JPH08112996A - Paper feed mechanism and x-y plotter using the same - Google Patents

Abstract

PURPOSE: To provide a paper feed mechanism and an X-Y plotter using it having simple structures adaptable to the size and thickness of paper sheet by which diagrams can be drawn even on a large-size paper sheet. CONSTITUTION: On a base 11, a first paper feed roller 15 is provided and a sheet of paper P is to be laid. A paper holding body 12 has a second paper feed roller 18 opposite to the first paper feed roller 15. A first motor 17 rotates either the first paper feed roller 15 or the second paper feed roller 18 and transfers the paper P pinched in between the first and second paper feed rollers 15 and 18. A pen 19 can move in a direction perpendicular to the transfer direction of the paper sheet P and plots on the paper P. Accordingly, the base 11 and the paper holding body 12 are connected by an arm 13 on the base 11 side, and a joint 14 is provided at the arm 13 or the base 11 so as to separate and attach the paper feed rollers 15 and 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed mechanism and an XY plotter using the mechanism.

[0002]

2. Description of the Related Art FIG. 13 is a side view of essential parts of a paper feeding and paper pressing portion of a conventional XY plotter. X- shown in FIG.
In the Y plotter, the paper P is sandwiched between the upper rollers 1 and 1 and the lower rollers 2 and 2, and, for example, a shaft 3 to which the lower rollers 2 and 2 are attached is rotationally driven by a motor (not shown). The paper P sandwiched between the rollers 1 and 2 is transported in a direction orthogonal to the paper surface. Then, a pen (not shown) is provided so as to be movable in a direction (left-right direction in the drawing) orthogonal to the paper transport direction, and a figure or the like can be drawn by feeding the paper and moving the pen. 4 is the upper roller 1,
A shaft 1 is attached to the base 5, reference numeral 5 is a base, and reference numeral 6 is a side surface reverse concave guide integrally formed with the base 5.

[0003]

By the way, in the conventional XY plotter, the upper roller 1 is attached to the shaft 4, and the shaft 4 is formed in a side-reverse concave shape integrally formed with the base 5. Both ends of the guide 6 are rotatably supported. Therefore, the size of the paper P is determined by the guide 6
There is a problem in that it is limited to within the width H of 1 and can handle only one type of paper (for example, A4 or a paper smaller than the paper) and cannot draw a figure or the like on a large paper. Further, since the shafts 3 and 4 are both attached to the housing that constitutes the base 5 and the guide 6, the thickness of the paper P is also limited, and drawing on thick paper is difficult. Therefore, it is conceivable that the upper roller 1, 1 can be moved up and down with respect to the base 5 by utilizing the suspension structure, but this makes the structure complicated.

A first object of the present invention is to provide a paper feeding mechanism which can cope with the size and thickness of paper with a simple structure.

A second object of the present invention is to provide an XY plotter which has a simple structure and can cope with the size and thickness of a sheet, and can draw a figure or the like on a large sheet.

A third object of the present invention is that X does not require, for example, a biasing means (spring) for pressing the paper sheet.
-To provide a Y plotter.

A fourth object of the present invention is to check how the head plots (drawing if the head is a pen, cutting if the head is a knife) from the recess, and if the plotter is a toy. For example, it is to provide an XY plotter where you can enjoy watching the situation.

[0008]

[Means for Solving the Problems]
Paper feed roller is provided, and a base on which the paper is placed,
A sheet holding member provided with a second sheet feeding roller facing the first sheet feeding roller; and a drive unit for rotating either the first sheet feeding roller or the second sheet feeding roller. A paper is connected to the paper holder by an arm at one end side of the base, and a joint is provided on the arm or the base so that both paper feed rollers can be brought into contact with and separated from each other, and a paper is provided between the first and second paper feed rollers. This is achieved by the first means for transporting the sheet with the sheet sandwiched therebetween.

The second purpose is to hold a sheet provided with a first paper feed roller, a base on which a paper is placed, and a second paper feed roller facing the first paper feed roller. Drive means for rotating the body and one of the first and second paper feed rollers to move the paper sandwiched between the first and second paper feed rollers; and a drive direction orthogonal to the paper transport direction. Is provided with a head for plotting on the paper, and the base and the paper holder are connected by an arm on one end side of the base,
This is achieved by a second means in which a joint is provided on the arm or the base and the paper feed rollers can be brought into contact with and separated from each other.

