JPS62276954A - Carrier for picture scanning reading recording device and picture original scanning - Google Patents

Abstract

PURPOSE:To attain stable picture reading and to make the positioning accurate by adopting the constitution wherein picture recording is applied based on picture information and the picture recording start position is always made constant in forming a halftone film. CONSTITUTION:Original mount 300 is supplied from an original platen to a carrying system and a mount body 302 comes to a prescribed position, then a pin member 244 is projected to receive the tip of the original mount 300, an edge liner is energized to shift the mount 300 at the rising wall of a case. When the mount body 302 reaches a read start position, the tip of the pin member is fitted in holes 306a, 306b of the mount, a board 304 is attracted to save the pin member 244 and to save also the pin member of the shift device, a slide body 134 is carried along the guide member and the picture original 400 is scanned by a laser light.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention The present invention relates to an image scanning reading/recording device and a carrier for scanning an image original. The present invention relates to an image recording/reading/recording device that enables image recording, reading, and recording, and a carrier for scanning an image original therefor.

In recent years, image scanning reading and recording devices have been adopted in the fields of printing and plate making to create film master plates by reading image information drawn on manuscripts and electrically processing them for the purpose of streamlining work processes and improving image quality. It has come to be.

This image scanning reading/recording device basically consists of an input section, a control section, and an output section.

That is, in the input section, a reflective photo original or line drawing original is scanned with a light beam and detected by a photomultiplier, or a CCD (charge couple) is used.
d device) A camera reads the image and converts the image information of the document into an electrical signal according to the strength of the reflected light. Next, the image information photoelectrically converted by the input section is subjected to arithmetic processing in the control section to perform gradation correction, halftone separation, etc. according to the plate-making conditions. The image information processed by the control section is converted into an optical signal made of laser light at the output section, and the laser light is irradiated onto a record carrier made of a photosensitive material to record a desired image. moreover,
After the image recording is completed, the recording carrier is subjected to a development process and is finally used for printing or the like as a film original plate.

Therefore, in view of the above configuration, it is desirable that this type of image scanning reading/recording device be adopted not only in the field of color printing but also in the field of monochrome printing.

In view of these points, the applicant has developed a single-color scanner that improves work efficiency and improves image quality all at once.

The outline has already been published in the journal of the Institute of Image Electronics Engineers, etc. In particular, this scanner transports the original attached to a flat moving plate through a transport mechanism without bending it, and reads the image using a laser beam, making it popular in the market as a flatbed scanner. is gaining.

However, when using the above-mentioned image scanning reading/recording device to express a continuous-tone original with a monochrome halftone image, it becomes necessary to create two kinds of halftone films with different screen angles. This has the effect of making moiré mesh less noticeable during plate making, and
This is because this has the advantage of producing a solid finish that is close to the original original, and making it possible to perform high-quality printing.

Therefore, in an image scanning reading/recording device, when trying to make two types of mesh films with different screen angles as described above, an image recording carrier such as a film is sandwiched and conveyed between an image recording drum and a nip roller. In the process, a first mesh film is made with a predetermined screen angle, and then a second mesh film is made with a different screen angle.

During printing, these two types of mesh films are used to overlap each other twice. Therefore, in order to print overlappingly using two types of mesh films with the same image, it is inevitable that the respective images of the two mesh films must always be defeated when they are superimposed. come out.

On the other hand, in order to obtain mesh films with different screen angles as described above, it is natural that the document on which the image is drawn must be read and scanned twice with a laser beam or the like.

To do this, it is necessary to use a second film with a different screen angle from the original image reading start position for creating the first halftone film.
It is necessary to match the document image reading start positions for creating the second halftone film almost exactly. If this is not done, the images on each mesh film will be misaligned, and therefore, even if two types of mesh films are used to print twice, accurate halftone dot images will not be obtained.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to accurately set the image document reading start position at a predetermined position, and also to accurately convey the document so that image reading can be performed stably and accurately. An object of the present invention is to provide a scanning reading/recording device and a carrier for scanning an image original.

