JPH0420637Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" Field of office equipment mainly such as drafting machines and line drawing machines "Prior art" The applicant has already described As disclosed, in the conventional technology, a desired amount of movement is preset in advance, and when the operator manually moves the liner or scale, a brake device is automatically activated to move the liner or scale to the preset position. There is known a device that stops at a certain point, eliminating the need for scale reading and positioning.

"Problems to be Solved by the Invention" In the conventional technology, when the operator moves the moving object by operating the head, if the moving speed is high,
Even if the electromagnetic brake is activated automatically, there is a risk that there will be a delay in the actual stopping, so the operator should check the display on the comparison display and slow down the moving speed of the moving object when it approaches the preset position. The need arose. However, in conventional devices, when comparing the preset amount of movement of the moving object and the actually detected movement amount, the comparison display section displays the information until the compared movement amounts match. In this case, it is necessary to read and visually recognize the change in the numerical value on the comparison display section, and then slow down the movement speed before the change in value matches the comparison display section, which poses a problem that requires considerable concentration to read the comparison display section.

"Means for Solving the Problems" Therefore, the present invention provides a movable body that movably guides a liner, a scale, etc. along a guide rail,
a preset input section for inputting in advance the amount of movement of the moving object along the guide rail; a movement amount detection section for detecting the amount of movement of the moving object along the guide rail; A comparison display section that compares the amount of movement preset input to the preset input section and displays the difference; and an electromagnetic brake device that is activated by a match signal from the comparison display section to stop the moving object relative to the guide rail. In the preset brake device, the comparison display section has a display stop function that stops the display when the difference in the movement amount reaches a near-zero value smaller than a predetermined amount, and the electromagnetic brake device has a It is an object of the present invention to provide a preset brake device for a line drawing machine, a drafting machine, etc., which is characterized by having a configuration in which the brake is activated in response to a coincidence signal after a stop.

"Operation" The above-described device of the present invention compares the amount of movement of the moving body entered in the preset and the amount of movement actually detected in the comparison display section, and stops the comparison display when the difference becomes less than a predetermined amount. However, without reading the change in the numerical value on the comparison display section, the operator can visually confirm that the display has stopped, thereby knowing that the moving object has approached the preset position, and can slow down the moving speed of the moving object. The electromagnetic brake is activated by the match signal after the display stops, eliminating the delay in stopping the moving object, allowing the operator to recognize the stop of the display on the comparison display as a match signal, and ensuring that the moving object is at the preset position. There are effects that can be stopped.

``Example'' In FIG. 1, numeral 1 indicates a key that serves as a preset input unit installed on a moving body of a drafting machine, etc. When a desired dimension is input, a key is sent to a central processing unit (CPU) 3 via a key input circuit 2. and is displayed on the display unit (LCD) 5 via the display driver 4.
Also, this preset input value is stored in the memory (RAM).
is memorized. 7 is an X encoder provided between the X guide rail and the X moving body that moves along it; 8 is a Y encoder similarly provided between the Y guide rail and the Y moving body; This constitutes a movement amount detection section that detects the actual movement amount of the object.
The detection signals of the X encoder 7 and Y encoder 8 are sent to Schmitt circuits 9 and 12, and the direction selection circuit 1, respectively.
Up-down counter 11, 14 after 0, 13
is counted and input to the central processing unit 3. The central processing unit 3 has an up/down counter 1
The count values from 1 and 14 are subtracted from the preset input value in the storage section 6, and the subtracted value is sent to the display section 5 via the display driver 4. Therefore, the display section 5 constitutes a comparison display section that displays the difference between the preset amount of movement and the actual amount of movement detected by the movement amount detection section. Further, when the numerical value on the comparison display section 5 reaches a predetermined value close to zero, the central processing unit 3 stops displaying on the display section 5, and sends the X solenoid 17 through the X solenoid drive circuit 15 or the Y solenoid drive circuit 16. Alternatively, the Y solenoid 18 is ready to be driven, and when the comparison value is zero, the electromagnetic brake device provided between the guide rail and the moving body is configured to operate without delay. 19
is a warning buzzer that is activated in the event that the electromagnetic brake system is delayed and goes too far.

