JPH0318124Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rotary polishing device used, for example, for polishing the end of an optical fiber connector or polishing a lens. This invention relates to a rotary polishing device with improved mounting means.

(Prior Art) Conventionally, this type of polishing apparatus has been equipped with a ring-shaped rotating frame covered with a flexible elastic polishing plate, as described in, for example, Japanese Patent Application Laid-Open No. 61-265255. Then, while rotating the polishing plate, place an optical fiber connector (hereinafter referred to as
An apparatus is known in which the lower end surface (referred to as a columnar member) is pressed against the polishing plate, and the pressing force is used to curve the polishing plate downward, thereby polishing the end surface into a convex spherical surface.

(Problem to be solved by the invention) However, according to the above-mentioned device, when the lower end surface of the columnar member is pressed against the center of the polishing plate, only the center of the polishing plate wears out quickly. Furthermore, when the lower end surface of the columnar member is pressed against the outer periphery of the polishing plate, only the outer periphery of the polishing plate is abraded in an annular shape, and in any case, the polishing plate is locally abraded and the polishing plate is damaged. The entire surface cannot be used for polishing columnar members,
There is a problem that the polishing loss area is large and the replacement cycle of the polishing plate is accelerated, which is uneconomical.

In addition, when polishing is performed by pressing the lower end surface of a columnar member into contact with the outer circumferential portion eccentric from the middle of the polishing plate, the lower end peripheral edge of the columnar member facing toward the outer circumferential edge of the polishing plate is placed closer to the center of the polishing plate. The lower end surface of the columnar member cannot be polished into a curved surface with high precision because it receives a stronger contact force than the lower end peripheral edge facing toward the columnar member.

Therefore, it is possible to rotate the columnar member, but the rotation drive mechanism becomes extremely complicated, and if the columnar member has a small diameter like the optical fiber mentioned above, the rotation may cause twisting. This has the fatal problem that the columnar member cannot be cut and used, and furthermore, even when the columnar member is rotated and revolved relative to the polishing plate, the polishing surface of the polishing plate is This still results in a ring-shaped area, and the above-mentioned problems cannot be solved.

Furthermore, the above-mentioned apparatus has a major problem in that it is not possible to polish the curved surfaces of a plurality of columnar members at the same time.

That is, when a plurality of columnar members are arranged in parallel and their lower end surfaces are pressed against a polishing plate, the portion of the polishing plate that contacts the outermost columnar member is bent along the lower end surface of the columnar member. , the polishing plate portion between the bent portions is stretched horizontally, and the flat lower end surfaces of all columnar members, including these outermost columnar members, are in contact with the horizontal surface of the polishing plate. It is from.

Furthermore, the polishing plate is attached by fitting pins protruding from both sides of the upper end surface of the ring-shaped rotating frame into elongated holes drilled radially on both sides of its outer circumference. When a columnar member is pressed against a polishing plate, the polishing plate escapes downward due to the pressing force, weakening the contact force against the columnar member to be polished, reducing the polishing ability and making the contact force uneven. There is a problem.

The object of the present invention is to provide a rotary polishing device that can solve these problems.

(Means for Solving the Problems) In order to achieve the above object, the rotary polishing device of the present invention has a plurality of concave or convex surfaces on the upper surface for polishing the lower end of the columnar member 26 to be polished into a predetermined shape. a fixing member 6 having a receiving portion 6B; a cylindrical rotating frame 8 that has the fixing member 6 disposed in the inner space and revolves around the fixed member 6 while rotating at a position eccentric to the center of the fixing member 6; an abrasive sheet 7 that is replaceably stretched over the cylindrical rotating frame 8 and has a portion of its lower surface resting on the fixing member 6;
Each columnar member 26 is attached to a position corresponding to each receiving portion 6B of the fixing member 6.
In a rotary polishing device comprising a vertical feeding device 25 that presses the lower end surface of 6 to the opposing receiving portion 6B of the fixed member 6 via the polishing sheet 7, A cylindrical holding frame 11 is arranged to be able to be tightened and unfastened to the rotating frame 8, and ring-shaped uneven portions 8A and 11A that engage with each other are formed on opposing surfaces of the rotating frame 8 and holding frame 11. The outer periphery of the polishing sheet 7 is sandwiched between these ring-shaped uneven portions 8A and 11A.

