JP2010083627A - Part supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a part supply device for preventing biting-in of a headed part, when aligning and supplying the headed part such as a screw in a row. <P>SOLUTION: This part supply device 1 has sending-out belts 12a and 12b for suspending and carrying a head part of the headed part S, a means for supplying the headed part to these sending-out belts 12a and 12b, a rotational driving source 10 for normally rotating or reversely rotating these sending-out belts 12a and 12b, a separately supplying unit 19 continuously arranged on the carrying final end of the sending-out belts 12a and 12b and moving the headed part S to a predetermined position, and a control device 26 for driving the rotational driving source 10 for reversely rotating when necessary. When the headed part S suspended by the sending-out belts 12a and 12b bites in an adjacent headed part S by reverse rotation driving of these sending-out belts 12a and 12b, since this biting-in is released, the part can be stably supplied. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a component supply device that prevents generation of noise and biting of a headed component when a headed component such as a screw is sent and suspended from a belt.

  Conventionally, when headed parts such as bolts and screws are supplied to a screw tightening tool, a fan-shaped rake plate that moves up and down in the storage hopper and a linear feeder having a chute part that supports the head of the headed parts are provided. A component supply device is used. In this component supply device, as the rake plate rises, the headed component stored in the storage hopper is scooped up, the head moves to the chute portion that slides down along the upper end surface of the rake plate, and on the chute portion. They are aligned in a line in an upright posture and conveyed to the forward side.

Japanese Patent Laid-Open No. 2005-67797

  In the component supply apparatus, since the linear feeder is driven by the vibrator, when the headed component is sent to the forward side, contact occurs between the headed components, and noise is generated. Furthermore, since the headed parts are configured to be sequentially conveyed on the chute portion of the component supply device, the heads of the headed parts on the chute part may bite into the adjacent headed parts. . At this time, since the headed component reaches the final conveyance end in an unaligned posture, for example, when the headed component is supplied to the screw tightening tool by air supply using a hose, the headed component is accurately supplied to the hose. There was a problem that the parts supply work was stopped without being sucked into the machine.

  The present invention has been made in view of the above problems, and is provided with a feeding belt that is arranged with a gap through which a leg portion of a headed component can pass and suspends and conveys the headed component. Means for supplying a headed part to the belt, a rotational drive source for rotating the feed belt forward or backward, and a head part connected to the final conveying end of the delivery belt and reaching the final conveying end And a separation supply unit that moves the rotation drive source to a predetermined position, and a heading component that is normally forward-driven by rotating the rotation drive source to forward-rotate the belt and suspended from the delivery belt to the separation-supply unit. While supplying, it is provided with the control apparatus which reversely drives the said rotational drive source as needed.

  The control device is characterized in that when the headed component supplied to the separation supply unit has reached a predetermined position, the rotary drive source is temporarily reversely driven.

  According to the component supply apparatus of the present invention, the feed belt that rotates forward by the normal rotation drive of the rotation drive source and conveys the headed component is configured to reverse as necessary. Therefore, even if the headed component suspended from the delivery belt is pushed by the rear headed component and bites into the front headed component, the biting is released by the reverse rotation of the delivery belt. Accordingly, since all the headed parts suspended from the feeding belt are supplied to the separation supply unit in an aligned posture, there is no problem that the parts supply work is stopped due to the biting of the headed parts.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a component supply device that supplies screws S as an example of a headed bar material in a line, and includes side plates 3a, 3b that cover the bottom plate 2 having the legs 2a and the four surfaces of the bottom plate. 3c and 3d. A storage hopper 4 is attached to each of the three side plates 3a, 3b, 3c at a predetermined distance from the remaining side plate 3d and on the upper side. The storage hopper 4 has an inclined bottom surface portion 4a and an upright surface portion 4b, and an opening 5 extending in parallel with the upright surface portion 4b is provided at the deepest portion of the inclined bottom surface portion 4a over a length of 1/2. Yes. The storage hopper 4 has an inclined side surface portion 4c extending continuously from the inclined bottom surface portion 4a and the upright surface portion 4b. The lower end of the storage hopper 4 reaches the side portion of the opening 5, and a screw S stored in the storage hopper 4 is provided. It is configured to gather in the opening 5. Further, guide rails 7a and 7b constituting the component feeding mechanism 6 are respectively attached to the upright surface portion 4b of the storage hopper 4 and the belt mounting plate 9 disposed at a predetermined distance from the upright surface portion 4b. The guide rails 7a and 7b are arranged at a predetermined interval so that the legs of the screws S are accommodated.

  As shown in FIG. 1, the component feeding mechanism 6 has a pulley mechanism 11 that rotates by driving of a drive motor 10. Two feed belts 12a and 12b having protrusions formed on the upper surface thereof are attached to the pulley mechanism 11 so as to rotate as the pulley mechanism 11 rotates, and the legs of the screw S are loosely fitted. In this state, the screw S is suspended and conveyed. Further, the feed belts 12a and 12b are supported by the guide rails 7a and 7b so as not to hang down due to the weight of the screw S when the screw S is suspended. One end of each of the guide rails 7a and 7b extends to the exposure window 8 provided on the side plate 4a, and is configured to be suspended in an aligned posture in which the screws S are erected together with a component delivery portion 17 described later.

