JP2004271730A - Image recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image recording apparatus of which a squeeze roller is improved in durability and which can obtain an image of high quality. <P>SOLUTION: The image recording apparatus sucks a recording material onto an exposure table 201, placing a document on the recording material and covering them with a cover sheet 275, squeezes the cover sheet 275 with a squeeze roller 276 while sucking air from the circumference of the exposure table 201 to bring the recording material and document into contact with each other, and writes an image by exposure. The squeeze roller 276 comprises a support shaft 276a and a roller part 276b of sponge inserted into the support shaft 276a, and the roller part 276b has a circumferential part 276b1 and coatings 276c1 and 276c2 at both end parts 276b2 of the circumferential part 276b1. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image recording device for writing an image on a recording material.
[0002]
[Prior art]
For example, there is a color plate inspection machine as an image recording device, and as such a color plate inspection device, various proof making devices and the like are commercially available, and a color proof is made by using this device. You can easily and quickly determine whether the film is laid out correctly and is ready to produce the required color before making a formal printing plate, and make corrections as soon as errors are discovered. I can do it.
[0003]
This involves using a roll of color paper as the recording material, sending the required length, cutting the sheet into a sheet, transporting it to a predetermined position on the exposure table, adsorbing and fixing it on the exposure table, and positioning it separately provided The document positioned by the device is united and brought into close contact with the color paper on the exposure table, and the exposure light from the exposure section using a fluorescent light as the light source is scanned over it to perform contact exposure, and then developed. Thus, a color proof is finished (for example, Patent Document 1).
[0004]
In recent years, with the spread of Desk Top Publishing, image editing and page imposition of images input from a scanner on a CPU have become common, and full digital editing has become commonplace. In such a process, there is a method in which a recording material is sucked on the outer peripheral surface of a rotating drum, the recording material is brought into close contact with a squeeze roller, and an image is written by an image writing unit (for example, Patent Document 2).
[0005]
[Patent Document 1]
JP-A-8-278562 (pages 1 to 12, FIGS. 1 to 3)
[0006]
[Patent Document 2]
JP-A-2000-347304 (pages 1 to 30, FIG. 5)
[0007]
[Problems to be solved by the invention]
As described above, the recording material is brought into close contact with the squeeze roller by suction force, and durability is required. However, since both ends of the roller portion of the conventional squeeze roller remain cut, the squeeze roller And aging due to the pressure of the suction force and the durability was poor.
[0008]
An object of the present invention is to provide an image recording apparatus which eliminates such disadvantages, improves the durability of a squeeze roller, and can obtain a high-quality image.
[0009]
[Problems to be solved by the invention]
In order to solve the above problems and achieve the object, the present invention is configured as follows.
[0010]
The invention according to claim 1 suctions a recording material on an exposure table, places an original on the recording material, further covers them with a cover sheet, and sucks air from around the exposure table, An image recording apparatus that writes the image by exposing the recording material and the original by closely contacting the recording material by squeezing the cover sheet with a squeeze roller,
The squeeze roller comprises a support shaft and a sponge roller portion inserted into the support shaft,
The image recording apparatus is characterized in that the roller portion has a coating on a circumferential portion and on both end portions of the circumferential portion.
[0011]
According to the first aspect of the present invention, the squeeze roller has a sponge roller portion, and the roller portion has a coating on a circumferential portion and both end portions of the circumferential portion. It is possible to prevent the roller from squeezing and deterioration due to pressure due to the suction force, thereby improving the durability of the squeeze roller and obtaining a high-quality image.
[0012]
The invention according to claim 2 is an image recording apparatus which sucks a recording material onto an outer peripheral surface of a rotating drum, makes the recording material adhere to the surface by squeezing with a squeeze roller, and writes an image.
The squeeze roller includes a support shaft and a sponge roller portion inserted into a shaft hole of the support shaft,
The image recording apparatus is characterized in that the roller portion has a coating on a circumferential portion and on both end portions of the circumferential portion.
[0013]
According to the second aspect of the present invention, the squeeze roller has a sponge roller portion, and the roller portion has a coating on a circumferential portion and both end portions of the circumferential portion. It is possible to prevent the roller from squeezing and deterioration due to pressure due to the suction force, thereby improving the durability of the squeeze roller and obtaining a high-quality image.
