JP2610923B2 - Optical fiber connector processing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an apparatus for processing an optical fiber connector into a conical surface and a distal end surface.

BACKGROUND OF THE INVENTION Optical fiber connectors are used to optically couple optical fibers in optical communications or optical sensors. At the time of this optical coupling, the joint-side end face of the optical fiber is processed into a convex spherical surface or a convex aspherical surface at the stage of field connection in order to minimize optical coupling loss.

In such a spherical processing, according to a certain processing method, a flat surface of an optical fiber is first ground into a conical surface, and then a final spherical surface is finished by polishing in a subsequent stage.

2. Prior Art The patent applicant has already developed an apparatus suitable for such processing. While rotating the grindstone at a high speed, the apparatus presses the processing-side end face of the optical fiber connector against the grindstone surface, gives reciprocal rotation in the axial direction to the optical fiber connector, and moves the axis of the optical fiber connector to the grindstone surface. By inclining at a predetermined angle with respect to the normal direction, the connection-side end surface of the optical fiber connector is processed as a conical surface.

The motor functions required for such processing are already sufficiently fulfilled by the proposed device.

However, from the viewpoint of the required motor function, the above-mentioned device is in a completed state, but has not yet been a reasonable configuration capable of mass production.

Therefore, the object of the present invention is to simplify the structure of the entire device while basically following the motor function of the conventional function,
The aim is to simplify the design and processing of each mechanical element while reducing the size and weight, and to achieve a rational structure for mass production and practical use.

Therefore, the present invention provides a high-speed rotary motion of a grindstone driven by a first motor, and a reciprocal rotary motion of an optical fiber connector to be processed is separately generated by a dedicated second motor. While the rotational motion of the first motor is reduced by a worm gear train or the like, the cam mechanism converts the rotational motion into an advance / retreat motion of the grindstone and a pivotal motion of a portion supporting the optical fiber connector in a chucking state, that is, a swing lever. .

In this way, the necessary motion functions are provided in a rational manner by the two motors and the cam mechanism, etc., so that this processing device is smaller, lighter and simpler than the already developed device. As a practical machine that can be mass-produced, it is in a state that is convenient to carry around and is in a form that is easy to actually use on site.

First, FIGS. 1 to 6 show the overall configuration of an optical fiber connector processing apparatus 1. FIG.

In order to finish the flat processing-side end face of the optical fiber connector 2 into a conical shape, the processing apparatus 1 has a slider 4 and a swing lever 5 on a machine base 3 and a first motor 51 and a second motor 51 as driving sources. The motor 96 is provided.

As shown in FIGS. 3 and 5, the slider 4 is hollow, and fits on a rectangular groove-shaped guide 7 on a part of the support portion 6 of the machine base 3 with a rectangular ridge. The grindstone shaft 9 is rotatably supported by bearings 8 at the front, rear, and intermediate positions in the horizontal direction.
The tip of the slider 4 faces a processing chamber 10 formed integrally with the machine base 3 with a sealing material 11 interposed therebetween.

As shown in FIG. 3, the grinding wheel shaft 9 holds a disk-shaped grinding wheel 12 at a tip end portion in a detachable state with a mounting screw 13. In addition, although the processing chamber 10 forms an opening on the side surface facing the grindstone 12, in preparation for attaching and detaching the grindstone 12,
This opening is closed by a transparent collar 14.

As shown in FIG. 3, the front and rear bearings 8 are prevented from falling off by a bearing retainer 15 on the slider 4 side and a retaining nut 16 screwed into the grinding wheel shaft 9.
The bearing retainer 15 forms a hermetically sealed portion together with the labyrinth seal 17 inside the processing chamber 10 and holds a positioning portion 18 at the upper end thereof.

This positioning portion 18 is provided side by side with the grindstone 12,
When viewed in plan, as shown in FIG. 7, it is generally U-shaped, and as shown in FIG.
Thus, it is held in a vertically movable state with respect to the guide hole 20 on the bearing presser 15 side, and is always urged in the floating direction by a spring 21 at an intermediate position, and
On the side, against two stop screws 22. And
The upper surface of the positioning portion 18 serves as a reference surface 23 for positioning, and has a semicircular flute 24 as necessary.

