JPH0235435A - Rotary camera for photographing using microfilm - Google Patents

Abstract

PURPOSE:To use space effectively and to secure a sufficiently long optical path by leading the image of an original on a rotating drum to a camera unit via a first mirror in the upper rear corner of a case and a second mirror in the bottom of the case. CONSTITUTION:The rotating drum 18 to carry the original with the original stuck on a rotating drum body by means of negative pressure is arranged sideways in the vicinity of the front plate 10a of the case 10 whose shape is almost a rectangular parallelopiped. A camera unit 24, constituted of lens 92, film 73, etc., is arranged at the rear of the top plate 10b of the case 10. The image of the original placed diagonally to the upper rear of the rotating drum 18 is led to the camera unit 24 via the first mirror 96 in the vicinity of the upper rear corner of the case and the second mirror 98 in the vicinity of the case bottom which is just beneath the camera unit 24, thereby photographing. Thus, a longer optical path is secured by effectively using the space of the long narrow case, and the device is miniaturized.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a microfilm photographing method in which an original conveyed at a constant speed is photographed on a microfilm that is conveyed at a constant speed reduction ratio with respect to the original. This is related to rotary cameras.

(Technical Background of the Invention) This type of conventional rotary camera is configured to convey a document by sandwiching it between a large number of roller groups or belt groups. However, this conventional type has the problem that when the original is inserted between the rollers or the belt, the original does not enter smoothly, resulting in a paper jam (jam), and the original is easily damaged or bent. This problem is particularly likely to occur when the document to be input is thin or small in size.

Also, the rollers and belts will wear out after long-term use, but
As this wear progresses, slippage may occur during document feeding, and the conveying speed may become unstable. In such a case, there is a problem that the document feed speed and the film feed speed are out of synchronization, and the quality of the film finish deteriorates.

Further, in the conventional apparatus, the roller group and the belt group are arranged in a complicated manner, and in order to guide the image to the film while avoiding interference with these, the setting of the optical path tends to be complicated. For this reason, there was a problem in that it was difficult to ensure a long optical path length, and the device was likely to be large-sized.

(Object of the Invention) The present invention has been made in view of the above circumstances, and is intended to prevent problems such as jamming, damage, and bending of originals.
The conveyance speed will not become unstable even after long-term use (the finishing quality of the film can be improved,
Another object of the present invention is to provide a rotary camera for microfilm photography, which makes it possible to downsize the device while ensuring a long optical path by effectively utilizing the space inside the case of the device.

(Structure of the Invention) According to the present invention, in an apparatus for projecting an original image conveyed at a constant speed onto a microfilm that moves at a constant speed reduction ratio, the present invention includes a substantially rectangular parallelepiped case;
A rotating drum is placed horizontally close to the front plate of the case, and conveys the original in close contact with the surface of the rotary cylinder by suction and negative pressure, and a camera unit is placed on the back side of the top plate of the case. , an optical system disposed below the camera unit and on the back side of the rotating drum, and the optical system captures the image of the document located diagonally above and on the back side of the rotating drum near the dirt corner in the case. This is achieved by a rotary camera for photographing microfilm, which is characterized in that the information is guided to the camera unit through a first mirror disposed at the bottom of the case vertically below the camera unit and a second mirror disposed near the bottom of the case vertically below the camera unit.

(Example) Fig. 1 is a side sectional view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the line II-II showing the structure near the rotating drum, and Fig. 3 is a sectional view taken along the line II-II.
The figure is an exploded perspective view of the rotating drum, FIG. 4 is an external view of the entire apparatus, and FIG. 5 is a front view showing the arrangement of the rotating drum and the like.

In Figure 4.5, numeral 10 is a case, and this case 10
is placed on desk 12. The inside of this case 10 is partitioned into three rooms by a pair of left and right vertical walls 14 and 16.

