JPH09274748A - Tape recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently increase the friction resistance of a rotation contact part and to shorten the accessing time of searching by supporting a rotary body in a rotational center axis via a bearing body. SOLUTION: This tape recording/reproducing device is provided with a rotary body 36, a reel lug 37, a height adjusting screw 38, a bearing body 39 and a coil spring 40. Reel bases 1 and 2 are rotated around a reel shaft 35, and a magnetic tape T from a supply side reel 5 is taken up on a take-up side reel 6. At this time, the rotary body 36 is rotated around the shaft 35 in the reel bases 1 and 2, and the height adjusting screw 38 and the bearing body 39 integrated to the rotary body 36 are also rotated integrally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recording / reproducing apparatus that uses a tape-shaped information recording medium such as a magnetic tape as an information recording medium, and more particularly to the structure of a reel stand on which a tape reel is mounted.

[0002]

2. Description of the Related Art Conventionally, as this type of tape recording / reproducing apparatus, for example, an apparatus having the following configuration is known. A conventional tape recording / reproducing apparatus draws out a magnetic tape wound between a pair of rotatable reel bases into which a pair of tape reels are fitted and tape reels mounted on both reel bases, and winds the magnetic tape around a head drum. It is provided with a pair of slide members having a vertical guide and an inclined guide, and a pair of tension regulators for applying a tension by laterally urging the pulled-out magnetic tape with a tape guide.

The magnetic tape pulled out from the supply-side reel is wound around a head drum via a guide roller, a tape guide, a vertical guide and a tilt guide, and the magnetic tape exiting from this head drum has a tilt guide and a vertical guide. It passes between the capstan and the pinch roller via the tape, and is further wound around the winding side reel via the tape guide and the guide roller. A brake drum for controlling the tension of the magnetic tape is integrally provided on a reel base that rotatably supports the supply reel and the take-up reel. Brake bands are respectively hung on these brake drums, one end of each brake band is fixed to the mechanical chassis, and the other end is attached to each tension regulator.

As a reel stand of such a tape recording / reproducing apparatus, for example, one having a structure as shown in FIG. 12 is known. The reel base 60 is rotatably supported by a reel shaft 62 provided upright on a mechanical chassis 61, and a boss member 63 rotatably fitted to the reel shaft 62.
And a cap member 64 in which the cylindrical portion 64a is fitted to the cylindrical shaft portion 63a of the boss member 63, and the cap member 64.
The reel claw 65 is loosely fitted to the cylindrical portion 64a, and the coil spring 66 biases the reel claw 65 in a direction to separate the reel claw 65 from the boss member 63.

A male screw is provided on the outer peripheral surface of the cylindrical shaft portion 63a of the boss member 63, while a female screw capable of being screwed onto the male screw is provided on the inner peripheral surface of the cylindrical portion 64a of the cap member 64. The cap member 64 can be moved toward and away from the boss member 63 by screwing the cylindrical portion 64a onto the cylindrical shaft portion 63a. The end surface of the cap member 64 inside the cylindrical portion 64a is in contact with the upper end portion of the reel shaft 62 by the weight of the reel stand 60. And
The cap member 64 prevents the reel claw 65 from coming off due to the spring force of the coil spring 66.

Thus, when the cap member 64 is rotated with respect to the boss member 63 in the tightening direction, the cap member 6 is rotated.
Since the inner end surface of the cylindrical portion 64a of No. 4 is in contact with the upper end of the reel shaft 62, the cap member 64 rotates at that position, while the male thread of the cylindrical portion 64a is screwed onto the female thread of the cylindrical portion 64a. Therefore, the boss member 63 is pulled up. As a result, the boss member 63 moves toward the cap member 64, and the vertical position of the boss member 63 becomes higher. On the other hand, when the cap member 64 is rotated in the loosening direction, the boss member 63 is pushed down by the screw engagement of the female screw of the cylindrical portion 64a and the male screw of the cylindrical shaft portion 63a. As a result, the boss member 63 moves in the direction away from the cap member 64, so that the vertical position of the boss member 63 is lowered.
By rotating the cap member 64 in this manner, the height of the reel stand 60 can be adjusted.

