JPS582789B2 - Sorting device for circular workpieces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sorting device that measures the quality of the inner diameter of annular workpieces and takes them out.

Conventionally, when polishing the cylindrical inner circumferential surface of annular workpieces such as the inner ring of ball bearings or helical gears used in transmissions of small automobiles, a large number of workpieces are required to increase polishing efficiency. Many workpieces are placed in rows on the same axis and stack honed in one step.

If there is a workpiece that has an inner diameter smaller than the allowable size among the workpieces that are polished at the same time during stack honing, the honing wheel may be worn out or damaged by the defective workpiece. In addition to significantly shortening the life of the grinding wheel, there were other problems that reduced the machining accuracy of many workpieces.

Therefore, in the present invention, the annular workpiece can be reliably, quickly and easily screened for quality before being fed to the stack honing device, and the annular workpiece can be prevented from being damaged and the machining accuracy is reduced. The purpose of this invention is to provide a sorting device.

An embodiment of the present invention will be described below with reference to the drawings. 1 is an apparatus body 4 that is inclined upwardly so that the annular workpiece W naturally falls from the intake port 2 at the upper end toward the outlet 3 at the lower end. On the left and right sides of the supply chute 1 near the outlet 3, there are objects that are moved forward and backward by compressed air or the like in a direction perpendicular to the workpiece guide path 5 of the supply chute 1. A fluid cylinder 6 for measuring and restraining the inner diameter of a workpiece and a fluid cylinder 7 for assisting measurement are installed facing each other.

Reference numeral 8 denotes a measuring rod fixed to the piston rod 9 of the internal diameter measuring and stopping fluid cylinder 6 via a fitting 10, and the tip of this measuring rod 8 is connected to a small hole bored in the side wall 11 of the supply chute 1. 12, and the axis of this measuring rod 8 is aligned with the center line of the lowest annular workpiece W of the supply chute 1.

In addition, the outer diameter of the measuring rod 8 is made approximately equal to the inner diameter of a normal annular workpiece W, so that it cannot be fitted onto the inner peripheral surface of an annular workpiece W whose inner diameter is smaller than the allowable dimension. be.

Further, a tapered guide portion 13 is formed at the tip of the measuring rod 8 so that the measuring rod 8 can easily fit into the inner circumferential surface of the workpiece W.

Reference numeral 14 denotes a stop bar that stops the inner surface of the second (next) annular workpiece W from the bottom of the supply chute 1. The distance between the centers of the measuring rod 8 and the stop rod 14 is set at the center of the lowest workpiece W and the next workpiece so that the measuring rod 8 and the stopper rod 14 can be stopped at a very slight distance from the annular workpiece W. It is fixed to the mounting bracket 10 with the space slightly wider than the interval.

The tip of this stop bar 14 is connected to the side wall 11 of the supply chute 1.
It is slidably fitted into another small hole 15 bored in the
The outer diameter of the stopper rod is made sufficiently smaller than the inner diameter of the workpiece so that the stopper rod 14 can easily fit into the inner peripheral surface of the workpiece W, and a tapered guide portion 16 is formed at the tip. There is.

The stop rod 14 is made longer than the measuring rod 8, and the tip of the stop rod 14 is fitted into the inner circumferential surface of the workpiece W in advance of the tip of the measurement rod 8, and the stop rod 14 allows the next workpiece to be machined. After the object W is stopped, the lowest workpiece W is measured using the measuring rod 8.

17 is a piston rod 18 of the measurement auxiliary fluid cylinder 7.
The axis of the measurement auxiliary rod 17 is aligned with the axis of the stop rod 14, and the axis of the measurement auxiliary rod 17 is fixed to the side wall 20 of the supply chute 1 through a small hole 21. When the tip of the auxiliary rod 17 is moved in and out of the workpiece guide path 5, and the measurement rod 8 is stuck on the inner peripheral surface of the lowest workpiece W and cannot be retreated, as will be described in detail later,
The tip of the measurement auxiliary rod 17 applies an impact to the tip of the stop rod 14, and by slightly knocking back the stop rod 14, the measurement rod 8 is released from the workpiece W.

In addition, this measurement auxiliary rod 17 has an outer diameter sufficiently smaller than the inner diameter of the workpiece so that it can easily fit onto the inner circumferential surface of the workpiece W, and a tapered guide at the tip. 22
is formed.

