JPH0668867B2 - Tape loading mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape loading mechanism incorporated in a magnetic recording / reproducing apparatus such as a video tape recorder or a video camera.

[Conventional technology]

5 (A) and 5 (B) are plan views respectively showing a part of the conventional tape loading mechanism. In the figure, 1
Is a guide rail. In this guide rail 1, an inner rail portion 1a and an outer rail portion 1b are integrally formed, and a guide groove 2 is formed by these both rail portions 1a and 1b. The guide rail 1 has a plurality of mounting holes 1c, and these mounting holes 1c
The mounting bosses 3a to 3f of the chassis 3 shown in FIG.
Is fixed via a screw member (not shown).

At the unloading position of each guide groove 2, a loading means 4 on the supply side and a loading means 5 on the take-up side are respectively arranged. These loading means 4 and 5 are mounted on the pole bases 4a and 5a movably engaged with the guide groove 2, vertical guide rollers 4b and 5b rotatably mounted on the pole base, and on the pole base. Consists of tilt guides 4c and 5c attached. One ends of connecting arms 6, 6 are pivotally supported by the pole bases 4a, 5a. The other ends of these connecting arms 6, 6 are pivotally supported by a connecting portion 7a of each loading 7 (only one of which is shown in FIG. 1B) arranged concentrically above and below.

In the tape loading mechanism having the above configuration,
When the loading 7, 7 is rotationally driven in the opposite direction by a drive unit (not shown), the pole bases 4a, 5a are pulled through the connecting arms 6, 6, so that these pole bases 4a, 5a are
It is guided from the unloading position shown in FIG. 1A to the loading completion position through the guide groove 2. Therefore, the magnetic tape is pulled out from the mounted tape cassette via the vertical guide rollers 4b, 5b and the inclined guides 4c, 5c,
The magnetic tape thus taken out is wound around a rotary head drum (not shown), so that the magnetic recording / reproducing apparatus can perform recording, reproduction and the like.

By the way, the above-mentioned conventional tape loading mechanism is assembled by an automatic assembling machine as follows. That is, the loading means 4 and 5 are preliminarily engaged and arranged in the unloading groove portions 2a of the guide grooves 1 and 2 of the guide rail 1 by the robot hand on the component supply side, and in this state, the robot hand on the assembly side guides. The rail 1 is transferred onto the chassis 3 and fixed to the chassis 3 via the mounting bosses 3a to 3f.
After that, the connecting arms 6 and 6 are pivotally supported on the loading rings 7 and 7 by pins.

[Problems to be Solved by the Invention]

Now, while holding the guide rail 1 by the robot hand on the parts supply side and the assembly side respectively, the connecting arm
In order to connect 6, 6 with the loading ring 7, it is necessary to hold them in place with another robot hand. However, in the conventional tape loading mechanism, since the inner rail portion 1a and the outer rail portion 1b of the guide rail 1 are integrally formed, the inner rail portion 1a is positioned on the connecting arm 6. Therefore, control of the robot hand for holding the connecting arm becomes very complicated.

As another assembling order, after fixing the guide rail 1 to the chassis 3, the loading means 4 and 5 are engaged in the guide grooves 2 and 2 from the opening side and conveyed to the unloading groove portions 2a and 2a, and then the connecting arm 6 is connected. Is connected to the loading ring 7. In this case, the connecting arm 6 may be held by the robot hand only on the assembly side. However, it is necessary to prevent the robot hand from coming into contact with the mounting bosses 3b, 3c, etc. when the loading means 4, 5 is engaged in the guide groove 2. Therefore, there is a drawback that the control of the robot hand becomes more complicated.

The present invention has been made to solve the above problems, and an object thereof is to provide a tape loading mechanism having a structure suitable for automatic assembly.

[Means for Solving the Problems]

In the tape loading mechanism of the present invention, the guide rail is formed by separate inner rail material and outer rail material, the inner rail material is fixed to the drum base for mounting the rotary head drum, and the outer rail material is provided with loading means. It is characterized in that an unloading groove portion forming a part of the guide groove is provided for positioning at the unloading position.

