JPH0157339B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a proposal for a so-called light table that includes a translucent base plate made of a frosted glass plate or the like, and a light source for illuminating the base plate. It is something.

As is known, in a light table, a light source is placed below the base plate, and the light source illuminates the base plate from below, making the base plate surface extremely bright. In addition to making it easier to perform tasks such as detailed writing and drawing, the work paper placed on the base plate becomes transparent, making it suitable for superimposing and aligning images on overlapping work papers, so it can be used over a wide range of applications. It's being used.

Among them, it is often used in photoengraving work. For example, it can be used as a workbench for opaque painting to fill in pinholes that appear on transparent original film photographed with a camera, and it can also be used as a workbench for opaque painting to fill in the pinholes that appear on transparent original film taken with a camera. It is also an indispensable workbench for checking whether each line is tilted or the initial letters of each line are aligned correctly in the arrangement of letters. .

Furthermore, in the work of laying out mounts, a light table is effectively used to eliminate the inclination of the characters or designs to be laid out and to achieve accurate layout.

By the way, by shining light from below the base plate, you can see through the paper placed on the base plate.
As mentioned above, it is suitable for checking whether the characters are erect and the lines are slanted (hereinafter, these tasks are collectively referred to as "character image alignment work"), but this work is currently It's next time.

In other words, place the desired work paper (for example, a film on which characters or images have been taken) on a base plate, and place a large number of parallel straight lines vertically and horizontally at minute intervals on what is usually called a layout base. (hereinafter referred to as the "base material for shaping"), which is layered on the work paper.

Then, the characters and images on the work paper can be seen through this paper alignment base material, so arbitrarily select a straight line on the paper alignment base material and use it as the alignment baseline. It is created by combining images, etc.

So, for example, if you find that a certain character is slanted and you want to correct it, first remove the alignment base material, then cut out the character part from the work paper. While making slight adjustments to the inclination, I reattached it using transparent tape, placed the base material on the work paper again, and checked to see if it was completely erect.

Even through such procedures, it is ultimately possible to achieve the work objectives. However, when making fine adjustments to the inclination, there is no physical way to check whether or not the inclination is completely erect, so this must be done by eye, making it difficult to improve the accuracy of the adjustment work and requiring redoing the work. This has become an extremely troublesome task, with the result that some people are forced to do so.

As described above, the character image adjustment work that is currently performed using a light table is not at all desirable, as the work efficiency is poor, and the work accuracy is also lacking. However, using a light table for this task may be the only best option.

Based on the above points, and as a result of various studies, the present invention has been developed to solve the current problems related to character image adjustment work by improving the light table itself so that it is suitable for character image adjustment work. I came up with the idea of arranging many parallel straight lines in the vertical and horizontal directions at minute intervals on the base plate itself, so that it corresponded to the above-mentioned base material for orthopedic surgery. However, we have come to find out that simply having this configuration will cause inconvenience in the following cases.

In other words, as mentioned earlier, the light table is suitable and indispensable for tasks such as opaque painting, which is used to fill in pinholes in transparent original film. If a large number of straight lines are arranged in the horizontal direction, the pinholes in the film will overlap on the straight lines, resulting in a major hindrance to the work.

Therefore, the present invention was devised as a result of further study taking this point into consideration.
Depending on the purpose of the work, for example, when it is preferable to have a straight line as a reference on the base plate surface, such as character image adjustment work, it is preferable to use a large number of parallel straight lines in the vertical and horizontal directions at minute intervals, or A translucent sheet on which a standard format display mark, etc. is formed is stretched over the base plate surface, and the sheet is configured so that it can be withdrawn from the base plate surface during other operations such as opaque painting. Therefore, it is possible to provide a light table that is most easy to use depending on the work content, and that simultaneously improves work efficiency and work accuracy.

The invention will now be described in detail with reference to the accompanying drawings, in which one embodiment is shown.

1 is a sheet having an area equivalent to two surfaces of a base plate made of a frosted glass plate, and on its surface, a large number of parallel straight lines 3 are printed in the vertical and horizontal directions at minute intervals, This sheet 1 can be suitably formed by using a translucent plastic sheet and printing straight lines 3 on its surface.

The front end of the seat 1 is connected to the rotating shaft 5a via a connecting string 4a, while the rear end thereof is connected to the rotating shaft 5b via a connecting string 4b.

Chain sprockets 7a and 7b on which a chain 6 is hung are attached to the ends of the rotating shafts 5a and 5b, and the chain 6 is attached to the end of the rotating shaft 80 of the reversible motor 8. Chain
It is also hooked to the sprocket 7c, and as the reversible motor 8 rotates in the forward and reverse directions, forward and reverse travel is obtained. Sprocket 7c → Chain 6 → Chain sprocket 7
a, 7b → rotation axes 5a, 5b and rotation is given,
The sheet 1 is unrolled onto the 2nd surface of the base plate and removed from the 2nd surface of the base plate.

A protruding piece 9 is attached to the side end of the tip of the sheet 1. On the other hand, when the sheet 1 is stretched over the entire surface of the base plate 2 as shown in FIG. 2, and as shown in FIG. Limit switches 10a, 1 are placed at the positions where the projections 9 come into contact when the
0b is equipped, and as shown in Figure 1,
From the state where the sheet 1 is wound up on the rotating shaft 5b and removed from the surface of the base plate 2, as shown in FIG.
To create a state in which the tape is stretched over the entire surface of the base plate 2, a switch (not shown) is operated to rotate the reversible motor 8 in the forward direction.

