JPS63155138A - Masking unit for image projecting device - Google Patents

Abstract

PURPOSE:To improve the operability of a masking unit itself for an X and a Y adjusting shaft and an image projecting device by arranging the X and Y adjusting shafts of an X and Y mask members slantingly in an X direction and arranging respective mask edges as prescribed. CONSTITUTION:The X and Y adjusting shafts 26 and 27 are arranged at a specific angle theta except 90 deg. to the X direction and the X mask member 19 has mask edges 31 and 32 at an angle obtained by subtracting the specific angle thetafrom 90 deg. to the X adjusting shaft 26. The Y mask member 20 has mask edges 36 and 37 at the prescribed angle theta to the Y adjusting shaft 27. Therefore, when the X direction which is the conveyance direction of a roll film F is slanted forth or back to the front of the image projecting device, the specific angle theta is set to an angle for correcting the inclination and the X and Y adjusting shafts 26 and 27 are at 90 deg. to the front, so adjusting operation using their knobs, etc., is accurately performed on the front side. Consequently, the operability of the masking device itself and the general operability of the image projecting device are improved.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a masking method used in an image projection device that irradiates a roll film with light from a light source and enlarges and projects the image of the roll film onto an image receptor through a light path. Regarding equipment.

That is, the present invention relates to a masking device that is used in an image projection device such as a reader or reader printer that enlarges and projects an image on a roll of microfilm, and is used to project only a desired area of the image.

``Prior Art'' For example, when microfilm, which is a roll film, is used for check operations at a bank, a large amount of information is captured as images at a high reduction rate on one microfilm. The image on the microfilm is projected onto a screen using a reader/printer or the like to view and check the information, and if necessary, is projected onto a photoreceptor to copy the information.

In the image projection apparatus used for such purposes, a masking device is incorporated in order to project, view, and especially copy only a desired area of the image. By placing this masking device in the optical path,
Projection, viewing, copying, etc. of a desired area of the image will be performed.

"Problems to be Solved by the Invention" By the way, as such a masking device, an X
It has a mask member and a Y mask member, and these X
When a configuration is adopted in which the mask member and the Y mask member also have attachment portions attached via the X adjustment axis and the Y adjustment axis, respectively, the following will occur.

That is, in this case, by adjusting the X and Y adjustment axes, the X and Y mask members are moved so that only the desired area of the image is projected, viewed, and copied. And the relevant X, Y
The adjustment axis is arranged at an angle of 90 degrees with respect to the X direction, and the mask edge of the X mask member is parallel to the X adjustment axis, and the mask edge of the Y mask member is arranged at an angle of 90 degrees with respect to the Y adjustment axis. In view of the technical background of the field, a configuration formed by forming an angle of degrees is generally adopted.

However, with such a configuration, the following problem will be pointed out.

Firstly, unlike the usual case, if the carrier part of the roll film is installed tilted back and forth with respect to the front of the image projection device such as a reader printer, etc.
When the conveyance direction of the roll film, which is the X direction, is also tilted, the following will occur. In other words, in this case, as described above, the X and Y adjustment axes are also tilted back and forth with respect to the front of the image projection device, and therefore adjustment operations using the knobs and the like are also performed obliquely, so such operations are difficult. It will be tiring and bothersome.

Secondly, on the contrary, as usual (see Figure 10 below),
If the carrier part, X direction, etc. are in front of the image projection device,
Even if the device is not tilted but is arranged along this direction, the following points should be pointed out. That is, in this case, as mentioned above, the X and Y adjustment axes and the optical path position are rarely
It will always be placed in the center of the front of the image projection device, and due to the presence of the knobs for the X and Y adjustment axes, the general operation box etc. of the device located in the center of the front (
(See Figure 10) may be difficult to operate and may get in the way.

In view of the above circumstances, the present invention has been made to solve the problems of the above-mentioned conventional examples.

By arranging the X and Y adjustment axes of the Y mask member so as to be inclined with respect to the X direction, and by arranging each of the mask edges in a predetermined manner, on the one hand, the operation of the masking device itself such as the X and Y adjustment axes is facilitated. The object of the present invention is to propose a masking device for an image projection device, which improves the performance and, on the other hand, also improves the general operability of the image projection device.