[0007]

However, in the reel base 60 of the conventional tape recording / reproducing apparatus as described above, the boss member 63 and the cap member 64 are screwed together in order to enable height adjustment. The cap member 64 is used as a bearing member, and the inner end surface of the cylindrical portion 64a is used as a bearing surface to directly contact the upper end portion of the reel shaft 62. In this case, generally, the reel shaft 62 is formed of metal, while the cap member 64 is formed of synthetic resin, and the boss member 63 and the cap member 64 are formed.
When the cap member 64 rotates in an actual use state, the cap member 64 receives frictional torque in the rotational direction from the reel shaft 62, so that the contact surface of the cap member 64 is worn by the rotational contact between the cap member 64 and the reel shaft 62. Due to this, there is a problem that the height of the reel stand 60 changes to a lower side.

As a result, when the height of the reel stand 60 is lowered due to the wear of the cap member 64, the reel stand 60 is lowered.
The gap between the lower surface of the tape reel placed on and pushed up by the tape reel and the reel mounting surface of the cassette housing in which this tape reel is rotatably accommodated becomes narrower, and in extreme cases, the lower surface of the tape reel is It will rub against the reel mounting surface of the cassette housing. In particular, the wear of the contact surface of the cap member 64 has become remarkable under the recent increase in the tape winding speed.

Further, there is a strong demand for a tape cassette of a certain type to be thin, and therefore,
When the cassette is mounted, the gap between the bottom surface of the tape reel and the reel mounting surface of the cassette housing cannot be made large, and the center of rotation of the tape reel is slightly tilted due to the large diameter of the tape reel, which causes the effect. Appears largely at the outer peripheral edge, and the outer peripheral edge of the reel comes into contact with the reel mounting surface.

The present invention has been made in view of the above conventional problems, and a member having a high hardness is interposed between the contact surfaces of the rotating body and the rotation center axis so that the rotation body moves in the rotation direction from the rotation center axis. It is an object of the present invention to solve the above problems as a structure that does not receive friction torque and does not cause wear on a rotating body.

[0011]

In order to solve the above-mentioned problems and the like and to achieve the above-mentioned objects, the tape recording / reproducing apparatus of the present invention has a reel base rotatably supported by a rotation center shaft. A structure that includes a rotating body and a bearing body that is integrated with the rotating body in a rotation direction and that is disposed on the center line of the rotation center axis and is in rotary contact, and that supports the rotation body on the rotation center axis via the bearing body. It is characterized by

Since the present invention is configured as described above, since the friction torque in the rotation direction applied from the rotation center axis is received by the bearing body which is separate from the rotating body, the hardness of the rotating body is low. There is no possibility that the height of the rotating body will change even when using a rotating body, the wear resistance of the rotating contact portion can be sufficiently ensured, and a wide range of materials can be used as the rotating body.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a tape recording / reproducing apparatus of the present invention will be described below with reference to the drawings by taking an example in which it is applied to a video tape recorder (VTR) apparatus. 1 is a sectional view showing a state where a tape reel of a tape cassette is mounted on a reel stand showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the reel stand shown in FIG. 1, and FIG. 3 is a reel stand shown in FIG. 3 is an exploded perspective view, FIG. 4 is an explanatory view showing a cross section of a main part of FIG. 3, and FIG. 6 is a plan view showing a second embodiment of the shaft hole provided in the reel stand, FIG. 7 is a plan view showing the third embodiment of the shaft hole, and FIG. 8 is a plan view showing the fourth embodiment of the shaft hole. FIG. 9 is a plan view showing a fifth embodiment of the shaft hole, and FIG. 10 is a plan view of the tape running system of the tape recording / reproducing apparatus. Further, FIG. 11 is a sectional view of a guide roller showing another embodiment of the present invention.