The structure and operation of the present invention will be explained in more detail with reference to the flowchart of FIG. 2. Numeral 20 is a preset brake mode key provided on the keyboard along with preset input key 1, etc., and when this is selected, a preset input is made to key 1. When (step 21) is performed, the amount of movement is input to the display section 5 as described above. Next, the actual amount of movement of the moving object is counted and read (step by step) via an encoder, up/down counter, etc.
22) is performed, and the count value is subtracted from the preset value in the comparison display section 5 (step 23).
If you go too far at this time, buzzer 19 will sound. When the value of the subtraction (step 23) becomes close to zero, the near zero selection (step 24) selects YES,
Brake preparation (step 25) is entered, and since the subtracted value is not zero, NO is immediately selected, the display is cleared (step 26), and the surface of surface section 5 disappears.
Next, when the subtracted value becomes zero, YES is selected in the brake selection (step 25), the brake is turned on (step 27), and the electromagnetic brake device is activated. After the brake is applied, the brake is held (WAIT) (step 28), the actual travel distance is read in count from the detection unit (step 29), and compared with the preset value (step 30).
If the comparison value is zero in zero selection (step 31)
If YES is selected and the movement operation is completed and the other instruction keys (step 36) are followed, and if the comparison value is not zero during zero selection (step 31), it means that the brake has malfunctioned and NO is selected. The selected brake is turned off (step 32) and the process returns to reading the count (step 22). on the other hand,
If the subtracted value is far from zero in the near-zero selection (step 24), NO is selected and a key read (step 33) that transmits another command is entered. If another instruction key is pressed by key selection (step 34),
YES is selected and other instruction keys (step 35)
Follow the instructions. If no other instruction key is pressed
NO is selected and the count value is displayed (step 36)
Then, the process returns to the count reading (step 22).

"Effects" As described above, according to the present invention, there is a movable body that movably guides a liner, scale, etc. along a guide rail, and a preset input that inputs in advance the amount of movement of the movable body along the guide rail. a movement amount detection section that detects the movement amount of the moving object along the guide rail;
a comparison display section that compares the amount of movement detected by the movement amount detection section with the amount of movement preset input into the preset input section and displays the difference; A preset brake device comprising an electromagnetic brake device for stopping the guide rail, wherein the comparison display section has a display stop function that stops the display when the difference in the amount of movement reaches a near-zero value smaller than a predetermined amount; Since the electromagnetic brake device is configured to operate the brake in response to a coincidence signal after the comparison display section stops displaying, an operator such as a draftsman can read the rapidly changing numerical values on the comparison display section. By visually checking that the display has stopped, you can know that the moving object is approaching the desired preset position, and you can slow down the moving speed of the moving object. This operation has the effect of eliminating the delay in stopping the moving object, allowing the operator to recognize the stoppage of the display on the comparison display section as a coincidence signal to the operator, and making it possible to reliably stop the moving object at the preset position.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically showing the electrical circuit of the main part of the device of the present invention, and FIG. 2 is a flowchart showing its structure along with its operation.

Claims (1)

[Scope of utility model registration request] A movable body that movably guides a liner, scale, etc. along a guide rail, a preset input section for inputting in advance the amount of movement of the movable body along the guide rail, and the amount of movement of the movable body along the guide rail. a movement amount detection section that detects the movement amount, a comparison display section that compares the movement amount detected by the movement amount detection section and the movement amount preset input to the preset input section and displays the difference; In a preset brake device comprising an electromagnetic brake device that is activated by a signal to stop a moving object relative to a guide rail, the comparison display section displays an indication when the difference in the amount of movement reaches a near-zero value that is smaller than a predetermined amount. A preset device for a line drawing machine, a drafting machine, etc., characterized in that it has a display stop function to stop the display, and the electromagnetic brake device operates the brake in response to a coincidence signal after the display of the comparison display section stops.・Brake device.