JPH0548247Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a device for mounting a head base on a rotatably arranged jig when polishing a magnetic head for a video recorder.

(b) Prior Art An example of an apparatus for polishing the tape contacting surface of a magnetic head is disclosed in Japanese Patent Application Laid-open No. 172110/1983. In this case, when attaching the head base to the rotary plate, the position was manually determined and fixed with screws.

(c) Problems that the invention aims to solve However, manual methods such as fixing with screws are not only time consuming and inefficient, but also have the disadvantage that the magnetic head moves during the final tightening. It was hot. Furthermore, if the material is fixed with screws, one-touch feeding and removal is not possible, which results in an increase in the size of the equipment.

(d) Means for Solving the Problems The head base mounting device of the present invention consists of a wall portion having an L-shaped wall on the upper surface and a flat pedestal defining the bottom surface of a recess facing the wall. a jig main body, a pressing means biased and fixed to the jig main body via a spring means so as to abut the end of the flat pedestal, and a head base that can be mounted on or removed from the jig main body; It consists of a means for temporarily displacing the pressing means against the biasing force of the spring means, and a taper pin having a conical taper part set up in the flat holder, and the positioning hole provided in the head base is The head base is configured to be pressed against the wall by the pressing portion when the head base is attached loosely to the taper pin.

(E) Function During installation, the jig body is in a stopped state. In this state, the displacement driving means acts to slightly displace the pressing means in a direction against the biasing force of the spring. As a result, the concave portion of the jig body expands,
The head base can be easily supplied to the recess.
When the head base is placed in the recess, the positioning hole of the head base loosely fits into the taper pin of the flat holder, and the head base is housed in the recess using the taper pin as a guide. When the head base is applied to the recess, the action of the displacement driving means is released and the pressing means returns to its original state by the spring force, thereby clamping the applied head base between it and the L-shaped wall portion. The side surface of the head base that abuts one surface of the L-shaped wall portion serves as the reference surface of the head base itself. The head base is attached to the outer circumferential side of the jig body so that the magnetic head protrudes. When it is necessary to remove the head base after polishing, such as in the polishing process of a magnetic head, the displacement driving means acts on the pressing means again to temporarily enlarge the recessed portion, and in this state, the head base is taken out.

(F) Embodiment FIG. 1 is a plan view showing a magnetic head polishing device and a head base mounting device of the present invention. 1 is a head base mounting device, which includes a rotating jig main body 2, three displacement drive means 3,
It has 4,5. The displacement driving means 3, 4, and 5 are formed by air cylinders, and their shafts 3a, 3b, and 3c move in the directions of the arrows, respectively, and act on the pressing means on the rotating jig main body 2 side.
6 is a first polishing device for polishing by running a relatively rough polishing tape 7 of #8000, and 8 is a second polishing device for polishing by running a tape 9 for fine polishing of #12000. After the head base is inserted into the tool body 2 and the displacement driving means 3, 4, and 5 have retreated, the rotating jig body 2 moves toward and comes into contact with the first polishing device 6, and in this state the tape 7 is run. At the same time, the rotating jig main body 2 is rotated to roughly polish the tip of the magnetic head. After that, the rotating jig main body 2 is moved to the second polishing device 8 side on the opposite side, and there
Perform fine polishing using a polishing device.

Next, Figure 2 shows the rotating jig main body 2 taken out.
FIG. 4 will be explained. The rotating jig main body 2 consists of a rotating substrate 10, a flat pedestal 11, and a wall portion 12. The wall portion 12 is located at the top and has three L-shaped walls. Recess 13 facing this L-shaped wall
The flat pedestal 11 is arranged under the wall portion 12 so as to define the bottom surface of the wall portion 12. The rotary board 10 has a groove 14 facing a part of the lower surface of the flat pedestal 11, and one end of the groove 14 is located at the corner where one surface 15a and the other surface 15b of the L-shaped wall intersect. A press plate 16 having a press contact piece 16' protruding upwardly and facing the flat plate 11 is disposed so as to be able to come into contact with and slide on the lower surface of the flat holder 11. This situation is clearly shown in the sectional view of FIG. That is, the wall portion 12 and the flat pedestal 11 are fixed to a pin 17 set on the rotating board 10, and the pin 17 and the pressing plate 16
The pressing plate 16 is biased toward the pin 17 by a spring 19 stretched between the small pin 18 projecting downward and comes into contact with one end of the flat holder 11. Note that the press plate 16 is fitted into the pin 17 through a long hole 20, and can be moved within the range of this long hole 20.
FIG. 4 shows a state in which the pressing plate 16 has just received an external force and has moved to the maximum extent against the biasing force of the spring 19. In this state, the head base 21 is placed on the flat pedestal 11, When the external force applied to the pressing plate 16 is released, the pressing piece 16' of the pressing plate 16 presses the head base 21 between the two surfaces 15a and 15a of the L-shaped wall.
15b. The flat pedestal 11 is provided with an upright taper pin 11a, the tip of which is tapered to facilitate fitting of the head base.

