JPH10133295A - Film carrying and reading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the rotational followup ability of carrying rollers with respect to a film and to prevent the occurrence of the damage of the film by providing a power transmission means for synchronously rotating a contact roller and a driving roller at the same circumferential speed. SOLUTION: A pair of the carrying rollers 12 consist of the driving roller 13 and the contact roller 14 and this roller 14 is pressed upward by an elastic member, so that a pair of the carrying rollers 12 hold/carry a roll of film by the friction. A pair of gears 30 as the power transmission means are set to make the circumferential speed of the driving roller coincident with that of the contact roller, so that the driving roller 13 and the contact roller 14 are completely, synchronously rotated. Since the driving roller 13 and the contact roller 14 are synchronously rotated by the connection of the gears, even if the coefficient of friction of the surface layer of the contact roller 14 is small, the followup ability of the contact roller 14 with respect to the film is remarkably improved and the occurrence of the damage of the film caused by sliding between a pair of the carrying rollers 12 and the film can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film reader mounted on an image projection device such as a reader printer and a film transport device used for the film reader.

[0002]

2. Description of the Related Art In general, a micro reader printer enlarges an image photographed and recorded on a microfilm, displays the image on a display device such as a screen or a CRT, and allows the user to view the enlarged image. The light receiving sensor such as a photosensitive drum or a CCD, which is a photoreceptor, is irradiated to form a copied image.

[0003] As a form of a microfilm used in such an image projection apparatus, a sheet-like film such as a microfish, an aperture card, a film jacket or the like and a sheet film and an open reel type or a cartridge type band-like film or roll are available. They can be roughly divided into films.

[0004] A film transport device called a carrier is used to hold the sheet film and the roll film and to search and browse necessary information from recorded images.

[0005] The film transport device includes a sheet film transport device exclusively using a sheet film, a roll film transport device exclusively using a roll film, and a sheet / roll dual-purpose film transport device capable of using both a sheet film and a roll film. is there.

[0006] Among them, a roll film carrier shown in Fig. 3 is a conventional example of a film transporting apparatus that can use a roll film.

In the conventional example shown in FIG. 3, 101 is an upper pressure plate glass, 102 is a lower pressure plate glass, 103 is a main frame, 103b is a slide handle, 104 is a supply side guide roller, 105 is a winding side guide roller, and 106 is a drive. A transport roller pair including a roller 106a and a contact roller 106b, 107 is a slide rail, 108 is a slide bearing, 109 is a base frame, 118 is a supply reel shaft, 119 is a take-up reel, 120 is a take-up lever, 121
Denotes a guide plate, and 122 denotes a supply reel.

In the above-mentioned conventional example, when the roll film wound on the supply reel 127 is loaded, it is configured to be able to perform semi-auto loading.

That is, the supply reel 127 is inserted into the supply reel shaft 118, the roll film wound around the supply reel 127 is pulled out, and the guide roller 104 is pulled out.
When the leading end of the film is clamped between the pair of transport rollers 106, the insertion is detected and automatically or by pressing a start switch (not shown), the leading edge of the film is clamped and transported by the pair of transport rollers 106. Upper pressure plate glass 1
01 and the lower pressure plate glass 102, between the guide plates 121,
The paper is wound around a take-up reel 119 under the guidance of a take-up lever 120 via a guide roller 105 and a guide roller 105.

When the semi-auto loading is completed,
The image on the film held between the upper pressure plate glass 101 and the lower pressure plate glass 102 is enlarged and projected by a reader printer (not shown) or the like, and can be viewed and searched.

Thereafter, the search of the roll film in the left-right direction can be performed by operating a controller (not shown) and reciprocating the roll film between a supply reel and a take-up reel.

On the other hand, the search of the roll film in the front-back direction can be performed by transferring the main frame.

[0013]

However, in the conventional example shown in FIG. 3, when the roll film is conveyed, particularly when the speed change is large, such as a change from a high speed to a low speed, or a change to a stop, the conveyance is performed. There is a problem that the rotation followability of the transport roller to the film is reduced due to the inertial rotation of the roller.

That is, during the transport of the film, the transport roller pair sandwiches the film, so that the drive roller and the contact roller are separated from each other, and the followability of the roller and the film is determined by the frictional force between the drive roller and the film, the contact roller And the friction between the film.
As described above, since the surface layer of the contact roller has a low coefficient of friction as described above, the rotation followability of the contact roller with respect to the film is deteriorated, and the contact roller and the film tend to slip.

[0015] If the contact roller and the film slide, the contact roller will damage the film.

Therefore, in the prior art, complicated speed control was performed so as not to cause a sudden speed change in the deceleration stage. For this reason, the transport speed and search speed of the apparatus have been reduced.

