communicating with the communication groove 100b is moved to the take-out position (the above-mentioned 12 o'clock position) by the clockwise rotation of the separation plate (the direction of the arrow Y1 in FIG. 7). And the like are taken out by a screwing machine (not shown) and screwed into the workpiece.

JP 2002-087581 A

  However, in the conventional separation and supply apparatus, there is an opportunity to suck and hold the headed bar only while the through hole is at the position from 5 o'clock to 8 o'clock as the separation plate rotates, The probability of being sucked and held in the through hole was low. In addition, the headed bar fitted into the through hole can be securely sucked and held by air until the 8 o'clock position of the separation plate, but air is not sucked from the through hole thereafter. After that, when the through hole is in a state facing the bottom side of the hopper, the headed bar fitted into the through hole may fall off. For these reasons, in the conventional separating and supplying apparatus, the headed bar is often not fitted and held in the through hole that has reached the takeout position, and the headed bar is stably supplied to the takeout position. The problem of being unable to do so occurred.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a headed bar separating and supplying apparatus capable of stably supplying a headed bar. In order to achieve this object, the present invention provides a hopper that can store a large number of headed bars, and a bottom bar of the hopper that is rotatably provided at a predetermined angle with respect to the horizontal, and has a headed bar on the outer peripheral portion. A head including a separation plate in which a plurality of through-holes that can be fitted to each other are arranged, a rotational drive source that can rotationally drive the separation plate, and an air suction unit that sucks air from the through-holes of the separation plate In the attached bar separation and supply device, the rotational drive source is driven to alternately perform forward rotation and reverse rotation of the separation plate at a predetermined timing. The air suction portion preferably includes a communication groove that continues air suction from the through hole until at least the hopper portion side opening of the through hole faces in the horizontal direction as the separation plate rotates. The communication groove preferably has a shape that allows air to be sucked from a plurality of through holes including a through hole in which the hopper portion side opening is in a horizontal direction.

  Further, the present invention provides a hopper portion that can store a large number of headed bars, and is provided at the bottom of the hopper so as to be inclined at a predetermined angle from the horizontal, and can be fitted with a headed bar on the outer peripheral portion. Separation of a bar with a head comprising a separation plate in which a plurality of through holes are equally divided, a rotation drive source capable of rotationally driving the separation plate, and an air suction part for sucking air from the through holes of the separation plate In the supply device, the air suction part includes a communication groove that continues air suction from the through hole until at least the hopper part side opening of the through hole faces the horizontal direction as the separation plate rotates. It is characterized by. In this case, it is desirable that the communication groove has a shape that allows air to be sucked from a plurality of through holes including a through hole in which the hopper portion side opening is located in the horizontal direction.

  The separation and supply device for a headed bar according to the present invention makes it possible to agitate the headed bar stored in the hopper by performing a retry operation, whereby the headed bar is sucked and held in the through hole. The probability of being done can be increased. In addition, since it has a communication groove that continues air suction until the axis of the through hole becomes horizontal with the rotation of the separation plate, the hopper part opening of the through hole faces from the downward direction to the horizontal state The air suction from the through hole can be continued until the headed bar fitted into the through hole falls off. As a result, according to the headed bar separation and supply device of the present invention, there is an advantage that the headed bar can be stably supplied to the take-out position.

It is a top view of the separation supply apparatus of the bar with a head concerning the present invention. It is the sectional view on the AA line of FIG. FIG. 3 is an enlarged view of the vicinity of the separation plate when viewed from a direction indicated by an arrow Z1 in FIG. 2 (a direction facing the separation plate). It is a principal part enlarged view of the state which removed the separation plate of FIG. It is a principal part enlarged view which concerns on other embodiment of this invention. It is a principal part enlarged view which concerns on other embodiment of this invention. It is a principal part enlarged view of the state which removed the separation plate of the separation supply apparatus of the conventional headed rod.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6, reference numeral 1 denotes a headed bar separation and supply device (hereinafter referred to as a separation supply device 1), which is a micro screw (not shown) that is an example of a headed bar that is difficult to supply with air. ) Can be stored. The hopper portion 3 includes a pedestal portion 5 attached to the base 4 and a bucket portion 6 attached to the pedestal portion 5 at a predetermined angle. The upper opening end surface of the bucket portion 6 is formed so as to be a horizontal surface 6a and a vertical surface 6b, thereby increasing the area of the opening portion for easy insertion of screws, and the inside of the bucket portion 6 being easily visible. It is.

