JPH0725847Y2 - Abrasion test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an abrasion tester for performing an abrasion test on a material under test against a magnetic tape.

[Outline of device]

According to the present invention, a material to be tested is mounted on a rotating drum of a drum device including a rotating drum and a fixed drum, and the material to be tested is rotated by contacting a magnetic tape wound around the outer periphery of the drum device and running. In the abrasion tester, the material to be tested is formed into a shape similar to that of the rotating head of the VTR and mounted on the rotating drum, so that it is easy to mount the material to be tested on the rotating drum and adjust the protrusion amount. It is something that can be done.

[Conventional technology]

Conventionally, this kind of wear test apparatus has been used for a wear test of materials such as a fixed drum of VTR and a tape guide member.

Then, in the conventional wear test apparatus, as shown in FIGS. 5 and 6, the rotary drum 1 and the fixed drum 2 are vertically arranged on the same axis to form the drum device 3, and the fixed drum 2 is provided.
Is fixed on the base 4, and the rotary drum 1 is driven by the spindle motor 5 attached to the base 4.

On the other hand, a plurality of test materials 6 formed in a columnar shape, such as a VTR fixed drum and a tape guide member, are placed in a plurality of concave grooves 7 provided at equal intervals on the outer peripheral surface 1a of the rotary drum 1. The plurality of test materials 6 are vertically inserted and screwed by a pair of screws 8 horizontally inserted from the inner peripheral surface 1b side of the rotary drum 1, respectively. To the outside of the outer peripheral surface 1a of the rotary drum 1 by a predetermined protrusion amount S.

Then, the magnetic tape 9 is helically wound around the outer circumference of the drum device 3 so as to straddle both the drums 1 and 2, and the magnetic tape 9 is wound along the tape lead 10 helically formed on the outer peripheral surface of the fixed drum 2. While running, the spindle motor 5 rotates the rotary drum 1 at a high speed to bring the plurality of materials 6 under test into contact with the magnetic surface 9a of the magnetic tape 9 and rotate the magnetic tape 9 so as to rotate the magnetic tape 9. The wear test of the material 6 to be tested is performed on the surface 9a.

By the way, in carrying out this abrasion test, the contact pressure of the material 6 to be tested against the magnetic tape 9 is important.

Therefore, conventionally, as shown in FIG. 6, a spacer 7 is sandwiched in the groove 7 on the side opposite to the magnetic tape 9 of the material 6 to be tested, and the spacer 7 is fastened together with a pair of screws 8. By adjusting the thickness of the spacer 7, the protrusion amount S of the material 6 to be tested from the outer peripheral surface 1a of the rotary drum 1 is adjusted.

[Problems to be solved by the device]

However, as in the prior art, the work of attaching the test material 6 to the rotary drum 1 with the pair of screws 8 horizontally inserted from the inner peripheral surface 1b side of the rotary drum 1 is troublesome for the driver to operate. Yes, it is not an easy task. Moreover, there is a problem in that the work of adjusting the protrusion amount S of the material 6 to be tested by adjusting the thickness of the spacer 7 is very troublesome.

The present invention provides a wear test apparatus capable of attaching a material under test to a rotary drum of a drum device by using a mounting jig for attaching the rotary head to the rotary drum of the rotary head drum during assembly of a VTR. Is intended.

[Means for Solving the Problems]

The present invention has a drum device composed of a rotating drum and a fixed drum. The material to be tested is attached to the outer peripheral surface of the rotating drum by projecting it, and a magnetic tape is wound around the outer periphery of the drum device for running. In a wear test apparatus configured to perform a wear test on the magnetic tape of the material under test by rotating the material under test by contacting the magnetic tape with a rotating drum, the VTR rotating the material under test. Formed in almost the same shape as the head,
A wear test apparatus was constructed so that a plurality of the materials to be tested were attached to the rotary drum along the circumference of the rotary drum and by the same attachment means as the rotary head of the VTR.

[Action]

The wear test apparatus configured as described above can
Since it is formed in almost the same shape as the rotating head of the VTR, when mounting this material to be tested on the rotating drum of the abrasion tester, use a mounting jig that attaches the rotating head to the rotating drum of the rotating head drum when assembling the VTR. Can be installed, as well as a rotating head.

〔Example〕

An embodiment in which the present invention is applied to a wear test device in the case where a test piece is made of a material for a fixed drum of a VTR will be described with reference to FIGS. 1 to 4. The same structural parts as those of the conventional example shown in FIG. 5 are designated by the same reference numerals and the description thereof is omitted.