Therefore, in order to achieve the above object, the present invention conveys an image original scanning carrier in the sub-scanning direction and scans the image original on the carrier in the main scanning direction with a first light beam to scan the image original on the carrier. The image information is read, the image signal thus obtained is processed, and a second light beam for image recording is modulated by this and irradiated onto the photosensitive material as a mesh signal, thereby recording the image. The scanning reading/recording device engages the carrier with a conveyance system that conveys the carrier in the sub-scanning direction to specify a scanning start position of the image original, and also moves the carrier to the image original in synchronization with the drive of the conveyance system. The present invention is characterized in that it is configured to include an image original positioning mechanism that transports the image original to the scanning end position.

Furthermore, the present invention provides a flat carrier body on which an image document is mounted, an engaging means disposed on the carrier body to engage with an image document positioning mechanism and to be conveyed in the sub-scanning direction; It is characterized by comprising a position display means for essentially specifying the position of the image original on the carrier body.

Next, preferred embodiments of the image scanning reading/recording apparatus and the image document scanning carrier used therein according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates an image scanning reading/recording device according to the present invention, and the image scanning reading/recording device 10 basically includes an input section 12, a control section 14, and an output section 16. include. The document table 18 constituting the input section 12 includes an endless conveyor belt 20 and a digitizer 22.
A document paper transport system 24 is provided at one end of the transport belt 20. In fact, the manuscript paper transport system 24
are belts 26a arranged in parallel and oriented in the horizontal direction;
26b126c and 26d, belts 26b and 2
6c, there is a document mount positioning mechanism 28 according to the present invention.
is installed.

As shown in FIGS. 1 and 2, belts 26a to 2
6d is suspended by rotating shafts 30 and 32 separated by a predetermined distance, and a pulley 36 is fitted to one end 34 of the rotating shaft 30. The pulley 36 is conveyed in the sub-scanning direction via a belt 38 by a motor (not shown). In this case, it is preferable to attach a one-way clutch to the rotational drive shaft of the motor.

Note that a light detection means 41 consisting of a light emitting section 39 and a light receiving section 40 is disposed between the rotation shaft 30 and the rotation shaft 32, and a document mount 300, which will be described later, is used for positioning the bells I-26a to 26d and the document mount. When transported by the mechanism 28,
It is configured to detect its passage. Rotating shaft 30
On one side, there are belts 26a to 26 from the original table 18.
A document holder 42 is provided for receiving a document holder 300 conveyed via a document mount 300 or the like.

An image reading system 5 is installed above the transport system 24 configured as described above.
0 is set. The image reading system 50 includes a laser light source 52, and a light modulator 54, a galvanometer mirror 56, and a scanning lens 58 are provided on the output side of the laser light rJ, 52.
and a half mirror 60 are provided. Furthermore, a light guide 6 made of a light guide sheet is provided along the main scanning line at the scanning position of the laser beam emitted from the laser light source 52 on the document.
2 is disposed, and an image sensor, for example, a photomultiplier 64, is mounted above the light guide 62.

Furthermore, the laser light passing through the half mirror 60 reaches the output section 16.

Next, as shown in FIG. 1, a photosensitive material supply magazine 66 constituting the output unit 16 is attached to the upper part of the housing constituting the RE equipment W10, and the inside of the magazine 66 has a long A long photosensitive material, for example, film F is loaded. Substantially in the vicinity of the magazine 66 is a film F.
A roller pair 70 is provided slightly below the roller 6 and utilizing a corner of the casing of the device 10. A guide roller 72 is further rotatably disposed below the roller pair 70, and a loop detector 74 consisting of a light emitter 75a and a light receiver 75b for detecting the film F hanging down in a loop shape is disposed. be done. Furthermore, guide rollers 76 and 78 are disposed above the loop detector 74. A meandering amount detector 80 is provided between the guide rollers 76 and 78 to detect the amount of meandering of the film F.