[0014]
In the invention according to claim 3, the roller portion cuts a sponge roller material having a long shaft hole into a predetermined length, and closes the shaft hole of the sponge roller material having the predetermined length to form the circumferential portion. 3. The image recording apparatus according to claim 1, wherein a coating is applied to both ends of the circumferential portion.
[0015]
According to the third aspect of the present invention, the roller section cuts the sponge roller material into a predetermined length, closes a shaft hole of the sponge roller material having the predetermined length, and forms a circumferential portion and a circumferential portion of the sponge roller material. By applying a coating to both end portions, a durable roller portion can be easily formed.
[0016]
The invention according to claim 4, wherein the roller portion is formed by aligning a plurality of divided roller portions in an axial direction, and a circumferential portion of the plurality of divided roller portions and a circle of the divided roller portions located on the both sides. The image recording apparatus according to any one of claims 1 to 3, wherein a coating is applied to at least an outer end side portion of the peripheral portion.
[0017]
According to the fourth aspect of the invention, even if the roller portion is formed by aligning a plurality of divided roller portions in the axial direction, it is possible to prevent aging by the squeeze roller and deterioration over time due to the pressure of the suction force. The durability of the roller is improved, and a high quality image can be obtained.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a description will be given of a color proof creating apparatus in which the form of the image recording apparatus of the present invention is incorporated, but the present invention is not limited to this embodiment. 1 is a front view of the color proof creating device, FIG. 2 is a side view of the color proof creating device, FIG. 3 is a side view of the squeeze roller, FIG. 4 is a sectional view of the squeeze roller, and FIG. FIG.
[0019]
The color proof creation device creates a production printing plate using each separation original document film of the document separated into yellow (Y), magenta (M), cyan (C) and black (BK) plates. Inspection of the original film layout for errors, colors, characters, etc. before printing, and obtaining a proof (color proof) for checking the finish of the printed matter in advance With a device, one or more separation net original films are positioned, superimposed on the color photosensitive material of the recording material, and successively exposed in close contact with colorimetric light corresponding to the original film, and a proof using the color photosensitive material (color proof) ), An error in the separation net document is found, the print finish is checked in advance, and the work of restoring the separation net document can be performed.
[0020]
The apparatus main body 100 has a document table 140 on which a document positioning pin bar (registration pin) 143 is installed above the main body frame 101 supported by the legs 102, and a dark room is formed as a first chamber above the document table 140. An enabled light shielding cover 120 is provided so as to be openable and closable by a hinge 121 and a gas damper 122.
[0021]
An exposure section 300 for scanning and exposing the contact exposure surface of the document table is provided in the first chamber. A tubular light source lamp 302 is provided at the center of the exposure unit 300, and a polygonal cylinder 301 is provided on the outside of the exposure unit 300 on each cylinder surface such as blue (B), green (G), red (R), gray (ND), etc. The filter is provided so as to be rotatable.
[0022]
The exposure unit 300 can run on rails 317A and 317B for scanning. The reciprocating drive is performed by connecting the housing of the exposure unit 300 to the roller chain 324 wound around the chain sprockets 321 and 322 with pins.
[0023]
Squeezing means having a squeezing roller 276 is incorporated in the exposure unit 300, and the structure and function thereof will be described later in detail.
[0024]
A mounting section 200 is provided inside the main body frame 101 as a second chamber. The exposure table 201 is driven by a motor (not shown) to be movable up and down.
[0025]
On the other hand, the light-blocking curtain 240 is mounted on the rods 249 which are held at both ends by the link attachment 247 of the roller chain 246 running symmetrically on both sides and are provided at equal intervals. Are fixedly connected to the leading and trailing rods of the rod 249, respectively.
[0026]
The opening 144 is closed while the light shielding curtain 240 is held by many rods 249. A roller (chain) 246 driven by a motor (not shown) reciprocates around sprockets 241, 242A, 243, and 244 to open a window (opening) 144 when the exposure table 201 is fitted into the document table 140. It can be closed and closed. Such a light-blocking curtain 240 is provided so as to be able to switch between formation and release of light tightness of the second chamber, in which the exposure table 201 is stored, with respect to the first chamber by traveling in the boundary area between the first chamber and the second chamber. Have been.
[0027]
The long roll 402 of the silver halide color photosensitive material is loaded in the magazine 401 to form the photosensitive material loading section 400, and the leading end of the long roll of photosensitive material is fed out by the sandwiching roller 511, and the leading end is the cutter section 510. Wait to be aligned.