A rotating drum 18 is disposed horizontally between the compatible walls 14 and 16, close to the front plate 10a of the case 10. Further, a suction fan 20 is housed on the left side of the left side vertical wall 14, and a blower fan 22 is housed on the right side of the right side vertical wall 16. A camera unit 24 is located on the back side of the upper plate 10b of the case 10.
is installed. In FIG. 4, reference numeral 26 denotes an original input table, and 28 denotes an output table, which are attached to the front plate 10a of the case 10. In other words, the document insertion port and ejection port are
Both are located at the front of the case 10. 30 is an operation panel.

The rotating drum 18 is constructed as shown in FIG. 2.3.

That is, there is a cylindrical metal cylinder 32 in which many small holes (approximately 2 to 7 mm in diameter) are formed at appropriate intervals, and a plurality of chambers are formed inside the cylinder 32. and a partition assembly 34 for partitioning. A porous filter (for example, product name Vilene HP-21) is provided on the outer surface of the cylindrical body 32.
It is desirable to attach a thin air permeable member 32a such as cloth, paper, or non-woven fabric. The partition assembly 34 includes a small-diameter cylinder 36 with one end closed, five partition plates 38a to 38e extending radially along the longitudinal direction of this 36, and partition plates 38a to 38e.
Two partition plates 40.4 fixed to the end faces in the axial direction of 8e
2. As a result, the assembly 34 includes each partition plate 38.
a-e.

40.4 rooms A and B open in the radial direction sandwiched by 42
, C, and D are defined. Note that a part of the partition plate 40 on the closed end side of the small diameter cylinder 36 is cut out in a fan shape, and this cutout part faces the room B that serves as the suction section. A large number of small holes 44 (FIG. 2) are opened in the small diameter cylinder 36 of this assembly 34 toward the chamber that becomes the peeling section.

This assembly 34 is inserted into the cylindrical body 32 and fixed to the case 10 side. The closed end side of the small diameter cylinder 36 is pivotally supported by an end plate 46 fixed to the cylinder body 32, and the outer peripheral surface of the other end of the assembly 34, that is, the open end of the small diameter cylinder 36 is connected to the end fixed to the cylinder body 32. It is pivotally supported by a plate 48. The open end of the small-diameter cylinder 36 protrudes through the end plate 48 and is fixed to the right vertical wall 16 of the case 10. Further, the end plate 46 is pivotally supported by the left vertical wall 14. That is, a bearing cap 50 is fixed to the end plate 46, the closed end of the small diameter cylinder 36 is pivotally supported by this cap 5°, and this cap 50 is further pivotally supported by the vertical wall 14. As a result, the assembly 34 is fixed and the cylinder 32
is rotatable in a coaxial position with this assembly 34. Note that the outer edges of each of the partition plates 38c to 38e, 40.42 of the assembly 34 are close to the inner surface of the metal cylinder 32, and the gap therebetween is sufficiently small to prevent air leakage.

The end plates 46, 48 are screwed to the metal cylinder 32.

Further, the assembly 34 is fixed so that the chamber B serving as the suction section is located at the upper left when viewed from the side as shown in FIG.

The suction fan 20 is connected to the rotating drum 18 with the standing wall 14 in between.
The end plate 46 and the standing wall 14
Air from room B is sucked through windows 46a and 14a provided in the room. Note that the space between the end plate 46 and the standing wall 14 is sealed with a seal cylinder 52 fixed to the standing wall 14 side. Here, the inner surface of the seal cylinder 52 faces the outer periphery of the end of the cylinder body 32, and the space between the two is airtightly sealed by appropriate means. For example, labyrinth seals, lip seals, etc. are used. Therefore, the pressure in the room B becomes negative, and the outside air flows into the room B through the small hole in the cylinder 32 and the air permeable thin member 32a.

The outlet of the blower fan 22 is connected to the open end of the small diameter cylinder 36 by a duct 54 . The air discharged by the blower fan 22 is guided to the small diameter tube 36 of the assembly 34, and further supplied to the room through the small hole 44. Therefore, the air in this room passes through the small holes in the cylinder 32 and the air permeable thin member 32a and is discharged to the outside.