First, FIGS. 3 and 4 show the entire wear test apparatus, in which the rotary drum 13 which is the upper drum of the drum device 3 is formed in substantially the same shape as the rotary drum of the rotary head drum of the VTR. There is. And the material to be tested which will be the test piece
14 is formed in the shape of the rotary head of the VTR as shown in FIG.
Each of the plurality of rotary head type materials to be tested 14 is screwed to each of 13a at an equal interval with one screw 15, and the tip portions 14a of the plurality of rotary head type materials under test 14 are inserted through a plurality of window holes 16 provided in the rotary drum 13. Then, the outer peripheral surface 13b of the rotary drum 13 is projected outward.

Then, as in the conventional case, the magnetic tape 9 is helically wound around the outer periphery of the drum device 3 while straddling both the drums 13 and 2.
While running this magnetic tape 9 along a tape lead 10 formed in a helical shape on the outer peripheral surface of the fixed drum 2,
The rotary drum 1 is rotated at a high speed by the spindle motor 5, and a plurality of materials 14 to be tested are magnetically attached to the magnetic surface of the magnetic tape 9.
The abrasion test of the material 14 to be tested against the magnetic surface 9a of the magnetic tape 9 is carried out by contacting and rotating the magnetic tape 9a.

The material 14 to be tested will be further described with reference to FIG. 1. The body 14b of the material 14 to be tested has substantially the same shape as the base of the rotary head. A tip portion 14a having substantially the same shape as the tip of the head is integrally provided, and the tip surface of the tip portion 14a is formed into an arc surface 14c that is substantially the same as the tip surface of the chip.
Further, a fool hole 17 having a larger diameter than the outer diameter of the screw 15 is provided at substantially the center of the main body 14b.

Then, as shown in FIG. 2, the material 14 to be tested is rotated by the single screw 15 inserted into the fool hole 17 into the rotary drum 13
It is screwed to the bottom surface 13a of the rotary drum 13 and its tip portion 14a is projected from the window hole 16 of the rotary drum 13 to the outside of the outer peripheral surface 13b of the rotary drum 13 by a predetermined projection amount S.

At this time, since the material 14 to be tested is formed in substantially the same shape as the rotary head of the VTR, as shown in FIG.
Mount the rotating head to the rotating drum of the rotating head drum when assembling the VTR Hold the main body 14b with the mounting jig 18, and use this mounting jig 18 to rotate the rotating drum 13 of the material under test 14
VT and adjust the protrusion amount S indicated by arrow a.
It can be done as easily as the R rotating head. Also, the protrusion amount S can be measured by using the protrusion amount measuring jig of the rotating head of the VTR. The screw 15 is located on the bottom surface 13a of the rotary drum 13 from a direction parallel to the axis of the rotary drum 13.
The screwing work is also easy because the screwdriver can be easily operated, etc.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various effective modifications can be made based on the technical idea of the present invention.

Further, the present invention can be widely applied to a wear test device for testing a specimen taken from these materials in order to examine the wear performance of various members that come into contact with a running magnetic tape, such as a tape guide member and the like. Is.

[Effect of device]

Since the present invention is configured as described above, when mounting the test material formed in the same shape as the rotary head of the VTR on the rotary drum of the drum device, the rotary head is mounted on the rotary drum of the rotary head drum when the VTR is assembled. It can be mounted in the same way as a rotating head by using the mounting jig. Therefore, the material under test can be mounted on the rotating drum as easily as the rotating head, and the amount of protrusion of the material under test from the outer peripheral surface of the rotating drum can be easily adjusted using the mounting jig of the rotating head. Besides, there is an effect that can be done accurately.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing a material to be tested, and FIG. 2 is an enlarged view of a main part showing a mounting state of the material to be tested. 3 and 4 are partially cutaway side views of the whole, and FIG. 4 is a drawing of FIG. 3 taken along the line IV-IV. FIG. 5 is a partially cutaway side view showing a conventional example, and FIG.
FIG. 6 is an enlarged sectional view taken along the line VI-VI in the figure. In the reference numerals used in the drawings, 2 ... fixed drum 3 ... drum device 9 ... magnetic tape 13 ... rotating drum 13b ... outer surface of rotating drum 14 ... material to be tested 15 ... screw 18 ... … Mounting jig S… Protrusion amount.

Claims (1)

[Scope of utility model registration request] 1. A drum device comprising a rotating drum and a fixed drum, wherein a material to be tested is attached to the outer peripheral surface of the rotating drum so as to project therefrom, and a magnetic tape is wound around the outer periphery of the drum device for running. In the wear test apparatus configured to perform a wear test on the magnetic tape of the material under test by rotating the material under test by contacting the magnetic tape with the rotating drum, the material under test is a VTR. The rotary head is formed in substantially the same shape as that of the rotary head, and a plurality of materials to be tested are attached to the rotary drum along the circumference of the rotary drum and by the same attachment means as the rotary head of the VTR. A wear test device characterized by the above.