JP2009078919A - Pasting device, post-processing device, image forming device, sheet material pasting method, and image sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet pasting device capable of pasting sheet materials to each other without forming air bubbles between the sheet materials. <P>SOLUTION: A pasting means is provided to paste a second sheet material S2, which is formed with an adhesive layer on one surface thereof, to a first sheet material, which is conveyed at a constant speed, through the adhesive layer by supplying the second sheet materials S2, obliquely crossing the first sheet material S1 at a required angle. The second sheet material is accelerated from the state of stopping so as to be brought in contact with the first sheet material at a speed lower than that of the first sheet material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a sheet sticking apparatus, a sheet material sticking method, and an image sheet that can form an image recording sheet having a photographic image.
In particular, a sheet sticking apparatus capable of forming an integral image sheet by laminating a sheet-like medium on which an image is formed by an image forming apparatus such as an electrophotographic method or an ink-jet method, and another sheet-like medium, The present invention relates to a post-processing apparatus, an image forming apparatus, a sheet material attaching method, and an image sheet.

Currently, there are various types of image recording sheets that are sheet products formed by sticking sheets together. For example, there is an image recording sheet in which a transparent sheet on which an image is formed on one side by an electrophotographic image forming apparatus and a white paper as a base material are attached so as to sandwich the image.
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

A problem that arises when sticking such sheet materials together is that air bubbles enter between the sheet materials.
In the above document, there is no description of manual work or mechanical work in sticking the sheet materials together, but in any case, no air bubbles enter between the sheet material and the sheet material. It is assumed that.
However, as a practical problem, regardless of whether the work is manual or mechanical, when sticking sheets together, unevenness on the surface of the adhesive layer, sheet blur, sheet hardness, sticking Air bubbles easily entered between the sheet material due to the angle of alignment.
Further, there are various considerations such as whether or not the sheet material provided with the adhesive layer should be adhered to the other sheet material so as not to make wrinkles after peeling from the release paper.
In particular, in the case where an image recording sheet is formed by pasting and integrating the sheet material and the sheet material as described above, if even a very small bubble enters, naturally, the bubble mixed portion There is a possibility that the image may be ruined and the image may be messed up.
Further, when an image is formed on a transparent sheet by an electrophotographic method, there is a problem that gloss is poor even when the image formed on the sheet is viewed.
This invention is made | formed in view of such a condition, and provides the sticking apparatus which can solve the said problem, a post-processing apparatus, an image forming apparatus, a sheet material sticking method, and the image sheet obtained. Objective.

In order to achieve the above technical problem, the sticking apparatus, the sheet material sticking method, and the image sheet according to the present invention employ the following technical means.
That is, the sticking apparatus according to the invention of claim 1 obliquely supplies the second sheet material provided with the adhesive layer on one side at a required angle to the first sheet material conveyed at a constant speed. Adhesive means for bonding through the adhesive layer is provided, and the second sheet material is accelerated from a stopped state and contacted at a slower speed than the first sheet material.
The sticking apparatus according to a second aspect of the present invention is the sticking apparatus according to the first aspect, wherein the first sheet material includes a transparent portion and an image forming surface including an image formed on the transparent portion, and the second sheet material is opaque. A roll body comprising a sheet and holding and feeding out the second sheet material in a state of being laminated with the release paper on the adhesive layer, on the upstream side of the contact position with the first sheet material Separation means for separating the curvature of the release paper from the second sheet material is provided, and the adhesive layer surface of the second sheet material separated from the release paper by the separation means is brought into contact with the image forming surface of the first sheet material It is characterized by making it.
The sticking apparatus according to a third aspect of the present invention is the sticking apparatus according to the second aspect, wherein the separating means has a contact portion, and the second sheet material fed from the roll body is bent at the contact portion. It is characterized in that the curvature is separated from the release paper.
In the sticking apparatus according to a fourth aspect of the present invention, in any one of the first to third aspects, the sticking means includes a transport section that transports the first sheet material, and the transport section that is transported by the transport section. A feeding section that feeds the second sheet material obliquely toward the conveying direction of the first sheet material so that the second sheet material can be stuck to the one sheet material, and the second sheet material is stuck to the first sheet material When completed, the conveying section and the feeding section are configured so that the conveying speed of the first sheet material and the conveying speed of the second sheet material are equal.

A sticking apparatus according to a fifth aspect of the present invention is the sticking apparatus according to any one of the first to fourth aspects, further comprising a pair of turnable pressure rollers engaged with the second sheet material. The first sheet material and the second sheet material are welcomed and pressed into a nip portion.
According to a sixth aspect of the present invention, there is provided a sticking apparatus according to the fifth aspect, characterized in that means for changing the sticking angle between the first sheet material and the second sheet material is provided upstream of the pressure roller.
According to a seventh aspect of the present invention, there is provided the sticking apparatus according to the fourth aspect, wherein the feeding portion is bent toward the first sheet material side by bringing the tip of the second sheet material fed obliquely into contact with the pressure roller. It is comprised so that it may make it.
The sticking apparatus according to an eighth aspect of the invention is characterized in that, in any one of the second to seventh aspects, the image is formed using a small particle size polymerized toner.
A sticking device according to a ninth aspect of the present invention includes the sensor according to any one of the first to eighth aspects, wherein the first sheet material is input, and the second is detected by the sensor. The conveyance of the sheet material is started.
A post-processing apparatus according to a tenth aspect of the present invention includes the sticking apparatus according to any one of the first to ninth aspects.
An adhering device according to an eleventh aspect of the present invention is an image carrier that carries a toner image, a transfer device that transfers a toner image of the image carrier to a first sheet material, and a first sheet material that has the toner image. In the image forming apparatus provided with the sticking apparatus which has the sticking means which sticks the 1st sheet material and the 2nd sheet material by conveying the 2nd sheet material and the 2nd sheet material so that it can be obliquely crossed, the sheet material sticking device Is the sticking device according to any one of claims 1 to 9.
A sticking apparatus according to a twelfth aspect of the present invention is the image forming apparatus according to the eleventh aspect, wherein a small particle size polymerized toner is used as the toner.

