JPH0449558A - Reel base interval adjusting device - Google Patents

Abstract

PURPOSE:To simplify the structure by oscillating at least one of a pair of reel bases around an oscillating center. CONSTITUTION:When an oscillating arm 21 is oscillated in the direction of an arrow (e), a pair of right and left reel base holding members 20 are oscillated in the direction of an arrow (d) around an oscillating center shaft 29 through an interlocking member 22 and are brought into contact with stoppers 24a of these members 20. A pair of right and left reel bases 12 are oscillated in the direction of the arrow (d) by the pair of right and left reel base holding members 20, and an interval L1 between the pair of reel bases 12 is adjusted to coincide with the reel interval of large cassettes 9. This reel base oscillating system simplifies the constitution of a reel base interval adjusting device.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example G. Description of cassette loading device and detection member (Fig. 6A -
(Figure 8B) G2 Explanation of reel stand interval adjustment device and detection member (1st A)
(Figures to Figures 5B) H Effects of the Invention A Field of Industrial Application The present invention relates to a reel stand interval adjustment device that is applied to a cassette loading device that selectively loads multiple types of cassettes with different reel intervals. .

B. Summary of the Invention The present invention provides a reel stand interval adjustment device that adjusts the interval between reel stands according to the reel interval of the cassettes when multiple types of cassettes with different reel intervals are selectively mounted on a pair of reel stands. The structure can be simplified by making at least one of the reel stands swing and adjust the interval between the reel stands.

C. PRIOR TECHNOLOGY The applicant of the present invention has disclosed, for example, according to prior applications such as Japanese Utility Model Application Publication No. 6198031, that when multiple types of cassettes with different reel intervals are selectively mounted on a pair of reel stands,
The patent has previously filed an application for a reel stand interval adjustment device configured to adjust the interval between reel stands in accordance with the reel interval of a cassette.

In this prior application, a pair of reel stands are moved linearly using a pair of guide shafts, respectively, and the interval between the reel stands is adjusted.

D Problems to be Solved by the Invention However, in the structure of the prior application in which a pair of reel stands are moved linearly using a pair of guide shafts, the number of parts is large, the structure is complicated, and the cost is extremely high. There was a problem with sticking to the surface.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reel stand interval adjustment device that can adjust the interval between reel stands without using a pair of guide shafts.

E. Means for Solving the Problems In order to achieve the above object, the reel stand interval adjusting device of the present invention swings at least one of a pair of reel stands around a swing center. It is configured to adjust the interval between a pair of reel stands.

F. Function The reel stand interval adjustment device configured as described above is configured to adjust the interval between the reel stands by swinging the reel stands, so it can be adjusted without using a pair of guide shafts. The spacing between the reel stands can be adjusted.

G. Embodiment Hereinafter, an embodiment in which the present invention is applied to a front-loading type video tape recorder will be described with reference to the drawings.

G1 First, the cassette mounting device and the detection member will be explained with reference to FIGS. 6A to 8B.

The cassette mounting device 1 has a cassette holder 2, which is horizontally arranged between a pair of left and right holder support plates 4 vertically mounted on a chassis 3, and is mounted on both left and right side plates 2a of the cassette holder 2. The attached plurality of guide rollers 5 are loosely fitted into a plurality of substantially L-shaped guide grooves formed of horizontal guide grooves 6 and vertical guide grooves 7 provided on both holder support plates 4. The cassette holder 2 is guided by the horizontal guide groove 6 and pulled in the direction of arrow a from the cassette insertion position shown in FIGS. 7A and 8A to the cassette retraction position shown by solid lines in FIGS. 7B and 8B. After that, the cassette is guided by the vertical guide groove 7 to the cassette mounting position shown by the dashed line in FIGS. 7B and 8B, and has an approximately 17-shaped movement locus in which the cassette is vertically lowered in the direction of the arrow mark. Note that the cassette boulder 2 is configured to be driven back and forth along the above-mentioned movement locus by a holder drive mechanism (not shown). Note that in the following description, the left-right direction refers to the left-right direction in FIGS. 6A and 6B.

This cassette mounting [1] consists of two types of cassettes 9.
It is possible to use 10 properly. The large cassette 9 has a large cassette length in the left and right direction because the distance I21 between the left and right pair of reels 9a (hereinafter referred to as the reel distance) is large, and the small cassette 10 has a large cassette length in the left and right direction. Interval (hereinafter referred to as reel interval) 7
! 2 is small, the cassette length in the left and right direction is configured to be small.

