JPS61243923A - Tape guide drum device - Google Patents

Abstract

PURPOSE:To execute efficiently an adjusting work by constituting each rotary magnetic head of the first set and the second set, so that each adjustment of its projecting quantity, a 180 deg. relative position and a height position can be operated from the upper face side of the rotary drum. CONSTITUTION:By inserting an adjusting member 40 into position adjusting holes 35, 36 and 37, respectively, from the upper face side of a rotary drum 12, and rotating it suitably, an eccentric part 1c pushes side edges 28c, 28d, and a rear edge 28e of a large size supporting member 28, and adjusts a position of a rotary head 31. Also, by inserting a projecting part 41b of an adjusting member 41 into position adjusting holes 32, 33 and 34 from the upper face side of the rotary drum 12, and rotating it suitably, the eccentric shaft 41c pushes side edges 24c, 24d, and a rear edge 24e of a small size supporting member 24, and adjusts a position of a rotary head 21. Also, by inserting L-shaped screw-drivers 42, 43 into a recessed part 21, and engaging it to height adjusting screws 27, 38, respectively, and rotating them, a height of the rotary magnetic heads 21, 31 is adjusted. Other magnetic heads 22, 32 are also adjusted in the same way. In this way, the adjusting work can be executed efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape guide drum device, and particularly to a tape guide drum device in which the height of a rotating magnetic head is increased so as to record different types of signals in areas separated in the width direction of a magnetic tape. The present invention relates to a tape guide drum device having a different configuration.

Conventional technology The present applicant previously filed Japanese Patent Application No. 60-35827 and Japanese Patent Application No. 60-35827.
No. 0-35828 "Color video signal recording/reproduction 1i [J" was proposed. Figure 15 shows a tape guide drum device applied to this device, and Figure 16 shows a color video signal formed on a magnetic tape by this tape guide drum device. This shows the track pattern.

In Fig. 15, 1 is a rotating drum, with a rotating magnetic head 2+ (22) for color signals spaced 180 degrees above, and 1 below.
Rotating magnetic heads 31 (32) for brightness signals separated by 80°
are set up with steps.

4 is a fixed drum, and a reed 4a is provided.

The magnetic tape 5 is guided by a lead 4a and runs attached to the rotating drum 1 and the fixed drum 4. As a result, as shown in FIG. 16, the FM luminance signal is recorded in the predetermined width area W+ at the upper and lower sides in the tape width direction of the 172-inch wide magnetic tape 5 by the luminance signal rotating magnetic heads 31 and 32. The first tracks 6Y are inclined at an angle θ with respect to the longitudinal direction of the tape and are sequentially formed without guard bands.On the other hand, in the upper predetermined width area W2, FM color difference is recorded by the rotating magnetic heads 21 and 22 for color signals. Second tracks 6c on which signals are recorded are sequentially formed at an angle θ with respect to the longitudinal direction of the tape without guard bands.

Further, in FIG. 16, tracks 7+*72*81 and 82 recorded along the longitudinal direction of the magnetic tape 5 are tracks recorded and formed by a dedicated fixed head, and 7+ and 72 are tracks recorded and formed along the longitudinal direction of the magnetic tape 5. 8+ is an audio track where the audio signal of the second channel is recorded, 8+ is a time code track where a time code for knowing the position information on the tape is recorded, and 82 is a control track where a control pulse of a constant period is recorded. .

Problems to be Solved by the Invention Since the tape guide drum device described above has two sets of rotating magnetic heads arranged at different heights, it is easy to adjust the position of each rotating magnetic head, and serviceability is not impaired. Therefore, special measures are required regarding the mounting structure of the rotating magnetic head.

It is an object of the present invention to provide a tape guide drum device that has been made in consideration of the above.