Further, the measurement auxiliary rod 17 is used in place of the stop bar 14 after the measuring stick 8 is released from the workpiece W and the stop bar 14 is extracted from the next workpiece W. It also serves to temporarily restrain the next workpiece W.

Reference numeral 23 denotes an opening/closing plate for the extraction port 3 fixed to the mounting bracket 19 of the measurement auxiliary rod 17. When the measurement auxiliary rod 17 is retreating from the workpiece guide path 5, the opening/closing plate 23 The outlet 3 is closed by the stopper 24 so that the center line of the workpiece W matches the axis of the measuring rod 8, and the outer peripheral surface of the workpiece W on the outlet side is stopped. With the tip of the rod 17 advancing into the workpiece guide path 5 and stopping the next workpiece W, push the stopper 24 from the outer peripheral surface of the lowest workpiece W on the outlet side. The cutout passage 25 is aligned with the outlet 3, and the lowest workpiece W is taken out from the outlet 3.

Reference numeral 26 is installed at a position where the inner circumferential surface of the annular workpiece W at the lowest position is measured, that is, below the measuring part T in front of the opening/closing plate 24 in the workpiece guide path 5, and is moved up and down by compressed air or the like. A fluid cylinder for opening and closing a discharge port for a workpiece, and a piston rod 2 of this fluid cylinder for opening and closing the discharge port 26.
At the upper end of 7, there is a measurement part T in the workpiece guide path 5.
An opening/closing plug 29 is fixedly attached to a discharge port 28 formed in the bottom surface of the container so as to be able to enter and exit freely.

Further, an inclined discharge chute 30 is installed below the discharge port 28 to allow the defective workpiece W taken out from the discharge port to fall and be discharged naturally.
A small hole 31 bored in the bottom of the upper end of the workpiece guide path 31
The opening/closing plug 29 is slidably passed through the outlet 2.
8 to open and close.

Further, the opening/closing valve 29 is always biased upward by a suspension spring 32 whose upper end is attached to a part of the discharge chute 30 and whose lower end is fixed to a part of the opening/closing valve 29 to close the discharge port 28. When opening the discharge port 28, the piston rod 27 is lowered together with the stopcock 29 against the suspension spring 32, and the upper end of the stopcock 29 is placed in the workpiece guide path of the discharge chute 30. 31, the defective workpieces W are appropriately discharged from the discharge port 28 through the discharge chute 30.

33 is a first electromagnetic switching valve that operates the fluid cylinder 6 for measuring and stopping the inner diameter, 34 is a second electromagnetic switching valve that is operating the measurement auxiliary fluid cylinder 7, and 35 is a fluid cylinder 26 for opening and closing the discharge port. This is the third electromagnetic switching valve.

Further, 36 is a proximity switch for confirming the forward end position of the measuring rod 8 and the stop bar 14, 37 is a proximity switch for confirming the backward end position of the measuring rod 8 and the stop bar 14, and 38 is a proximity switch for confirming the backward end position of the measuring rod 8 and the stop bar 14.
This is a detector which is attached to the mounting bracket 10 for confirming the positions of the two proximity switches 36 and 37 and causing the two proximity switches to issue a required confirmation signal.

Further, numeral 39 is a proximity switch for confirming the forward end position of the measurement auxiliary rod 17, 40 is a proximity switch for confirming the retraction end position of the measurement auxiliary rod 17, and 41 is attached to the mounting bracket 19 of the piston rod 18, and numeral 41 is attached to the mounting bracket 19 of the piston rod 18. This is a detector for confirming the position of 40 and causing a required confirmation signal to be output from both proximity switches.

Furthermore, 42 is a proximity switch for confirming the end position of the upward movement of the stopper 29, 43 is a proximity switch for confirming the end position of the downward movement of the stopper 29, 44 is attached to a part of the stopcock 29, and the positions of both switches 42 and 43 are This is a detector for confirming that the switch outputs the required confirmation signal from both switches.

On the other hand, 45 is a timer for determining whether or not the measuring rod 8 is fitted to the inner peripheral surface of the lowest workpiece W within a predetermined time period.

