JP2000048354A - Inspection device for cassette tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection device for a cassette tape capable of inspecting by holding a flange of a reel in parallel in the cassette even though the self weight of the cassette tape is heavy. SOLUTION: This inspection device 10a for the cassette tape is constituted so as to be capable of inspecting the connecting state of a splicing tape Tb by photographing it with a video camera 22 in such a manner that a pair of reels 3, 4 wound round with a magnetic tape T which is connected to a leader tape with the splicing tape Tb, is housed in the cassette 2 and the cassette tape 1 pressurized to the side of a rear plate 2B by a leaf spring mounted inside the surface plate 2A of the cassette 2 is placed on a cassette holding substrate 21 by making the top and bottom to be opposite, and a sucking flange 50 mounted on the lower end part of a take-up shaft 40 is inserted to a hole of rotary shaft 3D of the reel of the side unwound with the magnetic tape to rotate a hub 3A of the reel 3 while sucking it by the sucking flange 50, then the splicing tape being put near to the side of the reel wound round with the magnetic tape is brought to the specific position on an opening part of the cassette.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette tape inspection apparatus for inspecting the state of a magnetic tape used in a video deck, a camcorder, etc., which is wound in a cassette.

[0002]

2. Description of the Related Art First, a conventional cassette tape inspection apparatus will be described with reference to FIGS. 4A and 4B show a current cassette tape used in an 8 mm video apparatus. FIG. 4A is a perspective view showing a state before a magnetic tape is entangled, and FIG. The perspective view showing the state at the time, FIG.
FIG. 5 is a schematic side view showing the configuration of a conventional cassette tape inspection apparatus, and FIG. 6 is a diagram showing a normal state when the cassette tape shown in FIG. 4A is inspected. FIG. 7 is a sectional view showing an unfavorable state when the cassette tape shown in FIG. 4A is inspected.

In FIG. 4, reference numeral 1 indicates a current cassette tape used in an 8 mm video apparatus. In addition,
The state of the cassette tape 1 shown in FIGS. 4A and 4B is shown in an upside down state, and the upper surface in these figures actually shows the back surface of the cassette tape 1. FIG. 5C is a cross-sectional view of the normal state of the cassette tape 1 shown in FIG.

The cassette tape 1 is rotatably mounted inside a cassette 2 with a pair of reels 3 and 4 restricted in movement by an opening 5 formed in a back plate 2B of the cassette 2. When not in use, the reels 3 and 4 in this mounted state
In the center of the upper end of the hubs 3A, 4A, the inner surface of the face plate 2A and the flanges 3B,
4B, and is pressed against the inner surface of the back plate 2B and locked so that it cannot rotate (FIG. 4C).

[0005] The cassette tape 1 is structurally substantially covered with a lid 7 at a substantially front portion of the cassette 2, and is rotatably supported in the front of both side surfaces of the cassette 2 within an angular range of approximately 90 °. When the cassette tape 1 is mounted on a video deck or the like, the lid 7 is automatically opened by a mechanism on the video deck side as shown in FIGS. 4A and 4B. Reference numeral 8 indicates a reel detent claw.

The magnetic tape T is connected to the leading ends of both leader tapes Ta fixed to the hubs 3A and 4A of the reels 3 and 4 by a splicing tape Tb (in FIG. 4, connected to the hub 4A). 4A, usually, in FIG. 4A, the magnetic tape T is wound on the reel 4 side, the splicing tape Tb is moved toward the reel 4 side, and the leader tape Ta is placed on the back side of the lid 7. It is caught in a state that exists over the entire surface. When such a cassette tape 1 is mounted on a video deck or the like, as described above, the lid 7 is opened, the reel detent claw 8 is released, and the two reels 3 and 4 2 front plate 2A and back plate 2
The magnetic tape T is exposed from both inner surfaces of B so that the magnetic tape T can be smoothly pulled out to a device such as a video deck.

The cassette tape 1 as described above
In the manufacturing process, inspections are performed to see if the product conforms to various standards, and only those that pass those inspections are shipped as products. Among those inspections, the splicing tape Tb There is an inspection to see if the connection between the magnetic tape T and the leader tape Ta is performed in a good condition. If the splicing tape Tb is displaced in the width direction of the magnetic tape T, the adhesive of the splicing tape Tb adheres to the rotating magnetic head when scanning with the rotating magnetic head, causing the magnetic gap to be clogged. This is one cause of inconvenience. If the magnetic tape T is not connected linearly to the leader tape Ta, the magnetic tape T fluctuates up and down and travels, which may cause inconvenience such that video signals cannot be recorded well.