"Means for Solving the Problems" The technical means of the present invention to achieve this objective are as follows.

This masking device is used in an image projection device that irradiates a roll film with light from a light source and enlarges and projects an image on the roll film onto a receiver through an optical path.

An X mask member and a Y mask member that variably block the optical path from the X direction, which is the transport direction of the roll film, and the Y direction, which is the width direction of the roll film, and these X mask members and Y mask members, respectively, It has a mounting portion attached via the shaft and the Y adjustment shaft.

Here, the X adjustment axis and the Y adjustment axis are arranged at a predetermined angle θ excluding 90 degrees with respect to the X direction. Further, in the X mask member, the mask edge forms an angle with respect to the X adjustment axis, which is 90 degrees minus the predetermined angle θ. In the Y mask member, the mask edge forms a predetermined angle θ with respect to the Y adjustment axis.

"Function" Since the masking device of the image projection apparatus according to the present invention is comprised of such means, it functions as follows.

In an image projection device, a roll film is irradiated with light from a light source, and the image is enlarged and projected onto a receiver through an optical path.

The optical path is variably blocked from both the X and Y directions by the combination of the X mask member and the Y mask member of the masking device. In this way, the desired area of the image is projected, viewed, and in particular copied.

Here, the X adjustment axis and the Y adjustment axis are inclined at a predetermined angle θ with respect to the X direction.

First, when the X direction, which is the transport direction of the roll film, is tilted back and forth with respect to the front of the image projection device, the following will occur.

In other words, in this case, the predetermined angle θ is set to an angle that corrects the inclination, and the X adjustment axis and the Y adjustment axis are at 90 degrees with respect to the front, so the adjustment operation using the knob etc. is also accurate. You can now do it from the front.

Second, contrary to the above, in the case where the X direction is not inclined with respect to the front of the image projection device but is disposed along this direction, the following will occur.

That is, in this case, the X adjustment axis and the Y adjustment axis allow the knobs and the like to be disposed toward the side portions of the front surface rather than the central portion.

Although the X adjustment axis and the Y adjustment axis are tilted with respect to the X direction in this way, the mask edges of the and the predetermined angle θ
is doing. Therefore, each mask edge accurately masks the image from the X direction and the Y direction.

"Embodiments" The present invention will be described in detail below based on embodiments shown in the drawings.

First, the configuration etc. will be explained in the following order: an overview of the reader printer, the overall configuration of the masking unit, etc., the masking device, and the inclination of its adjustment axis.

The outline of the reader printer, which is an image projection device, is as follows.

FIG. 10 is an external perspective view showing an example of a reader printer, and FIG. 11 is a front explanatory view of a roll film carrier section, etc.

First, we will discuss the carrier section attached to the front of the reader printer. The cartridge 2 is inserted into the carrier section 3 through the insertion port 1 and loaded into its housing (not shown). The microfilm F, which is a long film wound into a roll on a reel 4 in the cartridge 2, is first moved by a feeding device (not shown) to a feeding roller 5, which is rotated by a feeding device (not shown). will be sent to. There, the sheet-shaped microfilm F is sent to a feed roller 5, an encoder roller 6, a pair of transparent plates, an upper glass 7 and a lower glass 8. It is wound up again on the spool 10 via the guide roller 9 and the like. As a result, the microfilm F is moved by the drive motors connected to the reel 4 and the spool 10, respectively.
It will be in a state where it can be freely transported in forward and reverse directions.

Incidentally, when the conveyance of the microfilm F is stopped, the upper glass 7 and the lower glass 8 are pressed against the corresponding images from above and below. Further, 11 is an auxiliary roller located opposite to the feed roller 5, 12 is an auxiliary roller located opposite to the encoder roller 6, and 13 is a guide plate for guiding the microfilm F being conveyed.

Next, we will discuss the optical path. Light from a light source such as a lamp 14 passes through a reflection mirror 15 and is focused by a condenser lens group 16, and then irradiates the microfilm F located between the upper glass 7 and the lower glass 8, thereby creating an image on the microfilm F. will be enlarged and projected by the projection lens 17.

In the reader mode, an image is projected onto a screen S in front of the image receptor for viewing.

In the print mode, an image is projected and exposed onto a photoreceptor (not shown) inside the image receptor, processed to form an image by a known process, and copied onto copy paper.

