JPH0638303B2 - Reel stand device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Use of the Invention The present invention relates to a recording / reproducing apparatus using a magnetic tape,
The present invention relates to a structure of a reel stand for holding a reel on which a magnetic tape is wound, and more particularly, to improvement of assemblability.

[Background of the Invention]

In a recording / reproducing apparatus using a magnetic tape, particularly in a VTR (video tape recorder), the reel stand is an important part for determining the running height of the magnetic tape for recording and reproducing video and audio signals. The reel stand was required to be adjustable in height, have a small bearing load torque during rotation, and be easy to assemble. For these, various reel stands have been devised.

Japanese Utility Model Publication No. 55-22605 proposes a reel stand structure that can be assembled and prevented with a simple structure. However, in the above-mentioned known example, it is necessary to reduce the diameter of a part of the reel rotation shaft in order to prevent the reel stand from coming off, and to integrate the two reel stand constituent parts between both ends of the reel stand. It was necessary to provide a press-fitting length and a bent portion when the reel stand was inserted, and the distance between both bearings became large, making it unsuitable for downsizing.

Also, it is preferable that the reel shaft has a small shaft diameter in order to reduce radial bearing loss torque, but it is necessary to provide a groove on the reel shaft as a retaining part, and the strength of the groove portion prevents bending when the reel shaft is pressed into the substrate. It must have strength that does not occur, and the size of the bearing diameter must be increased.

[Object of the Invention]

An object of the present invention is to provide a reel stand device that does not require groove processing on the reel shaft to prevent the reel stand from coming off and prevents the reel stand from coming off by inserting it in the axial direction, thereby improving assembly workability. To provide.

[Outline of Invention]

According to the present invention, the reel shaft that supports the reel base is straight (without a groove), and a return member that is press-fitted and fixed to the reel shaft is provided between radial bearings provided at both ends of the reel base to prevent the reel base from coming off. In addition to being carried out, it is possible to assemble from the reel axial direction.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side half sectional view showing a reel stand according to the present invention, and FIG. 2 is an exploded perspective view thereof.

Reference numeral 1 is a reel shaft that pivotally supports a reel base 2, the tip of which is spherical and the other end of which is fixed to a substrate 10. One end of the reel base 2 is capped via a spring 3, a claw 4 and a thrust receiver 9. 5 is press-fitted, and a radial bearing 8 is press-fitted into the other end via a stopper 7. The upper portion 2-1 of the reel stand 2 is in the shape of a hexagonal prism, and engages with the hexagonal shape provided inside the claw 4 with a gap, and the spring 3 urges the claw upward. The rotation transmitted to the reel stand lower portion 2-2 is transmitted to the claw 4 by an idler (not shown), and the reel engaged with the claw 4 is rotated. A screw portion is provided in the center of the reel cap 5, and the position of the thrust receiver 9 provided between the reel base 2 and the reel cap 5 is regulated by the screw 6. Further, a radial bearing portion 2-3 is integrally provided on an upper portion of the reel base 2, and a stopper, which is a return member having an inner diameter slightly smaller than the reel shaft 1 and a split portion, is provided on a lower portion thereof. The stopper 7 is a reel stand 2
The radial bearing 8 is press-fitted in the lower part of the shaft, and is held with a clearance in the axial direction and the radial direction.

After assembling the reel stand, the assembling on the reel shaft 1 provided on the substrate 10 will be described. With the height adjusting screw 6 of the reel stand moved upward, the reel stand is inserted from directly above the reel shaft 1. At this time, the inner diameter of the stopper 7 is the reel shaft 1.
Is provided slightly smaller than the outer diameter of the reel shaft 1, and the slit portion of the stopper is spread by the tip end portion of the reel shaft 1 and is press-fitted in the axial direction together with the reel stand. After press-fitting, the screw 6 is rotated and moved downward, so that the tip of the screw 6, the thrust receiver 9 and the reel shaft 1 are in contact with each other, so that the reel stand 2
Is lifted up, and the contact between the reel base 2 and the stopper 7 that was pressing the stopper 7 is released. The height of the reel base 2 is set to the designed height by adjusting the position of the screw 6.

In this state, the load in the thrust direction of the reel stand 2 is received by the spherical surface provided at the tip of the reel shaft in the central portion of the thrust receiver 9, and the load in the radial direction is in the reel stand 2.
It can be received by the radial bearings provided at two locations above and below.
Since the stopper 7 is press-fitted and fixed to the reel shaft 1 but does not contact the reel base 2, the bearing opening torque of the reel base can be reduced, and even if the device is turned upside down, the reel base will contact the stopper 7. It does not fall out.
Further, even if it is necessary to replace the reel base for some reason, since there is no step on the reel shaft 1, the reel base 2 can be removed by pulling up the reel base 2 with the same force as when it is assembled. .

〔The invention's effect〕

As described above, according to the present invention, it is possible to assemble the reel base before assembling it into the device, and the assembling into the device is possible only by inserting the reel in the axial direction of the reel so that the height can be adjusted. Upon completion, the reel stand can be prevented from coming off without providing a groove on the reel shaft.

In addition, since it is not necessary to provide a groove on the reel shaft, bending of the reel shaft during groove processing, bending when press-fitting the reel shaft into the substrate, etc. do not occur, and since it can be assembled by only inserting from the axial direction, automatic It is possible to further reduce the size of the effects such as providing a reel stand apparatus suitable for assembly.

[Brief description of drawings]

FIG. 1 is a half sectional view of a reel stand according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. 2 ... Reel stand 3 ... Spring 4 ... Claw 5 ... Cap 6 ... Screw 7 ... Stopper 8 ... Bearing 9 ... Thrust bearing

Claims (1)

[Claims] 1. A reel stand apparatus comprising a reel shaft and a reel stand rotatably supported by the reel shaft, wherein a tip end is formed in a hemispherical shape, and the other end is fixed to a substrate. A reel shaft that has, and a first shaft that is formed on the tip end side of the reel shaft and is in sliding contact with the reel shaft.
Of the reel base having the radial bearing of the reel base, a second radial bearing press-fitted into the end of the reel base opposite to the first radial bearing and slidingly contacting the reel shaft, and the reel base and the second radial bearing. A stopper that is held with a gap between them and that has an inner diameter that is slightly smaller than the outer diameter of the reel shaft, a cap that is pressed into the top of the reel stand, and a screw that is screwed into the center of the cap A reel stand device including a screw for adjusting the height dimension of the reel stand and a disk-shaped thrust bearing arranged between the screw and the tip of the reel shaft.