JP2511294B2 - Rotary camera for micro film photography - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to microfilm photographing in which a document conveyed at a constant speed is photographed on a microfilm sent at a constant reduction ratio with respect to the document. Rotary camera.

(Technical Background of the Invention) A conventional rotary camera of this type is configured so that a document is sandwiched between a large number of roller groups and a belt group and conveyed. However, this conventional device has a problem that when the document enters between the rollers or the belt, the document does not smoothly enter, causing a paper jam (jam), and easily causing the document to be damaged or bent. In particular, when the thickness of the document to be input is small, the size is small, or static electricity is generated, such a problem is likely to occur.

Further, the rollers and belts are worn due to long-term use, but if this wear progresses, slippage may occur during document feeding, and the conveyance 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 with each other, and the film finish quality is deteriorated.

(Object of the Invention) The present invention has been made in view of such circumstances,
Problems such as document jams, breakage, and bending are unlikely to occur, the transport speed does not become unstable even for long-term use, and the finish quality of the film can be improved, making the document stable. An object of the present invention is to provide a rotary camera for photographing a microfilm that can be transported.

(Structure of the Invention) According to the present invention, an object of the present invention is to photograph a document image conveyed at a constant speed on a microfilm moving at a constant speed reduction ratio with the original image, in which a cylinder having a large number of small holes is formed. Body, a suction section for sucking outside air from the surface of the cylinder to the inside and adhering the original to the surface of the cylinder in a predetermined range including at least the reading range of the cylinder, and a downstream side of the suction section in the rotation direction of the cylinder. Located on the side where the air is ejected from the surface of the cylinder to separate the original from the surface of the cylinder, and air is sent from the vicinity of the separation to the original discharge tray to guide the original separated at the separation to the original outlet. And a rotary fan for photographing a microfilm, which is provided with a paper fan.

(Embodiment) 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 around the rotating drum, and FIG. 3 is an exploded perspective view of the rotating drum. Figure 4 is an external view of the entire device,
FIG. 5 is a front view showing the arrangement of the rotating drum and the like.

In FIGS. 4 and 5, reference numeral 10 is a case, and the case 10 is placed on the desk 12. The case 10 is partitioned into three rooms by a pair of left and right standing walls 14 and 16. Compatibility wall 14,
A rotary drum 18 is horizontally arranged near the space between the parts 16. A suction fan 20 is housed on the left side of the left standing wall 14, and a blower fan 22 is housed on the right side of the right standing wall 16. A camera unit 24 is arranged on the upper surface of the case 10. In FIG. 4, reference numeral 26 is a document insertion table, 28 is a discharge table, and 30 is an operation panel.

The rotary drum 18 is constructed as shown in FIGS.
That is, a cylindrical metal cylindrical body 32 in which a large number of small holes (diameter of about 2 to 7 mm) are formed with appropriate gaps, and inside the cylindrical body 32, the inside of the cylindrical body 32 is divided into a plurality of chambers. Partition assembly
34 and. On the outer surface of the cylindrical body 32, it is desirable to adhere a porous filter (for example, trade name Vilene HP-21), a breathable thin material member 32a such as cloth, paper or nonwoven cloth.
The partition assembly 34 includes a small-diameter cylinder 36 having one end closed, and five partition plates 38a to 38e extending radially along the longitudinal direction of the 36.
And two partition plates 40 and 42 fixed to the axial end faces of the partition plates 38a to 38e. As a result, the assembly 34 defines four chambers A, B, C, and D that are sandwiched by the partition plates 38a to 38e, and are opened in the radial direction. 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 portion faces the room B serving as a suction part. The small-diameter cylinder 36 of the assembly 34 is provided with a large number of small holes 44 toward the room D which is the peeling portion.
(Fig. 2) is open.

The assembly 34 is inserted into the metal cylinder 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 metal cylindrical body 32, and the other end of the assembly 34, that is, the outer peripheral surface of the opening end of the small diameter cylinder 36 is fixed to the metal cylindrical body 32. Is supported by an end plate 48. The open end of the small diameter cylinder 36 penetrates through the end plate 48 and projects, and is fixed to the standing wall 16 on the right side of the case 10. The end plate 46 is pivotally supported on the left standing wall 14. That is, the bearing cap 50 is fixed to the end plate 46, the closed end of the small diameter cylinder 36 is pivotally supported by the cap 50, and the cap 50 is further pivotally supported by the standing wall 14. As a result, the assembly 34 is fixed, and the metal cylindrical body 32 can rotate in the coaxial position with the assembly 34. Each partition plate 38c to 38e, 40, 42 of the assembly 34
The outer edge of is close to the inner surface of the metal cylinder 32, and the gap between the two is sufficiently small to prevent air leakage. End plate
46 and 48 are screwed to the metal cylinder 32. Also the assembly
34 is fixed so that the room B serving as a suction part is located at the upper left when viewed from the side as shown in FIG.

