JPH0126360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a pen or writing instrument in an automatic drafting machine. An object of the present invention is to increase the up-down speed of the pen by setting the rising position of the pen in two stages and setting the rising position of the pen at the lower stage during drawing to perform automatic drawing at high speed. In addition, when changing the paper or controlling the movement of the head along the drawing surface with the pen raised, set the pen's raised position to a higher stage. This is to prevent the pen tip from accidentally touching the paper.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

2 is a table of an automatic drafting machine, to which X coordinate rods 4 and 6 are fixed;
Cursors 8 and 10 are movably attached. Reference numeral 12 denotes a Y coordinate rod installed between the X cursors 8 and 10, and a Y cursor 14 is movably attached to this rod. Said X cursor 8, 1
0 and Y cursor 14, X motors 16, 18
When the Y motor 20 is fixedly installed and the X motors 16 and 18 are driven by the computer 22,
The X cursors 8 and 10 are configured to move along the X coordinate rods 4 and 6, and when the Y motor 20 is driven, the Y cursor 14 is configured to move along the Y coordinate rod 12. A head 24 is fixed to the Y cursor 14, and a plurality of pen lifting devices 26 are provided on this head. One of the plurality of pen lifting devices 26 will be explained with reference to FIG. 2. Reference numerals 28 and 30 denote guide shafts fixed to the head board 32, into which holes in the elevating plate 34 are slidably fitted, and a writing instrument 36 consisting of a ballpoint pen is attached to the elevating plate 34. . 38 is the board 3
The lower part of the lifting shaft is fixed to the lifting plate 34, and the lifting shaft 38 is moved upwardly by the elasticity of the coil springs 40 and 42. energized. 46 is a bracket fixed to the head board 32, and a second solenoid 44 is fixed to this bracket. The lower end of the drive shaft 48 of the solenoid 44 is in contact with the upper end of the elevating shaft 38 . A stopper plate 50 is fixed to the drive shaft 48, and is set so that the tip of the writing instrument 36 comes into elastic contact with the drawing paper on the table 2 when the stopper plate 50 is in contact with the upper surface of the casing of the solenoid 44. ing. Reference numeral 52 designates a first solenoid fixed to a bracket 54 fixed to the base plate 32. The lower end of a drive shaft 56 of this solenoid abuts the upper end of the drive shaft 48, and the upper end of the shaft 56 is mounted on the head base plate 32. The elastic force of the coil springs 40 and 42 makes it come into elastic contact with the stopper surface 58 . A stopper plate 60 is fixed to the drive shaft 56, and the lower surface of the stopper plate 60 and the solenoid 5
The distance between the stopper plate 50 and the top surface of the casing of the solenoid 44 is approximately 1/2 of the distance between the stopper disk 50 and the top surface of the casing of the solenoid 44. The figure shows a state in which the solenoids 44 and 52 are off, that is, the coil is not excited, and in this state, the writing instrument 36 is located at the highest position relative to the table 2 surface. The other pen lifting/lowering devices 26 also have the same configuration as described above.

Next, the operation of this embodiment will be explained. first,
The computer 22 selects one elevating device 26 from among the plurality of pen elevating devices 26. The solenoids 44 and 52 of the elevating devices 26 other than the selected elevating device 26 are both kept in the OFF state, and the writing instrument 36 of the non-selected elevating device 26 is held at the highest position. Therefore, while the head 24 is moving, the tip of the writing instrument 36 that is not selected will not inadvertently come into contact with the surface of the drawing paper. Next, computer 22 controls XY motor 1.
6, 18, and 20 to control the movement of the head 24 in a predetermined direction within a plane horizontal to the two surfaces of the table, and also to bring the tip of the writing instrument 36 of the selected pen lifting device 26 into contact with the surface of the drawing paper. Then, draw a predetermined pattern on the drawing paper. The lifting and lowering control of the writing instrument 36 with respect to the two surfaces of the table during drawing is as follows:
The first solenoid 52 receives a command from the computer 22.
is held in the on state, the stopper board 60 is brought into contact with the upper surface of the casing of the solenoid 52, and the second solenoid 44 is controlled on and off in this state. When the first solenoid 52 is turned on and the second solenoid 44 is turned off, the lifting shaft 38 descends,
The tip of the writing instrument 36 is located at a second raised position closer to the table 2 than the highest raised position.
Next, when the second solenoid 44 is turned on, the drive shaft 48 descends until the stopper plate 50 is locked to the upper surface of the casing of the solenoid 44, and the tip of the writing instrument 36 comes into elastic contact with the drawing paper on the second surface of the table. .
By controlling the second solenoid 44 on and off while the first solenoid 52 is turned on in this way, the writing instrument 36 can be moved toward and away from the drawing paper on the table 2 with a short stroke. This allows drawing operations to be performed at high speed. In the case of the head 24 consisting of only a single elevating device, by setting the writing instrument 36 to the highest position when taking the drawing paper in and out of the two surfaces of the table, the tip of the writing instrument 36 can touch the surface of the drawing paper. This makes it possible to easily take drawing paper in and out of the two sides of the table. Incidentally, even if rotary solenoids are used in place of the solenoids 44 and 52, it is possible to set the rising position of the writing instrument in two stages. In the implementation of the present invention, the upper surface of the table 2 constitutes a drawing surface, but the means for forming the drawing surface is not particularly limited to the table 2. Further, the solenoid 52 constitutes a first driving means 52 for driving the writing instrument 36 in the direction toward and away from the drawing surface, and the solenoid 44
It constitutes a second driving means 44. The driving means 52, 44 are not particularly limited to solenoids.

Since the present invention is configured as described above, it is possible to set the driving stroke of the writing instrument short during drawing, thereby increasing the drawing speed.Furthermore, it is possible to increase the drawing speed while changing the drawing paper or moving the head. This has the effect of preventing the tip of the writing instrument that is not used for drawing from accidentally touching the surface of the drawing paper.

[Brief explanation of drawings]

The figures show preferred embodiments of the present invention, with FIG. 1 being a plan view, FIG. 2 being an explanatory view, and FIG. 3 being an explanatory view. 2...Table, 4,6...X coordinate rod, 12...
...Y coordinate rod, 14...Y cursor, 16, 18...
... X motor, 20 ... Y motor, 22 ... Computer, 24 ... Head, 26 ... Pen lifting device, 32 ... Head board, 36 ... Writing instrument, 38
... Lifting shaft, 44 ... Solenoid, 52 ... Solenoid.

Claims (1)

[Claims] 1. A writing instrument 36 is held at a fixed interval with respect to the drawing surface and is movably moved toward and away from the drawing surface on the head 24 whose movement is controlled relative to the drawing surface. 24, first and second driving means 52 and 44 for driving the writing instrument 36 in the direction toward and away from the drawing surface,
The output sides of the first and second drive means 52 and 44 are connected to the writing instrument 36, and the first drive means 52 moves the writing instrument 36 away from the drawing surface during a first standby state. The writing instrument 36 is driven from the first standby position to a second standby position closer to the drawing surface, and the second driving means 44 moves the writing instrument 36 from the second standby position. 1. A writing instrument drive device for an automatic drafting machine, characterized in that the writing instrument drive device is configured to drive the writing instrument until the tip reaches a position in which drawing is possible with respect to the drawing surface.