JPS62208033A - Film projecting device - Google Patents

Abstract

PURPOSE:To facilitate attaching and detaching operation by forming a projection lens assembly as a unit body which is freely positioned and attachable and detachable through engaging members provided at specific positions of a main device body facing a film holding assembly relatively on a projection lens assembly side and a main device body side. CONSTITUTION:A fiche film carrier 5B is mounted as the film holding assembly. The lens changeover lever 94 of a projection lens unit body 6B which is mounted is rotated clockwise or counterclockwise to rotate a lens barrel support body 98 supported 97 pivotally on the reverse surface side of an upper substrate 93, so that the 1st or 2nd lens barrel 91 or 92 is switched and positioned at the optical axis position of an optical projection system. Consequently, a single lens falling type or lens turret type is usable in proper combination even as to a projection lens assembly corresponding to the replacement use of the roll film carrier as the film holding assembly or the main device body of the fiche film carrier 5B.

Description

Detailed Description of the Invention A1 Object of the Invention [Field of Industrial Application] The present invention relates to a film projection device, more specifically, a film projection device, which holds a film, positions a required film frame image in an illumination section, and a removable film retention assembly;
A projection lens including a projection lens/focus adjustment mechanism, which is disposed opposite to the film holding assembly with a common projection optical axis, and forms and projects a frame image positioned on the illumination section by the film holding assembly onto a projection target member. The present invention relates to a film projection device having an assembly.

[Conventional technology]

A typical example of the above-mentioned film projection device is a microfilm reader or a microfilm reader. A microfilm reader printer will be explained below as an example.

FIG. 6 shows a very schematic configuration of an example of a microfilm reader printer. Reference numeral 1 denotes an exterior casing of the main body of the apparatus (printer main body), a copying mechanism is built in approximately the lower half of the exterior casing, the half on the road serves as a dark box, and there is a space between the lower half and the upper half. When viewed from the front side of the exterior casing, the space 2 is largely retracted into the interior of the casing to form a deep space 2, and this space is used as a mounting area for a film holding assembly 5 and a projection lens assembly 6. The film holding assembly 5 and the projection lens assembly 6 are disposed opposite to each other on the upper surface side of the floor plate 3 and the lower surface side of the ceiling plate 4 in the assembly installation space 2, respectively, with a common projection optical axis. 7 is a film illumination section consisting of an illumination lamp 7a, a condensing lens 7b, etc., and both assemblies 5 are placed on the opposite side of the projection lens assembly 6 with the film holding assembly 5 inside.
・It is arranged upward so that the projection optical axis is common to that of 6. F indicates a portion of the microfilm held by the film holding assembly 5.

It is held by the film holding assembly 5, and the illumination part 7
The desired film frame image Fa retrieved at the position is illuminated by the illumination unit 7, and the transmitted light of the film frame image of the illumination light enters the projection lens assembly 6, and the fixed first mirror 8 on the dark box side → solid line An enlarged projected image is formed on the back surface of the screen 11 provided on the front side of the dark box via the path from the movable second mirror 9 in the fallen posture shown to the fixed third mirror lO, and the image, that is, the above-mentioned required image is formed. An enlarged projected image of the film frame image Fa is viewed and read from the outside of the screen 11.

If the user wishes to obtain an enlarged copy of the frame image Fa, the user presses a copy button (not shown).

Then, the movable second mirror 9 springs up as shown by the two-dot chain line and is held in that position, and the scanning mirror box 12
is once moved upward (forward movement a) from the standby position shown by the solid line to the position shown by the two-dot chain line.The drive system, movement guide member, etc. of the scanning mirror box are omitted from the figure.

Further, a photosensitive drum 14 of a copying mechanism built in the lower half of the outer casing of the apparatus is rotated at a predetermined circumferential speed in the direction of the arrow. The scanning mirror box 12, which has been moved upward to the position shown by the two-dot chain line, is moved quickly back toward the initial standby position in synchronization with the rotation of the photosensitive drum 14. As a result, an enlarged image of the required film frame image Fa located in the illumination section 7 is transmitted from the projection lens assembly 6 to the fixed first mirror 8 to the first mirror 12a of the scanning mirror box 12 to the second mirror 1.
2b→Slit exposure is performed on the surface of the rotating photosensitive drum 14 by the slit 13 optical system. Then, an enlarged toner image corresponding to the slit exposure image, that is, the film frame image Fa, is formed on the circumferential surface of the photosensitive drum by an image forming device (not shown) disposed around the drum, and the toner image is The sheets are sequentially transferred onto the copy paper P side fed from the paper unit 16 to the transfer unit 15 of the rotary photosensitive drum 14, and the copy paper passes through the fixing device 17 and is delivered to the paper output tray as an enlarged copy of the required film frame image Fa. 18.