(Function) With this configuration, in order to tension the polishing sheet 7 on the cylindrical rotating frame 8, the outer circumference of the polishing sheet 7 is placed on the upper end surface of the rotating frame 8, and then the holding frame 11 is When the polishing sheet 7 is tightened onto the rotating frame 8, the ring-shaped uneven parts 8A and 11A provided on the opposing surfaces of the rotating frame 8 and the holding frame 11 engage with each other, and the outer periphery of the polishing sheet 7 is uniformly polished over the entire circumference. When the ring-shaped uneven portions 8A and 11A engage with each other while fixing,
The outer periphery of the abrasive sheet 7 is pushed into the recess by the ring-shaped convex portion, and the abrasive sheet 7 is pulled from the center in the outer radial direction to be stretched and fixed with uniform and large tension over the entire surface. That will happen.

In this state, when the cylindrical rotating frame 8 is rotated and revolved, the polishing sheet 7 stretched over the frame 8 rotates eccentrically in the horizontal direction together with the frame 8 while changing the sliding contact portion with the upper surface of the fixed member 6. I do.

When a plurality of columnar members 26 to be polished are pressed by moving the feed device 25 downward onto the fixed member 6 through the polishing sheet 7, the lower end surfaces of these columnar members 26 are pressed against the polishing sheet 7. The polishing sheet 7 is received by each receiving portion 6B of the corresponding fixing member 6, and moves in the horizontal direction while being held between the lower end surface of each columnar member 26 and the receiving portion 6B. The lower end surface of the columnar member 26 is polished into a predetermined shape while being partially deformed between the member 26 and the receiving portion 6B along the receiving portion 6B.

In this way, the polishing sheet 7 moves on the fixed member 6, which is the polishing part, while eccentrically rotating and revolving, and its polishing surface is used to polish each columnar member 26 over almost the entire area, thereby extending the sheet replacement cycle. In addition, the lower end surfaces of the plurality of columnar members 26 can be simultaneously polished into a desired shape with high precision.

Further, the plurality of columnar members 26 are moved only in the vertical direction with respect to the fixed member 6 by the feeding device 25, and each receiving portion 6B of the fixed member 6 corresponding to each columnar member 26 is moved via the polishing sheet 7. The structure is extremely simple, and there is no risk of the columnar member 26 being cut or broken.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a vertical sectional view of the main parts of a rotary polishing apparatus according to an embodiment of the present invention, and FIG. 2 is a partially cutaway plan view of FIG. 1. In these figures, 1 is a grounding frame; Reference numeral 2 denotes a fixed support shaft that is fixed and erected in an upward and downward vertical position at approximately the center position of the grounding frame 1;
A cylindrical shaft 4 is fitted and supported on the outside through thrust self-aligning roller bearings 3, 3 so that it can only rotate freely in a concentric state, and a connector chuck 5 is connected to the upper end of the fixed support shaft 2. A polishing limiting fixing member 6 having a disk shape in plan view is detachably attached. Reference numeral 7 denotes a circular abrasive sheet, which is made by adhering diamond abrasive grains or the like to the surface of a thin sheet having flexibility and elastic restoring force. The upper end is capable of vertically swinging around the horizontal horizontal axis 9, and has a shrimp metal fitting 10.
It is exchangeably stretched between the upper and lower opposing surfaces of a cylindrical holding frame 11 which is connected to the holding frame 11 so that it can be tightened and fixed via the holder, with the peripheral portion thereof being clamped and fixed.
Specifically, as shown in Figures 3 and 4,
An upward ring-shaped recess 8A is provided on the upper end circumferential surface of the rotating frame 8 at an appropriate distance in the rotation radius direction;
A ring-shaped convex portion 8A is formed, and a downward ring-shaped convex portion that engages with the ring-shaped concave portion 8A is formed on the lower end circumferential surface of the presser frame 11 opposite to the ring-shaped convex portion 8A when the presser frame 11 is in a downward swinging and tightened state. 11A and a ring-shaped concave portion 11A that engages with the ring-shaped convex portion 8A, whereby the rotating frame 8 and the holding frame 11 cover the entire circumference of the peripheral portion 7A of the polishing sheet 7 of the polishing action portion 7B. It is configured to be bent in a zigzag shape in the direction of the rotational axis relative to a plane and fixedly held. Reference numeral 12 denotes a cylindrical rotary passive member that is concentrically connected to the lower part of the rotary frame 8 via a knock pin 13, and its rotational axis a is at an angle of Δl with respect to the axis b of the fixed support shaft 2. In a deviated state,
A thrust bearing 15 is attached to the large diameter gear 14 which will be described later.
The internal gear 16 is rotatably supported through the internal step, and an internal gear 16 is concentrically fixed to the inner step. A gear 17 is fixed to the upper part of the cylindrical shaft 4, and is interlocked with the internal gear 16 via an idle gear 18. 19 is a gear fixed to the lower part of the cylindrical shaft 4, and the gear 2 meshing with this gear
The motor 21 is connected to the motor 21 fixedly supported on the pedestal 1 through the
0 and 19, the cylindrical shaft 4, and gears 17, 18, and 16 constitute an autorotation drive mechanism that drives and rotates the rotating frame 8 and the polishing sheet 7 around the axis b.