  The drive motor 10 is configured to be driven forward or reversely according to a command from the control device 26, which will be described in detail later. During forward rotation, the feed belts 12a and 12b are rotated forward to turn the screw S in detail. The feed belts 12a and 12b are configured to be reversely conveyed while being conveyed in the direction of a separation supply unit 19 to be described later.

  As shown in FIG. 2, a rod cylinder 13 is fixed upright on the belt mounting plate 9 so as to be positioned on the back surface of the belt mounting plate 9, and the slider 14 has a predetermined distance on the belt mounting plate 9 side. Are configured to reciprocate. A lift 15 is fixed to the slider 14 and is configured to be able to move up and down in a notch window 9 a cut out on the belt mounting plate 9. A push-up plate 16 is fixed upright on the lifting platform 15, and its upper end surface is configured to block the deepest opening 5 of the storage hopper 4. The push-up plate 16 is raised along the upright surface portion 4b of the storage hopper 4 by the operation of the rodless cylinder 13, and the upper end surface of the push-up plate 16 protrudes upward from the upright surface portion 4b when it is at the highest position. ing. The push-up plate 16 has such a thickness that one screw S lying along the upright surface portion 4b can be placed, and its upper end surface is inclined toward the upright surface portion 4b side of the storage hopper 4, so that the push-up plate 16 rises up most. When the position is reached, the screw S is configured to drop to the component feeding mechanism 6 side.

  A component transfer portion 17 is disposed on the forward side of the feed belts 12a and 12b. The parts delivery portion 17 extends on the extension of the feed belts 12a and 12b, and is configured such that the upright screw S suspended on the feed belts 12a and 12b can be transferred to the parts delivery portion 17. ing. The front end of the component delivery section 17 extends to a separation supply unit 19 which will be described in detail later, and is configured to suspend the screws S together with the feed belts 12a and 12b and supply the separation supply unit 19 with the screws S. Yes.

  On the belt mounting plate 9, an unaligned part removing plate 18 is fixed so as to cross obliquely above the feed belts 12a and 12b. The unaligned part removing plate 18 has a head of a screw S in an upright position. A notch (not shown) through which the part can pass is provided. The notch is dimensioned so that the head of the screw S in a lying posture cannot pass through. When the head of the screw S comes into contact with the misalignment exclusion plate 18, the notch is moved along with the movement of the feed belts 12a and 12b. The screw S moves along the extending direction, and is pushed out from above the feed belts 12 a and 12 b and returned into the storage hopper 4.

  On the other hand, a separation supply unit 19 is connected to the part delivery mechanism 17 at the final end of the component feeding mechanism 6 via a mounting base (not shown). The separation supply unit 19 includes a guide rail 20 that is connected to the tip of the component delivery portion 17 and extends in a direction intersecting with the guide rails 7 a and 7 b and the feed belts 12 a and 12 b, and is sandwiched between the guide rails 20. Thus, the delivery block 21 is arranged. An air cylinder 22 is attached to the side surface of the guide rail 20, and the air cylinder 22 has a plunger 22 a that reciprocates in the extending direction of the guide rail 20 by supplying air. The delivery block 21 is connected to the plunger 22a, and is configured to reciprocate so as to be guided by the guide rail 20 as the plunger 22a reciprocates. Further, the delivery block 21 is formed with a holding hole 21a by notching the side surface. The holding hole 21 a is configured to receive the screw S supplied from the component feeding mechanism 6 by being connected to the tip of the component delivery portion 17 and holding it. When the screw S is supplied to the holding hole 21a, the arrival detection sensor 23 arranged above the holding hole 21a detects this, and when this arrival detection signal is issued, the air cylinder 22 operates. The delivery block 21 is referred to as a delivery position (hereinafter, the position where the delivery block 21 has moved to reach the predetermined position is referred to as delivery position), while the holding hole 21 a of the delivery block 21 is The position connected to the tip is called a normal position).

  A take-out detection sensor 24 is arranged near the delivery position. When the presence of the screw S reaching the delivery position is detected and the screw S is present, the delivery block 21 is set here. It is configured to stop. The take-out detection sensor 24 issues a return command signal to the air cylinder 22 when the screw S at the delivery position is supplied to a screw tightening tool (not shown) and disappears, and the delivery block 21 returns to the normal position. To do. With such a configuration, the separation supply unit 19 separates and feeds the screws S suspended from the feeding belts 12a and 12b of the component feeding mechanism 6 and aligned and conveyed in a row from the ones at the tip. It is configured to send out to a position.

  Further, the parts supply device 1 of the present invention is disposed above the full detection sensor 25 attached to the non-aligned part exclusion plate 18 and the holding hole 21a of the delivery block 21 at the normal position as described above. An arrival detection sensor 23 and an extraction sensor 24 for detecting whether or not the screw S held in the holding hole 21a of the delivery block 21 that has reached the delivery position has been supplied to the screw tightening tool are provided. The drive motor 10 and the rod cylinder 13 are configured to stop driving when the full detection sensor 25 detects the screw S that is suspended by the feed belts 12a and 12b in an upright posture.