First, the tape running system of the tape recording / reproducing apparatus will be described with reference to FIG. Reference numerals 1 and 2 are a pair of supply side reel base and winding side reel base arranged on the mechanical chassis 3. These reel stands 1 and 2 are
The tape supply side reel 5 and the tape winding side reel 6 of the tape cassette 4 shown by phantom lines are mounted.

Tape supply reel 5 of tape cassette 4
The magnetic tape T showing one specific example of the tape-shaped information recording medium pulled out is a tape guide 9 of the tension regulator 8 on the supply side from the guide roller 7, and a slide member 1.
It is helically wound from the inlet side of a head drum 13 having a magnetic head through a vertical guide 11 and an inclined guide 12 supported by 0. Then, the magnetic tape T wound around the head drum 13 is taken out from the outlet side of the head drum 13 and passed through the inclined guide 15 and the vertical guide 16, which are supported by the slide member 14, the capstan 17, and the pinch roller 18, and is wound up. Pass through the tape guide 20 of the tension regulator 19 on the side, and the guide roller 2
The tape running system is configured to be wound around the tape winding side reel 6 from 1.

Here, both slide members 10 and 14 are movable along slide grooves 22a and 22b formed in the mechanical chassis 3 by the operation of a link mechanism driven through a loading gear (not shown). , Fig. 10
It is possible to move between the loading position shown in and the opposite unloading position. And
In the loading position, both slide members 10, 14
Is abutted against the fixed blocks 23 and 24 and positioned.

The tension arm 25 of the supply side tension regulator 8 is rotatable about a rotation shaft 26 as a rotation fulcrum, and is biased by a coil spring 27 in a direction to increase the tension of the magnetic tape T which is stretched around the tape guide 9. are doing. Further, one end of a brake band 28 hung on the supply-side reel stand 1 is connected to the tension arm 25, and the other end of the brake band 28 is supported by a fixing pin 29 fixed on the mechanical chassis 3. .

The tension regulator 1 on the winding side is also provided.
9 also has a structure similar to that of the tension regulator 8 on the supply side, and its tension arm 30 is rotatable about a rotation shaft 31 as a rotation fulcrum. Then, the tension arm 30 is urged by the coil spring 32 in a direction in which the tension of the magnetic tape T hung over the tape guide 20 is increased. Further, one end of a brake band 33 hung on the take-up reel stand 2 is also connected to the tension arm 30, and the other end of the brake band 33 is supported by a fixing pin 34 fixed on the mechanical chassis 3. There is.

The supply-side reel stand 1 and the take-up reel stand 2 described above have the same shape and structure, and are rotatably supported by a reel shaft 35 as a rotation center shaft standing on the mechanical chassis 3. Has been done. Next, the supply side reel base 1 will be described in detail as a representative of the reel bases 1 and 2. As shown in FIGS. 1 to 5, the reel base 1 includes a rotating body 36, a reel claw 37, a height adjusting screw 38, a bearing body 39, and a coil spring 40. A height adjusting mechanism for adjusting the height is provided.

The rotating body 36 has an inner cylinder portion 41 having the same center line.
And an outer cylinder portion 42, and a reel base gear 43 that is commonly connected to one end of the both cylinder portions 41, 42 in the axial direction. The reel base gear 43 has an outer periphery for driving the reel base 1 to rotate. Teeth are provided all around. The pair of reel bases 1 and 2 are installed in the mechanical chassis 3 with a predetermined space therebetween, and the reel base gears 43 of both reel bases 1 and 2 are rotationally driven by a motor fixed to the mechanical chassis 3. A swinging gear (not shown) is selectively engageable.

Further, a brake drum 44 continuous with one surface of the reel base gear 43 is provided on the outer periphery of the outer cylinder portion 42 of the reel base 1.
The brake band 28 (or 33) is wound around the brake drum 44. A flange 44a for preventing the brake band 28 (or 33) from coming out is provided on the opposite side of the brake drum 44 from the reel base gear 43. And the outer cylinder part 4
An annular convex portion 42a continuous in the circumferential direction is provided on the end surface of the second reel base gear 43 on the opposite side, and as shown in FIG. 1, the tape cassette 4 is provided on the top of the annular convex portion 42a.
The tape reels 5 and 6 rotatably housed in the cassette housing 50 are mounted respectively.