When the operation switch is pressed on the operation panel 30, the cylinder 32 is rotated counterclockwise in FIG. 1 at a constant speed by the electric motor 56. That is, the pulley 64.6 of the motor 56
A flat belt 68 is wound around the boom part (see FIG. 2) integrally formed with the end plate 48 of the rotary drum 18 and the rotary drum 18, and the cylindrical body 32 is rotated by the belt 68. Note 7
0 is a feed roller, 72 is a contact roller that rolls into contact with this, and the feed roller 70 is driven by a belt by a pulley 62. The original inserted from the insertion table 26 is sandwiched between these rollers 70 and 72 and then transferred to the rotating drum 1.
Guided above 8.

Since the chamber B of the rotary drum 18 is suctioned by negative pressure, the document is attracted to the surface of the cylinder 32 by the negative pressure. Therefore, the original is attracted to the cylindrical body 32 and conveyed. When this document portion reaches the chamber, air is flowing out from the surface of the cylindrical body 32, so that the document is peeled off from the rotating drum 18 and discharged onto the discharge table 28 by the outflowing air. Here, air is also sent from a paper ejection fan 74 to the outer periphery near the room toward the ejection table 28 to promote ejection of the original. Note that this paper discharge fan 74 takes in air from around the second mirror 98, which will be described later, so that dust can be prevented from adhering to the second mirror 98. When the original is carried above the cylinder 32 in this way, the original sensor 76 (FIG. 1) detects this original and starts the camera unit 24 to take a picture. As this sensor 76, for example, a reflective optical sensor can be used.

The camera unit 24 includes a supply reel 78 for supplying the film 77, a take-up reel 80, a guide roller 82, 84 located between both reels 78, 80, and a photographing roller 86.
and has. A large diameter pulley 8 is coaxially attached to the photographing roller 86.
7, and both can be connected and connected using a manual clutch. This large diameter pulley 87 is driven by a small pulley 61 coaxially with the pulley 60 via a reduction pulley 88. Here, the pulley 60 and the small pulley 61 can be connected and connected by an electromagnetic clutch. As a result, when this electromagnetic clutch is connected, the large diameter pulley of the reduction boob IJ88 is driven by the small pulley 61 of the pulley 60 by the belt.
Further, the small diameter pulley of the deceleration pulley 88 drives the photographing roller 86 via the belt. Here, the reduction pulley 88 and the large diameter pulley 87 are provided on the case 10 side, and the photographing roller 86 coaxial with the large diameter pulley 87 is provided on the camera unit 24 side. The camera unit 24 is removable,
When this camera unit 24 is mounted in the position shown in FIGS. 1.4.5, the photographing roller 86 and the large diameter roller 87 are located coaxially, and are connected by a manual clutch. Then, due to the on/off of the electromagnetic clutch on the pulley 6o, the film 7
The running and stopping of 7 is controlled. Note that the running speed of the film 77 sent by the photographing roller 86 is determined according to the reduction ratio of the manipulated image, and for example, when reducing the image to 1/24, the running speed of the film 77 is set to 1/24 of the running speed of the outer peripheral surface of the rotating drum 18. Set.

↑ An electromagnetic shutter 9o and a photographic lens 92 are arranged below the crystal roller 86.

In the present invention, the optical system is arranged using a wide vertical space formed below the camera unit 24 on the back side of the rotating drum 18.

Reference numeral 94 denotes a light source, which irradiates the vicinity of the outer periphery of the chamber B where the document is sucked and fixed to the cylinder body 32. A horizontally long first mirror 96 is arranged at the upper back corner of the case 10, and a second mirror 98 is arranged vertically below the lens 92 of the camera unit 24 and near the bottom of the case 10. ing. The image of the original illuminated by the light source 94 is reflected by a first mirror 96 located diagonally above the cylinder 32 and a second mirror 98 located at the bottom of the case 10 and guided to the lens 92. Here, from the second mirror 98 to the lens 92
The optical axis leading to is almost vertical, and the space inside the case 10 is utilized to the maximum to increase the optical path length. Note 10
0 is a slit located between the second mirror 98 and the lens 92.