[Action]

After fixing the outer rail member to the chassis, the loading means is inserted into the unloading groove and positioned.

Next, the connecting arm is pivotally supported on the drive unit side.

Next, the drum base is fixed to the chassis, the inner rail member is arranged, and the guide groove is formed.

Therefore, a mounting boss for mounting the inner rail member is not required, and the robot hand holding the connecting arm can be linearly moved and controlled. Further, it is not necessary to hold the connecting arm on the component supply side.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are a plan view of a tape loading mechanism according to the present invention and a perspective view of a main part thereof, and FIG. 3 is a plan view of a drive part thereof.

First, in FIG. 2, 10 indicates a chassis. The chassis 10 is provided with a substantially circular recess 10A, and a plurality of mounting bosses 10a to 10f are integrally formed around the recess 10A. Further, a plurality of other mounting bosses 10g to 10i are integrally formed around the recess 10A. The mounting bosses 10a to 10i are provided with screw holes, respectively.

Further, in FIG. 2, 8 indicates a guide rail. The guide rail 8 includes outer rail members 11 and 12 and separate inner rail members 13 and 14 fixed to the drum base 52 to which the rotary head drum 9 is attached. A plurality of through holes 1 through which fixing screws 53 are inserted in the outer rail members 11 and 12.
1a and 12a are provided. These through holes 11a and 12a are provided at positions corresponding to the mounting bosses 10a to 10f of the chassis 10. A central hole 8B connecting the outer rail members 11 and 12 is provided with a mounting hole 8A. On both sides of this central part 8B,
Unloading groove portions 15a and 16a forming part of guide grooves 15 and 16 described later are formed. And the outer rail material 1
As shown in FIG. 1, the reference numerals 1 and 12 locate the through holes 11a and 12a in the mounting bosses 10a to 10f on the chassis 1 and allow the mounting boss 10i to be inserted therethrough. It is fixed to the chassis 1 by screwing a fixing screw 53 into the screw hole.

On the other hand, as shown in FIG. 2, the drum base 52 has a substantially triangular protrusion 52A, and the protrusion 52A is provided with a through hole into which the fixing screw 54 is inserted. Also, the drum base 52
A through hole into which the other fixing screws 54, 54 are inserted is provided in (see FIG. 1 and FIG. 2). Then, the inner rail members 13 and 14 are fixed to the drum base 52 as described above. The drum base 52, as shown in FIG.
The protrusion 52A is positioned on the mounting boss 10i, positioned on the other mounting bosses 10g, 10h, and fixed to the chassis 1 by screwing the fixing screw 54 into the screw holes of each mounting boss 10g-10i. There is. Therefore, as shown in FIG. 1, when the drum base 52 is fixed, the inner rail members 13 and 14 are positioned inside the outer rail members 11 and 12 at regular intervals. Therefore,
A guide groove 15 is formed between the outer rail material 11 and the inner rail material 13, and a guide groove 16 is formed between the other outer rail material 12 and the inner rail material 14.
Is formed. And the inner rail material 13, 14 and the outer rail material 1
In the state where 1, 12 are arranged as shown in FIG. 1, the unloading groove portion 15a communicates with the guide groove 15 and the guide groove 1
The unloading groove 16a communicates with 6.

Take-up side loading means 17 and supply side loading means 18 are provided in the unloading grooves 15a and 16a of the guide grooves 15 and 16, respectively, and stoppers 19 are provided at the loading completion positions. Both loading means 17 and 18 have a vertical guide roller 21 rotatably supported on the pole base 20 and an inclined guide 22, and tape regulation flange portions 21a are attached to the upper and lower ends of the vertical guide roller 21. ing. The stopper 19 is attached to the drum base 52, and has a recess 19a into which the small diameter portion of the upper end of the vertical guide roller 21 is inserted.

