JPH01133798A - Drive system of x-y plotter - Google Patents

Abstract

PURPOSE: To eliminate an unnecessary plotted line and enable normal visible information to be obtained by removing a pen retained by a carriage prior to the absorption of moisture by a recording medium and its expansion when a plotted operation is suspended and causing the recording medium to move forward/backward before the resumption of the plotting operation and further, removing the bulge of the recording medium which is caused by the expansion. CONSTITUTION: A plotting operation is temporarily suspended and for example, when time for the discontinued operation by the suspension is one minute or more, a carriage 2 moves to the left to store a pen into a pen holder. Further, a rotating roller 3 rotates backward to send a recording medium 19 into the direction of an introduction opening. Next, the rotating roller rotates forward to send the recording medium 19 into the direction of a delivery opening. After that, the rotating roller 3 rotates reversely to return the recording medium 19 to its suspension stoppage position. Consequently, the carriage 2 picks up the pen 6b to return to a plotting suspension position and then resumes the plotting operation. When the rotating roller 3 rotates to the right or the left, a force F to draw the recording medium 19 to the outside of a pinch roller 21 is generated as a component of force of a pressing force P, and a bulge 19a developed in the recording medium 19 disappears due to the force F.

Description

[Detailed Description of the Invention] [Summary]
With the aim of eliminating the problem that occurs when the recording medium absorbs moisture and expands during the interruption of Pro 7, especially regarding the drive system that resumes plotting after it is interrupted, multiple pens are stored in the pen holder. In an X-Y plotter in which a carriage automatically brings out one of the rollers to plot on a recording medium, a pair of pinch rollers that face the width direction of the recording medium and press the vicinity of the left end and the vicinity of the right end of the recording medium against a rotating roller. are formed into a taper whose outer diameter decreases toward the opposite center, and when plotting is interrupted for a certain period of time, the carriage stores the pen it holds in the pen holder, and in response to a command to resume plotting, the rotating roller is moved to an appropriate position. After rotating the pen by an angle in the forward and reverse directions, the carriage returns to the interruption stop position and stops, and after the carriage holds one pen and returns to the interruption stop position, plotting is restarted. .

[Industrial application field]

The present invention is one of the data output devices for plotting figures, graphs, etc. on a recording medium (recording paper), and is
This invention relates to an X-Y plotter that is equipped with a control circuit consisting of a RAM, etc., and operates according to commands such as initial conditions, coordinate system setting commands, 2 plotting commands, and information output commands, and particularly relates to a drive system that resumes plotting after it is interrupted. .

[Conventional technology]

FIG. 3 is a perspective view showing the appearance of a conventional X-Y plotter, and FIG. 4 is a perspective view showing the main parts of the plotter.

In FIG. 3, an X-Y plotter 1 that can be used for a variety of applications, from hobby PCs to business graphs, measuring instruments, personal CA, and D, has a pen carriage 2. Rotating friction roller that feeds the recording medium in the front-back direction 3. It includes a pair of pinch rollers 4 that press the recording medium against a rotating roller 3.

In FIGS. 3 and 4, the left side portion 1a of the plotter 1
The rotary pen holder 5 accommodated in the pen holder 5 holds a plurality of pens 6a.
The Ben carriage 2, which holds a pen 6b and takes out one pen 6b from the Ben holder 5, is connected to a pulley 9 attached to the rotating shaft of a step motor 8 provided on the left frame 7, and a pulley 9 attached to the right frame 10. The pen 6b is moved left and right along the guide shaft 12 by a wire 11 stretched between a pulley (not shown), and the up and down movement of the pen 6b toward and away from the recording medium and the operation of taking it out from the pen holder 5 are as follows:
The step motor 13 provided on the frame IO is used to rotate the shaft 14 having a rectangular cross section by, for example, 90 degrees and then another 90 degrees.

A step motor 15 provided on the frame 10 is a rotational power source for the rotating roller 3, and a pair of chart knobs 16 supporting the pinch roller 4, which is movable along a fixed shaft 17 parallel to the rotating roller 3, It can be moved in the left-right direction along the axis 17 of the square cross-section it supports, and can be set at any desired position.

[Problem that the invention seeks to solve]

The drawing operation of the pen 6b that uses the plotter I to plot on one recording medium is not necessarily continuous and may be interrupted. On the other hand, the recording medium generally uses paper, and when the plotter 1 is used under adverse conditions such as high temperature and humidity, if the recording medium absorbs moisture and expands during interruption, it will be held down by a pair of pinch rollers 4. There is a problem in that a bulge occurs during the printing process, and the recording medium comes into contact with the bulge, resulting in unnecessary lines being drawn.

In particular, the X-Y plotter 1 used to continuously and intermittently measure voltage, temperature, etc. over a long period of time is generally installed in a poor environment, and the above-mentioned problems are noticeable.

[Means for solving problems]

According to FIG. 1, the present invention aims to eliminate the above-mentioned problems.
In an X-Y plotter that automatically takes out one of them and plots on the recording medium 19, a pair of pinches that face the width direction of the recording medium 19 and press the vicinity of the left end and the vicinity of the right end of the recording medium 19 against the rotating roller 3 are used. The roller 21 is formed into a tapered shape whose outer diameter decreases toward the opposing center, and when plotting is interrupted for a certain period of time, the carriage 2
The pen 6b to be held is stored in the pen holder, and the rotating roller 3 is rotated by an appropriate angle in the forward and reverse directions according to the pro-nod restart command, and then returned to the interrupted stop position and stopped. This is an X-Y plotter drive system characterized by holding one pen 6a and returning to the suspended position before restarting plotting.

[Effect]

According to the above means, before the recording medium absorbs moisture and expands,
When the pen held by the carriage is removed and the recording medium is moved back and forth before resuming plotting, the tapered pinch roller pulls the recording medium in the width direction, thereby eliminating the bulge caused by expansion of the recording medium. It becomes like this.

Therefore, the unnecessary line plot mentioned in the above problem does not occur.

〔Example〕

Examples of the method of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of the principle of eliminating bulges by the method of the present invention, and FIG. 2 is an explanatory diagram of the operation of an X-Y plotter according to an embodiment of the method of the present invention for eliminating bulges on a recording medium.

In FIG. 1, the pair of pinch rollers 21 that fit on the fixed shaft 17 have a tapered shape whose outer diameter decreases toward their opposing centers, for example, a tapered shape with an inclination angle α of about 3 degrees. The recording medium 19 is pressed against the rotating roller 3 by the pressure P. Therefore, when the rotating roller 3 is rotated to the right or left, a force F is generated on the recording medium 19 as a component of the pressing force P to pull the recording medium 19 out of the pinch roller 21. The bulge 19a formed in the bulge 19 disappears due to the force F.

In FIG. 2, in the χ-Y plotter 22 according to an embodiment of the method of the present invention, a pen carriage 2 moves in the left-right direction along a guide shaft 12, and a pen 6b held by the carriage 2 is
Figures, characters, etc. are plotted on the recording medium 19. A pair of pinch rollers 21 are fitted to a fixed shaft 17 mounted above a rotating friction roller (3) (not shown), and each pinch roller 21 has an inner outer diameter smaller than an outer diameter.
The recording medium 19 is pressed against the rotating friction roller with an appropriate force.

Note that the detailed structure of the pen holder and the pen exchange mechanism are not directly related to the present invention and will not be described in detail; The mechanism is similar to the one previously used.

In such a block 22, as shown in FIG. 2(a), a period of time passes during which the plot is temporarily stopped.
For example, when the interruption stop time has elapsed for 1 minute, as shown in Figure 2 (b)
As shown in FIG. 2, the carriage 2 moves to the left to store the pen 6b in the pen holder, and the rotating roller (3) rotates in the opposite direction to send the recording medium 19 toward its insertion slot (toward the front).

Next, the rotating roller (3) rotates forward, and as shown in FIG.
After the recording medium 19 is fed to the stop position, the rotating roller (3) rotates in the reverse direction so that the recording medium 19 returns to its interrupted stop position, as shown in FIG. 2(d).

Then, the carriage 2 takes out the pen 6b and displays the pen 6b as shown in FIG.
As shown in e), the plotting is restarted after returning to the plotting interruption position.

〔Effect of the invention〕

As explained above, according to the method of the present invention, when plotting is interrupted, the pen held by the carriage is removed before the recording medium absorbs moisture and expands, and the recording medium is moved back and forth before plotting is restarted. The operation causes the recording medium to expand and eliminate the resulting bulge. Therefore, even if the bulge is formed, unnecessary lines are not plotted in the bulge, and normal visible information can be provided.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the method of the present invention, FIG. 2 is a diagram explaining the operation of an X-Y plotter according to an embodiment of the method of the present invention, and FIG. 3 is a perspective view showing the appearance of a conventional X-Y plotter. FIG. 4 is a perspective view showing the main parts of a conventional x-y plotter. In the figure, 2 is a carry, 7 is a rotating roller, 5 is a rotating pen holder, 6a and 6b are recording pens, 19 is a recording medium, 21 is a pinch roller, and 22 is an X-Y plotter.

Claims (1)

[Claims] A pen holder (5) stores a plurality of pens (6a), and a carriage (2) automatically takes out one of the pens (6b) to plot on a recording medium (19). In the Y plotter (22), the Y plotter (22) faces the recording medium (19) in the width direction.
A pair of pinch rollers (21) that press the vicinity of the left end and the vicinity of the right end of the carriage ( 2) stores the pen (6b) to be held in the pen holder (5), rotates the rotating roller (3) by an appropriate angle in the forward and reverse directions according to the plot restart command, and then returns to the interrupted stop position. and stop the carriage (2).
A drive system for an X-Y plotter, characterized in that the plotter resumes plotting after taking out one pen (6a) from the pen holder (5) and returning to its interrupted stop position.