JPH0436306Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a pencil pressure application device for an XY plotter, and more specifically, it is a device for controlling the movement of a pencil in the X- and Y-axis directions over a given range on a given drawing surface. A pencil in which an appropriate writing pressure is applied to the pencil when the pen holder is moved downward, in an XY plotter equipped with a drawing head that holds a pencil and a pen holder that is movable up and down on the drawing head. The present invention relates to a writing pressure applying device.

(Prior art and its problems) In general, appropriate writing pressure is required depending on the type of drawing means. For example, the writing pressure of an ink pen, ceramic pen, etc. may be small, but a large writing pressure must be applied to a pencil. For this reason, an XY plotter that uses a pencil as a drawing means requires a large writing pressure application device. As a writing pressure application device that applies appropriate writing pressure to a pencil,
The one shown in Japanese Patent Publication No. 58-22359 is known. This device obtains a predetermined writing pressure by using the suction force of a solenoid.

However, this requires a complicated control circuit for controlling the current supplied to the solenoid, which increases costs and makes it difficult to arbitrarily adjust the pen pressure.

On the other hand, some pencil tools have a built-in spring for applying pressure, but these tools require a sliding part inside the main body, and the dimensional accuracy between the main body and the sliding part must be high. There is a problem in that accurate drawing cannot be expected due to rattling in the sliding parts.

(Technical problem of the invention) The technical problem of the present invention is to solve the above problems and provide a pencil pressure applying device for an XY plotter that can easily obtain a predetermined writing pressure with a simple structure. Take it as a challenge.

(Means for Solving the Problems) As a means for solving the above problems, a pencil writing pressure applying device for an XY plotter according to the present invention is provided with a drawing head 1 that supports a pencil vertically movably. In a plotter in which a rail 7 is mounted movably in the X-axis direction, the base of a V-shaped lever 15, a roller 21, and a roller 22 are rotatably pivoted to the Y-rail 7, and one end of the V-shaped lever 15 In addition to pivotally mounting a roller 23, a solenoid 9 and a pulley 16 are provided on the plotter main body A1, and one end 1 of the first actuating wire 11 is provided with a solenoid 9 and a pulley 16.
1a is fixed to an operating lever 8 for vertically driving a pen holder 3 holding a pencil 2, and the other end 1
1b is fixed to the other end of the V-shaped lever 15, one end 12a is fixed to the solenoid 9, and the other end 12b is wound around and fixed to the pulley 16. roller 2
1, 22, and 23, and the pulley 16 is biased by the spring 10 in the direction of pulling the second actuating wire 12.

(Operations and effects of the invention) As described above, according to the invention, when the solenoid is activated and the second wire is pulled to start drawing, the V-shaped lever 15 rotates, and the first actuation wire is pulled. 11 is also pulled, the actuating lever 8 rotates to forcibly drive the pen holder 3 downward, bringing the pencil 2 into contact with the drawing surface.

By the way, after Pencil 2 touches the drawing surface,
The operating lever 8 cannot be rotated any further, but the solenoid 9 continues to operate, so the other end 1 of the second operating wire 12
The spring 10 of the pulley 16 to which 2b is fixed bends and absorbs it. As a result, an elastic force corresponding to a predetermined writing pressure is applied to the pencil 2. If this spring force is set to correspond to a predetermined writing pressure, the above writing pressure will also be applied to the pencil, and good drawings can always be made.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the figure, symbol A indicates an XY plotter. this
The XY plotter A holds a drawing head 1 which is controlled to move in the X-axis and Y-axis directions over a given drawing surface over a predetermined range, and a pencil 2, and is held movably up and down by the drawing head 1. A pen holder 3 is provided, and an X-carriage 6 is provided so as to be movable along an X-rail 5 disposed in the X-axis direction on the plotter main body A1, and a Y-rail is movably movable in the Y-axis direction relative to the X-carriage 6. 7, a drawing head 1 is provided at the tip of the Y rail 7, and the X carriage 6
The drawing head 1 is controlled by a control section (not shown), and the Y rail 7 is moved, and the pencil 2 is moved up and down at a predetermined position to draw.

Next, the XY plotter is provided with a writing pressure applying device attached to the up-down mechanism of the pencil.

That is, as shown in FIG. 3, a box-shaped frame 4 is provided at the tip of the drawing head 1, and within the box-shaped frame 4 are a pair of upper and lower actuating pieces that are integrally formed with the pen holder 3. 3a and 3b extend. The actuating pieces 3a, 3b are attached to a support shaft 2 located at the center of the frame 4.
6 and is provided to be movable up and down, and a convex portion 13 is provided at the upper part of the lower actuating piece 3b.

The base of an operating lever 8 is pivotally attached to the side wall of the frame 4, and its tip is connected to the operating pieces 3a and 3b.
The tip of the movable member 12 is arranged between the movable member 12 and is biased by a spring material 14 so as to rotate upward.

A base portion of a V-shaped lever 15, a roller 21, and a roller 22 are rotatably attached to the Y rail 7, respectively, and a roller 23 is pivotally attached to one end of the V-shaped lever 15.

Further, a solenoid 9 and a pulley 16 are provided at both corners of the plotter main body A1.