FIG. 3 shows a state in which the head base 21 is held in the recess 13 under pressure. Incidentally, a guide rail portion 22 is formed on the rotary substrate 10 in order to make the displacement of the pressing plate 16 smooth. As shown in FIG. 5, the head base 21 includes a front portion 24 to which a magnetic head 23 is attached;
It consists of a lead conductor 25 and a back portion 27 having a positioning hole 26, but the conductor 25 and the like are omitted in FIG. 3. Incidentally, the positioning hole 26 functions as a mounting hole when the head base is mounted on a rotating cylinder of a VTR.

Similar to the wall portion 12 described above, the flat receiving portion 11 is constructed of a single piece so that it is common to all mounting locations (three locations in the case shown), but the pressure plate 1
6 are provided individually. Pressing plate 16
The other end projects toward the adjacent mounting part, and this projecting portion 16'' is used as the shaft 3a, 3b, 3c of the displacement drive means 3, 4, 5 shown in FIG.
is pushed to displace the pressing plate 16 against the biasing force of the spring 19.

Next, FIG. 6 shows how the head base 21 is moved into the recess 13.
means 28 for supplying the
In the state shown in FIG. 1, the head base 21 is lowered from directly above the rotating jig main body 2 (perpendicular to the paper surface of FIG. , and then moves upward. The supply means 28 includes a cam 33 biased toward the center by a spring means 32 disposed in a large-diameter notch 31 of the cylindrical body 30, and a truncated conical control cam 34 fitted in the center of the cam 33. It is equipped with a control cam 34.
is a hollow portion 3 extending upward connected to a large-diameter recessed portion 31;
It is formed integrally with a guide body 36 that moves up and down while being guided by the guide body 5. On the other hand, the cam 33 is provided with an air passage therein, and has a leg part 29 at its end that attracts the head base 21. The control cam 34 is normally in a downwardly moved position, so the three cams 33 are spaced apart from each other and their legs 29 are spread out, but the head base 21 is not connected to the rotating jig main body 2. When feeding into the recess 13, the control cam 34 moves upward with respect to the cylindrical body 30, and the sixth
It will be in the state shown in the figure. At this time, the legs 29 narrow together. As a result, the rear end of the head base 21 is brought into contact with the other surface 15b of the L-shaped wall.
However, the head base need not be supplied by the means shown in FIG. 6, but may be simply supplied from above so that the positioning hole of the head base fits into the taper pin. Note that the surfaces 15a and 15b of the wall portion 12 correspond to the recess 13 of the head base 21.
In order to make the insertion operation smooth, a taper is provided as shown in FIGS. 2 and 3.

(g) Effects of the invention According to the invention, the head base is held against the jig body by elastic force, so compared to the conventional screw-fastened structure, work efficiency is significantly improved, as well as mounting accuracy and reliability. It has the effect of increasing sex.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the head base mounting device of the present invention together with a magnetic head polishing device, FIG. 2 is a perspective view of the main parts thereof, FIG. 3 is a perspective view of the main parts with the head base attached, and FIG. FIG. 4 is a sectional view taken along the line X-X' in FIG. 2. FIG. 5 is a perspective view of the head base, and FIG. 6 is a sectional view of a main part of the head base supply means. 2... Jig main body, 3, 4, 5... Fluctuation drive means, 10... Rotating board, 11... Flat cradle, 1
1a... Taper pin, 12... Wall portion, 13...
Recess, 16...Press plate, 17...Pin, 19...
Spring, 21...head base, 26...taper pin.

Claims (1)

[Claims for Utility Model Registration] (1) A rotatable jig body consisting of a wall portion having an L-shaped wall on the upper surface and a flat pedestal defining the bottom surface of a recess facing the wall; a pressing means that is biased and fixed to the jig main body via a spring means so as to come into contact with the end of the flat pedestal; A head base installation state comprising means for temporarily displacing the head against an urging force, and a taper pin having a conical taper part set up in the flat holder, and a positioning hole provided in the head base is loosely fitted into the taper pin. The head base mounting device is characterized in that the head base is urged against the wall by the pressing portion. (2) The head base mounting device according to claim 1, wherein the wall is formed with a taper for smoothly guiding the head base into the recess.