JP2003275929A - Residue detecting device for drum feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a residue detecting device for a drum feeder, having such construction as to easily detect the residue of headed parts such as screws stored in a rotary drum. <P>SOLUTION: The resin rotary drum 6 including part of the rotary shaft 5 is provided for dropping the screws stored therein on the rotary shaft 5 and a magnetic sensor 8 is arranged in proximity to the lower part of the rotary drum 6. When an output signal from the magnetic sensor 8 is at a predetermined signal level or lower for a preset continuous time, a lack of the residue is alarmed or displayed. In such construction, the residue of the screws stored in the rotary drum 6 being rotated is accurately detected as well as the residue thereof is detected without any trouble even when the screws are stained. Since the residue of the screws is detected between two adjacent vanes 6g, the lacking residue of the screws is found to be extremely less, if detected, and the screws are efficiently supplied to a working position on a working machine such as a screw tightening machine. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine for tightening work such as a screw tightener or the like, by arranging and supplying headed parts such as screws and bolts. The present invention relates to a device for detecting the remaining amount of a drum feeder to be supplied to a vehicle. 2. Description of the Related Art Conventionally, there are hopper blade type feeders and rotary drum type feeders as devices for aligning and supplying screws as an example of a headed part. Expression feeders are frequently used. As shown in FIG. 4, this kind of rotary drum type feeder has a regular feed path 21 composed of a chute rail that is slightly inclined via a vibrating part 20 and held in a substantially horizontal posture. A rotating drum 26 is arranged so as to surround one end of the path 21. The rotary drum 26 has a cylindrical portion 26a through which the feeding path 21 passes, and a radial blade 26b having a central portion cut off along the axis thereof is fixed inside the cylindrical portion 26a. The rotary drum 26 is inclined so that screws (not shown) can be stored therein, and is configured to rotate in response to rotation of a motor (not shown). The screw scraped up by the internal blades 26b falls onto the regulating path 21 and is aligned on the regulating path 21. In this rotary drum type feeder, when the remaining amount of the screw in the rotary drum 26 is detected, the rotary drum 26 is rotated. At present, there is no means for detecting the remaining amount of the screw remaining inside the rotary drum other than using a sensor. However, when a transparent rotary drum is used, the rotary drum becomes dirty due to the dirt on the screws, and the rotary drum needs to be frequently cleaned. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned demands, and provides a drum feeder remaining amount detecting device configured to easily detect the remaining amount of headed parts such as screws stored in a rotary drum. It is something to offer. [0005] Means for solving the problems [0005] While a regular feed path maintained in a fixed posture with respect to the base is arranged, one end side of the regular feed path is provided with a cylindrical portion which rotates by receiving rotation of a motor. The rotating drum was positioned inside the rotating drum, and the cylindrical portion of the rotating drum was made of resin. The inwardly extending magnetic material blades were fixed inside the cylindrical portion, and were stored in the cylindrical portion with the rotation of the rotating drum. In a drum feeder configured to lift a headed component by a blade and drop it on a regular feeding path, and to send and discharge the headed component to the other end side of the regularizing path, the drum feeder is provided below a peripheral surface of a rotating drum and a blade. When a magnetic sensor is disposed at a position where the passage of the blade is detected, and when the output signal of the magnetic sensor has dropped to a signal level for detecting the passage of the blade and the passage of the adjacent blade is not continuously detected for a predetermined time, the remaining amount signal is output. Configured to output Have been. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 2, reference numeral 1 denotes a drum feeder for supplying a screw as an example of a magnetic headed component, and a base 2 is provided with a fixed rod 3 held in a substantially horizontal attitude slightly inclined via a fixture 2a. Have. At one end of the fixed rod 3, a unit body 4a of a separation unit 4 described later is fixed, and two lead shafts 4b which are parallel to the unit body 4a and held rotatably.
Is provided. The lead shaft 4b and a support 3a provided at the other end of the fixed rod 3 extend parallel to the fixed rod 3 and are parallel to each other with a gap through which a leg of a screw (not shown) passes. Two extending rotating shafts 5 are rotatably arranged. Gears 5a are fixed to the support 3a side of the rotating shaft 5, and the gears 5a mesh with each other.
