JP2006027816A - Headed bar separating and supplying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headed bar separating and supplying device capable of coping with various kinds of separating plates. <P>SOLUTION: The headed bar separating and supplying device has a hopper part 3 capable of storing multiple headed bars, and the separating plate 9b, which is formed with a plurality of support holes 9b with an equal interval to be fitted to the headed bar in the peripheral part thereof, is arranged in the bottom part of the hopper part 3 freely to be exchanged. The separating plate 9 is intermittently rotated by drive of a stepping motor 13. In a control unit 19 for controlling drive of the motor 13, intermittent rotation parameter is set for each of a plurality of channels, and the control unit 19 controls drive of the motor 13 on the basis of the intermittent rotation parameter set for the selected channel among the plurality of channels. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for separating and supplying a headed bar material that sucks and holds a headed bar material such as a screw or a rivet in a support hole provided in a peripheral edge of the separation plate and supplies the headed bar material to a predetermined position by rotation of the separation plate. .

  Conventionally, the thing of patent document 1 is known as an isolation | separation supply apparatus of a bar with a head. This separation supply device is configured to provide a separation plate inclined at a predetermined angle from the horizontal in a hopper portion that accommodates a large number of headed bars such as screws, and the separation plate is rotated by being driven by a stepping motor. is doing. Further, a plurality of through holes are formed in the outer periphery of the separation plate, and air is sucked from a part of the through holes by an air suction portion. By this air suction, the headed bar housed in the hopper is sucked and held in the through hole, and is carried to the component supply position with the rotation of the separation plate. Immediately before this component supply position, a sensor is provided to check whether the headed bar is supported in the through hole, and if this sensor detects that the headed bar is supported, In response to this, the stepping motor is driven by several pulses and stopped, and the through hole is stopped at the component supply position.

Japanese Patent Laid-Open No. 5-58433

  In the separation and supply apparatus disclosed in Patent Document 1, a sensor detects whether or not the headed bar is supported in the through-hole immediately before the component supply position of the headed bar, and the stepping motor receives the signal of this sensor. Is driven for several pulses to stop the through hole at the component supply position. For this reason, for example, if the headed bar material to be supplied separately is changed and it is necessary to replace the separation plate with a different support hole pitch, the distance from the center of the separation plate to the center of the through hole (through If the radius of the hole arrangement circle does not change, this can be accommodated. However, when the radius of the array circle of the through holes changes due to the replacement of the separation plate, there has been a problem that the support holes cannot be stopped accurately at the component supply position.

  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 separation and supply device that can be used for various separation plates. In order to achieve this object, the present invention provides a hopper portion that can store a large number of headed bar members, a bottom portion of the hopper portion that is rotatably provided at a predetermined angle from the horizontal, and a headed bar on an outer peripheral portion. A separation and supply device for a bar with a head having a separation plate in which a plurality of support holes into which a material can be fitted is arranged, and an intermittent rotation driving means for intermittently rotating the separation plate for each pitch of the support holes. The separation plate is detachably disposed, and has a plurality of channels each capable of setting intermittent rotation pitch parameters of the intermittent rotation driving means, and is set to a channel selected from the plurality of channels. And a control unit for controlling the intermittent rotation driving means based on the intermittent rotation pitch parameter.

  According to the separation and supply apparatus for headed bar of the present invention, intermittent rotation parameters corresponding to various separation plates can be set in advance in a plurality of channels of the control unit. For this reason, when the separation plate is replaced, switching to a channel in which the corresponding intermittent rotation parameter is set allows the drive of the intermittent rotation drive means to be handled very quickly and easily, and the support hole of the separation plate is set. There are advantages such as being able to stop at the take-out position accurately.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
In FIG. 1 to FIG. 6, reference numeral 1 denotes a headed bar separating and supplying apparatus (hereinafter referred to as “separating and supplying apparatus 1”). The hopper part 3 which can be stored is provided. The hopper portion 3 includes a pedestal 5 attached to the base 4 and a cylindrical bucket portion 6 attached to the pedestal 5 at a predetermined angle.

  A disc-shaped separation plate 9 connected to intermittent rotation driving means 8 is disposed on a base 5 that forms the bottom of the hopper portion 3. A resin-made ring plate 10 is interposed between the separation plate 9 and the pedestal 5 in order to enhance confidentiality during air suction, which will be described later.

  As shown in FIG. 4, the separation plate 9 has a disk shape with a chamfered portion 9a on the outer peripheral portion. The chamfered portion 9a extends in a direction orthogonal to the chamfered portion 9a and extends to the separation plate 9a. As shown in FIG. 5, a plurality of agitation pins 9c placed so as to project the spherical head on the chamfered portion 9a are alternately arranged at equal intervals at a predetermined pitch. ing. This support hole 9b has a diameter through which a screw leg (thread) can be inserted and the head cannot enter, and is oriented vertically when moved to the highest position as the separation plate 9 rotates. It is like that. 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 to the component supply position of the screw 2. Further, a detection object 11a such as a permanent magnet or a reflection plate is attached to a predetermined position on the outer periphery of the separation plate 9, and a sensor or the like capable of detecting the detection object 11a is detected at a predetermined position of the bucket portion 6. Means 11b is arranged. The detection means 11b and the detection object 11a are arranged so that the detection object 11a is detected by the detection means 11b when the predetermined support hole 9b of the separation plate 9 is in the component supply position.

