JPH10324089A - Plotter - Google Patents

Abstract

(57) [Summary] (Corrected) [PROBLEMS] In a paper moving type plotter, when an image head moves between two positions of a drawing area and a non-drawing area in the Y-axis direction at the time of pen replacement or the like, an image is displayed. The bottom surface of the line head and the pen are prevented from contacting the paper to prevent the paper from becoming dirty or causing paper jam. SOLUTION: When an image head 18 moves between two positions of an image forming area and a non-image forming area along a Y axis for a pen exchange or a supply / discharge center operation, a front end portion 52b of a sheet 52 is provided.
When the opposing distance on the X axis between the object and the object head is equal to or less than a predetermined value, the sheet is driven by the drive roller 12 to a position where the opposing distance exceeds the predetermined value before the movement between the two positions. Has a front end hanging down below the platen 8. Thus, the curled state of the sheet near the image head is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a sheet placed on a platen is sandwiched between a driving roller and a pressing roller, and the sheet is driven in the X-axis direction by forward / reverse rotation of the driving roller, while a pen is used as a sheet. The present invention relates to a paper-moving type plotter which feeds paper in the Y-axis direction across the paper to draw an image on paper.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No. Hei 5-131792 discloses a paper moving type plotter.
This plotter is used when the edge of the paper reaches the path of movement of the pen, and the edge of the paper that has reached the vicinity of the path of movement is in a curled state itself or rises above the platen due to wind pressure. Then, the photo sensor detects that the edge of the paper has reached the path of the pen so that a part of the paper surface does not touch or get stuck on the tip of the pen. The object is sent to the head, and the object head further raises the pen in response to the detection signal.

[0003]

In a paper moving type plotter, when a pen is exchanged between a pen stocker disposed in a non-drawing area and an image head,
Alternatively, in the case of using a knock-type pencil pen, when performing a supply / discharge operation in which the short lead is discharged to the discharge hole provided in the non-drawing area and the new long lead is fed out to the pen tip, the image head is moved to the drawing area. It moves along the Y axis between two positions in the non-drawing area.

At this time, if the front edge (2a) of the paper (2) has reached near the moving path of the pen (6) of the object head (4) as shown in FIG. When the edge (2a) of (2) itself is in a curled state or rises due to wind pressure, a part of the surface of the paper (2) is placed on the bottom of the object head (4) or the tip of the pen (6). Contact or get stuck. Therefore, there is a problem that an unnecessary line is written on a part of the surface of the sheet (2) or a jam phenomenon occurs on the sheet (2). An object of the present invention is to solve the above problems.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention holds a sheet placed on a platen between a driving roller and a pressing roller, and rotates the sheet by rotating the driving roller forward and reverse. While being driven in the axial direction, the object head having the pen catcher that can be moved up and down is reciprocated in the Y-axis direction within the drawing area, and drawing on the paper with the pen held by the pen catcher is performed. In a plotter in which the image head is reciprocated in the Y-axis direction between a drawing area and a non-drawing area for a feeding / discharging operation or the like, the drawing head is divided into a drawing area and a non-drawing area. When the distance between the front end of the sheet and the object head on the X axis is smaller than a predetermined value when moving between the positions along the Y axis, the sheet is moved to the opposite distance prior to the movement between the two positions. Is the predetermined value It is obtained so as to move to be located.

[0006]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 2 and 3, reference numeral (6) denotes a paper moving type plotter, that is, a paper driven automatic drafting machine, in which a drawing roller (10) and a driving roller (12) are arranged below a platen (8). A Y rail (14) is provided on the platen (8) in the Y-axis direction, and an image head (18) is movably attached to the Y rail (14) via a Y cursor (16). The object head (18) has a built-in elevating body capable of ascending and descending, and a pen catcher (20) is attached thereto. (24) and (26) are a pair of pressing rollers which are in pressure contact with the driving roller (12), and are rotatably supported by an elevating arm attached to the Y rail (14).

(28) A plurality of pens (30) are provided on the outer periphery.
Is a detachable pen stocker, which is rotatably supported by the non-drawing area of the main body (6a) of the plotter (6). In this embodiment, the pen (30) is a knock-type pencil pen, a hollow pen, a ballpoint pen, or the like, and includes a pen holding portion on the outer periphery of the pen stocker (28) and a pen catcher (20) of the image head (18). It is configured such that the pens can be exchanged with each other. In FIG. 2, the pen catcher (20) holds a knock-type pencil pen (30). The supply / discharge core knocking operation of the knock-type pencil pen (30) is performed by pressing the upper portion of the pencil pen (30) against a knock plate (32) disposed above the substrate of the object head (18), and by using a pen catcher (20). ) Is raised and the upper part of the pencil pen (30) is pressed down relatively to the knocking plate (32).