On the other hand, the rear end portion of the grindstone shaft 9 is connected to the spline shaft 25 in a fitted state as shown in FIG. 3, and fitted to the spline cylinder 26 at this portion. The spline cylinder 26 has a pulley 29 integrally formed at one end thereof.
It is rotatably supported by a block unit 30 which is integral with the unit. The rear end portion of the slider 4 is separated by a separate cam abutting member 33 into a first eccentric type cam for grinding wheel feed.
It is in contact with the outer periphery of 31 and is constantly urged in the retreating direction by a compression spring 34 between this portion and the outer wall surface of the processing chamber 10.

As shown in FIG. 6, the first cam 31 is fixed to a horizontal cam shaft 36 together with the second cam 32 for cutting and the cam 35 for setting. This camshaft 36
Is rotatably supported by the left and right bearings 37 and the bearing flanges 38 with respect to the block portion 30, and holds a dog 40 corresponding to a limit switch 39 for one-rotation stop control at one end. I have. The second cam 32 and the setting cam 35 have contour curves as shown in FIGS. 9 and 10, respectively, and the contour portions are applied to the rollers 43 and 44 of the intermediate shafts 41 and 42, respectively. Touching each other. Both of the intermediate shafts 41 and 42 are slidably fitted in the guide holes 45 and 46 of the block portion 30 in the vertical direction, and abut on the lower ends of the adjusting screws 49 and 50 on the swing lever 5 side at the upper end.

Next, the first motor 51 will be described with reference to FIGS.
As shown in the figure, the motor shaft 53 is attached horizontally to a bracket 52 integral with the machine base 3.
Is connected to the worm shaft 55 by a shaft coupling 54.
The worm shaft 55 is provided with a gear case 56 integrated with the machine base 3.
On the other hand, it is rotatably supported by the bearing 57,
The rotation of the motor shaft 53 is controlled by the large pulley 58 and the belt at the other end.
The speed is transmitted to the small pulley 29 via 59 while increasing the speed. The worm 60 of the worm shaft 55 is
The worm 63 of the intermediate shaft 61 is further engaged with the worm wheel 65 of the intermediate shaft 64.
Are engaged. The intermediate shafts 61 and 64 are rotatably supported in a predetermined direction with respect to the gear case portion 56 by bearings 66 and 67 and bearing flanges 68 and 69 at both ends, respectively. Finally, the rotation of the intermediate shaft 64 is transmitted to the large gear 71 at one end of the camshaft 36 by the small gear 70 at the tip end as shown in FIGS.

Further, as shown in FIGS. 1 and 3, the swing lever 5 is pivotally moved at an intermediate position with respect to a bearing block 73 above the processing chamber 10 by a horizontal fulcrum shaft 72 and a bearing 72a. It is freely supported, and a chuck 76 is rotatably supported by upper and lower bearings 75 inside a housing 74 at the distal end. The lower end of the housing 74 has an opening 10a of the processing chamber 10 with a packing 74a interposed therebetween.
Is facing.

This chuck 67 is, for example, of a collet type, and as shown in FIG. 11, a collet sleeve 77 fitted to the bearing 75, and a center position of the collet sleeve 77,
It is slidable in the axial direction, that is, in the vertical direction, and the pin 77
It is composed of a collet 78 in a non-rotating state by a. The collet sleeve 77 is fitted into the center hole of the pulley 80 by, for example, a screw, and is fitted inside the lock nut 81 in a state allowing rotation. In addition, this pulley 80
The lock wheel 79 is fitted to the lock wheel 79 in a detented state. Also, the upper end of the collet 78 and the lock nut
The outer peripheral portion of 81 is connected to each other by a screw pair 83. Further, the lock nut 81 is connected to the lock dial 84 at the upper end portion by a set screw 85 so as not to rotate. The lock dial 84 faces the inside of an annular groove 87 formed on the upper surface of the pulley 80 at the lower regulating pin 86, and hits the stop pin 82 before completely rotating once. It does not rotate relative to the pulley 80 more than one rotation.

Further, as shown in FIG. 12, the lock wheel 79 can be fitted to the rotation preventing pin 88 at a tooth groove portion. The detent pin 88 is slidable in the axial direction with respect to a holder 89 attached to the side surface of the swing lever 5 and is urged in a retreating direction by a spring 90. Is in contact with
The eccentric cam 91 is fixed to a handle shaft 92, and rotates 180 degrees by rotating the handle 93. In addition,
At this time, the rotation is restricted by the contact relationship between the stopper pin 94 of the handle 93 and the stopper 95 on the holder 89 side.