A rotating drum 82 is provided below the guide roller 78, and the rotating drum 82 is rotatable by a pulley 86 and a heald 87, which are pivotally supported by the rotating shaft of an image recording motor 84. Note that a nip roller 88.90 is provided opposite to the rotating drum 82, and the nip roller 88.90 can be moved away from or close to the rotating drum 82 by a solenoid 92.94. Rotating drum 8
2 and a pair of cutters 9 below the nip roller 90.
6a, 96b are arranged, and these cutters 96a,
Guide members 98a and 98b are provided below 96b. The tips of the guide members 98a and 98b face the opening 100a of the photosensitive material receive magazine 100, and a pair of rollers 102 is located below the opening 100a.
A curved guide plate 104 is also provided. Of course, this receive magazine 100 can be easily taken out from the device IO.

Therefore, in the above configuration, the document paper transport system 2
The document mount positioning mechanism 28 incorporated in 4 will be described in more detail.

As shown in FIG. 3, the document mount positioning mechanism 28 is disposed in a cylindrical body 110 together with bells 26a to 26d. 112a, 112b and 114 are erected. The pillars 112a, 112b and 114 are respectively provided with notches 116a, 116b and 118, which descend downward so as to spread out from each other, near their upper ends. Plate-shaped supports 120a to 120e are erected between the columns 112a, 112b and the column 114 in a direction perpendicular thereto. Furthermore, pillar IL2a, 112b
A column 130 is erected between the column 114 and the support 120a, and a column 130 is provided between the column 114 and the support 120e.
1 will be erected. In this case, a guide member 132 is bridged between the pillars 130 and 131. The guide member 1
A sliding body 134 is displaceably mounted on 32.

On the other hand, holes are formed near the upper ends of the supports 120a to 120e, and the first rod 136 and the second rod are inserted into these holes.
The rod 138 is inserted through the rod 138. In this case, the 10th nd 1
A locking member 140 is fixed to the substantially central portion of 36, and a locking member 142 is fixed to the 20th prong 138. Note that a first coil spring 144 is interposed between the locking member 140 and the support body 120a, and a second coil spring 144 is interposed between the locking member 140 and the support body 120a.
A second coil spring 146 is interposed between the locking member 142 and the support body 120d. Support body 120b, 1
Rods 13 are located near the upper ends of 20c and 120e, respectively.
6. Guide member 147 for freely displacing 138
A to 147C are installed. A third rod 148 is rotatably supported at one end of the tenth hood 136, and a tension pulley 152 is pivotally attached to one end of the thirtieth hood 148 via a shaft 150. On the other hand, the second
A fourth rod 154 is swingably supported at one end of the 40th hood 138, and a shaft 154 is supported at the tip of the 40th hood 154.
A second tension pulley 158 is pivotally supported via 56. In this case, the 10th section 136 and the 20th section 1
A disc-shaped cam plate 160 is interposed at the other end of each of the cam plates 38 so as to be in contact with each other, and an eccentric shaft 162 of the cam plate 160 supports a first gear 164 (see FIG. 2). The first gear 164 meshes with the second gear 166, and the second gear 164 meshes with the second gear 166.
A shaft 168 of the gear 166 is directly connected to a rotational drive shaft of a motor 170.

Next, the document mount positioning member fixed to the upper part of the sliding body 134 will be described in detail with reference to FIG. 4.

A U-shaped support 180 is erected on the upper surface of the sliding body 134, and a rotating shaft 182 is bridged in the internal space of this support 180. A second cam plate 184 is pivotally supported approximately in the middle of the rotating shaft 182, and a third gear 186 is pivotally supported at one end of the rotating shaft 182. 3rd gear 186
A fourth gear 188 is further meshed with the fourth gear 1.
88 is directly connected to the rotational drive shaft of the second motor 190. Four pillars 191a to 19 are placed upward from the sliding body 134.
1d are erected, and plate bodies 192 are displaceably mounted on these supports 191a to 191d. A pair of magnets 194a and 194b are fixed to the upper surface of the plate 192, and a U-shaped support 196 directed downward is also fixed. This U-shaped support base 196 has a hole 19
8a and 198b, and a hole is also formed in the center of the hole.A cylindrical member 200 is fitted into the hole through the plate 192, and a disk 202 is inserted into one end of the hole.
Attach. A small-diameter protrusion 204 is formed at the other end of the cylindrical member 200, and a coil spring 206 is wound around and engaged with the protrusion 204. coil spring 20
6 is locked to a boss 208 that engages with the support base 196.