The pen stocker (28) and the image head (1)
8), the object head (18) is moved along the Y-rail (14) to a predetermined position in the non-image area facing the pen stocker (28). (18) is brought closer to the position where the pen catcher (20) engages with the pen stocker (28);
In addition, it is configured to be able to automatically perform this operation by retreating to a predetermined position. Since the configuration of the pen exchange is conventionally known, a detailed description and illustration thereof are omitted. The Y cursor (16) is linked to a Y motor (34) (see FIG. 6), and is configured to be driven in a reciprocating direction along the Y rail (14) by the Y motor (34). . The drawing roller (10) and the driving roller (12) are linked to an X motor (36), and are configured to be driven to rotate forward and backward by the X motor (36).

The pen catcher (20) is linked to a Z actuator (38) such as a moving coil built in the object head (18), and is driven in the vertical direction by the Z actuator (38). Have been. The pen stocker (28) includes a motor (4)
0) and is configured to be driven in the rotational direction by the motor (40). Each of the motors (34)
(36) The (40) and the actuator (40) are connected to the CPU of the controller of the plotter (6) via a driver.
(42) and configured to be controlled by the CPU (42). The CPU (42) is connected to a CAD host computer (46) via an interface (44).

A lead discharge hole (48) is formed in a movement area of the pen catcher (20) along the Y rail (14) and in a non-drawing area deviating from a drawing area of the plotter (6). Below the hole (48), a core storage box (not shown) is detachably attached. The memory (50) of the controller stores paper jam prevention sequence program software. Next, the operation of the present embodiment will be described.

Prior to drawing, cut paper (52) is
It is disposed at a predetermined position on the platen (8), and the driving roller (12) and the pressing rollers (24) (26) are used to form the paper (5).
Grip the sides of 2). The controller is
The drive of the XY motors (36) and (34) and the Z actuator (38) is controlled based on the drawing information transferred from the host computer (46). The drawing roller (10) and the drive roller (12) are driven by the X motor (36).
Rotates the paper (52) in the same direction in the same direction at the same peripheral speed, and moves the paper (52) in the horizontal direction (X-axis direction) in FIG. 2 on the platen (8).

Further, by driving the Y motor (34),
The image head (18) reciprocates in the Y-axis direction along the Y rail (14), and the pen catcher (20) moves up and down by driving the Z actuator (38).
The tip of the pen (30) held by the pen catcher (20) is moved with respect to the paper (52) on the drawing roller (10).
The drawing is performed on the sheet (52) with the pen (30). Next, the paper jam prevention program software stored in the memory (50) will be described.

The position (Px) of the pen (30) on the X axis with respect to the sheet (52) on the platen (8) is
2) The current value counter (not shown) of the controller using the rear end (52a) (see FIG. 5A) as the zero reference of the X axis.
But you can't. Prior to drawing, a rear end (52a) and a front end (52b) of the sheet (52) are paired with a pair of X-axis sensors (54) (5) composed of optical sensors arranged on a plotter.
6), the controller detects the paper (52)
The position on the X-axis of both ends (52a) and (52b) in the longitudinal direction is recognized. Thereby, the rear end (52) of the sheet (52)
a) is set to the zero reference on the X axis of the pen (30),
In addition, an area (MCX) that curls on the sheet (52) and an area (NCX) that does not curl are set.

The zero reference on the Y axis of the pen (30) is set by a Y axis sensor (58) such as a limit switch provided on the Y rail (14). As shown in FIG. 4, the X-axis coordinate value of the front end (52b) of the sheet (52) is (Lx),
The coordinate value of the boundary on the X axis between the uncurled area (NCX) and the curled area (MCX) of the paper (52) is represented by (Lx
Z).