Reference numeral 14 denotes the above-mentioned large-diameter gear, which is rotatably supported by the ground frame 1 via a thrust bearing 22 around the axis a, and has a vertical through-hole 14A formed in its center; The idle gear 18 is fixed to a vertical shaft 31 that is rotatably supported by the free end of an arm 14B that projects inward. A cylindrical portion 14C that is concentric with the rotating frame 8 is integrally projected from the upper surface of the large-diameter gear 14, and a cylindrical portion 12C that is externally fitted concentrically with this protruding cylindrical portion 14C is attached to the rotation passive member 12. It is integrally formed. 2
3 is a gear that meshes with the large diameter gear 14, and is directly connected to the motor 24, so that the motor 24 and the gear 2
3. The large-diameter gear 14 and the protruding cylindrical parts 14C and 12C constitute a revolution drive mechanism that drives and rotates the rotating frame 8 and the polishing sheet 7 around the axis a.

As shown in FIG. 7, the surface of the polishing limiting fixing member 6 has a radius of curvature slightly larger than that of the convex spherical surface to be finally polished. A plurality of recesses 6B each having a concave spherical surface 6A having a radius of curvature plus the thickness are formed at appropriate intervals in the circumferential direction, and by attaching and detaching the fixing member 6, the concave spherical surface 6A has a different radius of curvature. It is configured so that it can be selected and used as desired.

25 is an example of a member to be polished. A plurality of optical fiber connectors 26 are fixedly held, and their ends to be polished are connected to each concave spherical surface 6 of the fixing member 6.
This is a polishing feeding device that presses concentrically toward the optical fiber connector 26, and it consists of a pair of upper and lower disk-shaped holding members 27, 28 that hold a flange 26A provided at the middle of the optical fiber connector 26, and a feeding shaft 29. The lower clamping member 28 is fixedly connected to the lower end of the feed shaft 29, and has a through hole 28a through which a portion lower than the flange 26A is inserted, and the upper clamping member 27 is connected to the lower end of the feed shaft 29. 29 so as to be slidable in the axial direction thereof, and is slidably biased toward the lower holding member 28 via a spring 30.

Next, the operation of the above configuration will be explained.
Figure a is a cross-sectional view of the optical fiber connector 26 before spherical polishing.
b, and insert the fiber part of the appropriate length on the connection end side into the connector body 26b.
The end face 26d is a substantially flat surface perpendicular to the axis before polishing.