Means for Solving the Problems The present invention provides a recessed portion on the upper surface of a rotary drum, a first set of support members supporting a first set of rotary magnetic heads, and a second set of support members supporting a second set of rotary magnetic heads. The supporting members of the first set are attached to the bottom surface of the recessed part, the supporting members of the second set are attached to the lower surface of the rotating drum, and the supporting members of the first set and the supporting members of the first set are attached to the bottom surface of the rotating drum. The position adjustment holes for adjusting the positions of the two sets of rotating magnetic heads are all opened on the side to which the smaller supporting member of the first and second sets of support members is attached. This is what I did.

The recess on the upper surface of the active rotating drum allows the first set of rotating magnetic heads and the second set of rotating magnetic heads to be arranged at different heights, and for supporting the first set without removing the second set of supporting members. It is possible to remove only the member, and the position adjustment hole is opened from either the upper surface or the lower surface of the rotating drum.
The positions of the first set and the second set of rotating magnetic heads can be adjusted.

Embodiments Next, embodiments of the tape guide drum device according to the present invention will be described.

FIGS. 1 and 2 each show an embodiment of the tape guide drum device according to the present invention.

As shown in each figure, the tape guide drum device 10 roughly consists of a lower fixed drum 11 and an upper rotating drum 12 that rotates in the six directions of arrows.

The rotary drum 12 has a first set of rotary magnetic heads 2+ for color signals at a height H1 in the axis Z direction.
+22, height position! 2, a second set of rotating magnetic heads 31 and 32 for brightness signals are attached. The rotating magnetic heads 21 and 31 and 22 and 32 are arranged at predetermined angular intervals, for example, 1 in the circumferential direction of the rotating drum 12, respectively.
They are arranged at intervals of 80 degrees and are aligned in the axis Z direction. A flywheel 15 is fitted and fixed to a shaft 14 supported by bearings 13a and 13b, and the rotating drum 12 is fitted to and fixed to the shaft 14. 16 is the first rotary transformer.

A second rotary transformer 17 sends and receives signals to and from the rotating magnetic heads 2+, 22 and 3+, 32, respectively.

The magnetic tape 5 is wound spirally around the tape guide drum device 10 over an angular range of just over 180 degrees determined by the guide balls 18 and 19, and is guided by the lead 20 at the - side edge in the direction of arrow B. Run to. The rotating magnetic heads 2+, 22.3+, 32 scan the magnetic tape 5,
A track pattern as shown in FIG. 16 is formed on the magnetic tape 5.

Next, a structure for attaching the rotating magnetic heads 2+, 22.3+, and 32 to the rotating drum 12 will be described with reference to FIGS. 3 to 9.

In FIGS. 1 to 3, reference numerals 21 and 22 each indicate four parts, which are formed near the outer periphery of the upper surface 12a of the rotating drum 12 and at positions facing each other in the radial direction.

The bottom surfaces 21a and 22a of the recesses 21 and 22 serve as mounting surfaces for the rotating magnetic heads 2+ and 2z, respectively. Concave 1!21
The depth dimension a in (22) is determined so that a thickness approximately corresponding to the above-mentioned dimension of the rotating drum 12 remains. 2
3 is a head window, which has the above-mentioned recess 21 on the circumferential surface of the rotating drum.
It is connected and formed. Another recess 22 also has a head window (
(not shown) is formed.

Note that the lower surface 12b of the rotary drum 12 is used as a mounting surface for other rotary magnetic heads 3+, 32 in the state as it is.

As shown in FIGS. 5(A) and 5(B), the rotating magnetic head 21 has a width W1. Small size support member 2 with length [1 size
It is fixed and supported by 4.

As shown in FIGS. 1 to 3, this small-sized support member 24 has left and right mounting holes 24a, 24b connected with screws 25 and 26.
The rotary magnetic head 21 is screwed to the bottom surface 21a of the recess 21, and the head surface side of the rotating magnetic head 21 protrudes from the head window 23. Further, a height adjustment screw 27 is screwed into the small size support member 24 .

