JPH04107193A - Plotter - Google Patents

Abstract

PURPOSE:To prevent elongation or contraction of a sheet due to the influence of the atmospheric air during drafting by providing an atmospheric air inlet communicating the inside with the outside at a leg, or arranging a blower in the inlet. CONSTITUTION:Blowers 36, 38 are arranged in atmospheric inlets 32, 34 formed to communicate the inside with the outside of legs 4, 6. Dustproof slit plates 40 are arranged in both side openings of the inlets 32, 34. When the blowers 36, 38 are driven, an air flow occurs between the legs 4, 6 and the atmosphere to eliminate differences of temperature and moisture between the legs 4, 6 and the atmosphere. Even if the blowers 36, 38 are not provided in the inlets 32, 34, the air flow occurs between the legs 4, 6 and the atmosphere, and hence the temperature, moisture differences between the legs 4, 6 and the atmosphere can be sufficiently eliminated.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a paper-driven plotter.

[Prior Art] As shown in FIG. 6, the roll paper 4 held by the roll paper delivery means 2 is fed out onto the platen 10 via the tension roller 6°8, and the roll paper 4 on the platen 10 is
After being held between the drive roller 12 and the pinch roller 14, the roll paper 4 is wound up by the roll paper winding means 18 via the tension roller 16, and the roll paper 4 is wound up by the forward and reverse rotation of the drive roller 12. A plotter is known in which plotting is performed on the roll paper 4 by feeding the paper 4 horizontally on a platen 10 in the figure, while feeding the ben 20 in a direction perpendicular to the plane of the paper on a plotting roller 22.

In the above plotter, before plotting on the roll paper, the roll paper 4 is extended out from the feeding means 2 according to the plotting range, as shown by the dotted line 4a in FIG. 6, and then seasoned. This seasoning involves taking out a portion of the roll paper from the feeding means 2, exposing the roll paper to the outside air, and then moving the entire drawing range of the roll paper for one time to the platen 10 by forward and reverse rotation of the drive roller 12. This refers to the action of sending the ball in the left and right directions several times. When the roll paper 4 is rolled out from the roll portion 4b and exposed to outside air, it expands and contracts under the influence of temperature and humidity. Seasoning is performed to expand and contract the roll paper in advance to prevent the roll paper from expanding and contracting during drawing. If the roll paper expands or contracts during drawing, it will cause deterioration in drawing quality.

[Problems to be Solved by the Invention] In the above plotter, between the outside of the plotter and between the legs,
There are differences in temperature and humidity. Particularly, the area between the legs is near the 11 source at the bottom of the platen and the control device, and heat tends to accumulate there. By the way, a change in humidity of 5% causes a change in paper A by 1.13 mm. Therefore, when the protruding part of the roll paper 4 is conveyed from between the legs to the outside of the plotter during plotting, or vice versa, the protruding part of the roll paper 4 expands and contracts due to humidity and temperature differences, resulting in deviation of one plot. There were defects that caused damage to the paper.

The present invention aims to eliminate the above-mentioned defects.

[Means for Solving the Problems] In order to achieve the above object, the present invention rotatably supports a feeding means for supporting the roll portion of the roll paper on one side of the front and rear sides of a pair of legs. is wound up through a platen on the leg body onto a winding means rotatably supported on the other side of the leg body, and a feeding portion of the roll paper on the platen is controlled by a drive roller and a pinch roller. With the feeding portion of the roll paper being clamped and loosened by a predetermined amount below the platen, the feeding portion of the roll paper is fed forward and backward on the platen by the rotation of the drive roller, while the pen is In the plotter, the plotter is configured to perform predetermined plotting on the protruding part by controlling movement in a direction across the protruding part of the roll paper, and the leg body is provided with an outside air inlet that communicates the inside and the outside thereof, or, A blower is disposed at the outside air inlet.

[Function] The difference in humidity and temperature between the legs of the plotter and the outer part of the plotter is almost eliminated by the ventilation effect of the outside air inlet or this and the blower, preventing the roll paper from expanding and contracting during plotting. be able to.