Conventionally, in order to inspect whether or not such a connection is made well, a cassette tape inspection apparatus (hereinafter simply referred to as "inspection apparatus") 10 as shown in FIG. The above-mentioned inspection has been carried out. The inspection apparatus 10 includes a cylinder 12 fixed vertically to a horizontal reference plane 11, a drive shaft 13 that moves up and down by air pressure or hydraulic pressure inside the cylinder 12, a support plate 14 fixed horizontally to the drive shaft 13. In the vicinity of the tip of the support board 14, the support board 14 is vertically penetrated and mounted.
A bearing sleeve 17 provided with a motor 16 inside the bearing sleeve 17 via a coupling 18.
, A take-up shaft 20 that is rotationally driven, a cassette holding base 21 disposed below the take-up shaft 20 in a horizontal state on the reference surface 11, and slightly above the side surface of the cassette holding base 21. And a video camera 22 disposed in the camera.

A reel engaging claw 2010 is formed on the side surface of the leading end of the winding shaft 20, and slightly above the reel 3, the reel 3 is exposed to the opening 5 on the back plate 2 B side of the cassette 2. A disc-shaped holding flange 2020 having a flat surface 2021 that presses against the flat end 3C (FIG. 4C) of the hub 3A.
Are formed.

When the inspection of the cassette tape 1 is performed using the inspection apparatus 10 having such a configuration, first, FIG.
A splicing tape Tb at the position shown in FIG.
Then, the cassette tape 1 of the leader tape Ta is placed and fixed on the cassette holding base 21 with the back plate 2B side facing upward and the lid 7 opened. The mechanism for opening the lid 7 is not directly related to the present invention, and has been omitted to simplify the description and the drawings.

Next, as shown in FIG. 6, the support plate 14 is lowered, and the leading end of the take-up shaft 20 is inserted into the shaft hole 3D of the reel 3 to the position shown by the dotted line. The flat surface 2021 slightly presses the flat end 3C (FIG. 4C) of the hub 3A of the reel 3 against the leaf spring 6, the flange 3B of the reel 3 rises from the inner surface of the back plate 2B of the cassette 2, and the reel 3 The engaging claw 2010 is engaged with a projection (not shown) formed on the inner peripheral wall of the shaft hole 3D.

Then, the motor 19 is driven to slightly rotate the winding shaft 20, and the splicing tape Tb
Slightly winds the leader tape Ta on the reel 3 from the position shown in FIG. 4A to the center position as shown in FIG. 4B. Then, the splicing tape Tb located at the center is photographed by the video camera 22, and whether or not the splicing tape Tb is stuck in the normal state as described above is determined by checking whether the magnetic tape T is in the normal state on the leader tape Ta. Inspect whether it is stuck or not.

When the inspection of the state of attachment and connection between the leader tape Ta and the magnetic tape T by the splicing tape Tb on the reel 3 side is completed, the magnetic tape T wound on the reel 4 is then moved to the reel 3 side. And the leader tape Ta and the magnetic tape T on the reel 4 side in the same manner.
Then, the state of attachment and connection with the splicing tape Tb is inspected. In this way, the inspection of the attachment and connection state of one cassette tape 1 is completed.

However, the leaf spring 6 mounts the cassette tape 1 on a device such as a video deck with the surface plate 2A side of the cassette tape 1 facing upward, and drives the drive shaft on the device side from below to the reels 3,4. When the reels 3 and 4 are fixed or rotated by the drive shafts thereof, the flat ends 3C of the hubs 3A and 4A of the reels 3 and 4 are moved by the reaction force of the leaf spring 6 to the apparatus side. Flat surface of the holding flange of the drive shaft (the holding flange 2 of the winding shaft 20)
020) to position the reels 3 and 4 in the cassette 2.

This method of positioning the reels 3 and 4 functions without any problem when the own weight of the reels 3 and 4 around which the magnetic tape T is wound can be used. However, as shown in FIG. In a device for inspecting at a high speed with the back plate 2B side up, the cassette tape 1 in which the magnetic tape T having a length capable of recording for a long time on the reel 3 and having its own weight is heavy is used. Especially the leaf spring 6
With only the reaction force described above, there is a case where the pressing force as described above is insufficient.