In the sheet material adhering method according to the invention of claim 13, the first sheet material is conveyed at a constant speed, and the second sheet material having the adhesive layer on one side is inclined toward the conveying direction of the first sheet material. Is a sheet material adhering method for adhering the first sheet material and the second sheet material, wherein the conveying speed of the second sheet material is accelerated from a stopped state, The second sheet is brought into contact with the first sheet at a slower speed.
The sheet material adhering method according to the invention of claim 14 is the method according to claim 13, wherein the conveying speed of the first sheet material and the conveying speed of the second sheet material are made constant at the start of adhering after the contact. It is characterized by doing.
According to a fifteenth aspect of the present invention, there is provided a sheet material adhering method according to the thirteenth or fourteenth aspect, wherein the second sheet is fitted to a nip portion of a pair of pressure-bonding rollers that receive and pressure-bond the first sheet material and the second sheet material. The second sheet material is fed out so that the leading end of the material contacts.
According to a sixteenth aspect of the present invention, there is provided the sheet material attaching method according to any one of the thirteenth to fifteenth aspects, wherein the image is formed using a small particle size polymerized toner.
The image sheet which concerns on invention of Claim 17 was obtained using the sticking apparatus as described in any one of Claims 1 thru | or 16.

  According to the present invention, the first sheet material and the second sheet material are conveyed so as to be obliquely crossed, and the first sheet material and the second sheet material intersect at the obliquely intersecting position to start sticking. The second sheet is brought into contact with the image forming surface of the first sheet and the adhesive layer surface of the second sheet at a speed less than the conveying speed of the first sheet from the stopped state. Lateral waves generated mainly when peeling from the release paper are attenuated. Further, after the contact, the second sheet conveying speed is substantially the same as the first sheet conveying speed, and the pasting is started. The pasting angle during pasting gradually becomes smaller than the pasting angle θ0 at the start of pasting. Since it is pasted at a constant angle of the minimum angle θ1, later, when the leading ends of the first sheet material and the second sheet material meet each other, the force dragged by the second sheet is slower than the speed of the first sheet. By suppressing the lateral vibration and the contact angle is large at the time of this first encounter, the contact area is small, and the adhesive force of the adhesive layer of the second sheet acts together with the force dragged at this time, The impact at the time of contact between sheet materials can be suppressed.

Further, the second sheet material, which is softer than the first sheet material, acts to bend by suppressing the impact at the time of contact, and acts to reduce the contact angle between the first sheet material and the second sheet material.
Then, when the second sheet is in close contact with the first sheet and the conveyance speed of the second sheet becomes substantially the same as that of the first sheet, it is possible to ensure a reliable start of sticking. Once sticking starts, the sticking angle gradually becomes smaller than that at the time of contact, so that sticking is suppressed by suppressing the intrusion of bubbles. After that, the sticking angle is almost constant, so sticking is terminated in this state. It becomes.
In particular, an image formed by an electrophotographic image forming apparatus (which is very preferably formed using a small particle size polymerized toner) is attached so as to be sandwiched between a transparent sheet and an opaque sheet such as white paper. In the case of a recording sheet, it is possible to obtain an image sheet having a high image quality that is very close to a photographic image quality and does not contain bubbles.

Next, the sticking apparatus according to the present invention will be described with reference to embodiments.
As shown in FIG. 1, the sticking apparatus according to the present embodiment is exemplified as an apparatus that is retrofitted to an electrophotographic image forming apparatus (supporting full color). First, before explaining the sticking apparatus according to the present embodiment in detail, the outline of the image forming apparatus will be described with reference to FIG. In the figure, symbol A indicates a sheet material sticking device, symbol B indicates an image forming device, symbol S1 indicates a transparent sheet (first sheet material), and symbol S2 indicates an opaque sheet (second sheet material). .
As shown in FIG. 1, the image forming apparatus B has a casing b1 that forms the appearance of the image forming apparatus B and houses each functional unit, and a paper discharge unit b2 that discharges the recording paper on which the image is recorded to the outside. The recording paper before image recording is stored in a stackable manner, and the recording paper is transported and formed so as to connect the paper feeding section b3 that feeds the recording paper for each single sheet, and the paper feeding section b3 and the paper ejection section b2. Toner image forming section b5 that is provided between the recording paper transport path b4, the paper feeding section b3, and the paper discharging section b2 and is capable of forming a full color toner image using small particle size polymerized toner based on image data. A transfer portion b6 for transferring the toner image formed by the toner image forming portion b5 to the recording paper on the recording paper conveyance path b4, and a toner image provided between the transfer portion b6 and the paper discharge portion b2. The transferred recording paper is pressurized and heated to fix the toner image on the recording paper. A fixing unit b7, a reversing unit b8 that is connected to the upstream side and the downstream side of the recording paper transport path b4 so as to straddle the transfer unit b6 and the fixing unit b7, and a recording sheet before image recording is a single leaf. It is configured to include a manual feed tray b9 that is sent out every time, an operation panel, and a control unit (not shown) that controls the entire image forming apparatus B.

