JPS5972258A - Data input and output device - Google Patents

Abstract

PURPOSE:To speed up stopping operation and to reduce power consumption by increasing attracting force in the initial stage wherein an armature is attracted and reducing electric power supply after the attraction. CONSTITUTION:When a switching element 21b turns on, the changing of a capacitor CT through a resistance RT starts, but the terminal voltage of the capacitor CT is low, so a switching element 23a is still off. Therefore, a rectangular wave close to a wide-width direct current is outputted from the output terminal of a comparator 21c. This is turned on and off to apply a voltge to a brake magnet 17, and the armature is attracted speedily to press a paper tape aginst a brake shoe, stopping the run immediately. The switching element 23a turns on after a specific time determined by the resistance RT and capacitor CT, and the power supply to a manget 17 is reduced to decrease the attracting force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable data input/output device that is separated from the main body of a numerical control device.

In numerical control, a host computer is sometimes used to perform various data processing to create machining command data for a workpiece. Data created by the host computer is recorded on paper tape by a tape puncher, and this paper tape is used as a recording medium as input information for other systems. Additionally, when creating a paper tape, a printer is used to print out the contents in order to record the contents. Normally, when output from a host computer is recorded on paper tape or printed on recording paper, a paper tape puncher and a printer are used, which are provided separately from the main body of the host computer. These devices are connected to a computer (host) and operate only according to instructions from this computer.

Unlike such a system in which each peripheral device is separate, when connected to a host computer, it operates based on its commands, and when disconnected from the host computer, it independently reads and copies the contents of the paper tape. A system for printing may also be considered. However, such systems are intended for a very limited number of systems and may not be applicable to other systems, and even if they can be applied, it may be necessary to change the host computer software. There was also the inconvenience of having to do so. Further, a tape reader used in a numerical control device reads processing command information recorded on a paper tape one block or several printers at a time. For this reason, the tape reader includes a device for feeding the paper tape, a device for stopping the paper tape, a device for reading processing command information recorded on the paper tape, and the like. Among these devices, the device that stops the paper tape uses the suction force of a magnet to press the paper tape against the brake shoe using a brake roller to stop the paper tape. Since a voltage is applied throughout the process, a large amount of electric power is required and a lot of heat is generated. Furthermore, when the armature is attracted to the magnet I, there is a considerable air gap between them, so it takes time for the armature to be completely attracted, and the stopping operation of the paper tape may be delayed.

The present invention aims to solve the above-mentioned conventional drawbacks, and its purpose is to speed up the paper tape stopping operation as much as possible in a recording medium stopping mechanism in a numerical control device, and to It is an object of the present invention to provide a new device which ensures the above-mentioned operation and further reduces the power consumption of the magnet as much as possible when the paper tape is stopped.

Next, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 is a block diagram of a data input/output device according to the present invention. In the figure, ■ is a control device, 2 is a read-only memory (hereinafter abbreviated as ROM) that stores the programs necessary for the operation of the data input/output device, and 3 is a temporary storage for data read out from paper tape, etc. A random access memory (hereinafter abbreviated as RAM) to be stored, 4 a tape reader, 5 a tape puncher, 6 a printer, the data read by the tape reader 4 and the data punched out by the tape puncher 5 are Prints data that is currently available or data that is sent from the host computer. Reference numeral 7 denotes a control panel, which has character keys, a numeric keypad, function keys, and the like. Particularly, it has an operation changeover switch that allows the data input/output device according to the present invention to operate according to commands from the host computer or independently. Reference numeral 8 represents an interface circuit between the host l and the computer, and 9 represents a switching circuit.

The device δ shown in FIG. 1 can perform the following operations only within its own device. First, data keyed in from the operation panel 7 can be immediately printed out using a printer, and this data can also be stored in the RAM 3. It is also possible to correct errors in the data stored in the RAM 3 after checking the printed results. After this correction operation, the data stored in the RAM 3 can be printed out and the paper tape can also be punched. Furthermore, the data read from the tape reader 4 can be printed out from the printer 6, the paper tape can be punched by the tape puncher 5 to make a copy of the paper tape, and these operations can be performed simultaneously. can.

In addition, the device shown in FIG. 1 switches the operation changeover switch provided on the operation panel 7, turns on the function circuit 9, connects to the host computer side, and connects the RAM 3 from the operation panel 7 or Qi/leader 4. The data can be transferred to the host computer side with or without going through it, and the data transferred from the host computer side can also be recorded on a paper tape from the tape puncher 5, and the data can be recorded on a paper tape from the printer 6. You can also print it out.

FIG. 2 is a block diagram showing the main parts of a tape reader used in a numerical control device, and in the figure, 10 is a paper tape. This paper tape 10 records processing command information for the workpiece, but the details will be omitted. Reference numeral 11 denotes a capstan roller, which is constantly rotated by a drive motor (not shown). 12 is a feed roller;
It is rotatably pivotally connected by a pin 12a. 13 is a feed magnet, and 14 is an armature, which rotate integrally around the feed roller 12 and the bin 12a. Note that the feed roller 1 is not shown in the figure.
2 is always biased by a spring in the direction RJ+ from the capstan roller 11. 15 is a brake shoe, which is fixed to the base plate of the tape league.

16 is a brake roller, which is rotatably pivoted 7'1 by a pin 16a. 17 is the brake magnet,
An armature 18 rotates integrally around the brake roller 16 and pin 16a. 19 is a league for reading the processing command information recorded on the paper tape IO, LS is its light emitting part, and DR is its reading part. In addition,
Gl and 02 are paper tape guides. 21 is a magnet drive circuit that drives the brake magnet 18.