  Furthermore, the component supply device 1 of the present invention includes a control device 26 that controls the drive motor 10, the rod cylinder 13, and the air cylinder 22 in accordance with signals from the various sensors 23, 24, and 25. When a work start command signal is issued by an operator, the control device 26 drives the drive motor 10 in the normal direction and operates the rod cylinder 13. Thereafter, when the screw S suspended from the feed belts 12a and 12b reaches the screw separation and supply unit 19 and is sent to the holding hole 21a of the delivery block 21, this is detected by the arrival detection sensor 23. Is detected and an arrival detection signal is issued to the control device 26. When the control device 26 receives this arrival detection signal, it issues an operation command signal to the air cylinder 22 and sends it out, and the sending block 21 moves to the sending position. When the take-out detection sensor 24 detects the screw S that has reached this delivery position, the control device 26 issues a stop command signal to the air cylinder 22, and while there is a screw at this delivery position, the delivery block is sent here. 21 is made to wait. Thereafter, when the detection sensor 24 detects that the screw S at the delivery position is supplied to the screw tightening tool and the screw S is lost from the delivery position, the control device 26 sends a return command signal to the air cylinder 22. The transmission block 21 is configured to return to the normal position.

  The control device 26 is configured to stop driving the drive motor 10 when a full detection signal is issued by the full detection sensor 25, but the delivery block in which the arrival detection sensor has returned from the delivery position to the normal position. When it is detected that there is no screw S in the holding hole 21a, the drive motor 10 is driven to rotate forward until the leading screw S suspended from the feed belts 12a and 12b is supplied to the holding hole 21a. It is configured as follows.

  On the other hand, when the take-out detection sensor 24 detects the screw S at the delivery position and the delivery block 21 is at the delivery position, the control device 26 issues a reverse drive command signal to the drive motor 10. When the drive motor 10 receives this reverse command signal, the drive motor 10 performs reverse drive for a set time. The reverse drive time can be arbitrarily set, and it is desirable to move about half of the head of the screw S suspended from the delivery belts 12a and 12b, and the screw S reaches the delivery position. It is desirable to set so as not to exceed the time from when the screw S is supplied to the screw tightening tool. When the set time drive motor 10 is driven in reverse, the control device 26 drives the drive motor 10 in forward rotation again. In short, each time the screw S reaches the delivery position, the control device 26 is configured to temporarily reversely drive the drive motor 10 that normally rotates.

  In the component supply apparatus 1 of the present invention, as shown in FIG. 3 (a), the screw S suspended from the feeding belts 12a and 12b is pushed by the rear screw S and bites into the adjacent screw S. In some cases, the leg portion of the screw S is inclined to be in an unaligned posture. When the screw S is sent out and supplied to the holding hole 21a of the block 21 in this misaligned posture, the screw S is caught between the holding hole 21a and the component delivery portion 17 to stop the component supply operation. Problem occurs. However, in the component supply device 1 of the present invention, the control device 26 is configured to temporarily reversely drive the drive motor 10 that normally rotates, as shown in FIG. Since the screw S in the aligned posture can be returned to the upright posture, the above-described problem does not occur at all, and the component supply operation can proceed smoothly.

It is a top view sectional view of the present invention. It is the sectional view on the AA line of FIG. It is a figure which shows the attitude | position of the screw suspended by the delivery belt.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Component supply apparatus 2 Bottom plate 2a Leg 3a Side plate 3b Side plate 3c Side plate 3d Side plate 4 Storage hopper 4a Inclined bottom surface portion 4b Upright surface portion 4c Inclined side surface portion 5 Opening 6 Component feed mechanism 7a Guide rail 7b Guide rail 8 Exposed window 9 Belt mounting plate 9a Notch window 10 Drive motor 11 Pulley mechanism 12a Feed belt 12b Feed belt 13 Rod cylinder 14 Slider 15 Lifting table 16 Push-up plate 17 Component delivery portion 18 Unaligned component exclusion plate 19 Separation supply unit 20 Guide rail 21 Delivery block 21a Holding Hole 22 Air cylinder 22a Plunger 23 Arrival detection sensor 24 Removal detection sensor 25 Full detection sensor 26 Control device

Claims (2)

A delivery belt that is arranged with a gap through which the leg of the headed component can pass and suspends and transports the headed component;
Means for supplying headed parts to the delivery belt;
A rotational drive source for normal or reverse rotation of the delivery belt;
A separation supply unit that is connected to the final conveying end of the delivery belt and receives a headed component that has reached the final conveying end, and moves it to a predetermined position;
The rotary drive source is always driven in the normal direction to rotate the feed belt forward, and the headed parts suspended from the feed belt are supplied to the separation supply unit, while the rotary drive source is reversed if necessary. And a control device for driving the component supply device.   2. The component supply device according to claim 1, wherein when the headed component supplied to the separation supply unit reaches a predetermined position, the control device temporarily reversely drives the rotation drive source. .

Images