JPH0652606B2 - Tape winding and collecting device in recording and reproducing device - Google Patents

Description

Detailed Description of the Invention

(Field of Industrial Application) The present invention relates to an apparatus for recording a signal on a magnetic tape or reproducing a signal from the magnetic tape, and a magnetic tape which has been pulled out to a predetermined tape running path after recording / reproducing. The present invention relates to a device for collecting in a cassette. (Prior Art) In recent years, downsizing of video tape recorders (VTRs) has been progressing, especially 8 mm VT using a magnetic tape with a width of 8 mm.
In R, an ultra-compact and lightweight one has been realized. Along with the reduction in size and weight of the VTR, a camera-integrated VTR having a camera section and a VTR section has been put into practical use.
Also, by integrating the liquid crystal color television and VTR,
It is also possible to realize a portable image reproduction system. In such a VTR, there are severe demands for further miniaturization. Therefore, as shown in FIGS. 41 and 42, there has been proposed a VTR capable of expanding and contracting the depth length of the device along the cassette insertion direction according to the mode (Japanese Patent Laid-Open No. 61-271648).

[G11B1
5/665]). In the above VTR, a head equipped with a rotating magnetic head
The cylinder (11) is installed on the main chassis (1),
On the main chassis (1), the reel chassis (2)
Can be slid toward and away from the head cylinder (11)
No. 1 supply reel stand on the reel chassis (2)
A (21) and a take-up reel stand (22) are provided. reel
The chassis (2) is driven on the main chassis (1).
Chassis drive mechanism linked to the boarding motor (not shown)
Omitted). It also drives the supply reel stand (21) and the take-up reel stand (22).
Swing idler linked to the capstan motor
A well-known reel base drive mechanism including In the standby mode shown in FIG. 41, reel reel
Part (A) of chassis (2) from main chassis (1)
It is protruding, and in this state the reel on the reel chassis (2)
The tape cassette (150) is loaded on the bases (21) (22). In the play mode shown in FIG. 42, the reel chassis
(2) slides to the head cylinder (11) side,
The head cylinder (11) invades the opening (B) of the unit (150).
It is included. In this state, the magnetic tape is the head cylinder
It is wound around (11) and the signal is recorded or reproduced. Therefore, in the above VTR, the depth length is as shown in the figure.
L ₁ To L _Two It is convenient to carry because it can be shortened to
Is. Applicant is on the main chassis (1) as in the above VTR
The reel chassis (2) is slidably arranged on the
A pinch roller crimping mechanism with a configuration different from the conventional one as described later
Invented a VTR equipped with the like (see FIGS. 5 to 7).
See). In the VTR, loading motor (31) and tape
An intermittent rotation mechanism is installed between the loading mechanism (5).
Be done. The intermittent rotation mechanism is a reel shown in FIGS. 5 to 6.
While the chassis (2) is moving, it will be in a rotation transmission state, and
Just before the reel chassis (2) reaches the moving end in FIG.
The rotation transmission is stopped. From the standby mode in Fig. 5, the reel chassis (2)
Driven to the head cylinder (11) side,
Tape loading mechanism (5)
The pair of tape tip conductors (51) (54) equipped on the
Pull out the magnetic tape (151) from the
-Wrap it around (11). Then, as shown in FIG. 6, the reel chassis (2) is attached to the head chassis.
After reaching the moving end on the side of the linder (11),
Pinch roller crimping mechanism driven by motor (31)
Operate (8) and move it by pinch roller (81) as shown in Fig. 7.
Then, the magnetic tape (151) is crimped to the capstan (12). (Problems to be solved) During the development of the above VTR, the following problems became clear.
It was That is, reverse the loading motor (31) from the state shown in FIG.
Let the reel chassis (2) move to the head cylinder (11).
When moving in the direction away from the second moving end of FIG.
In the process of moving from the first to the first moving end in FIG.
The rotation of the swinging motor (31) depends on the operation of the intermittent rotation mechanism.
Therefore, it is immediately transmitted to the tape loading mechanism (5).
Without moving, the reel chassis (2) will start moving for a certain period of time
With a delay, that is, the intermittent rotation mechanism is in a state where rotation transmission is stopped
From the time when the rotation transfer state is reached via
Grouping operation is started. Therefore, in the process of moving only the reel chassis (2)
, The tape conductors (51) (54) remain stopped,
As the cassette on the reel chassis (2) moves,
The magnetic tape is pulled out from the cassette and the lead conductor (51)
By moving (54) in the unloading direction,
This will cause tape slack. Conventionally, the cap is set immediately after the reel chassis (2) starts moving.
Rotate the stun (12) and take-up reel stand (22) to
I was winding the tape, but this method was used by the applicant.
When adopted in the VTR according to the invention, the front conductor (51) (5
By the time 4) starts moving, that is, tape slack still occurs.
Tape winding will start at a stage where
Magnetic tape on the cassette after unloading is completed.
Will result in a positional shift of. The object of the present invention is to provide a tape during tape unloading.
Winding of magnetic tape is performed without causing slack,
However, after the unloading was completed, the tape was misaligned.
It is to provide a recording / reproducing device which does not exist. (Means for Solving the Problems) The tape winding and collecting device according to the present invention is a capstan model.
The reel chassis (2) is the first in the circuit that controls the data (13).
2 After starting the movement from the stop position to the first stop position,
The loading mechanism (5) opens the unloading operation.
The means for detecting the start time is connected, and the detection by the detection means is performed.
The capstan (12) and one reel stand according to
Rotate in the winding direction and pull it out on the tape running path.
The tape that had been removed is collected in the cassette. (Operation) The reel chassis (2) moves from the second moving end to the first moving end.
In the process of moving, after starting the movement of the reel chassis (2),
The period until the operation of the loading mechanism (5) starts
The capstan (12) remains stopped, so this
No tape is wound during the period. Then, unload the tape loading mechanism (5).
After the loading operation is started,
The resulting tape slack is taken up on one reel. (Effect of the Invention) According to the tape winding and collecting device of the present invention,
Magnetically without slack when loading
It is possible to wind the tape and it is unloaded
The tape will not be misaligned in the cassette after
Yes. (Example) Hereinafter, the present invention was carried out on an 8 mm VTR based on the drawings.
An example will be described in detail. It should be noted that the examples are for explaining the present invention, and
Limit the invention described in the scope of claims or reduce the scope
It should not be understood as Overall Structure VTR is shown in FIGS. 1 to 4, FIG. 8 and FIG.
, The main chassis with head cylinder (11)
(1) Supply reel stand (21) and take-up reel stand (22)
Reel chassis (2) with a head cylinder (1
Deployable to and away from 1), reel chassis
(2) The cassette is lifted up via the holder lifting mechanism (120).
The holder (20) is supported so that it can be raised and lowered. 1, 2 and 9 show a reel chassis (2).
Move it away from the head cylinder (11) and
The cassette is made to protrude from the chassis (1) to the maximum.
The holder (20) is lifted from the reel chassis (2)
The tape cassette is in this state (eject mode).
From the cassette slot (10) to the cassette holder
It is thrown into (20). FIG. 3 shows the cassette holder from the eject mode.
Push down (20) and lock onto reel chassis (2)
In this state (standby mode)
Depth length L ₁ Is 103 mm. 4 and 8 show reels from the standby mode.
Move the chassis (2) back to the head cylinder (11) side
Therefore, along with this, as described later, a tape loading mechanism,
This is a state in which the pinch roller crimping mechanism and the like are operated. Star
Retreat distance D of reel chassis (2) from standby mode
Is 16 mm, and the depth of the device after the reel chassis retracts
Length L _Two Is 87 mm, width W is 109 mm, and height H is 32 mm.
Become. Chassis drive mechanism (3) The main chassis (1) has a rectangular shape as shown in Figs.
The reel chassis (2) is formed into a shape as shown in FIGS.
As shown in Fig. 19, greatly scoop the center part of the front end and
Notch (23) to avoid contact with the
There is. Main chassis (1) as shown in FIG. 10 and FIG.
A pair of guide shafts (14) (15) are parallel to each other on both sides of the
On both sides of the reel chassis (2).