  A suction hole 5a connected to the air suction unit V is formed at a position corresponding to the vicinity of the lowest position of the separation plate 9 of the pedestal 5, and the ring plate 10 communicates with the suction hole 5a. An arc-shaped communication hole 10a is formed. Further, a suction hole 5b connected to the air suction unit V is formed at a position corresponding to the component supply position (highest position) of the separation plate 9 in the pedestal 5, and the ring plate 10 has a component. A communication hole 10b for communicating the support hole 9b at the supply position and the suction hole 5b is formed. Further, a pressure switch 12 is provided on a pipe line connecting the suction hole 5b and the air suction unit V, and is configured to detect a pressure change in the air suction path through the suction hole 5b.

  On the other hand, the intermittent rotation drive means 8 is provided with a stepping motor 13 (hereinafter simply referred to as a motor 13), a toothed pulley 14 integrally connected to a drive shaft 13a of the motor 13, and the separation plate 9. A main shaft 15, a toothed pulley 16 integrally connected to the main shaft 15, and an endless belt 17 (hereinafter simply referred to as a belt 17) wound around the toothed pulley 16 and the toothed pulley 14. Consists of. The main shaft 15 and the separation plate 9 are fastened with butterfly bolts 18 with the center of the separation plate 9 aligned with the center of the main shaft 15. Therefore, if the butterfly bolt 18 is removed, it can be easily replaced with another separation plate 9.

  The motor 13 is driven and controlled by a control unit 19. The control unit 19 includes a control unit 20, a motor drive unit 21 that controls the motor 13 in response to a signal from the control unit 20, a storage unit 22 that stores a control program and various parameters, various switches, and the like. An operation unit 23 is provided, a display unit 24 capable of displaying various information, and an input / output unit 25 for controlling the air suction unit V and the like. The storage unit 22 in the control unit 19 is provided with a table capable of setting a plurality of intermittent rotation parameters. This table has a structure in which intermittent rotation parameters can be registered corresponding to channel numbers.

Next, the operation of the separation supply apparatus 1 will be described.
First, the operation unit 23 is operated in advance, and a channel number in which an intermittent rotation parameter corresponding to the separation plate 9 attached to the separation supply device 1 is set is selected. In response to this, the control unit 20 reads the intermittent rotation parameter set for the channel number, and calculates the number of pulses of the pulse current applied to the motor 13 and its frequency.

  When a start switch (not shown) of the operation unit 23 is pressed, the control unit 19 gives an operation command signal to the input / output unit 20. As a result, the air suction unit V operates, and air is sucked from the suction holes 5a and 5b, respectively. Due to air suction from the suction hole 5a, the screw 2 stored in the hopper 3 is sucked and held in several support holes 9b communicating with the communication hole 10a as shown in FIG. Further, whether or not the screw 2 is supported by the support hole 9b at the component supply position can be confirmed by the pressure switch 12 by air suction from the suction hole 5b. That is, when the screw 2 is present in the support hole 9b, the pressure in the path from the suction hole 5b to the pressure switch 12 increases, so the pressure switch 12 is turned on.

  Further, the control unit 20 sends a pulse train of the number of pulses and the frequency calculated from the intermittent rotation parameter to the motor drive unit 21 when the above-described start switch is pressed. The motor drive unit 21 drives the motor 13 by passing a pulse current corresponding to the pulse train to the motor 13. When the motor 13 is driven in this way, rotation is transmitted to the separation plate 9 through the toothed pulleys 14 and 16, the belt 17 and the main shaft 15, and the separation plate 9 rotates by one pitch of the support holes 9b. In order to confirm this, the control unit 20 counts the number of output pulses of the encoder 13b of the motor 13 in parallel with the pulse train transmission, and confirms whether this reaches a predetermined number within a predetermined time.

  When the control unit 20 confirms that the separation plate 9 is rotated by one pitch of the support holes 9b..., The control unit 20 confirms the signal of the pressure switch 12 obtained from the input / output unit 25. The pulse train is sent to the motor drive unit 21. Thereby, when the screw 2 is not supported by the support hole 9b at the component supply position, the separation plate 9 further rotates by one pitch of the support holes 9b. When the pressure switch 12 is on, the control unit 20 waits for a removal completion signal from the screw tightening device T that takes out the screw 2 at the component supply position, and when this is input through the input / output unit 25, a new pulse train is sent to the motor. This is sent to the drive unit 21. Thereby, when the screw 2 is supported in the support hole 9b at the component supply position, the separation plate 9 waits until the screw 2 is taken out and then rotates intermittently again. In this way, intermittent rotation of the separation plate 9 is controlled.

  Further, when the pressure switch 12 is turned on, a signal is given from the control unit 20 to the input / output unit 25, whereby the operation of the air suction unit V is switched. As a result, only the air suction from the suction hole 5b is stopped, the suction resistance of the screw 2 at the component supply position is lost, and the screw 2 can be easily taken out by the screw tightening device T.

