JPS6212133B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a parts feeder. It goes without saying that a parts supply machine occupies an important position in an automated system, but malfunctions in the parts supply system often affect the success or failure of the automated system. Particularly in vibrating bowl feeders, the alignment track vibrates, which causes the parts to be fed to vibrate, and the parts to be fed get caught in the wiper of the alignment track, which is provided to prevent alignment, sorting, and overlapping of two parts. This often made it impossible to feed in an aligned manner, or caused blockages at the joint of the chute connected to the discharge port of the vibratory bowl feeder. The rotating parts feeder (Japanese Patent No. 1129756) and the adaptive parts feeding device (Japanese Patent Application No. 57-23516) invented by the applicant have the structure shown in FIG. A variable speed electric motor 5 has a disk 1 rotated by a variable speed electric motor 4 in the center, and a track 2 that contacts the disk 1 at one point and turns upwardly from the disk 1 is a variable speed electric motor 5.
A drop-off prevention wall 3 formed of a part of a spherical surface is integrally formed with the track so as to be in contact with the outer periphery of the disk 1 over the entire circumference at the lower inside of the track. Variable speed electric motors 4 and 5 are mounted on intermediate disk 6. An alignment wall 7 is fixed to the intermediate disk 6 via a suitable object, and the alignment wall 7 is installed above the track 2 as close as possible.

The parts to be supplied stored on the disk 1 are sent to the outer periphery of the disk by the rotation of the disk 1, transferred to the track 2 near the contact point between the disk 1 and the track 2 (this is called the transfer point), and then processed. Only the parts to be supplied that move along the uniform wall 7 and have the desired posture pass through and are discharged.
The incorrectly oriented supplied parts flow back to the disk 1 due to interaction with the alignment wall 7. In order to achieve efficient alignment, the disc 1 and the track 2 have optimum rotational speeds depending on the characteristics of the parts to be supplied, so this can be achieved by making the electric motor variable speed. However, overlapping parts to be supplied may get caught between the wiper and the track provided on the alignment wall 7 to prevent overlapping of the parts to be supplied, or thin parts to be supplied may get stuck between the track 2 and the lower end of the alignment wall 7. There was a drawback that the feeding of the parts to be supplied was stopped due to jamming between the gap and the outer periphery of the disk 1 and the falling-off prevention wall 3. The object of the present invention is to obtain a revolving parts feeder for the purpose of preventing supply stoppage.

The invention will be explained by way of examples. FIG. 2 is a sectional view for explaining the present invention. The disk 1 is driven by a variable speed reversible electric motor 14 that can be changed at variable speed and reversed, and on the outer periphery of the disk 1 there is a track having a falling prevention wall 3 on the lower side. 15. The variable speed reversible electric motors 14 and 15 are fixed to an intermediate disk 6, and an alignment wall 7 is attached to the intermediate disk 6 above the track 2 via appropriate members. A disk detector 16 for detecting the rotation of the disk 1 is attached to the rotating shaft of the electric motor 14, and a track detector 17 for detecting the turning of the track 2 is attached to the rotating shaft of the electric motor 15. Since the rotation of the electric motor is transmitted to the disc 1 and the track 2 via a speed reduction mechanism, the disc detector 16 is attached to the disc or the rotating shaft of the disc, and the track detector 17 is attached directly to the truck or when the truck turns. Even if it is attached to a mechanism, it does not change the gist of the present invention. The disk detector and track detector detect the presence or absence of rotation or the number of rotations, so they detect encoders, rotary generators, and members attached to the rotating shaft using sensors that use light, electricity, magnetism, etc. It can be realized.