[0028]
The front end of the photosensitive material at the cutter position is further fed to the left end of the suction cup 527 by the sandwiching roller 511, and the front end is sucked by the suction cup 523, and the traveling head 522 having the suction cup travels the rollers 525 and 526 on both sides. Guided by the rail 521, the photosensitive material moves to a position where the predetermined length of the photosensitive material is measured, stops, is cut by the cutter unit 510, and further moves so that the tip of the photosensitive material is positioned at a predetermined position of the mounting table 201. Then, the cutter unit 510 is returned to the origin position. Then, after the suction of the suction cup of the traveling head 522 has been completed, the traveling head 522 also returns to the original position.
[0029]
Here, solenoids 535 are attached to both sides of the traveling head 522 via brackets 534, a frame 531 is fixed to the movable iron core 536, and a suction head 523 connected to a hose 524 is attached to the traveling head 522 and the frame 531. The holding pipe 537 of the suction disk 523 is provided to penetrate through a guide hole formed in the traveling head 522 and the frame 531, the thrust direction is fixed to the frame 531, and the traveling head 522 can slide along the hole. And floats above the exposure table surface via a helical spring 532 inserted between the traveling head 522 and the frame 531.
[0030]
When the photosensitive material is conveyed and placed on the exposure table 201 in this manner, a suction pressure is applied to the suction holes formed on the exposure table 201 by driving the blower 204A via the flexible hose 205, and Is tightly fixed on the exposure table 201.
[0031]
When the light-shielding cover 120 is closed with the transparent cover sheet 275 being set, the cover sheet 275 has both ends slightly lower than the platen surface, so that the original on which the original screen film and the photosensitive material are placed is inevitably placed. The cover sheet 275 is pressed against the table and the exposure table surface.
[0032]
Then, in this state, the squeeze roller 276 squeezes and air between the cover sheet 275 and the document table is evacuated by a depressurizing blower or a vacuum pump.
[0033]
The squeeze roller 276 is provided in the exposure unit 300. When the light-shielding cover 120 is covered, the exposing unit 300 moves forward in the forward squeeze squeeze (does not perform squeezing and does not perform exposure in the forward movement), and starts squeezing when returning. In the forward movement of the next reciprocating operation, a forward feed empty squeeze operation is performed, and in the backward movement, the squeeze roller 276 is pressed against the transparent cover sheet 275 by its own weight to squeeze and complete the scanning exposure.
[0034]
Also, the squeeze roller 276 is dropped on the surface of the stacked sheets and brought into pressure contact with its own weight to start squeezing.
[0035]
As shown in FIGS. 3 and 4, the squeeze roller 276 includes a support shaft 276a and a sponge roller portion 276b made of a sponge such as urethane rubber inserted into the support shaft 276a. The roller portion 276b has coatings 276c1 and 276c2 made of synthetic rubber on a circumferential portion 276b1 and both end portions 276b2 of the circumferential portion 276b1. It is preferable that the film thickness of the coatings 276c1 and 276c2 is 2 μm to 20 μm.
[0036]
As shown in FIG. 5, the roller portion 276b cuts the sponge roller material A into a predetermined length (FIG. 5 (a)), and suspends the sponge roller material A in the shaft hole A1 of the sponge roller material A having the predetermined length. Is inserted and closed (FIG. 5 (b)), immersed in a coating tank D to coat the circumference and both ends of the circumference (FIG. 5 (c)). Put and dry (FIG. 5 (d)).
[0037]
There are various coating methods, and as shown in FIG. 5 (e), the shaft hole A1 of the sponge roller material A is closed with a stopper F, and a wire G is hooked on one end, and immersed in the coating tank D. The roller portion 276b may cut the sponge roller material A into a predetermined length, close the shaft hole A1 of the sponge roller material A having the predetermined length, and form a circumferential portion 276b1 and a circumferential portion 276b1. By applying coating to both end portions 276b2, the roller portion 276b having durability can be easily formed.
[0038]
As described above, the squeeze roller 276 has the sponge roller portion 276b, and the roller portion 276b has the coating 276c1 and 276c2 applied to the circumferential portion 276b1 and both end portions 276b2 of the circumferential portion 276b1. Ironing by the squeeze roller 276 can be prevented by the coating 276c1 of the circumferential portion 276b1, and suction pressure at the time of suction can be prevented by the coatings 276c1 and 276c2, so that the durability of the squeeze roller 276 improves and a high-quality image can be obtained. .
