JP2511295B2 - 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. Especially, when the thickness of the document to be input is small or the size is small, such a problem is likely to occur. Also, depending on the original, static electricity is easily generated,
There is also a problem that it becomes more difficult to smoothly convey and discharge a document when static electricity is generated.

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 jams, breakage, and bending of documents are less likely to occur, and problems such as static discharge of documents not becoming smooth do not occur, and the transport speed does not become unstable even for long-term use. It is an object of the present invention to provide a rotary camera for photographing a micro film, which can improve the finish quality of the film.

(Construction of the Invention) According to the present invention, an object is to convey an original while closely contacting it with a cylindrical body that rotates at a constant speed, and to take an image of the original on a microfilm that moves at a constant reduction ratio with the original. , A cylindrical body having a large number of small holes, a suction unit for sucking outside air inward from the surface of the cylindrical body in a predetermined range including at least the reading range of the cylindrical body, and a downstream side of the suction unit in the rotational direction of the cylindrical body. Located between the suction unit and the peeling unit that discharges air from the surface of the cylindrical body, and the flow of air from the surface of the cylindrical body is restricted so that the air is discharged from the peeling unit and sucked. With a cushioning part that suppresses the air flow sucked into the part and prevents the document from being entrained, the document is conveyed by rotating the cylinder while keeping it in close contact with the surface of the suction part of the cylinder only by the negative suction pressure of the suction part. And remove the original from the surface of the cylinder at the peeling section. It is achieved by a rotary camera for photographing a microfilm, which is characterized in that it is separated and discharged.

Here, it is desirable to prohibit the inflow and outflow of air in the buffer section. Further, it is desirable that the amount of outflow of air in the peeling portion gradually increases in the rotation direction of the tubular body.

(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, 26 is an original input 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 removable, 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. Since there is no inflow or outflow of air in room C, the manuscript is
In the range of, the cylinder 32 is not sucked. For this reason,
The suction force for the original document to the cylindrical body 32 disappears, and it serves as a buffer for preparing for the next peeling in the room D. Manuscript is room D
In the range, the air is flowing out from the drum surface, so the original is separated from the drum surface, and the air discharged from the fan 74 is also added to the discharge table 28 so that the original is smoothly sent.

Consider a case where there is no room C as a buffer between the room D serving as the peeling section and the room B serving as the suction section. In this case, the air discharged from the room D is short-circuited and flows into the adjacent room B when there is no document, and the air flows from the room D to the room B. If the leading edge of the document suddenly enters room D from room B under this condition, the leading edge of the document is caught in the air flow. The involvement of the original document is remarkable especially when the original document is thin or small. For this reason, there is a possibility that a conveyance failure such as a jam of the document occurs or the document is damaged.

However, by providing the room C as a buffer between these rooms B and D, the flow of air from the room D to the room B is suppressed, and the front end of the document is less likely to be caught. Therefore, the document is not jammed or damaged.

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.

FIG. 6 is a sectional view showing an embodiment of another partition assembly 134. In this embodiment, a baffle plate is provided in the room D that serves as a peeling section.
138f, g, h are provided so that the air flowing out from the surface of the cylinder (not shown) gradually becomes stronger in the direction of rotation of the cylinder. The small holes 144 of the small diameter cylinder 136 may be inclined so as to eject air in the rotation direction of the cylindrical body together with or instead of the baffle plates 138f, g, h.

In this way, by making the outflow of air in the peeling section gradually stronger toward the rotating direction of the tubular body, the air flowing out from the surface of the tubular body of the room D, which is the stripping section, becomes the room B that is the suction section. It is possible to more reliably suppress the short-circuit and flow on the cylindrical body surface. Therefore, there is no inconvenience that the document peeled off in the range of the room D is folded back to the room B side.

(Effects of the Invention) As described above, according to the present invention, a document is conveyed by suctioning the document onto the surface of the cylinder by the negative air pressure of the suction unit, and the buffer unit downstream of the suction unit in the rotation direction stores the document. The suction is stopped, and the original is separated from the cylinder surface by the discharge air and discharged from the separation section on the downstream side. Therefore, the original is brought into close contact with the cylinder surface by the suction section and is fed smoothly. At the same time, suction is released from the buffer section to prepare for peeling, and the peeling section smoothly peels. In this way, the buffer section prevents a sudden pressure change from being applied to the document between suction and separation of the document, so that the flow due to the short circuit of air from the separation section to the suction section is suppressed, and the front of the document is suppressed. The edges are less likely to be rolled up, and the originals are less likely to be jammed, damaged, bent, etc., so that even thin originals, small originals or originals that easily generate static electricity can be smoothly conveyed.
Further, since the roller and the belt are not used to press the document against the cylinder, even a thin document or a document having a small size can be smoothly held in close contact with the cylinder and conveyed without causing a jam. The film can be conveyed, 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.

Further, by making the outflow of air gradually stronger in the peeling direction in the rotation direction, it is possible to more reliably prevent air from wrapping around from the cylinder surface of the peeling section to the cylinder surface of the suction section. It can be transported smoothly.

[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. FIG. 6 is a sectional view showing another embodiment of the partition assembly. 18 ... Rotating drum, 32 ... Cylinder, B ... Suction room, C ... Buffer room, D ... Peeling room

Claims (4)

(57) [Claims] 1. A document in which a document is conveyed while being in intimate contact with a cylinder that rotates at a constant speed, and an image of the document is photographed on a microfilm that moves at a constant reduction ratio with the document, and a large number of small holes are formed. A cylindrical body, a suction unit that sucks outside air inward from the cylindrical body surface within a predetermined range including at least the reading range of the cylindrical body, and air that is located downstream of the suction unit in the rotational direction of the cylindrical body from the cylindrical body surface. Located between the suction part and the peeling part to be discharged, the outflow / inflow of air from the surface of the cylinder is restricted, and the air flow discharged from the peeling part and sucked into the suction part is suppressed. With a buffer section for preventing the original from being caught, the original is brought into close contact with the surface of the suction section of the cylinder by only the suction negative pressure of the suction section and conveyed by rotation of the cylinder, and at the peeling section the original is transferred to the cylinder. Characterized by peeling from the surface and discharging Rotary camera for micro film photography. 2. The rotary camera for photographing a microfilm according to claim 1, wherein a dense and breathable thin material member is attached to the surface of the cylindrical body. 3. The rotary camera for photographing a microfilm according to claim 1, wherein the buffer section is prohibited from flowing in and out of air. 4. The microfilm photography according to claim 1, wherein the amount of air outflowing from the surface of the cylindrical body in the peeling section is set to gradually increase as the distance from the buffer section increases. Rotary camera.