, A driven pulley 5b attached to an outer lid 6a of a rotary drum 6 described later, and a round belt 6c wound around both pulleys 5b, 6b rotate the rotary drum 6 in two rotations. It is configured to be transmitted to the rotating shaft 5. The lead shaft 4b of the separation unit 4 is configured to be rotatable with respect to the rotating shaft 5 when rotated by a motor (not shown) fixed to the unit body 4a. It is configured such that there is no problem even if the rotating shaft 5 rotates simultaneously. Also,
The unit main body 4a is provided with a downwardly extending discharge hole 4c located between both shafts on the terminal side of the lead shaft 4b, and screws are discharged one by one from the discharge hole 4c, and a screw tightener (not shown) is used. ) Is configured to be air-fed to the tightening position. The rotary drum 6 has an inner lid 6d rotatably fixed to the fixture 2b, an outer lid 6a provided with a screw input lid 6f for closing the input port 6e, and an equal interval between the two lids. And a steel blade 6g which is an example of a magnetic body fixed radially. The outer side of the blade 6g is fixed at a position inscribed in the virtual cylinder.
g is configured such that the central portion is cut out along the axis of the virtual cylinder and the rotary shaft 5 is located at this position. The rotary drum 6 has an open / close lid 7 made of hard resin, which is in contact with both lids and the blade 6g, and has a shape obtained by dividing the cylindrical shape of the virtual cylinder into two. Are configured to form the circumferential surface of the rotating drum 6. As shown in FIG. 3, the opening / closing lid 7 is connected by a hinge portion below it, and a buckle 7b having a hook 7a is fixed to one side, and the hook 7a is locked to the other side. The tool 7c is fixed. The inner lid 6d has a gap through which one end of the rotary shaft 5 passes, and is configured so that screws stored in the rotary drum 6 do not overflow from the rotary drum 6. A pulley 6h receiving rotation of a motor 2c disposed inside the base 2 is fixed to the inner lid 6d, and the inner lid 6d is rotated by the rotation of the motor 2c.
The rotary drum 6 including the blades 6g, the outer lid 6a, and the opening / closing lid 7 is configured to rotate while including one end of the rotary shaft 5. The opening / closing lid 7 is made of a resin plate, and a magnetic sensor 8 is disposed below the opening / closing lid 7 as shown in FIG. The magnetic sensor 8 constitutes a remaining amount detecting device, and outputs an output signal of a predetermined signal level or more every time the blade 6g passes by the rotation of the rotary drum 6, and the remaining amount of the screw remaining between the blades 6g. And outputs an output signal having a signal level corresponding to. The remaining amount detection device is configured to reset the previous remaining amount detection when the output signal of the magnetic sensor 8 decreases to a signal level at which the passage of the blade 6g can be detected. When the output signal does not rise to a signal level for detecting the passage of the blade 6g for a predetermined period of time from this point, the screw between the two adjacent blades 6g in the rotary drum 6 is used. It is configured to output a remaining amount insufficient detection signal or an alarm signal when there is no longer. Incidentally, the opening / closing lid 7 may be a single plate member having a rubbing structure, or another fastener may be used when closing the opening / closing lid 7. Further, a chute rail (not shown) provided with a vibrating section may be used as a regular feed path. Further, the outer cover 6a of the rotating drum 6 is formed separately from the blade 6g,
The rotating drum 6 may be constituted by the inner lid portion 6d, the blade 6g, a holding frame (not shown) for holding the blade 6g, and the opening / closing lid 7. In the above-mentioned drum feeder, the screw input lid 6f
Is opened and a screw is inserted from the input port 6e.
c is driven to drop the screws stored in the rotating drum 6 onto the rotating shaft 5. At the same time, the rotation of the rotating drum 6 is transmitted to the rotating shaft 5 via the driving pulley 6b, the driven pulley 5b, and the round belt 6c, and the two rotating shafts 5 rotate in a direction to lift a screw located between both shafts, The screws are aligned and supplied to the separation unit 4 provided at the end of the rotating shaft 5. In the separation unit 4, the lead shaft 4b is driven by another motor, and the screws aligned on the rotary shaft 5 are discharged one by one from the discharge port along the lead groove. During this time, when the screw in the rotary drum 6 remains so as to overflow between the two adjacent blades 6g, the magnetic sensor 8 continues to output a signal of a predetermined signal level or more.