The third object is, in the second means,
This is achieved by a third means in which a moving means for moving the head is provided on the paper holder and the paper is held by its own weight.

The fourth object is, in the second means,
The head is attached to the inside of the paper holder, and is achieved by a fourth means in which a concave portion is provided on the side of the paper holder facing the base.

[0012]

In the first means, since the other end of the base is free, it is possible to feed a large sheet of paper, and by providing a plurality of joints, it is possible to cope with a thick sheet of paper. it can.

In the second means, since the other end of the base is free, it is possible to draw a figure or the like even on a large sheet, and by providing a plurality of joints,
It is also possible to handle thick paper.

In the third means, for example, an urging means (spring) for pressing the paper is unnecessary.

In the fourth means, it is possible to confirm the state of plotting by the head (drawing if the head is a pen, cutting if the head is a knife) from the concave portion, and the plotter is a toy. If so, you can enjoy watching it.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of an XY plotter according to an embodiment of the present invention, FIG. 2 is a front view of the interior of the XY plotter, FIG. 3 is a plan view of the XY plotter, and FIG. Indicating XY
5 is a left side view of the inside of the plotter seen through, FIG. 5 is a bottom view of the XY plotter with the bottom lid cut away, FIG. 6 is a sectional view taken along the line EE of FIG. 2, and FIG. 7 is shown in FIG. A right side view of the inside of the XY plotter, FIGS. 8 (a), (b), and (c) are front and bottom views of the cam of the XY plotter, and a left side view of FIG. 8 (a). 9 (a), (b), (c), and (d) are a plan view, a front view, a side view, and a vertical sectional view of a pen holder of an XY plotter.
(a), (b), (c) are explanatory views showing the operation of the XY plotter,
(b) and (c) are explanatory views of the pen-down and pen-up states as viewed from the direction D in FIG. 10 (a), and FIGS.
FIGS. 12 (b) and 12 (c) are explanatory diagrams, and FIG. 12 is an explanatory diagram of an XY plotter of another embodiment of the present invention.

In the XY plotter in this embodiment, a base 11 on which a sheet is placed and a sheet holder 12 arranged on the base 11 so as to face each other are connected to each other to form a base 11
And an arm 13 extending from one end thereof.

On the upper surface of the base 11 which is a paper mounting surface,
The first paper feed rollers 15 and 15 are exposed, and the first paper feed rollers 15 and 15 are provided with a first motor (for example, a stepping motor) 1 via a first shaft 16.
7, the sheet is driven to rotate so as to transfer the sheet.

Second paper feed rollers 18, 18 are rotatably attached to the lower surface of the paper holder 12 so as to correspond (oppose) the first paper feed rollers 15, 15. Although not shown, the second paper feed rollers 18 and 18 are urged downward by springs and come into contact with the first paper feed rollers 15 and 15 when the paper is not placed on the base 11. ing.

The paper holder 12 is provided with a pen moving mechanism 20 for holding the pen 19 and moving it in a direction orthogonal to the paper transport direction, and a pen vertical drive mechanism 23.
The pen moving mechanism 20 includes a second motor (for example, a stepping motor) 21, a screw shaft 22, and the like. The screw shaft 22 is connected to the drive shaft of the second motor 21, and the carriage 40 is screwed onto the screw shaft 22. The screw shaft 22 is laid horizontally and supported rotatably in a direction orthogonal to the paper feeding direction. When the second motor 21 is driven, the screw shaft 22 is rotated and the carriage 4
0 is transferred to the right or left in FIG. As the carriage 40 is moved, the pen 19 is also moved to the right or left in FIG. A pen holder 32 is provided on the carriage 40.
Is provided so as to be movable in the vertical direction of FIG. 2 and to be transported together with the carriage 40 in the right or left direction of FIG. As shown in FIGS. 9A, 9B, 9C, and 9D, the pen holder 32 includes a stepped guide shaft and a coil spring into which a guide pin 46 protruding from the carriage 40 is inserted. The insertion hole 32a, the pair of regulating plates 32b and 32b hanging downward from the side surface, and the pen holding portion 3 for holding the pen 19.
2c and a tightening hole 32d through which a screw for inserting and tightening the pen 19 into the pen holding portion 32c is inserted. Guide shaft and coil spring insertion hole 32a
The upper end of a coil spring 45 that biases the pen holder 32 upward with respect to the carriage 40 is inserted into the position up to the stepped position. Further, as shown in FIG. 10A, the pair of restriction plates 32b and 32b are lightly sandwiched on both sides in the moving direction of the carriage 40 so as to be slidable in the vertical direction in the drawing. By this, the transfer of the carriage 40 is stably transmitted to the pen holder 32, and is also guided during the up / down operation of the pen 19.