The check 76 is driven by a second motor 96. That is, the second motor 96 is a reversible motor, for example, a stepping motor. As shown in FIGS. 3 and 5, the second motor 96 faces upward with respect to the lower surface of the swing lever 5 behind the fulcrum shaft 72. The pulley 98 is mounted in a state, and is fixed to the motor shaft 97. The pulley 98 can transmit rotation to the pulley 80 by the round belt 99. This second motor 96
, The center of gravity of the swing lever 5 is
It is closer to the rear end. The rear end portion of the swing lever 5 is in contact with the upper surfaces of the intermediate shafts 41 and 42 by adjusting screws 49 and 50 as shown in FIG. These adjustment screws 4
Reference numerals 9 and 50 are used to adjust the mounting position of the chuck 76 and the amount of cut by adjusting the amount of screwing into the swing lever 5.
It is tightened and fixed by 48.

First, at the stage before the grinding, the cam contact body 33 is moved to the first cam 31.
The slider 4 is stopped at the maximum forward position, that is, the original position, as shown in FIG. At this time, the reference surface 23 of the positioning portion 18 is
It faces below the center of 76. At this time, the positioning part
The spring 18 is urged in the floating direction by a spring 21 and is separated from the upper surface of the grindstone 12, that is, the grindstone surface.

In this state, the roller 44 of the intermediate shaft 42 is moved as shown in FIG.
Since the adjusting screw 50 is pushed up on the upper surface of the intermediate shaft 42 in contact with the reference height portion 35a of the setting cam 35, the tip of the swing lever 5, and therefore the height of the chuck 76, Above, and can be adjusted by turning the adjusting screw 50. At this time, the adjusting screw 49 and the intermediate object 41 are separated from each other.

Next, the operator operates the handle 93 to release the eccentric cam 91.
By rotating by 180 degrees, the detent pin 88 is fitted into the tooth portion of the lock wheel 79, and the chuck 76 is detented.

Thereafter, an automatic insertion machine or an operator inserts the optical fiber connector 2 to be processed into the center hole of the collet 78, and as shown in FIG. 14 and FIG. The end face is pressed against the reference surface 23 of the positioning portion 18, the positioning portion 18 is lowered against the spring 21, and the lock dial 84 is rotated in the tightening direction in a state where the positioning portion 18 is in contact with the grindstone surface of the grindstone 12. As a result, the collet 8 moves upward, so that the collet 78 is deformed in the diameter reducing direction by the tapered surface of the collet sleeve 77, and holds the outer peripheral portion of the ferrule 2a of the optical fiber connector 2. In this manner, the processing-side end surface of the optical fiber connector 2 is relatively associated with the grinding wheel surface of the grinding wheel 12, and is positioned so as to be always constant regardless of the degree of wear of the grinding wheel surface. The adjustment of the grinding amount can be performed by moving the adjusting screw 50 forward and backward, and the advancement increases the grinding amount.

Note that the positioning portion 18 is guided only in the vertical direction while always maintaining the same posture by the two guide pins 19 and the guide holes 20, so that the positioning portion 18 does not incline even when it is in contact with the grindstone surface. Further, in the reference surface 23, a recess groove 24 is formed,
The outer peripheral side of the processing side end face of the optical fiber connector 2 is the reference plane 23.
Therefore, the positioning accuracy of the optical fiber connector 2 is not affected even if an adhesive or the like adheres to the central portion of the processing-side end surface.

In this manner, the optical fiber connector 2 is relatively fixed to the grindstone surface of the grindstone 12 at a fixed distance from the chuck 76 of the swing lever 5 while being positioned in the height direction.

After such a reference operation, the first motor 51
And the second motor 96 is started. At this time, the second motor 96 repeats the reciprocating rotational movement within a predetermined rotation angle range, and transmits the reciprocal rotational movement to the chuck 76 via the pulley 98, the round belt 99, and the pulley 80. As a result, the check 76 is fixed with the optical fiber connector 2 fixed.
At 360 degrees or more, the allowable range of twist of the optical fiber 2b, for example, 400
Perform a reciprocating rotation of about degrees.