[0039]
In addition, by performing grounding using a conductive sponge on the squeeze roller 276, a neutralizing effect on the original film is generated, the sticking of the film can be prevented, and the effect of preventing dust from adhering to the film and improving the positional accuracy can be obtained. .
[0040]
Further, a nozzle is provided on the front side in the running direction of the squeeze roller 276, and ion air is sprayed on the cover sheet or the original film, thereby preventing dust from adhering to the film, preventing dust from being blown, and exerting a squeeze effect by air. . Then, the positional accuracy of the original film is improved, and the durability of the squeeze roller 276 is also improved.
[0041]
In order to perform squeezing, suction, and exposure in this state, first, the exposing unit 300 travels on the guide rails 317A and 317B to perform an empty squeeze at the time of forward movement and a first reciprocating motion (a main squeeze) at the time of backward movement. The reciprocation is preferably performed one to three times before scanning exposure), and then suction is started at the time of the next reciprocation of the second reciprocation, and at the time of reciprocation at the time of the reciprocation. Squeezing and scanning exposure are performed while continuing suction, and the first color exposure by the filter is completed.
[0042]
Thus, one scanning exposure can be completed by two reciprocations or three to reciprocations of the exposure unit 300. Next, in order to perform the second image exposure using a filter of another color, the exposure table 201 is lowered to slightly below the traveling path of the light shielding curtain, and air is blown by a nozzle here, or the blower 206 is switched to a blowing side, By blowing air from 207 and closing the light shielding curtain, the original and the photosensitive material can be easily and completely separated. The order of blowing the blower and lowering the exposure table 201 may be reversed or simultaneous. When the light-shielding cover 120 is opened, the first room is in a bright room state, but the second room is light-tight with respect to the first room and a dark room is formed.
[0043]
At the same time, the transparent cover sheet 275, one end of which is stopped by the light-shielding cover 120, opens the light-shielding cover and is lifted obliquely upward, so that the next original film can be easily loaded.
[0044]
In this state, the second original (black plate and one of Y, M, and C, for example, M plate, or one of Y, M, C, and black plates, or a plurality thereof) is registered with a registration pin. After setting the light-shielding cover and opening the light-shielding curtain and raising the exposure table 201 to the document table surface, the transparent cover sheet is automatically re-covered, and the squeeze roller 276 attached to the exposure unit 300 is moved together with the exposure unit. In the reciprocating movement, the forward movement is an empty squeeze with the roller raised, but in the backward movement, suction is applied while squeezing, and the sheets are brought into close contact with each other, and the polygonal cylinder 301 is turned to form a cylinder surface provided in another filter. Are opposed to each other to perform scanning contact exposure by moving the exposure unit by the second color filter, and the second exposure is completed.
[0045]
Similarly, a third original (black plate and one of Y, M, and C, for example, C plate, or one of Y, M, C, and black plates, or a plurality of these plates) and a corresponding filter Is performed in the same procedure, and the third exposure is completed. In this way, if necessary, one to several exposures are repeated.
[0046]
Finally, the exposure table 201 is lowered to the lowermost position, the suction state of the photosensitive material is released by releasing the suction, and the leading end of the photosensitive material is fed to the holding roller 552 by the traveling of the suction plate 523.
[0047]
When the suction in the close contact state is released, the state where the negative pressure remains remains only by stopping the suction blower 204A, so that the suction plate 523 cannot quickly feed the holding roller 552.
[0048]
The photosensitive material whose leading end has reached the holding roller 552 is sent to the left development processing section 600. When an internal latent image type direct positive photosensitive material is used, fogging exposure is performed by the second exposure unit 350 during transportation in the color developing tank 601. Then, the photosensitive material passes through a bleach-fixing tank and a stabilizing tank, is dried while being conveyed by a drying unit 680, and is collected at the left end of the apparatus.
[0049]
The photosensitive material requires the second exposure when using the internal latent image type direct positive photosensitive material, but does not require the second exposure when using the negative color photosensitive material and the chemical fog type direct positive photosensitive material. I do. When other photosensitive materials such as dye-bleached color photosensitive materials, color reversal, and diffusion transfer are used, exposure and development can be performed by a similar system by providing a processing bath suitable for each of them. .