While fixing and holding a plurality of optical fiber connectors 26 having the above-described structure to the polishing feeding device 25 as specified, both motors 21 and 24 are operated to move the rotating frame 8 and the polishing sheet 7 as shown schematically in FIG. As shown, it is driven to revolve around an axis a and rotate around an axis b.

In this state, when the feed shaft 29 of the feed device 25 is moved downward (in the direction of the arrow X in FIG. sheet 7
The pressed portion is deformed by being depressed into the recess 6B on the surface of the fixing member 6. Due to this concave deformation, the corner portion of the end of the optical fiber connector 26 comes into contact with the polishing sheet 7 first, as shown in FIG. 7a, and that portion is polished. As the feed shaft 29 is sequentially moved downward during such polishing, the amount of concave deformation of the polishing sheet 7 increases, and the end portion of the optical fiber connector 26 is polished in the direction of the arrow in FIG. 7a. As the polishing progresses, when the amount of concave deformation of the polishing sheet 7 reaches the maximum, that is, when the concave portion 6B of the polishing sheet 7 reaches the state shown in FIG. As shown in FIG. 6b, the end of the optical fiber connector 26 is polished into a convex spherical surface 26e.

Note that when the optical fiber connector 26 is unprocessed, the optical fiber 26a may protrude slightly from the end surface, and a portion of the adhesive present at the bonded portion with the connector body 26b may protrude from the end surface. In this case as well, the protruding portion from the end face is polished together with the other portions, and the final result is a convex spherical surface.

In addition, the end face polishing of the optical fiber connector 26 is
The method is not necessarily limited to the above method, and for example, by pressing the polishing sheet 7, the sheet 7 is supported on the periphery of the concave portion 6B, and the concave spherical surface 6 is formed.
If the end face of the optical fiber connector 26 is deformed into a concave shape without being able to follow the line A, that is, even if the end face of the optical fiber connector 26 is polished along the flexure using the flexure of the polishing sheet 7, the desired convexity will not be achieved. A spherical surface 26e can be obtained. In this case, a through hole may be formed instead of the recess 6B.

During the above-described spherical polishing, since the polishing sheet 7 rotates and revolves around its own axis, the polishing action area of one polishing sheet 7 can be widened, and the length of action time until replacement is required, that is, polishing of a certain area. This allows for a longer seat replacement cycle. In addition, during the polishing action as described above,
The tensile stress caused by the pressing of the optical fiber connector 26 progresses from the center of the polishing sheet 7 toward the outer periphery.
By receiving the polishing material evenly over substantially the entire circumference of the sheet 7, local damage, deformation, and changes in tension of the sheet 7 can be suppressed, and a predetermined polishing performance can be stably maintained.

In the above embodiment, an optical fiber connector is used as the member to be polished, and the end portion thereof is polished into a convex spherical surface.
End faces of columnar members other than optical fiber connectors can be polished in the same manner, and the receiving part provided on the fixing member 6 for polishing the end faces is formed in the recess 6B, but as described above. It may be a through hole, or it may be formed as a convex portion, and the lower end surface of the columnar member 26 may be polished into a concave surface.

Furthermore, as shown in the above embodiment, the rotational drive mechanism and the revolution drive mechanism are stored and arranged in these spaces by effectively utilizing the space within the cylindrical rotating frame 8 and the space within the frame 1 below the frame 8. By adopting such a structure, it is possible to downsize the entire device, but the present invention is not limited to this structure.

(Effect of the invention) As described above, according to the invention, the fixing member 6 has a plurality of receiving portions 6B such as concave or convex surfaces on the upper surface for polishing the lower end surface of the columnar member 26 to be polished into a predetermined shape. Then, the columnar members 26 to be polished are attached to positions corresponding to the respective receiving portions 6B of the fixing member 6, and the lower end surfaces of the columnar members 26 are pressed against the opposing receiving portions 6B of the fixing member 6 in the vertical direction. Since the abrasive sheet 7 stretched between the feeding device 25 and the cylindrical rotating frame 8 is moved while being eccentrically rotated and revolved, the abrasive sheet 7 is in sliding contact with the upper surface of the fixed member 6. Since the polishing surface of the sheet 7 can be used for polishing the plurality of columnar members 26 over almost the entire area, it is possible to polish almost the entire surface of the polishing sheet 7 evenly. It is extremely economical to use as it can be worn out and the sheet replacement cycle can be extended.

