JP2009113984A - Sheet material adhering device, post-processing device, image forming device, and sheet material adhering method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material adhering device which can prevent crinkle or oblique curl of a medium and mixing of air bubbles after adherence by eliminating variation of adhering position when a first sheet material and a second sheet material are obliquely conveyed and both sheet materials are crossly adhered at the oblique position, and also to provide an image forming device. <P>SOLUTION: The sheet material adhering device is provided with a torque limiter TR for imparting a torque reverse to the conveying direction of the release paper with respect to a sheet holding roll for deliverably holding the second sheet material adhering to the first sheet material with an adhering means and a laminated released paper in a winding state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sheet material adhering apparatus for adhering sheet materials to each other, a post-processing apparatus, a sheet material adhering method, and an image forming apparatus including such a sheet material adhering apparatus.

Currently, there are various kinds of sheet products formed by adhering sheet materials. For example, a transparent sheet in which an image is formed on one side by an electrophotographic image forming apparatus, and white paper, the image There is an image recording sheet pasted so as to sandwich.
This is an extremely effective technical means for easily obtaining gloss and texture close to photographic image quality using an electrophotographic image forming apparatus. Conventionally, a sticking means for obtaining this image recording sheet. For example, an adhesive such as spray glue is sprayed on the image surface side of the transparent sheet, and the transparent sheet and the white paper are glued (for example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 3-50586

As described above, when the sheet materials are adhered to each other, a problem is that air bubbles enter between the sheet materials. In particular, in the case of the image recording sheet as described above, if even a very small bubble enters even a small amount, naturally, that portion is irregularly reflected. In some cases, the sheet surface appears to be dusty, and there is a concern that the image may be messed up.
The above-mentioned Patent Document 1 is based on the premise that no bubbles enter between the sheet material. However, as a practical problem, regardless of whether the work is manual or mechanical, when sticking sheets together, regardless of the size of the bubbles, unevenness on the surface of the adhesive layer, There has been a problem that air bubbles easily enter between the sheet material due to blurring, bonding angle, and the like.

In particular, when a pressure-sensitive adhesive layer and a long release paper are laminated on one side of a sheet material so that the sheet holding roll can be fed out in a wound state and the bonding process is simplified, When separating and winding the release paper with the take-up shaft, at the moment when the conveyance / winding of the long release paper is stopped, the release paper is taken up by the take-up shaft and supported by the sheet holding roll (support shaft). The paper (after separation of the sheet material) may rotate due to inertial force, and sag may occur in the sheet material (release paper lamination state) upstream of the separation paper separation position. Thus, if there is slack in the sheet material upstream of the separation position, the separation angle when the sheet material body separates from the release paper varies, and if the sheet material is loosened and sticks to the other sheet material, When crimping, problems such as wrinkles and mixing of bubbles between the media occur.
In addition, due to variations in the separation angle, a deviation from a desired attachment position occurs, resulting in poor bonding, and when there is a deviation in the slack between the front side and the back side of the apparatus, there is a disadvantage that an oblique curl occurs. .
The present invention has been made in view of such a situation, and an object of the present invention is to provide a sheet material sticking apparatus and an image forming apparatus capable of solving the above-described problems and performing good bonding.

In order to solve the above problems, the invention according to claim 1 is directed to a second sheet material having an adhesive layer on one side thereof obliquely from a non-parallel direction with respect to the first sheet material conveyed in a certain direction. And a separation unit for separating the release paper laminated on the adhesion layer of the second sheet material on the upstream side of the adhesion unit. With respect to the sheet holding roll that feeds out the second sheet material held in a wound state, the second sheet material in a state where the release paper is laminated, and the second holding member, and the sheet holding roll. And a torque limiter that applies a rotational force in a direction opposite to the feeding direction of the sheet material.
The invention according to claim 2 is the sheet material sticking apparatus according to claim 1, wherein the torque limiter is coaxially attached to a shaft portion of the sheet holding roll.
The invention according to claim 3 is the sheet material sticking apparatus according to claim 1, further comprising an auxiliary roller that is pressed against the outer periphery of the shaft portion of the sheet holding roll and rotates with the torque limiter. It is mounted on the same axis.
According to a fourth aspect of the present invention, in the sheet material sticking apparatus according to the second or third aspect, the conveyance of the second sheet material is stopped via the torque limiter with respect to the sheet holding roll. And means for temporarily applying a driving force that rotates in a direction opposite to the conveying direction.