The rotating magnetic head 31 has a width W2 as shown in FIG.
(>W+), and is fixed and supported by a large-sized support member 28, which is one size larger than the small-sized support member 24 and has a length L2 (>Ll). As shown in FIGS. 1 to 4, this large-sized support member 28 is attached to the lower surface 12b of the rotary drum 12 by screwing left and right attachment holes 28a and 28b with screws 29 and 30. The head surface side of the magnetic head 31 protrudes from the notch 31 of the rotating drum 12.

With the rotating magnetic heads 21 and 31 attached as described above, the small size support member 24 and the large size support member 28 are connected to each other, as shown in FIGS. 2 and 4. Left and right side edges 28c, 28d and rear edge 28e
are the left and right side edges 24c, 24 of the small size support member 24, respectively.
d and the rear edge 24e.

32, 33, and 34 are rotating magnetic helads 21 with diameters di, respectively.
As shown in FIGS. 1 and 2, these are MWA holes for general use, and are formed at locations that open in the bottom surface 21a of the recess 21 and face the side edge 24C124d and rear edge 24e of the small-sized support member 24. It is.

35, 36, and 37 are rotating magnetic heads 31 each having a diameter of d2.
As shown in FIGS. 1 to 4, it is a position adjustment hole formed at a location that passes through the rotating drum 12 in its axial direction and faces the m edge 28C928d and the rear edge 28e of the large size support member 28. It is.

That is, each of the position adjustment holes 32 to 37 is formed with an opening on the upper surface side of the rotating drum 12. 38 is a height adjustment screw for the rotating magnetic head 31, which is attached to the bottom surface 21 of the recess 21.
A screw hole 39 opened in the rotating drum 12 and formed in the rotary drum 12
are screwed together.

The position adjustment of the rotary magnetic heads 3I and 2I is performed as shown in FIG. 9 using adjustment members 40, 41 shown in FIGS. 7 and 8. The adjustment member 40 includes a disc-shaped knob 40a, a shaft 40b having a diameter of d2, and a protrusion 40c that projects eccentrically from the tip of the shaft 40b. As shown in FIG. 9, by inserting this adjustment member 40 into the position adjustment hole 37 from the upper surface side of the rotating drum 12 and rotating it appropriately, the eccentric protrusion 40G is adjusted to the rear edge 28 of the large-sized support member 28.
By pressing e, the large-sized support member 28 is displaced toward the outer circumference of the rotating drum 12, and the amount of protrusion of the rotating magnetic head 31 is adjusted. Moreover, when the adjustment member 40 is inserted into the position adjustment hole 35 or 36 and rotated appropriately, the eccentric protrusion 40C is aligned with the side edge 2.
8c or 28d, the large size support member 28 is displaced in the circumferential direction of the rotating drum 12, and the rotating magnetic head 31
The 180 degree relative position of is adjusted.

As shown in FIG. 8, the adjustment member 41 includes a disc-shaped knob 41a, a protrusion 41b having a diameter of dl, and a shaft 41C eccentric with respect to the protrusion 41b. This adjusting member 41 is connected to the rotating drum 1 as shown by the two-dot chain line in FIG.
The eccentric shaft 41C pushes the rear edge 24e of the small size support member 24 by inserting the protrusion 41b into the position adjustment hole 37 and rotating it appropriately.
The small-sized support member 24 is displaced toward the outer circumference of the rotating drum 12, and the amount of protrusion of the rotating magnetic head 21 is adjusted. Furthermore, when the protrusion 41b is inserted into the position adjustment hole 32 or 33 and rotated appropriately, the eccentric shaft 41C pushes the side edges 24c and 24d, and the small-sized support member 24 is displaced in the circumferential direction of the rotating drum 12. Then, the 180 degree relative position of the U-rotation magnetic head 21 is adjusted.

