JPH0636553Y2 - Tape end detection sensitivity adjustment device in cassette winder for recorded tape - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The cassette winder for prerecorded tape of the present invention stacks a large number of tape cassettes around which only a leader tape is wound, while the recorded contents are recorded many times. The pancake of the recorded tape that is repeatedly recorded and wound around the center bobbin is attached to the rotating shaft.

Then, take out one tape cassette, join the first part of the recording part of the recorded tape to the leader tape, wind the tape for one recording into the tape cassette, and then cut the recorded tape, The end portion is joined to the other leader tape, and the winding of the tape cassette of one recorded tape is completed.

By repeating this operation, it is possible to automatically wind the recorded tape on a large number of tape cassettes.

The present invention relates to a tape end detection sensitivity adjusting device that adjusts the sensitivity of a detection device that detects the end of the recording portion of the pancake of the recorded tape in such a cassette winder for the recorded tape.

[Conventional technology]

In this type of conventional tape cassette winder for recorded tape, in order to detect the tape end of the recorded tape, when setting the pancake of the recorded tape on the rotating shaft, the number of repetitions is taken up. Set it on the machine.

Then, every time one recorded tape is wound around one tape cassette, this set number is subtracted, and when it becomes 0, the operation is stopped.

[Problems to be solved by the device]

However, the number of repetitions of recording on the pancake of one roll of recorded tape varies depending on the length of the recorded content.

Therefore, in the above-mentioned conventional tape end detection device, the number of times of feeding out has to be set every time the pancake of the recorded tape is set.

Therefore, it takes time and effort to set it, and the recorded tape is wasted by mistakenly setting the number of times,
There is a defect that the winding machine does not stop and other problems occur.

[Means for Solving the Problems]

The present invention solves the above-mentioned problems of the tape end detection in the conventional tape cassette winder for prerecorded tape, detects the tape end by the diameter of the pancake of the recorded tape, and impresses the sensor amplifier. By adjustment,
It tries to stop the cassette winder of the recorded tape surely at the recorded end, and the means is that the recorded contents are repeatedly recorded many times, and the recorded tape is wound around the center bobbin. A rotary shaft that rotatably supports the pancake on the tape, and a sensor that includes a sender and a receiver that are installed tangentially to the outer diameter of the unrecorded leader portion that is wound near the end of the pancake. , A jig for sensitivity adjustment that can be mounted on the rotary shaft and has a small diameter portion having the same radius as the radius of the leader portion of the pancake and a large diameter portion larger than that, and the output of the light receiver On the other hand, a cassette tape winder for recorded tape, which is provided with a sensor amplifier for issuing a command to stop the operation of the cassette winder for recorded tape and an adjusting means for adjusting the output level of the light receiver for issuing a command for stopping the sensor amplifier. Oke Made by the tape end detection sensitivity adjustment device.

[Action]

The tape end detection sensitivity adjusting device of the cassette winder for the recorded tape of the present invention is such that the recorded portion of the pancake of the recorded tape is wound on many tape cassettes, and when the unrecorded leader portion approaches, the projector And the light receiver detects that the diameter is approaching, but the sensor amplifier issues a stop command to the cassette tape winder for the recorded tape. The output level of the light receiver is adjusted by the adjusting means and the command is issued. The timing is made constant.

[Example of device]

 Next, an example of implementation of the present invention will be described with reference to the drawings.

In FIG. 1 and FIG. 2, 1 is a pancake in which a recorded tape in which recorded content is repeatedly recorded and a signal is recorded at each repetition is a center bobbin and the center bobbin rotates. It is attached to the shaft 2.

Reference numeral 3 denotes a tape cassette, on which a leader tape is wound over the feed reel and the take-up reel, and is stacked so that one leader tape is sequentially drawn out from the lower end.

In this tape cassette, the lowermost tape cassette 3 stacked as described above is sent to the winding device 4.

Then, the leader tape is pulled out from the tape cassette 3, the leader tape is cut at its center, the first portion of the recorded tape is pulled out from the pancake 1, and the cut end portion of the leader tape is joined.

Then, the reel of the tape cassette 3 is rotated and the recorded tape is taken up on this reel. When a signal for each repetition is detected by the reproducing head or the like,
Reel winding is stopped.

Next, the recorded tape is cut, the end on the tape cassette side and the cut end on the sending side of the leader tape are joined, the remainder of the leader tape is wound on the take-up reel, and recorded on the tape cassette. One operation of winding the completed tape is completed.

The cassette tape winder for prerecorded tape used in the present invention (hereinafter, simply referred to as a winder) has such a configuration and operation.

The pancake 1 has a non-recording fixed length leader portion wound on the sensor bobbin side.