Is the pair of sliding members (2
4) (25) is arranged and these guide shafts (14) (15)
The sliding members (24) and (25) are connected to each other as shown in FIGS. 1 to 4.
Slidably fitted, which allows the main chassis (1)
While guiding the movement of the upper reel chassis (2),
The moving end is regulated. As shown in FIG. 12, FIG. 15 and FIG.
A loading motor (31) is provided on the chassis (1),
Install the worm gear (32) on the output shaft of the motor (31)
Has been. Also, on the main chassis (1), reel
A power shaft (34) extending in the direction of movement of the chassis is
The ends are rotatable and axially displaced by bearings (37) (38).
It is movably supported. On the power shaft (34), the bearing (3
In the vicinity of 7), there is a mesh that meshes with the driving worm gear (32).
For example, the gear (33) is fixed, and the wheel (33) is fixed near the other bearing (38).
Dome (35) is fixed. Also, the helical teeth of the power shaft (34)
The collar (39) is fixed in the middle of the car (33) and the worm (35).
The collar (39) on the helical gear (33) side,
The drive piece (141) that constitutes the darlock release mechanism can slide
Fit in. Furthermore, the worm (35) side of the power shaft (34)
A pair of flanges (34a) and (34b) are provided at the tip
It is fixed, and the mode lever (4) described below is
It is locked. On the other hand, the reel chassis (2) is shown in FIGS.
Move the reel chassis facing the notch (23) as shown.
A rack (36) extending along the direction is fixed and
The hook (36) always meshes with the worm (35). Therefore, as shown in FIG. 20, the loading motor (31)
Drives the helical gear (33) and the power shaft (34)
When rotated in the direction of, the worm (35) causes the rack (36) to
Is driven and the reel chassis (2) is the main chassis
Move backward in the direction approaching (1), and load
The reel chassis (2) is the main
It moves backwards away from the chassis (1). On the main chassis (1), on the left side of the reel chassis (2)
The first detection switch (130) is arranged facing the front end (2a)
Then, as shown in FIG. 21, the reel chassis (2) is retracted.
When the moving end of the first detection switch is reached, the front end (2a) is
Turn on the switch (130), and the reel chassis (2)
Loading completion is detected. In addition, when the reel chassis (2) is driven, the power shaft (34) does not slide.
The last load acts, but as described later, the mode lever
The roller (44) protruding from (4) is on the reel chassis (2).
Engage with the straight part (45a) of the guide groove (45) to
The rotation of (4), and hence the axial movement of the power shaft (34), is prevented.
(See Figure 21). Tape loading mechanism (5) At the center of the back of the main chassis (1) as shown in Fig. 10.
Is a head cylinder (11) with a rotating magnetic head,
Capstan (12) and capstan motor that drives it
Tape (13) and magnetic tape around the head cylinder (11)
Shirin with tape loading mechanism (5) for
Dur unit (16) is deployed. The tape loading mechanism (5) is
Cylinder stand (16a) to fix the dead cylinder (11)
Surround the two ring gears (6) and (61) in two steps vertically
And the ring gears (6) (61) have a plurality of support rollers (6).
It is supported by 4) so that it can rotate freely. The head cylinder is located above the two ring gears (6) (61).
An arc-shaped guide rail (57) (5
Fix 8). Guide grooves (59) (60) open on each guide rail.
And a pair of tape guides (52) (53) respectively provided in the guide grooves.
(55) (56) projecting supply side conductor (51) and winding side leader
The body (54) is slidably fitted. The supply side front conductor (51) and the winding side front conductor (54) are shown in FIG.
The upper and lower two-stage ring gear via the connecting pieces (62) and (63) shown in
(6) Connected with (61) respectively. Therefore, the ring gear
(6) As (61) rotate in opposite directions,
The front conductors (51) (54) on the guide rails (57) (58).
Move forward and backward. The ring gears (6) (61) are shown in FIGS. 12 and 20.
It is connected to the worm (35) through the gear mechanism (7)
Has been done. The gear mechanism (7) runs from the worm (35)
First, second and third deployed towards Guguia (6) (61)
Composed of 4th and 5th gears (71) (74) (77) (78) (79)
It Each gear has two upper and lower gears, and the first gear
To the 3rd gear (71) (74) (77), the upper gear and the lower gear are the same.
4th gear (78) and 5th gear (79), while rotating around the body
Is the upper gear (78a) (79a) and the lower gear as shown in FIG. 14, respectively.
(78b) and (79b) are rotatably and concentrically supported independently of each other.
And connected to each other with torsion springs (78c) (79c)
Has been done. The lower gear (72) of the first gear (71) is a worm wheel.
Mesh with the worm (35) and the upper gear (73) is the second gear.
It meshes with the lower gear (75) of (74). The second gear (74)
The upper gear (76) of the 3rd gear (77) is
The lower gear (77b) of the third gear (77) is the lower gear of the fourth gear (78).
It meshes with (78a). The upper gear (78b) of the fourth gear (78)
The upper gear (79a) of the fifth gear (79) and the ring gear of the upper gear
The lower gear (79b) of the fifth gear (79) meshes with the front (6).
It meshes with the lower ring gear (61). As shown in FIG. 20, the upper gear (73) of the first gear (71) and the upper gear (73)
The lower gear (75) of the second gear (74) that meshes with the gear is the peripheral surface.
Teeth are formed on part of the upper gear (73)
An arc convex surface (73a) having a radius is formed, and the lower gear (75)
Part of the arc has a concave arc with the same curvature as the convex surface.
The surface (75a) is formed, and the arc convex surface (73a) and the arc concave surface (75a)
Is for loading the reel chassis (2) as shown in Fig. 21.
When they are completed, they engage with each other to form an intermittent rotation mechanism.
It Also, as shown in FIG. 24, the last tooth (73a) of the upper gear (73)
On the rising surface from the tooth bottom of the to the arc convex surface (73a),
Ordinary tooth profile indicated by a chain double-dashed line, eg involute
Pressing surface (73b) inclined to the arc convex surface (73a) side from the tooth profile is formed
Has been done. Therefore, as shown in the figure, the upper gear of the first gear (71) is
The meshing between the (73) and the lower gear (75) of the second gear (74) is completed.
The pressing surface (73b) of the lower gear (75) immediately before the second tooth
Press the last tooth (75a) of the lower gear (75) of the car (74) to
When the two gears (74) are driven to rotate by the last few angles,
A line connecting the common normal at the contact point of the surface and the center of rotation of both gears
The intersection with and is closer to the 1st gear (71) than when the normal tooth surface is meshed.
As a result, the second gear (74) with respect to the first gear (71)
The angular velocity ratio of is lower than that during normal tooth surface engagement. This
Along with this, the rotational torque of the second gear (74) is increased. In addition, the last tooth surface of the lower gear (75) of the second gear (74) also has a front
It is desirable to form a tooth profile corresponding to the pressing surface (73b).
Yes. In the standby mode shown in FIG. 20, the first gear (71) is a clock.
When rotated in the direction, it goes through the second to third gears (74) (77) (78).
The upper ring gear (6) rotates clockwise,
Note: Move the supply-side conductor (51) clockwise. on the other hand,
The lower ring gear (61) is driven backwards by driving the fifth gear (79).
Counterclockwise by rotating the front conductor (54) on the winding side
Move to the direction. As a result, the cassette is set in the standby mode shown in FIG.
Supply side conductor located inside the magnetic tape (151) of (150)
(51) and the take-up side conductor (54) along the guide rail.
Move to pull out the magnetic tape from the cassette. That
After that, at the moving end shown in FIG.
A stopper integrally formed at the end (Fig. 11 (57a) (58
a)) and position the magnetic tape (151) on the head.
Wrap a specified angle (270 degrees) around the circumference of the cylinder (11),
Tape loading is complete. When the two conductors (51) (54) hit the stopper, the first
The gear (71) and the second gear (74) are in the meshed state shown in FIG.
From this state, the loading motor (31) is turned off.
Overrun and rotate, which causes the top of the 1st gear (71)
The pressing surface (73b) of the stepped gear (73) is the lower stepped gear (7) of the second gear (74).
5) is pressed, the rotational torque of the second gear (74) is changed as described above.
