JPH0778981B2 - Video cassette lock plate built-in device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a video cassette lock plate assembling apparatus for assembling a lock plate into a cassette case body that houses a magnetic tape.

(Prior Art) Conventionally, various magnetic tape cassettes in which a magnetic tape is housed in a case have been developed and put into practical use. Of these magnetic tape cassettes, the video cassette shown in FIG. 4 is one end surface of a cassette case body 3 housed in a case 1 composed of an upper half 1A and a lower half 1B of the magnetic tape 2, On the tape running surface 1a on which the magnetic tape 2 is exposed and running, a card panel 6 having a guard portion 4 parallel to the running surface is provided. The guard panel 6 is provided at a side portion so that the guard portion can have a closed position that covers the magnetic tape on the running surface and an open position that exposes the magnetic tape on the running surface. The support shaft 7 is engaged with the hole 8 of the case 1 and is rotatably attached to the cassette case body 3.

A lock plate is provided in the cassette case body 3 to lock the guard panel in the closed position when the cassette is not used. That is, as shown in FIG. 5, the lock plate 10 includes a plate body 11 having a plate shape.
And first and second protrusions 12 and 13 that are planted in the plate body 11 and project in a direction substantially perpendicular to the plate body, and a shaft that is integrally formed with the plate body 11 and extends in the horizontal direction. The lower half 1B includes a portion 14 and a torsion spring 15 formed by engaging a coil portion 15a with the shaft portion 14.
It is mounted in the lock plate mounting portion 20 formed at the side end of the. Two holes 21 and 22 are formed in the side wall 24 of the lock plate mounting portion 20.
Is attached to the lock plate attachment portion 20 while engaging the protrusions 12 and 13 with the holes 21 and 22, respectively. At that time, the torsion spring has one foot on the plate body.
11 is brought into contact with the back surface (the surface opposite to the side where the projections 12 and 13 are provided), and the other foot is brought into contact with the inner wall surface 23 of the lock plate mounting portion 20 facing the back surface. As a result, the protrusions 21 and 22 are urged from the holes 21 and 22 toward the outside of the case. The inner surface of the guard panel 6 is formed with a recess 5 that can be engaged with the projection 13, and the projection 13 biased outward as described above can be engaged with the recess 5. This prevents the guard panel from rotating to the open position and is locked in the closed position. Also, the protrusion
12 is exposed to the outside without being covered by the guard panel 6, and when a video cassette is loaded in the cassette deck during its use, a member on the deck side pushes this protrusion 12 to lock the entire lock plate 10 into the cassette. Push it into the case body 3 to unlock the guard panel 6.

The above-mentioned lock plate is incorporated into the cassette case body by using plate holding means as shown in FIG. 6 and mounting means as shown in FIG.

That is, the lock plates 10 are separated and supplied one by one by a part feeder (not shown), and as shown in FIG. 6 (a), the groove portions 3 for receiving the protrusions 12 and 13 are provided.
By inserting the plate body 11 into the holding portion 33 of the plate holding means 30 having 1, 32, it is held in an upright state. Then, the shaft spring 14 of the lock plate 10 is engaged with the torsion springs 15 which are similarly separated and supplied one by one by a parts feeder. The plate holding means 30 holding the lock plate 10 in this manner is conveyed to a predetermined plate mounting position in which the lower half of the cassette case is arranged, and at this mounting position, as shown in FIG. Thus, it is gripped by the mounting means 40 composed of a pair of gripping members, taken out from the plate holding means 30, and mounted on the lower half 1B of the cassette case body.

(Problems to be Solved by the Invention) However, since the above-mentioned lock plate holding means 30 holds the lock plate 10 upright in the vertical direction, the lock plate 10 is lifted by the mounting means and moved in parallel as it is. When the lower half 1B is lowered and then mounted on the lower half 1B, the protrusions 12 and 13 hit the wall surface of the lock plate mounting portion 20,
I can't wear it. Therefore, prior to mounting on the lower half 1B, the mounting means 40 attaches the lock plate 10 in the drawing so that the protrusions 12 and 13 do not come into contact with the wall surface of the lock plate mounting portion 20. It must be rotated from the position shown by the chain line to the position shown by the solid line. If the mounting means is capable of changing the inclination of the lock plate 10 as described above, the mounting means becomes complicated and large due to the rotation mechanism, and accordingly, the mounting means is supported. It is necessary to increase the rigidity of the entire unit and increase its size. Such a device would not be suitable for high-speed installation of lock plates.