Therefore, the operator operates the operation box B1 attached to the reader printer via a cord and the operation box B2 provided at the center of the front of the main body to drive the drive motor in forward and reverse rotation, and perform forward and reverse transport. The desired image is searched for on the microfilm F, and the desired image is placed on the upper glass 7.
, the image is stopped at a position facing the lower glass 8, viewed on the screen S, and copied onto copy paper by performing necessary operations.

A reader printer generally looks like this.

The masking unit and masking device will be explained below.

FIG. 1 is a plan sectional view of the embodiment, FIG. 2 is a schematic perspective view thereof, and FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2.

First, the overall configuration of the masking unit 18 and the like will be explained.

This masking unit 18 is arranged along a transparent plate such as an upper glass 7 that is pressed against a film such as a microfilm F, and is arranged along the upper glass 7 to direct the optical path in both the X and Y directions, such as a roll film such as a microfilm F. an X mask member 19 and a Y mask member 20 that variably block from both sides of the X direction, which is the transport direction of the microfilm F, and the Y direction, which is the width direction of the microfilm F, which is perpendicular to the X direction, and
These upper glass 7, X mask member 19. Y mask member 2
0 is attached, and also has an attachment part 21 which is detachable from the carrier part 3.

Next, each of these members will be explained in detail. As a transparent plate,
In the illustrated example, the upper glass 7 is used, but the lower glass 8
You may also use

The X mask member '19 and the Y mask member 20 are both made of a light-shielding plate, film, etc., and as described later, together with the mounting part 21 and the like constitute a masking device 22, and are located in the optical path leading to the projection lens 17. , are arranged to face each other along the upper surface of the upper glass 7.

Note that, without relying on this illustrated example, it may be arranged along the lower surface of the upper glass 7, further, the upper surface of the lower glass 8, the lower surface of the lower glass 8, etc.

In the illustrated example, the mounting portion 21 includes a frame 23 serving as a frame body, and a cover 24 provided on the upper surface of the frame 23. An aperture 25 is formed in the center of the cover 24, and this aperture 25 is connected to the projection lens 17.
, and the optical path is formed. The upper glass 7 is attached to the lower surface side of the attachment portion 21.

Also, the cover 24 of the mounting portion 21. An X mask member 19 and a Y mask member 20 are disposed between the aperture 25 and the upper glass 7, and are attached to the frame 23 of the mounting portion 2 by an X adjustment shaft 26 and a Y adjustment shaft 27, respectively.

Further, the attachment portion 21 is detachably attached between the guide plates 13 of the carrier portion 3 facing each other via the optical path. That is, as shown in FIG. 2, approximately Z-shaped holding members 28 are fixed to the ends of both guide plates 13, and both holding members 2
The mounting portion 21 is inserted into the eight equal spaces from the Y direction and is mounted. Reference numeral 29 denotes a stopper bin for positioning the attached mounting portion 21.

Note that the carrier portion 3 of such a masking unit 18
When the masking unit 18 is removed, that is, when it is not in use, the upper glass 7 and its mounting member, which are formed to the same thickness as the masking unit 18, are prepared in advance, and instead of the masking unit 18, the upper glass 7 and its mounting member are prepared in accordance with the above-described manner. It is inserted and installed between the holding members 28 of the carrier part 3.

The overall configuration of the masking unit 18 and the like is as described above.

Next, the masking device 22 will be explained in detail.

The masking device 22 includes an X mask member 19. Y mask member 20, and the mounting portion 21. X adjustment axis 26. It has a Y adjustment shaft 27 and the like.

It should be noted that the mounting portion 21 may have the following configurations other than those described above. That is, the attachment part 21 is fixedly attached to the carrier part 3, and a non-unitized type is also possible.

Further, the mounting portion 21 may be of a type in which neither the upper glass 7 nor the lower glass 8 is attached.

Then, the X mask member 19
A first member 33 and a second member 3 in which mask edges 31 and 32 parallel to each other are movable symmetrically with respect to 0.
It is equipped with 4.

Further, the Y mask member 20 includes a third member 38 and a fourth member 39, in which mask edges 36° 37 parallel to each other are movable symmetrically with respect to a preset Y center line 35. ing. Although the Y center line 35 is movable in the Y direction, the X center line 30 may also be movable in the X direction.