As shown in FIGS. 1 and 2, one end of a connecting arm 24 is pivotally supported on the lower surface of both pole bases 20, 20 via a pin. The other end of each connecting arm 24 is, as shown in FIGS. 2 and 3, a take-up side loading ring 25.
And the connecting parts 24a, 26 of the loading ring 26 on the supply side
It is pivotally supported by a screw member 55. These loading rings 25 and 26 are concentrically arranged in the recess 10A of the chassis 10.
(See FIG. 2), and the loading ring 25 side is located above. Third on loading rings 25, 26
As shown in the drawing, circular elongated holes 25b and 26b are formed, and a coil spring 27 is arranged in these elongated holes. One ends of these coil springs 27 are attached to respective edge portions of the long holes 25b and 26b, and the other ends are attached to one end of the slide member 28. Each slide member 28 has an expanded diameter portion 28a at both ends.
Is provided, and the enlarged diameter portion 28a on the other end side is engaged with the short elongated holes 25c and 26c, respectively.

Teeth 25d are provided on the outer peripheral surface of the upper loading ring 25. As shown in FIG. 3, these teeth 25d have
Idler gear 29 meshes. Teeth 26d are provided on the outer peripheral surface of the lower loading ring 26.
The other idler gear 30 meshes with. The lower drive gear 31 attached to the shaft 29a of the idler gear 29 meshes with another idler gear 30. Therefore, when the idler gear 30 rotates, the idler gear 29 rotates via the drive gear 31, so that the loading rings 25 and 26 rotate in opposite directions. A drive gear 32 having a larger diameter meshes with the idler gear 30. A loading gear 33 is attached to the shaft 32a of the drive gear 32, located above the gear 32. The loading gear 33 meshes with a gear portion 35 provided on the lower surface of the control cam 34. There are teeth 34a on the peripheral surface of the control cam 34.
Are provided, and a drive gear 36 meshes with these teeth 34a. A transmission gear 37 is attached to a shaft 36a of the drive gear 36, and another gear 38 is meshed with the gear 37. A pulley 39 is attached to the shaft 38a of the gear 38, and a belt 41 is provided between the pulley 39 and the small-diameter pulley 40.
Is wrapped around. The pulley 40 is attached to the shaft of the loading motor 42.

By the way, when the tape cassette is installed, the magnetic tape
Inside the tape path part of 56, both loading means 17,1
The vertical guide roller 21 and the inclined guide 22 and the capstan 43 of 8 are located. In the figure, 46 is a supply reel mounted on a reel disk (not shown), and 47 is a take-up reel.

Here, the operation of the loading mechanism having the above configuration will be described.

In FIG. 3, when the loading motor 42 is driven in the forward direction by mounting the tape cassette, the pulley 39 rotates via the pulley 40 and the belt 41, so the drive gear 36 rotates via the gears 38 and 37, and the control cam Rotate 34 counterclockwise (see arrow). When the control cam 34 rotates, the loading gear 33 rotates in the clockwise direction via the gear portion 35, so that the idler gear 30 rotates in the counterclockwise direction via the drive gear 32. Therefore, the lower loading ring 26 rotates clockwise by the idler gear 39. On the other hand, when the idler gear 30 rotates, the other idler gear 29 rotates clockwise via the drive gear 31, so that the upper loading ring 25 rotates counterclockwise.

When both loading rings 25, 26 rotate in opposite directions, the connecting arms 24, 24 are pulled, so that the pole bases 20, 20 are guided from the unloading groove portions 15a, 16a as shown by the one-dot chain line in FIG. It moves by being guided to the stoppers 19 and 19 side via the grooves 15 and 16, respectively. Therefore, the magnetic tape 56
Is drawn from the supply reel 46 by both loading means 17, 18.