The invention according to claim 5 is the sheet material sticking apparatus according to claim 2 or 3, wherein the second sheet material is transported with respect to the sheet holding roll via the torque limiter. Is provided with means for applying a driving force that rotates in the opposite direction.
Invention of Claim 6 is a sheet | seat material sticking apparatus as described in any one of Claims 1 thru | or 5. WHEREIN: While the said 1st sheet material is comprised with the transparent sheet which has a transparent part in at least one part. The second sheet material is composed of an opaque sheet, and an image is formed on the first sheet material, and the first sheet material and the second sheet material are adhered so as to sandwich the image. Features.
The invention described in claim 7 is characterized in that the post-processing apparatus includes the sheet material sticking apparatus according to any one of claims 1 to 6.
According to an eighth aspect of the present invention, there is provided an image carrier that carries a toner image, a transfer device that transfers the toner image of the image carrier to a first sheet material, a first sheet material that has the toner image, and a second sheet material. In an image forming apparatus provided with a sheet material adhering apparatus having an adhering means for adhering the first sheet material and the second sheet material by conveying the sheet material obliquely, the sheet material adhering apparatus includes: It is a sheet | seat material sticking apparatus as described in any one of Claims 1 thru | or 7, It is characterized by the above-mentioned.
According to a ninth aspect of the present invention, in the image forming apparatus according to the eighth aspect, a small particle size polymerized toner is used as the toner.
According to a tenth aspect of the present invention, the first sheet material and the second sheet material having a pressure-sensitive adhesive layer and laminating long release paper are conveyed so as to be obliquely crossed and separated from the first sheet material. A sheet material adhering method for adhering the second sheet material after paper separation with a required adhering angle, wherein the second sheet material and the laminated release paper are held so that they can be fed out in a wound state. The sheet holding roll is provided with a torque opposite to the direction in which the release paper is conveyed.

According to the present invention, a torque that is opposite to the direction in which the release paper is conveyed is applied by the torque limiter to the sheet holding roll that holds the second sheet material and the laminated release paper in a wound state. As a result, the slack of the second sheet material at the release paper separation position is suppressed, and the separation angle of the non-transparent medium from the release paper becomes constant. It is possible to provide a sheet material sticking apparatus that can prevent wrinkles, slanted curls, and bubbles from being mixed and obtain good sticking results.
In particular, when used in an electrophotographic image forming apparatus, an image formed by the apparatus (which is very preferably formed using a small particle size polymerized toner), a transparent sheet (first sheet material), white paper, etc. In the case of obtaining an image recording sheet stuck so as to be sandwiched between non-transparent sheets (second sheet material), the formation of bubbles between the sheet materials can be suppressed, and as a result, images with high gloss and texture can be easily and reliably obtained. An image forming apparatus to be formed can be provided.

Hereinafter, embodiments of a sheet material sticking apparatus and an image forming apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of the image forming apparatus, FIG. 2 is a diagram showing a schematic configuration of a photoconductor unit, and FIG. 3 is a configuration diagram of a sheet material sticking apparatus according to the present invention. As shown in FIG. 1, the sheet material sticking device according to the present embodiment shown in FIG. 3 is exemplified by a device (paper post-processing device) retrofitted to an electrophotographic image forming device (corresponding to full color). Yes. First, an outline of the image forming apparatus will be described before the sheet material sticking apparatus according to the present embodiment is described in detail.
As shown in FIG. 1, the image forming apparatus according to this embodiment includes four image forming units 1Y for forming images of each color of yellow (Y), cyan (C), magenta (M), and black (K). 1C, 1M, 1K. Note that the color order of Y, C, M, and K is not limited to that in FIG.
Each of the image forming units 1Y, 1C, 1M, and 1K uniformly charges the surface of the photosensitive drum 11Y, 11C, 11M, and 11K as an image carrier and an enlarged view of FIG. The toner remaining on the surface of the photosensitive drum after the toner image on the surface of the photosensitive drum is transferred to the transfer conveyance belt 60 by the charging means such as the charging roller 14, the developing means 10 and the primary transfer unit 6 is removed from the surface of the photosensitive drum. And a cleaning means 15 for performing the above operation. The arrangement of the image forming units 1Y, 1C, 1M, and 1K is set so that the rotation axes of the photosensitive drums are parallel to each other and arranged at a predetermined pitch in the moving direction of the first sheet material. ing. A transparent sheet (non-transparent medium) that can be used as the first sheet material will be described later.

Below the image forming units 1Y, 1C, 1M, and 1K, a light source, a polygon mirror, an f-θ lens, a reflecting mirror, and the like are provided, and on the surface of each of the photosensitive drums 11Y, 11C, 11M, and 11K based on the image data. An optical writing unit 3 that irradiates while scanning with laser light is disposed, and a primary transfer as a belt driving device having a transfer conveyance belt 60 that conveys the toner images of the respective image forming units so as to be superimposed and transferred thereon. Unit 6 is arranged. A cleaning device 85 including a brush roller and a cleaning blade is disposed on the outer peripheral surface of the transfer conveyance belt 60 so as to come into contact therewith. The cleaning device 85 removes foreign matters such as toner adhering to the transfer conveyance belt 60.
On the right side of the primary transfer unit 6, a first sheet material (transparent recording medium) such as a transparent sheet on which the toner image formed by the image forming units 1 Y, 1 C, 1 M, and 1 K and transferred to the transfer conveyance belt 60 is used as transfer paper. ) A secondary transfer unit 7 for transferring an image to 100 is disposed, and a belt fixing type fixing unit 8 is provided above the secondary transfer unit 7. In the lower part of the image forming apparatus, paper feed cassettes 4a and 4b on which the first sheet material 100 is placed are provided. Further, a manual feed tray 4c for manually feeding paper from the side of the image forming apparatus is provided. In addition, toner replenishing containers 5Y, 5C, 5M, and 5K are provided, and a waste toner bottle and a power supply unit (not shown) are also provided.