Increase. This increased rotational torque causes the gear mechanism to
(7) operates further, and as a result, the torsion shown in FIG.
The spring (78c) (79c) elastically deforms and the elastic force causes the fourth tooth
The upper gear (78b) of the car (78) and the lower gear (79) of the fifth gear (79)
b) is rotationally urged, which causes the supply side and winding side
The conductors (51) and (54) are pressed against the stopper. From the above state, the first gear (71) further rotates clockwise
Also, as shown in FIG. 21, the arc of the upper gear (73) of the first gear (71)
The convex surface (73a) and the arcuate concave surface (75) of the lower gear (75) of the second gear (74)
a) engages, so the first gear (71) runs idle and the second tooth (71)
It does not transmit torque to the gears after the car (74). At this time,
By the reaction force of the torsion spring (79c), the second gear (74)
A clockwise rotating force acts on the circular arc convex surface (73
In the state where a) and the circular arc concave surface (75a) are engaged, the second gear (74)
Does not rotate. Important movement in the tape loading mechanism (5)
The work is done with the leading conductor (51) even after the tape loading is completed.
While holding (54) at the moving end on the guide rail,
The circular arc convex surface of the car (71) is engaged with the circular arc concave surface of the second gear (74).
Worms (35) by loading motor (31) in position
Can be driven to rotate. Therefore, as described below,
Convert the rotation of the dome (35) into the axial movement of the power shaft (34).
The crimping operation of the pinch roller crimping mechanism (8) described later.
You can do it. Pinch roller pressure bonding mechanism (8) As shown in FIG. 16 and FIGS.
Install a pinch roller (81) on the upper right side of the chassis (2).
The pinch roller lever (82) and drive lever (83)
Both levers are pivotally supported on the shaft and independently of each other.
A spring (85) is stretched between (82) and (83). At the free end of the pinch roller lever (82), pinch roller (81)
Is projected upward, and the free end of the drive lever (83) is
A cam follower (84) is projected in the direction and the cam
Engagement pin (83a) is projected near the follower (84).
It The cam follower (84) is a reel chassis (2).
On the main chassis (1) through the circular arc hole
Engages with a cam groove (86) provided on the. Also, the engaging pin (83
a) is connected to the end of the slider (87) described later. Further, the reel chassis (2) includes the pinch roller lever.
ー Pull out the winding side at a position eccentric from the center of rotation of (82).
The lever (98) is pivotally supported, and the lever (98) and the pinch roller
The bar (82) is pivotally connected to the bar (82) by a connecting link (80).
At the free end of the take-out lever (98),
Pin (9
7) is projected upward. The cam groove (86) on the main chassis (1) is shown in Fig. 25.
Install the main chassis along the backward direction of the reel chassis (2).
-Drive slope (86a) that tilts toward the center of the chassis and the drive slope (86a)
From the end on the capstan (12) side of the
A parallel plane (86b) that extends and further forward from the end of the parallel plane (86b)
A flank (86c) that tilts toward the center of the main chassis is formed.
Has been done. Therefore, the reel chassis (2) is the standby of FIG.
From the mode, the loading completed state (read
Cam follower (84)
It is pressed by the drive slope (86a) of the groove (86) and
-(83) rotates clockwise, and pinch roller
Turn the lever (82) and the take-up side extraction lever (98) clockwise.
Rotate. Then, as shown in FIG. 26, the reel chassis (2)
The pinch roller (81) will be capped when
It will be located just before the stun (12). This and
The cam follower (84) is the same as the flank (86c) of the cam groove (86).
Faced with each other, the cam follower (84) was released in this state.
The rotation of the drive lever (83) in the clockwise direction becomes free. Further, at the front edge of the reel chassis (2), as shown in FIG.
As shown in Figure 25, right and left along the chassis notch (23)
The extending slider (87) is against the reel chassis (2).
It is supported so as to be relatively movable in the left-right direction within a predetermined range. The
At the right end of the slider (87), engage the drive lever (83).
The dowel pin (83a) is connected to the left end of the slider (87).
Is the slider drive pin (41) of the mode lever (4) described below.
An engagement receiving portion (88) for the is recessed. Furthermore, the slider
In the center, there is a pin (89) that should drive the restriction plate (160) described below.
It is projected downward. The mode lever (4) is shown in FIG. 15, FIG. 22 and FIG.
As shown in the figure, turn the spindle (40) on the main chassis (1).
It is supported freely, and the free end on the chassis center side is slidable.
Eider drive pin (41) is projected and the other free end side
The second and third detection switches (131) (132), which will be described later,
The first projection piece (42) and the second projection piece (43) for N are formed bifurcated
Has been done. In addition, with the power shaft (34) of the mode lever (4)
The engaging portion has an axial direction between the pair of flanges (34a) (34b).
The driven part (46) sandwiched with
It Furthermore, on the upper surface of the mode lever (4), the second protrusion (43)
A roller (44) is provided so as to project in the vicinity thereof, and the roller (44) is
Guide groove formed on the rear surface of reel chassis (2) as shown in Fig. 9
Engage with (45). The guide groove (45) has a mode lever for moving the reel chassis.
A straight part (45a) is formed to keep the posture of (4) constant.
At the same time, the reel chassis (2) is
Mode lever when retracted to the
(4) First slope (45b) allowing counterclockwise rotation
And the mode lever at the eject mode position shown in FIG.
The second slope (45c) that allows clockwise rotation of (4)
Has been formed. Loading of the reel chassis (2) shown in FIG. 21 is completed.
From the completed state, power is supplied by driving the loading motor (31).
When the shaft (34) rotates further in the direction of the arrow, the reel chassis
Warm (35) is locked because (2) can no longer retreat
By engaging the rack (36) in
The thrust force in the protruding direction (downward in Fig. 22) is received,
The power shaft (34) to move in the reel chassis protruding direction.
Becomes As a result, as shown in FIG. 22, the mode lever
(4) is driven counterclockwise. Standby mode to reel chassis shown in FIG. 25
(2) retracts and the driving lever (83) moves clockwise as described above.
When rotated to the left, the slider (87) moves leftward accordingly.
Slide to the reel chassis loader as shown in Fig. 26.
When the swing is complete, the slider (87) engagement receiver
(88) engages the slider drive pin (41) of the mode lever (4).
Will meet. From this state, by moving the power shaft (34) in the axial direction,
The mode lever (4) rotates counterclockwise,
The idler (87) is towed by the slider drive pin (41).
And slide it from the position shown in Fig. 26 to the position shown in Fig. 27.
It At this time, as shown in FIG. 22, the roller of the mode lever (4) is
(44) faces the first slope (45b) of the guide groove (44),
Counterclockwise rotation of the lever (4) is allowed. Along with this, the drive lever (83) and the pinch roller lever
(82) is driven clockwise from the state shown in FIG.
After that, the pinch roller (81) is connected via the magnetic tape (151).
Abut the pushstan (12), and the slider (87) moves slightly
By moving the drive lever (83) and the pinch roller
The spring (85) interposed between the bar (82) stretches
The pinch roller by the urging force of the spring (85).
(81) is pressed onto the capstan (12) via the magnetic tape (151).
It is worn. At this time, the drive lever (83)
The constraint from (86) is released and the clockwise rotation becomes free.
There is. When the pinch roller crimping operation is completed, as shown in FIG.
The first protrusion (42) of the drive mode lever (4) is connected to the second detection switch.
Switch 131 to turn on the load motor (3).
1) stops. The loading motor (31) reverses from the state shown in FIG.
And, due to the thrust acting on the worm (35) upward in the drawing,
The power shaft (34) moves in the same direction, and the mode
-(4) is driven clockwise. At this time, the roller (44) provided on the mode lever (4) is released.
On the first slope (45b) of the guide groove (45) on the chassis (2).
The reel chassis (2) in the unloading direction.
Since it is blocking movement, by the rotation of the worm (35)
The reel chassis (2) is never driven. Therefore, first, the power shaft (34) moves in the axial direction and the mode
The bar (4) is driven to the state shown in FIG.
The roller (44) of the lever (4) is connected to the first slope (4) of the guide groove (45).
5b) is detached and the reel chassis (2) is allowed to move.
