JP2006192606A - Drawing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drawing device which can draw letters, graphics and the like on a three-dimensional curved surface. <P>SOLUTION: A mounting portion 21 is provided on the top face of a workpiece support 20. A core 1 as the workpiece is mounted to the mounting portion 21 in a positioned condition. A robot 30 having a mounting portion 36 is installed in the vicinity of the workpiece support 20. The robot 30 can three-dimensional spatially move the mounting portion 36. An inkjet head 40 is attached to the mounting portion 36. By jetting ink from the inkjet head 40 while moving the mounting portion 36 on a prescribed route along the top face of the core 1, the drawing device draws letters, graphics, lines on the top face of the core 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drawing apparatus suitable for drawing lines, characters, symbols and the like on a surface of a workpiece having a three-dimensional curved surface.

  Generally, hooks and other various parts for attaching the core material to the ceiling portion of the vehicle body are attached to the core material of the vehicular ceiling interior product. In order to attach such various components to the core with high positional accuracy, a ruled line indicating the mounting position of the component, an arrow indicating the orientation of the component, and the like are drawn in advance on the surface of the core. And after deciding the position and direction of a component with a ruled line and an arrow, each component is fixed to a core material.

  Conventionally, one of the following two methods has been adopted as a method of drawing ruled lines and arrows on the surface of the core material. The first method is that a concave or convex portion corresponding to a ruled line or arrow is formed on the surface of a mold for molding the core, and a ruled line or the like is drawn on the surface simultaneously with the molding of the core. Is. In the second method, a core material is fixed on a support base, and a template is set thereon. After that, a ruled line or the like is drawn on the surface of the core material by moving the pencil or ballpoint pen in contact with the reference surface of the template.

  In the first method, a ruled line or the like can be drawn with high positional accuracy, but the ruled line or arrow is only shown with irregularities, and the color of the ruled line or the like is the same as the background color of the core material. Therefore, there is a problem that it is difficult to identify a ruled line. On the other hand, in the second method, a ruled line or the like is drawn in a color different from the ground color for the core material, which is advantageous in that it is easy to identify, but it is difficult to accurately align the template, Therefore, there has been a problem that the position error of the ruled lines and the like becomes relatively large. In addition, when using a template, there is a problem that ruled lines have to be manually made, and the worker's fatigue is great.

  Therefore, the applicant has considered that a ruled line or the like is drawn on the core using a robot. That is, the robot has a ball-point pen, and the robot is numerically controlled to draw a ruled line or the like on the core. However, the surface of the core material is a three-dimensional curved surface, and there is a manufacturing error for each core material. For this reason, even if the robot is accurately controlled, it is inevitable that the ballpoint pen is separated from the surface of the core material, and there is a problem in that ruled lines and the like cannot be drawn well.

  The present invention has been made to solve the above problems all at once, and has a work support portion to which a work having a surface formed by a three-dimensional curved surface is attached with the surface facing outward, and a mounting portion. A robot capable of moving the mounting portion three-dimensionally; an ink jet head attached to the mounting portion; and an ink jet nozzle of the ink jet head facing the surface forming the three-dimensional curved surface of the workpiece. A robot control unit that controls the robot so that the inkjet head moves on the predetermined path along the three-dimensional curved surface, and when the inkjet head is moving on the predetermined path, from the inkjet head Inkjet ejection control means for ejecting ink is provided.

  According to the present invention having the above-described characteristic configuration, lines, characters, and other symbols are drawn with ink on the surface of the work. Etc. can be drawn. In addition, since the robot is controlled with respect to the workpiece positioned and fixed on the workpiece support base, it is not necessary to use a template, symbols and the like can be drawn with high positional accuracy, and the labor of the operator can be reduced. it can. Furthermore, since the inkjet head is separated without contacting the surface of the workpiece, even if there is a shape error on the surface forming the three-dimensional curved surface, a symbol or the like can be drawn on the surface of the workpiece without any problem.

The best mode for carrying out the present invention will be described below with reference to the drawings.
First, a drawing object on which a line or a symbol is drawn by the drawing apparatus according to the present invention will be described. FIG. 2 shows a core (work) 1 of a vehicular ceiling lining material. The core material 1 is constituted by a plate body having a rectangular shape in plan view. On one surface of the core material 1, first scribe lines 1 a that define the positions of the four corners of a quadrangular form (not shown) are drawn in the center, and other quadrangular forms (not shown) A second scribe line 1b that defines the positions of the four corners and the central relief is drawn at one end, and a third hook is positioned to fix the core 1 to the vehicle ceiling (see FIG. 3). The ruled line 1c is drawn outside the portion surrounded by the second ruled line 1b, and the fourth ruled line 1d for positioning another hook (not shown) different from the hook 2 is the other of the core material 1. An arrow 1e for drawing the direction of the hook 2 is drawn near the second ruled line. The ruled lines 1a to 1d are drawn with broken lines, but may be drawn with continuous solid lines.

  Next, the drawing apparatus 10 for drawing the first to fourth ruled lines 1 a to 1 d and the arrow 1 e on the core material 1 will be described with reference to FIG. 1. The drawing apparatus 10 has a base 11. A work support (work support) 20 is provided at one end of the upper surface of the base 11. A mounting portion 21 is formed on the upper surface of the work support 20. The attachment member 21 is fixed in a state where the core material 1 is positioned. Of course, the core material 1 is fixed to the attachment portion 21 with the surface on which the first to fourth ruled lines 1a to 1d and the arrow 1e are to be drawn facing upward (outside).