Therefore, the cylindrical member 200 is connected to the coil spring 206.
The disc 202 at its tip is always pressed against the peripheral wall of the cam plate 184 under the elastic force of the cam plate 184 . In this case, reference numeral 20
8a and 208b indicate pin members protruding from the holes 198a and 198b, respectively.

There, the slide 134 is engaged with the wire 210.

The wire 210 engages with the rotating shaft 30 via the tension pulley 152, and also engages with the other end of the sliding body 134 via pulleys 212 and 214. on the other hand,
A wire 216 is engaged with the support 180, and the other end of the wire 216 is wound around a pulley 218. A wire 222 is suspended between the pulley 218 and the pulley 220, and the tension pulley 158 faces the wire 222. This pulley 220 is the motor 2
Rotationally driven by 21.

In this case, the document mount 300 (to be described later) is
It is further preferred if a mechanism is incorporated for fast forwarding to a to 26e and then positioning it accurately. Therefore, in the present invention, the document mount 300 is fast-forwarded.
A stopper mechanism 240 for stopping the document sheet 300 near the light beam scanning start position, and a width shifting mechanism 250 for shifting and positioning the document base 300 are provided.

The stopper mechanism 240 may be of any structure as long as it is located in any gap between the belts 26a to 26d and can be freely displaced above these belts, but it preferably includes a solenoid 242 and a solenoid. 2
A pin member 244 is employed which protrudes under the biasing action of 42 and prevents the original mount from being conveyed more than necessary.

The width adjustment mechanism 250 is shown in FIG. This width adjusting mechanism 25
0 is substantially provided on the outside of the housing 110 on the side of the belt 26a in FIG.
It enters above 26e.

That is, the width adjustment mechanism 250 has a motor 252, and a gear 256 is pivotally supported on a rotational drive shaft 254 of the motor 252. The gear 256 meshes with a gear 260 that is supported by a rotating shaft 258. The shaft 258 is the bearing member 2
It is rotatably held by 62a and 262b, and cam plates 264a and 264b are engaged near both ends thereof. Therefore, pin members 266a and 266b engage with the cam plates 264a and 264b, respectively. In fact, since the pin member 266b has the same configuration as the pin member 266a, this pin member 266a will be described.

As can be easily understood from the figure, the cylindrical holding member 26
A cylinder 268 is housed inside the cam plate 7, and this cylinder 268 is constantly pressed against the cam plate 2 by a coil spring 270.
64a side. On the other hand, the cylinder 268
A pin 272, a sliding member 274, and a coil spring 276 are disposed inside the pin 272, and the pin 272 is configured to be able to be pushed in the projecting direction by the coil spring 276.

Next, the image original scanning carrier of the present invention used in relation to the above-mentioned apparatus, that is, the original mount 300, will be explained.

As shown in FIG. 7, the original mount 300 is made of a relatively hard and thick synthetic resin plate, and the original mount 300 is attached to a mount main body 302 and a back surface side of the mount main body 302, and is fixed approximately at the center thereof. A magnetizable plate body 304 is included. Preferably, the plate body is made of a metal member, and has holes 306a, 306b into which the pin members 208a, 208b are fitted, approximately in the center of the plate body in the longitudinal direction. A plurality of holes 308 are formed at regular intervals along the longitudinal end of the mount body 302.

The image scanning reading/recording device and the image original scanning carrier according to the present invention are basically constructed as described above, and the operation thereof will be explained next.