After that, the power of the worm (35) is transmitted to the rack (36),
Unloading of the reel chassis (2) is started
Of. Back tension lever mechanism (9) As shown in FIG. 16, the upper left side of the reel chassis (2)
A back tension lever mechanism (9) is provided in the.
The mechanism faces the supply reel base (21) and
Back with protruding pins (91) for hooking magnetic tape
Pivot the tension lever (92) on the reel chassis (2).
is doing. Approximately the center of rotation of the lever (92),
The follower (93) is projected downward, and the cam follower (9
3) penetrates the circular hole (27) opened in the reel chassis (2)
Is engaged with the cam groove (95) on the main chassis (1).
It Back tension lever (92) and reel chassis (2)
A spring (99) is stretched between the
The lever (92) is biased in the opening direction. At the base end of the cam follower (93), the supply reel
One end of the brake band (94) wound around the peripheral surface of the stand (21) is connected.
Tied up. In the cam groove (95), as shown in FIG. 28, the reel chassis
From the center of the main chassis along the backward direction of (2)
The guide slope (95a) that tilts away and the rear of the guide slope
A parallel surface (95b) extending from the end in parallel with the receding direction,
Extend from the end of the parallel surface (95b) to the outside of the chassis at a substantially right angle.
The flank face (95c) is formed. Therefore, from the standby mode shown in FIG.
When the chassis (2) moves backward, the cam follower (9
3) moves along the guide slope (95a) of the cam groove (95),
Along with this, as shown in FIG. 30, the back tension lever (92)
Rotates in the biasing direction of the spring (99), that is, counterclockwise
The pull-out pin (91) to remove the magnetic tape (151) from the cassette.
Pull it out. Also, as the back tension lever (92) rotates,
Key band (94) slides on the peripheral surface of the supply reel stand (21),
In this state, the pin (91) serves as the tension detector,
The tension of the band (94) is adjusted so that the magnetic tape
A proper tension is given to (151). this
At this time, as shown in FIG. 30, the cam follower (93) is in the cam groove (95).
Back tension lever (92) facing the flank (95c)
Is free to rotate in the counterclockwise direction
Has become. Therefore, during the tension adjustment process, the cam
The follower (93) includes a flank (95c) and a flat surface facing the flank.
It will make a reciprocating movement to and from the row surface (95b). Reel base drive mechanism (100) In the VTR of this embodiment, the capstan motor (13)
Power to the take-up reel stand (22) or supply reel stand (21).
By adopting the method of driving these reel stands,
There is. The main chassis (1) is shown in Figures 10 and 18.
As you go from the capstan (12) side to the chassis front edge
The first, second, third and fourth gears (102) (103) (104) (10
The gear train (101) consisting of 5) is arranged, and the first gear (102) is a key.
It is fixed to the output shaft of the capstan motor (13). In addition, the main chassis (1) is known at the end of the gear train.
The swing idler (110) is deployed. The swinging eye
The drager (110) is normally attached to the fourth gear (105) as shown in FIG.
Attach the support arm (113) to the rotating shaft of the driving gear (111)
The driving gear (111) is supported at the free end of the supporting arm.
With the idler gear (112) that always meshes with
The friction member between the driving gear (111) and the support arm (113).
(Not shown) is interposed. On the support arm (113),
A protrusion (114) is formed toward the center of the chassis. Furthermore, in the center of the main chassis (1), the swing
Do not integrally mold synthetic resin on the side of the idler (110).
The regulation plate (160) can be slid within the specified range in the left-right direction.
Supported by. The regulation plate (160) has a swinging eye
Forming a convex portion (161) facing the protrusion (114) of the mirror (110)
At the same time, the pin (89) protruding from the slider (87) is engaged.
It forms a cam wall (163) to be made. On the cam wall (163)
The swing idler along the reel chassis retracting direction.
A slope is formed that is inclined toward the (110) side. In addition, the regulation plate (16
(0), the regulation plate body is biased toward the swing idler (110) side.
Elastic portion (162) is integrally formed, and the tip of the elastic portion is
It is locked to the main chassis (1). On the other hand, as shown in FIG. 19 and FIG.
The chassis notch (23) side is located on the rear of the upper right side of the chassis (2).
From the end of the 5th gear (1) toward the take-up reel stand (22).
06), 6th gear (107) and reel drive gear (116)
The gear train is arranged. The reel drive gear (116)
Winding through the chassis (2) and advancing to the top of the chassis
It meshes with the gear part (22a) of the reel stand (22). In addition, the reel chassis (2) is provided with
From the drive gear (116) side to the supply reel stand (21).
1 relay gear (117), 2nd relay gear (118) and reel drive gear
A gear train consisting of (119) is provided. Reel drive gear (11
9) goes through the reel chassis (2) and
And is engaged with the gear (21a) of the supply reel stand (21).
It In the standby mode of FIG. 28, the capstan (1
When 2) rotates counterclockwise, that is, in the tape winding direction,
As a result, the swing idler (110) moves counterclockwise.
After swinging, the idler gear (112) is released as shown.
It meshes with the fifth gear (106) on the chassis (2). Therefore, the rotation of the capstan motor (13) will
Ra (110), 5th gear (106), 6th gear (107), reel drive
It is transmitted to the take-up reel stand (22) through the dynamic gear (116),
The reel stand rotates clockwise and the tape is not wound.
To be seen. From the state of FIG. 28, the reel chassis (2) is
If you make a backward movement towards the
Then, as shown in Fig. 29, the idler of the swing idler (110) is
-The gear (112) becomes the fifth gear (106) and the reel drive gear (116).
It meshes at the same time, and the reel chassis (2) is loaded
When retracted to the completion position, idler as shown in Fig. 30.
The gear (112) disengages from the fifth gear (106), and the reel drive gear
Only meshes with (116). Also, as shown in FIGS. 25 to 26, the reel chassis
As (2) moves backward, it hits the slider (87).
The set pin (89) comes into contact with the cam wall (163) of the regulation plate (160),
Move the control plate (160) slightly to the left against the elastic part (162)
Excuse me. In the state shown in FIG. 26, the convex portion (16
1) slightly moved into the swing area of the swing idler (110)
Then, the convex portion abuts on the protrusion (144) of the swing idler (110).
By rotating the idler (110) clockwise.
Restrict the turning end. As a result, idler gear (112)
Are kept out of mesh with the first relay gear (117). Further, in the state shown in FIG. 26, as will be described later, the capstan (12)
Is rotating clockwise, that is, in the tape rewinding direction.
Along with this, the swing idler (110) is swung clockwise.
Is applied to the idler gear (112).
It does not mesh with the wheel drive gear (116). As a result, the idler gear (112) is located on the side of the supply reel stand.
Reel drive gear on the take-up reel stand side with 1 relay gear (117)
Because it is maintained in a neutral state where it does not mesh with a.
It In this neutral state, both reel stands are free to rotate,
Both sides of the cassette when loading the reel chassis (2)
What is set to pull the magnetic tape from the reel
It is this V that pulls out the magnetic tape from both reels.
In TR, wrapped around magnetic tape for head cylinder
Due to the large angle, the friction between the head cylinder and the magnetic tape
There is a lot of rubbing, and you can pull out the magnetic tape from both reels.
It will prevent the magnetic tape from being damaged by the friction.
Because. Then, the reel chassis (2) is moved from the position shown in FIG.
In the process of retreating to the play mode position in Fig. 27, the slide
The pin (89) moves to the left of the regulating plate (1
Press the cam wall (163) of 60) and move the regulation plate (160) to the left.
Move it. As a result, the convex part (161) of the regulation plate (160) is
Separate from the swing idler (110), swing idler
(110) is allowed to swing to the left and right.
It The capstan (12) rotates counterclockwise in the state shown in FIG.
The take-up reel stand (22) is driven clockwise,
The tape is wound during normal playback or fast forward.
It When the capstan (12) rotates clockwise, it will
The idler (110) swings clockwise,
As shown in FIG. 31, the idler gear (112) is a reel drive gear.