The pen up-and-down drive mechanism 23 is composed of a third motor (for example, DC motor) 24, a cam 25 and the like. As shown in FIG. 2, the third motor 24 is mounted inside the sheet holder 12 with its drive shaft 35 facing downward, and a cam 25 is fixed to the drive shaft 35. As shown in FIGS. 8 (a), 8 (b) and 8 (c), this cam 25 has a drive shaft 3
No. 5 fitting hole 25a and stopper engaging portion 25 formed of a recess
b, the slope 25c1 and the flat surface 25 formed on the lower surface
and a cam portion 25c composed of c2. A stabilizer (shaft) 38 is arranged above the screw shaft 22 described above. This stabilizer 38 is formed by bending a bar material, and has a linear middle portion 3
8a and shaft portions 38b, 38b in which both ends of the intermediate portion 38a are bent and formed in a crank shape. The stabilizer 38 has shaft portions 38b, 38b supported by a bearing portion (not shown) of the sheet holder 12, and an intermediate portion 38a is pivoted around the bearing portion.
The intermediate portion 38a is in contact with the cam portion 25c of the cam 25, and the upper surface of the pen holder 32 is in contact with the lower portion of the intermediate portion 38a. The pen holder 32 holds the pen 19, and the pen holder 32 is swingably provided. Therefore, the pen 19 is also movable in the vertical direction of FIG. In such a state, the pen 19 is shown in FIG.
Since the spring 45 shown in FIG. 0 biases the carriage 40 upward in FIG. 2 via the pen holder 32, the intermediate portion 38 a of the stabilizer 38 is connected to the cam portion 25 c of the cam 25 via the pen 19 and the pen holder 32. Being pressed against. Therefore, when the third motor 24 is driven to rotate the cam 25 to the right or left, the inclined surface portion 25c1 or the flat surface portion 25c2 of the cam portion 25c is selectively positioned with respect to the intermediate portion 38a of the stabilizer 38. You can Then, the slope portion 25c1 of the cam portion 25c
Is located, the intermediate portion 38a of the stabilizer 38 is
Is moved to the upper position by the elastic force of the spring 45, the pen 19 (pen tip) is in a pen-up state in which it is separated from the paper, and when the flat surface portion 25c2 of the cam portion 25c is positioned, the stabilizer 38 The intermediate portion 38a is moved to the lower position by the cam portion 25c against the elastic force of the spring 45, so that the pen 19 comes into a pen-down state in which it comes into contact with the paper.

The arm 13 is fixed to one end of the base 11 and comprises a first arm 13a extending upward and an L-shaped second arm 13b fixed to the sheet holder 12.
The two arms 13a and 13b are connected by a shaft 14 serving as a joint, and the second arm 13b and the sheet holder 12 are rotatable about the shaft 14 as shown by an arrow A in FIG. Has become. The second arm 13 of this arm 13
By raising b and inserting the paper P into the lower surface of the paper holder 12, and by using a mechanism that holds the paper with one arm 13 that moves up and down, the degree of freedom with respect to the size of the paper (from small paper to large paper) is increased. Can be increased. The first arm 13a
As shown in FIG. 6 and FIG. 7, is configured by combining two case portions with screws. Reference numerals 26 and 27 are bearings of the first shaft 16, 28 is a pinion gear of the first motor 17, and 29 is a driven gear. Reference numeral 30 is a slit for protruding the pen 19 provided on the paper holder 12, and 47 is a moving slit for the pen 19 provided on the paper holder 12 and the arm 13. Reference numeral 31 denotes a recess provided on the lower surface of the paper holder 12, and the recess 31 of the paper holder 12 is provided so as to substantially cover the range in which the pen 19 moves, and
The depth (the amount of depression) of the concave portion 31 is set to increase as it goes to the center of the moving range of the pen 19. In this way, by making the amount of depression in the central portion of the concave portion 31 larger than that in the peripheral portion, it is possible to make the drawing of the central portion where the pen 19 mainly moves easier to see.