At the center of the inner cylinder portion 41 of the reel stand 1, there is provided an axial hole 45 extending from the reel stand gear 43 side to a midway portion in the axial direction, and the inner cylinder portion opposite thereto. On the tip side of 41, a quadrangular hole 4 showing a specific example of a shaft hole that extends to an intermediate portion in the axial direction and communicates with the axial hole 45.
6 are provided. As shown in FIG. 5, the rectangular hole 46 has a square cross-sectional shape, and therefore, the distance from the hole center, which is the center of rotation, to the peripheral edge is not uniform on the four sides. This square hole 46
The length S of one side is slightly larger than the shaft diameter B of the reel shaft 35 (S> B). The length S of the square hole 46 may be the same as the shaft diameter B of the reel shaft 35 (S = B).

In the square hole 46 of the reel stand 1, a bearing body 39 is detachably fitted as a column body having a cross-sectional shape and size suitable for the square hole 46. That is, the bearing body 39
Is a rectangular parallelepiped whose cross-sectional shape is square. Therefore, the bearing body 39 fitted in the square hole 46 can move in the direction in which the hole extends, but cannot rotate in the circumferential direction of the hole. Has become. As a material of the bearing body 39, a material having high hardness and high wear resistance is suitable, and for example,
High-speed sliding wear-resistant grade of polyacetal (POM) (trade name LA541: manufactured by Asahi Kasei Co., Ltd.), oil-impregnated sintered alloy and the like are preferable. However, the material of the bearing body 39 is not limited to this, and various materials can be used as long as they have high hardness and high wear resistance.

Above the bearing body 39, the height adjusting screw 3 is provided.
The height adjusting screw 38 prevents the bearing body 39 from slipping out of the square hole 46. The height adjusting screw 38 includes a screw shaft portion 38a having a screw provided on the outer peripheral surface, a bearing shaft portion 38b having a smooth outer peripheral surface provided at the tip of the screw shaft portion 38a, and a screw shaft portion 38a.
And an umbrella-shaped screw head 38c provided at the base end of the. The shaft diameter of the bearing shaft portion 38b of the height adjusting screw 38 is formed smaller than the length S of one side of the square hole 46, so that the bearing shaft portion 38b is loosely fitted into the square hole 46.

On the other hand, the screw shaft portion 38a of the height adjusting screw 38
As shown in FIG. 5, the diameter D of the screw thread is larger than the length S of one side of the square hole 46 (D> S), and the diameter d of the screw valley is larger than the length S of one side of the square hole 46. Is formed so as to be small (S> d). As a result, the screw shaft portion 38a of the height adjusting screw 38 can be screwed into the square hole 46 of the inner cylinder portion 41, and at the time of this screwing, the male screw of the screw shaft portion 38a forms a thread groove on the four faces of the square hole 46. Will be installed. Therefore, the external threads of the screw shaft portion 38a are respectively screwed into the centers of the sides of the square hole 46 at four positions in the circumferential direction. This height adjustment screw 3
By changing the screwing amount of 8, the height of the rotating body 36 with respect to the reel shaft 35 can be freely adjusted as will be described later.

Further, an inner cylinder 48a and an outer cylinder 48b are formed at the front end of the inner cylinder portion 41 of the reel stand 1 by providing an annular groove 47 extending in the axial direction and having the same center line. . The inner cylinder 48a of the inner cylinder part 41 is the outer cylinder 48
The ring body 37a of the reel claw 37 is loosely fitted to the protruding portion of the inner cylinder 48a. Further, the coil spring 40 is loosely fitted in the inner cylinder 48a in a compressed state.
Has one end seated on the bottom surface of the annular groove 47 and the other end seated on the ring body 37 a of the reel claw 37. And
The spring force of the coil spring 40 urges the reel pawl 37 to be pushed outward, and also the ring body 37a.
Is restricted by the screw head 38c of the height adjusting screw 38 to prevent the reel claw 37 from slipping out.