Here, the X mask member 19 and the Y mask member 19 of the masking device 22
The mask member 20 will be explained in detail.

First, the X mask member 19 will be described with reference to FIG. That is, the X adjustment shaft 26 has its base end inserted through the opening 40 formed in the frame 23 of the mounting part 21, and is rotatably held by both stoppers T so as not to be able to move forward or backward. The tip has a thread carved in the middle with a reverse thread. A bearing 41 having a thread that engages with the screw is screwed onto the one-directional screw on the base end side, and this bearing 41 is fixed to the first member 33. Further, a bearing 42' having a screw thread that engages with the screw is screwed into the oppositely directed screw on the distal end side, and this bearing 42 is fixed to the second member 34.

Therefore, by rotating the knob 43 fixed to the base end of the X adjustment shaft 26, for example, in the clockwise direction a, the
The adjustment shaft 26 rotates in the same direction, and the first member 3
3 and the second member 34 move substantially diagonally upward and substantially diagonally downward in the drawing, respectively, as shown by directions a and a in FIG. 4, respectively. Therefore, each mask edge 31.
32 will move toward each other toward the X centerline 30. Note that the movement of the first member 33 and the second member 34 is performed by being guided by the inner surface of the frame 23 directly or indirectly. Now, for example, as shown in Fig. 5, on the screen S which is the image receptor,
With respect to the projected image P, a mask area M indicated by diagonal lines,
However, it must be narrowed from both the left and right sides (it will be moved in the directions a and a, respectively).

Further, when the knob 43 is rotated in the counterclockwise direction a', the first member 33 and the second member 34 are moved to the position a shown in FIG.
As shown in the force directions ' and a', they move approximately diagonally downward and approximately diagonally upward in the drawing, respectively. Therefore, each mask edge 31, 32 has an X center line 30
move away from each other. Therefore, as shown in FIG. 5, on the screen S, the mask area M is
is moved in the a' and a' force directions, respectively, in order to spread it to both the left and right sides.

Next, the Y mask member 20 will be described with reference to FIG. That is, the base end of the Y adjustment shaft 27 is inserted through a bearing 44, and is held rotatably under both stoppers so that it cannot move forward or backward. It is attached in a penetrating state into the opening 45 that is formed.

The Y adjustment shaft 27 has a configuration similar to the X adjustment shaft 26 described above. In other words, the tip of the Y adjustment shaft 27 has a thread threaded in the middle with a reverse thread, and the one-way thread on the base end is a bearing with a thread threaded thereon to engage with the thread. 46 is screwed, and this bearing 46 is fixed to the third member 38. In addition, a bearing 47 is provided with a screw threaded in the opposite direction screw on the tip side.
is screwed on, and this bearing 47 is fixed to the fourth member 39.

Therefore, by rotating the knob 48 fixed to the base end of the Y adjustment shaft 27, for example, in the clockwise direction b, the Y
The adjustment shaft 27 rotates in the same direction, and the third member 3
8 and the fourth member 39 move substantially diagonally upward and substantially diagonally downward in the drawing, respectively, as shown in the directions b and b in FIG. 6, respectively. Therefore, each mask edge 36.
37 will move toward each other toward the Y centerline 35. Note that the movement of the third member 38 and the fourth member 39 is performed while being guided by the inner surface of the frame 23. Now, as shown in FIG. 7, for example, on a screen S serving as an image receptor, a mask area M indicated by diagonal lines narrows the projected image P from above and below.

They will each be moved in the b direction.

Further, when the knob 48 is rotated in the counterclockwise direction b', the third member 38 and the fourth member 39 are moved in the direction b' as shown in FIG.
As shown in the force directions ' and b', they move approximately diagonally downward and approximately diagonally upward in the drawing, respectively. Therefore, each mask edge 36,37 corresponds to the Y center line 35.
move away from each other. Therefore, as shown in FIG. 7, on the screen S, there is a mask area M for the image P.
is moved in the upper and lower b' and b' force directions, respectively, in order to spread it out.

Next, an example of a mechanism for moving the Y center line 35 will be described. As described above, the Y adjustment shaft 27 is inserted through and held by the bearing 44, and this bearing 44 is attached to the opening 45 of the mounting portion 21 in a penetrating state.

