JPH0618777Y2 - Left-right feed reversing device for polishing table - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a polishing machine, in which a table is fed to the left or right to switch the table feed to the left or right in order to reciprocate the work piece in the left and right directions. Reversing device

[Conventional technology]

In the conventional polishing machine, the table is fed to the left and right by a motor,
Alternatively, the one configured to be performed manually is known.
(Refer to Japanese Utility Model Laid-Open No. 61-127964) As shown in FIG. 4, the table left / right feed reversing device in the above polishing machine is rotatable about the base a and the gear case b, and is slidable in the axial direction. A pinion d is fixed to the erected drive shaft c with a pin e, and the pinion e is engaged with a rack f fixed to the lower side of a table (not shown), and a motor g is rotated left and right by a reversal instruction limit switch (not shown). The drive shaft c is driven via the gear shift mechanism h and the clutch i, the pinion d is rotated in the left-right direction, and the table is reciprocated in the left-right direction via the rack f.

[Problems to be solved by the invention]

However, in the above conventional device, the pinion d is attached to the drive shaft c.
Since the structure is fixed, the shock when the pinion d is reversed right and left is directly transmitted to the rack f, which lifts the rack f and the table, the polishing surface is wavy, or both ends of the polishing surface are “drooped”. There is a problem.

The present invention is intended to solve the above-mentioned conventional problems, in which a pinion is rotatably mounted on a drive shaft and a spring holder is mounted on the drive shaft so as to be rotatable at a constant angle in the circumferential direction.
The spring holder and the pinion are connected by a coil spring, and when reversing, a time lag is generated between the drive shaft and the pinion, and the shock at the time of reversing is absorbed by the coil spring. The aim is to provide a feed reversing device.

[Means for solving problems]

That is, according to the present invention, a table is provided so as to be laterally moved by a motor or manually through a feeding means including a pinion and a rack, the drive shaft is loosely fitted with the pinion, and spring holders are provided on both sides of the pinion. In a polishing machine in which coil springs of the same winding direction are fixed between the pinion and the spring holder, a pin and an elongated hole are formed so that the spring holder can rotate a certain angle with a reversal time shift. The spring holder is fitted and fitted in the circumferential direction, and the pinion side of the spring holder and the inner ends of both ends of the pinion are formed in a small diameter portion, and the outer circumference of the small diameter portion and the coil spring are Provide a gap between the coil springs when the diameter of the coil spring is reduced, and connect the spring holder and pinion with the coil spring. The rotation of the drive shaft via a spring holder and a coil spring, by which is transmitted to the pinion, by which a configuration which is adapted to absorb when reversing shock table is to that solves the above problems.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.
As shown in FIGS. 1 to 3, the drive shaft 1 is mounted on the base 2 and the gear case 3 via the metal 4 so as to be rotatable and slidable in the axial direction.

The drive shaft 1 is linked to the motor shaft 5a of the motor 5 fixed to the gear case 3, the gear transmission 6 and the clutch 7 so as to be drivable by the motor 5, and at the same time, the positioning mechanism 8 allows high speed operation. They are held at low speed, neutral position and neutral position, respectively.

A handle 9 is provided at an extension end of the drive shaft 1 extending outward from the base 2, a groove 10 provided in the drive shaft 1, and the groove 1
0 is detachably fixed by a handle fixing mechanism 13 made of a steel ball 12 elastically fitted by a spring 11 and the boss 9a of the handle 9 is fixed to the boss 2a of the base 2. It is rotatably supported by being fitted to the shaft so as not to move in the axial direction.

A first knob 14 and a second knob for moving the drive shaft 1 in the axial direction to switch the drive shaft 1 to high speed, low speed and neutral positions, respectively, at the extended end of the drive shaft 1 extending outward from the handle 9. 15 is attached via a slide / engagement means 16.

When the second knob 15 is pushed in and the drive shaft 1 is slid to the right in FIG. 1 to switch the clutch 7 at a high speed, or when the first knob 14 is pulled out, the drive shaft 1 is left in FIG. When the clutch 7 is slid in the direction and the clutch 7 is switched to a low speed, the handle shaft fixing mechanism 13 releases the drive shaft 1 from the handle 9, and the clutch 7 is switched to the neutral position in the state shown in FIG. The drive shaft 1 and the handle 9 are fixed so that the table 1 shown in FIG.
The left and right feed of the table 7 can be manually performed by the handle 9, and the left and right feed of the table 17 is performed by the motor 5 by switching the clutch 7 between high speed and low speed, and the handle 9 does not rotate at this time. Is formed.

A pinion 18 is rotatably mounted on the drive shaft 1 and is meshed with a rack 19 fixed to the lower side of the table 17.

In addition, spring holders 20 and 21 are rotatably mounted on both sides of the pinion 18 on the drive shaft 1, respectively. The spring holders 20 and 21 have elongated holes 22 and 23 long in the circumferential direction. The pins 24, 24 provided and penetratingly fixed to the drive shaft 1 are slidably engaged with the pins 24, 24 in the circumferential direction.
The drive shaft 1 and the spring holders 20 and 21 are formed so as to be rotatable (about 90 degrees in the illustrated example), thereby causing a reversal time difference.

