JPH0472220B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an angle setting device that can easily paste a document into a document scanner when capturing a document image with a scanner.

[Background technology and its problems]

In color separation work using a scanner for printing and plate making, it is necessary to attach a color original such as a color film to the scanner's scanning drum, but at this time, the angle at which the color original is attached to the scanning drum is specified on the plate mount. must be set correctly as specified.

Setting the angle at which the document is pasted is generally referred to as angle determination, but conventionally, this angle determination has relied entirely on the operator's visual estimation. In other words, the angle of inclination of the figure drawn on the stencil was measured using a protractor, and based on that measurement, the angle of the manuscript was determined using the same protractor and then pasted onto the scanning drum.

However, this visual measurement method requires skill, is inefficient, and has low accuracy.
Moreover, it is difficult to maintain accuracy and the surface of the scanning drum is easily scratched.

By the way, like this angle adjustment, one of the pre-processing steps required before color separation using a scanner is:
There is a so-called magnification measurement operation, and a device called a magnification measuring machine is widely used for this purpose.

Therefore, a method of performing angle adjustment using this magnification measuring machine was proposed a long time ago, and has become widely adopted.

This method can be roughly divided into two types; one is a method that uses the function of the magnification measuring device as it is, and the other is a method that uses an auxiliary device added to it.

First, an example of the former will be explained using FIGS. 6 to 9.

The original is set on a magnification measuring machine, and the projected image of the original is made to match the corresponding pattern on the master mount B (FIG. 6) to measure the magnification. At this time, only the projected image of the original is rotated to match the original image while keeping the original mount B fixed at a fixed position.

Two orthogonal lines L are hand-drawn on the block mount B in line with the frame (edge) of the projected image of the original image (FIG. 7).

Remove the original F that was set in the magnification measuring machine, place it on the block mount B, align the edges of the document F with the two handwritten lines L drawn on the block mount B, In this state, a mark M indicating the horizontal position is handwritten on the edge of the document F (FIG. 8).

Using a grid film S, etc., place a horizontal mark M on the document at a predetermined position on the scanning drum D of the scanner.
The original F is pasted onto the drum D in such a manner that the original is parallel to the horizontal reference line G of the drum D (FIG. 9).

However, as described above, this method involves most of the manual work, resulting in poor work efficiency and the following drawbacks.

(b) It is difficult to maintain accuracy, which requires careful work.

(b) It is necessary to mark directly on the original film,
As a result, problems arise in manuscript management, such as dust adhesion,
There is a risk of damage.

(c) It is necessary to insert an angle reference line on the block mount (or a copy thereof), which increases the number of man-hours.

(d) Extra grid film, etc. is required, and handling thereof requires extra effort.

Next, an example of the latter method using an auxiliary device will be explained with reference to FIGS. A square ruler that can be rotated to any desired angle is provided, and this is used to set the angle of the document.This work is performed in the following steps.

A magnification measuring machine equipped with such an auxiliary device is known, for example, under the trade name "Skyana Mount" (manufactured by Dainippon Screen Co., Ltd.).

A block mount B is attached to a right-angle ruler T with pins or the like and placed on a block mount mounting table, and an image of the original picture is projected onto it to match the pattern of the block mount B and the original picture image. At this time, without moving the original, move the block base B together with the right angle ruler T, and change its position and angle to achieve a match (Fig. 10).

While keeping the square ruler T stationary, remove the document F along with its holder H, press it against the reference surface of the square ruler T, and in this state stick the document F to the square ruler T with tape or the like. (Figure 11).

Move the right angle ruler T with the original F pasted onto the transparent film M without changing its angle, and replace the original F with the film M (12th
figure).

Wrap the film M to which the original F is pasted around the scanning drum D of the scanner, and attach the original F and film M together to the scanning drum D (first
Figure 3).

Although this method eliminates the need for marking work on the block mount and manuscript, it still requires a considerable amount of manual labor and has the following drawbacks.