Reference numeral 33 is a screw, 34 is a guide shaft for stably guiding the movement of the carriage 40, and 35 is a third
Drive shaft of the motor 24, 36 is the second paper feed roller 18
Is a shaft (rotation shaft), 37 is a motor receiver, 39 is a stopper for restricting the rotation range of the cam 25, 41 is a pen tip of the pen 19, and 42 is a bottom lid of the base 11.

Reference numeral 43 denotes an opening formed in the upper surface portion of the first arm 13a of the arm 13, from which the second arm 1 is opened.
3b is projected. Reference numeral 44 denotes an opening formed near the joint of the second arm 13b of the arm 13, and a wire tangent to the second motor 21, the third motor 24, etc. is routed through the opening 44, The wiring is not exposed to the outside of the arm 13 or the paper holder 12.

Next, the operation of the above embodiment will be described. When using this XY plotter, the second arm 13
By rotating b, the paper holder 12 is raised, a gap is provided between the first paper feed roller 15 and the second paper feed roller 18, and the paper P to be drawn is placed on the first paper feed roller 15. After that, the paper holder 12 is lowered to move the paper P to the first position.
It is sandwiched between the paper feed roller 15 and the second paper feed roller 15. At this time, the paper P moves to the first position due to the weight of the paper holder 12.
The sheet P is nipped by the sheet feed roller 15 and the second sheet feed roller 15 with an appropriate pressure, and the sheet P is surely ready to be fed. Then, the first motor 17 is controlled by a control device (not shown).
Through driving the third motor 24, the paper P is fed, the pen 19 is moved, and the pen up-and-down drive mechanism 23 is operated to move the pen 19 up and down. Can be drawn.

The operation of the pen up / down drive mechanism 23 will be described with reference to FIGS. 10 and 11. Figure 10 (a)
Indicates the state of transition from pen up to pen down,
10 (b) and 11 (a) show the pen 19 in the pen-down state, and FIGS. 10 (c) and 11 (b) show the pen 19 in the pen-up state. In addition, in FIG. 10A, a part of the pen 19 and the pen holder 32 is cut out to insert the insertion hole 3
The relationship between the 2a, the coil spring 45, and the guide pin 46 can be understood, and the restriction plate 32 is shown in FIGS. 10 (b) and 10 (c).
b, the coil spring 45 is not shown. Also,
11A and 11B are views of the cam 25 cut horizontally by the cam engaging portion 25b and viewed from above. In the pen-down state, the flat portion 25c2 of the cam 25 is fixed to the stabilizer 3
8 is located on the intermediate portion 38a of the cam 8, and the flat portion 25c2 of the cam 25 pushes down the pen 19 against the coil spring 45. As a result, a desired figure or the like is drawn on the paper P by the pen 19. When pen-up is performed from this pen-down state, the third motor 2
4 is driven to rotate the cam 25, the stopper 39 of the cam 25 is stopped (engaged) with the stopper engaging portion 25b as shown in FIGS. 10 (c) and 11 (b). To be done. At this position, on the intermediate portion 38a of the stabilizer 38,
As shown in FIG. 10 (c) and FIG. 11 (b), the slope 25c1 of the cam 25 is located, and the pen 19 and the pen holder 3
2 is pushed up by the coil spring 45.
In this pen-up state, since the pen 19 is not in contact with the paper P, even if the pen 19 moves with respect to the paper P, it is not recorded. Further, when pen-down is performed from this pen-up state, if the third motor 24 is driven in the direction opposite to the pen-up direction, the cam 25 will move to the cam 25 shown in FIG.
From the state of 1 (b) to the state of FIG. 10 (b) and FIG. 11 (a), similarly, the stopper 39 abuts on the stopper engaging portion 25b to stop the rotation of the cam 25, and the pen down state described above is obtained. Become.

When the pen 19 moves up / down,
Since the regulation plates 32b and 32b of the pen holder 32 are in contact with both sides of the carriage 40 (the left and right sides in FIG. 10) to guide the movement of the pen holder 32, the pen 19 is not moved.
The down is done smoothly.

Further, the pen 19 has an extremely simple structure including a cam 25 with a stopper engaging portion 25b for up / down operation, a third motor 24 which is a DC motor, and a stopper 39 for restricting the movement of the cam 25. Since the operation is performed by the cam mechanism, it is not necessary to use an expensive motor such as a stepping motor as the third motor 24, the control circuit thereof is not required, and the cam mechanism can be simplified and reduced in cost.