Since the sorting device of the present invention is configured as described above, the acceptability of a large number of annular workpieces W placed on the workpiece guide path 5 of the supply chute 1 in the state shown in the figure is now determined by selecting the lowest rank. In order to sort things out, first, the first electromagnetic switching valve 33
At the same time, one solenoid 33a is demagnetized and the other solenoid 33b is energized, and the passage a of the switching valve 33 is closed to b.
Pressure fluid is fed into the rear chamber 6b of the fluid cylinder 6, and the piston rod 9 is advanced to cause the tip ends of the measuring rod 8 and the stop rod 14 to protrude into the workpiece guide path 5.

At this time, if the position of the measurement part T of the workpiece guide path 5, that is, the inner diameter of the lowest annular workpiece W, is normal, the tip of the stopper rod 14 is the same as that of the next workpiece W. The inner circumferential surface is slightly pushed back toward the intake port 2 side of the workpiece guide path 5 to stop it, and the tip of the measuring rod 8 is slightly delayed from the fitting of the stopper rod 14. By fitting this into the inner peripheral surface of the lowest workpiece W, it is determined that the inner diameter of the workpiece W is normal.

This confirmation is performed when the detector 3B of the mounting bracket 10 approaches the proximity switch 36 for confirming the forward end position, and
Electrical detection is possible by activating 6.

Here, in order to take out the normal workpiece W that has been determined from the workpiece guide path 5, the solenoid 33b of the first electromagnetic switching valve 33 is demagnetized by the confirmation signal from the proximity switch 36, and the other solenoid 33a is deenergized. is energized, and the passage b of the switching valve 33 is switched to the passage a again to open the fluid cylinder 6.
Pressure fluid is fed into the front chamber 6a of the machine, and the piston rod 9 is moved back to remove the tips of the measuring rod 8 and the stop rod 14 from the inner peripheral surfaces of the lowest and next workpieces.

Simultaneously with the retraction of the measuring rod 8 and the stop rod 14, the other second electromagnetic switching valve 34 is activated by a confirmation signal from the proximity switch 36.
demagnetizes the solenoid 34a, energizes the other solenoid 34b, switches passage a of the switching valve 34 to passage b, and supplies pressure fluid to the rear chamber 7b of the fluid cylinder 7,
The measurement auxiliary rod 17 and the opening/closing plate 23 are advanced together with the piston rod 18, and the tip of the measurement auxiliary rod 17 stops the inner peripheral surface of the next workpiece W in place of the stop rod 14, and From the workpiece guide path 5 to the stop portion 2 of the opening/closing plate 23
4 is removed, the cutout passage 25 is aligned with the workpiece guide path 5, and only the lowest workpiece W is taken out from the measurement section T through the takeout port 3.

After taking out the normal workpiece W after the above discrimination, the measurement auxiliary rod 17 and the opening/closing plate 23 are moved back to return to their original state. , the detector 41 of the mounting bracket 19 of the piston rod 18 activates the proximity switch 39 for confirming the forward end position, and the confirmation signal from the proximity switch 39 causes the second
The solenoid 34b of the electromagnetic switching valve 34 is demagnetized and the other solenoid 34a is energized, and the passage b of the switching valve 34 is switched to the passage a again to send pressurized fluid to the front chamber 7a of the fluid cylinder 7, and the piston rod 18 At the same time, the notch passage 25 of the opening/closing plate 23 is removed from the workpiece guide path 5, and the stopper 24 removes the tip of the measurement auxiliary rod 17 from the next workpiece W. The object guide path 5 is closed again and the next workpiece W is moved to the measurement section T in preparation for the next sorting.

On the other hand, the measuring rod 8 and the stop rod 1 in the sorting of the workpieces
If the inner diameter of the lowest annular workpiece W in the measuring section T is smaller than the allowable dimension, the tip of the measuring rod 8 will rise backwards during the forward movement of step 4. The measuring rod 8 is stopped at the inlet of the circumferential surface or bites at the inlet of the inner circumferential surface.
is prevented from advancing, and it is determined that the workpiece W is defective.

This confirmation is performed when the detector 38 of the mounting bracket 10 moves forward of the piston rod 9, and the proximity switch 38 for confirming the end position of the backward movement
The timer 45, which starts counting in response to a signal from the proximity switch 38, starts counting after a predetermined period of time, and can be detected by the timeout signal of the timer 45.