[0016]

Therefore, in the inspection method of the cassette tape 1 by the inspection apparatus 10, the cassette tape for long-time recording, which is the object to be inspected, is taken into consideration in consideration of the maintainability of the inspection equipment. Since it is necessary to mount the cassette 21 on the cassette holding base 21 upside down, there is a problem that the pressing force is insufficient as described above. Due to the lack of this pressing force, as shown in FIG.
The parallelism between the flange 3B of the reel 3 and the inner surfaces of the front plate 2A and the back plate 2B cannot be ensured, and the splicing tape Tb cannot be positioned at the original center position. There is a point. When the flat surface 2021 of the holding flange 2020 of the take-up shaft 20 and the flat end 3C of the hub 3A of the reel 3 are incompletely adhered, the reel detent claw 8 of the reel 3 may not come off, and the magnetic tape may not come off. There is also a problem that excessive tension is applied to T. First, the flange 3B of the reel 3 comes into contact with the inner surfaces of the front plate 2A and the back plate 2B of the cassette 2, and the inner surface is scraped off by friction to generate powder, which causes a problem that the powder adheres to the magnetic tape T.

An object of the present invention is to solve the above-described problems. Even if the cassette tape of the object to be inspected has a heavy weight, the inner surface of the front plate and the back plate of the cassette and the inner surface of the cassette are attached to the cassette tape. It is an object of the present invention to provide a cassette tape inspection apparatus capable of performing an inspection in a good state while maintaining the parallelism with the flange of the reel.

[0018]

Therefore, in the cassette tape inspection apparatus of the present invention, both ends of the magnetic tape are attached and connected to the other end of the leader tape having one end mounted on a pair of reels with a splicing tape. The reel is wound around one of the reels and housed in a cassette, and the reels are placed in the cassette by the spring mounted between the inner surface of the front plate side and the reel. The cassette tape is pressed against the inner surface on the side of the face plate, and when used, the reel is lifted up by the pressing force of the spring and rotatably supported, so that the magnetic tape is exposed to the opening of the cassette. And insert the take-up shaft with the reel engaging claw at the tip into the rotation shaft hole of the reel on which the magnetic tape is not wound. Then, the splicing tape on the side where the magnetic tape is not wound is brought to a specific position of the opening of the cassette, and the splicing tape at the specific position is photographed by a video camera, and the connection is performed. In a cassette tape inspection device for inspecting a state, an air flow path connected to an air suction source is formed at least at a lower end of the winding shaft, and a suction flange is attached to a lower end of the winding shaft. A suction surface for suctioning a side surface of the rotary shaft hole of the reel to a suction flange;
The problem is solved by forming an air flow path opened to the suction surface in the inside thereof and connecting to the air flow path on the winding shaft side.

Therefore, according to the cassette tape inspection apparatus of the present invention, even if the cassette tape of the object to be inspected has a heavy weight, the inner surfaces of the front and rear plates of the cassette and the flanges of the reels mounted on the front and rear plates of the cassette are not required. While maintaining the parallelism of
The reel can be rotated or fixed, and the adhesion and connection of the splicing tape can be inspected in a good condition.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cassette tape inspection apparatus according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic side view showing a configuration of a cassette tape inspection device according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a leading end portion of a winding shaft of the cassette tape inspection device shown in FIG. FIG. 3 is a partial sectional view showing a state in which the leading end of the take-up shaft shown in FIG. 2 is inserted into a rotary shaft hole of a reel of a cassette tape. The same components as those of the conventional cassette tape inspection apparatus are denoted by the same reference numerals and will be described.

First, the configuration of a cassette tape inspection apparatus according to an embodiment of the present invention will be described with reference to FIG. This inspection apparatus 10A for a cassette tape also has a horizontal reference surface 11 like the inspection apparatus 10 for a cassette tape of the prior art.
, A drive shaft 13 that moves up and down by air pressure or hydraulic pressure inside the cylinder,
3, a bearing sleeve 30 mounted vertically through the support board 14 near the tip of the support board 14, and a coupling 18 inside the bearing sleeve 30. A take-up shaft 40 that is connected to the motor 19 via a rotary drive, a cassette holding base 21 disposed horizontally below the winding shaft 40 on the reference surface 11, and a cassette holding base 21. And a video camera 22 disposed slightly above the side surface.

