JP3264980B2 - Film holding member in film projection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film holding member in a film projection device for projecting a film image onto an image reading device.

[0002]

2. Description of the Related Art Conventional film projectors include those shown in FIGS. That is, as shown in FIG. 8, in the film projection apparatus 10, the light emitted from the projection light source 2 together with the light reflected by the reflecting mirror 1
4, a film F in the film holding member 6 is illuminated, and a light image from the illuminated film F is projected onto the projection lens 7,
The image is projected onto a platen glass 9 of an image reading device via a Fresnel lens 8.

The film holding member 6 is slidable with respect to the film projecting device 10 as shown in FIG. 9, and each of the negative film and the positive film has its own dedicated film holding member. The two types of film holding members will be described with reference to FIGS. 10, 11, and 12. FIG. First,
In the case of a negative film, a negative film holding member 6a as shown in FIGS.
The negative film original NF is sandwiched between an upper holding plate 11 and a lower holding plate 12 which are rotatably mounted on a hinge shaft 13 at a and 12a. At this time, the longitudinal direction of the negative film original NF is abutted against the longitudinal direction positioning ribs 12c, and thus each of the negative film originals NF is positioned by the lateral direction positioning 12b whose lateral direction is a pair.

Next, in the case of a positive film, FIG.
Has a document setting section 15a for setting a positive film document 16 having a positive film PF sandwiched in a mount 16a using a positive film holding member 6b as shown in FIG. The document 16 is configured to be pressed and fixed by a pair of pressing springs 15b.

Here, in the above-mentioned negative film original and positive film original, the light and dark states of the image are in an inverting relation, and the negative film original needs to cancel the orange base color of the film itself. It is necessary to identify whether a negative film original or a positive film original has been set in the film projection apparatus, for example, because the required light amount for the original is different. For this purpose, a negative /
A positive identification button is provided, or a hole or projection is provided on one of the negative film original holding member and the positive film original holding member, and the hole or projection is detected by a detection mechanism in the film projection device to identify the negative / positive. I was

[0006]

However, in the above-mentioned conventional example, two kinds of exclusive film holding members corresponding to the negative film original and the positive film original are required. Therefore, the film holding member that is not set in the film projection device is stored in another place, and the film holding member itself may be lost or may be accidentally damaged, and at the same time, Each time the type of film original is changed, the film holding member needs to be replaced with another type, which is disadvantageous in operation. In addition, since two film holding members are required, there is a disadvantage that the cost is high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a film holding member in a film projection apparatus which can eliminate the above-mentioned drawbacks of the conventional example and can unify the film holding member into one type irrespective of a negative film original and a positive film original. .

[0008]

In order to achieve the above object, the present invention provides a negative film original or a positive film.
While holding the original on the holding plate,
In the film holding member to be set
While holding the original,
Position regulation that regulates the longitudinal direction of the negative film original at the position
Parts are provided on the holding plate at predetermined intervals, and a negative film
Along with holding the document with its position regulated,
A positive film original setting section is located at a position between the position regulating sections.
And place the positive film original in the
In the position regulation part of one of the adjacent position regulation parts.
Negative film original from the center to the center of the other position control section
The projection window is provided for a range of two frames.

[0009]

[Action] or more film holding member in the film projecting device configuration, with a positive film original holder negative film original holder can be unified into one type of film holding member, at the time of negative film original projection 2
Frame projection can be performed.

[0010]

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
It will be described based on. Note that 1 to 4, 7, and 10 are the same as in FIG. 8 described above, and NF and 16 are the same as in FIGS. In FIG. 1, the film holding member 2
Numeral 0 denotes an upper holding plate 21 and a lower holding plate 22 as a negative film original holding portion, and each hinge portion 21a, 22
In FIG. 3A, the negative film original is rotatably mounted by a hinge shaft 23, and the lower holding plate 22 on the side of the negative film original holding portion has a longitudinal direction of the negative film original when the negative film original is mounted.
Longitudinal positioning orthogonal to the longitudinal direction that regulates one end of the
In order to regulate the rib 22c and the widthwise short direction thereof
Plural short direction positioning opposing parallel to the longitudinal direction of the
The lower holding plate 22 is connected to a negative film original holding section and has a plurality of positive film original setting sections 22d as a positive film original holding section.
The positive film original set portion 22d is provided with a pair of pressing springs 22e. Then, when projecting the negative film original, the longitudinal direction of the negative film original NF is abutted against the longitudinal direction positioning rib 22c, and the short direction is positioned by the short direction positioning rib 22b. When projecting the positive film original, the positive film original 16 is inserted into the positive film original setting section 22d.
Is set, and is pressed and fixed by a pair of pressing springs 22e.

