JPH0436302Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a mechanism for correcting height differences on the surface of a plotter's drawing board, which corrects height differences at various points on the surface of the drawing board on which the recording paper of a plotter is placed. .

[Conventional technology]

Conventionally, there has been a plotter called a flat bed plotter as shown in FIG.

This flatbed plotter includes a flat drawing board 12 mounted on a base (not shown) on which recording paper 10 is placed, and a Y-axis bar 14 that reciprocates in the X-axis direction on the surface of the drawing board 12. , a pen cartridge 18 carrying a drawing pen 16 that reciprocates in the Y-axis direction on the Y-axis bar 14 , a drive motor 20 , a pulley 22 and a wire 24 through which the rotational force of the motor is transmitted to the Y-axis bar 14 . Y-axis bar driving means 2 for reciprocating the Y-axis bar 14 in the Y-axis direction,
6, a drive motor 28 for the paint cartridge, a pulley 22 for transmitting the rotational force of the motor to the paint cartridge 18, a wire 24, etc., for reciprocating the paint cartridge 18 in the Y-axis direction along the Y-axis bar 14. It consists of 30 etc.

According to this plotter, based on information received from an external computer, etc., the drive motors 20, 2
8, the Y-axis bar 14 is driven by the Y-axis bar drive means 26 and the paint cartridge drive means 30.
and the pen cartridge 18 are moved back and forth on the surface of the drawing board 12 in the X-axis and Y-axis directions, and the pen 16 carried on the pen 16 is used to draw various figures, characters, etc. onto the recording paper 10 placed on the surface of the drawing board 12. can be drawn automatically.

[Problem that the invention attempts to solve]

However, in the above plotter, the entire wide surface of the flat drawing board 12 does not form the desired flat surface without unevenness, but unevenness occurs in various places on the surface. When drawing figures etc. on the recording paper 10 placed on the recording paper 10 placed on the pen 16 carried by the pen cartridge 18, the figures etc. drawn on the portion of the recording paper 10 placed on the uneven surface portion of the drawing board 12 will be Some of the lines were blurred, some of the lines became thinner, some of them became thicker, and even the tip of the pen 16 tore 10 sections of the recording paper.

This is because it is nearly impossible to form the entire wide surface of the drawing board 12 into a flat surface with no irregularities.

Also, when fixing the drawing board 12 on the base, uneven forces are applied to various parts of the drawing board 12, causing the drawing board to
2, etc. may bend, or the drawing board 12 may bend due to changes in the weather conditions around it.
This is because height differences occur at various locations on the surface of the drawing board 12.

If the surface of the drawing board 12 is uneven in this way, the recording paper 10 at the tip of the pen 16, which is carried by the pen cartridge 18 and moves without moving up and down in a plane parallel to the drawing board 12, This is because the pressure applied to the drawing board 12 changes greatly when moving the portion of the recording paper 10 placed on the uneven surface of the drawing board 12, and may become too weak or too strong.

Incidentally, the same thing as mentioned above can also be applied to a plotter equipped with a plotting board whose surface is in the shape of an arc, etc. In such a plotter, the entire surface of the plotting board on which the recording paper 10 forming the arcuate shape is placed is When drawing a figure on the recording paper 10 placed on the surface of the drawing board with the pen 16 carried in the pen cartridge, the surface of the figure does not form the desired arc shape or the like, but has irregularities in various places. The lines on the recording paper 10 became blurred, thinned, or thickened, making it impossible to accurately draw beautiful figures or the like on the recording paper 10.

The present invention was devised to solve these problems, and its purpose is to make the entire surface of the plotter's flat drawing board into a desired flat surface with no irregularities. It is an object of the present invention to provide a height difference correction mechanism (hereinafter referred to as a height difference correction mechanism) on the surface of a plotter's drawing board, which can be easily corrected without applying any pressure.