That is, to explain this point in detail, the outer peripheral surface of the bearing 44 is threaded, and the outer thread of the bearing 44 is threaded into the opening 4.
It is threadedly engaged with the internal screw threaded at 5-.

Therefore, by rotating a knob 49 fixed to the base end of the bearing 44, for example, in the clockwise C direction, the bearing 44 can be rotated.
4 rotate in the same direction, and move forward substantially obliquely upward in the drawing with respect to the opening 45 of the mounting portion 21 into which they are screwed together. Therefore, as shown in FIG.
7. The third member 38 and the fourth member 39 are also
The direction of movement is approximately diagonally upward in the drawing. As a result, the Y center line 35 is moved upward. Note that, of course, the spacing between the mask edges 36 and 37 remains unchanged in this case. Now, for example, as shown in FIG. 7, on the screen S serving as the image receptor, the mask area M is
is moved entirely upward in the direction C in the drawing while maintaining a predetermined interval.

Further, when the knob 49 is rotated counterclockwise in the C' force direction, the bearing 44 quickly moves substantially diagonally downward in the drawing with respect to the opening 45 of the mounting portion 21. Therefore, as shown in FIG. 6, the Y adjustment shaft 27. The third member 38 and the fourth member 39 are also moved substantially diagonally downward in the drawing in the C' force direction, and the Y center line 35 is moved downward. Therefore, as shown in FIG. 7, on the screen S, the mask area M with respect to the image P is moved entirely downward in the direction of force C' shown in the figure while maintaining a predetermined interval.

The masking device 22 has this structure.

Next, the inclination of the adjustment shaft etc. provided in the masking device 22 will be explained.

The X adjustment shaft 26 and the Y adjustment shaft 27 are arranged at an angle of 90° with respect to the X direction.
They are arranged at a predetermined angle θ excluding degrees. In addition, the X mask member 19 has mask edges 31 and 32 aligned with this X adjustment axis 2.
6, it forms an angle obtained by subtracting the above predetermined angle θ from 90 degrees. The Y mask member 20 has mask edges 36 and 37.
forms the predetermined angle θ with respect to the Y adjustment axis 27.

First, this predetermined angle θ will be described. The respective axes of the X adjustment axis 26 and the Y adjustment axis 27 are parallel to each other, and are tilted by a predetermined angle θ, such as 60 degrees, excluding 90 degrees, with respect to the X direction, which is the transport direction of the microfilm F, which is a roll film. ing. The value of this predetermined angle θ is set, for example, as follows.

That is, first, when the carrier section 3, that is, the The adjustment shaft 26 and the Y adjustment shaft 27 are set at angles that are adjusted to form 90 degrees with respect to the front.

For example, if the X direction is tilted 30 degrees counterclockwise with respect to the front, the X adjustment shaft 26 and Y adjustment shaft 27
It is 60 degrees, which is the value obtained by subtracting 30 degrees from the degree, and is further tilted counterclockwise with respect to the X direction. This 60 degrees becomes the value of the predetermined angle θ.

Second, the carrier portion 3. If the X direction, etc. is not tilted forward or backward, the following settings are made. In other words, as shown in FIG. 10, in a normal case, the general operation box B2 of the image projection device is arranged in the central part of the front surface.
There may be cases where the X adjustment axis 26 and the Y adjustment axis 27 of other installed members/devices are set at angles that should be avoided.

For example, if the angle required to avoid the central operation box B2 and arrange the knobs 43, 48, and 49 on the side parts is 60 degrees, then the X adjustment axis 26 and the Y adjustment axis 27 will be tilted from the X direction. This 60 degrees becomes the value of the predetermined angle θ.

Next, mask edges 31, 32, and mask edges 36
．． Let's talk about the slope of No. 37. The first part of the X mask member 19
The member 33 and the second member 34 have a portion along the X adjustment axis 26 tilted at a predetermined angle θ, and a portion along the X adjustment axis 26 that is inclined at a predetermined angle θ.
90 degrees minus a predetermined angle θ. Therefore, the mask edges 31 and 32 are arranged in the Y direction, which is perpendicular to the X direction, as expected.