The present invention has been made in view of the above problems, and an object thereof is to provide a video cassette lock plate assembling device that simplifies the structure of the mounting means and enables high-speed assembling of the lock plate. To do.

(Means and Actions for Solving the Problems) In the video cassette lock plate incorporating device of the present invention, the surface of the lock plate on which the projection of the plate body is provided faces obliquely downward, and the shaft portion described above. A plate holding means for holding the plate at a slant angle so as to extend in the horizontal direction above the plate body, and a parallel movement by holding the lock plate held by the plate holding means while keeping the tilt of the lock plate. It is characterized in that it comprises a mounting means to be mounted on the cassette case body.

That is, if the lock plate is tilted in advance while being held by the plate holding means as described above, the lock plate can be moved in parallel even if the mounting means does not rotate the lock plate. It can be smoothly attached to the cassette case body. Therefore, the mounting means only needs to have a mechanism capable of moving the lock plate in parallel, and the structure of the mounting means can be simplified. In addition, the inclination angle of the lock plate by the plate holding means is that the lock plate on the plate holding means is attached to the cassette case body with the same inclination according to the height of the protrusion of the lock plate and the like. It may be appropriately determined within the range where it is possible.

Further, the conventional plate holding means 30 described above does not particularly have means for fixing the torsion spring 15 to the position where it engages with the shaft portion 14, as shown in FIG. However, when the plate holding means 30 is transferred at a high speed, the torsion spring 15 may be inverted as shown by the alternate long and short dash line in the drawing. Therefore, the plate holding means in the assembling apparatus of the present invention is provided with spring pressing means for pressing the foot portion of the torsion spring to the surface opposite to the surface of the plate body on which the protrusion is formed. It is desirable to prevent the inversion of.

(Examples) Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a plate supporting means of a video cassette lock plate assembling apparatus according to an embodiment of the present invention. Since the structure of the lock plate itself which is incorporated in the cassette case body by the present assembling device is the same as that of the lock plate described above, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

The plate holding means 50 has an obliquely inclined plate holding surface 51, and the plate holding surface 51 is formed with two recesses 52 and 53 for receiving the two protrusions of the lock plate. Further, a pair of columns 54 and 55 are provided at positions adjacent to both sides of the plate holding surface 51, and groove portions 54a and 55a for mounting the shaft portions of the lock plates are provided on the upper surfaces of these columns.
Are formed. Further, on the plate holding surface 51, a spring pressing arm 56 and a plate pressing arm which are urged toward the plate holding surface by a spring or the like not shown.
57 are provided. These arms 56 and 57 can be rotated about the support shafts 56a and 57a by applying a pressing force, respectively, and above the arms 56 and 57,
Pressing means 58 and 59 are provided for rotating the upper ends of the arms 56 and 57 by moving them downward.

When the plate holding means 50 holds the lock plate, the pressing means 58 causes the spring pressing arm 56 to move.
The pressing means 59 presses the plate pressing arm 57, respectively, and both arms 56, 57 are rotated upward to retract from the plate holding surface 51. In such a state, the lock plate 10 is supplied onto the plate holding surface 51. The lock plate 10 faces the surface on which the above-mentioned two protrusions are formed downward, engages the protrusions 12 and 13 with the recesses 52 and 53, respectively, and causes the shaft portion 14 to move into the groove portions 54a and 55a. It is placed on and positioned on the plate holding means 50 (see FIG. 2). When the lock plate 10 is placed on the plate holding surface 51 in this manner, the pressing means 59 releases the pressing of the pre-toe pressing arm 57, and the lock plate 10 is moved to the plate holding surface.
Press it against 51 and fix its position. Then, as shown in FIG. 2, the torsion spring 15 causes the lock plate 10 to move.
When attached by engaging the coil portion 15a with the shaft portion 14, the pressing means 58 also releases the pressing force of the spring pressing arm 56. The spring retainer arm 56 has a notch 56a formed at the tip thereof for receiving the foot portion 15b of the torsion spring, and the spring retainer arm 56 receives the foot portion 15b in the notch 56a. The foot
The position of 15b is regulated from above to prevent the torsion spring 15 from rotating around the shaft portion 14. Therefore, after the lock plate 10 is placed on the plate holding surface 51 as described above, even if the plate holding means 50 is moved at a high speed to a predetermined built-in position, the torsion spring 15 has a predetermined distance. Holds correctly in the mounting position. If there is no risk of the torsion spring reversing or the plate body dropping off from the plate holding surface 51 due to a relatively slow moving speed of the plate holding means, the spring pressing arm 56 and the plate pressing member. The arm 57 does not necessarily have to be provided.