The developing devices 10Y, 10C, 10M, and 10K as developing means have the same configuration, and are two-component developing type developing devices that use a carrier and toner that differ only in the color of the toner used. And a developer composed of a magnetic carrier.
As shown in FIG. 2, the developing devices 10Y, 10C, 10M, and 10K include a developing roller 12 that faces the photosensitive drum 11, a screw 13 that conveys and stirs the developer, a toner concentration sensor, and the like. The developing roller 12 includes an outer rotatable sleeve and a magnet fixed on the inner side. The developing roller 12 holds toner together with a magnetic carrier on the surface of the sleeve that is rotated by the magnetic force of the magnet. The electrostatic latent images are formed into toner images by supplying toner to the electrostatic latent images corresponding to the respective colors formed on the surfaces of the drums 11Y, 11C, 11M, and 11K by electric field force. In accordance with the output of the toner density sensor, toner is supplied from the toner supply device.

  In the image forming apparatus according to the present embodiment, as shown in FIG. 2, each of the photosensitive units 2Y, 2C, 2M, and 2K includes a developing device 10, a charging roller 14, and a cleaning device that are attached to the outer periphery of the photosensitive drum 11. The device 15 is integrally formed with the photosensitive drum 11 to form a cartridge. For this reason, the photoreceptor units 2Y, 2C, 2M, and 2K are detached from the main body of the image forming apparatus, and can be easily repaired or replaced. Such a process cartridge of each of the photoreceptor units 2Y, 2C, 2M, and 2K does not need to be a process cartridge in which the photoreceptor drum 11, the developing device 10, the charging roller 14, and the cleaning device 15 are integrated. If necessary, a cartridge in which two types of devices such as the photosensitive drum 11 and the developing device 10 or the charging roller 14 are integrated may be used.

A case where a toner image is formed on the first sheet material 100 (transparent sheet) in order to form an image with a photographic quality by this image forming apparatus will be described. In the present embodiment, the electrostatic latent image formed on the photosensitive drum 11 by the optical writing unit 3 is formed as a mirror image by selecting and setting the optical writing unit 3 to the mirror image mode. Then, the mirror image toner image is also transferred and formed on the first sheet material 100 via the transfer conveyance belt 60.
First, a predetermined voltage is applied to the charging roller 14 from a power source (not shown) to charge the surface of the opposing photosensitive drum 11. The surface of the photosensitive drum 11 charged to a predetermined potential is subsequently scanned with laser light based on the image data by the optical writing unit 3 to write an electrostatic latent image as a mirror image. When the surface of the photosensitive drum 11 carrying the electrostatic latent image reaches the developing device 10, toner is supplied to the electrostatic latent image on the surface of the photosensitive drum 11 by the developing roller 12 arranged to face the photosensitive drum 11. A toner image is formed. The above operation is performed at a predetermined timing in the same manner for all of the photosensitive units 2Y, 2C, 2M, and 2K, and toner images of predetermined colors are formed on the surfaces of the photosensitive drums 11Y, 11C, 11M, and 11K, respectively. . The toner images of the image forming units are transferred onto the transfer / conveying belt 60 in a superimposed manner, and a mirror image is formed on the first sheet material 100.

When it is desired to obtain a photographic image recording sheet, the first sheet material 100 on which the mirror image 100a is formed passes through the conveying roller pair 19 and the switching claw 18, and the three downstream conveying roller pairs 26, 27 and 28, and conveyed to a sheet material sticking device (post-processing device) 9. In the sheet material sticking device 9, a second sheet material 91 made of a non-transparent medium such as white paper having an adhesive layer on one surface, a mirror image 100a formed on one surface of the first sheet material 100, and a second sheet material A sheet-like body having a photo-like image with high gloss and texture is created by adhering the 91 adhesive layer 91b facing each other (see FIGS. 8 to 7).
The first sheet material 100 is conveyed from any of the paper feed cassettes 4 a and 4 b or the manual feed tray 4 c and stops once when it reaches the registration roller 4. The toner images on the photosensitive drums 11 are sequentially transferred onto the transfer conveyance belt 60 at the image forming operation timing of the photosensitive units 2Y, 2C, 2M, and 2K. The toner image is transferred from a primary transfer roller 67Y, 67C, 67M, 67K, which is disposed opposite to each of the photosensitive drums 11Y, 11C, 11M, 11K with the transfer conveyance belt 60 interposed therebetween, from a power source (not shown). This is done by applying a voltage having a polarity opposite to that of the toner above.
Then, the toner image that has passed through the position facing the photosensitive drum 11K and overlaid with the four color toner images is transferred onto the first sheet material 100 fed by the registration roller 17 by the secondary transfer unit 7. The The first sheet material 100 is subsequently conveyed to the fixing unit 8 where the image is fixed by receiving heat and pressure. The first sheet material 100 after image fixing is pasted to a non-transparent medium (second sheet) when passing through a sheet material sticking apparatus according to the present invention, which will be described later (details will be described later). It becomes the sheet of.

