JPS5858187B2 - End face polishing machine for rod-shaped members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for uniformly polishing the end face of a rod-shaped member, and more specifically, it is an end-face polishing machine for a rod-shaped member that can be carried and used in any location and that can precisely polish the end face of a rod-shaped member. The present invention relates to a polishing machine that can easily polish the end faces of rod-shaped materials, particularly optical fiber cables used in optical communications, connectors, etc.

Optical fiber cables must have mutual misalignment tolerances at their connections to an accuracy of a few μP, so it is necessary to precisely polish the joint surfaces.
Moreover, it has become necessary to perform the polishing with high accuracy and speed at all locations where cable wiring is to be carried out.

However, conventionally, there is no polishing machine that satisfies the above requirements, and the current situation is that there is no other way than to always rely on the polishing machine in the factory.

In addition, although the polishing machines commonly used in the past are large, the work axis and the wheel axis correspond to each other, so it is necessary to ensure parallel adjustment of the work axis and the wheel axis. It was a very difficult task to achieve good accuracy.

In view of this point, the present inventor has previously proposed a portable polishing device.

In other words, the work shaft on which the grindstone is installed and the wheel shaft are installed on the same axis, and the work shaft is installed on the same axis so as to be rotatable and swingable relative to the eccentric wheel shaft, and the material to be polished is installed on the work shaft. The basic idea is that the work shaft containing the material to be polished is brought into contact with the grindstone by its own weight.

However, this polishing machine had the following drawbacks.

In other words, since rotation and eccentric movement are performed on the same axis, the structure becomes complicated.

In addition, since there is only one shaft, when performing rough to finish polishing or arbitrary polishing, the conditions of the grinding wheel need to be changed and the grinding wheel must be replaced each time. I had to check the angle.

The present invention was developed with the intention of solving the above-mentioned drawbacks, and the present invention will be explained in detail below based on the drawings.

FIG. 1 is a plan view of the polishing machine of the present invention, and FIGS. 2 to 4 are side sectional views thereof.

In these figures, 1 indicates a casing, and this casing 1 is partitioned by an upper support 1a and a lower support 1b to support and house a polishing mechanism including drive motors M-1 and M-2. 1 is equipped with a lid 2.

3 indicates a swing axis provided approximately at the center of the housing 1;
This swing shaft 3 is fixed to the upper support 1a of the housing 1 and the lower support 1b.
It is rotatably installed in a sleeve 4 extending in the direction.

The upper end of the swing shaft 3 is extended above the upper receiver 1a.

Moreover, the eccentric pin 5 is integrally formed.

Further, a gear 6 is fixed to the lower end of the swing shaft 3, and this gear 6 is connected to a motor M-
It is linked to 1.

7 is an upper support 1a and a lower support 1b adjacent to and parallel to the swing shaft 3.
This wheel shaft 7 is rotatably attached to a sleeve 8 fixed to the upper receiver 1a via a ball bearing 9, and its upper end is attached to the sleeve 8 fixed to the upper receiver 1a. Also formed is a flat surface 7a which is exposed upward and has a T-shaped cross section.

A grindstone or a lapping machine 10 (hereinafter simply referred to as a grindstone) is fixed to the flat surface 7a of the wheel shaft 7.

Also, two gears 11 are provided at the lower end of the first wheel shaft 7.
12 is fixed, and one gear 11 is the lower support 1 of the housing 1.
The other gear 12 meshes with the gear 6 of the swing shaft 3 mentioned above.

14 and 15 are second and third wheels provided on a circumference that passes through the center of the first wheel shaft 7, with the swing shaft 3 as the center.
A grindstone 10 is installed with the same configuration as the first wheel axis, but it is driven by a motor M-1 serving as its drive source and another drive motor M-2.

In other words, the second. Gears 16 and 17 provided at the lower end of the third wheel shaft 14 and 15 mesh with motor gears 18 of a drive motor M-2 installed on the lower surface of the lower support 1b of the housing 1, respectively.

The drive motors M-1 and M-2 have different torques and different rotational speeds. For example, the polishing by the first wheel shaft is rough polishing, and the polishing by the second and third wheel shafts is medium polishing. Served as polishing and finishing polish.

Therefore, the grindstones 10 installed on each of the wheel shafts 7, 14 and 15 are different depending on the type of grinding.