On the other hand, the rotation of the first motor 51 is controlled by the pulley 58 and the belt 59.
The rotation is transmitted to the grindstone 12 via the spline shaft 25 and the grindstone shaft 9 as high-speed rotation. The rotation of the motor shaft 53 is reduced by a worm gear train or the like and transmitted to the cam shaft 36 as a time required for completing one processing cycle, for example, as one rotation per minute. In the course of one rotation of the cam shaft 36, the first cam 31 for reciprocating movement
Cooperates with the compression spring 34 to move the slider 4 backward during the first half rotation and move forward in the second half rotation. After all, whetstone 12 rotates at high speed,
By returning and moving forward as a feed motion together with the slider 4 during one machining cycle, the slider 4 returns to the original position.

Similarly, during one processing cycle, both the second cam 32 and the setting cam 35 make one rotation. In this rotation process,
When the roller 44 is disengaged from the reference height 35a of the cam 35, the adjustment screw 49 is lowered until it comes into contact with the upper surface of the intermediate shaft 41, so that the chuck 76 once rises and the processing-side end face of the optical fiber connector 2 is processed. Is separated from the reference surface 23 of the positioning section 18. As described above, since the second cam 32 acts substantially in place of the cam 35, the swing lever 5 follows the contour of the cam 32 by the gravity effect of the center of gravity near the rear end of the swing lever 5 itself. If the gravitational action is insufficient, the swing lever 5 may be urged at the rear end in a direction in which it comes into contact with the cam 35.

By the way, as shown in FIG. 9, the second cam 32 for cutting can be used to swing the swing lever 5 up to a rotation angle of 30 degrees.
By pushing up the rear end of the optical fiber connector 2, the optical fiber connector 2 on the front end side is rapidly lowered, and the grinding wheel 12 is attached to the optical fiber connector 2 within a rotation angle of 30 ° to 120 ° as shown in FIG. The rough grinding is performed by giving a cut amount in the direction of pressing while being inclined to the outer peripheral surface, that is, the grindstone surface, and the finish grinding is performed by reducing the cut amount of the optical fiber connector 2 in a rotation angle range of 120 to 210 degrees. Go on. When the second cam 32 rotates to a rotation angle of 210 degrees, the optical fiber connector 2 is in a spark-out state, continues up to 270 degrees, rises in the remaining rotation angle range, and separates from the grindstone surface while returning to the original position. Return to position.

At the end of processing, when the roller 44 comes into contact with the reference height portion 35a of the setting cam 35 again, the check 76 suddenly descends from the ascending position to lightly move the processed optical fiber connector 2 onto the upper surface of the reference surface 23. Make contact. Thus, a series of grinding processes is completed. During this time, the optical fiber connector 2 makes a locus movement as shown in FIG. Of course, since the cams 31, 32, and 35 are co-rotating with the cam shaft 36, the grinding wheel 12 moves backward during the initial half rotation of the first cam 31, and the optical fiber connector 2
However, during the subsequent half rotation, the grindstone 12 comes into contact with the processing-side end face of the optical fiber connector 2 while moving forward.

In this manner, during one processing cycle, the second cam 32 for cutting pushes up the rear end portion of the swing lever 5 overcoming the gravitational action of the center of gravity near the rear end and pushes up the swing lever 5 in the elevation direction. Repeats one rotation of
As shown in FIG. 18, the optical fiber connector 2 is pressed against the grindstone surface of the grindstone 12 while being inclined at a predetermined angle on a vertical plane with respect to the normal of the grindstone surface of the grindstone 12. Therefore,
The amount of grinding of the processing-side end face of the optical fiber connector 2 gradually increases from the center to the outer circumference of the optical fiber connector 2 so as to finally become a conical surface.

In the process of setting the inclination angle, the lift of the second cam 32 for cutting is reduced to about 1 / 3.5 of the arm length centering on the fulcrum shaft 72. The setting of the angle and the cutting amount are not directly controlled by the processing accuracy of the contour curve of the second cam 32, and can be performed with high accuracy. The conical angle at this time can be arbitrarily set by turning the adjusting screw 49 in either direction. Of course, this only needs to be adjusted once.