Here, in order to discharge the defective workpiece W that has been determined from the workpiece guide path 5, the solenoid 3 of the first electromagnetic switching valve 33 is activated in response to a timeout signal from the timer 45.
3b is demagnetized and the passage b of the switching valve 33 is switched to C to stop the supply of pressurized fluid to the rear chamber 6b of the fluid cylinder 6. At the same time, the rear chamber 6b and the front chamber 6a are communicated with each other, and the passage b of the switching valve 33 is switched to C. be opened to

In parallel with this switching of the first electromagnetic switching valve 33, the solenoid 35a of the third electromagnetic switching valve 35 is energized by the time-out signal from the timer 45, and the passage a of the switching valve 35 is switched to the passage b, so that the fluid cylinder 26 Pressure fluid is fed into the upper chamber 26a, and the piston rod 27 is connected to the suspension spring 3.
2 to remove the stopper 29 from the discharge port 28 of the workpiece guide path 5 and lower the upper end of the stopper to the bottom surface of the workpiece guideway 31 of the discharge chute 30.

When the opening/closing valve 29 is lowered, the detector 4 integrated with the opening/closing valve 29
2 activates the proximity switch 43 for confirming the lowering end position, the confirmation signal from the proximity switch 43 causes the second
The solenoid 34a of the electromagnetic switching valve 34 is demagnetized and the other solenoid 34b is energized, and the passage a of the switching valve 34 is switched to b to feed pressure fluid into the rear chamber 7b of the fluid cylinder 7, and the piston rod 18 and Measurement auxiliary rod 17 together
and the opening/closing plate 23 are moved forward, and the tip of the measurement auxiliary rod 17 is fitted into the inner circumferential surface of the next workpiece W.

At the same time, the tip of the measurement auxiliary rod 17 applies an impact to the tip of the opposing stop bar 14, and by slightly knocking back the stop bar 14, one end of the inner circumferential surface of the lowest workpiece W is struck. The stopped or biting measuring rod 8 is separated from the lowest workpiece W, and the next workpiece W is stopped by the measurement auxiliary rod 17 instead of the stopping rod 14.

On the other hand, the lowest workpiece W is dropped from the discharge port 28 onto the discharge chute 30 and is discharged.

In addition, in order to return the opening/closing plug 29 and the measurement auxiliary rod 17 to their original positions after discharging the defective workpiece W,
When the measurement auxiliary rod 17 hits the stop rod 14 together with the measurement rod 8, the proximity switch 39 for confirming the forward end position is activated by the detector 41 of the mounting bracket 19, so the confirmation signal from the proximity switch 39 is sent. The solenoid 35a of the third electromagnetic switching valve 35 is demagnetized, and the fluid cylinder 2
The pressure fluid being fed into the upper chamber 26a of 6 is stopped, and the stopper 29 is pulled up by the suspension spring 32 to open the outlet 2.
Close 8.

Thus, when the discharge port 28 is closed by the stopper 29, the detector 44 integrated with the stopper 29 activates the proximity switch 42 for confirming the end position of the ascent, and the confirmation signal from the proximity switch 42 causes the second electromagnetic The solenoid 34b of the switching valve 34 is demagnetized, and the other solenoid 34a is energized.

By energizing the solenoid 34a, the passage b of the switching valve 34 is switched to the passage a, the piston rod 18 is moved backward, the tip of the measurement auxiliary rod 17 is removed from the next workpiece, and the measurement auxiliary rod 17 is moved back, and the normal workpiece is machined. As in the case of sorting the objects W, the next workpiece W is moved to the measurement section T in preparation for the next sorting.

Note that a detailed explanation of the electric control circuit for operating the electromagnetic switching valves 33, 34, 35, etc. is omitted because it is not directly related to the present invention.

As described above, according to the present invention, the inner diameter of the workpieces is measured on one side near the outlet at the bottom of the feeding chute, which is inclined so that a large number of annular workpieces fall down continuously and naturally. A fluid cylinder for simultaneous restraint is installed, and the measuring rod and the restraining rod are moved forward and backward together by the fluid cylinder, and one of the restraining rods is used to restrain the inner circumferential surface of the second workpiece from the bottom. Since the other measuring rod is used to measure the inner diameter of the lowest workpiece,
Measurement of the workpiece can be carried out accurately, smoothly and easily.