[Means for solving the problem] In order to achieve the above object, the height difference correction mechanism of the present invention has a drawing board on which a recording paper is placed on a base, a part of which is fixed to the base. , in the installed plotter, between the drawing board and the base, excluding the drawing board part fixed to the base, there is a bolt protruding from the back of the drawing board, and at least a part of the bolt loosely fitted around the bolt. an adjustment spacer whose layers are made of an elastic material that can be expanded and contracted up and down; a hole provided in the base into which the bolt protruding downward from the adjustment spacer is inserted; and a periphery of the lower end of the bolt protruding downward from the hole. an adjusting nut screwed into the base, the adjustment nut tightening the adjusting spacer between the base and the drawing board as desired, the adjustment means for increasing or decreasing the distance between the drawing board and the base; It is characterized by having the following.

[Effect]

In the height difference correction mechanism configured as described above, the adjusting nut screwed around the lower end of the bolt of the adjusting means is rotated in forward and reverse directions around the bolt to tighten the adjusting nut in the direction of the drawing board or loosen it in the opposite direction.
Then, the adjustment spacer, which is loosely fitted around the bolt and is made of an elastic material in which at least a part of the layer can expand and contract up and down, is strongly held between the drawing board and the base to compress its length, or vice versa. The length of the adjustment spacer, which has been compressed once, is extended by weakly holding it again between the drawing board and the base.

Then, the height of the drawing board mounted on the base relative to the base is adjusted to be high or low via the adjustment spacer whose length is shortened or extended, thereby eliminating unevenness on the surface of the drawing board. be able to.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a preferred embodiment of a plotter equipped with the height difference correction mechanism of the present invention, FIG. 1 is a side sectional view thereof, FIG. FIG. 3 shows a front sectional view of the vicinity of the adjusting means, and FIG. 4 shows a plan view of the base.
The embodiment shown in this figure will be described below.

Reference numeral 12 denotes a drawing board having a double structure and a flat plate shape, which is made by adhering a suction plate 40 onto an aluminum plate 38.

32 is a base 32 on which the drawing board 12 is mounted.

Reference numerals 36a and 36b are frame members constituting the base 32, of which a pair of frame members 36a having a U-shaped cross section are disposed on both sides of the base 32. These four locations are each fixed via four fixing means 42 having the same structure.

The fixing means 42 of the drawing board 12 will be explained in detail as follows.
As shown in FIG. 2, the tip of the bolt 52 is vertically screwed into the aluminum plate 38 on the back side of the drawing board 12, and the flange 50 provided around the bolt 52 is pressed against the back side of the aluminum plate 38, so that the tip of the bolt 52 is screwed vertically into the aluminum plate 38 on the back side of the drawing board 12. It is fixed perpendicularly to the back surface of the drawing board 12. A fixed spacer 48 made of a rigid material and having a substantially cylindrical shape is loosely fitted around the bolt 52. A counterbored hole 54 is provided at the upper end of the fixed spacer 48,
A flange 50 provided around the bolt 52 is fitted into the counterbored hole 54. The upper end surface of the fixed spacer 48 is brought into contact with the back surface of the drawing board 12. A short protrusion 46 for positioning the spacer is protruded from the lower end of the fixed spacer 48, and the short protrusion 46 is connected to a hole 44 formed in the surface of the frame member 36b.
It is inserted into the top. At the same time, the short protrusion 4
A bolt 52 protruding downward from the fixed spacer 48 is inserted into the hole 44 into which the bolt 6 is inserted. A tightening nut 58 is screwed around the lower end of the bolt 52 protruding downward from the hole 44. Then, the tightening nut 58 is tightened in the direction of the drawing board 12, and the fixed spacer 48 is held between the drawing board 12 and the frame member 36a so as not to move. At the same time, the frame member 3
A drawing board 12 is fixed onto the drawing board 6a.

As shown in FIG. 4, between the pair of frame members 36a, three frame members 36b having a U-shaped cross section and forming the base 32 are installed side by side at a predetermined interval. .

Each of these three frame members 36b
Adjustment means 34 having the same structure for increasing or decreasing the distance between the frame members 36b and the drawing board 12 above are provided between the three locations on the surface and the drawing board 12 above them. .