The present invention has been made to solve the above-mentioned problems of the prior art.
Improves the rotation followability of the transport roller to the film when the roll film is transported from a high speed to a low speed or when the deceleration change during stop is large, reduces the occurrence of film scratches due to the inertial rotation of the transport roller, and reduces the film transport. It is to simplify speed control.

[0018]

According to the present invention, there is provided a film reading section for reading information recorded on a film, and a film supply section for supplying the film to the film reading section. A film winding unit that winds the film supplied from the film supply unit and passed through the film reading unit, and a film conveyance unit that conveys the leading end of the film supplied from the film supply unit to the film winding unit through the film reading unit. Wherein the film transport unit includes a transport roller pair including a drive roller connected to a drive source and a contact roller provided at a position in pressure contact with the drive roller, the contact roller, Power transmission means for synchronously rotating the driving roller with the same peripheral speed is provided.

Therefore, in the film transport apparatus configured as described above, since the drive roller and the contact roller are connected by the power transmission means, the drive roller and the contact roller are connected to each other even when the transport roller pair is nipping and frictionally transporting the film. Since the contact roller always rotates synchronously, the rotation followability of the contact roller to the film is remarkably improved.

Accordingly, even when the speed of film transfer is changed from a high speed to a low speed, or when the speed of film transfer is suddenly stopped, the contact roller follows the transfer of the film even when the speed greatly changes. The rotation between the contact roller and the film is reduced due to the rotation, and the occurrence of film damage due to the inertial rotation of the contact roller can be suppressed.

Further, since speed control can be easily performed, time wasted due to deceleration control is reduced, high-speed retrieval of film images is realized, and performance of the apparatus is remarkably improved.

The power transmission means is a pair of gears provided on each of the drive roller and the contact roller and meshing with each other.

Thus, the driving roller and the contact roller can be reliably synchronized with each other with a simple mechanism.

After the leading end of the film supplied from the film supply section reaches the film take-up section, the drive roller is controlled to stop driving and to follow the film.

Thus, when the film winding section winds up the film, there is no need to synchronize the film with the drive roller, and there is no conveyance jam when the film is not synchronized well.

A rotation detecting member is provided on one of the conveying roller pairs. It is also preferable that control means is provided for detecting the rotation of the transport roller pair when the leading end of the film is inserted between the transport roller pairs by a rotation detecting member and driving the drive roller in accordance with the detection result. is there.

[0027] With this, it is possible to function as a film supply speed detecting means at the time of reading the film, to control the film supply speed with high precision, and to feed the film set in the film supply section to the film take-up section. By simply inserting the film between the pair of transport rollers, the rest can be performed automatically.

Further, a film reading apparatus is provided with the above-mentioned film transport apparatus and reading means for reading information recorded on the film.

[0029]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The material, shape, relative arrangement, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

(Embodiment) FIG. 1 is a perspective view of a film transport device of the present invention, and FIG. 2 is a schematic perspective view of a transport roller in the film transport device of the present invention.

In FIG. 1, 1 is a main frame, 2,
Reference numeral 3 denotes a pair of transparent plates as the film reading unit 20, 2 denotes an upper pressure plate glass, 3 denotes a lower pressure plate glass, and 2 denotes an upper pressure plate glass.
Are fixed horizontally to the main frame 1.
The lower pressure plate glass 3 moves toward and away from the upper pressure plate glass 1 by a combination of a solenoid and a spring (not shown).

4 is a base frame, 5 is a slide rail provided on the base frame 4, and 6 is a main frame 1.
, A slide handle disposed on the main frame 1. The main frame 1 is movable in the front-rear direction with the slide rail 5 and the slide bearing 6 as guides. Can be transferred manually.

Reference numeral 21 denotes a film supply unit, which includes 8 as a supply reel shaft, 9 as a rewind motor for rotating the supply reel shaft, and 10 as a roll film supply reel (open reel). The supply reel 10 rotates integrally with the reel shaft 8 by hooking the projection 8 a of the supply reel shaft 8 in a groove (not shown) in the center hole of the supply reel 10.

Reference numeral 51 denotes a supply unit rotation detecting device fixed to the supply reel shaft 8, reference numeral 52 denotes an encoder plate, and reference numeral 53 denotes a sensor for reading the rotation of the encoder plate.

Reference numeral 11 denotes a supply-side guide roller as guide means for a roll film. Reference numeral 22 denotes a film transport section 22 for transporting the film to a film reading section 20. It is a transport roller pair for sending out to the winding unit.

As shown in FIG. 2, the transport roller pair 12 includes a drive roller 13 and a contact roller 14, and the contact roller 14 is pressed upward by an elastic member (not shown). , And are conveyed by friction.