Further, the paper discharge section b2 described above discharges the recording paper that has passed through the fixing section b7 into the cylinder, and discharges the recording paper that has passed through the fixing section b7 from the wall surface of the housing b1. The sheet material sticking apparatus A according to the present embodiment is configured to receive the recording paper discharged from the external device connecting paper discharge section b22. It is connected to the forming apparatus B.
The image forming apparatus B configured as described above transfers the toner image formed of the small particle size polymerized toner onto a recording paper (including a transparent sheet having a transparent portion), fixes it, and the in-body paper discharge unit b21. Alternatively, the image is recorded by an electrophotographic process, which is discharged from the external device connection discharge section b22. The image forming apparatus B uses a transparent sheet S1 that can form an image as the recording paper when the image is formed in association with the sticking apparatus A according to the present embodiment. A mirror image of the image P is recorded.

Hereinafter, the sticking apparatus A according to the present embodiment will be described in detail.
The sticking apparatus A according to the first embodiment sets the transport speed of the transparent sheet S1 to a constant speed V1. The sticking apparatus A according to the present embodiment forms an image having a mirror image relationship with the original image on the transparent portion of the transparent sheet having the transparent portion by the image forming apparatus B as described above. The speed V2 of the opaque sheet S2 when the transparent sheet S1 and the adhesive sheet S2 meet (when in contact) when the transparent sheet S2 is accelerated from the stopped state by making the conveyance speed V1 of the transparent sheet on which the mirror image is formed constant. The speed is lower than the speed V1 of the transparent sheet S1 (for example, the ratio V2 / V1 is 0.8 or more and less than 1, preferably 0.85 or more and 0.99 or less). Thereafter, when the conveyance speed V2 of the opaque sheet S2 reaches or reaches the adhering roller 4 (preferably before reaching the adhering roller), it is set to be the same as V1.

[Embodiment 1]
First, the structure of the sticking apparatus A which concerns on this Embodiment 1 is demonstrated.
As shown in FIGS. 1 and 2, the sticking apparatus A according to the first embodiment includes a housing 1, a transport unit 2, a feeding unit 3, a pressure roller pair 4 (pressure bonding unit), and a separation plate. 34 is provided. The transport unit 2 and the feeding unit 3 constitute a sticking unit.
The casing 1 forms the appearance of the sticking apparatus (post-processing apparatus) A. The casing 1 is formed in a box shape in which each of the following functional units can be housed. A recording paper receiving port 1a capable of communicating with the external device connection paper discharge unit b22, an electrical connection unit, and a mechanical connection unit (both not shown) are provided on the side surface. It is designed to be detachably connected.
The transport unit 2 includes a first roller pair 21 that is rotatably provided in the vicinity of the recording paper receiving port 1a, and a second roller pair 22 that is rotatably provided to the lower left of the first roller pair 21; A guide wall (not shown) is provided, and the transparent sheet S1 (mirror image image P recorded) discharged from the external device connecting paper discharge portion b22 toward the recording paper receiving port 1a in a substantially horizontal direction is bent downward. Are configured to be conveyed. The transport unit 2 receives a transparent sheet S1 having a transparent portion based on a control command from the control unit of the image forming apparatus B or between the recording paper receiving port 1a and the roller pair 21. The rotation of each of the roller pairs 21 can be controlled based on the detection result by the sensor that detects the above. When the sticking apparatus A according to the first embodiment is controlled by the sensor to control the operation of the sticking apparatus A according to the present invention by sensing the input of the transparent sheet S1, the sticking apparatus A according to the present invention is cost effective. This is advantageous because it is easy to reduce and control.

The feeding portion 3 is provided substantially directly below the position where the first roller pair 21 is disposed, and can be controlled to rotate to a required position next to the second roller pair 22 (eg, right lateral). A take-up shaft 31, a raw fabric support shaft 32 provided so as to be rotatable at a required position, which is located directly below the position where the take-up shaft 31 is located and above a pressure roller pair 4, which will be described later. An idle shaft 33 provided between the counter-support shaft 32 and the take-up shaft 31 so as to be pivotable at a required position next to it (for example, to the left) and a separating plate (separating means) 34. Has been. The opaque sheet S2 supported in a roller shape by the original fabric support shaft 32 constitutes a roll body. The opaque sheet S2 is wound and held by a roll body and is fed out by a roller body.
The separation plate 34 has a substantially trapezoidal shape with one oblique side, and a lower base and an upper base of the trapezoidal shape are formed along the conveying direction of the first sheet material and the second sheet material, respectively. In addition, the oblique side of the separation plate 34 in the second sheet material is provided as a contact portion 341 so as to be located on the downstream side of the upper bottom, and the contact portion 341 and the lower bottom include a curvature portion 342. It has a structure connected via.
The feeding section 3 is affixed to a strip-shaped release paper S3 so that a rectangular white opaque sheet S2 of a predetermined size is continuous, and is wound so that the opaque sheet S2 is inside. Use the original fabric. Note that an adhesive layer S2a for adhering the transparent sheet S1 is formed on one side of the opaque sheet S2 (FIG. 6), and formed on the adhesive layer S2a formed on one side of the opaque sheet S2 and the release paper S3. The released release layer is bonded together. In the present invention, Tg (glass transition temperature: for example, glass transition temperature determined by DSC (differential scanning calorimeter) described later) of the pressure-sensitive adhesive used in this pressure-sensitive adhesive layer is preferably less than -35 ° C. .