In detail, this adjustment means 34 is as shown in FIG.
The tip of the bolt 52 is vertically screwed into the hole, and the flange 50 provided around the bolt 52 is pressed against the back surface of the aluminum plate 38, thereby fixing the tip of the bolt 52 perpendicularly to the back surface of the drawing board 12. Around the bolt 52, an adjustment spacer 64 having a substantially cylindrical shape, at least a part of which is made of an elastic body 60 that can be expanded and contracted up and down, is loosely fitted. The adjustment spacer 64 shown in the figure is formed by integrally laminating a rigid material 62 such as non-stretchable aluminum and an elastic body 60 such as stretchable rubber. Note that the adjustment spacer 64 may be formed entirely of an elastic material such as stretchable rubber, or may be formed using a coil spring or the like for the elastic material constituting the whole or a part of the layer. good. Adjustment spacer 6
A counterbore hole 54 is provided at the upper end of 4, and a flange 50 provided around the bolt 52 is fitted into the counterbore hole 54. The upper end surface of the adjustment spacer 64 is brought into contact with the back surface of the drawing board 12. A short protrusion 46 for positioning the spacer is protruded from the lower end of the adjustment spacer 64, and the short protrusion 46 is fitted into the upper part of a hole 44 formed in the surface of the frame member 36b. At the same time, a bolt 52 protruding downward from the adjustment spacer 64 is inserted into the hole 44 into which the short projection 46 is fitted. An adjustment nut 58 is screwed around the lower end of the bolt 52 protruding downward from the hole 44. Then, by rotating the adjusting nut 58 in the forward and reverse directions, the adjusting nut 58 is tightened in the direction of the drawing board 12 and loosened in the opposite direction.
An adjustment spacer 64 is provided between the frame member 36b and the frame member 36b.
It is possible to hold the material with any force or weakness. At the same time, the drawing board 12 is mounted on the frame member 36b via the adjustment spacer 64.

The height difference correction mechanism provided in the plotter shown in FIGS. 1 to 4 is constructed as described above.

Next, its effect will be explained.

Adjusting nut 58 of the adjusting means 34 of the plotter mentioned above
The adjusting nut 58 can be tightened in the direction of the drawing board 12 or loosened in the opposite direction by rotating the adjusting nut 58 in the forward and reverse directions around the bolt 52. Then, by adjusting the clamping force of the adjustment spacer 64 held between the drawing board 12 and the frame member 36b, the elastic body 60 on the upper part of the adjustment spacer 64 is compressed, or conversely, the elastic body 60 that has been compressed once is adjusted. Stretch out.

Then, the length of the adjustment spacer 64 including the compressed or expanded elastic body 60 is shortened or expanded, and the part of the drawing board 12 mounted on the frame member 36b is attached to the frame member 36b via the adjustment spacer 64. You can increase or decrease the distance between Then, the height of the drawing board 12 mounted on the frame member 36b, that is, the base 32, can be adjusted in height via the adjustment spacer 64, thereby eliminating unevenness on the surface of the drawing board 12.

FIG. 5 shows another preferred embodiment of a plotter equipped with the height difference correcting mechanism of the present invention, and in detail shows a side view of the area around the drawing board. The embodiment shown in this figure will be described below.

In the illustrated plotter, the surface of the drawing board 12 is in the shape of an arc.

Between the front and rear of the drawing board 12 and the base 32 below, there is a fixing means 42 having the same structure as the fixing means 42 shown in FIG.
Fixing means 42 each having an upper end surface formed in an oblique arc shape following the shape of the back surface of the drawing board 12 are interposed. Then, via the fixing means 42,
The front and rear of the drawing board 12 are fixed on a base 32 so as not to move.

Between the center of the drawing board 12 and the frame member 36b of the base 32 below it is an adjusting means 34 having the same structure as the adjusting means 34 shown in FIG.
An adjustment means 34 is interposed in which the upper end surface of the elastic body 60 above the adjustment spacer 64 is formed into an arc shape following the shape of the central back surface of the drawing board 12.

The rest of the structure is the same as the height difference correction mechanism shown in FIGS. 2 and 3, and the same members are designated by the same reference numerals and their explanations will be omitted.

Next, the operation of the height difference correction mechanism of this plotter will be explained.

Adjusting nut 58 of the adjusting means 34 of the plotter mentioned above
By tightening or loosening, the length of the adjustment spacer 64 including the elastic body 60 is compressed, or conversely, the length of the spacer 64 that has been compressed once is lengthened.