FIG. 4 is a plan view showing a state where the loading operation is completed. That is, the pole base 2 moved as described above.
The positions of 0 and 20 are detected when they come into contact with the stoppers 19 and 19, and they are stopped and positioned at the loading completion position shown in FIG. Therefore, the drawn magnetic tape 56 is wound around the rotary head drum 9. Further, the pinch roller 44 is pressed against the capstan 43, and the A / C head 48 is moved and pressed against the magnetic tape 56. Furthermore, when the pole base 20 on the loading means 17 side moves, the tension arm 45 rotates counterclockwise and the tension pole 45a
Then, tension is applied to the magnetic tape 56. Therefore,
After that, recording and reproduction of the magnetic tape 56 can be performed.

Next, a procedure for assembling the tape loading mechanism of the present invention by the automatic assembling machine will be described.

First, set the loading rings 25 and 26 to the recess 10A of the chassis 10.
, And assemble as described above.

Next, the outer rail members 11 and 12 of the guide rail 8 are fixed to the chassis 10 via the mounting bosses 10a to 10f as described above.

Next, the loading means 17 and 18 are inserted into the unloading groove portions 15a and 16a of the outer rail members 11 and 12 and positioned. In this case, as shown in FIG. 2, the loading means 17 and 18 are linearly conveyed by the robot hand and engaged in the unloading grooves 15a and 16a. In other words, since the inner rail materials 13 and 14 are fixed to the drum base 52, the inner rail material 1
The mounting boss for fixing 3,14 is unnecessary. Therefore,
Since there is no mounting boss for the inner rail material inside the outer rail materials 11 and 12, loading means 1
7,18 can be transported linearly. Further, since the inner rail members 13 and 14 are not present, the holding control of the connecting arm 24 by the robot hand is easy.

Further, the connecting arms 24, 24 are pivotally supported on the loading rings 25, 26 as described above. Also in this case the inner rail material 1
Since there are no 3,14, pivot work is easy.

After that, the drum base with the rotary head drum 9 attached
As described above, the 52 is fixed to the chassis 10, and the inner rail members 13 and 14 and the outer rail members 11 and 12 form the guide grooves 15 and 16.

〔The invention's effect〕

As described above, according to the present invention, the guide rail is formed of separate inner rail material and outer rail material, the inner rail material is fixed to the drum base, and the outer rail material is provided with the unloading groove portion. Therefore, the loading means can be linearly conveyed by the robot hand without considering the mounting boss, can be inserted into the unloading groove and positioned, and the holding of the connecting arm by the robot hand can be performed. It can be performed without being disturbed by the rail material. Therefore, it is possible to provide a tape loading mechanism having a structure suitable for automatic assembly.

[Brief description of drawings]

1 and 2 are a plan view and a perspective view of an essential part of a tape loading mechanism according to the present invention, FIG. 3 is a plan view showing a drive part of the tape loading mechanism of FIG. 1, and FIG. FIGS. 5A and 5B are a plan view showing a state at the time of completion, and a plan view showing a guide rail of a conventional tape loading mechanism together with loading means and a plan view on the chassis side. 8 ... Guide rail, 10 ... Chassis, 10a-10i ... Mounting boss, 11, 12 ... Outer rail material, 13, 14 ... Inner rail material, 15, 16 ...
Guide grooves, 15a, 16a ... Unloading groove portions, 17, 18 ... Loading means, 24 ... Connecting arms, 25, 26 ... Loading ring, 52 ... Drum base.

Claims (1)

[Claims] 1. A drum base for mounting a rotary head drum to a chassis, a loading means for winding a magnetic tape pulled from an unloading position to a loading completion position and winding the magnetic tape around the rotary head drum, and a driving unit for the loading means. In a tape loading mechanism including a connecting arm connected to the guide rail and a guide rail having a guide groove for guiding the loading means from the unloading position to the loading completion position, the guide rails are arranged inside and outside, respectively. The inner rail member is fixed to the drum base, and the outer rail member is used to position the loading means at the unloading position. Forming part of the groove Tape loading mechanism characterized by having a groove for unloading.