In this manner, the optical fiber connector 2 performs one rotation on the vertical plane during one processing cycle while repeating reciprocating rotation with respect to the grindstone surface of the grindstone 12, so that the ferrule 2a and the center position The processing-side end surface of the optical fiber 2b is finally ground as a conical surface as shown in FIG. One reciprocating rotation of the optical fiber connector 2 is 1
Since the rotation of the optical fiber connector 2 is set to a high rotation speed while the rotation is performed once during the processing cycle, the center line of the conical surface of the optical fiber connector 2 after processing is always the axis of the optical fiber 2b. The apex of the conical surface coincides with the center line of the optical fiber 2b, that is, the center of the optical axis with high precision.

Thus, when one machining cycle is completed, the dog
Since the switch 40 contacts the limit switch 39, the sequence controller (not shown) receives the signal and completes a series of machining cycles, and the first motor 51 and the second motor 96
To stop automatically. Of course, during this grinding process,
An appropriate grinding fluid is supplied to the grindstone surface of the grindstone 12 as needed. According to an experiment conducted by the patent applicant, ordinary water is sufficient for the grinding fluid, and it is sufficient to store the grinding fluid inside the processing chamber 10 in a state of touching the lower end surface of the grindstone 12.

When a large number of optical fiber connectors are continuously processed, the grindstone surface of the grindstone 12 is worn and becomes uneven.
For this reason, at an appropriate time, a correction work such as dressing of a grinding wheel or shaping of a grinding wheel is required. If such a correction operation is repeatedly performed, the outer diameter of the grindstone 12 always changes in the direction of reduction.

However, in this embodiment, even if the outer peripheral surface of the grindstone 12 changes, in the process of fixing the optical fiber connector 2 inside the chuck 76, the positioning portion 18 always hits the grindstone surface of the grindstone 12, Since the optical fiber connector 2 is relatively positioned in relation to the outer diameter, there is no need to adjust the positioning reference position of the optical fiber connector 2 in response to a change in the outer peripheral surface of the grindstone 12. As a result, the cut amount of the optical fiber connector 2 is always constant even in many processing steps.

Modified Example of the Invention In the above embodiment, the positioning portion 18 is provided so as to be displaceable in the height direction, and a part of the positioning portion 18 is brought into contact with the grindstone surface of the grindstone 12 when the optical fiber connector 2 is positioned. The positioning amount of the optical fiber connector 2 is adjusted according to the change in the outer diameter of the grindstone 12.

However, the positioning portion 18 may be provided fixed to the bearing retainer 15. In this case, even when the grinding wheel surface of the grinding wheel 12 changes in the diameter reducing direction, if the optical fiber connector 2 is positioned by the fixed reference surface 23 in the same manner as before the grinding wheel 12 is worn, the optical fiber connector 2 , The cutting depth gradually decreases. For this reason, after the grindstone 12 is corrected, readjustment is required for positioning.

 FIG. 20 shows an example of the adjusting mechanism 100.

According to this example, the rear end portion of the swing lever 5 can be brought into contact with the adjustment screw 50 on the intermediate shaft 42 side by the contact body 101. The contact body 10 is rotatably supported on the swing lever 5 at an axial portion, and a setting contact surface 102 and an adjustment contact surface 103 are respectively formed at a semicircular portion on the lower surface side. It is formed in a smooth step shape. The upper end of the contact body 101 is integrated with an adjustment knob 104 that can rotate above the swing lever 5. In addition,
The adjustment knob 104 is restricted by the annular groove 105 of the swing lever 5, the contact pin 106, and the restriction pin 107 on the adjustment knob 104 side so that it can rotate only within a range of 180 degrees. The step between the contact surface 102 for setting and the contact surface 103 for adjustment is equal to the cut amount of the second cam 32 for cutting.

At the time of adjustment, first, the optical fiber connector 2 for test is ground on the modified grinding wheel 12 in the same positioning state as before the modification, and is left attached to the chuck 76 in that state. At the time of the subsequent adjustment, the lock nut 48 'is loosened, and the adjustment screw 50 is lowered by screwing it into the intermediate shaft 42. Then, the adjustment knob 104 is turned 180 degrees, and the adjustment contact surface 103 is In this state, the adjustment screw 50 is returned to face the upper end, and the adjustment contact surface 103 is adjusted.
To eliminate the space between the adjusting screw 50 and the adjusting contact surface 103. In this state, tighten the lock nut 48 to fix the adjustment screw 50, and then turn the adjustment knob 104 to the original position by 180 degrees so that the setting contact surface 102 is
And correspond. In this way, a space is provided between the processed optical fiber connector 2 and the reference surface 23 of the fixed positioning portion 18 by the step difference between the setting contact surface 102 and the adjustment contact surface 103. . Since the new optical fiber connector 2 is positioned in the lowered state at the time of the next chucking by the amount of this space, the subsequent cut amount is always constant irrespective of the wear of the grindstone 12 by the lowered amount. .