  A main shaft 8 rotatably supported by a bearing portion 7 is inserted into the pedestal portion 5 of the hopper portion 3, and one end of the main shaft 8 corresponds to the upper surface side of the pedestal portion 5, that is, the bottom portion of the hopper portion 3. The separation plates 9 arranged at the positions are connected to rotate integrally. A resin-made ring plate 10 is interposed between the separation plate 9 and the pedestal portion 5 in order to improve confidentiality of air suction described later. Further, the separation plate 9 and the main shaft 8 are connected by a butterfly bolt T so that the separation plate 9 can be easily removed and replaced.

  The separation plate 9 has a disk shape in which a chamfered portion 9a is provided at a circumferential portion, and the chamfered portion 9a extends in a direction perpendicular to the chamfered portion 9a and passes through the separation plate 9. A plurality of through-holes 9b and stirring recesses 9c (hereinafter simply referred to as recesses 9c) are alternately arranged on the same line at a predetermined pitch around the rotation center of the separation plate 9, that is, around the axis of the main shaft 8. Has been. The through hole 9b has a diameter through which a screw leg portion (thread portion) can be inserted and the head portion cannot enter. When the through plate 9b moves to the highest position as the separation plate 9 rotates, the through hole 9b. It comes to face. That is, the angle of the chamfered portion 9a is set as such. In the separation and supply apparatus 1, the highest position of the separation plate 9 is set as a screw removal position. Moreover, as shown in FIG. 3, the said recessed part 9c ... is comprised in the curved surface shape the head which protrudes on the chamfering part 9a.

  A suction hole 5a to which a suction hose (not shown) extending from the air suction device 12 can be connected is formed at a position corresponding to the lowest position of the separation plate 9 in the pedestal portion 5, and this suction hole 5a is The ring plate 10 communicates with a communication hole 10a provided on the lower surface side. Further, the ring plate 10 is formed with an arc-shaped communication groove 10b that communicates with the communication hole 10a and opens to the separation plate 9 side. As shown in FIG. 4, the communication groove 10b has an arc shape that communicates with a plurality of through holes 9b that are located in the range from 3 o'clock to 9 o'clock when the rotation surface of the separation plate 9 is viewed as a clock face. Is formed. Thereby, when air suction is performed by the operation of the air suction device 12, it is possible to suck air from the plurality of through holes 9b... Communicating with the communication groove 10b all at once. As described above, the mounting angle of the separation plate 9 of the separation supply device 1 and the drilling angle of the through hole 9b with respect to the separation plate 9 are surely determined so that the opening on the hopper 3 side of the through hole 9b is within the range of 3 to 9 o'clock. Designed to face horizontally. For this reason, by setting it as the shape of the above-mentioned communication groove | channel 10b, air is reliably attracted | sucked from several through-holes 9b ... in which the hopper part 3 side opening is in the state which faced the downward direction or the horizontal at least. It will be. In the separation and supply device 1, the suction hole 5 a, the communication hole 10 a, the communication groove 10 b, the suction hose, the air suction device 12, and the like constitute the air suction unit described in the claims.

  A suction hole 5b to which a suction hose (not shown) extending from the air suction device 11 is connected is formed at a screw take-out position corresponding to the highest position of the separation plate 9 in the pedestal portion 5, and the ring plate 10 is formed with a communication hole 10c that allows the through hole 9b at the take-out position to communicate with the suction hole 5b. Further, a vacuum switch 13 is arranged on the suction hose connected to the suction hole 5b, and reaches from the through hole 9b of the separation plate 9 to the vacuum switch 13 via the communication hole 10c, the suction hole 5b, and the suction hose. It is configured to detect a pressure change in the air suction path and to confirm the air transmission state.

  On the other hand, a stepping motor 14 (hereinafter simply referred to as a motor 14), which is an example of a rotational drive source, is attached to the lower surface side of the pedestal portion 5, and the drive shaft 14a of the motor 14 includes the main shaft 8 and the like. The ends are connected so as to be rotatable together. With this configuration, when the motor 14 is driven, the drive shaft 14a, the main shaft 8, and the separation plate 9 rotate integrally. Further, the motor 14 includes an encoder 14b, and is configured such that the rotation angle of the drive shaft 14a or the separation plate 9 can be determined by a signal of the encoder 14b.