  On the other hand, when the separation plate 9 is unable to rotate, such as when the screw 2 is caught in the gap between the hopper 3 and the separation plate 9, the number of output pulses of the encoder 13b reaches a predetermined value within a predetermined time. do not do. At this time, the control unit 20 gives an error display command signal to the display unit 24 to display an error. Thereafter, when the rotation inhibition factor of the separation plate 9 is removed and the start switch is pushed again, the motor 13 is driven again, and the separation and supply of the screw 2 is resumed. However, when the separation plate 9 stops at a position other than the predetermined position as described above, restart is performed from there, and the subsequent stop position of the support hole 9b is deviated from the component supply position. In order to self-correct such a problem, in the case of restart, the control unit 20 executes a procedure for continuously sending a pulse train to the motor drive unit 21 until the detection unit 11b detects the detected object 11a. Then, when the detection signal of the detected object 11a is sent from the detection means 11b, this continuous pulse train application procedure is stopped, a pulse train based on the intermittent rotation parameter is issued, and the same control procedure as described above is executed. By this processing, the separation plate 9 can be intermittently rotated from a state where the predetermined support hole 9b is accurately positioned at the component supply position. Even if there is no problem that the separation plate 9 cannot rotate, the control unit 20 is based on the intermittent rotation parameter as described above every time the detection unit 11b detects the detected object 11a. Processing to correct the output timing of the pulse train is performed. Thereby, even if it performs the continuous operation which continues the intermittent rotation drive of the separation plate 9 for a long time, the malfunction that the stop position of the support hole 9b will shift | deviate gradually does not occur.

  As described above, when the separation plate 9 rotates intermittently, the support holes 9b... Are sequentially positioned at the component supply position, so that the screw 2 supported by the screw tightening device T can be taken out. During this separation and supply operation, the screw group in the hopper 3 is agitated by the agitation pins 9 c... With the intermittent rotation of the separation plate 9. For this reason, the screw 2 is efficiently fitted into the support holes 9b. Further, since the communication hole 10a has a shape extending in the rotation direction of the separation plate 9, even if the screw group is biased in the rotation direction of the separation plate 9 due to friction accompanying the intermittent rotation of the separation plate 9, these holes are favorably supported. 9b .. can be fitted.

  When it is necessary to replace the separation plate with a different pitch of the support holes 9b or the diameter of the array circle, such as when the type of the screw 2 is changed, the operation unit 23 is operated while viewing the display unit 24 of the control unit 19. Then, the channel number in which the intermittent rotation parameter corresponding to the separation plate is set is selected. Thereby, the drive of the motor 13 can be easily adapted to the exchanged separation plate. In this way, the separation and supply apparatus 1 can handle separation and supply of a very wide variety of headed bars.

  In the above description, the example in which the screw 2 is separated and supplied has been described. However, the separation and supply apparatus 1 according to the present invention separates and supplies various headed bars such as rivets, headed pins, and nails other than screws. When the headed bar other than these screws is separated and supplied, the obtained effect is the same as the above effect. Further, one detection means 11b and one detection object 11a are provided. However, if the number of detection objects 11a is increased, the rotational operation amount of the separation plate 9 is reduced when correcting the shift of the stop position of the support hole 9b. be able to.

Block explanatory drawing by the partially notched cross section which concerns on the AA line of FIG. The principal part top view of the isolation | separation supply apparatus of the bar material with a head concerning this invention. The principal part block diagram of the isolation | separation supply apparatus of the bar with a head concerning this invention. FIG. 2 is an enlarged view around a separation plate as viewed from the direction of arrow Y1 in FIG. 1. FIG. 5 is an enlarged partially cutaway cross-sectional view of a main part taken along line BB in FIG. 4. The principal part expansion partially cutaway sectional view of the separation supply device of the bar with a head concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Separating and supplying apparatus of bar material 3 Hopper part 5 Base 5a Suction hole 5b Suction hole 6 Bucket part 8 Intermittent rotation drive means 9 Separation plate 9b Support hole 10 Ring plate 10a Communication hole 10b Communication hole 11a Detected object 11b Detection means 12 pressure switch 13 stepping motor 15 spindle 18 butterfly bolt 19 control unit 20 control unit 21 motor drive unit 22 storage unit 23 operation unit 24 display unit 25 input / output unit

Claims (1)

A hopper that can store a large number of headed bars, and a plurality of support holes that are provided at the bottom of the hopper so as to be inclined at a predetermined angle from the horizontal and can be fitted with headed bars on the outer periphery. A separation and supply device for a bar with a head having a separation plate arranged in an amount and intermittent rotation driving means for intermittently driving the separation plate for each pitch of the support holes,
While the separation plate is detachably disposed, the intermittent plate has a plurality of channels each capable of setting an intermittent rotation pitch parameter of the intermittent rotation driving means, and the intermittent set to a channel selected from the plurality of channels An apparatus for separating and supplying headed bars, comprising a control unit for driving and controlling the intermittent rotation driving means based on a rotation pitch parameter.

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