[0050]
Of course, for the exposure of the direct-positive photosensitive material, a black plate is superimposed on each of the Y, M, and C plates, and the Y plate and the black plate are B, and the M plate and the black plate are G. , C and black plates are exposed three times with R filters corresponding to each other, or are exposed using filters corresponding to Y, M, C and black plates, respectively. For exposure of the photosensitive material, the Y, M, and C originals are individually superimposed on the photosensitive material, and the Y, B, M, and C filters are each provided with a filter of R. The exposure is repeated three times, and the fourth exposure is performed by superimposing a black plate, and exposing corresponding to an ND filter and, if necessary, a color filter for color correction, or performing triple exposure of B, G, and R.
[0051]
Further, if necessary, in addition to the above color separation exposures, light corresponding to a different color separation may be used for further exposure so as to produce a basic color suitable for the printing ink. Further, in order to previously blend light equivalent to different color separations, processing such as blending of BGR-colored light or exposure using a combination of filters may be performed. Similarly, in order to reproduce colors suitable for special inks other than the standard inks of Y, M, C, and black, which are generally called special colors, repeated exposure, blending of colored light, or combination of filters may be performed. In this case, depending on the case, it is necessary to use a decomposed netting film called a special color plate, or to combine another film with a special color decomposed netting film. It is necessary to perform close baking.
[0052]
Although the above embodiment has been described with reference to a contact type exposure apparatus, the present invention is naturally applicable not only to a contact type exposure apparatus but also to a projection type exposure apparatus.
[0053]
That is, only the photosensitive material is placed and fixed on the exposure table 201, and the original film is fixed on another original table without overlapping the photosensitive material like a contact type, and the original screen is projected with a projection lens. The image is formed on the surface of the photosensitive material on the exposure table 201 through the light source.
[0054]
FIG. 6 is a side view of another embodiment of the squeeze roller. In the squeeze roller 276 of this embodiment, the roller portion 276b is formed by aligning the plurality of divided roller portions 276b21 in the axial direction, and the circumferential portion 276b211 of the plurality of divided roller portions 276b21 and the divided roller portions 276b21 located on both sides are formed. At least the outer end 276b212 of the circumferential portion 276b211 is coated. As described above, even when the roller portion 276b is formed by aligning the plurality of divided roller portions 276b21 in the axial direction, it is possible to prevent the squeeze roller 276 from being deteriorated over time due to squeezing roller 276 and the pressure of the suction force. And a high quality image can be obtained.
[0055]
Next, another embodiment of the image recording apparatus of the present invention will be described. A color proof creating apparatus to which the image recording apparatus of this embodiment is applied is configured as shown in FIGS. 7 is a schematic configuration diagram of a color proof creating device, FIG. 8 is a front view illustrating a schematic configuration of an exposure device, and FIG. 9 is a plan view illustrating a schematic configuration of the exposure device.
[0056]
The apparatus main body 2 of the color proof creating apparatus 1 includes an exposure unit 3 and a development processing unit 4. On the upper part of the exposure unit 3, a setting unit 7 is arranged on the developing unit side. A recording material light-shielding cover 9 is provided in the set section 7 so as to be openable and closable, and a pair of recording material loading magazines 10 containing a roll-shaped photosensitive material or a recording material such as paper are set by the recording material light-shielding cover 9. It is possible.
[0057]
A paper discharge unit 15 is provided on the side of the development processing unit 4, and the processed photosensitive material is discharged to the paper discharge unit 15.
[0058]
The exposure unit 3 includes a paper feed unit 20, a main scanning unit 30, a sub-scanning unit 40, and an accumulator unit 60. In the paper supply unit 20, a transport roller pair 21, a cutter unit 22, and a rotation roller 23 are arranged corresponding to the recording material loading magazine 10. The recording material is pulled out by a conveying roller pair 21 arranged corresponding to the recording material loading magazine 10, cut into a predetermined length by a cutter unit 22, and sent to a main scanning unit 30 via a rotating roller 23. Has become.
[0059]
The main scanning unit 30 and the sub-scanning unit 40 constitute an exposure unit 500 that records an image on a recording material. The main scanning unit 30 is provided with a drum 31 that forms a cylinder in a rotatable manner. It is attracted to the outer surface and rotates together. The optical unit 32 is arranged to face the drum 31, and the optical unit 32 can be moved by the sub-scanning unit 40 in parallel with the drum axis. The optical unit 32 receives a digital image signal and exposes the recording material adsorbed to the drum 31 with a laser beam to write an image, thereby constituting an image writing unit 800.