[Embodiments] The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 2 denotes the main body of a paper-driven (vapor moving type) automatic drawing machine (plotter), which is fixed to the upper ends of a pair of legs 4 and 6. A platen (paper mounting plate) 8 is disposed on the main body 2, and a drawing head 10 is mounted on the platen 8 along a horizontal rail 12 fixed to the main body 2 in a direction perpendicular to the plane of the paper in FIG. It is movably located. Below the groove of the platen 8 is a drawing roller 12 and a driving roller 1.
4 is arranged in conjunction with the rotary drive device. A pinch roller 16 is arranged above the drive roller 14 so as to be able to press against it. The pen 18 held by the pen holder of the drawing head 10 is attached to the drawing roller 12.
is placed above. The pen holder is connected to an elevating drive device (not shown) built into the drawing head 1o, and is configured so that the pen 18 can be brought into pressure contact with and separated from the roll paper 20 on the drawing roller 12 by raising and lowering the pen holder. ing. A shaft-shaped winding means 22 is rotatably supported between the legs 4 and 6 on the front side of the legs 4 and 6. A rotary means 24 is rotatably supported, and both means are respectively connected to a rotary drive (not shown). A pair of tension rollers 26 and 28 are located below the delivery means 24 and are rotatably suspended between the legs 4 and 6. A tension roller 30 is suspended between the legs 4 and 6, located above the winding means 22. The winding part of the roll paper 20, that is, the roll part 20a, is detachably held in the sending means 24, and the roll paper 20 that has been taken out from the roll part 20a at the rear of the plotter is placed on the platen 8 by the tension rollers 26 and 28 opened. , and the winding means 22 in front of the plotter via the upper surface of the tension roller 30.
The roll paper is wound onto a winding core (not shown). 32. 34 is an outside air inlet provided in the legs 4, 6 so as to communicate between the inside and outside of the legs 4 and 6;
A blower (fan) 36, 38 is arranged here.

Dust-proof slit plates 40 are provided at the openings on both sides of the outside air inlets 32 and 34.

Next, the operation of the embodiment will be explained.

Before starting the drawing operation, depending on the drawing range, the feeding means 24 is rotated in the paper feeding direction to feed out a predetermined amount of the roll paper 2o and loosen it downward.

On the other hand, move the pinch roller 16 from the paper 20 up to the drive roller 1.
4 and press the paper 20 on the platen 8 to the drive roller 14.
and pinch rollers 16.

Next, the driving roller] 4 is rotated in forward and reverse directions to drive the paper 20 several times over the entire drawing range in the horizontal direction in FIG. 2 on the platen 8. The above operation is so-called seasoning. For the above seasoning, the paper 20 is
When the sheet 20 is rolled out from the delivery means 24, it becomes largely slack between the delivery means 24 and the tension cola 26,28. In the above configuration, when the blowers 36 and 38 are driven, air flows between the legs 4 and 6 and the outside air, and there is a difference in temperature and humidity between the legs 4 and 6 and the outside air. disappears.

Note that even if the blower 36.38 is not installed in the outside air inlet 32.34, air flow will occur between the legs 4 and 6 and the outside air, so the temperature between the legs 4 and 6 and the outside air will decrease. and humidity differences can be sufficiently eliminated.

[Effects] Since the present invention is configured as described above, it is possible to prevent the paper from expanding and contracting due to the influence of the outside air during drawing, and there is an effect that it is possible to eliminate deviations in drawing and damage to the paper. .

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is an exploded external view. 2... Main body, 4, 6 leg body, 8... Platen, 10
...Drawing head, 12...-Drawing cola, 14 thread drive roller, 16...Pinch roller, 18...Pen, 2
゜Roll paper, 22... Winding means, 24... Roll paper sending means, 32.34... Outside air introduction port, 36.3
8...Blower, 4o...Slit plate. Patent applicant: Muto Kogyo Co., Ltd. Representative Patent Attorney Aya Nishijima Figure 3

Claims (2)

[Claims] (1) A feeding means that supports the roll part of the roll paper is rotatably supported on one side of the front and rear sides of a pair of legs, and the roll paper is passed through a platen on the legs and then transferred to the other side of the legs. The feeding section of the roll paper on the platen is held between a drive roller and a pinch roller, and the feeding section of the roll paper is positioned below the platen. While feeding the extended portion of the roll paper in the front and back direction of the platen on the platen by rotating the drive roller in a state where the paper is loosened by a certain amount,
In the plotter, in which a predetermined plot is drawn on the protruding part by controlling the movement of a pen in a direction across the protruding part of the roll paper, the leg body is provided with an outside air inlet that communicates between the inside and the outside of the plotter. A plotter characterized by: (2) The plotter according to item 1, wherein a blower is disposed at the outside air inlet.