  A robot 30 is provided on the other end of the upper surface of the base 11. This robot 30 is provided on a base 11 so as to be rotatable about a vertical axis L1 and to be pivotable about an axis L2 whose lower end is horizontal to the upper end of the base 31. A leg portion 32, a body portion 33 provided at one end portion thereof at the upper end portion of the leg portion 32 so as to be rotatable around a horizontal axis L3, and a horizontal axis line L4 at the other end portion of the body portion 33. The arm 34 is provided so as to be rotatable about the center, and the tip of the arm 34 is rotated around the axis L5 with the axis aligned with the axis L5 extending in a direction perpendicular to the axes L2 to L4. The support shaft 35 is provided so as to be movable, and the mounting portion 36 is provided at the tip of the support shaft 35 so as to be rotatable about a horizontal axis L6 orthogonal to the axis L5. The mounting portion 36 can move in a three-dimensional space by rotating the portions 31 to 36 of the robot 30 about the axes L1 to L6. The movement of the mounting portion 36 is controlled by robot control means (not shown) such as numerical control means. The robot 30 may be any other robot that can move the mounting portion 36 in a three-dimensional space.

  An upper end portion of the inkjet head 40 is detachably attached to the lower portion of the mounting portion 36. The inkjet head 40 is a well-known one, and an ink ejection nozzle (not shown) is provided on the lower end surface of the lower part protruding downward from the mounting portion 36. A desired symbol, character, figure, or the like can be drawn by ejecting ink from the ink ejection nozzle in accordance with the movement of the mounting portion 36 (movement of the inkjet head 40). Ink ejection from the ink ejection nozzles is controlled by inkjet ejection control means (not shown).

  A tube 37 is connected to the upper portion of the mounting portion 36. In this tube 37, a connection line for electrically connecting the robot 30 and the robot control means, a connection line for electrically connecting the inkjet head 40 and the inkjet ejection control means, and a supply for supplying ink to the inkjet head 40 Tubes and the like are provided.

  When the first to fourth ruled lines 1 a to 1 d and the arrow 1 e are drawn using the drawing apparatus 10 having the above-described configuration, the core material 1 is first fixed to the mounting portion 21 of the work support 20. Next, a drawing start command is input to the robot control means. Then, the robot 30 sequentially draws the first to fourth ruled lines 1a to 1d and the arrow 1e in a predetermined order. That is, the robot 30 appropriately moves the mounting portion 36 so that the lower surface on which the nozzles of the inkjet head 40 are formed faces the core material 1 and aligns the inkjet head 40 with the scribing lines 1a to 1d and the arrow 1e. To move. In this case, the robot 30 not only moves the inkjet head 40 along the ruled lines 1a to 1d and the arrow 1e, but also has a three-dimensional upper surface on which the ruled lines 1a to 1d and the arrow 1e of the core material 1 are drawn. Since it is a curved surface, the inkjet head 40 is moved in a three-dimensional space so that the lower surface of the inkjet head 50 always maintains a substantially constant distance from the upper surface of the core material 1. The ink jet control means ejects ink from the ink jet nozzles of the ink jet head 40 when the ink jet head 40 moves along a predetermined path to draw the ruled lines 1a to 1d or the arrows 1e. The writing lines 1a to 1d and the arrow 1e are drawn sequentially.

  When the scribing lines 1a to 1d and the arrow 1e are drawn on the core material 1 using the drawing apparatus 10 described above, the core material 1 only needs to be correctly aligned and attached to the attachment portion 21, and the template or the like is completely attached. do not need. Therefore, the ruled lines 1a to 1d and the arrow 1e can be drawn with high positional accuracy. In addition, when drawing the ruled lines 1a to 1d and the arrow 1e, no manpower is required, so that the labor of the operator can be reduced and the labor can be saved. Further, the inkjet head 40 is separated from the core material 1 without contacting the core material 1. Therefore, even if there is a slight manufacturing error in the thickness, shape, etc. of the core material 1, the ruled lines 1a to 1d and the arrow 1e can be drawn without any problems.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it can change suitably.
For example, in the above embodiment, the core material 1 is a drawing target of the drawing device 10, but the drawing device 10 can draw on other objects. In addition to the ruled lines 1a to 1d and the arrow 1e, various other symbols, characters, figures and the like can be drawn.

It is a front view which shows schematic structure of one Embodiment of the drawing apparatus which concerns on this invention. It is a top view which shows the core material which is an example of the drawing object of the drawing apparatus which concerns on this invention. It is a perspective view which expands and shows the principal part of the same core material.

Explanation of symbols

1 Core material (work)
DESCRIPTION OF SYMBOLS 10 Drawing apparatus 20 Work support stand (work support part)
30 Robot 40 Inkjet head

Claims (1)

A workpiece support portion to which a workpiece having a surface formed by a three-dimensional curved surface is attached with the surface facing outward, a mounting portion, a robot capable of moving the mounting portion in three dimensions, and the mounting portion In a state where the ink jet head attached to the ink jet nozzle and the ink jet nozzle of the ink jet head face the surface forming the three-dimensional curved surface of the workpiece, the ink jet head moves along a predetermined path along the three-dimensional curved surface. A drawing apparatus comprising: a robot control unit that controls the robot; and an ink jet ejection control unit that ejects ink from the ink jet head when the ink jet head is moving on a predetermined path.

Images