(b) Since it must be attached to a right-angle ruler, it is difficult to maintain accuracy using a thin paper mount, making it difficult to use for copying, and it is usually supplied drawn on cardboard. The original stencil must be used as is, making it difficult to maintain its quality.

(b) Similarly, punch holes are required on the stencil mount, which changes the stencil mount.

(c) Skill is required to maintain accuracy.

(d) There is a lot of pasting and replacing of originals, which can easily damage them.

There is a device constructed with these points in mind, as shown in Figures 14a and b (Japanese Patent Application No. 1983).
−218736). In FIG. 14a, 1 represents the entire scanner document angle setting device, 2 is a workbench, 3 is a support, 4 is a projection lens, 5 is a document holder, 6 is a lamp house, 7 is an operation control panel, 8 9 is a magnification display, 9 is an X-Y plotter, and 10 is an angle display. Incidentally, B represents a copy mount, and B represents a projected image of the manuscript.

The workbench 2 has a workpiece mount B placed on its surface so that work such as magnification measurement can be carried out efficiently, and it also functions as a stand for the entire apparatus.

The projection lens 4, document holder 5, and lamp house 6 are held together by the support 3, and the magnification measurement is performed using the surface of the copy mount B placed on the surface of the workbench 2 as the projection surface of the image of the document. It is now configuring the machine.

The original placed in the original holder 5 is illuminated by a light source provided in the lamp house 6 through an appropriate condenser lens, and a projected image of the image is projected onto the surface of the plate base B. It's summery.

Furthermore, the projection lens 4, document holding section 5, and lamp house 6 are configured to be movable up and down along the support 3, and can be moved up and down by operating a switch on the operation control panel 7, thereby causing the image of the document to be moved up and down. A projected image reduced or enlarged to an arbitrary size over a predetermined range can be formed on the surface of the block mount B.

At this time, the projection lens 3 and the block mount B
The distance between the document and the document is captured by a linear encoder or the like, and arithmetic processing is performed to determine the magnification and display it on the magnification display 8.

Therefore, if you set the original, create its projected image on the surface of the block mount B, and match it with the figure drawn on the block mount B, the magnification will automatically be displayed on the magnification display 8. obtained, and the magnification measurement can be completed. Note that such an automatic magnification measuring device is well known.

In this device, a document rotation handle 51 is provided in the color document setting section 5, and the rotation angle of the document due to the rotation of the handle 51 is detected by a rotary encoder (not shown) and given to the angle indicator 10. The angle is displayed.

However, in this device, the configuration of the document setting section 5 is such that the document F is inserted between a pair of closed-type glass plates 52a and 52b, as shown in FIG. Just setting F is quite complicated.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and
To provide an angle setting device which can sequentially set the angle of a plurality of originals with high precision, can be easily handled without requiring any skill, and can be configured at low cost.

[Summary of the invention]

In order to achieve this objective, the present invention makes the document holder section of the automatic magnification measuring machine rotatable, and also includes a plurality of elongated document clips for inserting the document with the document sandwiched in the document holder section. An angle that allows the document to be held between the document holders and rotated relative to the optical system by inserting and removing the document holder into the document holder to sequentially adjust the angle of each of the multiple documents held between the document holders. A setting device is provided.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 shows the appearance of an embodiment of the present invention, and is a diagram corresponding to FIG. 14a, where the same reference numerals indicate the same elements.

In this FIG. 1, 5' is a document holder according to the present invention, and this holder 5' includes a document clip
2' is attached. The structure except for this document holder 5' is the same as the conventional apparatus shown in FIG. 14a.

2A and 2B show the relationship between the document holder 5' and the document clip 52' in the embodiment shown in FIG. 1, and the state in which the document F is held in the document clip 52'.

As shown in FIG. After placing the original F, the other glass plate is lowered and the original is sandwiched between the two glass plates.