First, the original mount 300 with the image original 400 pasted thereon is placed on the mounting table 18, and the digitizer 22 moves the original such as a color photograph pasted onto the surface of the mount main body 302 constituting the original mount 300. and a cursor (not shown) to set the image reading range of the document. In this case, the digitizer 2
2 specifies the relative positional relationship between the hole portion 308 and the portion to which the image original 400 is pasted. Next, the conveyance belt 20 is driven, and the original mount 300 on the mounting table 18 is conveyed in the direction of arrow A, and faces the conveyance system 24 . In the conveyance system 24, the stamping motor (not shown) is driven to rotate the boot IJ 36 via the belt 38, so that the document base 300 is rotated by the rotation shaft 30 (belt) 2.
6a to 26d, they are transported in the direction of arrow A.

In this case, as determined by the digitizer 22, as shown in FIG. Then, the solenoid 242 is energized to cause the pin member 244 to protrude from between the healds 26a to 26d to receive the leading end of the document mount 300. Next, the width adjustment mechanism 250 is energized. That is, rotation of motor 252 rotates gears 256, 260, which causes cam plates 264a, 264b to engage pins 272, 272.
is projected under the elastic force of the coil spring 276. The protrusion of these pins 272 and 272 causes the original mount 300 to move into the housing 1.
10 (see FIG. 2). Once positioned in this manner, in other words, after passing through the third hole, precision feeding is performed. That is, the light-emitting section 39 and the light-receiving section 40, which are the light detection means 41, detect the arrival of the document base 300 at a predetermined position and send the signal to the control section 14, and the control section 14 outputs the output section 1.
A drive signal is sent to 6. In other words, the manuscript mount 300
The first hole 308 as a start mark provided in
It is the light emitting part 39 that passes through the third hole from
When detected by the light receiving unit 40, the belts 26a to 26e are precisely fed by the positioning mechanism 28,
The detecting means 41 sends a signal indicating that the original attached to the original mount 300 has reached the image reading position to the control unit 14, thereby driving the output unit 16 as described above. The drive of the output section 16 substantially transports the film F from the supply magazine 66 to the receive magazine 100 side. That is, the film F supplied from the magazine 66 is transferred to the roller 68, the roller pair 70, and the guide roller 7.
2) via guide rollers 76, 78 to rotating drum 82; During this time, the loop detector 74 is connected to a light emitter 75a that emits a light beam in a wavelength range to which the film F is not sensitive, and a light receiver 2H.
75b, and detects that a predetermined amount of loops are formed by the film F. On the other hand, the meandering amount detector 80 includes a light emitter and a light receiver that emit a light beam in a wavelength range that does not expose the film F at a position outside the meandering tolerance range on both sides of the film F during transport. The device controls the feeding operation of the film F by issuing a meandering signal when the film F meanderes beyond a permissible amount.

Next, the output section 16 drives the motor 84. That is,
The solenoid 92 (9
The drive circuit 4) is energized to press the nip rollers 88, 90 against the rotating drum 82. That is, when the solenoid 92 (94) is driven as described above, the nip rollers 8B and 90 are brought into pressure contact with the rotating drum 82. As a result, the film F is transferred between the rotating drum 82 and the nip roller 88.
．． 90.

In such a state, the laser light emitted from the laser light source 52 passes through the optical modulator 54 and then swings under the action of the galvanometer mirror 56 to reach the scanning lens 58.
It passes through and reaches the half mirror 60. The light beam reflected and deflected by this half mirror 60 is
00 is scanned onto a document (not shown). After the reflected light from the original enters the light guide 62, it is converted into an electrical signal by the photomultiplier 64, and this signal is supplied to the control unit 14 where gradation correction etc. are performed according to the plate-making situation. .

Based on the gradation correction by the control section 14, the output section 16 records an image on the film F. That is, the drive motor 84 rotates the image recording rotary drum 82 in the direction of arrow C at a predetermined speed, while the nip rollers 88 and 90
Laser light is emitted from the gap defined by the film F.
scanned up. After the laser beam scan continues in this manner, the end of the first image recording is detected, for example, by the light detection means 41 reading the final hole 308 drilled in the document base 300. . Here, the document mount positioning mechanism 28 is driven in the reverse direction, and as a result, the document mount 30
0 is transported in the direction opposite to the arrow entry direction and returns to the original position.