Incidentally, the upper end eccentric pin 5 of the swing shaft 3 projects above the surface of the grindstone 10 installed at the upper end of each of the wheel shafts 7, 14, 15.

20a, 20b, and 20c are sliding bearings, and each sliding bearing is fixed to the upper bearing 1a of the housing 1, facing each of the wheel shafts.

That is, each of the bearings 20a, 20b and 20c is connected to the wheel shaft 7.14 and 15 between the swing shaft 3 and the swing shaft 3.
They are arranged radially across the

Reference numeral 19 denotes a fixed shaft rotatably inserted into the slide bearing, and each of the fixed shafts 19 is installed in each of the slide bearings 20, but one fixed shaft 19 is commonly extracted from each of the slide bearings. You can also use

Each of the fixed shafts 19 is provided with a flat surface i9a perpendicular to the sliding shaft above the sliding bearing, and a male threaded pin 19b is provided at the center of the flat surface i9a, which is screwed onto the flat surface i9a.
c is provided.

In addition, on each wheel axis 14.15. The swing shaft 3 and each fixed shaft 19 are precisely mounted to each other with no runout.

Reference numeral 21 denotes a holder for the material to be polished, which is bridged between the swing shaft 3 and any one of the fixed shafts 19, and this holder 21
19, one end of which is placed, for example, on the flat surface 19a of the fixed shaft 19 directly or through an intervening material (not shown).
C, and the other end is engaged with an eccentric pin 5 of the swing shaft 3.

That is, the holder 21 is fixed at one end perpendicularly and flat to the fixed shaft 19, and the U-shaped groove 21a at the other end is engaged with the eccentric pin 5 of the swing shaft 3.

As a result of this bridging of the holder 21, the intermediate part of the holder 21 is located above the grinding wheel 10 of one of the wheel axles (first wheel axle 7 in the drawing).

At an intermediate portion of the holder 21 located on the grindstone 10, a holding means is provided for holding a rod-shaped material 22, which is a material to be polished, perpendicular to the plane of the grindstone 10 of the wheel shaft 7.

That is, this holding means is attached to the holding tool 2 as shown in FIG.
■Groove 2 for vertically positioning the bar 22 on both sides of 1
At least one rod-shaped material 2 is provided from the side of the holder.
A presser plate spring 25 for pressing and fixing the 2 into the groove 23 is fixed with a screw.

In the illustrated embodiment, a connector sleeve for connecting an optical fiber is used as an example of the rod-shaped member that is the material to be polished. Recess 2 in tool 21
1b is formed, and the flange 22a is formed in this recess 21a.
The flange 22a is protected by the cover plate 24.

In this case, the cover plate 24 also has a ■groove 24 that matches the ■groove of the holder.
a is formed.

In the above configuration, since the eccentric pin 5 rotates together with the rotation of the swing shaft 3, the holder 21 swings about the fixed shaft 19 as a fulcrum.

The amount of rocking is equal to the angle of the circular arc formed by the holder 21 within a range twice the amount of eccentricity of the eccentric pin 5 from the rocking axis with the fixed shaft 19 as a fulcrum.

A rod-shaped member 22, which is a material to be polished, is set at right angles to the holder 21 approximately in the center of the holder 21, and the end face of the rod-shaped member 22 is uniformly polished by the rotation of the grindstone 10 and the rocking of the holder 21. do.

Furthermore, the fixed shaft 19 is sufficiently extended beyond the plain bearing 20, and by applying its own weight or weight, the rod-shaped member 22 can be pressed against the grinding wheel 10 below and ground with a constant pressure.

The gear 6 of the swing shaft 3 meshes with a gear 12 fixed to the first wheel shaft 7, and the gear 11 at the lower end meshes with a gear 13 fixed to the rotating shaft of the drive motor M-1. ,
Depending on the polishing conditions, one of the two single drive motors is selectively driven, but the present invention is not limited to this, and it is also possible to use one motor as the drive source and change the rotation speed of that one drive motor by electrical control. good.

Therefore, the end face of the rod-shaped member 22 is uniformly polished by the rotation of the grindstone 10 and the swinging of the holder 21, and by changing the grinding conditions of the three grindstones, it is possible to change the grindstone from rough polishing to finish polishing. Can be polished without any problems.

Next, the operation of the sander groove according to the present invention will be explained.
First, a rod-shaped member 22, which is the material to be polished, is attached to the material holder 21.
, fix the holder 21 to any one of the fixed shafts 19 (in the drawing, the fixed shaft corresponding to the first wheel), and insert it there, and at the same time set the U-shaped groove 21a so that the eccentric pin 5 is inserted. do.