Explaining the set state of the original fabric, as shown in FIG. 2, the original fabric is fed so that the sheet (consisting of the release paper (release sheet) S3 and the opaque sheet S2) is fed out by rotating counterclockwise. Of the sheet pulled out and set on the anti-support shaft 32, only the release paper S3 is folded back by the separation plate 34, and the folded release paper S3 is further hung on the idle shaft 33. For example, as shown in FIG. In addition, it is set on the take-up shaft 31 so that the release paper S3 is wound by turning counterclockwise.
In the feeding unit 3 in which the original fabric is set in this way, the winding shaft 31 starts to rotate (the initial speed of V2 is zero) based on the result of the input signal of the transparent sheet S1 by the sensor described above, and the original fabric is supported. The sheet is fed out from the original fabric set on the shaft 32, and the sheet is continuously bent by the curvature of the tip of the separation plate 34, and the opaque sheet S2 is continuously stressed by increasing the bending angle, and the adhesive layer S2a. When the opaque sheet S2 exceeds a predetermined bending angle at the curvature portion at the tip of the separation plate 34 as shown in FIGS. 3 (a) and 3 (b), the adhesive strength with the release paper S3 is antagonized. Release from the release sheet S3 starts from the start point of release at the tip. Once this peeling is started from the peeling start point, the adhesive force of the adhesive layer of the opaque sheet S2 depends on the adhesive area with the release paper S3, so that the release further proceeds with the release paper S3. As a result, the stress of the opaque sheet S2 is suddenly released, and a predetermined angle smaller than the bending angle of the opaque sheet S2 at the separation plate 34 where the separation start point is generated (at the separation plate 34 and the opaque sheet S2). The separation point is retreated to a position of an angle smaller than the angle at which the separation start point of the separation plate 34 is generated. Thereafter, the opaque sheet S2 is peeled in the vicinity of the predetermined angle until the opaque sheet S2 having a predetermined size is completely peeled off.

On the other hand, when the lateral peeling of the opaque sheet S2 is discussed, the peeling that has occurred from the peeling start point proceeds in the lateral direction at the front end portion of the opaque sheet S2, and immediately before the lateral peeling ends, FIG. c) As shown in FIG. 3 (d), for example, immediately after the end of the end of the leading edge portion is left to the end and the peeling in the horizontal direction is finished, as shown in FIG. Vibrations occur (although in the vertical direction as well).
As shown in FIG. 4 (a), the opaque sheet S2 having a vibration mainly in the lateral direction with the leading end peeled off from the release paper S3 is transferred to the opaque sheet S2 when the transparent sheet S1 is conveyed at a speed V1. As shown in FIG. 4B and FIG. 5A, the leading end is conveyed at a speed V2, and when it encounters the transparent sheet S1, the angle θ0 is smaller than the conveying speed V1 of the transparent sheet S1 (| V1 | > | V2 |). At the time of this encounter, the contact angle (encounter angle) between the transparent sheet S1 and the opaque sheet is encountered at a maximum value of θ0. Since the opaque sheet S2 having the speed V2 is smaller than V1, a force dragged by the transparent sheet S1 acts when the leading ends meet each other. Due to the action of the dragged force and the lateral wave of the opaque sheet S2, these resultant forces act obliquely forward with respect to the opaque sheet S2, and also due to the action of the force dragged by the transparent sheet S1 described above. The encounter angle θ0 between the opaque sheet S2 and the transparent sheet also acts to be small, and the angle at which the opaque sheet contacts the transparent sheet S1 is slightly smaller than the encounter angle θ0. Further, the surface of the opaque sheet S2 that encounters the transparent sheet S1 has an adhesive layer S2a, and the transparent sheet S1 facing this is a mirror image having a minute uneven surface. At the time of encounter, the adhesive force by the adhesive layer S2a also acts. By doing so, the vibration of the opaque sheet S2 mainly having the transverse vibration is further attenuated. Thereafter, the conveyance speed V2 of the opaque sheet becomes equal to the conveyance speed V1 of the transparent sheet, and sticking is started from the leading ends of the sheets to form an image sheet.

FIG. 5B is a diagram illustrating the transport timing of the transparent sheet and the opaque sheet in relation to the detection by the sensor.
In the sticking apparatus A of the first embodiment, it is preferable that the speed V1 of the transparent sheet S1 is constant and is substantially equal to the speed at the recording paper receiving port 1a.
In the sticking apparatus A of the first embodiment, when a sensor (not shown) installed between the recording paper inlets 1a and 21 detects that the transparent sheet S1 enters the sticking apparatus A, the winding is performed. The take-up shaft 31 is driven, the speed of the release paper is controlled by the idle shaft 33, and the original fabric support shaft 32 is driven. Then, the original sheet having the opaque sheet S2 of the original sheet is formed at the leading end portion where the opaque sheet has the curvature of the separating plate (separating means) 34 as shown in FIGS. 4 (a) to 4 (e). Until the separation sheet 34 is separated by curvature separation and encounters the transparent sheet S1 as described above, when the movement of the raw material in the vicinity of the separation plate 34 shown in FIG. Only the sheet-like release paper S3 having no opaque sheet after the leading end of the separation plate 34 (after the release paper is folded according to its curvature) along the separation plate 34. Then, after passing through 33 shown in FIG.