As shown in FIG. 2, the bearing sleeve 30 has bearings 31 and 32 mounted on both ends thereof, and is located just above the lower bearing 32 and directly below the support plate 14. Is formed with an air flow path 33 connected to an air suction source (not shown) via a connector 34.

The winding shaft 40 is inserted into the bearing sleeve 30 and is rotatably supported by the bearings 31 and 32. The upper end of the winding shaft 40 is connected to the coupling 18 as described above. Is connected to the motor 19 via the. On the other hand, a suction flange 50 having a circular cross section is attached to a lower end portion of the winding shaft 40. This suction flange 50 is located
A column 51 having a small diameter is formed so that it can be inserted into the rotary shaft holes 3D and 4D of the reels 3 and 4, and when the cylindrical column 51 is inserted into the rotary shaft holes 3D and 4D, it rotates on its outer peripheral surface. A reel engaging claw 52 having a structure similar to that of the conventional reel engaging claw 2010 that can engage with the shaft holes 3D and 4D is formed. Then, slightly above the reel engaging claw 52, the hub 3A of the reel 3, 4 having a diameter substantially equal to the diameter of the end face of the hub 3A, 4A of the reel 3, 4
4A is provided with a suction surface 53 for sucking the end face, and an air flow path 54 opened to the suction surface 53 is formed therein. The air passage 54 is connected to the air passage 33 on the winding shaft 40 side.

Using the inspection apparatus 10A having such a structure and configuration, the splicing tape T of the cassette tape 1 is used.
When inspecting the state of attachment and connection of b, as in the case of the prior art, first, the splicing tape Tb and the cassette tape 1 of the leader tape Ta at the positions shown in FIG. With the face plate 2B facing upward and with the lid 7 opened, it is placed and fixed on the cassette holding base 21, and then the support plate 14 is lowered, and as shown in FIG. The suction surface 53 is the hub 3 of the reel 3
Insert the tip of the suction flange 50 into the shaft hole 3D of the reel 3 until it comes into contact with the flat end 3C of the reel A.
2, a projection (not shown) formed on the inner peripheral wall of the shaft hole 3D
To be engaged. Then, an air suction source, for example, a suction pump is operated to make the inside of the air passages 33 and 54 negative pressure, to suck the flat end 3C of the hub 3A of the reel 3, and to pull the reel 3 to a predetermined position in the cassette 2. At the height position, the flanges 3B, 4B of the reels 3, 4 are attached to the face plate 2A of the cassette 2.
And is held parallel to the inner surface with the back plate 2B.

Usually, the reels 3, 4 are pushed up from the inner surface of the front plate 2A of the cassette 2 by the pressing force of the leaf spring 6, but tend to sink due to the gravity of the wound long-time magnetic tape T, and As described above, it is no longer held at a predetermined height position in 2. Therefore, applying a negative pressure to the suction flange 50 assists the pressing force by which the flat end portion 3C of the hub 3A is suctioned by the suction force, the reel 3 is pulled up, and the leaf spring 6 pushes the reel 3 up. . In this manner, the reel 3 is placed at the predetermined height position in the cassette 2 and the flanges 3B and 4B of the reels 3 and 4 are placed on the front plate 2A and the surface plate 2A of the cassette 2 with the help of the suction force of the suction flange 50 as described above. It can be reliably held parallel to the inner surface with the back plate 2B.

Then, the motor 19 is driven to rotate the take-up shaft 20, so that the splicing tape Tb moves from the position shown in FIG. 4A to the central position shown in FIG. Wind the tape Ta slightly. In this manner, the splicing tape Tb can be positioned at the regular center, and when the splicing tape Tb is photographed by the video camera 22, whether the splicing tape Tb is stuck and connected in a regular state, It is possible to inspect whether or not the magnetic tape T is stuck and connected to the leader tape Ta in a regular state.

When the attachment of the leader tape Ta and the magnetic tape T by the splicing tape Tb on the reel 3 side and the inspection of the connection state are completed, the magnetic tape T wound on the reel 4 is then moved to the reel 3 side. And the leader tape Ta and the magnetic tape T on the reel 4 side in the same manner.
Then, the state of attachment and connection with the splicing tape Tb is inspected. In this way, the inspection of the attachment and connection state of one cassette tape 1 is completed.

In the above embodiment, an 8 mm video cassette tape has been described as the cassette tape 1. However, it should be added that the present invention is not limited to the 8 mm video cassette tape.