Next, the operation of the separation and supply apparatus 1 will be described.
When a start switch (not shown) is turned on with a large number of screws stored in the hopper 3, the motor 14 is driven to rotate the separation plate 9 in the direction of the arrow Y1 in FIG. 3 (hereinafter, the rotation in this direction is assumed to be normal rotation). The rotation in the opposite direction is referred to as reverse rotation), and the air suction devices 11 and 12 are operated to start air suction from the suction holes 5a and 5b, respectively. With this air suction, air suction is started from the through hole 9b communicating with the communication groove 10b and the communication hole 10c. As a result, the screw stored in the hopper 3 is agitated by the action of the recess 9c of the separation plate 9, and the screw in the vicinity of the through hole 9b communicating with the communication groove 10b is fitted into the through hole 9b and sucked and held. . At this time, air suction through the communication groove 10b is performed in the through holes 9b... Located in the range from 3 o'clock to 9 o'clock, so that the suction force is extensively applied to the screw group stored in the hopper 3. It becomes possible to increase the fitting / suction retention rate of the screw into the through hole 9b. Of the through-holes 9b that move with the forward rotation of the separation plate 9, air is sucked from the through-holes 9b in which the opening on the hopper 3 side faces downward or horizontally. The fitted screw can be reliably sucked and held until it becomes a horizontal posture. Thereby, generation | occurrence | production of the malfunction which a screw | thread falls out from the through-hole 9b can be prevented.

  Based on the detection signal of the encoder 14b, the motor 14 performs intermittent forward rotation so that the separation plate 9 is forwardly rotated intermittently for each pitch of the through holes 9b. Thereby, each through-hole 9b of the separation plate 9 is temporarily stopped at the taking-out position sequentially. When a screw is fitted and held in the through hole 9b that has reached the take-out position in this way, the through hole 9b is blocked by the screw, so that the pressure in the path leading to this increases, and thus the vacuum switch 13 turns on. In response to this, the operation of the air suction device 11 is stopped, air suction from the through hole 9b at the take-out position is stopped, and intermittent forward rotation driving of the motor 14 is also temporarily stopped. At this time, the air suction device 12 continues to operate, and continues to suck air from the through hole 9b communicating with the communication groove 10b. For this reason, while the rotation of the separation plate 9 is stopped, it is possible to keep sucking and holding the screw fitted in the through hole 9b... At the position from 3 o'clock to 9 o'clock without dropping. . When no screw is held in the through hole 9b that has reached the take-out position, the pressure of the air suction path that leads to the through hole 9b does not increase, so the vacuum switch 13 does not turn on. For this reason, the motor 14 continues intermittent forward rotation and moves the next through hole 9b to the take-out position.

  When a screw is fitted in the through hole 9b at the take-out position, when the screw is taken out from the through hole 9b, a sensor 15 such as a photoelectric sensor or a proximity sensor detects this. The separation supply apparatus 1 executes a retry operation in response to the screw removal detection signal of the sensor 15. In the retry operation, first, the motor 14 is driven forward to rotate the separation plate 9 forward by one pitch of the through hole 9b, and then the motor 14 is driven to rotate backward to rotate the separation plate 9 by one pitch of the through hole 9b. This is the action to be performed. This retrying operation is repeated a predetermined number of times, whereby the screw group of the hopper 3 is agitated, and the screw is inserted into the through hole 9b that is in a position communicating with the communication groove 10b and not yet fitted with the screw. It becomes possible to make it fit. Since the air suction device 12 continues to operate even during the retry operation, the screw fitted into the through hole 9b by the retry operation is reliably sucked and held in the through hole 9b. After performing this retry operation, the air suction device 11 is actuated again, air suction at the take-out position is resumed, and intermittent forward rotation driving of the motor 14 is resumed. Continue to supply and separate screws stored in