In addition, a measuring auxiliary fluid cylinder is installed on the opposite side of the supply chute, facing the inner diameter measuring and stopping fluid cylinder, and the measuring auxiliary rod and the opening/closing plate of the outlet are moved forward and backward together by the fluid cylinder. In this way, one opening/closing plate is used to stop the lowest workpiece from the measuring part on the axis of the measuring rod or take it out from the take-out port, and the other measuring auxiliary rod is used to hit the stop and remove it. Since the next workpiece that is being stopped by the stopper bar is stopped instead of the stopper bar, the measurement and removal of the workpiece at the lowest order can be made more reliably, quickly and easily, and the above-mentioned If the measuring rod sticks to a lower workpiece, the measuring rod can be reliably and easily separated from the workpiece.

In addition, a discharge port for defective workpieces is drilled in the bottom of the workpiece measuring section just before the opening/closing plate at the outlet of the supply chute, and the bottom of the discharge chute installed below the discharge port is By raising and lowering the opening/closing plug that has been penetrated through it using a fluid cylinder for opening and closing the discharge port, the upper end of the opening/closing plug is moved from the bottom surface of the supply chute to the bottom surface of the discharge chute, thereby opening and closing the discharge port. The defective workpieces determined by the measuring section can be immediately, reliably, quickly and easily separated and discharged from a discharge port other than the outlet for normal workpieces.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view showing an embodiment of the sorting device of the present invention;
FIG. 2 is a cutaway side view of FIG. 1 taken along line 1 to 2 and viewed in the direction of the arrow. DESCRIPTION OF SYMBOLS 1... Supply chute, 2... Intake port, 3... Outlet port, 4... Apparatus main body, 5, 31... Workpiece guide path, 6... Fluid cylinder for internal diameter measurement and restraint, 7... Fluid cylinder for measurement assistance, 8 …
Measuring rod, 9, 18... Piston rod, W... Annular workpiece, 1
4...Stopping rod, 17...Measurement auxiliary rod. , 23...opening/closing plate, 24
...Blocking part, 25...Notch passage, 26...Fluid cylinder for opening/closing the discharge port, T...Workpiece measuring part, 28...Discharge port, 29...Opening/closing plug, 30...Shooter for discharge.

Claims (1)

[Scope of Claims] 1. A supply chute that is supported at an angle above the apparatus main body and allows the workpiece to naturally fall from an intake port at the upper end toward an output port at the lower end, and an output port of the supply chute. A fluid cylinder for measuring and restraining the inner diameter of the workpiece and a fluid cylinder for measuring the inner diameter, which are installed facing each other on the left and right near the supply chute and move forward and backward in a direction perpendicular to the workpiece guide path of the feed chute, and a fluid cylinder for measuring the inner diameter and restraining the workpiece. A measuring rod that is attached to the piston rod of the fluid cylinder for measurement and measures the inner diameter of the lowest workpiece, a stopper that stops the inner circumference of the next workpiece, and a piston rod of the measurement auxiliary fluid cylinder. a measurement auxiliary rod that is attached to the piston rod of the measurement auxiliary fluid cylinder and that hits back the stopper and stops the inner periphery of the next workpiece in place of the stopper rod; and an opening/closing plate that opens an outlet after stopping the next workpiece. 2. A supply chute that is supported at an angle above the device body and allows the workpiece to fall naturally from the intake port at the upper end toward the exit port at the lower end, and is installed oppositely on the left and right sides near the exit port of the supply chute. A fluid cylinder for measuring the inner diameter of the workpiece and a fluid cylinder for measurement assistance, which move forward and backward in a direction perpendicular to the workpiece guide path of the supply chute, and a piston rod of the fluid cylinder for measuring and restraining the inner diameter of the workpiece. A measuring rod is attached to the piston rod of the measurement auxiliary fluid cylinder and is attached to the piston rod of the measurement auxiliary fluid cylinder. A measurement auxiliary rod is attached to the piston rod of the measurement auxiliary fluid cylinder, and the measurement auxiliary rod is attached to the piston rod of the measurement auxiliary fluid cylinder. An opening/closing plate is provided to open the ejection port after stopping the workpiece, and an outlet for defective workpieces is also provided on the bottom surface of the workpiece measuring section immediately before the opening/closing plate in the workpiece guide path of the supply chute. A slanted discharge chute is installed at the bottom of the discharge port to allow the defective workpieces taken out from the discharge port to fall and be discharged naturally.
Further, an opening/closing plug that is raised and lowered by a fluid cylinder for opening/closing the discharge port disposed below is fitted in the discharge port so as to be able to move in and out through the workpiece guide path of the discharge chute. A sorting device for circular workpieces.