In this way, when the first reading and image recording are completed, the laser light source 52 is driven again and the second image scanning is started. That is, the motor 84 is driven to rotate in the direction of arrow C, and the next film F is fed under the action of the rotation of the nip rollers 88 and 900 to perform image recording.

The film F on which images have been recorded in this way is cut by the cutter 9.
6a and cutter 96b move toward each other to cut the film F, and the film F is stored into the receive magazine 100 via guide members 98a and 98b. In the receive magazine 100, the two films F formed in duotone in this manner are taken out as necessary and subjected to photolithography.

Therefore, the operation of the document mount positioning mechanism 28 incorporated in the conveyance system 24, which performs the above-described operation, will be explained.

When the original mount 300 is fed from the mounting table 18 side to the transport system 24 side, the original mount 300 reaches the upper surface of the belts 26a to 26d as described above. That is, when the mount main body 302 is conveyed to a predetermined position by the belts 26a to 26d, the solenoid 242 is energized to cause the pin member 244 to protrude from between the bells 26a to 26d to receive the leading end of the document mount 300. . Next, the width adjustment mechanism 250 is energized. That is, the rotation of the motor 252 rotates the gears 256 and 260, thereby causing the cam plates 264a and 264b to project the pins 272 and 272 under the elastic force of the coil spring. This pin 272.2
The protrusion 72 brings the document base 300 closer to the rising wall 110a of the housing 110 (see FIG. 2). In this manner, when the mount main body 302 is sufficiently placed on the belts 26 a to 26 d, the motor (not shown) is deenergized and the rotation of the belt 38 and the IJ 36 is temporarily stopped.

At this time, the sliding body 134 is in the position shown in FIG.

That is, the cam plate 160 positions the 10th rod 136 and the 20th rod 138 as shown in the figure, and therefore the 30th rod 148 connects the tension pulley 152 to the wire 2.
It is in a state of being pressed against 10.

On the other hand, the 40th rod 154 is in a bent state so that the tensioning boo U158 is separated from the wire 222.

Therefore, when the mount main body 302 reaches the reading start position as described above, the second seventh rotor 190 is rotationally driven, and therefore,
Rotating shaft 182 via fourth gear 188 and third gear 186
is rotated, and the longer diameter portion of the second cam plate 184 rises. As a result, the disk 202 rises, and the plate body 192 integrated therewith also rises along the support columns 191a to 191d. As a result, pin members 208a, 208b
At the same time, the magnets 194a and 194b also rise, and the tips of the pin members 208a and 208b touch the document mount 300.
At the same time, the magnets 1.94a and 194b come to attract the body 304. In such a state, the solenoid 242 is deenergized to disengage the pin member 244 and the motor 252
The pin members 266a and 266b are also removed under the action of the pin members 266a and 266b.

Next, a rotational drive source (not shown) rotates, and therefore, the belt 38 and pulley 36 rotate to rotationally drive the rotating shafts 30 and 32. As a result, the wire 210 is also rotationally driven together with the bells B6a to 26d, and at this time, since the tension pulley 152 is in pressure contact with the wire 210, the rotational driving force of the rotating shaft 30.32 rotates the wire 210. , slider 134 via pulleys 212, 214
is displaced in the direction of arrow A.

That is, the sliding body 134 continues to be conveyed in the direction of arrow A along the guide member 132 without any particular displacement such as meandering. In this way, the displacement action of the bells 26 a to 26 d and the positioning mechanism 28 ensures stable movement of the document holder 300 in the sub-scanning direction, and therefore, as described above, the The image can be scanned with laser light in a good manner.

The tail end of the document mount 300 has bells l-26a to 26.
When reaching the tip portion d, the motor (not shown) is deenergized and stops driving the belt 38, pulley 36, and rotating shafts 30, 32. Note that the document mount 300 is attached to the document holder 4.
This will lead to the second side.

Next, the positioning mechanism 28 returns to the image reading start position again for the next image reading scan.