Further, the ring main body 37a of the reel claw 37 is provided with three claw portions 37b at equal intervals in the circumferential direction, and these claw portions 37b project toward the outer cylinder 48b side. In order to allow the claws 37b of the reel claws 37 to enter, the outer cylinder 48b is provided with slits 49 extending in the axial direction corresponding to the claws 37b. At least a part of the claw portion 37b of the reel claw 37 is always loosely inserted into the slit 49. When the reel claw 37 is pressed against the biasing force of the coil spring 40, the ring body 37a is inserted into the annular groove 47. When it is inserted, the claw portion 37b is inserted in the slit 49, and the entire reel claw 37 can be depressed.

Incidentally, as the material of the rotating body 36 and the reel claw 37, for example, synthetic resin such as POM (polyacetal) is suitable. However, other synthetic resins, of course, other than synthetic resin, aluminum alloy, etc. Various materials can be used. Further, as the material of the height adjusting screw 38, for example, metal such as stainless steel or structural carbon steel is suitable, but various materials such as synthetic resin having high hardness can be used in addition to metal.

Thus, as shown in FIG. 2, the reel shaft 3
The bearing body 39 that is in contact with the tip of 5 is integrated with the rotating body 36 in the rotation direction by the square hole 46, while the distance between the reel shaft 35 and the height adjusting screw 38 that face each other with the bearing body 39 interposed therebetween is Since it does not change, when the height adjusting screw 38 is tightened, the inner cylinder portion 41 is relatively moved according to the tightening amount.
Approaches the height adjusting screw 38, and the gap X between the screw head portion 38c and the tip of the inner cylinder portion 41 becomes smaller. Therefore, the reel base 1 is lifted by tightening the height adjusting screw 38, and the position of the tape reel mounted on the annular convex portion 42a of the reel base 1 becomes higher. As a result, the tape guide 9
The magnetic tape T which is guided and guided by the tape is pulled out and wound up at a high position.

On the other hand, when the height adjusting screw 38 is loosened and retracted, the bearing body 39 also retracts, so that the gap X becomes wider according to the amount of rotation of the height adjusting screw 38, and the inner cylinder portion 41 moves away from the height adjusting screw 38, that is, downward in FIG. As a result, the height adjusting screw 38
The reel base 1 is pushed down by loosening, and the position of the tape reel mounted on the annular convex portion 42a of the reel base 1 is lowered. As a result, the magnetic tape T which is guided by the tape guide 9 and the like is pulled out and wound up at a low position. In this way, by rotating the height adjusting screw 38 to the right or left, it is possible to freely adjust the height of the pair of reel stands 1 and 2.

The tape guides 9 and 20, the tension arms 25 and 30, the coil springs 27 and 32, and the brake bands 28 and 33 control the rotation of the pair of reel stands 1 and 2 to adjust the tape tension. Mechanical tension regulators 8 and 19 are configured.
These mechanical tension regulators 8 and 19 apply an appropriate amount of tension to the magnetic tape T drawn from the tape cassette 4 on the upstream side and the downstream side of the capstan 17, respectively. Is being prevented.

The operation of the tape recording / reproducing apparatus having such a structure is as follows, for example. Now, when the tape cassette 4 is set at a predetermined position on the mechanical chassis 3, the tape supply reel 5 is placed on the supply reel stand 1 and the tape take-up reel 6 is placed on the take-up reel stand 2. Then, each of them can be rotated integrally. At the same time, the pair of slide members 10 and 14 slide toward the head drum 13 side, and the tension arms 25 and 30 of the pair of tension regulators 8 and 19 are separated from each other about the rotating shafts 26 and 31. The magnetic tape T is unfolded by rotating outward.

As a result, a part of the magnetic tape T is wound around the head drum 13 by the pair of vertical guides 11 and 16 and the inclined guides 12 and 15, and the tape guides 9 and 20 at the tips of the tension arms 25 and 30 are used. Tension of appropriate strength is applied to the magnetic tape T, and a loading state as shown in FIG. 10 is obtained. When the capstan motor is driven to rotate the capstan 17 from such a state, the magnetic tape T is sent from the supply side to the winding side by the frictional force with the pinch roller 18, and the tape supply side reel 5 side The magnetic tape T is wound around the tape winding reel 6 via the head drum 13 and the like.

During such tape running, one take-up reel stand 2 is rotationally driven by the driving force input from the reel stand gear 43, and the other supply reel stand 1 is rotated by the pulling force of the magnetic tape T. Driven. As a result, the reel bases 1 and 2 rotate around the reel shaft 35, and the magnetic tape T drawn from the supply-side reel 5 is wound around the winding-side reel 6. At this time, in each reel stand 1 and 2,
The rotating body 36 rotates about the reel shaft 35, and the height adjusting screw 38 and the bearing body 39, which are integrated with the rotating body 36 in the rotation direction, also rotate integrally. As a result, the inner peripheral surface of the axial hole 45 of the rotating body 36 makes sliding contact with the outer peripheral surface of the reel shaft 35, and the lower surface of the bearing body 39 is connected to the reel shaft 35.
Makes rotational contact with the tip of.

In this case, the bearing body 39 receives the friction torque in the rotating direction from the reel shaft 35 as the rotating body 36 rotates in the actual use state. This friction torque increases with an increase in the number of revolutions, and particularly in the recent trend of increasing the tape winding speed, the friction torque received by the bearing body 39 becomes extremely large.

However, the bearing body 39 is independently formed of a member separate from the rotating body 36, and in particular, the material of the bearing body 39 is polyacetal (POM) high-speed sliding wear-resistant grade (trade name LA541). Since it is used, even if the friction torque that the bearing body 39 receives from the reel shaft 35 is large, there is no fear that the sliding surface of the bearing body 39 will be worn by it. Therefore, there is no fear that the bearing body 39 will be worn by the friction torque received from the reel shaft 35 associated with high-speed tape fast-forwarding and tape rewinding as well as normal tape feeding, and the reel bases 1, 2 can be used for a long period of time.
It is possible to eliminate the possibility that the height of the will change.

Further, in the conventional reel stand 60 as shown in FIG. 12, the material of the cap member 64 is limited to a certain range due to reasons such as processing. In the trend of increasing the speed, there has been a problem that the wear resistance of the cap member 64 cannot be sufficiently secured. However, according to the reel bases 1 and 2 having the structure as in this embodiment, the reel shaft is The bearing body 39 that receives the friction torque from the rotor 35 and the rotating body 36 provided with the reel base gear 43 and the like are formed by separate and independent members, and the materials corresponding to the respective purposes are used as the bearing body 39 and the rotating body. 36 can be used. Therefore, for the reel bases 1 and 2, materials that are easy to process are used, and the bearing body 3
With respect to No. 9, it is possible to use a material that places importance on hardness and strength rather than workability. Therefore, it is possible to obtain the reel stands 1 and 2 having sufficiently large abrasion resistance.

As a result, the contact surface of the bearing member 39 is not abraded even by the rotational contact between the bearing member 39 and the reel shaft 35, and therefore the height of the rotating body 36 is not lowered. As shown in FIG. 3, the lower surface 5 of the tape reels 5 and 6 placed on the reel stands 1 and 2 and pushed up.
The gap Y between a and the reel mounting surface 50a of the cassette housing 50 in which the tape reels 5 and 6 are rotatably accommodated
Does not become narrow, and the predetermined gap Y can be maintained for a long period of time. Therefore, the lower surfaces of the tape reels 5 and 6 do not rub against the reel mounting surface 50a of the cassette housing 50 in spite of the increased tape winding speed and the like, so that the height of the reel bases 1 and 2 can be adjusted. The reliability can be improved and the cassette can be made thinner.