FIG. 3 is a circuit diagram illustrating details of the magnet drive circuit 21. 21a is a switching transistor;
It is connected in series with the brake magnet 17. R1
is a protection resistor of the switching transistor 21a. 21b is a switching element for turning on and off the input signal to the switching transistor 21a, 21c is a comparator, 21d is a triangular wave generation circuit, 21e is a flip-flop circuit, 21f is an OR circuit, 21g is an inverter, and 623 is an inverter. It is a subsidy circuit. The suction assisting circuit 23 includes resistors R2, R3, R4, R5, a resistor RT for a time constant circuit of a switching element 23a1 that short-circuits the resistor R4, and a capacitor CT. This switching element 23a is a switching element with a positive turn-on voltage.

Next, the operation of the present invention will be explained.

When operating the tape league or reading processing command information from the paper tape, the Cera I signal,
Or the read signal passes through the OR circuit 21f and flips 2.
It is applied to the set terminal S of the 0-tube circuit 21e, and the flip flop circuit is set. Therefore, the switching element 21b is turned off, and the switching transistors 2 and 1a are turned off. Therefore, the brake magnet F is released and the paper tape 10 can move freely. At the same time, a voltage is applied to the feed magnet 13 and the armature 14 is attracted, so that the foot roller 12 presses the paper tape 10 against the carburetor roller 11, and the paper tape 10 moves in the direction of the arrow in FIG.

At this time 1, the reader 19 reads the processing command information recorded on the paper tape 10. When one block or several blocks of machining command information is read, a stop signal passes through the inverter 29g, and the flip-flop circuit 21e
is applied to the reset terminal R of. For this reason, the clip
Since the output terminal Q of the flop circuit 21e becomes high level, the switching element 21b is turned on. On the other hand, the capacitor CT begins to be charged through the resistor RT, but since the terminal voltage of the capacitor CT is low, the switching element 23a remains off. Therefore, a high level voltage is applied to the positive terminal of the comparator 21c. Further, a triangular wave as shown in FIG. 4 (a) is applied from the diagonal wave generator 21d to the negative terminal of the comparator 21c. Therefore, from the output terminal of the comparator 21c, a rectangular wave having a width of 1] and almost a direct current as shown in 41R+(b) is output. This rectangular wave is applied to the base of the switching transistor 21a through the switching element 21b, so it is turned on and off, a voltage is applied to the brake magnet 17, the armature 18 is rapidly attracted, and the paper tape 1 is The vehicle is pushed by the brake shoe 15 and immediately stops running.

After a certain period of time determined by the resistor RT and the capacitor CT has elapsed and the voltage across the capacitor CT exceeds the turn-on voltage of the switching element 23, the switching element 23a is turned on and the resistor R4 is short-circuited. Therefore, the voltage applied to the positive terminal of comparator 21'C drops to a low level LL as shown in FIG. Therefore, from the output terminal of the comparator 21c, the fourth
A narrow rectangular wave as shown in V (c) is output.

Therefore, the power supplied to the brake magnet J7 is reduced, and the attraction force is also reduced. However, armature 18
has already been attracted by the brake magnet (brake magnet) 17, so even if the attraction force decreases, the brake magnet! - The paper tape 10 does not move away from the paper tape 17 and maintains its state even when it is stopped. Thereafter, when reading the processing command information from the paper tape 10 again, the read signal is applied to the set terminal S of the second rip-flop circuit 21e as described above, and the above-described operation is repeated. FIG. 5 is a waveform diagram showing how signals change in each part over time.

Note that the magnet drive circuit 21 includes a switching transistor 21a in addition to having the configuration as in the above embodiment.
It goes without saying that any circuit configuration may be used as long as it can apply a rectangular wave similar to that of the above embodiment at the pace of .

Furthermore, the present invention is applicable not only to paper tape leagues but also to other tape leagues such as magnetic tape.

As explained in detail above, the present invention not only allows the data input/output device to operate in response to commands from the host computer to create paper tapes, print out transferred data, and input data, but also includes It is suitable as a portable data input/output device that can hold several numerical control devices because it has a processing function that allows you to create paper tapes with your own programming and print data on paper tapes. It is something. Furthermore, the magnet drive circuit that drives the tape league's brake magnet is equipped with a suction assist circuit that strengthens the suction force at the initial stage of suctioning the armature, making it possible to rapidly press it against the brake shoe when the recording medium stops. The magnetic medium can be stopped reliably and quickly. In addition, after pressing, the pressing force is weakened and the amount of power supplied to the brake magnet is suppressed, which has many effects such as suppressing heat generation from the brake magnet and saving energy. It is.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a data input/output device according to the present invention, FIG. 2 is a block diagram showing the main parts of a tape league used in a numerical control device, and FIG. 3 shows details of the magnet drive circuit 21. FIG. 4 is a waveform diagram showing the process of creating a rectangular wave applied to the base of a switching transistor, and FIG. 5 is a waveform diagram showing changes in signals at various parts over time. 1st Sergeant/Chief Control Device 2...ROM3...Member RAM
4＠・Table reader 5・Tape puncher 6・Printer 7Φ・Number operation panel 10・Paper tape 15・Brake shoe 16−−Brake roller 17・Brake magnet 18・Armature 21・・Magnet drive circuit 23...Suction subsidy circuit applicant Fanuc Co., Ltd. agent Patent attorney Minoru Tsuji (JA2ri) 324

Claims (1)

[Claims] It is a data input/output device of a numerical control device equipped with a tape puncher, a tape reader, and a printer, and can also be operated by external commands, and is used at the initial stage when the armature is attracted to the magnet drive circuit that drives the brake magnet of the tape league. A data input/output device characterized by being provided with a suction assistance circuit for increasing the suction force, and further provided with a circuit for reducing the power supplied to the magnet after the armature is once suctioned.