16a is a copy paper cassette loaded with copy materials;
It can be freely taken in and out of the paper feed section 16 as shown by the arrow.

16b is a paper feed roller, 16c is a deflection guide for the fed copy material, and 16d is a conveyance path for the copy material.

The film holding assembly 5 is of two types: a so-called roll film carrier for handling roll films, and a so-called fish film carrier for handling fish films (including strip films).

The roll film carrier includes a film winding/rewinding reel, its rotation drive mechanism, a fixed/movable film platen mechanism, a film frame mark retrieval mechanism, and the like.

The fish film carrier includes a fixed/movable film platen mechanism, an X/Y moving mechanism for the platen mechanism, an index plate setting section, and the like.

There are two types of projection lens assembly 6: a so-called single lens drop-in type and a so-called lens turret type.

The single-lens drop-in type is a lens mirror that easily holds the lens barrel of the selected magnification among several projection lens barrels with different enlargement projection magnifications in a drop-in type that can be inserted and removed freely. It includes a body holding member and a focus adjustment mechanism that changes the holding position of the holding lens barrel for focusing.

The lens turret type is equipped with two or more lens barrels each having different enlargement magnification on a common support, and each of the lens barrels is equipped with a focus adjustment mechanism,
This structure is such that a lens barrel having a desired enlargement projection magnification is selectively positioned at the optical axis position of the projection optical system by rotating or moving the support body.

Generally, the single lens drop-in type is suitable as the projection lens assembly 6 when the film holding assembly 5 is a roll film carrier, and the lens turret type is suitable as the projection lens assembly 6 when the film holding assembly 5 is a fish film carrier. Incidentally, film projection is also possible in the case of the reverse combination to the above.

[Problem that the invention seeks to solve]

By the way, in conventional microfilm readers, reader printers, etc., the film holding assembly 5 is designed to accommodate both roll film and fish film (or stop film). Depending on the above configuration, a roll film carrier or a fish film carrier can be used by being detachably attached to the main body of a device such as a league or reader printer.

(1) However, regarding the projection lens assembly 6, either a single lens drop-in type or a lens turret type assembly specified by the manufacturer is fixed to the main body of the device, and therefore the above-mentioned In response to the interchangeable use of a roll film carrier or fish carrier as the film holding assembly 5, the projection lens assembly 6 is replaced with a single lens drop-in type or a lens turret type that is suitable for the exchange carrier. I couldn't do that.

(2) Also, as mentioned above, a fixed single lens drop-in type or lens turret type projection lens assembly 6 is installed on the main body side of the apparatus and is located protrudingly opposite to the film holding assembly 5. Because of this, it becomes an obstacle when attaching and detaching the roll film carrier or fish carrier as the film holding assembly 5, and therefore, it is necessary to devise a method and structure for attaching and detaching the carrier so as not to interfere with it. The attachment/detachment operation procedure and structure are complicated. In particular, in the case of a roll film carrier, the film platen mechanism, film frame mark search mechanism, etc. located in the film illumination section 7 are located inside, and on both sides there are relatively large film winding/rewinding reels and their rotation drive parts. Therefore, it requires some ingenuity to attach and detach it from the main body of the apparatus while avoiding interference with the projection lens assembly 6, and in many cases, a large rotation operation is required around the film platen mechanism in the center. In some cases, attachment/detachment requires more complicated procedures, or in some cases, parts of the components must be disassembled before attachment/detachment is performed.

The present invention aims to solve the above problems (1) and (2).

1. Structure of the Invention [Means for Solving Problems] The present invention provides a projection lens assembly such as a single lens drop-in type or a lens turret type in a film projection apparatus such as a microfilm reader or a microfilm reader printer as described above. The film projection device is characterized in that it is a unit body that can be freely positioned and detached from the projection lens assembly side and the device main body side at a predetermined position of the device main body facing the film holding assembly. This is the summary.