These large and small cassettes 9 and 10 are constructed so that they can be selectively inserted into the cassette holder 2 which has been returned to the cassette insertion position from the direction of arrow a. At this time, as shown in FIG. 6A, the large cassette 9 is inserted into the inside of the left and right side plates 2a of the cassette holder 2, and as shown in FIG. 6B, the small cassette 10 is inserted into the insertion guide (not shown). guided by the cassette holder 2
It is configured to be inserted into the center in the left-right direction.

After selectively inserting these large and small cassettes 9.10, the cassette holder 2 is moved forward in the directions of arrows a and b from the cassette insertion position to the cassette mounting position via the cassette retraction position, thereby removing the large and small cassettes 9. 10 pairs of left and right reels 9a%10a are configured to be selectively mounted on a pair of left and right reel stands 12 arranged at the cassette mounting position.

The detection member 14 detects the sizes of the large and small cassettes 9 and 10 selectively inserted into the cassette holder 2. This detection member 14 is connected to one side plate 2 of the cassette holder 2.
a, and is guided by a plurality of guide pins 15 and a plurality of vertical guide grooves 16, and is configured to be movable in the vertical direction, ie, the direction of arrow c1C'. A detection roller 1.4a attached to the upper end of the detection member 14 is inserted inside one side plate 2a of the cassette holder 2, and a drive pin 14b is horizontally attached to the lower end of the detection member 14. Note that this detection member 14 is biased downward in the direction of arrow C by a double biasing spring 17.

As shown in FIGS. 6A and 7A, when the large cassette 9 is horizontally inserted into the cassette holder 2 from the direction of arrow a, the detection roller 14a detects the upper surface 9b of the large cassette 9.
, the detection member 14 is raised in the force direction of arrow C' against the spring 17, and the drive pin 14b is moved to the raised position P,
is set to

As shown in FIGS. 6B and 8B, when the large cassette 9 is inserted horizontally into the cassette holder 2 from the direction of arrow a, the detection roller 14a does not come into contact with the small cassette 10 at all. The detection member 14 remains lowered in the direction of arrow C by the spring 17, and the drive pin 14b
is set at the lowered position P2.

Then, place the large and small cassettes 9.10 into the cassette holder 2.
After the selective insertion, when the cassette holder 2 is pulled horizontally in the direction of arrow a from the cassette insertion position to the cassette retraction position, the detection member 14 is moved horizontally in the direction of arrow a together with the cassette holder 2. At that time, the drive pin 14b is configured to selectively drive a reel stand interval adjustment device, which will be described later. As shown in FIGS. 7B and 8B, when the cassette holder 2 is vertically lowered in the direction of the arrow from the cassette retracting position to the cassette mounting position, the plurality of guide pins 15 of the cassette holder 2 are connected to the detection member. 14 within the plurality of guide grooves 16 in the direction indicated by the arrow. The operation of ejecting the large and small cassettes 9 and 10 from the cassette loading position to the cassette insertion position via the cassette retracting position is the reverse operation of the above-mentioned operation.

02 Next, the reel stand interval adjusting device and the detection member will be explained with reference to FIGS. 1A to 5B.

The reel stand interval adjustment device 219 includes a pair of left and right reel stand holding members 20, one swing arm 21, one interlocking member 22, one swing drive body 23, and a pair of left and right stoppers 24a, 24b. and one limiter spring 25.

The pair of left and right reel stand holding members 20 are composed of horizontal plate materials, and the pair of left and right reel stands 12 are rotatably attached to the upper part of one end side via the pair of vertical reel center shafts 12a, and the other end side is a horizontal plate member. An arrow d,
It is attached so as to be swingable in the d' direction. The pair of left and right reel stand drive gears 27 rotated around the outer periphery of the pair of left and right rocking center shafts 26 are connected to the pair of left and right reel stand center shafts 12a.
It is meshed with a pair of left and right reel stand gears 28 which are rotated together with the left and right pair of reel stands 12 on the outer periphery of the reel stand. Note that the pair of left and right reel stand drive gears 27 are configured to be rotationally driven by a reel motor (not shown).

A pair of left and right stoppers 24a and 24b are provided on the chassis 3.
Regulates the swing angle (movement range) of the pair of left and right reel stand holding members 20 that are fixed to the top and swing in the directions of arrows d and d' about the pair of left and right swing center shafts 26. .

The swinging arm 21 is made of a horizontal plate, and one end is connected to the second
The arrows e and e' are centered around the pivot axis 29, which is the pivot center of the
A long hole 3 provided at the other end is configured to be able to swing freely in the direction.
0 is loosely fitted into a drive pin 31 provided at an eccentric position on the swing drive body 23.