Next, the operation of this embodiment will be explained. When the power is turned on using the operation panel 30, each fan 20, 22, and 74 starts operating. As a result, the pressure in the chamber B of the rotating drum 18 becomes negative, and air is sucked into the chamber B through the cylindrical body 32 and the thin member 32a on its surface, while the pressure in the chamber becomes positive. Within this room, the thin member 32a
Air is expelled from the surface. When the photographing switch is pressed on the operation panel 30, the motor 56 is activated and the drum 18 is rotated. When the original is inserted from the insertion table 26, the rollers 70 and 72
At this time, the leading and trailing ends of the original are detected by a sensor 76, and the electromagnetic clutch is connected/disconnected to start and stop feeding of the film 77. Further, the shutter 90 is opened only for the time when the document enters the image reading position. As a result, the image of the original is incident on the film 77.

The mutual operational relationship among the sensor 76, film 77, and shutter 90 at this time is that when the sensor 76 detects the beginning of the document, the electromagnetic clutch is connected and the film 77 starts moving.
After the film 77 starts moving, the shack 90 is opened with a slight delay. Also sensor 7
6 detects the end of the document, the shutter 90 is closed,
After this, the film 77 is stopped.

When the document comes within the range of room B, it is attracted to the surface of the drum 18, travels together with the cylinder 32, and is photographed.

Since there is no inflow or outflow of air in the room C, the document is not sucked into the cylindrical body 32 within this room C. Therefore, the suction force of the document to the cylinder 32 disappears, and the document becomes a buffer section that prepares for the document to be peeled off next time. When the document reaches the room, air is flowing out from the drum surface, so the document is peeled off from the drum surface, and with the addition of air discharged from the fan 74, the document is smoothly sent to the discharge table 28 by the air flow.

(Effects of the Invention) As described above, in the present invention, the document is conveyed by suctioning the document onto the surface of the cylindrical body using the negative air pressure of the suction section. It is delivered smoothly by being in close contact with the Therefore, the document is less likely to be jammed, damaged, or bent, and even thin or small documents can be transported smoothly.

Furthermore, since the document is conveyed in close contact with the cylinder, the conveyance speed is always stable, and the finished quality of the film can be improved.

In addition, the rotating drum is placed on the front side of the case, and the camera unit is placed on the back side of the top surface of the case. Since the image is guided to the camera unit via the second mirror near the bottom of the rotary drum, a sufficiently long optical path length can be ensured by making the most effective use of the vertical space behind the rotating drum. This makes it possible to downsize the device.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II--II showing the structure near the rotating drum, and FIG.
The figure is an exploded perspective view of the rotating drum, FIG. 4 is an external view of the entire apparatus, and FIG. 5 is a front view showing the arrangement of the rotating drum and the like. DESCRIPTION OF SYMBOLS 10... Case, 10a... Front plate, 10b... Upper plate, 18... Rotating drum, 24... Camera unit, 32... Cylindrical body, B... Room as suction part , Patent applicant Fuji Photo Film Co., Ltd. Representative Patent attorney Yama 1) Wen Ri

Claims (1)

[Claims] (1) In a device that captures an image of a document transported at a constant speed onto a microfilm that moves at a constant speed reduction ratio, the camera is equipped with an approximately rectangular parallelepiped case and a transversely placed close to the front plate inside the case. A rotating drum that conveys documents in close contact with the surface of a rotating cylinder using negative suction pressure, a camera unit located at the back of the top plate of the case, and a camera unit located below this camera unit and at the back of the rotating drum. The optical system is configured to transmit an image of a document located diagonally above the rotating drum to a first mirror disposed near an upper back corner of the case, and to a camera unit vertically below the camera unit. A rotary camera for microfilm photography, characterized in that the camera is guided to a camera unit via a second mirror disposed near the bottom of the case.