JPS645370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a position regulating device for a magnetic test object.

A magnetic head used in a video tape recorder (VTR) is constructed, for example, by winding a coil around a winding hole 2 of a core 1 as shown in FIG.
The positional relationship between the tape contacting surface 3 and the winding hole 2 of this magnetic head must be precisely defined in order to obtain a magnetic head with uniform characteristics. I'm trying to check the relationship. For this test, it is necessary to accurately position the magnetic head, which is the test object, and conventionally this has been done mechanically. However, in this method, when a fragile material such as ferrite is used as the magnetic head core, cracks or chips occur during handling, making it difficult to efficiently obtain a magnetic head with good characteristics. Further, since the size of the magnetic head core to be handled is extremely small, there was also a problem in workability.

The present invention provides a device that accurately regulates the position of a test object without mechanically supporting it by using the magnetism of the test object, thereby making it possible to inspect the test object without damaging it. It is.

Next, the present invention will be explained based on illustrated embodiments. In FIG. 2, 4 is a parts feeder that supplies the magnetic head 1 as a magnetic test object, 5 is a position regulating device of the present invention, and 6 is an inspection machine that inspects the magnetic head installed at a reference position.

The parts feeder 4 has a base 9 equipped with means 7 for sequentially arranging the magnetic heads in a fixed direction, and a robot device 8 for supplying the magnetic heads arranged by the arranging means to the position regulating device 5 . Arranging means 7
The device includes a container 10 that accommodates magnetic heads and arranges them, and a guide 11 that sequentially leads out the magnetic heads positioned in a fixed direction from the container. ensure that there is a magnetic head with The robot device 8 includes a rotating arm 13 that is rotatably supported on a base 9, and a rotating arm 13 that is installed at the tip of this arm and receives air from a compressor (not shown) through an intake and exhaust pipe 14 so as to attract or release a magnetic head. The robot device 8 is equipped with a beak 15 for guiding air, and under the control of the compressor and the arm 13, the beak 15 can attract the magnetic head of the outlet 12 and release it to a predetermined position of the position regulating device 5 . It is composed of

The position regulating device 5 basically includes a non-magnetic table 16, an operating means 17, and a permanent magnet 18. The non-magnetic table 16 is provided with a recess 19 for receiving a supply of magnetic heads, this recess having a corner 21 which matches one reference corner 20 of the magnetic head and a magnetic head supplied in a substantially unidirectional manner into this recess. The reference corner 20 is the corner 21.
It is provided with a guide wall 22 that restricts the direction to face. The operating means 17 has one end attached to the non-magnetic table 16.
A knob 23 is fixed to the knob 23, and the non-magnetic table is reciprocated between the first position (the position in FIG. 2) where the magnetic head is supplied and the second position which is the reference position based on the operation of the knob. It is provided with a rail 25 formed on the base plate 24, and further provided with stoppers (not shown) for positioning the non-magnetic table 16 at each of the above positions. The permanent magnet 18 is
Non-magnetic table 16 moved to the reference (second) position
(see FIG. 3), and while the non-magnetic table 16 is being moved from the first position to the second position, it exerts a magnetic influence on the magnetic head in the recess 19, and further In the second position, the reference corner 20 of the magnetic head is pressed against a corner 21 in the recess 19. It has been confirmed through experiments that the direction of magnetization of the permanent magnet 18 is not limited to the direction shown in the figure, but may also be selected in a direction perpendicular to the non-magnetic table.

The inspection machine 6 includes a light source 26 that irradiates light from below through a recess 19 onto a magnetic head on a non-magnetic table 16 disposed at a reference position, and a microscope 2 that magnifies the magnetic head irradiated by the light source.
7.

The procedure for regulating the position of the magnetic head in such an apparatus of the present invention will be explained. First, the non-magnetic table 16 is placed in a first position and the magnetic head of the outlet 12 is brought into the recess 19 using the robotic device 8. At this time, the magnetic head is placed on the non-magnetic table 16.
Since the position of the arm 13 and the amount of rotation of the arm 13 are specified, the arm 13 is placed at a predetermined position (however, an error may occur) within the recess 19 (see FIG. 4A). Next, when the non-magnetic table 16 is moved toward the second position by the operating means 17, the magnetic head tends to rotate counterclockwise under stress due to the influence of the magnetic field from the permanent magnet 18. There is a guide wall 2
2, it will be settled in a predetermined position (the position where the reference corner 20 coincides with the corner 21). When the non-magnetic table 16 reaches the second position, the reference corner 20 of the magnetic head coincides with the corner 21 of the recess, and each side 28, 29 is the side wall 3 of the recess
0 and 31, respectively, and are magnetically regulated in that position by the magnetic force of the permanent magnet 18. At this position, for example, the fat end of the magnetic head is inspected by the inspection machine 6 . Thereafter, the non-magnetic table 16 is moved to the first position by the operating means 17, and the inspected magnetic head is moved to the next process. By repeating this cycle, the magnetic heads in the parts feeder 4 can be sequentially inspected.

As mentioned above, this device is a magnetic head with extremely small external dimensions (for example, approximately 3 mm x 2 mm x 0.2 mm).
A magnetic test object, such as a magnetic test object, can be set at a reference position on the side wall defined in the recess without handling the magnetic test object using mechanical methods, thereby preventing damage to the magnetic test object and increasing efficiency. You can perform various inspections.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the structure of a magnetic head core, FIG. 2 is a perspective view of a schematic structure of an inspection device including the device of the present invention,
Figure 3 A, B, and C are a plan view of the device of the present invention at the second position, a side sectional view along A-A and a side sectional view along B-B, and Figures 4 A and B are explanatory diagrams of the operation of the device of the present invention. It is. Explanation of main drawing numbers 1...Magnetic test object (magnetic head), 4 ...Parts feeder, 5 ...Position regulating device,
6... Inspection machine, 16... Non-magnetic table, 17... Operating means, 18... Permanent magnet, 19... Recess, 21... Corner of magnetic head relative to reference corner 20, 22...
Guide wall.

Claims (1)

[Claims] 1 A recess into which a magnetic test material is supplied, which has a corner that matches one reference corner of the magnetic test material, and which allows movement of the magnetic test material supplied into the recess in a substantially fixed direction to the reference corner. a non-magnetic table having a recess with a guide wall that restricts a corner to face the corner; and a non-magnetic table located between a first position where the magnetic test material is supplied and a second position which is a reference position. a permanent magnet that is disposed behind the non-magnetic table moved to the second position and presses the reference corner of the magnetic test object to the corner of the non-magnetic table; A position regulating device for magnetic test objects.