Also, the third member 38 and the fourth member 39 of the 7729 member 20
consists of a portion along the Y adjustment axis 27 tilted at a predetermined angle θ, and a portion provided with mask edges 36 and 37 tilted in the opposite direction by a predetermined angle θ with respect to the Y adjustment axis 27. Therefore, the mask edge 36.37 is as expected,
It becomes a direction.

The inclinations of the adjustment shafts etc. are as follows.

The above is an explanation of the configuration, etc.

Next, the operation etc. will be explained.

The microfilm F, which is a roll film loaded in the carrier section 3, is irradiated with light from a light source such as the lamp 14. By switching the optical path, the image P on the microfilm F is enlarged and projected onto a screen S, which is an image receptor, for viewing, and is projected and exposed onto a photoreceptor, which is an image receptor, to be copied.

The masking unit 18 is set as necessary by attaching the mounting portion 21 to the carrier portion 3. Then, by a combination of the X mask member 19 and the Y mask member 20 that constitute the masking device 22, the optical path is variably blocked from the X direction and the Y direction, so that the desired area of the image P can be projected, viewed, and copied. It turns out.

FIG. 8 shows a microfilm F with a blip mark B imprinted on the channel part along with an image P.
The projection state on the screen S is shown in FIG. 9, in which each image P1. P2 shows the projection state on the screen S of the microfilm F, which is a duo film with pupil shadow. The following description will be made with reference to these drawings.

First of all, the overall operation of the masking unit 18 will be explained.

In this masking unit 18, the X mask member 1
9 and the Y mask member 20 are arranged along a transparent plate such as the upper glass 7 that is pressed against the microfilm F. Therefore, this X mask member 19 and Y mask member 20
In this case, the microfilm F is directly masked in the vicinity of the microfilm F in the optical path.

Therefore, the boundary line between the desired area of the projected image P and the mask area 14M is at the mask edges 31.32 and 36.37.
This results in extremely clear and sharp masking.

Also, this masking unit 18 has a mounting part 21 that allows
It is removably attached to, for example, between the guide plates 13 of the carrier section 3 of an image projection device such as a reader printer.

Therefore, it can be installed and removed freely, and its maintenance, use, etc. are also easy.

The overall operation of the masking unit 18 is as follows.

Second, masking by the masking device 22 will be explained.

In this masking device 22, the X mask member 19
The first member 33 and the second member 34 are aligned with a preset X center line 30 by rotating the knob 43 of the X adjustment shaft 26.
On the other hand, the mask edges 31 and 32 can be moved equally and symmetrically in the X direction.

Further, the third member 38 and the fourth member 39 of the 7729 member 20 are adjusted to their mask edges 36.3 with respect to the preset Y center line 35 by rotating the knob 48 of the Y adjustment shaft 27.
7 are arranged in a row (moveable) evenly in the Y direction.Furthermore, the Y center line 35 itself, which serves as a reference, is also movable in the Y direction by rotating the knob 49.

Therefore, when the desired area of the image P is changed according to needs, the first . Second members 33, 34 and third and fourth members 38.3
9 and move each mask edge 31, 32 and 36 .
By moving 37, a desired area of image P can be easily followed.

For example, in the example of Figure 8, each image P shown in Figure (1)
And in the blip mark B, the unnecessary part is masked by the mask area M, so that only the desired area in the image P is covered by the image receptor, for example, the screen S, as shown in FIG.
is enlarged and projected.

In the example of FIG. 9, each image P1. in the upper and lower two columns shown in FIG. Once the shape and size of the mask area M are set for P2 by rotating the knobs 43° and 48,
Afterwards, the Y center line 35 can be moved up and down by only rotating the knob 49, and the mask area M can be shifted by moving only the position up and down as shown in Figures (2) and (3). The response is smooth and the operability from this aspect is excellent.

As described above, in this masking device 22, it is possible to arbitrarily and freely move, change, and set the shape, size, and zero position of the mask area M corresponding to a desired area of the image P. Become.

Furthermore, this can be achieved with a simple configuration, easy adjustment, and accuracy.

Masking by the masking device 22 is performed in this manner.

Thirdly, the operation of tilting the adjustment shaft in the masking device 22 will be explained.

In the masking device 22, the X adjustment shaft 26 and the Y adjustment shaft 27 are arranged at a predetermined angle θ excluding 90 degrees with respect to the X direction.