  Note that the image forming apparatus according to the present embodiment can form (print) a desired image on a normal recording sheet made of a paper material or the like in addition to the first sheet material 100 made of a transparent sheet material. If the writing unit is set to the standard mode, a normal image can be printed on normal paper. When this standard mode is selected, the switching claw 18 is operated and the recording sheet fixed by the fixing unit 8 is fed to the sheet discharge roller 20 side by the conveying roller pair 19 to be connected to the sheet material sticking device. The paper is discharged to the paper discharge tray 21 regardless of the relationship. Further, this image forming apparatus is also provided with a double-sided printing mechanism, and the sheet material such as recording paper that has passed through the fixing unit 8 is switched by the switching claw 22 and is transported to the reversing roller pair 23 and temporarily stopped. Thereafter, the sheet is reversely fed by the reverse roller pair 23, and the conveyance path is conveyed to the duplex printing conveyance path 25 by switching the switching claw 24, and is fed again to the registration roller 17. The sheet material fed to the registration roller 17 is turned upside down and the toner image is transferred by the secondary transfer unit 7, fixed by the fixing unit 8, and fed to the conveying roller pair 19.

Next, an embodiment of a sheet material sticking apparatus according to the present invention will be described with reference to the drawings. In the sheet material sticking apparatus 9 according to the present embodiment shown in FIG. 3, white paper is used as the base material 91a, and an adhesive layer 91b is formed on the entire surface of the base material 91a so as to be formed on the adhesive layer 91b. A second sheet material 91, which is a non-transparent medium on which release paper 92 is placed and laminated, is used (see FIGS. 6 to 9).
The second sheet material 91 on which the pressure-sensitive adhesive layer has been formed is rolled up in a state of being cut into a predetermined size and a predetermined width on a release paper 92 that is a mount, and the sheet material adhering device 9 The sheet holding roll (non-transparent medium roll) 90 is supported. The sheet holding roll 90 that holds the second sheet material and the laminated release paper so as to be able to be fed out in a wound state is provided with a torque limiter (to be described in detail later) serving as torque braking / torque forward means. ing. The release paper 92 of the sheet holding roll 90 is conveyed while being pulled by the release paper conveyance rollers 110 a and 110 b, and is taken up by the release paper take-up shaft (roller) 94.
At this time, the sheet material drawn from the roll-shaped sheet material is separated into the second sheet material 91 and the release paper 92 by the separation plate (separation unit) 93, and the release paper 92 is supplied to the release paper transport rollers 110a and 110b. Is taken up by a release paper take-up roller (hereinafter, take-up shaft) 94. As described above, when the release paper 92 is wound on the winding shaft 94, the leading end portion 911 of the second sheet material 91 is obliquely crossed with the conveying direction A of the first sheet material 100 (crossing a non-parallel oblique direction). ) In the direction B.
The characteristic configuration of the present invention is that the second sheet material 91 having the adhesive layer 91b on one side is obliquely supplied from a non-parallel direction to the first sheet material 100 conveyed in a certain direction. Adhesion provided with the adhering part 103 bonded through the layer 91b, and the separating part 93 for separating the curvature of the release paper 92 laminated on the adhesive layer of the second sheet material on the upstream side of the adhering part Means, a sheet holding roll S that holds the second sheet material in a state of being laminated with release paper in a wound state, and feeds out the second sheet material, and a feeding direction of the second sheet material with respect to the sheet holding roll And a torque limiter TR that applies a rotational force in the opposite direction.
In addition, when the front-end | tip of the 2nd sheet material supplied from the diagonal direction with respect to the 1st sheet material contacts, the conveyance speed of both sheet materials is different, and sticking via an adhesive bond layer is not completed. However, the second sheet material is conveyed at the same speed as the first sheet material at the time when the attachment of both sheet materials is completed.