[0060]
The accumulator unit 60 temporarily stops the recording material in order to transfer the recording material exposed from the exposure unit 500 to the processor unit 820 provided in the development processing unit 4 for developing the recording material. The accumulator unit 60 peels off the recording material on which writing has been completed from the drum 31 and sends the recording material to the processor unit 820. At this time, if the transport speed of the processor unit 820 is lower than the discharge speed of the exposure unit 500, the recording material is sent to the accumulator unit 60 while the discharge speed is high, and the recording material is accumulated so as to hang down on the accumulator unit 60. And the transfer timing with the processor unit 820 so that the processing capability of the exposure unit 500 is not reduced.
[0061]
The processor unit 820 of the development processing unit 4 includes a second exposure unit 41 (hereinafter, described as an example of a reversal exposure direct positive photosensitive material), a development unit 42, a fixing unit 43, a stabilization unit 44, and a drying unit 45. ing. A portion of the recording material not exposed by the exposure unit 500 by the second exposure unit 41 forms a pseudo image, and the second exposed recording material is transported to the developing unit 42, the fixing unit 43, and the stabilizing unit 44 for development. The processed recording material is dried in the drying unit 45 and sent to the paper discharge unit 15.
[0062]
Next, the configuration of the exposure apparatus will be described in detail.
[0063]
In the setting section 7, the recording material loading magazine 10 is set at a position between the rollers 21a and 21b of the transport roller pair 21 of the sheet feeding section 20 with the leading end of the recording material pulled out by a predetermined length. During conveyance in which the recording material is supplied from one of the recording material loading magazines 10, the roller 21b is moved to the conveyance position and the recording material is pressed between the opposing rollers 21a and 21b. A reference sensor S1, a rotating roller 23, and a guide 26 are provided between each cutter unit 22 and the squeeze roller 25, respectively. The squeeze roller 25 has the same configuration as that of the embodiment shown in FIGS. Further, the squeeze roller 25 a of the present invention may be arranged by pressure bonding at a stage subsequent to the squeeze roller 25. In this case, the squeeze roller 25 is preferably a rubber roller having a hardness of 20 to 80 degrees.
[0064]
The squeeze roller 25 detects the leading end Pa of the recording material P by the reference sensor S1, detects the leading end Pa, rotates by transporting the recording material P, detects the feed amount of the recording material P, and determines a predetermined length. To operate the cutter unit 22 to cut the recording material P. A shutter 27 is disposed at a stage subsequent to the cutter unit 22 to prevent light from entering the conveyance path of the recording material P and prevent dust and the like from entering. A rear end detection sensor S2 for detecting the end portion Pb of the recording material P is disposed in front of the rollers 21a and 21b.
[0065]
The shaft portions 31a and 31b at both ends of the drum 31 of the main scanning unit 30 are rotatably supported by support tables 34a and 34b via bearings 33a and 33b. A drive pulley 35a is provided on one shaft portion 31a of the drum 31. The drive pulley 35a is connected to an output pulley 35b of the drum rotation motor M6 by a belt 36, and drives the drum rotation motor M6 constituting the rotation means 900. As a result, the drum 31 rotates. A rotary encoder 37 is provided on the other shaft portion 31b of the drum 31, and outputs a rotation pulse to be used for pixel clock control synchronized with the rotation of the drum.
[0066]
One shaft 31 a of the drum 31 is connected to a suction blower constituting the air suction means 810. The drum 31 is formed as a hollow body, and a through hole 3lc is formed on the surface. The inside of the drum 31 is depressurized by driving the air suction means 810, and the recording material is adsorbed on the surface of the drum 31.
[0067]
The optical unit 32 has a plurality of light sources such as LDs or LEDs corresponding to the respective wavelengths. For example, an image writing unit 800 that exposes an image on a recording material on the drum 31 is configured.
[0068]
The optical unit 32 can be moved in the drum axis direction by moving means 700. The moving means 700 has guide members 341 and 342 for guiding the movement of the optical unit 32, and a rotatable ball screw 340 for moving the optical unit 32. The ball screw 340 is rotated by the drive motor M7. The drive motor M7 has a motor shaft 343, one end of a ball screw 340 is provided on the motor shaft output side via a coupling 344, and a weight 345 is provided on the motor shaft non-output side of the drive motor M7.
[0069]
The weight 345 is formed in a cylindrical shape, but is not limited to this. The weight 345 may be formed in a triangular cylindrical shape, a rectangular cylindrical shape, or the like, and the rotor inertia moment of the drive motor M7 is artificially increased. The resonance frequency f which affects the vibration can be changed, and the vibration of the ball screw 340 can be suppressed with a simple structure.