The suction fan 20 is mounted so as to face the rotary drum 18 with the standing wall 14 interposed therebetween, and sucks the air in the room B through the end plates 46 and the windows 46a, 14a provided in the standing wall 14. The space between the end plate 46 and the standing wall 14 is sealed by a seal tube 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 metal cylinder 32, and the space between the both is hermetically sealed by an appropriate means. For example, a labyrinth seal or a lip seal is used. Therefore, the room B becomes a negative pressure, and the outside air flows into the room B through the small hole of the metal cylinder 32 and the breathable 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 cylinder 36 of the assembly 34 and further supplied to the room D through the small holes 44. Therefore, the air in the room D is discharged to the outside through the small holes of the metal cylinder 32 and the breathable thin material member 32a.

When the operation switch is pressed on the operation panel 30, the metal cylinder 32 is rotationally driven counterclockwise in FIG. 1 by the electric motor 56 at a constant speed. That is, the flat belt 68 is wound around the pulleys 64 and 66 of the motor 56 and the pulley portion integrally formed with the end plate 48 of the rotary drum 18 (see FIG. 2).
The cylinder 32 is rotated by 68. Reference numeral 70 is a feed roller, and 72 is a contact roller rolling on the feed roller. The feed roller 70 is belt driven by a pulley 62. The document inserted from the insertion table 26 is sandwiched between the rollers 70 and 72 and guided above the rotary drum 18.

Since the room B of the rotary drum 18 is sucked to a negative pressure, the original is sucked to the surface of the cylindrical body 32 by a negative pressure. Therefore, the original is attracted to the cylinder 32 and conveyed. Then, when this original portion comes to the room D, since the air is flowing out from the surface of the cylindrical body 32, the original is separated from the rotary drum 18 and is discharged to the discharge stand 28 by the above-mentioned discharged air. Room D here
Air is also sent from the paper discharge fan 74 toward the outer circumference in the vicinity of the discharge table 28 to promote the discharge of the original. Since the paper discharge fan 74 takes in air from around the second mirror 98 described later, it is possible to prevent dust from adhering to the second mirror 98. When the document is carried in above the cylindrical body 32 in this way, the document sensor 76 (FIG. 1) detects this document and starts the photographing of the camera unit 24. As the sensor 76, for example, a reflection type optical sensor can be used.

The camera unit 24 includes a supply reel 78 that supplies the film 77, a take-up reel 80, guide rollers 82 and 84 located between the reels 78 and 80, and a photographing roller 86. A large-diameter pulley 87 is coaxially arranged on the photographing roller 86, and both can be engaged and disengaged by a manual clutch. The large-diameter pulley 87 is driven by a small pulley 61 coaxial with the pulley 60 via a reduction pulley 88. Here, the pulley 60 and the small pulley 61 can be connected and disconnected by an electromagnetic clutch. As a result, when this electromagnetic clutch is connected, the large diameter pulley of the reduction pulley 88 is driven by the belt by the small pulley 61 of the pulley 60, and the small diameter pulley of the reduction 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.
A photographing roller 86 coaxial with 87 is provided on the camera unit 24 side. The camera unit 24 is detachable, and when the camera unit 24 is mounted in the positions shown in FIGS. 1, 4, and 5, the photographing roller 86 and the large-diameter roller 87 are located on the same axis, and both are connected by a manual clutch. To be done. The running / stopping of the film 77 is controlled by the connection / disconnection of the electromagnetic clutch on the pulley 60. The film 77 sent by the shooting roller 86
The traveling speed of is determined according to the reduction rate of the captured image, and is set to 1/24 of the traveling speed of the outer peripheral surface of the rotary drum 18 when reducing to 1/24, for example.

An electromagnetic shutter 90 and a photographing lens 92 are arranged below the photographing roller 86. A light source 94 illuminates the vicinity of the outer periphery of the room B. The image of the original document illuminated by the light source 94 is formed by a first mirror 96 arranged at an upper corner in the case 10 in an obliquely upward direction of the cylindrical body 32 and a second mirror 98 located at the bottom in the case 10. It is reflected and guided to the lens 92. Here the second
The optical axis from the mirror 98 to the lens 92 is almost vertical. Reference numeral 100 is a slit located between the second mirror 98 and the lens 92.