The state at the time of actually bonding a non-transparent medium is demonstrated with reference to the expanded sectional view of the principal part of the adhering site | part vicinity shown in FIG. 4, FIG. However, FIG. 4 for comparison with the embodiment shows a state at the time of sticking in which “sag” occurs in the case of the conventional configuration in which the torque limiter is not added, and FIG. 5 shows the case of the embodiment. ing.
When the take-up shaft 94 winds the release paper 92, the sheet holding roll 90 also rotates at the same time, and the second sheet material (non-transparent medium) 91 is conveyed, but as described above, the take-up shaft 94 is stopped. At the moment when the sheet is held, the sheet holding roll 90 is rotated by the inertial force, and in the conventional apparatus having no torque limiter as shown in FIG. Sagging may occur upstream. That is, when the release paper transport rollers 110a (drive) and 110b (driven) transport the release paper 92, the sheet holding roll 90 also rotates simultaneously to transport the non-transparent medium, but the release paper transport rollers 110a and 110b At the moment when the sheet is stopped, the sheet holding roll 90 rotates due to the inertial force, and the release paper 92 holding the second sheet material 91 may sag as shown in FIG. In addition, the driving force of the release paper transport roller 110a is transmitted from the motor via a gear. However, if there is a backlash backlash at the meshing portion of the gear, the release paper transport rollers 110a and 110b are slightly reversed. This is possible, and the release paper 92 may sag. If there is slack in the second sheet material 91 and the release paper 92 upstream of the separation position, the second sheet material 91 that has left the separation plate (separation part) 93 is affected by the slack as shown in FIG. Since the separation angle at the time of separation varies, there is a possibility that the bonding angle varies and a deviation from a desired attachment position occurs. The inventors have already investigated that air bubbles are likely to be formed between the first sheet material 100 and the second sheet material 91 depending on the bonding angle θ between the first sheet material 100 and the second sheet material 91. . This is briefly described here.

6 and 7 show this relationship. FIG. 6 shows a case where the bonding angle θ is as small as 10 degrees or less, and FIG. 7 shows a case where the bonding angle θ is as large as 30 degrees or more. 8 and 9 schematically show cross-sectional views of the case where there is a bubble and the case where there is no bubble, respectively. When bubbles enter, the light from the transparent medium is refracted into the bubbles, and the refracted light appears to shine as irregular reflection, so the uniformity of the white part is disturbed.
As is clear from FIG. 6, when the bonding angle is small, the joining portion (sticking portion) 103 is positioned in front of the pressure rollers 95a and 95b, and the mirror image image 100a of the first sheet material 100 and the second sheet material. Bubbles 104 are formed between the pressure-sensitive adhesive layer 91b and the pressure-sensitive adhesive rollers 95a and 95b, and the bubbles 104 remain without disappearing. Thus, when the bubble 104 is formed between the mirror image 100a of the first sheet material 100 and the adhesive layer 91b of the second sheet material 91, as shown in FIG. 8, the first sheet is a transparent sheet. Since the light from the sheet material 100 is refracted in the bubbles 104 and the refracted light appears to shine as irregular reflection, the uniformity of the white portion is disturbed and the gloss and texture of the image are impaired.

On the other hand, as shown in FIG. 7, when the bonding angle θ is as large as 30 degrees or more, the joining portion 103 is in the vicinity of the pressure rollers 95a and 95b, and the mirror image image 100a of the first sheet material 100 and the second sheet material. The formation of bubbles 104 between the adhesive layer 91b 91 and the adhesive layer 91b is suppressed. As a result, as shown in FIG. 9, the uniformity of the white portion of the base material 91a without the toner image 100a is maintained, and an image with excellent gloss and texture can be obtained. The bonding angle θ at which the formation of such bubbles 104 is suppressed is preferably 30 degrees or more and less than 90 degrees.
Further, if the second sheet material 91 is in a slack state, a deviation from a desired attaching position occurs, and the second sheet material 91 is attached to the first sheet material (transparent recording medium) 100 in an unintended state. When crimping with 95a and 95b, there is a problem that wrinkles are generated or there is a deviation between the slack on the front side and the back side of the device and oblique curling occurs. Increase.

As described above, when sagging occurs in the conventional apparatus, when the first sheet material 100 and the second sheet material 91 are pressed and adhered by the pressure-bonding rollers 95a and 95b due to the influence, wrinkles are generated and between the sheet materials. In many cases, there is a problem that slanted curl occurs if there is a problem such as mixing of air bubbles or there is a deviation between the slack on the front side and the back side of the apparatus.
Therefore, in this embodiment apparatus, in order to suppress the influence of sagging and maintain the bonding angle θ in an appropriate state, a torque in the direction opposite to the release paper carrying direction is applied to the sheet holding roll spindle 90 ′. By providing the applied torque limiter TR as a torque braking / torque forward means, the release paper is prevented from sagging (see FIG. 5). Here, the torque braking / torque forward means means a means having a function of applying a braking force to a small torque, but for a torque exceeding a certain value, thereby causing a forward movement with an anti-torque force. To do.

(A), (b) of FIG. 5 has shown sectional drawing of the sticking site | part vicinity in the sheet | seat sticking apparatus of embodiment, (a) is an axial orthogonal direction sectional view, (b) is axial parallel. A cross-sectional view is shown. FIG. 5C also shows an axial parallel sectional view of another embodiment of the torque limiter. The torque limiter TR is attached to a shaft end of a sheet holding roll main body 90 and a sheet holding roll support shaft 90 'fixedly supported by the sheet holding roll main body.
The torque limiter TR is rotated with a load smaller than the torque for rotating the sheet holding roll by the conveyance force of the second sheet material 91, and the second sheet material 91 itself pulled out and extended, and the sheet is held when the conveyance is stopped. The roll 90 is not rotated by the inertial force (including the wound second sheet material 91), and functions as a braking means to prevent the sheet holding roll from rotating by the inertial force or the like. .