In this embodiment, the shaft 14 that serves as a joint is set to 1
Although an example in which two joints are provided has been described, a shaft serving as a second joint may be provided at the position of the arrow B in FIG. 1 so that the arm 13 has two joints. As a result, even if the paper P is thick, the rotation shafts (shafts) 16 and 36 of the first and second paper feed rollers 15 and 18 can be kept parallel to each other, so that the paper P can be stabilized. Upper and lower paper feed rollers 15 and 18
Therefore, it is possible to draw a figure or the like regardless of the thickness of the paper P. Further, the joint may be provided on the base (for example, a portion indicated by an arrow C in FIG. 1).

Next, another example of the pen vertical drive mechanism will be described with reference to FIG. In FIG. 12, 12 is a paper holder, 19 is a pen, 22 is a screw shaft, 5
Reference numeral 2 is a load / unload mechanism such as a DC motor and solenoid, 53 is a pen holder rotatable about the screw shaft 22, and 54 is a weight attached to the pen holder 19 side of the pen holder 53. Since other configurations are the same, the operation of the pen up-and-down drive mechanism will be described here. When the load / unload mechanism 52 is, for example, a solenoid, the solenoid is not excited during pen down. Then, since the pen holder 53 is heavier on the end side where the pen 19 is held, the pen holder 53 is urged in the clockwise direction by the weight of the pen holder 53, the weight 54, the pen 19, and the like, and the pen 19 moves to the sheet. A desired pen writing pressure is applied to P to bring it into contact with P. If you want to pen up,
When the solenoid is excited and the drive rod is pulled in, the other end (the left end in the figure) of the pen holder 53 connected to the drive rod is pulled downward as indicated by the arrow, and the pen holder 53 is rotated about the screw shaft 22. It is rotated in the clockwise direction. As a result, the pen 19 is moved upward (for example, by an angle α), and the pen 19 is separated from the paper P. Then, a control device (not shown) can draw a desired figure or the like on the paper P as described above.

In such a pen up / down drive mechanism,
Since the pen writing pressure is applied by the weight method, the writing pressure can be made constant even if the mounting length of the pen, that is, the L dimension in FIG. 12, changes to some extent. Therefore, a general writing instrument can be used as a pen for an XY plotter. Can be used. When the writing pressure is applied by a conventional spring or the like, the writing pressure changes remarkably depending on the L dimension, and therefore, a dedicated pen is generally used in which the L dimension does not vary during mounting. In addition, the entire structure has a simple structure with only one screw shaft required for pen movement, and the members such as shafts for vertically moving the pen that are normally used are not required, thus reducing the size of the plotter as a whole. And cost reduction can be achieved.

In the paper feed mechanism in the above-described embodiment having the above-mentioned structure, the first paper feed roller 15 is provided, and the base 11 on which the paper P is placed, the first paper feed roller 15 and A paper holder 12 provided with a second paper feed roller 18 facing each other, and the first and second paper feed rollers 1
A first motor 17 for rotating any one of the motors 5 and 18 is provided, and the base 11 and the sheet holder 12 are connected by an arm 13 at one end side of the base 11, and a joint is provided on the arm 13 or the base 11. , Paper feed roller 1
Since the sheets 5 and 18 can be brought into contact with and separated from each other and the sheet P is sandwiched between the first and second sheet feeding rollers 15 and 18 to transfer the sheet P, the other end of the base 11 becomes free.
It is possible to feed even a large paper P.

Further, in the XY plotter in the above-mentioned embodiment, the first paper feed roller 15 is provided, and the base 11 on which the paper P is placed and the first paper feed roller 15 are opposed to each other. The paper holder 12 provided with the second paper feed roller 18 and either of the first and second paper feed rollers 15 and 18 are rotated to rotate the first and second paper feed rollers 15 and 18.
First motor 1 for moving the paper P sandwiched between 18
7 and a pen 19 that is movable in a direction orthogonal to the transport direction of the paper P and plots on the paper P. The base 11 and the paper holder 12 are connected by an arm 13 at one end of the base 11. At the same time, a joint (14) is provided on the arm 13 or the base 11, and the paper feed rollers 15,
Since the 18 can be contacted and separated, the other end of the base 11 is free, so that the large paper P can also be drawn with a figure or the like.