FIG. 3 is a block diagram of a control circuit for implementing the invention. A disk detector 16 is provided on the rotating shaft of a variable speed reversible motor 14 that drives the disk 1, and the output of the disk detector 16 is applied to a disk rotation determiner 22 via an amplifier 21. The disk rotation determiner 2
The output of 2 is applied to logic circuit 23. The track rotation detector 17 is attached to the rotating shaft of the variable speed reversible motor 15 that drives the truck 2, and the output of the track rotation detector 17 is applied to the track rotation determiner 32 via an amplifier 31. The output of the track rotation determiner 32 is applied to the logic circuit 23. The logic circuit has an OR element and a flip-flop element. The output of the logic circuit 23 is applied to a sequence circuit 24 having a timer. The sequence circuit 24 generates a signal that normally rotates the variable speed reversible motors 14 and 15 during normal operation, and when it receives an abnormal signal from the logic circuit 23, after a certain period of time, the variable speed reversible motors 14 and 1 rotate.
5 is stopped, then a signal to reverse rotation is issued for a certain period of time, and after the reverse rotation is completed, a stop signal is issued for a certain period of time, and then the normal state is restored. The output of the sequence circuit 24 is applied to a switch 25 provided on the power supply side of the variable speed reversible motors 14 and 15, and a reversal signal is applied to a disk reverser 26 and a track reversor 36. The disc reversing device 26 is connected to the variable speed reversible motor 14 for driving the disc 1, and the track reversing device 36 is connected to the variable speed reversible motor 15 for driving the track. The disc inverter 26 and track inverter 36 are connected to a power source via a switch 25. Inserting a motor speed control circuit between the reversing device and the motor in the control circuit does not change the spirit of the present invention.

The operation of the present invention will be explained with reference to FIGS. 2 and 3.

The parts to be supplied are placed on the disk 1. The disk 1 rotates at an appropriate number of revolutions so that the parts to be supplied are transferred in appropriate quantities to the truck 2 through the transfer point.
If the supplied part is a thin plate or thin rod-like object, or if the bulk supplied part has a thin rod-like long convexity, it will get stuck in the gap between the outer periphery of the disk 1 and the falling-off prevention wall 3, and become stuck. A car accident occurs. When the jamming occurs, the rotation of the disc 1 and the track 2 decreases and stops.

During normal operation, a pulse train is generated from a disc rotation detector 16 and a track rotation detector 17 attached to the rotating shafts of the variable speed reversible motors 14 and 15.
The pulse train generated by the disk rotation detector 16 is applied to an amplifier 21 and smoothed. The smoothed signal is applied to the disk rotation determiner 22, but no output is generated. Similarly, a signal from a truck rotation detector 17 attached to a variable speed reversible motor 15 for driving the truck is applied to an amplifier 31, smoothed, and applied to a truck rotation determiner 32. When the track rotation detector 17 has a signal generated by rotation, the track rotation determiner 32 does not produce an output.

The disc 1 is stopped due to the biting, and the disc 1
When the drive variable speed reversible motor 14 stops, the disc rotation detector 16 stops outputting and no signal enters the amplifier 21, so the disc rotation detector 22
There will be no signal to. The disk rotation determiner 22 generates a signal when the input signal disappears, indicating that the disk 1 has stopped. Furthermore, when the truck 2 stops rotating, the variable speed reversible electric motor 15 for driving the truck stops, so the truck rotation detector 17 loses its output signal, the input to the amplifier 31 disappears, and the output signal from the amplifier 31 disappears. , track rotation determiner 3
The input signal of 2 disappears, and the track rotation judger 3
2 generates an output. Even if the inputs of the disk and track rotation determiners do not become 0, but become smaller than a predetermined value, these determiners may generate outputs, but this does not change the spirit of the present invention. do not have. The outputs of the disc rotation determiner 23 and the track rotation determiner 32 are applied to the logic circuit 23, and the logical sum of the output signals of the disc rotation determiner 24 and the track rotation determiner 32 is generated in the logic circuit 23. The voltage is applied to a flip-flop circuit built in the logic circuit 23, and when the disk 1 or the track 2 stops, the logic circuit 23 continues to generate an output until the normal state is restored. The output of the logic circuit 23 is sent to the timer 24.
is applied and after the first certain period of time, the timer switches to switch 2.
5, the switch 25 is turned off, and the variable speed reversible motors 14 and 15 are completely stopped. Further, after a certain period of time has elapsed, the timer 24 stops sending the signal to the switch 25 and closes the switch 25. At the same time, the timer 24 operates the disc reversing circuit 26 and the track reversing circuit 36, and the variable speed reversible motors 14 and 15 are activated. The disc 1 and the track 2 are rotated in opposite directions by rotating in the opposite direction. The time for this reversal is called reversal time. Even if the reversing circuit 26 is operated during the previous stop time, the gist of the present invention will not change. After the reversal time has elapsed, the timer 24 again issues a stop signal, and the switch 2
5 is disconnected. After or during the stop time, the signals to the disc reversing device 26 and the track reversing circuit are released, and when the stop time has elapsed, the variable speed reversible motors 14 and 15 rotate normally.
Due to this operation, the parts to be fed that are caught in the gap between the disc 1 and the track 2 are removed from the disc 1 and the track 2.
By rotating in the opposite direction, it moves backward to the vicinity of the transfer point and releases the jamming. After the jam is released, it stops for a certain period of time and resumes normal operation. After the signal from the timer 26 to the switch 25 is released in order to resume normal operation, the output of the timer 24 is output from the flip of the logic circuit 23 after a certain period of time has elapsed, that is, the rise time required for the variable speed reversible motor to rotate normally.・Reset the flop circuit. If the jam is not released after one attempt, this operation is repeated. Further, it does not change the spirit of the present invention to provide a timer and add a circuit that does not perform the operation to release the jam when the engine is first started to enter normal operation.