In this embodiment, the area (MCX) is 200
mm. In FIG. 1A, when the controller confirms the end of plotting of the plotter (step 1), the controller determines that the current position (Px) on the X axis of the pen (30) is between the area (NCX) and the area (MCX). It is determined whether it is larger than the boundary (LxZ) (step 2). If the determination is affirmative, the controller drives the X motor (36) to move the drive roller (12) to the state shown in FIG.
, The front end (52b) of the paper (52) is pulled out to the front of the plotter, and the current pen position (Px) is made equal to or smaller than the boundary position (LxZ) of the paper (see FIG. (See FIG. 5A).

Next, the controller sets the image head (18)
A pen return operation of returning the pen (30) to the pen stocker (28) is started (step 4). If a negative determination is made in step 2, the process proceeds to step 4. In the pen returning operation, the image head (18) moves along the Y rail (14) from the drawing area in the paper (52) to the non-drawing area, but the front end side of the paper (52) is the platen (8). The paper (52) does not come into contact with the bottom surface of the object head (18) or the tip of the pen (30) in the raised state.

Next, referring to FIG. 1B, the object head (18) is moved from the pen stocker (28) to the pen (30).
The operation of the object head (18) from the non-image area to the inside of the sheet (52) for image formation will be described. When the controller confirms the end of the pen picking operation of the object head (18) (step 1), the current value (Px) of the pen (30) with respect to the sheet (52) is changed to the X coordinate value of one point on the sheet (52). It is determined whether it is larger than (LxZ) (step 2). Upon determining positive, the controller:
By driving the X motor (36), the paper (52) is moved to the position shown in FIG.
As shown in (3), the current value (Px) of the pen is set to be equal to or smaller than one point (LxZ) on the paper (step 3).

Next, the controller operates a Y motor (34).
To move the object head (18) in the + Y direction along the Y rail (14), and once put the pen catcher (20) into the paper (52) (step 4). next,
The controller drives the XY motors (36) and (34) to move the pen (30) to the drawing start position on the paper (52) (Step 5), and starts drawing (Step 6). If a negative determination is made in step 2, the process proceeds to step 4 as shown in FIG. 5 (B), and the image head (18) is put into the paper (52) as it is. In the above embodiment,
In relation to the pen exchange operation, the object head moves from the inside of the paper to the non-printing area and moves from the non-drawing area to the inside of the paper, such as a pen catcher (2).
The pen (30) held in (0) is moved above the lead discharge hole (48), and a knocking operation is performed here to drop the short lead into the lead discharge hole (48), and the long lead to the pen (48). The paper jam prevention program software can also be applied to the supply / discharge operation for feeding to the tip of 30).

[0019]

As described above, according to the present invention, when the object head moves in and out of the sheet in the Y-axis direction, a part of the surface of the sheet contacts the bottom of the object head or the tip of the pen. Therefore, it is possible to prevent an unnecessary line from being drawn on a part of the surface of the paper and to prevent a paper jam from occurring.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the operation of the present invention.

FIG. 2 is a schematic side view of a paper moving type plotter.

FIG. 3 is a plan view of a paper moving type plotter.

FIG. 4 is an explanatory diagram of the present invention.

FIG. 5 is an explanatory diagram of the present invention.

FIG. 6 is a block diagram of a paper moving plotter.

FIG. 7 is an explanatory diagram of the present invention.

[Explanation of symbols]

 2 paper 2a edge 4 image head 6 plotter 8 platen 10 drawing roller 12 drive roller 14 Y rail 16 Y cursor 18 image head 20 pen catcher 24 press roller 26 press roller 28 pen stocker 30 pen 32 knock plate 34 Y motor 36 X motor 38 Z actuator 40 Motor 42 CPU 44 Interface 46 Host computer 48 Core ejection hole 50 Memory 52 Paper 54 X axis sensor 56 X axis sensor 58 Y axis sensor

Claims (1)

[Claims] 1. A paper catcher, comprising: a paper catcher which is sandwiched between a driving roller and a pressing roller for driving the paper in an X-axis direction by forward and reverse rotation of the driving roller, and which can move up and down. The object head is reciprocated in the Y-axis direction in the image forming area, and the image is drawn on the paper with a pen held by the pen catcher, and the object head is drawn for a pen exchange or a supply / discharge operation. In a plotter that reciprocates in the Y-axis direction between an area and a non-image area, when the object head moves along the Y axis between two positions of the image area and the non-image area, the leading edge of the sheet When the opposing distance on the X axis between the unit and the object head is equal to or less than a predetermined value, the sheet is moved to a position where the opposing distance exceeds the predetermined value prior to the movement between the two positions. Featured professional Tta.