Then, the rotation is from the rotation axis 80 to the chain.
The sheet 1 is unwound in the direction of arrow A through the following sequence: sprocket 7c→chain 6→chain/sprockets 7a, 7b→rotating shafts 5a, 5b.

When the protrusion 9 attached to the tip of the seat 1 comes into contact with the limit switch 10a, the rotation of the reversible motor 8 is immediately stopped, and the rotation of the seat 1 by the rotating shafts 5a and 5b is caused by the arrow A.
Since unwinding in the direction immediately stops, sheet 1
is fixed in a state where it is stretched over the entire surface of the base plate 2.

On the contrary, in order to move the sheet 1 stretched over the entire surface of the base plate 2 as shown in FIG. 2 from the base plate 2 surface as shown in FIG. I'll rotate it in the opposite direction.

Then, the rotation is the same as above, the rotation axis 80
→ Chain sprocket 7c → Chain 6 → Chain sprocket 7a, 7b → Rotating shaft 5a,
5b, and the sheet 1 is rolled up in the direction of arrow B.

Then, a protrusion 9 equipped at the tip of the sheet 1
However, when it comes into contact with the limit switch 10b, the rotation of the reversible motor 8 is immediately stopped, and therefore the winding of the sheet 1 in the direction of arrow B by the rotating shafts 5a and 5b is also immediately stopped. 1 is fixed at this position, that is, at a position where it is moved away from the two surfaces of the base plate.

Since it is configured as described above, simply by operating the switch, the reversible motor 8 can be rotated in the forward and reverse directions.
The sheet 1 can be automatically and quickly stretched over the 2 sides of the base plate and removed from the 2 sides of the base plate, and therefore, when carrying out the above-mentioned character image adjustment work. In this case, if the reversible motor 8 is rotated in the forward direction, the surface of the base plate 2 will be as shown in the second figure.
Since the sheet 1 is quickly stretched and fixed, if the desired work paper is placed on the sheet 1, the straight line 3 formed on the sheet 1 can be seen through the work paper, so that the above-mentioned base for shaping can be seen. No wood is required at all, and fine adjustments such as the inclination of letters can be made while always using the arbitrarily selected straight line 3 as a reference.
It is inevitable that reliable results will be obtained in terms of work efficiency and work accuracy.

On the other hand, if the presence of this straight line 3 on the surface of the base plate 2 may hinder the work, such as when painting opaque, the reversible motor 8 can be rotated in the opposite direction, as shown in the first figure. Since the sheet 1 is automatically removed from the base plate 2, the base plate 2 is completely blank, and these operations can thus be performed properly.

Now, the so-called layout work, in which printed letters, photographs, etc. (hereinafter referred to as "layout objects") are pasted onto a mount at the required placement position, is currently done by preparing a blank sheet of an appropriate size and using it as a mount. None, so depending on each standard size (B5 size, A4 size, B4 size, etc.), for example, if the target size is A4 size,
Using a ruler and writing utensils, draw a frame that corresponds to the predetermined A4 size, then draw the necessary lines for the layout, and paste the layout object using the lines as a reference. Alternatively, the method involves purchasing a commercially available layout mount, temporarily fixing this layout mount to the base plate surface, and pasting the layout object onto this.According to the former method, the work is complicated and the workability is poor. According to the latter,
There are many problems, such as the medical burden of having to go to the trouble of purchasing expensive allocation sheets.

Therefore, in the present invention, a standard size display mark 11 corresponding to the size of each standard size is printed on the sheet 1 in addition to the straight line 3. An appropriate blank sheet of paper is temporarily fixed on the sheet 1 in line with the standard size indication mark 11 corresponding to the desired size among the standard size indication marks 11, and the standard size indication mark 11, which can be seen through the blank paper, is placed on the sheet 1. All you have to do is check the surrounding frame and paste the layout object based on the straight line 3, making it possible to carry out the layout work simply, quickly, and accurately.

Although not shown in the drawings, the sheet 1 is constructed so that it is stretched tightly over the base plate 2, and the connecting cords 4a and 4b do not interfere with the work, for example, on a light table. A narrow groove is formed on the upper surface of the base frame 12, and the connecting strings 4a, 4b are inserted into the narrow groove.
Of course, it is natural to take measures such as configuring it so that it is immersed.

[Brief explanation of drawings]

All figures show embodiments of the present invention; FIG. 1 is a top view of the light table when the sheet is removed from the base plate surface. FIG. 2 is a top view of the light table when the sheet is stretched over the base plate surface. FIG. 3 is an enlarged vertical cross-sectional view of the base plate portion taken along line A-A in FIG. 2. Explanation of symbols, 1... Sheet, 2... Base plate, 3...
Printed straight lines, 4a, 4b...connecting strings, 5a,
5b...rotating shaft, 6...chain, 7a, 7b,
7c...Chain sprocket, 8...Reversible motor, 9...Protrusion piece, 10a, 10b...Limit switch, 11...Printed standard format display mark, 12...Base frame, 13...Light diffusion Board, 30...
...Printed vertical and horizontal center lines, 80...
…Axis of rotation.

Claims (1)

[Claims] 1. A translucent sheet, on which numerous parallel straight lines and standard size display marks are formed in the vertical and horizontal directions at minute intervals, is connected to a winding mechanism at both ends, and mounted closely on the base plate surface, and the above-mentioned A light table characterized in that the translucent sheet can be stretched over the base plate surface and removed from the base plate surface by forward and reverse driving of the drive source of the winding mechanism.