As clearly shown in FIG. 5 (b), the end surface of the support shaft 90 'of the sheet holding roll 90 is slidably in contact with a substantially disc-shaped sliding member 120 having an appropriate friction property. Yes. The sliding member 120 is fixed to the stationary support base B on the housing side. The end surface of the sliding member 120 on the axially outer side is fixed to the support base B so as not to rotate. The threaded portion protruding from the center of the end portion of the support shaft 90 'is inserted through the through hole in the center of the sliding member 120, and the tip end portion of the threaded portion is nut-fixed via the coil spring 121, whereby the support shaft 90'. And the sliding annular surface 120a of the sliding member 120 are in pressure contact with each other. Therefore, with a small torque such as the rotational inertia force during conveyance of the sheet holding roll 90, the relative rotation between the support base B and the sheet holding roll 90 is suppressed, and the sheet holding roll 90 is braked. However, the support base B and the sheet holding roll 90 rotate relative to a large torque (conveying force) greater than a certain level applied to the sheet holding roll 90 during conveyance due to the conveyance roller, so that the second sheet material 91 is rotated. Will not interfere with the transport.
In FIG. 5B, the torque limiter TR is provided at the end of the sheet holding roll support shaft 90 ′. However, as shown in FIG. Alternatively, a torque limiter TR may be arranged in an annular shape. In FIG. 5C, a cylindrical sliding member 120A is disposed between the fixed thin shaft 90A ′ and the sheet holding roll main body 90B ′, thereby sliding the inner peripheral surface of the sliding member 120A. A torque limiter TR having a moving surface 120a is configured.

In the case of the above-described configuration shown in FIG. 5, the conditions under which the release paper is normally conveyed are shown in the following equation (1).
F1> T / r + F2 (1)
Where each symbol is
F1: Release paper conveyance force T: Torque applied to the non-transparent medium roll shaft from the torque limiter TR r: Radius of the second sheet material wound on the sheet holding roll,
(= Distance from roll axis to second sheet material outermost periphery)
F2: Rubbing force between the release paper and the separation plate (friction force)
(See FIG. 5).
That is, when the sheet is not being conveyed, the sheet holding roll 90 side of the torque limiter TR portion is moved to the fixed side by the torque generated in the sheet holding roll 90 based on the sheet material pulling force out of the conveying force of the release paper conveying rollers 110a and 110b On the other hand, it is rotated relative to the second sheet material, and the second sheet material is drawn out by a necessary amount while keeping the pulled state. However, when the conveyance is stopped and the torque (at the time of the conveyance) disappears, the sheet holding roll 90 tries to continue the rotation by the inertial force, but the torque based on this causes a relative rotational movement at the torque limiter TR section. Therefore, the sheet holding roll 90 is braked by the torque limiter TR, and the second sheet material does not sag. In this way, the second sheet material upstream of the separation position 105 is prevented from sagging, the posture of the second sheet material (with the adhesive layer) is maintained in a desired state, and the base material separated from the release paper ( The separation angle of the non-transparent medium) 91a from the release paper (and hence the sticking angle) can be made constant.

Furthermore, the present invention is not limited to the provision of the torque limiter TR. When the release paper transport rollers 110a and 110b are stopped, the sheet holding roll support shaft 90 ′ is temporarily set in the transport direction via the torque limiter TR. May be controlled to rotate in the opposite direction. In this way, even if the release paper 92 has slack, the second sheet material 91 is rewound onto the sheet holding roll 90 before the next bonding operation, and the slack can be eliminated. Alternatively, the sheet holding roll support shaft 90 ′ may be always driven to rotate in the direction opposite to the conveyance direction via the torque limiter TR, and the release paper 92 can be prevented from sagging during the conveyance of the release paper. Become.
The torque limiter TR does not have to be provided directly on the sheet holding roll 90, but is provided with an appropriate auxiliary roller that is pressed against the outer periphery of the sheet holding roll 90, and the torque limiter TR is coaxial with the auxiliary roller. The same operation and effect can be obtained even if the structure is attached to the. Also in this case, as described above, when the conveyance of the second sheet material is further stopped, a driving force that temporarily rotates in the direction opposite to the conveyance direction is applied via the torque limiter TR, Alternatively, during conveyance of the second sheet material, a driving force that rotates in the direction opposite to the conveyance direction is applied to the sheet holding roll via the torque limiter TR, thereby preventing the sagging more reliably. It is also good.