The original nip 52' holding the original is inserted into the original nip insertion portion of the original holder 5' as shown in FIG. The document clip 52' is supported by the document holder 5' so that it can pass through the document holder 5' from one side to the other in a direction orthogonal to the axial direction of the document holder 5'.

Therefore, the document clip 5 relative to the document holder 5'
By adjusting the insertion position of 2', the document sandwicher 5
It is possible to sequentially measure the angle of the document F sandwiched between the two parts.

FIG. 3 shows the light source box 6 and document holder 5' in the embodiment shown in FIG. 1, cut at the axial position. The central part of the configuration shown in the figure is the document holder 5', above which is the light source box 6, and below it is the lens section 4.
are provided, and are supported so as to be able to rotate as a whole around the optical axis.

The light source box 6 includes a lamp and a fan for removing heat generated by the lamp, and the lens section 4 includes a projection lens, a bellows, and the like.

The document holder 5' is supported by a support part 53 provided at the lower end of the light source box 2, and a heat ray absorbing glass 54, a Fresnel lens 55, and a diffuser plate 56 are provided at the axial position in this order from above.
A document clip 52' is inserted directly below the document clip 6.

With this configuration, the light from the lamp in the light source box 6 has its infrared component removed by the heat ray absorbing glass 54, is condensed by the Fresnel lens 55, and is then reflected by the diffuser plate 56.
The light is then diffused by the document sandwicher 52' and applied to the document sandwiched between the document clips 52'. The light that has passed through the original is projected onto the surface of the master mount B (FIG. 1) via the lens section 4.

While viewing this projected image, the operator rotates the document holder 5' about the axis as described later. In order to provide this rotational driving force and to obtain the rotation angle, a belt 57 is suspended on the cylindrical body 50 of the document holder 5', and this belt 57 is connected to a pulse motor 58 and a rotary encoder 59.
(Fig. 4).

Figures 4a, b, and c show the rotating structure of the original holder 5', with Figure 4a being a perspective view, and Figure 4b being a view of the original holder 5' from the front and cut at the optical axis position. A front sectional view, and figure c is a side sectional view.

As shown in these figures, a belt 57 wound around the cylindrical body 50 of the document holder 5' is also wound around a rotating shaft of a drive/detection mechanism having a pulse motor 58 and a rotary encoder 59. The pulse motor 58 is wired so as to be energized and rotated by operating the operation panel 7 (FIG. 1), and transmits this rotational driving force to the document holder 5' via the belt 57.
to the cylindrical body 50.

This amount of rotation is detected by a rotary encoder 59 mounted coaxially with the pulse motor 58.

FIG. 5a shows a rotation angle detection circuit of the document holder, in which detection pulses from a rotary encoder 59 are applied to the calculation section 12 via the signal input section 11. The calculation unit 12 calculates data based on pulses given through the signal input unit 11 in response to calculation commands from the operation control panel 7 (FIG. 1), and displays the results on the X-Y plotter 9 or the angle display 10. (Both figures are shown in Figure 1).

FIG. 5b is a flowchart showing the coordinate transformation process of image data. As shown in this figure, the angle values measured in the above embodiment are input into a computer (not shown) (S1), color separated under horizontal conditions (S2), input, and stored in a magnetic disk (S3). ) is subjected to rotational coordinate transformation (S4). As a result, it is possible to create tilted image data as shown on the layout designation sheet and output it to a film or the like through a scanner (S5).

Here, the coordinate transformation is performed as x ₂ y ₂ = cos θ sin θ − sin θ cos θ x ₁ y ₁ where x ₂ , y ₂ : coordinates of the tilted image x ₁ , y ₁ : coordinates of the horizontal image.

FIG. 5c shows an example of a hard copy output from the X-Y plotter 9. In the figure, P is drawn on a transparent film base such as polyester film, and R, A, and U are drawn on the base, respectively. In the straight line, R is the reference line, A is the angle specification line, and U is the orthogonal line.

Incidentally, an X-Y plotter that outputs a hard copy of a figure based on such a transparent film is well known.