The parts transferred to the track 2 pass only in a predetermined orientation due to interaction with the alignment wall 7, and parts with incorrect orientation are returned to the disk, but in this process, the track 2 and the alignment wall also interact with each other. 7. In this way, when jamming occurs between the alignment wall 7 and the track 2, only the track 2 is forcibly stopped, and the disc 1 continues to rotate. The output of the track rotation detector 17 becomes 0, and the track circuit determiner 32 generates an output signal, so the OR circuit at the input section of the logic circuit 23 generates an output, and performs the above operation to reverse the track and disk. to release the jamming. Even if the disc 1 is stopped and only the track is reversed, the gist of the present invention will not change. Further, it does not change the spirit of the present invention to provide a circuit that increases the torque generated by the electric motor during reverse rotation.

The operation has been explained above, but even if the supplied part gets caught between the disk 1 and the falling-off prevention wall 3, or gets caught between the track 2 and the alignment wall 7, the falling-off preventing wall 3 will be stuck between the tracks 2 and 2. Since it is an integral structure, the truck 2 will always stop or its rotation will be reduced. Further, the disc 1 is driven by the variable speed reversible electric motor 14 via a reduction gear, but by reducing the reduction ratio, when the electric power of the electric motor 14 is not applied,
Assuming that the electric motor is rotated by the disk 1, when a supplied component is caught between the disk and the fall prevention wall 3, if the truck 2 is rotated in the opposite direction, the fall prevention wall 7 will not rotate. Since the disc 1 is also rotated in the opposite direction by the bitten part to be fed, the part to be fed moves backward to the vicinity of the transfer point and is released from biting. In order to operate in this manner, the disk rotation detector 16 attached to the rotating shaft of the disk 1 becomes unnecessary. A block diagram of a control circuit for this purpose is shown in FIG. A truck rotation detector 17 is provided which is attached to the rotating shaft of the truck 2 or to the shaft of a variable speed reversible electric motor 15 that drives the truck 2. The output of the track rotation detector 17 is applied to a track rotation determiner 32 via an amplifier 31. When the signal from the truck rotation detector 17 is 0 or less than a certain value, that is, the truck stops or rotates slowly, the truck rotation determiner 32 generates an output. The output of the track rotation determiner 32 is applied to a timer 24. Timer 24 consists of a flip-flop circuit and a timer, and its output is connected to switch 25.
It is applied to the truck reversing circuit 36 which causes the variable speed reversible motor 15 of the truck 2 to reverse. When the truck rotation determiner 32 detects that the rotation of the truck has decreased or stopped, a signal from the truck rotation determiner 32 is applied to the timer 24, which operates the flip-flop to activate the variable speed reversible motor 15 for driving the truck. Then, the electric circuit to the variable speed reversible motor 14 that drives the disc 1 is disconnected by switches 25 and 35, and after a certain period of time, the timer applies a signal to the track reversal circuit 36 to configure a reversal circuit. A signal is applied to switch 35 to reverse the variable speed reversible motor 15 for driving the truck. The disk 1 is also rotated in the opposite direction due to the biting of the supplied part, and the supplied part is sent backwards beyond the transfer point.
Biting is released. The gist of the present invention is not changed by attaching a clutch to the rotating shaft of the disc 1 to disconnect the variable speed reversible motor 14 and the disc 1 when the disc 1 is rotated in reverse to ensure smooth reverse rotation of the disc 1. After track 2 is reversed for a certain period of time, timer 2
4 applies a signal to the switch 35 to stop the variable speed reversible motor 15 again, and after stopping for a certain period of time, the timer 24 releases the reverse command applied to the truck reversal circuit 36, and the variable speed reversible motor 15 returns to normal. After the circuit is restored to normal rotation, the signal from timer 24 cancels the stop signals applied to switches 25 and 35, allowing disk 1 and track 2 to rotate normally.