Further, as shown in FIG.
The lower holding plate 22 has through holes 21 on one side edge thereof.
f and 22f are coaxially provided at the corresponding positions of each frame of the negative film. As shown in FIG. 2, in a state where the film holding member 20 is set at the position where the negative film original is projected on the film projecting device 10, the light emitting sensor is provided in the film projecting device 10 at a position above the through hole 21f of the upper holding plate 21. Numerals 24 are provided with light receiving sensors 25 at positions below the through holes 22f of the lower holding plate 22, respectively. Therefore, in the negative film projection state, the light emission sensor 24
The light emitted from the negative film original NF passes through the through holes 21f and 22f and enters the light receiving sensor 25.
Can be identified. Further, in the positive film projection state, the through hole 21 shown in FIG.
Since there is no f and 22f, the light emitted from the light emitting sensor 24 is blocked by the lower holding plate 22, so that the light cannot reach the light receiving sensor 25, and it can be recognized that the positive film original 16 has been set.

FIGS. 3 to 6 show a second embodiment of the present invention. 3 and 4 show a state in which no film original is set, FIG. 5 shows a state in which a negative film original is set, and FIG. 6 shows a state in which a positive film original is set. Does not show the upper holding plate for easy understanding. 3 and 4, the film holding member 30 includes an upper holding plate 31 and a lower holding plate 32, and is rotatably attached to hinge portions 31a and 32a by hinge shafts 33, respectively. In addition, a negative film original NF is attached to the lower holding plate 32.
The longitudinal end of a negative film original for
A longitudinal positioning rib 32c orthogonal to the longitudinal direction and
Flat in the longitudinal direction to regulate the short direction, which is the width direction of the
A plurality of pairs of short-side positioning ribs 32b facing each other
But further wherein the plurality of recesses 32d for <br/> set of positive film original 16 to the position between the lateral direction positioning rib 32b
Each is arranged. The recess 32d is provided with a through hole 32f at a position corresponding to each frame of the negative film original outside the area of the negative film original.
d is the lateral position adjacent to each other across the longitudinal direction
From the center of one rib of the determining rib 32b to the other in the short direction
Negative film original 2 up to the center of the rib 32b
A projection window 32g of the size of a frame is formed. As shown in FIG. 4, the upper holding plate 31 is also provided with a through hole 31f coaxially with the through hole 32f of the lower holding plate 32. Other configurations are the same as those of the first embodiment.

First, when a negative film original NF is used for the film holding member 30, as shown in FIG. 5, the negative film original NF abuts its longitudinal direction against the longitudinal positioning rib 32 c and faces in the short direction. The respective positioning is performed by the short-side positioning ribs 32b, which are sandwiched and held between the upper holding plate 21 and the lower holding plate 32. In this set state, the through hole 32f is maintained in a penetrated state,
In the same manner as in the first embodiment, it is possible to identify that the negative film NF is set by the light emission sensor or the like. Also, Neguff
At the time of ILM projection, if necessary, through the projection window 32g
One or two frames can be projected simultaneously. Next, when the positive film original 16 is used as a film holding member, the positive film original 16 is dropped into the positive film original setting recess 32d of the lower holding plate 32 as shown in FIG.
The upper holding plate 31 holds the upper holding plate 31 from above. At the time of setting the positive film original, the through-hole 32f is shielded by the mount 16a of the positive film original 16, so that it is possible to recognize that the positive film original 16 has been set as in the first embodiment.