The first which is separated from (116) and is connected to the supply reel stand (21)
It meshes with the relay gear (117). And idler gear (11
The clockwise rotation of 2) is the first relay gear (117), the second relay
Via the gear (118) and reel drive gear (119) the supply reel
To the gear (21a) of the base (21), and supply
The base (21) is driven counterclockwise, and during rewind playback or
The tape is taken up when the tape is rewound.
It Holder Lifting Mechanism (120) As shown in FIG. 17 and FIGS. 32 to 34,
On both sides of the chassis (2), the holder lifting mechanism (12
The cassette holder (20) is supported via (0). The holder lifting mechanism (120) is installed on both sides of the cassette holder (20).
Consists of a pair of left and right link mechanisms installed on the side
Each link mechanism includes a first arm (123) and a second arm (12).
4) and are crossed with each other, and at the crossing point both
The arms are connected for relative rotation. First arm (12
The base end on the cassette input port (10) side of 3) is the cassette holder.
-Fit freely into the support hole (20a) provided in the side plate of (20),
The tip is horizontally long on the side plate of the reel chassis (2).
It is slidably fitted in the opened guide hole (127). In addition, the second
The base end of the chamber (124) on the cassette slot (10) side is
Rotating freely in the support hole (126) provided in the side plate of the holder (20)
The front end of the reel chassis (2) on the side plate
It is slidably fitted into the guide hole (20b) that is opened long. There is a spring between the first arm (123) and the second arm (124).
Install the gu (125). This makes the cassette holder (20) the reel chassis.
(2) It is supported so that it can move up and down,
Will be encouraged. Holder lock mechanism (140) As shown in FIGS. 32 to 34, holder lifting mechanism (120)
On the left side of the link mechanism, lower the cassette holder (20).
Holder lock mechanism (140) for holding in position is linked
To be done. The holder lock mechanism (140) is on the sliding side of the second arm (124).
Extend the end of the toward the main chassis (1),
At the extension end, project the lock pin (128) toward the inside of the holder.
I have set up. On the other hand, insert the cassette into the side plate of the cassette holder (20).
Rotate the lock arm (146) to the end opposite the mouth (110)
Freely pivoted and stretched between reel chassis (2)
It is biased counterclockwise by the spring (170). Lock
The free end of the arm (146) engages with the lock pin (128).
A possible locking piece (147) is projected, and at the same time, the locking piece (147)
A pressing pin (148) is provided so as to project outward in the vicinity thereof. In addition,
The dock arm (146) is installed on the cassette holder (20).
The upper end (129) regulates the counterclockwise rotation end.
There is. Also, at the rear end of the side plate of the reel chassis (2), the lock
Face the push pin (148) of the arm (146) and lower to the rear.
It forms an inclined cam part (29). Therefore, from the eject mode shown in FIG.
When the lower (20) is pushed down, the pressing pin (148) causes the cam portion (2
When hitting 9), the lock arm (146) moves slightly clockwise.
Rotate. At the same time, the second arm (124) is in a horizontal position.
Rotate toward. Furthermore, lower the cassette holder (20)
When it is pushed all the way down, the push pin (148) is closed as shown in Fig. 32.
When the spring (170) urges it away from the
Rotate in the measuring direction. As a result, the engagement of the lock arm (146)
The stop piece (147) engages with the lock pin (128) of the second arm (124)
And lock the cassette holder (20) at the lower end.
is there. In addition, the inner surface of the cam portion (29) is below the pressing pin (148).
A fourth detection switch (133) is arranged at the position. The sui
The cassette holder (20) is locked as shown in Fig. 32.
Closed by pressing pin (148),
Detect the Darlock state. Based on the detection
The loading of the chassis is started. Holder lock release mechanism To unlock the holder lock mechanism (140),
By moving the slide plate (144) placed on the chassis (1)
Turn the lock arm (146) counterclockwise to
To release the engagement between the stopper (147) and the lock pin (128)
Therefore, it is carried out. The slide plate (144) moves as shown in FIGS. 21 and 23.
On the side of the force shaft (34), in the direction of movement of the reel chassis (2).
It is slidably installed within a specified range along the main shear
Reel chassis by torsion spring (145) on shi (1)
It is biased to the (2) side. The slide plate (144)
The lock arm (14
The first protrusion (171) to be engaged with 6) is formed and
At the end opposite to the first projecting piece, a driven lever (143) described later is attached.
A second protrusion (172) is formed with which one free end engages.
It The slide plate (144) is axially supported on the main chassis (1).
The driven lever (143) and the driving lever (142)
It is connected to a drive piece (141) fitted to the power shaft (34). Prime mover
A pair of back-to-back engagements on the free ends of the lever (142)
One of the parts is brought into contact with the driving piece (141), and the other engaging part is
The driven lever (143) is brought into contact with one free end. or,
The other free end of the driven lever (143) is above the slide plate (144).
To the slide plate (144) and the second protrusion (17).
It applies to 2). An reel of reel chassis (2) as shown in FIG. 20.
Of the loading motor (31) with the loading completed.
When the power shaft (34) is further rotated in the direction of the arrow by driving,
The reel chassis (2) can no longer move forward, so
The frame (35) engages with the locked rack (36).
Thrust in the reel chassis retracting direction (upward in FIG. 20)
In response to this, the power shaft (34) retracts the reel chassis.
Will move in the direction. As a result, as shown in FIG.
The mode lever (4) is driven clockwise. On this occasion,
The roller (44) of the mode lever (4) is located at the second slant of the guide groove (45).
Face the surface (45c) and turn the mode lever (4) clockwise.
Rotation is allowed. As the power shaft (34) moves in the axial direction as described above,
As shown in FIG. 23, the driving piece (141) moves the driving lever (142) counterclockwise.
Drive the driven lever (142) to drive the driven lever (143).
Driven counterclockwise, the driven lever (143)
The slide plate (144) is moved against (145). In this way, the slide plate (144) retracts the reel chassis
When it is moved in the opposite direction, as shown in FIG. 33, the first protrusion (171)
Press the free end (149) of the lock arm (146) to
Rotate the clock clockwise. As a result, the locking piece (14
7) is disengaged from the lock pin (128) and the cassette holder (2
0) is unlocked. As a result, as shown in FIG.
The set holder (20) is biased by the spring (125).
To rise. At the same time, the lock arm (146)
Return to the counterclockwise turning end. Then, as will be described later, the slide plate (144) has two points in FIG.
Return to the reel chassis (2) side as shown by the chain line,
This enables the next holder lock operation. From the state shown in FIG. 23, to drive the loading motor (31)
Therefore, if you rotate the power shaft (34) in the
The thrust acting downward on the drawing (35) acts on the power shaft (34).
Move in the same direction, and the mode lever (4)
While returning to the position of FIG. 20, the slide plate (144)
It returns to the position shown in FIG. In the state shown in FIG. 23, the roller (44) of the mode lever (4) is
Abut the second slope (45c) of the guide groove (45) on the reel chassis.
And because it prevents the reel chassis from moving backward,
Drive the worm (35) to move the reel chassis
There is no such thing. Therefore, first, the power shaft (34) moves in the axial direction, and the mode
The bar (4) is driven to the state shown in FIG.
And the roller (44) of the mode lever (4) is guided by the guide groove (45).
The second slope (45c) of the reel chassis (2)
After the movement is allowed, the torque of the worm (35) is
6) and the loading of reel chassis (2)
It will be started. Holder positioning mechanism Set the cassette holder (20) to the main shear in the state shown in Fig. 32.
In order to hold it at a predetermined height above the sea (1),
The holder positioning mechanism is adopted. As shown in FIG. 9, FIG. 10 and FIG.
On the rear end of the right side plate of the rudder (20), engage the engaging pin (121).
It is projected in the direction. On the other hand, on the main chassis (1), at the rear end of the right side,
U-shaped engagement receiving piece (122) opening to the front of the main chassis
Is projected. The position of the engagement receiving piece (122) is as shown in FIG.
When loading of the reel chassis (2) is completed
, So that the engagement pin (121) is closely fitted.
There is. Therefore, the left side plate of the cassette holder (20) is shown in FIG.
In this state, the lock arm (146) and the lock pin (128) are engaged.
The main chassis (1) at a specified height.
It is held in this locked state when loading is completed as shown in Fig. 4.