Up to the contact portion 341 of the separation plate 34, the opaque sheet S2 on the leading edge release paper moves following the release paper S3 swelled in the form of a suspended line in the contact portion 341 of the separation plate 34. As shown in FIG. 4 (b), the opaque sheet S2 has a stress against the bending force in the vicinity of the front end of the separation plate 34 due to the adhesive force with the release paper due to the sudden bending by the curvature separation from the front end of the 34. The opaque sheet S2 is peeled off from the release paper. Thereby, as described above, a wave in the horizontal direction is mainly generated in the opaque sheet S2, but the wave generated by the peeling is small in the conveyance direction (longitudinal direction).
On the other hand, as shown in FIGS. 4B and 6B, the transparent sheet S1 conveyed at the constant speed V1 encounters and comes into contact with the opaque sheet S2 mainly having a transverse wave as described above. To do. At the time of this encounter, the conveyance speed V1 of the transparent sheet S1 is larger than the speed V2 of the opaque sheet S2, as described above, and the contact angle between the transparent sheet S1 and the opaque sheet S2 is a large angle (maximum contact angle θ0). .

As described above, when the transparent sheet S1 and the opaque sheet S2 are encountered, the transport speed V1 of the transparent sheet S1 is larger than that of the opaque sheet V2, so that the leading end of the opaque sheet S2 is slightly dragged by the transparent sheet S1. The first contact is made. In this contact, the transverse wave of the opaque sheet S2 is opaque because the opaque sheet S2 has a conveyance speed V2 that is slower than the conveyance speed V1 of the transparent sheet S1, and the opaque sheet S2 is dragged by the transparent sheet S1. Both forces of the adhesive force of the adhesive layer on the sheet with the transparent sheet S1 act and are efficiently damped.
Thereafter, when the bonding of the transparent sheet S1 and the opaque sheet S2 is started, the conveyance speed V2 of the opaque sheet S2 is the same as the conveyance speed V1 of the transparent sheet. As shown in FIG. 4 (e), the contact angle between the transparent sheet S1 and the opaque sheet S2 is minimized at the same speed, and the extension line of the contact portion 341 of the separation plate 34 intersects the transparent sheet S1. The contact angle between the transparent sheet S1 and the opaque sheet S2 is smaller than the angle to be applied. Since the process is performed until the sticking is completed by being held substantially constant at this minimum angle, the image of the obtained image sheet is a photograph-like image in which mixing of air is extremely suppressed.

Similarly, the longitudinal (conveying direction) wave slightly generated when the opaque sheet S2 is peeled off is caused by gradually decreasing the contact angle between the transparent sheet S1 and the opaque sheet S2 at the time of contact with the transparent sheet S1. The angle is smaller than the crossing angle with the contact portion of the separation plate 34, and the state transitions from a bent state (maximum contact angle) to a gradually pulled state when the tip portions of the transparent sheet S1 and the opaque sheet contact each other. Therefore, wrinkles are suppressed. Further, the tension applied to the opaque sheet S2 increases from the time of encountering the transparent sheet to the time of contact with the contact portion 341 of the separation plate 34, and then decreases again by separating from the separation plate 34. It further attenuates through the process of increasing or decreasing the tension.
In this way, the transverse and longitudinal waves generated when the opaque sheet S2 is peeled off are attenuated / suppressed, and the image sheet, which is an adhesive body between the transparent sheet S1 and the opaque sheet S2, is bent and wrinkled. It will be less.
If the horizontal or vertical wave enters the nip portion of the fixing roller (pressing roller pair) 4 and 41 without being attenuated, the obtained image sheet is bent or wrinkled. It will be of little value. The present inventors have detected that bending occurs mainly due to the contribution of a transverse wave, and wrinkles occur mainly due to the contribution of a longitudinal wave.

In the present invention, although not particularly limited, the thickness of the transparent sheet can be, for example, about 100 ± 20 μm, and the obtained image sheet can be as large as a postcard.
Moreover, it is preferable that Tg (glass transition temperature) of the adhesive used for the adhesive layer constituting the opaque sheet is −35 ° C. or less (for example, less than −35 ° C., for example, about −40 ° C. to − (100) ° C. More preferably, it is about −40 ° C. to − (100) ° C.). The glass transition temperature is determined from a curve (DSC) of a transition portion observed at the time of temperature rise measured according to JIS K7121 (1987 established, 1999 edition), and each baseline in the DSC curve and the glass transition It can be measured as the temperature of the intersection with the temperature curve. Specifically, it can measure using a DSC measuring apparatus etc., for example. There is no restriction | limiting in particular as such a DSC measuring apparatus, According to the objective, it can select suitably from well-known things, for example, SII company make differential thermal layer scanning calorimeter 6200 etc. are mentioned. In the DSC measuring apparatus, the amount of the sample is generally about 5 mg, the standard substance is aluminum oxide or the like, and the temperature rising rate is about 15 ° C./min.