[For production]

That is, in the present invention, the projection lens assembly is made into a unitary body that can be attached to and detached from a predetermined position of the main body of the apparatus.
Corresponding to the use of a roll film carrier or fish film carrier as a film holding assembly to replace the main body of the device, the projection lens assembly may also be replaced with a single lens drop-in type or a lens turret suitable for the type of carrier used. The formulas can be exchanged and used in combination.

Furthermore, when attaching and detaching the film holding assembly to and from the apparatus main body, the projection lens assembly that is in the apparatus state, which becomes an interference obstacle, can be removed once, so the structure and operation for attaching and removing the film holding assembly to and from the apparatus body are extremely simple. It can be done.

〔Example〕

Figures 1 to 3 show a single-lens drop-in type projection lens assembly, which is a unit body 6 that can be detachably attached to a predetermined position in the main body of a device such as a microfilm reader or reader printer.
Fig. 1 is a longitudinal cross-sectional side view of the lens unit 6A installed in a predetermined position on the main body of the device, Fig. 2 is an exploded perspective view of the unit, and Fig. 3 is an example of the lens unit 6A configured as A. It is a figure showing a previous state or a removed state.

Reference numeral 20 denotes a lens unit attachment/detaching support that is firmly fixed with screws or the like at a predetermined lens unit mounting position on the apparatus main body side (in this example, a predetermined position on the lower surface of the ceiling plate 4 in the apparatus main body cavity 2) with its longitudinal direction in the front-rear direction. It is a rail plate. 21.2
1 is a screw hole, 22 and 22 are rail edges provided along the longitudinal length of the left and right sides of the plate, and 23 and 23 are angle cam-shaped click protrusions provided in the middle of each of the left and right rail edges 22 @ 22, When receiving a pressing force, it sinks downward against the elasticity of the connecting portions 23a, 23a. 24 is a notch recess formed in the center of the front edge of the plate, and 25 is a light transmitting window hole formed in the center of the plate surface.

Reference numeral 30 denotes the upper main frame of the lens unit 6A, and the lens unit 6A is attached to and removed from a predetermined position on the apparatus main body side by engaging this upper main frame with the rail plate 20 provided on the apparatus main body side. Reference numerals 31 and 31 indicate rail strips provided inwardly facing each other along the upper edge lengths of the left and right frame sides of the main frame, and 32 and 32 indicate rail strips 31 and 3 on the left and right sides of the main frame.
A notch recess is provided in the middle of 1, 33 is a rear wall plate provided facing downward on the rear side of the frame, and 34 (34) is provided outward on the lower edge of the left and right sides of the rear wall plate, respectively. Engagement claw protrusion 35 is a convex portion provided inward at the center of the front side of the frame;
36 (3+1) is an anti-slip protrusion formed on the surface of the lens unit gripping portion, with the outer surface portions on the front end side of the left and right sides of the frame serving as the lens unit gripping portions.

The left and right rail strips 3 of the upper main frame 30 on the lens unit 6A side are on the tip side of the rail plate 20 on the device main body side.
The rear ends of 1 and 31 are placed in corresponding positions, and the left and right rails 31 and 31 on the upper main frame 30 side are engaged with the left and right rails 1i22-22 on the rail plate 20 side, and the rail plate 20 is assembled.
Push in while sliding the upper main frame 30 against the
3, arrow C), while the slide is being pushed in, the back ends of the left and right rail strips 31-31 on the upper main frame 30 side are located in the middle of the left and right rail edges 22-22 on the rail plate 20 side, respectively. It hits the click protrusions 23, 23. When the upper main frame 30 is pushed further against the abutment resistance,
The click protrusions 23, 23 sink downward against the elasticity of the connecting portions 23a, 23a, allowing the upper main frame 30 to continue pushing. Then, when the protrusion 35 on the front side of the upper main frame 30 is engaged with the notch recess 24 on the leading edge side of the rail plate 20 and the upper main frame is pushed in sufficiently until it hits, the click protrusion 23 is placed in the upper main frame at the 23 position. Notch recess 33-33 existing in the middle of the rail strip 32-32 on the 30 side
is in the corresponding position, and the click protrusion 23φ23 moves upward and engages with the recessed portions 33. As a result, the upper main frame 30, that is, the lens unit 6A is positioned and supported at a predetermined position in the main body of the apparatus (as shown by the two-dot chain line in FIGS. 1 and 3).