In FIG. 2, reference numeral 13a denotes a surface layer of a driving roll formed of a material having a large friction coefficient, such as rubber.
b is a gear provided at an end of the drive roller, 13c is a drive roller shaft, 14a is a surface layer of a contact roller formed of a resin having a small coefficient of friction, 14b is a gear provided at an end of the contact roller, 14c is a contact On the roller shaft, the drive roller gear 13b as the gear pair 30 as the power transmission means meshes with the contact roller gear 14b.

The number of teeth of the gears 13b and 14b is set so that the peripheral speed of the drive roller and the peripheral speed of the contact roller coincide with each other. Therefore, the drive roller 13 and the contact roller 14 rotate completely synchronously because the gears are set so as not to be disconnected.

The leading end of the roll film passes between the pair of transparent plates 2 and 3 by the transport roller pair 12. That is, the reference numeral 12 forms a film insertion port for sending out the film toward the winding section.

Reference numeral 15 denotes a delivery motor for rotating the drive roller 13, and reference numeral 16 denotes a clutch for switching connection and disconnection between the delivery motor 15 and the drive roller shaft 13c.

Reference numeral 17 denotes a transport unit rotation detecting device fixed to the drive roller shaft 13c, reference numeral 18 denotes an encoder plate, and reference numeral 19 denotes a sensor for reading the rotation of the encoder plate.

In the case of the loading operation (until the film wound on the supply reel is wound on the take-up reel), the clutch 16 is turned on, and the transport roller pair 12 is driven to feed the film.

On the other hand, in cases other than the loading operation, the clutch 16 is turned off, and the transport roller pair 12 rotates with the transfer of the film.

Reference numeral 23 denotes a film take-up unit for winding the film supplied from the film supply unit 21 and passing through the film reading unit 20. Among them, reference numeral 24 denotes a take-up side guide roller as a roll film guide means; Is a film take-up reel, 25a is a take-up shaft for rotating the take-up reel, 26 is a take-up lever, and the take-up lever 26 is pressed against the take-up core 25b of the take-up reel 25 by a spring (not shown). And take up the end of the roll film on take-up reel 2
5 is guided for reliable winding on the winding core 25b.

Reference numeral 27 denotes a take-up motor for rotating the take-up reel 26. Reference numeral 28 denotes a film formed between the pressure plate glasses 2 and 3 and the take-up side guide roller 24. Is a guide plate for guiding the user.

Reference numeral 54 denotes a winding section rotation detecting device fixed to the winding shaft 25a, 55 is an encoder plate, and 56 is a sensor for reading the rotation of the encoder plate.

In the above configuration, the film transport operation will be described.

After the supply reel 10 around which the roll film is wound is set on the supply reel shaft 8, the roll film is pulled out from the supply reel and hung on the guide roll 11, and the leading end of the film is inserted into the insertion opening of the transport roller pair 12. Pinch it. At this time, since the transport roller pair 12 is not driven (the clutch 16 is OFF), the transport roller pair 12 is rotated by the insertion of the film.

The transport unit rotation detector 17 detects the transport roller pair 12
A control means (not shown) is provided such that when the rotation of the conveying roller is detected, the conveying roller pair 12 is switched to the driving state (the clutch 16 is ON).

Then, the transport roller pair 12 is rotated by the driving of the delivery motor 15, and the winding reel 25 is rotated by the driving of the winding motor 27.

The leading end of the film is sent out by the transport roller 12, and the roll film is fed to the take-up reel 25 along a predetermined path.

When the leading end of the roll film is fed to the take-up reel 25, the leading end of the roll film is automatically wound around the take-up core 25 b of the take-up reel 25 by the operation of the take-up lever 26.

When the roll film is wound around the take-up reel 25, the transport roll pair 12 is set in a non-driving state (the clutch 16 is turned off), and the sending motor 15 is controlled so as not to operate.

Then, the roll film is taken up by the take-up reel 25.
Is transported sequentially from the supply reel 10 to the take-up reel 25, and the transport roller pair 12 rotates together with the transport of the roll film.

When the roll film is to be rewound to the reel 10, the winding motor 27 is deactivated, and when the rewind motor 9 is driven, the reel 10 rotates in the direction of winding the roll film and the roll film is wound around the reel 10. Will be returned.

Therefore, by driving either the take-up motor 27 or the rewind motor 9, the roll film is conveyed between the supply reel 10 and the take-up reel 25 so as to be able to reciprocate and transfer the main frame 1. Thus, the roll film is conveyed so as to be able to reciprocate in the short direction of the film, so that desired image information recorded on the roll film can be searched or browsed.