In addition, as shown by the two-dot chain line in FIG. rotates in the screw-in direction or in the opposite direction to push the bottom surface 21a, and the small-sized support member 24 squeezes, and the height position of the rotating magnetic head 21 is adjusted.
3 into the recess 21 and further into the screw hole 39 to engage and rotate the height adjustment screw 38,
The height adjustment screw 38 rotates in the screwing direction or in the opposite direction to push the large size support member 28, which bends.
The height position of the rotating magnetic head 31 is adjusted.

As mentioned above, although the rotating magnetic heads 2I and 31 are aligned in the axial direction of the rotating drum 1, the protrusion amount, 180 degree relative position, and height position of each rotating magnetic head 2+ and 3+ are as follows. Both can be adjusted with good workability by operating from the upper surface side of the rotating drum 12.

The other rotating magnetic heads 2z and 32, as shown in FIG. are given the same reference numerals as the subscripts, and their explanations will be omitted.

Further, the above position adjustment is performed with the rotating drum 12 attached to a jig.

Further, in the tape guide drum device 10 described above,
When replacing the upper rotary magnetic heads 2+ and 22, there is no need to remove the lower rotary magnetic heads 3+ and 32; instead, the rotary magnetic heads 21 and 22 can be replaced with the rotary magnetic heads 3+ and 32 still attached. This makes it possible to improve maintenance serviceability.

Also, each rotating magnetic head 2+, 22.3+.

Wire pulled out from 32 (not shown) and wire pulled out from 〇-Tali transformer 16.17 (not shown)
is connected to the upper surface side of the rotating drum 12. Therefore, especially when pulling out the wire from the upper rotary magnetic heads 2+ and 22 to the upper surface of the rotating drum 12, the wire can be simply pulled out from the recesses 21 and 22, and there is no need to worry about passing the wire through the hole, making the wire pulling operation easy. It will be held in

Next, another embodiment of the tape guide drum device according to the present invention will be described with reference to FIGS. 10 to 14.

As shown in each figure, the tape guide drum device 50 of this embodiment has a large-sized recess 52 formed on the upper surface 51a side of the rotating drum 51, and a large-sized support member 52 formed on the bottom surface 52a.
8 with screws 53 and 54, and the rotating drum 51
Attach the small size support member 24 to the lower surface 51b of the screws 55, 56.
In each figure, the same reference numerals are given to the parts that substantially correspond to the claw component parts in FIGS. 1 and 2, and the explanation thereof will be omitted. In this embodiment, the color signal rotating magnetic head 21 is fixed to the large size support member 28, and the brightness signal rotating magnetic head 31 is fixed to the small size support member 24.

Reference numerals 57, 58, and 59 are position adjustment holes for the rotating magnetic head 21, and the recessed portion 5 is
It is formed so as to open at the bottom surface 52a of the second support member 28 and face the edge of the large size support member 28.

Reference numerals 60, 61, and 62 are position adjustment holes for the rotating magnetic head 31, which are formed at positions facing the edge of the small-sized support member 24 on the bottom surface 51a of the rotating drum 51.

As shown in FIG. 14, the protrusions and 180 degree relative positions of the rotating magnetic heads 2+ and 3+ are determined by inserting the adjusting member 4o into the position adjusting hole 59 (5) with the rotating drum 51 upside down.
7, 58) and rotated as appropriate, or by inserting the adjustment member 41 into the position adjustment hole 62 (60, 61) and rotated as appropriate in the same manner as described above. Also, the height positions of the rotating magnetic heads 2+ and 3+ are as follows:
Adjustments are made in the same manner as described above by turning the height adjusting screws 65, 66 using L-shaped screwdrivers 63, 64, respectively.

Further, the tape guide drum device 50 described above, like the tape guide drum device 10 described above, has excellent adjustment workability and maintenance serviceability.