[0029]

As is clear from the above description, according to the inspection apparatus (for cassette tape) of the embodiment of the present invention,
By providing the suction flange, it is possible to securely hold the reel at a predetermined height position in the cassette and the flange of the reel in parallel with the inner surfaces of the front plate and the back plate of the cassette with the help of the suction force. So, 1. 1. Since the flange of the reel does not contact the inner surface of the cassette, there is no generation of shavings due to friction generated in the inspection apparatus of the related art. 2. Since there is no generation of the above-mentioned shavings, it is possible to prevent the occurrence of poor quality of the cassette tape such as dropout. 3. The reel detent pawls can be accurately released, so that adverse effects such as applying excessive tension to the magnetic tape do not occur. 4. By introducing the inspection device of the present invention, other inspection devices having a complicated mechanism can be arranged above the cassette tape similarly to the present inspection device, thereby improving maintainability. Therefore, a number of excellent effects can be obtained, such as an improvement in the operation rate of the entire inspection apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a configuration of a cassette tape inspection device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a configuration of a leading end of a winding shaft of the cassette tape inspection device shown in FIG.

FIG. 3 is a partial cross-sectional view showing a state where the leading end of the take-up shaft shown in FIG. 2 is inserted into a rotary shaft hole of a reel of a cassette tape.

FIG. 4 shows a current cassette tape used in an 8 mm video apparatus, FIG. 4A is a perspective view showing a state before inspection in which a magnetic tape is entangled, and FIG. FIG. 9 is a perspective view showing a state at the time of inspection, and FIG. 10C is a schematic partial cross-sectional view taken along line AA in FIG.

FIG. 5 is a schematic side view showing a configuration of a conventional cassette tape inspection apparatus.

6 is a cross-sectional view showing a normal state of the cassette tape shown in FIG. 4A at the time of inspection.

FIG. 7 is a sectional view showing an unfavorable state at the time of inspection of the cassette tape shown in FIG. 4A.

[Explanation of symbols]

1: cassette tape, 2: cassette, 2A: cassette 2
Front plate, 2B ... back plate of cassette 2, 3, 4 ... reel, 3A, 4A ... hub, 3B, 4B ... flange, 3C,
4C: Flat ends of hubs 3A, 4A, 3D, 4D: Rotating shaft hole, 5: Opening, 6: Leaf spring, 7: Lid, 8: Reel detent pawl, 10A: Inspection for cassette tape of the embodiment of the present invention Apparatus, 11 reference plane, 12 cylinder, 13 drive shaft, 14 support board, 19 motor, 21 cassette holding base, 22 video camera, 30 bearing sleeve,
33, 54: air flow path, 34: connecting device, 40: winding shaft, 50: suction flange, 51: cylinder, 52: reel engaging claw, 53: suction surface, T: magnetic tape, Ta: leader tape, Tb: Splicing tape

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Katsuyoshi Takeyama 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 2F065 AA15 AA16 BB13 BB15 BB24 CC02 DD13 FF04 JJ03 JJ26 2G051 AA90 AB20 CA04 DA06 5D112 AA22 JJ01

Claims (1)

[Claims] An end of a magnetic tape is attached and connected with a splicing tape to the other end of a leader tape having one end mounted on a pair of reels, wound around one of the reels, and housed in a cassette. The reels are pressed against the inner surface on the back plate side of the cassette by a spring mounted between the reel and the inner surface on the front plate side of the reel in the cassette. , The reel is lifted and rotatably supported,
The cassette tape, which is configured so that the magnetic tape is exposed at the opening of the cassette, is held upside down, and the reel engaging claw has a leading end in the rotation shaft hole of the reel on which the magnetic tape is not wound. Insert and rotate the take-up shaft formed in the section, bring the splicing tape on the side where the magnetic tape is not wound to a specific position of the opening of the cassette, and move to the specific position. In a cassette tape inspection device for photographing an existing splicing tape with a video camera and inspecting a connection state thereof, the winding shaft has at least a lower end portion formed with an air flow path connected to an air suction source. A suction flange is attached to a lower end portion of the winding shaft, and the suction flange has a suction surface that suctions a side surface of a rotation shaft hole of the reel, and a suction surface is provided therein. Wherein optionally open air flow path is formed on the suction surface, the inspection apparatus for a cassette tape, characterized in that connected to the air passage of the winding shaft-side in.