In the above operation, the drive roller and the contact roller rotate synchronously by the connection of the gears. Therefore, even if the friction coefficient of the surface layer of the contact roller is small, the followability between the contact roller and the film is remarkably improved. Of film scratches due to slippage between the film and the film can be reduced.

Further, in a film reading apparatus provided with reading means for reading information recorded on the film, the film transport apparatus is applied, and the film is read by the film reading section, so that the film can be read in a state where the film is not damaged. Information can be read, and a high-performance film reader can be provided. (Other Embodiments) In this embodiment, a gear is provided as the power transmission means. However, the drive roller and the contact roller may be synchronized by a belt.

[0059]

As described above, according to the present invention, the following effects can be obtained.

(Claim 1) A film reading section for reading information recorded on a film, a film supply section for supplying the film to the film reading section, and a film supplied from the film supply section to the film reading section. In a film transport device having a film take-up unit to take and a film transport unit that transports a leading end of a film supplied from a film supply unit to the film wind unit, the film transport unit includes a drive roller and a drive roller. A contact roller and a power transmission means for rotating the contact roller in synchronization with the drive roller are provided. The slip between the film and the film is reduced, and the film is damaged by the inertial rotation of the contact roller. It can be suppressed.

Further, since the speed control can be easily performed, the time wasted due to the deceleration control is reduced, the high-speed retrieval of the film image is realized, and the performance of the apparatus is remarkably improved.

(Claim 2) Since the power transmission means is provided on each of the drive roller and the contact roller and is a pair of gears meshing with each other, the drive mechanism and the contact roller are reliably synchronized with a simple mechanism. be able to.

(Claim 3) After the leading end of the film supplied from the film supply section reaches the film take-up section, the drive roller is controlled so as to stop driving and follow the film. When the take-up unit winds up the film, there is no need to synchronize with the drive roller, and there is no conveyance jam in cases where synchronization is not good.

(4) Since a rotation detecting member is provided on one of the conveying roller pairs, it can function as a film supply speed detecting means at the time of reading the film, and the sharing speed of the film can be precisely controlled. Can control. When a rotation detecting member detects the rotation of the pair of transport rollers when the leading end of the film is inserted between the pair of transport rollers, and a control unit that drives the drive roller in accordance with the detection result, the film supply unit When the film set in is fed into the film winding section, the film can be automatically inserted only by inserting the film between the pair of transport rollers.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a film transport device to which the present invention is applied.

FIG. 2 is a schematic perspective view of a transport roller pair in a film transport apparatus to which the present invention is applied.

FIG. 3 is an external perspective view of a conventional film transport device.

[Explanation of symbols]

 1,103 Main frame 2,101 Upper pressure plate glass 3,102 Lower pressure plate glass 4,109 Base frame 5,107 Slide rail 6,108 Slide bearing 7,103b Slide handle 8,118 Supply reel shaft 9 Rewind motor 10,122 Supply reel 12, 106 Conveying roller pair 13, 106a Driving roller 13b Gear 14, 106b Contact roller 14b Gear 15 Delivery motor 16 Clutch 17, 51, 54 Conveyor rotation detection device 18, 52, 55 Encoder plate 19, 53, 56 Sensor REFERENCE SIGNS LIST 20 film reading section 21 film supply section 22 film transport section 23 film winding section 24, 105 winding side guide roller 25, 119 winding reel 26, 120 winding lever 27 winding motor 28, 121 guide plate 30 gear pair

Claims (6)

[Claims] A film reading section for reading information recorded on the film; a film supply section for supplying the film to the film reading section; a film supplied from the film supply section and passing through the film reading section. A film take-up unit that takes a film, and a film film conveyance unit that conveys the leading end of the film supplied from the film supply unit to the film take-up unit through the film reading unit. A power transmission unit for synchronously rotating the contact roller and the drive roller at the same peripheral speed, comprising a transport roller pair including a connected drive roller and a contact roller provided at a position in pressure contact with the drive roller. A film transport device characterized by being provided. 2. A film transport apparatus according to claim 1, wherein said power transmission means is a pair of gears provided on each of said drive roller and said contact roller and meshing with each other. 3. The drive roller according to claim 1, wherein the drive roller is controlled so as to stop driving and follow the film after the leading end of the film supplied from the film supply section reaches the film winding section. Item 3. The film transport device according to item 1 or 2. 4. The film transport device according to claim 1, wherein one of said transport roller pairs is provided with a rotation detecting member. 5. A control means for detecting the rotation of the pair of transport rollers when the leading end of the film is inserted between the pair of transport rollers by the rotation detecting member, and driving the drive roller in accordance with the detection result. The film transport device according to claim 4, further comprising: 6. A film reading device, comprising: the film transport device according to claim 1; and reading means for reading information recorded on a film.