The interlocking member 22 is composed of a horizontal plate having a substantially single-letter shape, and its center portion is loosely fitted into a vertical guide pin 32 fixed to the chassis 3 through a long hole 33. and,
The center part of this interlocking member 22 is connected to the substantially center part in the length direction of the swing arm 21 via a pin 34, and both ends are connected to a pair of left and right reel stand holding members via a pair of pins 35 and an elongated hole 36, respectively. 20.

The swing driving body 23 is mounted to be swingable around a vertical swing center shaft 27 fixed on the chassis 3 at a swing angle θ1 of 180e or more, and a swing gear 23a is provided on the outer periphery. There is.

The limiter spring 25 is constituted by a tension spring, and has a pair of scissor-shaped limiter arms 38a, 38.
It is attached between one end of b.

These pair of limiter arms 38a, 38b are mounted so as to be swingable in the directions of arrows f and f' around a common fulcrum shaft 39 fixed vertically on the chassis 3. Swing center shaft 2 at the other end
9 is held in common. Therefore, limiter spring 2
5, the swing center shaft 29 is elastically held at a fixed position.

Note that a stopper 40 fixed on the chassis 3 serves as a limiter for these pair of limiter arms 38a and 38b.
It is interposed between the spring 25 and the fulcrum shaft 39.

As shown in FIG. 2, this reel stand interval adjustment device 19 alternately swings the swing drive body 23 in the directions of arrows g and g' around the swing center axis 37 at a swing angle θ1 of 180'' or more. When the swing arm 21 moves, the drive pin 31 moves the swing arm 21 to the swing center angle 2.
90 in the directions of arrows e and e'.

As shown in FIG. 1A, when the swing arm 21 swings in the direction of the arrow e, the pair of left and right reel stand holding members 20 move around the swing center axis 20 via the interlocking member 22 as shown in the arrow d.
The pair of left and right reel stand holding members 20 comes into contact with one of the stoppers 243. and,
The left and right pair of reel stands 12 are swung in the direction of arrow d by the left and right pair of reel stand holding members 20, and the distance Ll between the left and right pair of reel stands 12 (hereinafter referred to as reel stand interval) is The interval is adjusted to match the reel interval 7!1 of 9.

Further, as shown in FIG. 1B, the swing arm 21 is
When it swings in the direction ', the pair of left and right reel stand holding members 20 move around the swing center axis 20 in the direction of arrow d via the interlocking member 22.
' direction, the pair of left and right reel stand holding members 20 come into contact with the other stopper 24b. Then, the pair of left and right reel stands 12 are swung in the direction of arrow d by the pair of left and right reel stand holding members 20, and the distance L2 between the pair of left and right reel stands 12 (hereinafter referred to as inter-reel stand gap) is The interval is adjusted to match the reel interval β2 of the small cassette 10.

At this time, as shown in FIG.
1A and 1B, the pair of left and right reel stand holding members 20 touch the stopper 2.
4a and 24b alternately abut from the directions of arrows d and d', thereby preventing the swing drive body 23 from rotating in the opposite direction.

Moreover, at this time, as shown in FIG.
The pin 34 swings and drives the pair of left and right reel stand support members 20 in the directions of arrows d and d' through the interlocking member 22 by the swing arm 21 with a swing angle of θ3 about the swing center axis 29 of the pin 34. If the swing angle around the swing center axis 29 is θ4, then θ3>θ4. In addition, θ4 is each -
It is regulated in accordance with the swing angle of the pair of left and right reel stand holding members 20, which is regulated by the pair of stoppers 24a and 24b.

As a result, as shown in FIGS. 1A and 1B, the pair of left and right reel stand holding members 20 are attached to each pair of strike bars 24a.
, 24b from the direction of the arrow dSd', the pair of limiter arms 38a, 38 form a scissor shape.
The swing center shaft 29 held at b is the limiter spring 2
5, and the spring force of the limiter spring 25 at this time causes the pair of left and right reel stand holding members 20 to move against each pair of stoppers 24a.

24b elastically pressed alternately from the directions of arrows d and d'.

Therefore, the pair of left and right reel stands 12 are shown in FIGS. 1A and 1B.
One limiter for the reel stand spacing shown in the figure and L2.
The spring 25 ensures accurate positioning.

Note that when it comes to driving the pair of left and right reel stand holding members 20 by the swinging arm 21 via the interlocking member 22, it is not necessary to make the pair of left and right reel stand holding members 20 swing, and the pair of left and right reel stand Stand holding member 20
Alternatively, the swing drive body 23 may be swing-driven by a motor or the like.