Thus, the transparent hard copy outputted from the X-Y plotter 9 as shown in FIG.

Next, the method of determining the angle of a document using the angle indicating gauge Q will be explained with reference to FIG. 5a.

(a) Scan the reference line R of the angle indication gauge Q on the drum D.
In this state, only the upper end of the angle indicating gauge Q is attached to the scanning drum D.

(b) Place the original F under the angle indicator Q, place it on the surface of the scanning drum D, and align the edge of the original F with the angle indicator line A and the orthogonal line U drawn on the angle indicator Q. Perform positioning and angle adjustment.

(c) While keeping the original F in place, adhere the original F to the surface of the scanning drum D using adhesive tape or the like, remove the angle indicating gauge Q, and complete the angle setting of the original F.

Therefore, according to this embodiment, there is no need to draw any instruction lines or marks by hand, which simplifies the work and eliminates the risk of deterioration in accuracy due to handwriting, making it easy to determine angles with high precision. be able to.

Furthermore, according to this embodiment, there is no need to replace the original F at all, so there is almost no risk of staining or damaging the original F, and there is no need to make holes in the base mount B. It becomes possible to work by copying it.

[Modified example]

In the above embodiment, a pulse motor is used to rotate the document holder, but it goes without saying that this may be replaced by other electric means or a manual rotation mechanism. Further, the means for connecting the document holder and the rotation mechanism may also be other than the belt.

〔Effect of the invention〕

As described above, the present invention has a document nipper formed into an elongated shape so as to be able to sandwich a plurality of originals, and a document holder into which the document nipper is inserted, which can rotate while supporting the document nipper in a freely insertable and removable manner. With this configuration, it is possible to efficiently set the angle for each of the plurality of documents by rotating the document holder holding a plurality of documents.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the external appearance of an embodiment of the present invention, FIGS. 5c is an explanatory diagram of the original holder in the same embodiment, FIGS. FIGS. 10 to 13 are explanatory diagrams showing other examples of the work, and FIGS. 14a and 14b are diagrams illustrating an example of the angular work being performed. 1 is a diagram illustrating the configuration of a device and a document sandwicher that is a component thereof. 1... Document angle setting device, 2... Workbench, 4...
...Projection lens, 5, 5'...Original holder, 7...
Operation control panel (operation panel), 8...Magnification display,
9...X-Y plotter, 10...Angle indicator, 5
0...Cylinder, 52...Document clip, 53...Support part, 57...Belt, 58...Pulse motor, 5
9...Rotary encoder. B...Banshita mount,
D...Scaryana scanning drum, F...Document, H...
...Holder, M...Film.

Claims (1)

[Scope of Claims] 1. A scanner for inserting a document into an optical system, projecting an image of the document onto a block mount, and adjusting the angle of the document by matching this projected image with a layout instruction figure on the block mount. The document angle setting device includes: a document clip configured such that a pair of elongated transparent plates are fixed to each other so as to be openable and closable, and configured to be able to sandwich a plurality of the documents; a document holder configured to removably support the document clip and rotate according to an operation so that an image of the document can be projected onto the plate base, and a rotation angle of the document holder is detected. A document angle setting device for a scanner, comprising: a rotation angle detection means for detecting a rotation angle; and an output means for outputting a signal representing a rotation angle of the document holder based on an output of the detection means. 2. The device according to claim 1, wherein the rotation angle detection means is a rotary encoder. 3. The scanner document angle setting device according to claim 1, wherein the rotation angle detection means is connected to the document holder by a belt. 4. The device according to claim 1, wherein the document holder is rotationally driven by a pulse motor. 5. In the apparatus according to claim 1, the output means is configured to capture data in a horizontal state in advance based on the angle data from the XY plotter, which draws a reference line for determining the angle of document loading relative to the scanner, and the detection means. A document angle setting device for a scanner, which is equipped with a computer that forms an output by converting image data into coordinates.