FIG. 7 shows another embodiment of the means for detecting the discrimination between a negative film original and a positive film original in the film holding member in the film projection apparatus of the present invention. This embodiment is supported by a film projector main body (not shown) as a film original identification detecting means on the apparatus main body side in the case where the upper and lower holding plates do not have through holes for film original detection as in the above-described embodiments. And a roller holder 45 which is slidably engaged with the film projection apparatus main body at the lower portion of the detection sensor 46 in the directions indicated by arrows a and b, and a bearing 45a of the roller holder 45. And a detection roller 44 rotatably supporting a shaft 44a. In addition, 40 is a film holding member, 42 is a lower holding plate,
42a is a short direction positioning rib, and 43 is a hinge shaft between the upper support plate and the lower support plate 42 (not shown). Other configurations are the same as those of the first embodiment. In the present embodiment having the above configuration, in the negative film original NF setting state, the detection roller 44 and the roller holder 45 are in a solid line state in the drawing.
The tip end portion 45b of the roller holder 45 does not shield the detection sensor 46, so that it is possible to detect that the negative film is set. When the positive film original 16 is set, the detection roller 44 is lifted by the positive film original 16 in the direction b in the figure, and the detection roller 44 and the roller holder 45 are in the state indicated by the two-dot chain line in the figure. Therefore, the tip end portion 45b of the roller holder 45 puts the detection sensor 46 in the shielded state, so that it is possible to detect that the positive film is set.

[0015]

According to the present invention, Negafu as described above
While holding the film original, lay it flat in the longitudinal direction of the film.
Position that regulates the longitudinal direction of the negative film original
A plurality of regulating portions are provided on the holding plate at predetermined intervals, and
Position and hold the original
Positive film original set at a position between the position regulating parts of the plate
And set the positive film original in the set section.
Holding position, and one of the adjacent position regulating portions
Negative film from the center of the other to the center of the other position regulating part
By providing a projection window for the area of two originals,
It is possible to reduce the length of the lum holding member and make it compact.
When projecting a negative film original.
Shadows are possible .

[Brief description of the drawings]

FIG. 1 is a plan view of a film holding member in a film projector according to a first embodiment of the present invention.

FIG. 2 is a projection view of a negative film of the film holding member.

FIG. 3 is a plan view of a film holding member according to a second embodiment of the present invention.

FIG. 4 is a sectional view of the same.

FIG. 5 is a view showing a state where a negative film original is set.

FIG. 6 is a view showing a state where a positive film original is set.

FIG. 7 is a sectional view of a main part of another embodiment of the film projection apparatus of the present invention.

FIG. 8 is a configuration diagram of a conventional film projector.

FIG. 9 is a perspective view when a film holding member is mounted on the film projection device.

FIG. 10 is a plan view of a conventional negative film holding member.

FIG. 11 is a sectional view thereof.

FIG. 12 is a plan view of a conventional positive film holding member.

[Explanation of symbols]

NF ・ ・ Negative film manuscript, PF ・ Positive film, 1
0..film projector, 16..positive film original,
20, 30, 40 · · · film holding member, 21, 31,
41 upper holding plate, 22, 32, 42 lower holding plate, 2
1a, 22a, 31a, 32a hinge part, 22b,
32b, 42b ··· negative film short direction positioning rib, 22c, 32c · · negative film longitudinal direction positioning rib, 22d, 32d · · positive film original set recess, 21f, 22f, 31f, 32f · · · through hole, 2
································································································· 33
5. Light receiving sensor.

Claims (1)

(57) [Claims] 1. A negative film original or a positive film original
With the manuscript held on the holding plate,
The film holding member to be set
While holding the original, position it parallel to the film's longitudinal direction.
Position regulating section that regulates the longitudinal direction of the negative film original
Are provided on the holding plate at predetermined intervals, and a negative film
The document is held in a position-restricted state, and in front of the holding plate.
Position the positive film original set in the position between the position
To set and hold the positive film original in the set section
And the center of one of the adjacent position regulating parts.
Negative film original 2 from to the center of the other position control section
A film characterized by having a projection window in the range of frames
Holding member.