Next, the operation of this embodiment will be described. When the power is turned on by the operation panel 30, each fan 20, 22, 74 starts to operate. Because of this, the room B of the rotary drum 18 becomes a negative pressure, so this room B
While the air is sucked into the room B through the cylindrical body 32 and the thin member 32a on the surface thereof within the range of, the positive pressure is applied to the room D, so that the air is discharged from the surface of the thin member 32a within the range of the room D. It When the shooting switch is pressed by the operation panel 30, the motor 56 is operated and the drum 18 is rotated. When a document is inserted from the insertion table 26, it is sent above the drum 18 by the rollers 70 and 72. At this time, the sensor 76 detects the beginning and the end of the document,
Starts / stops the feeding of the film 77 by connecting / disconnecting the electromagnetic clutch. 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 enters the film 77.

At this time, the sensor 76, the film 77, and the shutter 90 are operated in such a manner that when the sensor 76 detects the beginning of the document, the electromagnetic clutch is connected and the film 77 starts to move.
After the movement of 77 starts, the shutter 90 is opened slightly later. When the sensor 76 detects the end of the document, the shutter 90 is closed, and the film 77 is stopped after this.

When the manuscript reaches the range of the room B, it is adsorbed on the surface of the drum 18 and travels together with the cylindrical body 32 for photographing. When the document reaches the range of the room D, the air is flowing out from the drum surface, so the document is separated from the drum surface, and the fan 74
Is also sent to the discharge table 28 by an air flow.

Since the cylindrical body 32 is rotating, even if dust adheres to the surface in the range of the room B, the dust is removed in the range of the room D, and the thin member 32a is less likely to be clogged.

In this embodiment, since the room C is provided between the room B which is the suction section and the room D which is the peeling section, the air flowing out from the surface of the thin member 32a in the range of the room D is thin in the range of the room B. The flow from the surface of the member 32a to the room B is reduced, and the inconvenience that the separated original in the range of the room D is folded back toward the room B does not occur.

(Effect of the Invention) As described above, according to the present invention, a document is conveyed by suctioning the document to the surface of the cylinder by the negative air pressure of the suction unit, and at the peeling unit provided on the downstream side of the suction unit in the rotation direction. The original is peeled from the surface of the cylinder by the discharged air, and the separated fan guides the separated original to the original discharge tray by the air flow sent from the separating section toward the original discharge tray. The paper will be fed smoothly to the surface of the cylinder, and it will not easily jam, break, bend, etc., and will be smooth and stable even if it is a thin document, a small document, or a document that is prone to static electricity. Can be transported. Further, since the original is conveyed in close contact with the cylinder, the conveying speed is always stable, and the finished quality of the film can be improved.

Further, if a breathable thin member such as a filter is attached to the surface of the rotary drum, a negative pressure is uniformly applied to the document to be sucked on the surface, and it is possible to prevent the document from being wrinkled or uneven. For this reason, even if the small hole diameter of the cylindrical body is large or the interval between the small holes is large, it is possible to hold the surface of the original document smoothly for photographing.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II showing the structure around the rotary drum, FIG. 3 is an exploded perspective view of the rotary drum, and FIG. 4 is an apparatus. FIG. 5 is an overall external view, and FIG. 5 is a front view showing the arrangement of the rotary drum and the like. 18 ... Rotating drum, 32 ... Cylinder, B ... Suction room, C ... Buffer room, D ... Peeling room

Claims (2)

(57) [Claims] 1. An image of an original document conveyed at a constant speed is photographed on a microfilm moving at a constant speed reduction ratio with the original image. A cylindrical body having a large number of small holes and at least reading of the cylindrical body. A suction unit that sucks outside air inward from the surface of the cylinder and conveys the original in close contact with the surface of the cylinder in a predetermined range including the range,
A peeling section located downstream of the suction section in the rotational direction of the cylinder for ejecting air from the cylinder surface to separate the original from the cylinder surface, and air is sent from the vicinity of the peeling section to the document discharge table at the peeling section. A rotary camera for photographing a microfilm, comprising a paper discharge fan for guiding a separated document to a document discharge port. 2. The rotary camera for photographing a microfilm according to claim 1, wherein a dense and breathable thin member is mounted on the surface of the cylindrical body.