The second sheet material 91 fed out in this manner intersects the conveyance path of the first sheet material 100 conveyed in the conveyance direction by the conveyance roller 97, and the leading end portion 911 of the second sheet material 91 is required. (The angle with respect to the first sheet material 100) is in cross contact with the front end portion 101 of the first sheet material 100 (intersection portion 103), and the front end portion of the first sheet material 100 is formed by the adhesive layer 91b of the second sheet material 91. 101 and the leading end portion 911 of the second sheet material 91 adhere to each other and are conveyed to the pressure rollers 95a and 95b in the extending direction of the conveyance path of the first sheet material 100, and the first sheet material 100 and the pressure rollers 95a and 95b The base material 91a of the second sheet material 91 is securely adhered integrally with the adhesive layer 91b. Since the sag of the second sheet material 91 is removed and the separation angle is kept constant, good bonding can be performed. In this way, since misadhesion is prevented and bubbles are prevented from entering when the two media are adhered, the uniformity of the white portion without the toner image on the obtained sheet-like body can be maintained (FIG. 9). reference).
Thereafter, the first sheet material 100 and the second sheet material 91 are adhered to one sheet-like body and conveyed downward by the conveying roller 98, and the leading end of the sheet-like body is positioned by a positioning member (not shown). It is cut into a predetermined shape by the cutters 99 a and 99 b and stored in the tray 102. Note that the sheet-like body cut into a predetermined shape can be discharged out of the apparatus without being stored in the tray 102.

  In the present embodiment, as shown in FIG. 3, the first sheet material 100 and the second sheet material 91 have first detection means (of the conveyed sheet material) on the upstream side of the joining portion 103. Sensors 111 and 112 capable of detecting the leading end portion 101 of the sheet material 100 and the leading end portion 911 of the second sheet material 91, respectively, are provided, and the abnormal operation can be detected by these sensors 111 and 112, and the first sheet The leading end portion 101 of the material 100 and the leading end portion 911 of the second sheet material 91 are detected, and the second is controlled by finely adjusting the timing by controlling the conveyance speed so that the leading end portions of these sheet materials coincide with each other. The sheet material 91 and the first sheet material 100 are conveyed, and it is possible to finely adjust the leading end positions of the both.

As described above, according to the present embodiment, since the torque limiter TR for applying the torque in the direction opposite to the release paper conveyance direction is added to the sheet holding roll, the slack is removed, as shown in FIG. The non-transparent white medium (second sheet member) 91 after peeling the release paper proceeds with the separation angle kept constant, and a stable laminating angle is obtained. It is possible to avoid contact at an undesired position between them, and it is possible to prevent bubbles from entering when two sheet materials (medium) are bonded. As a result, it is possible to easily and reliably create a target image sheet having an image with high gloss and texture, such as the uniformity of the white portion where there is no toner image.
Further, as indicated by a broken line in FIG. 3, an auxiliary roller 125 that is pressed against the outer periphery of the shaft portion of the sheet holding roll S and rotates is provided, and a torque limiter TR is attached to the shaft of the auxiliary roller, thereby providing the auxiliary roller 125. Thus, the sheet holding roll S may be braked.
In each of the above embodiments, a transparent sheet is used as the first sheet material 100. However, as shown in plan views in FIGS. 11, 12, and 13, a part of the sheet material is used. Only the transparent part 100b may be used, and the other part 100c may be an opaque part. In each diagram schematically shown, the hatched portion indicates a non-transparent portion, and the white frame indicates a transparent portion. The arrow indicates the conveyance direction of the first sheet material (paper).
FIG. 14 shows an original image, image formation, and image recording sheet creation when using a sheet material having such a partially opaque portion 100c. As shown in FIG. 14, the original image is created on the transparent portion 100b of the sheet material 100 using a mirror image 100a using the above-mentioned image forming apparatus, and the sheet material pasting apparatus of the image forming apparatus is used for this. White paper having an adhesive layer is laminated.

Moreover, in the said embodiment, although what formed the transparent adhesive layer 91b on the base material 91a which consists of white paper was used as the 2nd sheet | seat material 91, it is not restricted to this, Transparent base is used as the base material 91a. It is also possible to use a material in which a non-transparent adhesive monk is formed by mixing a white pigment or the like in an adhesive layer.
Further, as the toner used for image formation in the image forming apparatus in the present embodiment, it is preferable to use a small particle size polymerized toner, particularly a toner having a particle size of 6 μm or less. By using such a small particle size polymerized toner, the photographic image quality can be further improved and the texture can be enhanced.
In the above embodiment, the image forming apparatus is externally attached to the sheet material sticking apparatus as a post-processing apparatus. However, the image forming apparatus may include the sheet material sticking apparatus.
As mentioned above, although the sheet | seat material sticking apparatus and image forming apparatus concerning this Embodiment were demonstrated, embodiment mentioned above shows an example of suitable embodiment of this invention, and this invention is limited to it However, various modifications can be made without departing from the scope of the invention.