Therefore, the remaining amount detection device does not output the remaining amount detection signal. On the other hand, the number of screws remaining between two adjacent blades 6g of the rotary drum 6 is reduced, and
When the blade 6g is separated, the output signal of the blade 6g drops to a predetermined signal level at which the passage of the blade 6g can be detected as one blade 6g passes near the magnetic sensor 8. At this time, time measurement is started, and when the output signal returns to a predetermined signal level at which passage of the blade 6g is detected within a predetermined time, the remaining amount insufficient display signal is not output,
The time measurement is reset. The output signal is supplied to the blade 6 within a predetermined time.
When the signal level does not return to the predetermined signal level at which the passage of g is detected, an insufficient remaining amount detection signal is output, and the insufficient remaining amount is warned or displayed. Therefore, the amount of the remaining screw in the rotating drum 6 can be determined based on the remaining amount of the screw remaining between the two adjacent blades 6g, and the remaining amount can be detected in a state where the remaining amount is extremely small. As described above, according to the present invention, there is provided a rotary drum made of resin which includes a part of a regulating path and drops a headed part stored therein onto the regulating path, A magnetic sensor is arranged in the vicinity of the lower part of the rotating drum, and when the output signal of the magnetic sensor continuously drops below a predetermined level for a predetermined time, a warning or display is provided to alert the user of the insufficient remaining amount. There is an advantage that not only can the remaining amount of the headed component stored in the rotating drum be reliably detected, but also the remaining amount can be detected without any trouble even if the headed component is dirty. Further, since the present invention is configured to detect the remaining amount of the headed component between two adjacent blades, the remaining amount of the headed component when the remaining amount is detected to be insufficient is extremely small, and the head is efficiently mounted. There are advantages such as that parts can be supplied to a working position of a working machine such as a screwing machine.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a main part side view showing a mounted state of a magnetic sensor according to the present invention. FIG. 2 is a cross-sectional view of the drum feeder according to the present invention, with a part cut away. FIG. 3 is an external view showing a state where an opening / closing lid according to the present invention is opened. FIG. 4 is an overall view of a rotary drum type feeder showing an example of a conventional example. [Description of Signs] 1 Drum feeder 2 Base 2a Fixture 2b Fixture 2c Motor 3 Fixed rod 3a Support 4 Separation unit 4a Unit body 4b Lead shaft 4c Discharge hole 5 Rotary shaft 5a Gear 5b Driven pulley 6 Rotary drum 6a Outside Lid 6b Driving pulley 6c Round belt 6d Inner lid 6e Slot 6f Screw input lid 6g Blade 6h Pulley 7 Opening / closing lid 7a Hook 7b Buckle 7c Latch 8 Magnetic sensor 20 Vibrating part 21 Regulating path 26 Rotating drum 26a Cylindrical Part 26b feather

   ────────────────────────────────────────────────── ─── Continuation of front page    F-term (reference) 2F014 CB10                 3C030 AA22                 3F080 AA24 BA01 BA02 BC04 BC07                       BD07 BF11 CC01 CC09 CD06                       CE13 CF08 DB04 EA09

Claims (1)

Claims: 1. A tracing path, which is held in a fixed posture with respect to a base, is disposed, and one end of the tracing path is provided with a cylindrical portion which rotates by receiving rotation of a motor. The cylindrical portion of the rotary drum is made of resin, the inwardly extending magnetic blades are fixed inside the cylindrical portion, and the head stored in the cylindrical portion with the rotation of the rotary drum. In a drum feeder configured to lift a part with a blade by a blade and drop it on a regular feeding path, and to send and discharge the headed part to the other end of the regular path, the lower part of the rotating drum and the lower part of the blade A magnetic sensor is arranged at a position where the passage is detected, and when the output signal of the magnetic sensor drops to a signal level for detecting the passage of the blade and the passage of the blade is not continuously detected for a predetermined period of time, the remaining amount signal is output. Characterized in that Level detecting unit.