Also maintained in play mode. Also cassette
As shown in FIG. 4, the right side plate of the holder (20) is an engaging pin (121).
And the engagement receiving piece (122), the main chassis
(1) It is held at a predetermined height position above. As a result, in play mode, inside the cassette holder (20)
The tape cassette on the main chassis (1)
It is held horizontally at the position. The engagement pin (121) is electrically connected to the cassette holder (20).
When connected, the engagement receiving piece (122) is the main chassis
It is electrically connected to (1). This makes the cassette ho
The rudder (20) is grounded to the main chassis (1) and the cassette
The inside of the holder (20) is magnetically shielded. Therefore,
If it is surrounded by the cassette holder (20) in
Head cylinder (11) magnetic head and rotary
-The transformer is protected from external magnetic noise.
It Other configurations As shown in FIG. 8, on the front edge side of the central portion of the reel chassis (2)
Is a reel lock mechanism (not shown) provided in the cassette.
The reel lock release piece (26) for unlocking
It is projected. Further, the reel chassis (2) has a luminescent element on the rear edge side of the central portion.
The child (134) is deployed and the chassis side plates are
The tape end sensor (13
4) and the tape top sensor (137) are installed,
Therefore, in the cassette holder (20) in the play mode
The cassette completely winds the magnetic tape onto the take-up reel.
Tape end condition or complete supply
The tape top that has been rewound to the
It As shown in FIG. 9, the right side of the holder lifting mechanism (120) is constructed.
An arcuate gear piece (173) is provided on the second arm (124) in a protruding manner.
In addition, on the reel chassis (2), the gear piece (173)
To prevent the cassette holder (20) from
A damper (174) for adding resistance is provided. In addition, the reel chassis (2) has a supply reel as shown in FIG.
Facing the back of the reel stand (21) and the take-up reel stand (22),
Supply reel rotation sensor (138) and take-up reel rotation
Sensor (139) is installed to detect the rotation of each reel.
It The rotation sensors (138) (139) are, for example, photoreflectors.
It is composed by Circuit configuration Figure 35 shows the capstan motor (13) and loading.
It shows the configuration of the control circuit that controls the operation of the motor (31).
It System controller that controls operation in various modes of VTR
The controller (180) consists of a microcomputer.
The input port has the first to fourth detection switches described above.
(130) (131) (132) (133) (134), cassette discriminating switch (13
5), tape end sensor (136), tape top sensor
-(137), supply reel rotation sensor (138) and winding reel
The rotation sensor (139) is connected and the output port
Capstan motor (13) and loading motor (31)
The drivers (13a) and (31a) that generate the driving voltage
Has been continued. The system controller (180) has a VTR operation panel
Command signals from various operation keys (not shown) deployed in the
Based on the
The computer program is set and
As will be described later with reference to FIG. 40, it is unique to the VTR of the present invention.
A computer program is set up to perform the operation
There is. Main mode transition operation In this VTR, the cassette holder moves up
Eject mode that allows loading of cassettes
In the cut mode, push down the cassette holder to
Standby mode locked on the chassis, the standby
Loading reel chassis, tape loading from mode
Signal, pinch roller crimping operation, etc.
Play mode that allows recording and playback
The strike that stopped the rotation of the cylinder and capstan.
Pin from Play Mode, Play Mode or Stop Mode
A total of 5 models in ready mode in which the chillers are released
Mode is set. From standby mode to ready mode (loading
Completed) Move the cassette holder (20) to the reel chassis as shown in Fig. 3.
(2) Operation in the standby mode locked above
When the loading command is issued from the panel, the load
The ring motor (31) is activated and the reel chassis (2)
From the standby mode position in Fig. 5 to loading in Fig. 6
It moves back to the complete position and the first detection switch as shown in Fig. 21.
(130) is turned on. In this process, the back tension lever (9
2), take-up side draw-out lever (98) and pinch roller lever
(82) opens in the tape pull-out direction, and the supply side and winding
The leading conductors (51) (54) on the rear side move and the magnetic tape
(151) is stretched on a predetermined route. Also, the mode lever
(4) and the slider (87) are engaged with each other. Transition from ready mode to play mode
The loading motor (31) continues to rotate after the
When done, as shown in FIGS. 21 to 22, the power shaft (34)
Moves axially, and the mode lever (4) slides.
Pull the idder (87) and pull the pinch roller (81) as shown in Fig. 7.
Press it onto the capstan (12) via the magnetic tape (151).
Meru. As a result, as shown in FIG. 22, the second detection switch (131)
Turns on and the ON signal is sent to the system controller
Then, the loading motor is stopped. In the play mode shown in FIG. 7, the head cylinder (11) and
The capstan motor (13) rotates to record or re-record the signal.
Life is done. Also, rotate the capstan (12) at high speed in play mode.
Finally, the tape is fast forwarded or rewound. Transition operation panel from play mode to stop mode
If a command to switch from stop mode to stop mode is issued,
Rotation of the dead cylinder (11) and capstan (12) is stopped
To do. The reel chassis (2) maintains the position shown in FIG. From play mode or stop mode to ready mode
Transition to capstan and head series when rewinding the tape as described below.
If there is tape slack between the
Ready mode where the pinch roller shown in the figure is released
Is set. In this case, drive the loading motor (31) to drive
Axial (34) is axial from position 22 to position 21
Driven to. As a result, from FIG. 27 to FIG.
The slider (87) moves to the right as shown,
Of the roller (81) to the capstan (12) is released. The
When the crimp is released, the first detection switch shown in FIG.
(130) is detected by opening, the detection signal
Therefore, the loading motor (31) is stopped. Transition from ready mode to standby mode The power shaft (34) rotates counterclockwise from the state shown in FIG. 21.
As a result, the reel chassis (2) is
Driven to the immode position. Also, from the state shown in FIG. 21, by driving the worm (35),
By rotating the first gear (71) counterclockwise,
The arcuate convex surface of the upper gear (73) of the gear (71) is (73a) the second gear (7
4) Disengage from the circular concave surface (75a) of the lower gear (75), and
(73) and the lower gear (75) start meshing between the tooth surfaces.
It Therefore, the rotation of the worm (35) is caused by the gear mechanism (7).
After that, it is transmitted to both ring gears (6) and (61), and from FIG.
As shown in Fig. 5, the supply side and winding side front conductors (51) (54) are
To return to the tape loading start position in the set (150)
Is. At the same time, the pull-out levers (92) (9
8) and the pinch roller lever (82)
Return to the starting position. In addition, in parallel with the return operation of the front conductors (51) (54), as described later
The take-up reel stand (22) is driven in the tape take-up direction,
The magnetic tape (1
51) is rewound into the cassette. In addition, stop the reel chassis (2) in standby mode.
Instead, it shifts to the next eject mode. Transition from standby mode to eject mode The power shaft (34) is in the direction of the arrow opposite from the standby mode in Fig. 20.
By rotating in the opposite direction, the power shaft (34) is
It is driven in the axial direction, and the slide plate (144) moves with it.
Movement against the torsion spring (145), which causes the third
The holder lock release operation shown in Figs. 2 to 34 cannot be performed.
The cassette holder (20) rises. The eject mode of FIG. 23 is the third detection switch (13
2) is detected as 100msec after closing,
The loading motor (31) is stopped based on the detection. Peculiar operation Tape slack treatment method During the tape rewinding operation, the head cylinder and tape
Magnetic tape stopped on the cylinder surface due to friction
In this case, this allows for a taper between the cylinder and the capstan.
Loosening occurs. To wind up this tape slack,
The program for performing the operation shown in Fig. 38 is set.
Has been. The tape slack processing method will be described below with reference to FIG.
Reveal. Head cylinder (11) and caps during tape rewinding operation
If tape slack occurs between the tongue (12) and the
Only the rotation of the table (21) stops, so turn this on the supply reel
It is detected by the rotation sensor (138) (Fig. 38 (181)).
Based on the detection, the rotation of the capstan (12) is temporarily stopped.
((182) in the figure), then remove the loading motor (31).
Start in the loading direction, and slide the pinch roller (81)
Release the crimp on the pushstan (12) and
(12) in the FWD direction (send the magnetic tape to the take-up reel stand side)
In the direction of output), rotate at 7 times the speed of normal playback (Fig.