Effects of the Invention As described above, according to the tape guide drum device of the present invention, the first set of rotating magnetic heads and the second set of rotating magnetic heads are substantially aligned in the axial direction of the tape guide drum device and are provided at different heights.
The positions of the sets of rotating magnetic heads can be individually adjusted, and this position adjustment can be performed from either the upper surface or the lower surface of the rotary drum. As a result, the adjustment work can be made more efficient. Since the second set of rotating magnetic heads can be attached and detached independently without the need to remove the separate sets of rotating magnetic heads, the rotating magnetic heads can be easily replaced and maintenance serviceability can be improved. When pulling out the wire of the upper rotating magnetic held to the top surface of the rotating drum for connection, the wire can be simply pulled out from the recess, without the hassle of passing it through the hole.
It has the advantage of being easy to process wires.

[Brief explanation of the drawing]

1 and 2 are a partially longitudinal front view and a plan view, respectively, of an embodiment of the tape guide drum device according to the present invention, and FIG. 3 shows a rotating drum taken out from FIG. FIG. 4 is a bottom view of the rotating drum, and FIG.
Figure (A) is a plan view of a small-sized support member that supports a rotating magnetic head, Figure 5 (B) is a sectional view taken along the line VB-VB in Figure 5 (A), and Figure 6 is a plan view of a small-sized support member that supports a rotating magnetic head. 7 and 8 are perspective views showing different adjusting members, respectively. FIG. 9 is a diagram showing the situation when adjusting the positions of the upper and lower rotary magnetic heads. Figures 10 and 11
12 is a partial vertical sectional view and a partial plan view of another embodiment of the tape guide drum device of the present invention, FIG.
Figure 3 is a partial bottom view of the rotating drum, Figure 14 is a diagram showing the position adjustment of the upper and lower rotating magnetic heads, and Figure 15 is a diagram showing the position adjustment of the upper and lower rotating magnetic heads.
The figure is a schematic diagram of a tape guide drum device applied to a magnetic recording and reproducing device previously filed by the present applicant, and FIG. 16 is a diagram showing a track pattern formed on a magnetic tape by the device of the earlier application. . 2+, 22...Rotating magnetic head for color signal, 31°3
2... Rotating magnetic head for brightness signal, 5... Magnetic tape, 10.50... Tape guide drum device, 11.
... Fixed drum, 12.51 ... Rotating drum, 12a
. 51a...Top surface, 12b, 51b...Bottom surface, 16.
...First rotary transformer, 17...Second rotary transformer, 21.22.52...Concavity, 21a, 2
2a. 52a...bottom surface, 24...small size support member, 27
゜38.66...Height adjustment screw, 28...Large size support member, 32-37.57-62...Position adjustment hole,
40.41...adjustment member, 42.43.64.66.
··screwdriver. Figure 3 Figure 4 Dan W, Figure 13 Next Figure 15

Claims (3)

[Claims] (1) A fixed drum, a rotating drum above the fixed drum, and predetermined angular intervals in the circumferential direction of the rotating drum so that different information signals are recorded in areas separated in the width direction of the magnetic tape. One set includes a pair of rotating magnetic heads arranged at a distance from each other, and two sets of rotating magnetic heads are arranged approximately in the axial direction of the rotating drum and at different heights. A tape guide drum device that guides the tape to travel while being attached to the rotating drum, the device having a recess formed on the upper surface of the rotating drum, and a first set of rotating magnetic heads attached to the bottom surface of the recess to support a first set of support members; a second set of support members having different sizes from the first set of support members, supporting a second set of rotating magnetic heads and attached to the lower surface of the rotating drum; , formed on the rotating drum corresponding to the first and second sets of support members, respectively, with the side to which the smaller supporting member of the first and second sets of support members is attached as an opening. A tape guide drum device comprising a position adjustment hole. (2) The first set of support members and the second set of support members are smaller in size than the latter, and the position adjustment holes are both formed to open on the upper surface of the rotating drum. A tape guide drum device according to claim 1, characterized in that: (3) The first set of support members and the second set of support members are smaller in size than the former, and the position adjustment holes are both formed to open at the lower surface of the rotating drum. A tape guide drum device according to claim 1, characterized in that: