JPS60228197A - Automatic drawing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a mechanism for detecting the amount of ink consumed by a ballpoint pen in an automatic drawing device using a ballpoint pen to prevent a number of cars from continuing drawing without running out of ink. .

[Conventional technique assistance]

Conventionally, when an automatic drawing device using a ballpoint pen is operated for a long time to draw an 11-hour drawing, the ballpoint pen used may run out of ink during the drawing.

In such a case, the drawing becomes invalid and the drawing work must be done again.

Therefore, it is necessary to estimate the amount of ink consumed by a ballpoint pen, and to take precautions such as replacing pens that are likely to run out of ink during drawing with new ones before starting work. In order to make this determination, management must be carried out, such as recording the amount of time the ballpoint pen is used.

However, the usage time of the ballpoint pen, that is, the drawing time, is not necessarily proportional to the amount of ink consumed, and the actual axis drawing distance of the ballpoint pen varies depending on the number of vertical movements of the ballpoint pen. Therefore, the ballpoint pen must be replaced with plenty of time to spare, which often results in the ink remaining in the ballpoint pen being wasted.

[Purpose of the invention]

The purpose of the present invention is to provide a mechanism that constantly detects the amount of ballpoint pen consumption during drawing and detects this immediately before it runs out of ink, in an automatic drawing device that conventionally predicts the amount of ballpoint pen consumption and replaces it in advance. By providing
To enable efficient work of an automatic drawing device and to eliminate waste of ballpoint pens.

[Structure of the invention]

The present invention uses a ballpoint pen in which the shaft near the pen tip is made of a transparent material so that the ink can be seen from the outside, and a light emitting body inside a support on which the ballpoint pen is mounted, and an optical axis of the light emitting body. is constructed by providing a light receiving section at a position that can be reached through the transparent part of the ballpoint pen.

[For production]

With the above-described configuration, when the ink in the ballpoint pen decreases during drawing and reaches the transparent shaft, the light emitted from the light emitting body, which was previously blocked by the ink, reaches the light receiving section.

At this point, it can be detected that the amount of ink consumption has exceeded a certain value.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a sectional view of a ballpoint pen used in an automatic drawing device according to a first embodiment of the present invention. In FIG. 1, 1 is a metal pen tip, 2 is a ball of the pen tip, 3 is an ink shaft made of a transparent material, 4 is a shaft made of a material that does not transmit light, 5 is ink. The transparent part 3 extends over the entire circumference of the ballpoint pen, and the ink 5 can be seen from the outside.

Figures 2 (a) and (b) are simplified cross-sections of the ballpoint pen shown in Figure 1 attached to the support, and Figure 2 (a) shows the ballpoint pen with sufficient ink. FIG. 3B shows a case where the ink in the ballpoint pen has decreased. In FIG. 2, 6 is a ballpoint pen, 7 is a support, 8 is a light emitter, such as a light emitting diode, and 9 is a light receiving section, such as a phototransistor.

In FIG. 2(a), there is enough ink 5 within the ink shaft of the ballpoint pen 6, so that the light beam between the light emitting section 8 and the light receiving section 9 is blocked. However, as the usage time of the ballpoint pen becomes longer and the amount of ink 5 decreases, as shown in Fig. 2 (b).
The state becomes l. Then, the light emitted from the light emitter 8 passes through the transparent shaft portion of the ballpoint pen 6 and reaches the light receiving section 9. Therefore, at this point, it can be detected that the ink in the ballpoint pen 6 has fallen below a certain value.

Next, a second embodiment of the present invention is shown in FIG. 3, which is a sectional view of a ballpoint pen used in an automatic drawing device. 3-
a, 3-6 and 3-c are ink shaft portions made of a transparent material. In FIG. 3, parts given the same numbers as in FIG. 1 indicate the same parts as in FIG. 1.

FIG. 4 is a sectional view showing the state in which the ballpoint pen shown in FIG. 3 is attached to the drawing device, and 8-a, 8-b, and B-c are light emitting bodies, and 9-a, 9-b, 9- C is a light receiving part, and the transparent shaft part of the ballpoint pen is placed in the middle of each part.

In FIG. 4, parts with the same numbers as in FIGS. 2(a) and 2(b) indicate the same parts as in FIG. 2(al t(b)).

With this configuration, the amount of ink consumption is detected in three stages, indicating the usage status of the ballpoint pen up to the present. Then, when the optical axis between the light emitter g-c closest to the pen tip and the light receiving section 9-C opens, the ballpoint pen is replaced.

As described above, since it is possible to automatically detect when the amount of ink consumed by a ballpoint pen has decreased, it is possible to automatically know when to replace the ballpoint pen.

Therefore, when a warning buzzer or the like is detected, drawing can be interrupted by sounding an alarm buzzer, or if a plurality of ballpoint pens are attached to the support, drawing can be restarted using another ballpoint pen. All such processing can be freely set using the control device within the automatic drawing device.

That is, according to the present invention, the following effects can be obtained.

■ Even if you do not know the usage history of the ballpoint pen, there is no need to continue drawing even if the ink runs out during drawing.

■ If you make it possible to change the ballpoint pen automatically,
Even if drawing work is done unattended for long periods of time, accidents due to running out of ink will not occur.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a ballpoint pen used in an automatic drawing device according to a first embodiment of the present invention, and FIG. FIG. 2 is a sectional view of a support body equipped with a ballpoint pen with a reduced amount of ink; FIG. 3 is a sectional view of a ballpoint pen used in the automatic drawing device of the second embodiment of the present invention;
The figure is a sectional view of the support when the ballpoint pen of FIG. 3 is used. (1) Pen tip, (2) Ballpoint pen, (3) Transparent shaft,
(4) Non-transparent shaft, (5) Ink, (6) Ballpoint pen, (Force support, (8) Light emitting part, (9) Light receiving part 84)

Claims (2)

[Claims] (1) A pen in which at least a portion of the shaft near the pen tip is formed of a transparent material, a light emitting body provided in a support body on which the nuclear pen is mounted, and a shaft that is transparent when the pen is mounted on the support body. and a light detection unit provided at a position facing the light emitting body, and when the ink in the pen becomes less than a certain amount, the light emitted from the light emitting body or the light detecting portion of the pen is provided. An automatic drawing device, characterized in that it detects that ink in the pen has decreased by reaching the light detection section through a shaft. (2) At least two parts of the shaft of the pen are formed of a transparent material, and the support has the same number of pairs of light emitters and light detection parts as the forming parts along the shaft of the pen. An automatic drawing device according to claim 1, further comprising an automatic drawing device.