(183)), the take-up reel stand (22) is
Rotate in the winding direction. Then supply reel stand (21)
At the start of rotation, or after 5 seconds,
Stop the capstan (12) and head cylinder (11).
(184)). This will cause the tape slack to wind onto the take-up reel.
Be done. After that, only eject operation or power off command
I will accept it. In addition, the timer operation for 5 seconds is supplied for some reason.
Protect the tape if the reel base (21) does not rotate
This is because Tape unloading method During unloading operation of reel chassis (2)
The reel chassis (2) or cassette holder (20)
Obstacles that prevent the reel chassis (2) from moving forward
Motion that occurs from the loading motor (31)
Force is from loading motor (31) to reel chassis
It acts as a load on the mechanism leading to (2),
It may damage the mechanism. Therefore, in this VTR, the reel chassis (2)
Drive voltage of loading motor (31)
Set lower than that in loading
By (section T in FIG. 36) _Two , T _Three , T _Four ), The above loss
Minimizes scratches. Lower unloading drive voltage than loading
The only thing that can be done is to pull out the tape when unloading.
Driving force required for unloading
Is smaller than when loading. Figures 36A (a) (b) show loading and unloading.
Drive voltage supplied to the loading motor (31) during charging
Are shown respectively. At the time of loading, as shown in Fig. 36A (a), 5V DC power is supplied.
Pressure is sent to the loading motor (31). In contrast,
During unloading, the cycle is 20 ms as shown in Fig. 36A.
Pulse width modulated drive pulse with duty of 40% by ec
Is sent to the loading motor (31), which results in the load
The swing motor (31) is driven by a smoothed voltage of about 2V.
Will be done. Tape winding method during unloading In this VTR, from the ready mode shown in FIG.
The loading motor (31) starts in the unloading direction
If it does, the rotation of the worm (35) is transmitted to the rack (36).
Drive of the reel chassis (2) is started.
The rotation of the first gear (71) of the mechanism (7) is caused by the above-mentioned arc convex surface (73a).
And the intermittent rotation mechanism consisting of the circular arc concave surface (75a)
The ring gear (6) (61) is not immediately transmitted to the reel
There is a predetermined delay from the start of moving the chassis (2).
That is, the upper gear (73) of the first gear (71) is the second gear (74)
From the time it meshes with the lower gear (75)
The unloading operation of the front conductors (51) (54) is started. Therefore, in the process of moving only the reel chassis (2)
With the movement of the cassette on the reel chassis (2)
The magnetic tape from the cassette,
The movement of the bodies (51) (54) in the unloading direction
Therefore, tape slack occurs. Therefore, in order to wind up the tape slack,
Has been taken. FIGS. 36 (a) to 36 (e) show each of the problems that occur during unloading.
The timing of the seed control signal is shown in FIG.
1 When the detection switch (130) is opened, it becomes "H" L
The OAD END signal is shown in FIG.
When 1) opens, it becomes “H” and the third detection switch
LOAD TOP signal which becomes "L" by closing H (132)
Figure (c) shows that the head cylinder (11) is activated.
The cylinder ON signal for tightening is shown.
Caps for rotating the capstan (12) in the FWD direction
Shows the turn-on signal, and Figure (e) shows the loading mode.
An unloader for activating the data (31) in the unloading direction.
A signal ON signal is shown. In addition, Fig. 39 shows the program set in the system controller.
It explains Gram. In the following, referring to FIGS. 36 and 39, unloaded
The tape winding method at the time of the operation will be described. When unloading from stop mode,
First, activate the head cylinder (11), and
Release operation of the roller (81) (section T in FIG. 36) ₁ , 39th
(185) to (186)), and shift to the ready mode.
Then, as shown in Fig. 36 (d), after 100msec, the caps
Tongue (12) in 30msec RVS direction (wind the tape around the supply reel)
Rotate at 1x speed (normal speed) in the returning direction ((18)
7)) and, as a result, as shown in FIG.
Set (112) to the neutral position. Also, from the ready mode,
Head cylinder (11) for unloading
Rotate the capstan (12) (187) immediately after starting
Let Place the idler gear (112) in the neutral position.
The reason is that the lead conductors (51) and (54) remain stopped as described above.
When the reel chassis (2) moves, the reel
This is so that the pullout can be pulled out. Next, set the loading motor (31) in the unloading direction.
Boot to the reel chassis (2) in standby mode
Move to the place. Then, as shown in Fig. 36 (a), L
After the OAD END signal becomes "H", turn the capstan (12)
Rotate in the FWD direction. In this way, the reel chassis
(2) Only the period of movement (section T in FIG. 36) _Two )
Stop the capstan (12) and let the tape
To prevent the tape from slipping due to
It After the LOAD END signal becomes "H", the period of 300msec (
36 section T _Three ) Turns the capstan (12) at 5x speed
(Fig. 39 (188)), then eject mode
Period (section T in FIG. 36) _Four And T ₅ ) Is the cap
Rotate the stun (12) at 9x speed (Fig. (189)) and
The magnetic tape pulled out from the
It is rolled up. In this way, the tip of the supply side and the winding side
For a short time after the conductors (51) (54) start to move,
To set the rotation speed of the stun (12) slow, the following two
It depends on the reason. That is, the moving speed of the leading conductor immediately after the start of moving
Is the pushing force of the first gear (71) and the second gear (74) shown in FIG.
Due to the engagement on the pressure surface (73b), both gears (71) (74)
Since it will be lower than when meshed on the tooth surface, the movement of the lead conductor
The amount of tape slack associated with
It Therefore, a short period immediately after the lead conductor starts moving.
Slows the tape winding speed and unloads
This prevents the positional deviation of the tape due to the above. Also, the third
As shown in Fig. 6, when the LOAD END signal becomes "H" and when
There is some deviation from the time when the conductor starts moving.
It is unavoidable to occur, and when the start of the movement of the lead conductor is delayed
When the tape is wound at high speed from the beginning, the tape position
This is because there will be a gap. Section T in FIG. 36 _Four The reel chassis (2)
When loading is completed, LOAD TOP
The signal becomes "L". After the LOAD TOP signal becomes "L", the loading motor
Normal drive voltage (5V) for a period of 100msec for (31)
Rotate in the unloading direction with (See Fig. 39 (19
0)), which unlocks the cassette holder (20)
Do. Finally, load motor (31), capstan (12), and
Stop the head cylinder (11) (Fig. 39 (19
1)), end the procedure. As a result, pulling out the tape at the start of unloading
It is carried out smoothly, and there is still a large deviation in tape position and
The unloading operation can be performed without causing slack.
Be played. Tape processing method when the cylinder is stopped As described above, in the stop mode, the pinch roller
Do not release the crimp of (81) on the capstan (12).
Capstan (12) and head cylinder (11) stop
To be done. This facilitates the transition from stop mode to play mode.
This is to do it quickly. But in this case, head silin from stop mode
Head cylinder
Put some tape on the magnetic tape between (11) and capstan (12).
It is necessary to give slack. Therefore, when shifting to the stop mode, the capstan
Is rotated in the RVS direction for a certain period of time to intentionally
Loosening is done. However, simply
It is possible to rotate the connector (12) in the RVS direction, as shown in FIG.
Supply reel base by driving idler gear (112)
(21) rotates and the tape rewinds.
Therefore, the following innovations have been made. That is, when shifting to the stop mode, as shown in FIG.
First, swing the idler (110) to the take-up reel stand (22) side.
Engage and RV the capstan motor (13) in this state
Start in the S direction, which causes the swing idler (110)
During the swinging period until moves to the supply reel stand (21) side
To the head cylinder with tape by the capstan (12)
-It is fed to the (11) side, causing tape slack.
It The following configuration is adopted to realize the above operation. FIGS. 37 (a) (b) (c) show the system controller (180).
It is sent to the driver (13a) of the capstan motor (13)
Capstan ON signal and capstan motor RVS
Timing of capstan RVS signal to rotate in the direction
Showing the To switch from play mode to stop mode,
In idle mode, the swing idler has already taken up the reel stand.