Furthermore, by moving the feeding device 25 downward, the polishing sheet 7 is pressed by the lower end surfaces of the plurality of columnar members 26 to be polished, and the lower ends of the columnar members 26 are moved to the respective receivers of the corresponding fixing members 6. Not only can the polishing sheet 7 be reliably received by the portion 6B, but also the polishing sheet 7 that slides on the fixing member 6 while being held between the lower end surface of each columnar member 26 and the receiving portion 6B of the fixing member 6. , these columnar members 26 and the receiving portion 6
B, the lower end surfaces of the plurality of columnar members 26 can be polished simultaneously into a predetermined shape with high accuracy and uniformity by partially deforming along the receiving portion 6B, and the polishing efficiency of the columnar members 26 is significantly improved. It is something that can be done.

Further, a cylindrical holding frame 11 is disposed on the cylindrical rotating frame 8 so as to be able to tighten and release the tightening from the rotating frame 8, and the rotating frame 8 and the holding frame 11 engage with each other on opposing surfaces. Since the ring-shaped uneven parts 8A and 11A are formed so that the outer periphery of the polishing sheet 7 is held between these ring-shaped uneven parts 8A and 11A, the cylindrical rotating frame 8
When the abrasive sheet 7 is stretched, the outer circumference of the abrasive sheet 7 is placed on the upper end surface of the rotary frame 8, and then the presser frame 11 is tightened onto the rotary frame 8, so that the rotary frame 8 and the presser The ring-shaped uneven portions 8A, 11A provided on the surface facing the frame 11 engage with each other to uniformly fix the outer periphery of the polishing sheet 7 over the entire circumference, and the ring-shaped uneven portions 8A, 11A
When the two mesh together, the outer periphery of the abrasive sheet 7 is pushed into the recess by the ring-shaped convex part, which generates a tensile force in the abrasive sheet 7 from the center toward the outer diameter, creating a uniform and large tension over the entire surface. It can be tensioned and fixed with a tensioner, and can reliably prevent a decrease in tension, local deformation, and damage.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the main parts of a rotary polishing device according to an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG. 3 is an enlarged longitudinal sectional view of the main parts. Fourth
The figures are a sectional view taken along the line of Fig. 3, Fig. 5 a schematic plan view explaining the movement of the polishing sheet, and Fig. 6.
Figures a and b are cross-sectional views before polishing and after polishing of an optical fiber connector as an example of the polishing target, and Figures 7a and b are explanatory diagrams of the polishing action. 7... Polishing sheet, 8... Rotating frame, 11... Holding frame, 8A, 11A... Ring-shaped occlusion part.

Claims (1)

[Scope of utility model registration request] A fixing member 6 having a plurality of receiving portions 6B such as concave or convex surfaces on the upper surface for polishing the lower end surface of the columnar member 26 to be polished into a predetermined shape; A cylindrical rotating frame 8 revolves while rotating at a position eccentric to the center of the fixed member 6, and a cylindrical rotating frame 8 is attached to the cylindrical rotating frame 8 so as to be replaceable, and a part of its lower surface is placed on the fixed member 6. The polishing sheet 7 disposed in a stationary state and the columnar members 26 to be polished are attached to positions corresponding to the respective receiving portions 6B of the fixing member 6, and the lower end surface of each columnar member 26 is polished through the polishing sheet 7. In the rotary polishing device, there is provided a cylindrical presser on the cylindrical rotating frame 8 against the rotating frame 8. Ring-shaped uneven portions 8A, 1 are arranged to allow the frame 11 to be tightened and unfastened, and the rotating frame 8 and the holding frame 11 engage with each other on opposing surfaces thereof.
1A, and the outer periphery of the polishing sheet 7 is sandwiched between these ring-shaped uneven parts 8A and 11A.