Incidentally, as the shape of the shaft hole provided in the inner cylindrical portion 48a for rotating the bearing body 39 integrally with the rotating body 36, the shapes shown in FIGS. 6 to 8 can be applied. The shaft hole shown in FIG. 6 is a pentagonal pentagonal hole 52.
8 is a hexagonal hexagonal hole 53, and the shaft hole shown in FIG. 8 is an octagonal octagonal hole 54. In this case, the bearing bodies fitted in these shaft holes 52 to 54 are pentagonal columns in the case of FIG. 6, hexagonal columns in the case of FIG. 7, and octagonal columns in the case of FIG. It is formed as a column corresponding to the shape of the hole. Also, although not shown, as long as it is a polygonal hole, it is not limited to those having these angles, and various polygons such as a triangle, a heptagon, and a decagon can be applied. Bearing body 3
9 can be rotationally driven integrally with the rotating body 36.

Furthermore, as the shape of the shaft hole, as shown in FIG. 9, a circular hole 55 may be applied. In this case, the circular hole 55 is eccentrically provided in the inner cylindrical portion 48a so that the distance from the center of rotation to the peripheral edge of the shaft hole is not uniform. That is, the circular hole 55 is formed such that its center line C has an eccentric amount E with respect to the axial center line L of the inner cylindrical portion 48a. In the circular hole 55, a cylindrical bearing body as a column body corresponding to this is fitted.

When the shaft hole has a circular shape as described above, the inner cylindrical portion 48a, which is a part of the rotating body 36, rotates about the axis L, so that the eccentric amount E is formed. The formed circular hole 55 rotates so as to draw a circle with the eccentric amount E as a radius. Therefore, even with the circular hole 55, the bearing body inserted in the circular hole 55 can be rotated integrally with the rotating body 36. The shaft hole may have an elliptical shape, and the bearing body at this time is an elliptic cylinder. In this case, it is not necessary to provide the eccentricity amount E, and as in the embodiment of FIGS.
The center of the hole can be aligned with the axis L of the inner cylindrical portion 48a.

In the embodiment shown in FIG. 11, the present invention is applied to a guide roller for guiding the magnetic tape T in the middle of the tape running system. The guide rollers 7 and 21 include a roller body 56 as a rotating body, a height adjusting screw 38, and a bearing body 39.
8 and the bearing body 39 are the same as those in the first embodiment. The roller body 56 is provided with an axial hole 57 and a square hole (axial hole) 58 at the center thereof. The rotation center shaft 51 erected on the mechanical chassis 3 is inserted into the axial hole 57 of the roller body 56, and the square hole 5 is formed.
A bearing body 39 is fitted to the shaft 8, and the bearing body 39 is pressed to the rotation center shaft 51 side by the height adjusting screw 38. Further, outwardly facing flanges 59a and 59b are provided on the upper and lower ends of the roller body 56, and the flanges 59a and 59b prevent the magnetic tape T from coming off.

Thus, according to the embodiment of the guide rollers 7 and 21, the present invention can be used in the middle of the tape running system, and by applying such a constitution, it is also applied to the reel stands 1 and 2. As in the case, it is possible to obtain a tape guide member having high abrasion resistance that enables the tape winding speed to be increased.

As described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, a tape recording / reproducing apparatus using a magnetic tape as an information recording medium has been described. Of course, it can be applied to a dedicated device for performing only one of the reproduction.
Furthermore, although an example in which a magnetic tape is used as the information recording medium has been described, various tape-shaped information recording media capable of recording information in another recording format such as a paper tape for punching can be used. You can

Further, in the above-mentioned embodiment, an example in which the reel bases 1 and 2 and the guide rollers 7 and 21 as tape guide members are applied has been described, but the present invention is not limited to this, and, for example, a tape guide. It can be applied to various tape guide members having the same structure such as 9, 20 and the like. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0046]