It is sectional drawing which shows schematic structure of the state which connected the image forming apparatus concerning embodiment of this invention, and a sheet material sticking apparatus. FIG. 2 is a cross-sectional view illustrating a schematic configuration of a photoreceptor unit used in the image forming apparatus illustrated in FIG. 1. It is sectional drawing which shows schematic structure of one Embodiment of the sheet material sticking apparatus concerning this invention used with the image forming apparatus shown in FIG. It is sectional drawing of the sticking site | part vicinity in the conventional sheet material sticking apparatus. (A) is a cross-sectional view in the direction perpendicular to the axis in the vicinity of the adhering site in the sheet material adhering apparatus of the embodiment, (b) is an axial parallel cross-sectional view, and (c) is an axial parallel cross-sectional view of another example. It is typical sectional drawing which shows the case where the bonding angle in the case of bonding a 1st sheet material and a 2nd sheet material with a pressurizing roller is small. It is typical sectional drawing which shows the case where the bonding angle in the case of bonding a 1st sheet material and a 2nd sheet material with a pressure roller is large. It is sectional drawing which shows the reflective state of the light of the sheet | seat material on which the 1st sheet | seat material and the 2nd sheet | seat material were bonded together by the state which has a bubble. It is sectional drawing which shows the reflective state of the light of the sheet | seat material on which the 1st sheet | seat material and the 2nd sheet | seat material were pasted together in the state without a bubble. It is sectional drawing of the sticking site | part vicinity in the sheet material sticking apparatus of embodiment. It is a figure which shows the modification of the 1st sheet | seat material concerning this invention. It is a figure which shows the other modification of the 1st sheet | seat material concerning this invention. It is a figure which shows the 3rd modification of the 1st sheet | seat material concerning this invention. (A)-(d) is a top view which shows the mode of the image recording sheet preparation concerning embodiment.

Explanation of symbols

1Y, 1C, 1M, 1K Image forming unit, 2Y, 2C, 2M, 2K Photosensitive unit, 3 Optical writing unit, 6 Primary transfer unit, 7 Secondary transfer unit, 8 Fixing unit, 9 Sheet material bonding device, 10Y 10C, 10M, 10K developing device, 11Y, 11C, 11M, 11K photosensitive drum, 14 charging roller, 15 cleaning means, 85 cleaning device, 90 sheet holding roll (non-transparent medium roll), 90 ′ (sheet holding roll ) Support shaft, 91 Second sheet material, 91a Base material, 91b Adhesive layer, 92 Release paper, 93 Separation plate, 94 Release paper take-up shaft, 95a, 95b Pressure roller, 100 First sheet material (transparent medium), 100a Image, 101 (first sheet material) tip, 911 (second sheet material) tip, 103 Part, 104 bubble, 105 separation position, 110a, 110b release paper conveyance roller, 111, 112 sensor (detection means), 120, 120a sliding member, 125 auxiliary roller, TR torque limiter

Claims (10)

A first sheet material conveyed in a certain direction, a second sheet material having a pressure-sensitive adhesive layer on one side is obliquely supplied from a non-parallel direction and bonded via the pressure-sensitive adhesive layer, and A pasting means comprising a separating section for separating the release paper laminated on the adhesive layer of the second sheet material on the upstream side of the pasting section;
A sheet holding roll for feeding out the second sheet material held in a wound state, the second sheet material in a state where the release paper is laminated;
A sheet material adhering apparatus comprising: a torque limiter that applies a rotational force to the sheet holding roll in a direction opposite to a feeding direction of the second sheet material.   The sheet material sticking apparatus according to claim 1, wherein the torque limiter is coaxially attached to a shaft portion of the sheet holding roll. An auxiliary roller that rotates against the outer periphery of the shaft of the sheet holding roll,
The sheet material sticking apparatus according to claim 1, wherein the torque limiter is coaxially attached to the auxiliary roller.   When the conveyance of the second sheet material is stopped, the sheet holding roll is provided with means for applying a driving force that temporarily rotates in the direction opposite to the conveyance direction via the torque limiter. The sheet | seat material sticking apparatus of Claim 2 or 3.   3. The apparatus according to claim 2, further comprising: a driving unit configured to apply a driving force that rotates in a direction opposite to a conveyance direction to the sheet holding roll via the torque limiter during conveyance of the second sheet material. 3. The sheet material sticking apparatus according to 3.   The first sheet material is composed of a transparent sheet having a transparent portion at least in part, and the second sheet material is composed of an opaque sheet, and an image is formed on the first sheet material, and the image is sandwiched between the first sheet material and the second sheet material. The sheet material sticking apparatus according to claim 1, wherein the first sheet material and the second sheet material are stuck together.   The post-processing apparatus provided with the sheet | seat sticking apparatus as described in any one of Claims 1 thru | or 6. An image carrier that carries a toner image, a transfer device that transfers the toner image of the image carrier to a first sheet material, and a first sheet material and a second sheet material that have the toner image are conveyed obliquely. In the image forming apparatus provided with a sheet material adhering device having an adhering means for adhering the first sheet material and the second sheet material,
The image forming apparatus according to claim 1, wherein the sheet material sticking apparatus is the sheet material sticking apparatus according to claim 1.   9. The image forming apparatus according to claim 8, wherein a small particle size polymerized toner is used as the toner. The second sheet material after separating the first sheet material and the release paper by conveying the first sheet material and the second sheet material having a pressure-sensitive adhesive layer and laminating long release papers in an oblique manner And a sheet material sticking method for pasting together,
Applying a torque in a direction opposite to the conveying direction of the release paper to a sheet holding roll that holds the second sheet material and the laminated release paper in a wound state so as to be able to be fed out. How to wear.

Images