After a predetermined period of time has elapsed after normal rotation, the timer section issues a signal to release the flip-flop and return everything to normal operation.

If the jamming is not released even after normal operation is restored, the above operation is repeated. It does not change the spirit of the present invention to add a device that issues an alarm or automatically stops all operations when the jamming is not released even after this operation is repeated several times.

According to the present invention, the revolving parts feeder has a self-repair function, which makes it possible to improve the operating rate of an automated system and greatly contributes to an unmanned production system.

[Brief explanation of the drawing]

Figure 1: Explanatory diagram of the revolving parts feeder 1: Disc, 2: Track, 3: Fall prevention wall,
4: Variable speed electric motor that rotates the disk, 5: Variable speed electric motor that rotates the track, 6: Intermediate disk, 7: Aligning wall. Figure 2: Explanatory diagram of functional parts of the present invention 1: Disc, 2: Track, 3: Fall-off prevention wall, 1
4: Variable speed and reversible electric motor that drives the disc,
15: Variable speed reversible electric motor for turning the truck;
6: intermediate disk, 7: alignment wall, 16: disk rotation detector, 17: track rotation detector. Figure 3: Control circuit block diagram of the present invention 21: Amplifier, 22: Disk rotation determiner, 23:
Logic circuit, 24: timer, 25: switch, 2
6: disk reversal circuit, 31: amplifier, 32: track rotation determiner, 35: switch, 36: track reversal circuit. Figure 4: Block diagram of a control circuit that reverses only the track.

Claims (1)

[Scope of Claims] 1. A rotating disc, a variable speed electric motor that drives the disc, an annular track that is inclined to the outer periphery of the disc and whose inner side slides into contact with a point on the outer periphery of the disc, and A fall prevention wall formed of a part of a spherical surface provided at the lower part of the inner side and in contact with the disks over the entire circumference, a variable speed and reversible electric motor for driving the track, and an electric motor provided above the track. an alignment wall, a track rotation detector, a track rotation determiner,
It consists of a timer, a switch whose operation is controlled by the timer, and a reversing circuit.
A rotating parts supply device characterized by having a track rotation detector that reverses the track and enables self-repair when a supplied part is caught between a falling-off prevention wall fixed to the track and the outer periphery of a disc. Machine. 2. A rotating disc, a variable-speed and reversible electric motor that drives the disc, an annular track that is inclined to the outer periphery of the disc and whose inside touches a point on the outer periphery of the disc, and an inside of the track. A disk formed by a part of a spherical surface provided below, a fall prevention wall that slides over the entire circumference of the disk, a variable speed and reversible electric motor that drives the truck, and an electric motor located above the truck. an alignment wall provided, a track rotation detector, a disk rotation detector, a track rotation determiner, a disk rotation determiner, a rotation determiner for the track, and a disk rotation detector. a logic circuit that performs a logical operation on the output from the rotation determiner, and a timer that operates based on the output of the logic circuit;
It consists of a switch and a reversing circuit that operate according to a timer command, and when the supplied part gets caught in the gap between the disc and the falling prevention wall, or the gap between the track and the alignment wall, the track and disc are A rotating parts feeder characterized by having a rotation detector and a reversing circuit that rotates in the opposite direction to eliminate jamming and self-repair.