Therefore, first, the X
When the direction is tilted back and forth, the situation is as follows. That is, in this case, the predetermined angle θ is set to an angle that corrects the inclination, so that the X adjustment axis 26 and the Y adjustment axis 27 form 90 degrees with respect to the front. Therefore, the rotation operation of the knobs 43, 48, and 49 can be performed accurately from the front side.

Second, contrary to the above, X
Even in cases where the direction is not inclined and is arranged along this direction, the following cases can be considered. That is,
As shown in FIG. 10, in the normal case, the X adjustment shaft 26 and the Y adjustment shaft 27 are
etc. can be placed facing the side part instead of the central part of the front. The predetermined angle θ is such that the general operation box 82 of the device arranged at the center of the front side is
6 and the Y adjustment axis 27 are set at angles that should be avoided. Therefore, rotation operations of the knobs 43, 48, 49, etc. can be performed without interfering with operations of the operation box 82, etc.

Note that the X adjustment axis 26 and the Y adjustment axis 27 are
Although it is tilted at a predetermined angle θ in the direction, the X mask member 19
and each mask edge 31.32 and 36.37 of the Y mask member 20 is connected to the X adjustment axis 26 and Y adjustment axis 2.
7, the predetermined angle θ is the angle obtained by subtracting the predetermined angle θ from 90 degrees, respectively.

Therefore, each mask edge 31, 32 and 36° 37 is
Masking is performed on the image P accurately from the X direction and the Y direction as expected.

This is how the tilting of the adjustment shaft operates.

The above is the explanation of Saku9jJ etc.

"Effects of the Invention" As explained above, the masking device of the image projection apparatus according to the present invention is arranged so that the X, Y adjustment axes of the X, Y mask member are
By arranging the masking device so that it is tilted in the direction and by arranging each mask edge in a predetermined manner, on the one hand, the operability of the masking device itself such as the X and Y adjustment axes is improved; This will also improve the operability. That is, when the transport direction of the roll film is tilted, X.

The knobs on the Y adjustment axis can be adjusted accurately from the front side, making the operation reliable and easy.On the other hand, when the transport direction of the roll film is not tilted, the knobs on the It is also possible to place it on the side part of the front, which may make it easier to operate the general operation box of the image projection device located in the center, and masking can be performed accurately. The effects it produces are significant and remarkable.

[Brief explanation of the drawing]

FIG. 1 is a plan cross-sectional view showing an embodiment of the present invention. Second
The figure is a schematic perspective view showing the attached state. FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2. FIG. 4 is a plan view showing the X mask member, and FIG. 5 is an explanatory diagram of its masking operation. FIG. 6 is a plan view showing the 7729 member, and FIG. 7 is an explanatory diagram of its masking operation. FIG. 8(1) is a plan view of a main part of an example of a microfilm, and FIG. 8(2) is an explanatory diagram of a masking operation for this. Figure 9 (1) is a plan view of the main part showing another example of the microfilm;
) and (3) are explanatory diagrams of the masking operation for this. FIG. 10 is an external perspective view of the reader printer. FIG. 11 is an explanatory front view showing the carrier portion. 14... Lamp (light source) 19... X mask member 20... 7729 member 21... Mounting part 22... Masking device 26... X adjustment axis 27... Y adjustment axis 31...・Mask edge 32... Mask edge 36... Mask edge 37... Mask edge F... Micro film (roll film) P, pl, P2... Image S... Screen (receptor) X... X direction Y...Y direction θ...predetermined angle Fig. 2 /18 Fig. 3, 18 Fig. 8

Claims (1)

[Scope of Claims] A masking device used in an image projection device that irradiates a roll film with light from a light source and enlarges and projects an image of the roll film onto an image receptor through an optical path, an X mask member and a Y mask member that variably block the X direction, which is the transport direction of the roll film, and the Y direction, which is the width direction of the roll film; and a mounting portion attached through the X mask member, the X adjustment axis and the Y adjustment axis are arranged at a predetermined angle θ excluding 90 degrees with respect to the X direction, and the X mask member has a The mask edge forms an angle with the X adjustment axis that is 90 degrees minus the predetermined angle θ, and the Y mask member forms the predetermined angle θ with the mask edge Y adjustment axis. Masking device for image projection device.