In the XY plotter of the above embodiment, the paper holder 12 has the pen moving mechanism 20 and the pen up-and-down drive mechanism 23 incorporated therein.
2 has a certain weight, and the self-weight allows the sheet P to be stably sandwiched between the first and second sheet feed rollers 15 and 18 and transferred, and for example, a biasing means for pressing the sheet P. No special mechanism such as (spring) is required.

Further, in the XY plotter of the above-described embodiment, the pen 19 is mounted inside the paper holder 12, and the recess 31 is provided on the side of the paper holder 12 facing the base 11. , The pen 19 to the paper holder 12
As compared with the case where the pen 19 is arranged outside the device, there is no risk of accidentally touching the pen 19 and affecting the figure or the like being drawn, and the pen moving mechanism 20 (second motor 21)
Since the pen 19 and the pen 19 can be overlapped in the moving direction of the pen, the width dimension (W in FIG. 4) of the paper holder 12 including the pen holder in the paper P transport direction can be reduced, and the XY plotter can be made compact. Can be realized. In addition, you can check the state of plotting with the pen 19 (drawing if the head is a pen, cutting with a knife) from the recess, and if the plotter is a toy, you can enjoy it. You can

[0036]

According to the invention described in claim 1, since the other end of the base is free, it is possible to feed a large sheet.

According to the second aspect of the invention, since the other end of the base is free, it is possible to draw a figure or the like on a large sheet of paper.

According to the third aspect of the invention, for example, an urging means (spring) for pressing the paper is unnecessary.

According to the fourth aspect of the present invention, it is possible to confirm from the concave portion how the head plots (drawing if the head is a pen, cutting if the head is a knife), and use the toy as the plotter. If so, you can enjoy watching it.

[Brief description of drawings]

FIG. 1 is a perspective view of an XY plotter according to an embodiment of the present invention.

FIG. 2 is a front view of the inside of an XY plotter of one embodiment of the present invention seen through.

FIG. 3 is a plan view of an XY plotter according to an embodiment of the present invention.

FIG. 4 is a left side view of the inside of the XY plotter shown in FIG. 2 seen through.

FIG. 5 is a bottom view in which the bottom lid of the XY plotter of the embodiment of the present invention is cut away.

6 is a cross-sectional view taken along the line EE of FIG.

7 is a right side view of the inside of the XY plotter shown in FIG. 2 seen through.

8 (a), (b) and (c) are a front view, a bottom view and a left side view of (a) of an XY plotter according to an embodiment of the present invention.

9 (a), (b), (c), and (d) are XY of one embodiment of the present invention.
It is the top view, front view, side view, and vertical cross-sectional view of the pen holder of the plotter.

10 (a), (b) and (c) are explanatory views showing the operation of the XY plotter of one embodiment of the present invention.

11A and 11B are explanatory views corresponding to FIGS. 10B and 10C.

FIG. 12 is an explanatory diagram of an XY plotter of another embodiment of the present invention.

FIG. 13 is an explanatory diagram of a conventional XY plotter.

[Explanation of symbols]

 11 Base 12 Paper Holder 13 Arm 14 Axis (Joint) 15 First Paper Feed Roller 17 First Motor 18 Second Paper Feed Roller 19 Pen 20 Pen Moving Mechanism P Paper

Claims (4)

[Claims] 1. A base on which a first paper feed roller is provided, on which a paper is placed, a paper holding body provided with a second paper feed roller facing the first paper feed roller, Drive means for rotating either the first paper feed roller or the second paper feed roller, the base and the paper holder are connected by an arm at one end side of the base, and a joint is provided on the arm or the base, A paper feed mechanism, wherein both the paper feed rollers can be brought into contact with and separated from each other, and a paper is sandwiched between the first and second paper feed rollers to transfer the paper. 2. A base on which a first paper feed roller is provided and on which a paper is placed, a paper holder provided with a second paper feed roller facing the first paper feed roller, and the first paper feed roller. A drive unit that rotates one of the first and second paper feed rollers to move the paper sandwiched between the first and second paper feed rollers, and is movable in a direction orthogonal to the paper transport direction. And
A head for plotting on the paper is provided, and the base and the paper holder are connected by an arm at one end side of the base, and a joint is provided on the arm or the base so that the paper feed rollers can be contacted and separated from each other. An XY plotter characterized in that 3. The XY according to claim 2, wherein a moving means for moving the head is provided on the paper holder so that the paper is held by its own weight.
Plotter. 4. The XY plotter according to claim 2, wherein the head is mounted inside the paper holder, and a recess is provided on a side of the paper holder facing the base. .