When the plate holding means 50 holding the lock plate 10 is transferred to a predetermined assembly position as described above, the spring pressing arm 56 and the plate pressing arm 57 are moved upward again by the pressing means 58 and 59. The lock plate 10 is rotated so that the lock plate 10 has a pair of gripping members.
It is gripped by 60 and taken out from the plate holding means 50 (see FIG. 6). The gripping member of the mounting means 60 on the side of the foot 15b of the torsion spring 15 has a step 61 for regulating the position of the foot 15b of the torsion spring 15, and the torsion spring 15 has this step. The lower half is pressed against the plate body 11 side by 61.
It is loaded into 1B. Since the lock plate 10 is held on the plate holding member 50 by being inclined at a predetermined angle in advance, the mounting means 60 grips the lock plate 10 and then moves the lock plate 10 back and forth, left and right, and up and down. It can be incorporated into the lower half 1B simply by moving it in parallel. It should be noted that the plate holding surface 51 of the plate holding means 50 has a posture in which the two projections 12 and 13 of the lock plate do not project forward from the shaft portion 14 on the holding surface, and the plate holding surface 51 is in that state. It is formed in advance so that it can enter into the lock plate mounting portion 20 of the lower half 1B.

As described above, in the assembling apparatus of the present invention, since the lock plate is held on the plate holding means in an inclined manner in advance, the mounting means merely grasps the lock plate and translates the lock plate in parallel to the cassette case body. Can be incorporated into the lower half. Therefore, the mounting means does not need to be provided with a mechanism for rotating the lock plate, which is conventionally required, and the mounting means can be simplified and downsized. The specific structures of the plate holding means and the mounting means used in the assembling apparatus of the present invention are not limited to those shown in the above embodiment.

(Effect of the Invention) As described above, according to the video cassette lock plate built-in device of the present invention, the structure of the lock plate mounting means can be simplified to achieve weight reduction and size reduction. It is possible to reduce the weight and size of the entire unit supporting the means. Therefore, by using such an assembling device, the assembling of the lock plate can be performed at high speed.

[Brief description of drawings]

FIG. 1 is a perspective view showing plate holding means of a video cassette lock plate assembling apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the plate holding means holding a lock plate, and FIG. 3 is a lock plate. FIG. 4 is a perspective view of the video cassette, FIG. 5 is an exploded perspective view of a main part of the video cassette, and FIGS. 6 (a), (b), FIG. 8 is a perspective view showing a conventional plate holding means together with a lock plate, and FIG. 7 is a schematic view of a conventional mounting means and a lower half for holding the lock plate. 1 …… Case, 1A …… Upper half 1B …… Lower half, 3 …… Cassette case body 6 …… Guard panel, 10 …… Lock plate 11 …… Plate body, 12,13 …… Projection 14 …… Axis Part, 15 ...... Torsion spring 20 ...... Lock plate mounting part 21, 22 ...... Hole part, 50 ...... Plate holding means 51 ...... Plate holding surface, 56 ...... Spring holding arm 57 ...... Plate holding arm 60 ...... Mounting means

Claims (2)

[Claims] 1. A plate-shaped plate for a cassette case body of a video cassette, which comprises a cassette case body containing a magnetic tape and a guard panel mounted on a magnetic tape sliding surface of the cassette case body. Body and
A protrusion that is planted in the plate body and projects in a direction substantially perpendicular to the plate body; and a shaft portion that is adjacent to the plate body and integrally formed with the plate body and that extends substantially parallel to the plate body, In a built-in device that incorporates a lock plate for locking the guard panel in a closed position, which is composed of a torsion spring formed by engaging a coil portion with the shaft portion, a surface of the plate body on which the protrusion is provided. Plate holding means for holding the lock plate at an angle so that the shaft portion extends obliquely downward and the shaft portion extends in the horizontal direction above the plate body, and the lock plate held by the plate holding means is held. And a mounting means for mounting the lock plate on the cassette case body by parallel movement while maintaining the tilt of the lock plate. Rate embedded device. 2. The plate holding means presses the foot portion of a torsion spring engaged with the shaft portion of the lock plate against the surface of the plate body opposite to the surface on which the protrusion is planted. 2. The video cassette lock plate assembling device according to claim 1, further comprising spring holding means.