At this time, the motor for rotating the belt 38 remains deenergized. That is, since this motor (not shown) is equipped with a one-way clutch, the conveying action in the direction of arrow B becomes free.

Therefore, when the motor 170 is rotationally driven, the shaft 168,
Cam plate 160 via second gear 166 and first gear 164
reaches a position opposite to that shown in FIG. That is, the shaft 162 is in a state close to the tenth throat 136, and on the other hand, the shaft 162 is in a state farthest away from the twentieth throat 138. As a result, the tenth throat 136 moves in the direction of arrow B under the force of the first coil spring 1440, and the third throat 148 separates the tension pulley 1J152 from the wire 210 via the notches 116a and 116b. On the other hand, the 20th rod 138 is displaced against the elastic force of the second coil spring 146, and as a result, the 40th rod 154 is displaced in the direction of descending the notch 118. As a result,
The tension pulley 158 applies a predetermined tension to the wire 222 suspended from the pulleys 218 and 220 (see FIG. 5).

Therefore, the motor directly connected to the pulley 220 is driven to rotate in the direction of the arrow. As a result, the wire 220 displaces the sliding body 134 in the direction of arrow B.

When the sliding body 134 reaches the position shown in FIG. 3, the motor directly connected to the pulley 220 is deenergized. At the same time motor 1
70 is energized again and the shaft 162 moves the cam temporary 160 to the 20th position.
It rotates to a position close to the sword 138. As a result, the 20th hood 138 is displaced in the direction of arrow A, and eventually the tension boob IJ158 is separated from the wire 222 suspended on the pulleys 218 and 220, while the 10th hood 1
36 is displaced in the direction of arrow A against the elastic force of the first coil spring 144, the tension pulley 1
52 is pressed against the wire 210 under the stretching action of the 30th strand 148. Then, main scanning of the image on the document mount is started again.

Note that when the image reading scan is completed as described above, the positioning mechanism 28 is on the rotating shaft 30 side. Therefore, in this position, the motor 190 rotates to rotate the second cam plate 184 and lower the plate body 192.

As a result, the pin members 208a and 208b are attached to the document base 30.
0 from the holes 306a and 306b. As a result,
The original mount 300 is in a state of being attracted to the magnets 194a and 194b, and the magnet 194a.

Since the bell 194b has a predetermined gap with the plate 192, when the bells 26a to 26d are rotated in the direction of arrow A, they are easily separated from the suction force and transported to the document holder 42 side. It becomes possible to

According to the embodiment described above, the original image reading start position and the reading end position of the positioning mechanism 28 are located on the original mount 300.
This is done by a hole 308 drilled in the hole 308 . However, it goes without saying that this positioning can also be performed, for example, by detecting the position of the sliding body 134, without using the original mount 300. In this case, for example,
As shown by the broken line in FIG. 2, a limit switch 500a is provided at a position corresponding to the image reading start position, and a limit switch 500a is provided at a position corresponding to the image reading end position.
b.

According to the present invention, as described above, image information is obtained by scanning a light beam over a document image, and when image recording is performed based on this image information to create a mesh film, the image recording start position is always kept constant. It is configured as follows. Therefore, the effect that image reading is always performed stably and positioning is accurate can be obtained. Furthermore, since it is possible to precisely feed the document mount after fast forwarding, there is an advantage that the image recording cycle can be increased. Moreover, according to the present invention, since the conveyance and positioning mechanism is pulled by a wire, there is no unevenness in conveyance speed unlike in ordinary belt conveyance, and therefore images can be read accurately. Furthermore, the presence of the guide member and the action of the pin members that engage with the document mount can easily prevent the mount from meandering.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments.
For example, it is possible to selectively employ the pin member and the magnet that engage with the original mount, and it is of course possible to make various improvements and changes in design without departing from the gist of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view of the image scanning reading/recording device according to the present invention, FIG. 2 is a schematic plan view of the positioning mechanism according to the present invention, and FIG. 3 is a positioning mechanism according to the present invention shown in FIG. FIG. 4 is a partially cutaway perspective view showing the main parts of the positioning mechanism according to the present invention; FIG. 5 is a schematic view showing the state of applying tension to the conveyance system of the positioning mechanism according to the present invention. FIG. 6 is a perspective explanatory view of a width adjusting mechanism disposed in connection with the positioning mechanism according to the present invention, and FIG. 7 is a perspective explanatory view of a document mount according to the present invention.