A pair of sensors consisting of a light emitter 5 and a light receiver 6 are movably mounted on the left and right sides of the rotary shaft 2 so as to be movable in the vertical direction, and the light beam emitted from the light emitter 5 is received by the light receiver 6, but in between. If the light beam is interrupted midway, the light beam does not reach the light receiver 6, so that the output of the light receiver 6 is lost.

The light projector 5 and the light receiver 6 can be moved up and down, can be fixed at arbitrary positions by screws 7 and the like, and a scale 8 is attached between the light projector 5 and the light receiver 6.

If the scale 8 is moved up and down together with the light projector 5 and the light receiver 6 to match the outer diameter of the leader portion of the pancake 1, the light projector 5 and the light receiver 6 are set according to the outer diameter of the leader portion of the pancake 1. The screw 7 should be fixed at that position.

Therefore, the setting is extremely simple and can be set to a reliable position.

However, in the pair of sensors formed by the light projector 5 and the light receiver 6, the output of the light receiver 6 is different for each sensor due to variations in the light projection amount of the light projector 5, variations in the sensitivity of the light receiver 6, and the like.

Further, even when the recording portion of the pancake 1 is finished and only the leader portion is left, a part of the light beam from the light projector 5 is blocked, so that the amount of light received by the light receiver 6 decreases, but does not become zero.

Therefore, it is necessary to adjust the sensitivity of this sensor according to the output of the light receiver 6.

Therefore, the adjustment jig 9 as shown in FIGS. 3 and 4 is attached to the rotary shaft 2.

This jig 9 has a small diameter portion 9a having the same outer diameter as the leader portion of the pancake 1 as shown in the figure, and a large diameter portion having a larger diameter than that.
9b and 9b are formed for each semicircle.

Then, the sensor amplifier 10 in FIG. 5 which stops the operation of the winder by the output of the light receiver 6 is turned on when the volume 10a for sensitivity adjustment and the operation of the winder are enabled, and the operation is stopped. There is provided a lamp 10b which is turned off when it is turned on.

When the jig 9 is rotated and the large diameter portion 9b is located between the light emitter 5 and the light receiver 6 as shown in FIG. 3, the lamp 10b is turned on and the small diameter portion 9a is turned on as shown in FIG. The volume 10a is adjusted so that the lamp 10b is turned off when it is in that position.

Therefore, while the recorded tape is being wound on the tape cassette 3 by the pancake 1, the lamp 10b is turned off immediately before the outer diameter of the leader portion is reached, and an instruction is issued to stop the operation of the winder.

However, this instruction alone does not stop the winder, but the next repeat signal is received and the winder stops its operation when the winding operation to the tape cassette is completed.

Then, if necessary, a lamp is separately turned on or a buzzer is sounded to inform that the operation of the winding machine is completed.

[Effect of device]

As described above, the present invention proposes that a pancake of recorded tape is wound around a large number of tape cassettes, and the outer diameter of the pancake approaches the outer diameter of the unrecorded leader portion following the end of the recording portion. Is detected by the light receiver, and the sensor amplifier issues an operation stop command to the winder.

The output level of the light receiver that issues the command is adjusted by the adjusting means by the large diameter portion of the jig and the small diameter portion that is the same as the diameter of the leader portion, so that the adjustment can be easily performed without requiring skill. it can.

In this adjustment, since the small-diameter portion has the same diameter as the leader portion, the sensor amplifier issues a stop command to the winder, so that the unrecorded leader portion is not wound into the tape cassette.

Further, since the winding machine stops its operation only by receiving the signal for each repetition after receiving the stop command, the winding machine does not stop while the tape cassette is winding the recording portion. It has an effect.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a front view of a winder, FIG. 2 is a plan view of the same as above, and FIG. The figure shows a state in which the above jig is rotated 180 degrees, and FIG. 5 is a front view of the sensor amplifier. 1 ... Pancake, 2 ... Rotation axis, 3 ... Tape cassette, 4 ... Winding device, 5 ... Emitter, 6 ... Receiver,
7 ... screw, 8 ... scale, 9 ... jig, 9a ... small diameter part, 9b ... large diameter part, 10 ... sensor amplifier, 10a ... volume, 10b ... lamp.

Claims (1)

[Scope of utility model registration request] 1. A rotating shaft for rotatably supporting a pancake of a recorded tape wound around a center bobbin, in which recorded contents are repeatedly recorded, and wound around the end of the pancake. A sensor consisting of a light emitter and a light receiver installed tangentially to the outer diameter of the unrecorded leader portion, and a small diameter portion that can be mounted on the rotating shaft and has the same radius as the radius of the leader portion of the pancake, A jig for sensitivity adjustment that is provided with a larger diameter portion, a sensor amplifier that issues a command to stop the operation of the cassette winder for recorded tape to the output of the light receiver, and a stop of the sensor amplifier. A tape end detection sensitivity adjusting device in a cassette winder for a recorded tape, comprising an adjusting means for adjusting an output level of a light receiver which issues a command.