Next, one end 11a of the first actuation wire 11 is
It is fixed to an operating lever 8 that drives the pen holder 3 up and down via a roller 25 pivotally mounted to the box-shaped frame 4, and the other end 11b is fixed to the other end of the V-shaped lever 15.

Further, one end 12a of the second actuation wire 12 is
It is fixed to the solenoid 9, the other end 12b is wound around the pulley 16 and fixed to the pin 18, and the intermediate part is connected to rollers 21, 22 and 23 pivotally connected to the Y rail 7, and further to the X carriage 6.
It is wound around rollers 19 and 20 which are pivotally connected to the rollers 19 and 20.

Note that the pulley 16 is biased by a spring 10 in a direction to pull the second actuating wire 12.

By operating the solenoid 9 with the above configuration, the movable part 9a moves to the left side in FIG. 1, and the second actuation wire 12 is pulled, so that the V-shaped lever 1
5 rotates, and the first actuating wire 11 is connected to the spring member 14.
It is pulled toward the other end 11b against the elastic force of.

By the way, the middle part of the second actuating wire 12 is Y
It is wound around two rollers 21 and 22 provided on the rail 7, and also around a roller 22 of a V-shaped lever 15. Therefore, according to the movable pulley principle, in order to move the first actuating wire 11 toward the other end 11b, the tensile force of the second actuating wire 12 acts on the first actuating wire 11. The elastic force of the spring member 14 of the operating lever 8 should be at least half of the elastic force of the operating lever 8.

Similarly, with the intervention of the spring 10, the first and second
When a predetermined tensile force or more is applied to the actuation wires 11 and 12, the spring 10 begins to bend. This tensile force is set to correspond to an appropriate predetermined writing pressure of the pencil 2. in this case,
Since the force acting on the second actuating wire 12 is equal to one-half of the force acting on the first actuating wire 11, the spring 10 has a low spring constant and its elastic force is equal to half of the above-mentioned tensile force. It is set to be 1/1. Note that a torsion coil spring is used as the spring, and is bent in advance to produce the above-mentioned writing pressure.

Note that the first and second actuating wires 11, 12
In addition to the above example, for example, as shown in Figure 4,
The free end portions 11b and 12b may be fixed via a fixing body 24 that accommodates the spring 10 using a compression spring. However, in this case, the spring force of the spring 10 needs to be set to be twice that of the spring 10 described above, that is, a spring force corresponding to a predetermined writing pressure is applied.

In the above configuration, when the solenoid 9 is not activated, the operating lever 8 engages with the lower surface of the upper operating piece 3a and is held in the horizontal direction by the spring force of the spring member 14, so that the drawing head 1 is held at the pen-up position.

On the other hand, when the solenoid 9 is activated, the movable part 9a moves to the left in FIG. 1 and the second actuation wire 12 is pulled toward the solenoid 9.
The V-shaped lever 15 rotates and the first actuation wire 1
1 resists the elastic force of the spring material 14 and the other end 11
It is pulled to the b side. Therefore, the operating lever 8 rotates downward and engages with the upper surface of the convex portion 13 of the lower actuating piece 3b, forcing the pen holder 3 down to the pen-down position and bringing the pencil 2 into contact with the drawing surface.

By the way, after Pencil 2 touches the drawing surface,
Although the operating lever 8 cannot be rotated any further, the movable part 9a of the solenoid 9 continues to move, so that part is absorbed by the spring of the pulley 16 that fixes the other end 12b of the second actuating wire 12. 10 bends and absorbs it. As a result, an elastic force corresponding to a predetermined writing pressure is applied to the pencil 2. Therefore, good drawing can always be performed.

Furthermore, when solenoid 9 is turned off, spring 10
returns to its original position, and the operating lever 8 is rotated upward by the spring force of the spring material 14 to return to its original position, so the upper operating piece 3a is also lifted by the operating lever 8, and the pencil 2 returns to the up position. Return.

[Brief explanation of the drawing]

Fig. 1 is an explanatory plan view of the pencil pressure applying device in the XY plotter, Fig. 2 is an explanatory view of the attachment state of the spring and the free end of the second actuating wire,
FIG. 3 is a side view of the drawing head, and FIG. 4 is an explanatory diagram of another embodiment of the spring. Code A...XY plotter, A1...Protector body, 1...Drawing head, 2...Pencil, 3...
Pen holder, 9... solenoid, 10... spring,
DESCRIPTION OF SYMBOLS 11...First actuation wire, 12...Second actuation wire, 13...Convex portion.

Claims (1)

[Claims for Utility Model Registration] Drawing head 1 supporting a pencil in a vertically movable manner
In this XY plotter, a Y-rail 7 having a Y-rail 7 at its tip is mounted movably in the X-axis direction. A roller 23 is attached to one end of the V-shaped lever 15.
At the same time, a solenoid 9 and a pulley 16 are provided on the plotter main body A1, and one end 11a of the first actuating wire 11 is fixed to the operating lever 8 for vertically driving the pen holder 3 holding the pencil 2. While the other end 11b is fixed to the other end of the V-shaped lever 15, one end 12a is fixed to the solenoid 9, and the other end 12b is fixed by wrapping around the pulley 16. Each of the above rollers 2
1, 22, and 23, and the pulley 16 is biased by a spring 10 in the direction of pulling the second actuating wire 12.