Moreover, as an adhesion layer, it is preferable that the application quantity has 15 g / m < ² > or more, for example (for example, 20 g / m < ² > or more). However, since the coating amount is preferably thinner than the base material of the opaque sheet S2 when integrated as an image sheet, the basis weight (120g / to m about ²⁾ is the upper limit value.
In particular, in the present invention, it is preferable that Tg (glass transition temperature) of the pressure-sensitive adhesive to be used is −50 ° C. or less and the coating amount is 20 g / m ² or more.
As described above, when the opaque sheet S2 is brought into contact with the transparent sheet S1, the non-transparent sheet S2 is brought into contact with the maximum angle so that the sticking can be performed with reduced impact, and more opaque than the conveying speed V1 of the transparent sheet S1. The conveyance speed V2 of the sheet S2 is configured to be small.
Further, the tip shape of the narrow side edge portion of the separation plate 34 is such that the tip of the separation sheet S3 can be smoothly folded and the curvature of the opaque sheet S2 can be separated from the release sheet S3. A curvature portion 342 having a constant curvature is formed.
The pressure roller pair 4 is disposed in the sheet conveyance path connecting the second roller pair 22 and the third roller pair 23 when the conveyance speed V1 of the transparent sheet S1 and the conveyance speed V2 of the opaque sheet S2 are constant. It consists of a pair of rollers that can be pivoted to a required position slightly downstream in the conveying direction from the position where the two intersect, and the bonded transparent sheet S1 and opaque sheet S2 are inserted and further pressed to make it stronger. It comes to stick.

The adhering apparatus (post-processing apparatus) A according to the first embodiment configured as described above is detachably connected to the image forming apparatus B and performs the following series of operations.
First, using the operation panel of the image forming apparatus B or the like, for example, an output mode using the sheet material sticking apparatus A is selected, and formation of the mirror image P on the transparent sheet S1 is started. At this time, the image forming source is digital information such as an image captured from a scanner device provided on the top of the image forming apparatus B or an electronic image transmitted from an electronic device such as a personal computer or a digital camera. Can be used. The means for supplying the transparent sheet S1 to the image forming apparatus B is not particularly limited, such as supply from a paper tray provided in the apparatus or supply by so-called manual insertion.
Then, using a known electrophotographic process, the toner image (mirror image) formed with the small particle size polymerized toner is transferred to the transparent sheet S1, fixed, and discharged from the external device connecting paper discharge portion b22. At this time, the transparent sheet S1 passing through the fixing unit b7 in the image forming apparatus B and going to the external apparatus connecting paper discharge unit b22 has an image surface on which the mirror image P is recorded facing downward, and the transparent sheet S1 facing downward is transparent. The sheet S1 passes through the external apparatus connecting paper discharge section b22 and enters the sticking apparatus A from the recording paper receiving port 1a.

The transport unit 2 in the sticking apparatus A that has received the transparent sheet S1 transports the transparent sheet S1 downward at a constant speed. At this time, the sticking apparatus A detects that the transparent sheet has entered by a sensor in the sticking apparatus A (preferably provided on the downstream side in the transport direction of the recording paper receiving port (immediately after the recording paper receiving port)). The take-up shaft 31 rotates at a predetermined timing, the sheet is fed out from the original set on the original support shaft 32, and the opaque sheet S2 is peeled off from the release paper S3 by the separation plate 34. The sheet is fed obliquely at a required speed V2 that is slower than the conveying speed V1 of the transparent sheet S1 so as to overlap the sheet S1.
As described above, the opaque sheet S2 that has started to be transported is required to have its leading end determined by the layout of the transport unit 2 and the feeding unit 3, as shown in FIGS. Of the transparent sheet S1 at a contact angle θ0 (preferably the maximum contact angle). At this time, since the conveyance speed V2 of the opaque sheet S2 is smaller than the conveyance speed V1 of the transparent sheet S1 as described above, a force (longitudinal direction) dragged by the transparent sheet S1 acts on the opaque sheet S2 and the opaque sheet S2 The vibration in the lateral direction is immediately attenuated by the adhesive force of the adhesive layer of the sheet, and then sticks to the transparent sheet S1. The traveling wave in the lateral direction is stuck so that the opaque sheet S2 can be stretched on the transparent sheet S1 by the resultant force in the oblique direction by the wave acting in the lateral direction and the dragged force. Be started.

When sticking is started, the sticking angle gradually changes from θ0 to a small angle. This angle is close to the angle formed between the transparent sheet S1 and the extending direction of the contact portion of the separation plate 34, and thereafter, the bonding of the two sheets is performed at a substantially constant angle θ1 from the start to the end of the bonding. Sticks both firmly (see FIG. 4 (e)).
Then, when the rear end of the transparent sheet S1 and the rear end of the opaque sheet S2 pass through the third roller pair 23 and the attachment of both is completed, the feeding operation of the feeding unit 3 is stopped, and the inside of the housing 1 The paper is discharged as an image recording sheet to an in-body discharge section provided at the bottom. When the paper discharge is completed, the transport operation of the transport unit 2 is stopped and waits until the next sticking operation is started. With the above, a series of operation | movement of the sticking apparatus A which concerns on Embodiment 1 is completed.