The pinion 18 side of both the spring holders 20 and 21 and both ends of the pinion 18 are formed in cylindrical portions 20a, 21a, 18a, 18a having the same outer diameter, respectively. Coil springs 25 and 26 of the same winding direction are externally fixed to the inner side, that is, the cylindrical portions 20a and 21a, respectively, and both ends of the pinion 18, that is, the cylindrical portions 18a and 18a are attached to the inner ends of the coil springs 25 and 26, respectively. It is press-fitted so that the drive shaft 1 and the pinion 18 are attached to the spring holder 2
They are connected at 0 and 21.

That is, the drive shaft 1 is positively rotated by the motor 5 or manually, and the spring holder 20 has a time lag from this.
When is rotated, the coil spring 25 is squeezed in the winding direction to reduce the diameter, and the spring holder 20 and the pinion 1
8, the spring holder 20 and the pinion 18 are closely attached to the outer circumference of each of the cylindrical portions 20a and 18a, and the rotation of the drive shaft 1 is transmitted to the pinion 18 via the pin 24, the spring holder 20, and the coil spring 25. It is made to be formed.

Further, the other spring holder 21 and the pinion 18 are similar to those described above, but since the coil springs 25 and 26 having the same winding direction are used in this case, the normal rotation of the drive shaft 1 is performed. When one coil spring 2
0 reduces the diameter as described above and transmits the rotation to the pinion 18, and at this time, the other coil spring 21 is pushed and expanded to increase the diameter, so that the slip rotation occurs. Expands and slips, and the other coil spring 21 contracts and transmits rotation to the pinion 18.

That is, the normal rotation and the reverse rotation of the drive shaft 1 are transmitted to the pinion 18 by utilizing the characteristics of the coil springs 25 and 26.

Also, the inner ends of the cylindrical portions 20a, 21a of the spring holders 20, 21 are formed into small diameter portions 20b, 21b, and between the outer circumferences of the small diameter portions 20b, 21b and the inner diameters of the coil springs 25, 26. In addition, the coil springs 25 and 26 are provided with gaps 27 and 27, respectively, which are necessary when the diameter of the coil springs 25 and 26 is reduced.

In FIG. 3, 28 indicates a polishing part. This polishing part 2
Similar to the known one, 8 is formed so as to drive the grinding wheel 28b via a reduction gear by a motor (not shown) mounted in the housing 28a.

[Effect of device]

As described above, since the table lateral feed reversing device in the polishing machine according to the present invention is configured, it is driven when the table 17 is reversed from left to right or in the opposite direction. The spring holders 20 and 21 are time-shifted with respect to the rotation of the shaft 1, and the coil spring enters the gap 27 when the diameter is reduced, so that shock at the time of reversal is prevented and the spring holders 20 and 21 are Since the coil springs 25 and 26 connecting the pinion 18 absorb the shock at the time of reversing, the reversing shock at the time of reversing the left and right feeding of the table 17 is eliminated, so that the reversing feeding operation of the table 17 becomes smooth, and the material to be polished is polished. It is possible to improve the processing quality of the polished surface in
The forward and reverse rotations of the drive shaft 11 can be smoothly transmitted to the pinion 18 by utilizing the spring characteristic of 26, and further, the structure is simple, so that there is an effect that it can be implemented at low cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional plan view showing an embodiment of a table left-right feed reversing device in a polishing machine according to the present invention, FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG. 1, and FIG. FIG. 4 is a front view of the board, and FIG. 4 is a vertical sectional plan view showing a conventional reversing device. 1 ... Drive shaft, 5 ... Motor 17 ... Table, 18 ... Pinion 19 ... Rack, 20, 21 ... Spring holder 22, 23 ... Oblong hole, 24 ... Pin 25, 26 ... Coil spring

Claims (1)

[Scope of utility model registration request] 1. A table 17 is provided so as to be fed by a motor 5 or manually in the left-right direction via a feed means composed of a pinion 18 and a rack 19, and the pinion is loosely fitted to the drive shaft 1 to provide the pinion. Spring holders 2 on both sides of
In a polishing machine in which 0 and 21 are arranged and coil springs 25 and 26 in the same winding direction are fixed between the pinion and the spring holder, the spring holder can rotate with a certain angle with a reversal time difference from the drive shaft. As described above, the pins 24, 24 and the long holes 22, 23 are fitted and attached in the circumferential direction of the spring holder, and the pinion side of the spring holder and the inner ends of both ends of the pinion are connected to the small diameter portion 20b, 21b, a gap 27 is provided between the outer periphery of the small diameter portion and the coil spring when the diameter of the coil spring is reduced, and the spring holder and the pinion are connected by the coil spring to rotate the drive shaft. Is transmitted to the pinion through the spring holder and the coil spring, so that the shock when the table is reversed is absorbed. It was adapted to horizontally feed reversing device table in polishing disk, characterized in.