Then, by starting the drive motor M-1, the gear 13
rotates the gear 11, thereby rotating the first wheel shaft 7 and the grindstone 10 installed on its flat surface 7a.

Further, at the same time as the first wheel shaft 7 rotates, the gear 12 fixed thereto rotates.

The gear 6 at the lower end of the swing shaft 3 is rotated to rotate the swing shaft 3.

When the swing shaft 3 rotates, the eccentric pin 5 rotates, and the fixed shaft 19
The holder 21 is swung around the fulcrum.

Therefore, the end surface of the rod-shaped member 22 is the first wheel shaft flat surface 7a.
The grinding is performed by the rotational movement of the grindstone 10 installed in the holder 10 and the swinging movement of the holder 21, and the holder 21 is lowered by the weight of the fixed shaft 19, and the polishing is continued until the timer stops.

Further rotation of the drive motor M-2 causes the gear 18 fixed on the drive motor M-2 to rotate, causing the gears 16 and 17 fixed to the lower ends of the second and third wheel axles 14.15 to rotate. The second and third wheel axles 14.15 are rotated to rotate the grindstone installed thereon.

When the machining on the first wheel shaft 7 is completed, the fixed shaft 1
Remove the nut 19c of 9, move the holder 21 to the second fixed shaft with the bar member 22 set, and screw it to the male threaded pin with a nut in the same way as when setting it to the first wheel, and polish it.

The same applies to movement to the third fixed axis.

It goes without saying that the drive motor can be stopped if necessary.

In addition, it is possible to implement the following:

Example 1 By eccentrically positioning the male screw of the fixed shaft and synchronizing the rotation of the swinging shaft and the rotation of the fixed shaft, the entire holder for the material to be polished, including not only the swinging shaft but also the fixed shaft, is swung. By doing so, a better polished surface can be obtained.

Example 2 When polishing a large number of rod-shaped members, three
By using a set and adjusting the height of the fixed shaft and grindstone, you can effectively utilize the three axes in the configuration.

As described in detail above, according to the configuration of the present invention, since the workpiece holder can be moved to each measuring axis, it is possible to perform accurate polishing from rough polishing to finish polishing without replacing the grindstone. Since the abrasive material was oscillated by an eccentric shaft installed in the wheel shaft, it was now driven independently, and the same accuracy as the one previously proposed by the inventor of the present invention was obtained, and it was made smaller. This has the effect of providing a simple and portable polishing machine.

[Brief explanation of drawings]

FIG. 1 is a plan view of the polishing device according to the present invention, and FIG.
The figure is a side sectional view, Figure 2 is the A-A' line in Figure 1 from the ■ direction, Figure 3 is the B-B' line from the [F] direction, and Figure 4 is the CC' line. FIG. 5 shows a configuration diagram of the material holder to be polished. 3... Swing axis, 5... Eccentric pin, 7...
...Wheel axis, 10...Whetstone, 19.
... Fixed shaft, 21. Open abrasive material holder, 22.
...rod-shaped member, 6,11°12.13,16,1
7,18...Gear, M-1゜M-2...
・Drive motor.

Claims (1)

[Scope of Claims] 1. A wheel shaft having a grindstone or a lapping machine installed at one end and driven by a motor, and an eccentric pin at an end parallel to one side of the wheel shaft and corresponding to the grinding stone or the lapping machine, and the motor A rocking shaft that rotates using the wheel as a driving source and a fixed shaft parallel to the other side of the wheel shaft are arranged side by side in a plane, and further, one end is removably attached to the fixed shaft, and the other end is connected to the rocking shaft. A material holder to be polished is provided which engages with an eccentric pin of the wheel shaft and is bridged on the plane of the grinding wheel or lapping machine, and an intermediate portion of the material holder facing the grinding wheel or lapping machine is provided with a material to be polished. An end face polishing machine for a rod-shaped member, comprising a holding member that holds the rod-shaped member, which is a material, at right angles to the grindstone or the lapping machine. 2. A plurality of wheel shafts and fixed shafts are arranged radially around the swing shaft, and the drive source for the other wheel shafts other than the at least one wheel shaft is a motor different from the swing shaft drive motor. An end face polisher for a rod-shaped member according to claim 1.