To remove the lens unit 6A that is mounted and supported on the main body of the device, move the upper main frame 30 of the lens unit 6A in the direction opposite to the above-mentioned mounting direction (arrow d in FIG. Notch recesses 33, 33 and click protrusions 23, 23
By pulling against the engagement force of the click protrusion 23
・The lens 23 sinks downward and disengages from the notch recesses 33, 33. After that, the upper main frame 30 is smoothly pulled out from the rail plate 20, and the lens 22 h6A can be easily removed from the device main body side. It is removed (Figure 3).

In this embodiment, the rail play) 20 is used to smoothly insert and remove the upper main frame 30 from the rail play) 20.
The left and right rail edges 22-22 are tapered rail edges that are slightly tapered in front of each other. Corresponding to this, the upper main frame 3
The engagement rail strips 31 and 31 on the 0 side are also tapered rail strips that taper toward the front of each other.

40 is a lower main frame of the lens 22) 6A, 41 is a helicoidal female cylinder fitting hole provided in the lower main frame, 42 is a rear wall plate provided upward on the rear side of the frame, This back wall plate 4
The downward rear wall plate 33 of the upper main frame 30 is fitted into the inner side of the upper main frame 30, and when it is fully fitted, the engaging claw protrusion 3 on the upper main frame 30 side
4 (34) are fitted into and engaged with the engagement holes 43, 43 provided on the lower main frame 30 side, so that the upper and lower main frames 30, 40 are engaged and integrated.

Reference numeral 50 denotes a helicoid female cylinder support member, and a pair of L-shaped arms 52 are provided on the left and right sides of the horizontal axis 51 in the left-right direction. Each of the vertical arms 53, 53 of the left and right L-shaped arms is an arm plate having elasticity in the front-rear direction, and the tip of each horizontal arm 54, 54 is provided with bearing plates 55, 55 facing vertically. There is.

56-56 are bearing holes formed in those bearing plates.

Also, the portion of each horizontal arm 54 near the horizontal axis 51 is a bent portion 5.
7.57 to give the arm vertical elasticity. Further, the horizontal shaft portion 51a between the left and right L-shaped arms 52 has appropriate torsional elasticity.

The helicoidal female cylinder support member 50 includes the left and right ends 51b051b of the horizontal shaft 51 and the left and right L-shaped arms 52, 52.
The bearing having the shaft portion 51a between the two on the rear frame side of the lower main frame 40 is fitted into the grooves 44b (44b) and 44a and is supported, so that the lower main frame 40 and the upper main frame 30 are connected. When integrated as described above, the rear wall plate 33 on the upper main frame 30 side
A convex portion 37 provided on the lower edge of the bearing of the lower main frame 30 is positioned opposite to the groove 44a, thereby preventing the shaft 51 from swinging. The vertical arms 53, 53 of the left and right L-shaped arms 52, 52 elastically contact the inner surface of the rear wall plate 33 of the upper main frame 30, which is fitted inside the rear wall plate 42 of the lower main frame 40. come into contact with The helicoid female cylinder 60 is supported by bearings between the bearing plates 55φ55 of the horizontal arms 54 and 54 of the arm 52φ52, and is a shaft pin supported by the bearing plates 55 in the helicoid female cylinder fitting hole 41 of the lower main frame 40. 61 (81), front and rear guard walls 46a and 4 integral with the lower main frame 40
It is free to rotate and move within the range regulated by 6b.

70 is a helicoid male tube screwed into the helicoid female tube 60 from the upper end side, 71 is a freely rotatable protrusion provided on the outer periphery of the male tube, and 72 is a rotation range regulating stopper piece. When the helicoid male cylinder 70 rotates counterclockwise with respect to the female cylinder 60, the stopper piece 72 comes into contact with the first receiver on the lower main frame 40 side and is received by the portion 45a, and rotates clockwise. As it progresses, the first receiver comes into contact with and is received by the second receiver part 45b on the opposite side of the part 45a by approximately 1801'', and therefore, the helicoid male tube 70 comes into contact with the first and second receiver parts 45a.・
Helicoid female cylinder 60 within approximately 180' range between 45b
It can be rotated freely.

Single lens barrel 80 for the above helicoid male barrel 70
is set by dropping it from the upper end of the male cylinder.

The above members 30, 40, 50, 60, 70, and pot 80 constitute a single lens drop-in type projection lens unit body 6A that is detachable from the main body of the apparatus.