As described above, in the first embodiment, when the transparent sheet S1 and the opaque sheet S2 are encountered, the conveyance speed V2 of the opaque sheet S2 is made smaller than the conveyance speed V1 of the transparent sheet S1, and the adhesion is started from the start of the adhesion. Until the end, gradually decreases from the maximum angle of the sticking angle θ0. Once the sticking is started, the angle gradually decreases, and is preferably kept constant at the minimum angle (θ1) until the sticking is completed, thereby sticking while suppressing the entry of bubbles.
In this way, the contact angle intersects at the maximum contact angle θ0 at the time of contact, and the contact angle gradually decreases until or just before the insertion of the pressure roller 4 at which the transparent sheet S1 and the opaque sheet have the same speed. Since the minimum contact angle θ1 is substantially constant, it is possible to secure sticking that suppresses impact when the two are in contact with each other, and the obtained image sheet has no air mixing and is very close to a photographic image. A sheet is obtained.
If the image sheet is affixed in a state where the horizontal vibration due to vibrations generated when the opaque sheet S2 is peeled off and the vertical vibration are not attenuated, the opaque sheet should be made of a flexible material. Even if it is, it will be curled roundly in the horizontal direction or wrinkled in the vertical direction, resulting in poor value as a product.

Further, as shown in FIG. 7, the bubbles C are easily taken in due to irregularities on the image forming surface of the transparent sheet S1 and the surface of the adhesive layer S2a of the opaque sheet S2, slight shaking of the sheet, vibration of the sheet material, and the like.
If even minute bubbles C are taken in, the bubbles C are irregularly reflected as shown in FIG. 8, which is extremely inconvenient for an image recording sheet.
On the other hand, for example, in the case of a pasting angle exceeding 30 degrees and within 90 degrees, it is extremely difficult to stick to suppress impacts other than vibrations, but if already pasted, the intake of bubbles is greatly reduced. It has been found that In the first embodiment, the contact angle is gradually increased in the step of bonding the transparent sheet S1 and the opaque sheet S2 by setting the conveyance speed V2 of the opaque sheet S2 smaller than the conveyance speed V1 of the transparent sheet S1. Make it smaller. Further, as described above, when the transparent sheet S1 and the opaque sheet S2 encounter each other, they are brought into contact with each other at the maximum angle to attenuate the vibration, and then the sticking is performed. For this reason, as shown in FIG. 9 (a), at the leading ends of both sheets, a force acting like reaching the opaque sheet S2 acts to prevent the mixing of bubbles (the opaque sheet S2 in FIG. 9 (a)). (Refer to the arrow in the two directions shown at the tip.) After that, the contact angle is gradually reduced, and after the nip is stably put into the nip, the minimum angle is maintained until the end of the sticking. An image sheet having a photographic image with less air contamination is obtained.

In addition, although the transparent sheet S1 illustrated in this Embodiment 1 has the transparent whole area | region as shown to Fig.11 (a), as shown to FIG.11 (b)-(d). A transparent sheet partially opaque (for example, white) may be used. Further, in FIG. 11, a region indicated by parallel diagonal lines is an opaque portion, and the other portion is a transparent region.
As described above, the sticking apparatus A according to the first embodiment forms the mirror image P on the transparent sheet S1, and gives the speed difference between the transport speeds of the transparent sheet S1 and the opaque sheet S2 to the sticking angle. The transparent sheet S1 and the opaque sheet S2 are pasted together so that the mirror image P is sandwiched while gradually decreasing. In this way, as shown in FIG. 10, it is possible to obtain a photographic image recording sheet having a normal appearance and no irregular reflection due to bubbles. In particular, by forming the toner image with a small particle size polymerized toner, the height difference due to the portion of the toner image is reduced, air bubbles between the transparent sheet S1 and the opaque sheet S2 are hardly generated, and the image itself The quality of the image can be improved and higher image quality can be obtained.

[Embodiment 2]
The adhering apparatus A according to Embodiment 2 is characterized in that a means for changing the adhering angle between the first sheet material and the second sheet material is provided in the preceding stage of the adhering roller 4.
More specifically, as shown in FIG. 12, an opaque sheet guide roller 35 is provided as a means for changing the sticking angle between the first sheet material and the second sheet material before the pressure roller. And
By providing the opaque sheet guide roller 35 as means for changing the sticking angle of the opaque sheet S2, which is the second sheet material, the sticking angle after the sticking between the transparent sheet S1 and the opaque sheet is started. However, by operating the opaque sheet guide roller 35, the entrance angle of the opaque sheet S2 with respect to the transparent sheet S1 can be adjusted. Therefore, when an image sheet is created integrally by sticking, the size of the image sheet changes. In the pasting apparatus according to the second embodiment, a glossy image similar to a photographic image can be obtained.

The sticking apparatus according to the second embodiment operates as follows, similarly to the sticking apparatus A according to the first embodiment.
The input to the sticking apparatus A for the transparent sheet S1 as the first sheet is confirmed by the sensor from the state in which the opaque sheet S2 as the second sheet is wound on the original fabric, and the take-up shaft 31 at a predetermined timing. Is rotated, the sheet is fed out from the original set on the original support shaft 32, the opaque sheet S2 is peeled off from the release paper S3 by the separation plate 34, and the transparent sheet S1 is overlapped with the transparent sheet S1 being conveyed. The sheet S1 is fed obliquely at a required speed V2 that is slower than the conveyance speed V1.
As in the first embodiment, after encountering the transparent sheet S1, the sticking is started and the contact angle (sticking angle) with the transparent sheet S1 is gradually reduced, and the leading ends of the transparent sheet S1 and the opaque sheet S2 It reaches the pressure roller 4 in a state where the part is adhered. In the sticking apparatus A according to the present embodiment, the sticking angle between the transparent sheet S1 and the opaque sheet S2 is set to the opaque sheet guide roller in the sticking body of the transparent sheet S1 and the opaque sheet S2 reaching the pressure roller. 35, the adhering apparatus A with less air mixing, or less bending and wrinkling is obtained. With such an adhering apparatus, an image sheet with less air mixing or less bending and wrinkling can be applied. The method of wearing can be carried out.