Since it is engaged with the side, as shown in Fig. 37 (a),
Pushstan is rotated in the RVS direction at 1x speed for a period of 50 msec.
Let the tape loosen. CUE (fast forward playback) mode or FF (fast forward tape)
When changing from stop mode to stop mode,
The amount of slack to give from the play mode to the stop mode
As shown in Fig. 37 (b), the
After stopping the rotation of the capstan,
Rotate the capstan (12) in the FWD direction at 1x speed,
After setting the same state as in the case of Fig. (A),
Loosen the tape with the work. Also, REV (rewind reproduction) mode or REW (tape winding)
When changing from (Return) mode to Stop mode,
Since the swing idler is engaged with the supply reel stand side,
As shown in Fig. 37 (c), first stop the capstan and then
The capstan is rotated at 1x speed in the FWD direction for about 1 second.
And the swing idler was engaged with the supply reel stand side.
After that, the tape is loosened by the same operation as shown in FIG. As a result, the stop mode, that is, the pinch roller is
Stops the rotation of the head cylinder while crimping to the stun
Even when the head cylinder is started, the head cylinder startup is smooth.
It will be done. Tape end processing method As mentioned above, in tape loading, supply reel
For pulling tape from both reel and take-up reel
Therefore, the tape caused by the friction between the head cylinder and the tape
Damage is minimized. However, when loading the tape, the cassette in the holder
Tape is in the tape end state, the take-up reel
The tape may be pulled out from the edge, which may damage the tape.
There is Therefore, at the start of tape unloading, the cassette
If is the tape end condition,
Wind the tape by the amount of tape withdrawn from the supply reel.
After returning, unloading is performed.
It Therefore, after removing the cassette from the VTR,
And VTR, and tape loading
In this case, the tape will be pulled out from both reels. In order to realize the above operation, the program shown in Fig. 40 is installed.
It is fixed. If an eject command is issued from the operation panel,
Tape top sensor (137) and tape end sensor
Whether the cassette is in the tape top state according to (136)
It is judged whether or not it is in the tape end state.
(Fig. 40 (192) (193) (194)). Both tape top sensor and tape end sensor
If it is ON, the cassette is loaded in the cassette holder.
If not, perform the eject action (Fig. 195).
Nau. If the tape top sensor is ON and the tape end sensor is
If it is OFF and both sensors are OFF,
After starting the cylinder (11), eject operation (195)
Do. Also, when the tape top sensor is off, the tape end sensor
When the service is ON, the cassette is at the tape end
So, after activating the head cylinder (11), pinch
Press the roller (81) onto the capstan (12) (40th)
(Fig. 196)). After that, the capstan (12) is run at 7 times speed for 1 second in the RVS direction.
Then, the tape is rewound as described above. Next, after stopping the capstan (12), eject operation
Perform (195). As a result, signal recording or playback is performed up to the tape end.
The loaded cassette was loaded into the VTR again and the tape loaded
Tape from both reels of the cassette
The tape is released and damage to the tape is prevented. The drawings and the description of the above embodiments are intended to illustrate the invention.
Which limits the invention described in the claims,
Or it should not be understood as reducing the range. Further, the configuration of each part of the present invention is not limited to the above embodiment,
Various modifications are possible within the technical range described in
Of course.

[Brief description of drawings]

FIG. 1 is a front view of the VTR according to the present invention in an eject mode, FIG. 2 is a right side view of the same as above, FIG. 3 is a right side view of the same in a standby mode, and FIG. 4 is a play mode. FIG. 5 is a right side view of the above, FIG. 5 is a plan view showing the main mechanism of the VTR in the standby mode, FIG. 6 is a plan view of the same in the ready mode, and FIG. 7 is a play mode. FIG. 8 is a plan view of the same as above, FIG. 8 is a perspective view of the VTR in the play mode, FIG. 9 is a perspective view of the same in the eject mode, and FIG. 10 is a partially exploded perspective view showing the mechanism on the main chassis. FIG. 11 is a partially exploded perspective view of the cylinder unit, FIG. 12 is a partially exploded perspective view of the gear mechanism driven by the loading motor, and FIG.
Fig. 14 is a front view of the fourth gear, Fig. 15 is a front view of the fourth gear, Fig. 15 is a front view of the power shaft and mode lever, and Fig. 16 is an exploded view showing the mechanism on the reel chassis. FIG. 17 is an oblique view, FIG. 17 is an exploded oblique view of the cassette holder and the holder lifting mechanism, FIG. 18 is a plan view of the mechanism mounted on the main chassis, FIG. 19 is a rear view of the mechanism mounted on the reel chassis, Figure is a plan view of the power shaft and the mechanism linked to it in the standby mode, Figure 21 is the same plan view in the ready mode, Figure 22 is the same plan view in the play mode, and Figure 23. Is a plan view of the same in the eject mode, FIG. 24 is an enlarged plan view showing the engagement state of the first gear and the second gear on the pressing surface, and FIG. 25 is a pinch in the standby mode. Plan view illustrating the over La pressing mechanism, 26
Fig. 27 is a plan view of the same in the ready mode, Fig. 27 is a plan view of the same in the play mode, Fig. 28 is a plan view of the reel base drive mechanism in the standby mode, and Fig. 29 is during loading. FIG. 30 is a plan view of the same as above, FIG. 30 is a plan view of the reel base drive mechanism and back tension lever mechanism at the time of normal reproduction in the play mode, and FIG. 31 is a plan view at the same time of rewinding reproduction in the play mode. Figure, third
2 is a left side view of the holder locking mechanism in the standby mode, FIG. 33 is a left side view of the same as the lock release operation, FIG. 34 is a left side view of the same in the eject mode, and FIG. A block diagram showing a control circuit of the capstan motor and the loading motor, FIG. 36 is a timing chart of various control signals at the time of unloading, FIG. 36A is a waveform diagram showing the driving voltage of the loading motor, and FIG. 37 is at the time of stopping the cylinder. 38 is a flowchart for explaining the tape slack processing method, FIG. 39 is a flowchart for explaining the tape winding method during unloading, and FIG. 40 is a flowchart for explaining the tape end processing method. 41 and 42 are side views for explaining the operation of the conventional apparatus. (1) …… Main chassis (11) …… Head cylinder (2) …… Reel chassis (21) …… Supply reel stand (22) …… Take-up reel stand (20) …… Cassette holder (31) …… Loading motor (34) …… Power shaft (4) …… Mode lever (81) …… Pinch roller (87) …… Slider (92) …… Back tension lever (110) …… Swing idler (128) …… Lock pin (146) …… Lock arm (144) …… Slide plate (160) …… Regulator plate

Claims (2)

[Claims] 1. A pair of reel stands (21) (22) and a pinch roller crimping mechanism (8) on a main chassis (1) equipped with a head cylinder (11) and a tape loading mechanism (5).
Reel chassis (2) with a head cylinder (1
The tape loading mechanism is guided and supported so as to be able to approach and separate from the head cylinder (1), and the reel chassis (2) moves from the first moving end, which is the maximum distance from the head cylinder (11), to the second moving end on the head cylinder side. In a recording / reproducing apparatus in which (5) loads a magnetic tape in a cassette and winds it around a head cylinder (11), a loading motor (31) and a tape loading mechanism (which are connected to a pinch roller pressure bonding mechanism (8)). 5) and is connected via an intermittent rotation mechanism,
The intermittent rotation mechanism shifts from the rotation transmission state to the rotation transmission stop state during the movement process of the reel chassis (2) from the first movement end to the second movement end, and the capstan motor (13) has a control circuit. After the reel chassis (2) starts moving from the second stop position to the first stop position, a means for detecting a time point when the tape loading mechanism (5) starts an unloading operation is connected, and the detecting means detects the detection means. On the basis of the above, the capstan (12) and one reel stand are rotated in the tape winding direction, and the tape pulled out on the tape traveling path is collected in the cassette. 2. The control circuit of the capstan motor (13) sets the rotation speed of the capstan (12) low for a certain period from the start of the unloading operation of the tape loading mechanism (5), and during that period. The tape winding device according to claim 1, which produces a control signal for setting a high rotation speed of the capstan (12) after the passage.