[0070]
By driving the drive motor M7, the ball screw 340 rotates forward or backward through the coupling 344, and the optical unit 32 moves parallel to the drum axis.
[0071]
In order to transfer the recording material from the exposure unit 500 to the processor unit 820, the accumulator unit 60 for temporarily stopping the recording material includes a separation guide 61 for separating the recording material sucked by the drum 31, a conveyance guide 62, and a processor unit in the accumulator unit 60. 820 has a discharge roller 64 disposed on the sheet entrance side, and peels off the recording material wound around the drum 31 and sends it to the processor unit 820.
[0072]
【The invention's effect】
As described above, in the invention according to claim 1, the squeeze roller has a sponge roller portion, and the roller portion has a coating on a circumferential portion and both end portions of the circumferential portion. In addition, it is possible to prevent the squeeze roller from being deteriorated with the pressure of the squeeze roller and the suction force, thereby improving the durability of the squeeze roller and obtaining a high quality image.
[0073]
According to the second aspect of the present invention, the squeeze roller has a sponge roller portion, and the roller portion is coated on the circumferential portion and both end portions of the circumferential portion. It is possible to prevent deterioration over time due to the pressure of the squeeze roller and the pressure of the suction force, improve the durability of the squeeze roller, and obtain a high-quality image.
[0074]
According to the third aspect of the present invention, the roller portion cuts the sponge roller material into a predetermined length, closes the shaft hole of the sponge roller material having the predetermined length, and forms a circumferential portion and both end portions of the circumferential portion. By applying a coating to the above, a durable roller portion can be easily formed.
[0075]
According to the invention described in claim 4, even if the roller portion is formed by aligning a plurality of divided roller portions in the axial direction, it is possible to prevent the squeeze roller from being deteriorated over time due to squeezing roller squeezing or the pressure of the suction force, and the durability of the squeeze roller can be reduced. Performance is improved, and a high-quality image is obtained.
[Brief description of the drawings]
FIG. 1 is a front view of a color proof creating device.
FIG. 2 is a side view of the color proof creating device.
FIG. 3 is a side view of the squeeze roller.
FIG. 4 is a sectional view of a squeeze roller.
FIG. 5 is a diagram showing a process of forming a squeeze roller.
FIG. 6 is a side view of another embodiment of the squeeze roller. This
FIG. 7 is a schematic configuration diagram of a color proof creating device.
FIG. 8 is a front view showing a schematic configuration of an exposure apparatus.
FIG. 9 is a plan view illustrating a schematic configuration of an exposure apparatus.
[Explanation of symbols]
201 Exposure table
275 cover sheet
276 squeeze roller
276a Support shaft
276b Roller part
276b1 circumference
276b2 Both ends
276c1, 276c2 Coating

Claims (4)

The recording material is sucked on the exposure table, the original is placed on the recording material, and further covered with a cover sheet.At the same time, air is sucked from around the exposure table, and at the same time, a squeeze roller is used on the cover sheet. In an image recording apparatus that writes the image by exposing the recording material and the original to close contact by squeezing,
The squeeze roller comprises a support shaft and a sponge roller portion inserted into the support shaft,
The image recording apparatus according to claim 1, wherein the roller portion has a coating on a circumferential portion and on both end portions of the circumferential portion. In an image recording apparatus, a recording material is sucked on an outer peripheral surface of a rotating drum, and the recording material is brought into close contact with a squeeze roller, thereby writing an image.
The squeeze roller includes a support shaft and a sponge roller portion inserted into a shaft hole of the support shaft,
The image recording apparatus according to claim 1, wherein the roller portion has a coating on a circumferential portion and on both end portions of the circumferential portion. The roller section cuts a sponge roller material having a long shaft hole into a predetermined length, closes the shaft hole of the sponge roller material having the predetermined length, and surrounds the circumferential portion, and both ends of the circumferential portion. The image recording apparatus according to claim 1, wherein a coating is applied to the part. The roller portion is formed by aligning a plurality of divided roller portions in the axial direction, a circumferential portion of the plurality of divided roller portions, and at least an outer end side portion of the circumferential portion of the divided roller portion located on the both sides. The image recording apparatus according to any one of claims 1 to 3, wherein a coating is applied to the image recording apparatus.

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