By the way, on one side of the chassis 3, a pair of upper and lower racks 42 and 43, which are driven members, are stacked in two stages, one above the other, within the movement locus of the drive pin 14b of the detection member 14 in the directions of arrows a and a'. It is placed horizontally. These pair of upper and lower racks 42 and 43 are attached to a plurality of guide bins 44 vertically fixed on the chassis 3 through elongated holes 45a and 45b, respectively, so as to be movable in the directions of arrows a and a'. A pair of pinions 46 and 47 of the same diameter are meshed with the upper and lower racks 42 and 43, respectively, and each pinion shaft 46a is fixed vertically on the chassis 3.
, 47a, and both pinions 46, 47 are meshed with each other. One pinion 47 is meshed with a swing gear 23a formed on the outer periphery of the swing drive body 23.

Therefore, as explained in FIGS. 7A and 7B, the large cassette 9 is selectively inserted into the cassette holder 2 from the direction of the arrow a, and the detection member 14 rises against the spring 17 in the direction of the arrow a'. After the drive pin 14b is set to the raised position P+, when the cassette holder 2 is moved horizontally in the direction of arrow a from the cassette insertion position to the cassette retraction position, the drive pin 14b is moved as shown in FIG. 5A. comes into contact with the end surface 42a of the upper rack 42, and drives the upper rack 42 in the direction of arrow a. At this time, the lower rack 43 is moved in the direction of arrow a via pinions 46 and 47.

Further, as explained in FIGS. 8A and 8B, the small cassette 10 is selectively inserted into the cassette holder 2 from the direction of arrow a, and the detection member 14 and drive pin 14b are
When the cassette holder 2 is moved horizontally in the direction of arrow a from the cassette insertion position to the cassette retraction position while being set at the lowered position P2 in the direction of arrow C by 7, the drive pin 14b is moved as shown in FIG. 5B. Lower rack 43
The lower rack 43 is brought into contact with the end surface 43a of the arrow a.
drive in the direction. At this time, the upper rack 42 is moved in the direction of arrow a' via pinions 46 and 47.

As described above, by driving the pair of upper and lower racks 42.43 alternately in the direction of the arrow a by the drive pin 14b of the detection member 14, the swing drive body 23 is rotated as shown in FIG. 1A via the pinion 46.47. As shown in FIG. 1B and FIG.
The reel stand interval of the pair of left and right reel stands 12 is automatically adjusted to L l (!: L t).

In short, the cassette mounting device 1 and the reel stand interval adjustment device 19 are moved up and down by the detection member 14, which is moved together with the cassette holder 2, during the movement of the cassette holder 2 from the cassette insertion position to the cassette mounting position. By selectively driving the pair of racks 42 and 43, the reel stand spacing between the left and right pair of reel stands 12 is adjusted to Ll and L2.
automatically adjusts to. After the reel stand interval is adjusted, the pair of left and right glue 9a, 10a of the large and small cassettes 9, 10 selectively mounted at the cassette mounting position is operated to be mounted on the pair of left and right reel stands 12.

Note that the pair of racks 42 and 43 do not necessarily need to be arranged one above the other; for example, the racks 42 and 43 and the swing drive body 23 may be arranged on the same horizontal plane with a gap between them, and the racks 42 and 43 may be spaced apart from each other. The rack 43 disposed between the drive body 23 and the drive body 23 is configured as a double-sided rack, and a pair of pinions 46 and 47 are provided between the racks 42 and 43 and between the rack 43 and the swing drive body 23. They may be arranged so as to mesh with both of them.

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

Furthermore, the present invention is not limited to cassette-type video tape recorders, but can be applied to various cassette-type recording and reproducing devices.

H Effects of the Invention Since the present invention is configured as described above, it produces the following effects.

Since the reel stand is configured to swing and move to adjust the interval between the reel stands, the interval between the reel stands can be adjusted without using a pair of guide shafts.
The number of bins can be reduced, the structure can be simplified, and costs can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and the drawings show an embodiment of the present invention.
Figures 1B and 1B are plan views showing the reel stand interval adjustment device;
2 is a plan view showing the swinging drive body and the swinging arm; FIG. 3 is a view taken along the arrow A-A in FIG. 1A showing the reel stand holding member; FIG. 5A and 5B are perspective views showing the rack and pinion, and FIGS. 6A and 6B are 13-13 of FIG. 1A showing the cassette loading device.
B arrow view and C-C arrow view of Figure 1B, Figures 7A and 7B are D-D arrow view of Figure 6A, Figure 8A and Figure 8B
The figure is a view taken along the line EE in FIG. 6B. Note that the reference numbers used in the drawings are 12---------Reel stand L+, 1.2. - Reel stand interval adjustment device Reel stand holding member Swing center line Reel stand interval

Claims (1)

[Claims] A reel stand interval adjustment device configured to adjust the interval between a pair of reel stands by swinging at least one of the pair of reel stands around a swing center.