Effects of the Invention According to the present invention, the following specific effects can be obtained.

First, the high-speed rotational movement of the grinding wheel, the reciprocating movement of the slider, and the rotational movement of the swing lever are obtained by the rotation of one motor, so that their movements are reliably synchronized. High-precision conical grinding can be performed on the side end surface.

Further, since such a necessary movement is converted from the rotational movement by the cam mechanism, a complicated three-dimensional mechanism is not required, and the structure can be simplified. For this reason, the whole device can be assembled in a small size and manufactured in a form that is convenient for carrying. In addition, when using this processing apparatus, a power source and a grinding fluid such as water are sufficient, so that the processing apparatus can be easily used even at a site where an optical fiber connector is laid, and is suitable as a processing machine for the site.

In particular, the processing device of the present invention has the necessary mechanical elements rationally arranged as compared with the proposed processing device, and furthermore, the required complex motion can be obtained by each simple movement, The size and weight of the entire apparatus can be reduced, and the function as a practical machine can be enhanced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an optical fiber connector processing apparatus, FIG. 2 is a horizontal sectional view of a part of the apparatus, FIG. 3 is a vertical sectional view of the apparatus viewed from the front, and FIG. FIG. 5 is a vertical sectional view at a different position viewed from the side, FIG. 6 is a vertical sectional view at a different position viewed from the side, and FIG. 8 is an enlarged vertical sectional view of the positioning section, FIG. 9 is an enlarged contour view of the second cam, FIG. 10 is an enlarged contour view of the positioning cam, and FIG. 11 is an enlarged view of the chuck. Sectional view, Fig. 12 is a cross-sectional view of the detent part of the chuck, Figs. 13 to 17 are explanatory views of the processing state, Fig. 18 is an explanatory view of movement during processing, Fig. 19 is an enlarged view during processing. FIG. 20 is a sectional view of the adjusting mechanism. DESCRIPTION OF SYMBOLS 1 ... Processing apparatus 2, ... Optical fiber connector 3, ... Machine stand 4, ... Slider 5, Swing lever, 9 ... Grinding stone shaft, 12 ... Grinding stone, 15 ... Bearing holder, 18 ... Positioning part, 23 ... Positioning reference plane, 31 ... First cam, 32
… Second cam, 35… Set cam, 41, 42… Middle shaft, 43, 44… Roller, 49, 50… Adjustment screw, 51…
First motor, 55 worm shaft, 60, 63 worm, 62, 65 worm wheel, 72 fulcrum shaft, 76
... Chuck, 96 ... Second motor, 100 ... Adjustment mechanism.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tadao Saito 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Inventor Toshiro Doi 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Within Telegraph and Telephone Co., Ltd. (72) Inventor Kazuo Matsunaga Within Nippon Telegraph and Telephone Corporation, 1-6-1, Uchisaiwai-cho, Chiyoda-ku, Tokyo (56) References JP-A-58-202769 (JP, A) JP-A-64- 5762 (JP, A)

Claims (1)

(57) [Claims] 1. A slider for rotatably supporting a grindstone having a cylindrical grindstone surface, a positioning portion of an optical fiber connector provided side by side with the grindstone on the slider, and a first reciprocating slider for reciprocating in the rotation axis direction. A cam, a swing lever rotatably supported in the direction of the grindstone surface, rotatably supporting the chuck in opposition to the grindstone surface, a second cam for reciprocatingly rotating the swing lever, and a swing lever provided on the swing lever. A second motor for reciprocating rotation, a cam shaft on which the first cam and the second cam are fixed, a means for worm-reducing the rotation of the first motor and transmitting the rotation to the cam shaft; Means for transmitting rotation to a grindstone. An apparatus for processing an optical fiber connector.