Then, by increasing or decreasing the distance between the center of the drawing board 12 and the frame member 36b below it, the drawing board 1
2. By eliminating irregularities on the central surface, the surface of the drawing board 12 can be adjusted to form a strictly uniform arc shape.

FIG. 6 shows another preferred embodiment of the height difference correction mechanism of the present invention, and specifically shows a side view of the area around the drawing board. The embodiment shown in this figure will be described below.

The height difference correction mechanism shown in the figure includes a flat drawing board 12 and a base 3 below it, which has a structure similar to that of the plotter shown in FIGS. 1 to 4.
An adjusting means 3 having the same structure as the adjusting means 34 shown in FIG.
4 are interposed diagonally in the vertical direction. Specifically, the upper and lower end surfaces of the adjusting spacer 64 of the adjusting means 34 are cut diagonally, and the spacer 64 is
The upper and lower end surfaces of the drawing board 12 and the frame member 36
b surface and are brought into contact with each other without any gaps. At the same time, the bolt 5 loosely fitted with the adjustment spacer 64
2 is extended diagonally between the back surface of the drawing board 12 and the frame member 36b in the vertical direction. And bolt 5
2. Tighten or loosen the adjusting nut 58 screwed around the lower end of the frame member 36 of the base 32.
Adjustment spacer 6 sandwiched between b and drawing board 12
The length of the adjustment spacer 64 can be compressed or extended by adjusting the clamping force of the spacer 4 to be strong or weak.

The rest of the structure is the same as the height difference correction mechanism of the plotter shown in FIGS. 1 to 4 above.
Its operation is similar to that of the height difference correcting mechanism of the plotter shown in FIGS. 1 to 4, and the same members are designated by the same reference numerals and their explanation will be omitted.

[Effect of idea]

As explained above, according to the height difference correction mechanism of the present invention, simply by tightening or loosening the adjustment nut, the length of the adjustment spacer held between the drawing board and the base can be shortened or pressed once. By lengthening the length of the shortened adjustment spacer, it is possible to increase or decrease the distance of the drawing board portion mounted on the base via the adjustment spacer with respect to the base. Then, the unevenness on the surface of the drawing board portion can be eliminated, and the entire surface of the drawing board can be kept flat.

[Brief explanation of the drawing]

1 is a side sectional view of the area around the drawing board of a flatbed plotter equipped with a height difference correction mechanism on the surface of the drawing board according to the present invention; FIG. 2 is an enlarged front sectional view of the area around the fixing means of FIG. 3 is an enlarged front sectional view of the vicinity of the adjustment means in FIG. 1, FIG. 4 is a plan view of the base of the flatbed plotter shown in FIG. 1, and FIG. Fig. 6 is a side view of the area around the drawing board when a flatbed plotter is equipped with the drawing board surface height difference correction mechanism of the present invention. FIG. 7 is a side view of the drawing board and its surroundings showing another embodiment, and is a schematic diagram of the configuration of a flat bed plotter. 10... Recording paper, 12... Drawing board, 32... Base, 34... Adjusting means, 36a, 36b... Frame member, 42... Fixing means, 52... Bolt,
58... Adjustment nut, 60... Elastic body, 64...
Adjustment spacer.

Claims (1)

[Scope of utility model registration request] In a plotter in which a part of the drawing board on which recording paper is placed on the base is fixed to the base, there is no space between the drawing board and the base except for the part of the drawing board fixed to the base. , a bolt protruding from the back surface of the drawing board, an adjustment spacer loosely fitted around the bolt and at least a part of which is made of an elastic material that can be expanded and contracted up and down, and a hole provided in the base; A hole through which the bolt protrudes downwardly is inserted through the adjusting spacer, and an adjusting nut screwed around the lower end of the bolt protruding downwardly in the hole, and the adjusting spacer can be freely strengthened or weakened between the base and the drawing board. A mechanism for correcting the height difference on the surface of a plotter's drawing board, characterized in that it is equipped with an adjustment means for increasing or decreasing the distance between the drawing board and the base, which comprises an adjustment nut that is tightened to adjust the distance between the drawing board and the base.