In the installed state, the lower surface of the lower end flange 62 of the helicoidal female cylinder 60 is placed on the upper surface of the upper platen glass 100 on the side of the roll film carrier 5A serving as a film holding assembly, as shown in the first figure.
51 a) Elasticity and axial pin 61 of helicoid female cylinder 60
Helicoid female tube 60 by swinging around (81)
Due to the floating of the lens, the lens is elastically maintained in a stable pressure contact state with a substantially constant pressing force, and as a result, the optical axis of the lens is automatically vertically aligned with respect to the film. 101
is a lower platen glass, and the film F is sandwiched between the upper and lower platen glasses. When the film is running, the lower platen glass 101 is lowered to release the film from being sandwiched.

The male helicoid barrel 70 with the single lens barrel 80 set therein is rotated to the left or right by an appropriate amount with respect to the female barrel 60, thereby removing the male barrel 70, that is, the single lens barrel 80.
moves up and down with respect to the female barrel 60 to change the position of the single lens barrel 80 relative to one surface of the film, thereby adjusting the focus.

FIG. 4 is a perspective view of an example of a lens turret type projection lens assembly that is a unit body 6B that is detachable from the apparatus main body.

The one in this example is a two-tube switching type having two lens barrels 91 and 92, first and second, which have mutually different enlargement projection magnifications.

Reference numeral 93 designates the upper substrate of the unit body 6B, and this substrate has a rail strip 31 that engages with the rail plate 20 on the device main body side, similar to the unit body 6A in the examples of FIGS. 1 to 3.
・31, notched recesses 32, 32, and a convex portion 35 are provided, so that the unit body 6B can be easily positioned and removed from a predetermined position of the device body in the same way as the unit body 6A. .

FIG. 5 is a diagram showing a state in which the lens unit body 6B is attached to the main body of the apparatus. A fish film carrier 5B is installed as a film holding assembly.

A lens barrel support that is rotatably pivoted on the lower surface side of the upper substrate 93 by rotating the lens switching lever 94 (FIG. 4) of the attached projection lens unit body 6B to the left or right. The body 98 rotates and the first lens barrel 9
The first or second lens barrel 92 is selectively located at the optical axis position of the projection optical system. Focus adjustment is performed using the adjustment ring 9 of the W adjustment mechanism provided on each of the first and second lens barrels 91-92.
This is done by rotating 5.96.

Thus, a roll film carrier 5A or a fish film carrier 5B as a film holding assembly.
Corresponding to the replacement of the main body of the apparatus, the projection lens assembly 6A or the lens turret type 6B can be appropriately replaced and used in combination.

Furthermore, when attaching and detaching the film holding assemblies 5A and 5B to and from the apparatus main body, the attached projection lens assembly 6A or 6B, which becomes an interference obstacle, can be removed once. The structure and operation can be made extremely simple. Furthermore, it is also possible to attach and detach various open circuit units for use.

C1. Effects of the Invention As described above, the present invention satisfies the intended purpose and is suitable as an effective improvement for this type of film projection apparatus.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a longitudinal cross-sectional side view of an example of a unitized single-lens drop-in projection lens assembly when it is attached to the main body of the apparatus, and FIG.
The figure is an exploded perspective view, Figure 3 is a diagram of the state before installation or after removal, Figure 4 is a perspective view of an example of a lens turret type projection lens assembly that has been made into a unit, and Figure 5 is a perspective view of the lens turret type projection lens assembly as a unit. FIG. 6 is a schematic configuration diagram of an example of a microfilm reader printer. 5A is a roll micro film carrier as a film holding assembly, 5B is a fish film carrier, 6A is a single lens drop-in unit as a projection lens assembly, and 6B is a lens turret unit. Figure 3 Figure 5 Figure 6

Claims (2)

[Claims] (1) A film holding assembly that holds the film and positions the required film frame images in the illumination section, is detachable from the main body of the apparatus, and is arranged opposite to the film holding assembly with a common projection optical axis. , in a film projection apparatus having a projection lens assembly including a projection lens and a focus adjustment mechanism, which forms and projects a film frame image positioned in an illumination unit onto a projection target member by a film holding assembly, the projection lens assembly is connected to a film holding assembly; A unit body that can be positioned, attached and removed at a predetermined position on the apparatus main body facing the projection lens assembly side and the apparatus main body side through an engagement member provided relatively to the apparatus main body side,
A film projection device characterized by: (2) The film projection device is a microfilm reader or a microfilm reader printer, the film holding assembly is a roll film carrier or a fish film carrier, and the projection lens assembly is a single lens drop-in type or a lens turret type. The film projection device according to scope 1.