Claims (15)

[Claims] (1) While conveying an image original scanning carrier in the sub-scanning direction, a first light beam is scanned on the image original on the carrier in the main scanning direction to read the image information of the image original; An image scanning reading/recording apparatus that performs image recording by processing the image signal, modulating the second light beam for image recording, and irradiating the photosensitive material as a mesh signal, the image recording apparatus comprising: An image document positioning mechanism is provided in a conveyance system that conveys the image document in the sub-scanning direction, which engages the carrier to specify the image document scan start position and conveys the carrier to the image document scan end position in synchronization with the driving of the conveyance system. An image scanning reading/recording device, characterized in that the image scanning reading/recording device is configured to be arranged. (2) In the apparatus according to claim 1, the image original positioning mechanism includes a pin member and/or a magnet that engages with the image original scanning carrier, and a sliding member that supports the pin member and/or magnet. and a conveyance mechanism that conveys the sliding member in the sub-scanning direction. (3) In the apparatus according to claim 2, the pin member and/or the magnet are engaged with the sliding member and are supported to displace the pin member and/or magnet toward the image original scanning carrier. An image scanning reading/recording device in which means disposed on a member and displacing the support member includes a cam plate and a rotational drive source for rotating the cam plate. (4) In the apparatus according to any one of claims 1 to 3, the image document positioning mechanism includes a wire that engages with a rotating shaft on which a belt constituting the conveyance system is suspended, and An image scanning reading/recording device that conveys an image document scanning carrier in the sub-scanning direction in synchronization with a belt under the rotation of a shaft. (5) In the apparatus according to any one of claims 1 to 4, the image original positioning mechanism transports the image original scanning carrier in a direction opposite to the sub-scanning direction to at least the image original scanning start position. An image scanning reading/recording device having an original position return means. (6) An image scanning reading/recording apparatus according to claim 5, wherein the original position return means comprises a wire that engages with a sliding member and a rotational drive source that winds the wire. (7) In the device according to any one of claims 4 to 6, a tension pulley is selectively engaged with the wire, thereby substantially moving the sliding member in the sub-scanning direction or An image scanning reading/recording device that can be displaced in the opposite direction. (8) An image scanning, reading and recording device according to any one of claims 1 to 7, wherein the image document positioning mechanism includes a guide member extending in the sub-scanning direction. (9) An image scanning reading/recording device according to any one of claims 1 to 8, which is provided with a stopper mechanism that stops the carrier being rapidly fed into the transport system at a predetermined position. (10) An image scanning reading/recording device according to any one of claims 1 to 9, wherein the conveyance system is provided with a width shifting mechanism for positioning the carrier by shifting its width. (11) In the device according to claim 10,
The width adjustment mechanism includes a cam plate that rotates under the action of a rotational drive source,
An image scanning reading/recording device consisting of a pin member that protrudes from the cam plate. (12) A flat carrier body on which an image document is mounted; an engaging means disposed on the carrier body to engage with an image document positioning mechanism and to be conveyed in the sub-scanning direction; 1. A carrier for scanning an image original, comprising a position display means for specifying the position of the image original on the main body. (13) In the carrier according to claim 12,
A carrier for scanning an image original, in which the engaging means is formed of a plate having a hole formed in a substantially central portion of the carrier body to engage the tip of a pin member constituting an image original positioning mechanism. (14) In the carrier according to claim 13,
The engaging means is an image original scanning carrier including a metal member attracted by a magnet constituting an image original positioning mechanism. (15) A carrier for scanning an image original according to claims 12 to 14, wherein the position display means is formed in the carrier body and includes a plurality of holes that are detected by photoelectric detection means.