As described above, according to the tape recording / reproducing apparatus of the present invention, since the rotating body is supported by the rotation center shaft via the bearing body, the direction of rotation given from the rotation center axis is changed. The friction torque can be received by the bearing body that is separate from the rotating body. Therefore, the wear resistance of the rotating contact portion can be sufficiently enhanced, and the reliability of height adjustment of the reel stand or the like can be improved. Moreover, it is possible to contribute to the increase of the tape winding speed in the tape recording / reproducing apparatus, and therefore,
The effect that the tape rewinding time and the search access time can be shortened is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state where a tape reel of a tape cassette is mounted on a reel stand of a tape recording / reproducing apparatus showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the reel stand shown in FIG. 1 of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 3 is an exploded perspective view of the reel stand shown in FIG. 2 of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 4 is an explanatory view showing a cross section of a main part of FIG. 3 of a tape recording / reproducing apparatus showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. 2 of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 6 is a plan view showing a second embodiment of the shaft hole provided in the reel stand of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 7 is a plan view showing a third embodiment of the shaft hole of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 8 is a plan view showing a fourth embodiment of the shaft hole of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 9 is a plan view showing a fifth embodiment of the shaft hole of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 10 is a plan view of a tape running system of a tape recording / reproducing apparatus showing an embodiment of the present invention.

FIG. 11 is a cross-sectional view of a guide roller of the tape recording / reproducing apparatus showing the embodiment of the present invention.

FIG. 12 is a sectional view showing a reel stand of a conventional tape recording / reproducing apparatus.

[Explanation of symbols]

1, 2 reel stand, 3 mechanical chassis, 4 tape cassette, 5 supply reel, 6 winding reel,
7, 21 Guide roller, 8, 19 Tension regulator, 9, 20 Tape guide, 13 Head drum, 35 Reel shaft (rotation center shaft), 36
Rotating body, 37 reel claw, 38 height adjusting screw,
39 bearing body, 40,58 coil spring, 41 inner cylinder part, 42 outer cylinder part, 43 reel stand gear, 46,
58 Square Hole (Shaft Hole), 51 Rotation Center Axis, 52
Pentagonal hole (shaft hole), 53 hexagonal hole (shaft hole), 5
4 octagonal hole (shaft hole), 55 circular hole (shaft hole), 5
6 Roller body (rotating body), T Magnetic tape (tape-shaped information recording medium)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaki Takase 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Akihiro Uetake 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (72) Inventor Katsuaki Ikema 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Kayoshi Suzuki 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo -Inside the corporation

Claims (4)

[Claims] 1. A tape recording / reproducing apparatus in which a tape-shaped information recording medium is drawn out from a pair of tape reels respectively mounted on a pair of reel bases and wound around a head drum, wherein the reel bases are rotated about a rotation center axis. A rotatably supported body, and a bearing body that is integrated with the rotator in the direction of rotation and that is arranged on the center line of the rotation center axis and makes rotational contact, and the rotation center is provided via the bearing body. A tape recording / reproducing apparatus having a structure in which a rotating body is supported by a shaft. 2. The tape recording / reproducing apparatus according to claim 1, wherein the reel base is rotatably supported by a rotation center shaft fixed to a mechanical chassis, and is integrally formed with the rotary body in a rotation direction. And a bearing body that is disposed on the center line of the rotation center shaft and is in rotary contact with each other, and a height adjusting screw that is screwed onto the rotation body and that can press the bearing body toward the rotation center shaft side. A tape recording / reproducing device, wherein the height position of the rotating body can be adjusted by the height adjusting screw. 3. The tape recording / reproducing apparatus according to claim 1, wherein the rotating body is provided with a shaft hole in which the distance from the center of rotation to the peripheral edge is not uniform, and the bearing body is a column body fitted in the shaft hole. A tape recording / reproducing apparatus, characterized in that the rotary body and the bearing body are integrated in the rotational direction by fitting a bearing body into the shaft hole. 4. The tape recording / reproducing apparatus according to claim 1, wherein the rotating body is provided with a polygonal shaft hole, and the bearing body is formed into a polygonal column that fits in the shaft hole. A tape recording / reproducing apparatus, characterized in that a bearing body is fitted to the rotary body and the bearing body is integrated in the rotation direction.