  In the above embodiment, the communication groove 10b has a shape communicating with the through hole 9b located in the range from 3 o'clock to 9 o'clock, but this is the hopper portion 3 of the through hole 9b of the separation and supply device 1. This is because the side opening is surely oriented in the horizontal direction within the range. The position where the opening on the hopper part side of the through hole faces in the horizontal direction changes depending on the mounting angle of the separation plate itself and the drilling angle of the through hole with respect to the separation plate. It may be determined in consideration of that. Further, when the motor 14 is used while being intermittently rotated forward as described above, the screw group stored in the hopper 3 is biased in the rotation direction of the separation plate 9 due to friction caused by the rotation of the separation plate 9. Therefore, the communication groove 10b may have a shape that covers the range from 6 o'clock to 9 o'clock as shown in FIG. In addition, the separation and supply device 1 can be used by rotating the motor 14 intermittently and reversely so that the separation plate 9 can be reversed in the direction of the arrow Y2 in FIG. 6, but in this case, the screw in the hopper 3 is used. Since the group is biased in the direction opposite to that during forward rotation, as shown in FIG. 6, the communication groove 10b may have a shape that covers the range from 6 o'clock to 3 o'clock.

  In the retry operation, the separation plate 9 may be reversely rotated by one pitch of the through hole 9b first, and then the separation plate 9 may be rotated forward by one pitch of the through hole 9b. In this way, when the separation and supply apparatus 1 is used with the motor 14 driven intermittently in the normal direction, the through hole 9b that has already passed the 9 o'clock position can be temporarily returned to the range up to 9 o'clock. Become. For this reason, when the screw is not fitted in the through hole 9b, the screw can be fitted here. In the retry operation, the separation plate 9 is rotated forward and backward by one pitch of the through-hole 9b. However, the separation plate 9 performs forward / reverse rotation at a predetermined pitch, such as forward / reverse rotation for a predetermined time. Just do it. In addition, although an example in which the retry operation is performed a preset number of times has been introduced, the retry operation is a post-process of the separation and supply device 1, that is, a screw tightening step in which a screw taken out from the separation and supply device 1 is tightened to the workpiece. It can also be done according to the working time. For example, if the work time of the screw tightening process is 5 seconds per time, this 5 seconds is set in advance as the retry setting time, and the retry operation is repeated in the same manner as described above until the retry setting time elapses. Also good.

  Furthermore, in the embodiment of the present invention, an example in which a micro screw is separated and supplied has been described. However, the separation and supply device according to the present invention includes various headed bars such as rivets other than screws, headed pins, and nails. Even when separate supply of headed bars other than these screws is performed, the same effect can be obtained.

DESCRIPTION OF SYMBOLS 1 Separating and supplying apparatus of bar material 3 Hopper part 5 Base part 5a Suction hole 5b Suction hole 6 Bucket part 9 Separation plate 9b Through hole 9c Recess 10 Ring plate 10a Communication hole 10b Communication groove 10c Communication hole 11 Air suction device 12 Air Suction device 13 Vacuum switch 14 Stepping motor

Claims (5)

A hopper that can store a large number of headed bars, and a plurality of through-holes that are provided at the bottom of the hopper so as to be inclined at a predetermined angle from the horizontal and that can be rotatably fitted to the outer periphery. A separation and supply device for a bar with a head, comprising: a separation plate arranged in a divided manner; a rotation drive source capable of rotating the separation plate; and an air suction part for sucking air from a through hole of the separation plate. ,
The rotary drive source drives to separate and rotate the separation plate alternately at a predetermined timing.   The air suction portion includes a communication groove that continues air suction from the through hole until at least a hopper portion opening of the through hole faces in a horizontal direction as the separation plate rotates. Separating and supplying apparatus for headed bar as described in 1.   3. The headed bar according to claim 2, wherein the communication groove has a shape that allows air to be sucked from a plurality of through holes including a through hole in which a hopper portion side opening is located in a horizontal direction. Separation feeder. A hopper that can store a large number of headed bars, and a plurality of through-holes that are provided at the bottom of the hopper so as to be inclined at a predetermined angle from the horizontal and that can be rotatably fitted to the outer periphery. A separation and supply device for a bar with a head, comprising: a separation plate arranged in a divided manner; a rotation drive source capable of rotating the separation plate; and an air suction part for sucking air from a through hole of the separation plate. ,
The air suction part is provided with a communication groove that continues air suction from the through hole until at least the opening on the hopper part side of the through hole faces in the horizontal direction as the separation plate rotates. Separating and supplying equipment for bar materials.   5. The headed bar according to claim 4, wherein the communication groove has a shape that allows air to be sucked from a plurality of through holes including a through hole in which a hopper portion side opening is positioned in a horizontal direction. Separation feeder.

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