JPS6230122Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an illumination device in a coordinate reader.

2. Description of the Related Art In a coordinate reader, an illumination device is known that provides overall illumination to the reading board and spot illumination to the reading section. However, since the spot illumination device was installed in the reading head, when the cord was connected to the spot illumination device, the cord was conspicuous and unsightly, and it was necessary to prevent the cord from becoming loose, making it difficult to handle the cord.

The object of the present invention is to eliminate the above-mentioned defects by arranging the overall illumination device and the spot illumination device on the back side of the reading board.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

2 is a fuselage, to which X rails 4 and 6 are fixedly installed;
A support frame 10 is mounted movably along the longitudinal direction of the X rails 4 and 6 via rollers. An X motor 12 with a speed reduction mechanism is fixed to the support frame 10, and a pinion gear 14 fixed to the output shaft of the X motor 12 is located below the drawing board 8, that is, on the back side of the drawing board 8. The guide rail 16 is fixed to the body 2 in parallel with the X rails 4 and 6, and is engaged with a rack gear 18 fixed thereto. An X pulse encoder 20 is attached to the output shaft of the X motor 12.
The input shafts of the two are connected. Reference numeral 22 denotes a fluorescent light constituting an overall illumination device attached to the fuselage 2, and the drawing board 8 is illuminated over almost the entire range of movement of the drawing board 8.
A plurality of fluorescent lights 22 are arranged on the lower side and on the back side.
Diffusion plates 24 and 26 made of acrylic plates or frosted glass fixed to the fuselage 2 are disposed above the fuselage 2. 28 is a Y rail fixed to the body 2, and a Y cursor 30 is movably mounted on this via rollers. 32 is a Y motor with a speed reduction mechanism fixed to the Y cursor 30, and a pinion gear 34 fixed to its output shaft meshes with a rack gear 36 fixed to the Y fixed rail 28. The output shaft of the Y motor 32 is connected to the input shaft of a Y pulse encoder 38. 40
is a reading head fixed to the Y cursor 30, and includes a scanner camera 42 for automatic coordinate reading and an ITV camera 44 for manual coordinate reading.
A guide rail 46 is located below the drawing board 8 and is fixed to the machine body 2 parallel to the Y fixed rail 28, and a cursor 48 is movably attached to this via a roller. A holder 52 for a light source 50 is attached to the cursor 48, a holder 56 for a condenser lens is attached to the tip of a glass fiber 54 attached to the holder 52, and the holder 56 is attached to the reading head 40.
It faces the light incident imaging lens holder 58. The light source 50, glass fiber 54 and condenser lens constitute a spot illumination device. 58, 60 and 62, 64 in Figure 4
are pulley holders located at both ends of the guide rail 46 and fixed to the body 2, and rope pulleys 66, 68, 70, and 72 are rotatably supported by these pulley holders. Rope pulleys 74 and 76 are rotatably supported at both ends of the Y fixed rail 28, and the rope pulleys 74 and 76 and the rope pulleys 66, 68, 70, and 72 have rope-shaped members made of wire as shown in the figure. The cursor 48 is connected to the rope-like member 78, and both ends of the rope-like member 78 are connected to the Y cursor 30 via attachment fittings. Note that a belt or other similar transmission member can be used as the rope-like member 78.

Next, the operation of this embodiment will be explained.

First, the power switch of the entire illumination device consisting of the fluorescent lamp 22 and the light source 50 is turned on, and the drawing board 8 is entirely irradiated with the light of the fluorescent lamp 22. XY motor 1 is controlled by the controller's motor drive signal.
2 and 32 are driven, the drawing board 8 moves to the X rail 4,
6, and the head 40 moves along the Y fixed rail 2.
8, the scanner camera 42 of the head 40 scans the drawing on the drawing board 8. Scan detection data from the scanner camera 42 and output pulse data from the XY pulse encoders 20 and 38 are supplied to the controller. The controller processes the above data and outputs, for example, the XY coordinate values of the center point of a white circle on a black background on the drawing. Further, the head 40 can be moved to a desired position on the drawing board 8 by manually operating a motor control switch provided on the keyboard of the controller. By controlling the movement of the head 40, a desired portion of the drawing on the drawing board 8 is projected onto a cathode ray tube (not shown) together with an indicator by the ITV camera 44, and the center point of the indicator is aligned with a reading point on the drawing, and the reading point is The XY coordinate values can be data-out by pressing the record button switch on the controller. When the head 40 moves along the Y fixed rail 28, the cursor 48 moves in conjunction with the head 40 due to the transmission linkage of the rope-like member 78. The light from the light source 50 is guided by a glass fiber 54 to a lens in a lens holder 56, and from this lens illuminates the drawing board 8 in a spot shape, and this spot light passes through a lens in a lens holder 58 of the reading head 40. , Scana camera 42 and ITV camera 4
The light enters the light entrance section 4. When the spot light enters the scanner camera 42, a clear optical image enters the scanner camera 42, and reliable scan data can be obtained. The wiring cord to the light source 50 is extremely easy to handle because the light source 50 is located below the drawing board 8 and is not visible from the outside. The entire area may be illuminated by the fluorescent lamp 22 only approximately on the right half of FIG. 1, with the Y fixed rail 28 as the boundary.

As described above, in the present invention, the spot lighting device is placed on the back side of the drawing board, so the electric wires connected to the spot lighting are not visible from the outside. Therefore, there is an advantage that the electric wire can be processed extremely easily.

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a vertical side view, FIG. 3 is a vertical front view, and FIG. 4 is an explanatory view. 4, 6...X rail, 8...reading map board, 12...
...X motor, 16...Guide rail, 22...Fluorescent light, 28...Y fixed rail, 30...Y cursor, 32...Y motor, 38...Y pulse encoder, 40...Reading head, 42 ...Skyana Camera, 44...ITV Camera, 48...Cursor,
50...Light source, 52...Holder, 78...Rope-shaped member.

Claims (1)

[Scope of utility model registration request] A light-transmissive reading plate 8; a reading head 40 that is disposed opposite to the front surface of the reading plate 8 and can be relatively driven in a desired direction in a plane parallel to the reading plate 8; A coordinate reader comprising: an illumination device that illuminates a wide range of the back side of the reading map board 8; and a spot lighting device that illuminates a part of the back surface of the reading map board 8. A coordinate reader characterized in that the spot illumination device is arranged opposite to the reading head 40, and the spot illumination device and the reading head 40 are connected to each other so as to move in the same direction and by the same amount. lighting equipment.