As mentioned above, although the sticking apparatus A which concerns on this Embodiment was demonstrated, embodiment mentioned above shows an example of suitable embodiment of this invention, and this invention is not limited to it. Various modifications can be made without departing from the scope of the invention.
Moreover, in this Embodiment, although the sticking apparatus A was illustrated, it was made to encounter at the maximum angle at the time of encounter with the conveyance speed of a 1st sheet material, and the conveyance speed of a 2nd sheet material, and a speed difference as mentioned above. The apparatus is not limited as long as a sticking method can be implemented in which the sticking angle is gradually adjusted and the sticking angle can be gradually adjusted. Even in this case, it is preferable to provide the speed difference exemplified in the above embodiment.
Alternatively, the sticking apparatus A may be built in the image forming apparatus.
In addition, as exemplified in the above-described embodiment, the second sheet material is brought into contact with the pressure roller 41 on the second sheet material (opaque sheet S2 in this embodiment) side. Alternatively, a method may be used in which an image recording sheet is obtained by feeding a material or sticking the image P between the first sheet material and the second sheet material. In the case of the method for obtaining this image recording sheet, as exemplified in the above embodiment, the mirror image P is formed on the transparent sheet S1 using the small particle size polymerized toner, for example, the white opaque sheet S2 and its It is preferable to stick the transparent sheet S1.

It is the schematic of the state which connected the image forming apparatus to the sticking apparatus which concerns on embodiment. It is the schematic of the sticking apparatus which concerns on Embodiment 1. FIG. (A) thru | or (d) is the figure which showed the state until an opaque sheet peels with release paper at the front-end | tip part of a separating plate from peeling start. (A) thru | or (e) is a figure which shows the state until just before encounter of the transparent sheet and opaque sheet after peeling of an opaque sheet. (A) is a figure which shows the conveyance timing of a transparent sheet and an opaque sheet, (b) is a figure which shows the conveyance timing of a transparent sheet and an opaque sheet in relation to the detection by a sensor. (A) And (b) is the longitudinal cross-sectional view which showed the relationship in the separation plate vicinity from peeling of an opaque sheet to just before completion | finish of sticking of a transparent sheet and an opaque sheet. It is the longitudinal cross-sectional view which showed the state by which an air bubble is taken in between a transparent sheet and an opaque sheet. It is a longitudinal cross-sectional view of a state where air bubbles are taken in between a transparent sheet and an opaque sheet. (A) (b) And (c) is the figure which showed the sticking state from the start of sticking with a transparent sheet and an opaque sheet until it enters into the nip of a sticking roller and the sticking angle becomes constant. It is a longitudinal cross-sectional view of a state where a transparent sheet and an opaque sheet are adhered. (A) thru | or (d) is the top view which showed the example of a variation of a transparent sheet. It is the schematic of the sticking apparatus which concerns on Embodiment 2. FIG.

Explanation of symbols

A sheet material sticking device, 1 housing, 1a recording paper receiving port, 2 transport unit, 21 first roller pair, 22 second roller pair, 23 third roller pair, 3 feeding unit, 31 take-up shaft, 32 original Anti-support shaft, 33 idle shaft, 34 separator plate, 341 contact portion, 342 curvature portion, 35 opaque sheet guide roller, 4 pressure roller pair, 41 pressure roller on opaque sheet side, S1 transparent sheet (first sheet material), S2 Opaque sheet (second sheet material), S2a adhesive layer, S3 release paper, P image, V1 transparent sheet conveyance speed, V2 opaque sheet conveyance speed, θ0 contact angle, θ1 sticking angle, B image forming apparatus, b1 housing Body, b2 paper discharge unit, b21 in-body paper discharge unit, b22 external device connection paper discharge unit, b3 paper feed unit, b4 recording paper transport path, b5 toner image forming unit, b6 transfer unit, b7 fixing unit , B8 reversing part, b9 manual insertion tray part, C bubble

Claims (17)

  With respect to the first sheet material conveyed at a constant speed, a second sheet material provided with an adhesive layer on one side is obliquely supplied at a required angle and is attached via the adhesive layer. The sticking apparatus, wherein the second sheet material is accelerated from a stopped state and is brought into contact with the first sheet material at a speed slower than that of the first sheet material. The first sheet material includes a transparent portion and an image forming surface composed of an image formed on the transparent portion,
The second sheet material comprises an opaque sheet, and includes a roll body that holds and feeds out the second sheet material in a state where the release paper is laminated on the adhesive layer.
Separating means for separating the curvature of the release paper from the second sheet material on the upstream side of the contact position with the first sheet material;
The sticking apparatus according to claim 1, wherein an adhesive layer surface of the second sheet material from which the release paper is separated by the separating unit is brought into contact with an image forming surface of the first sheet material.   The said separating means has a contact part, and the said 2nd sheet material let | drawn out from the said roll body is curvature-separated from the said release paper by bending in the said contact part. Sticking device. The sticking means is
A transport unit for transporting the first sheet material;
A feeding section that feeds the second sheet material obliquely toward the conveyance direction of the first sheet material so as to be capable of being attached to the first sheet material being conveyed by the conveyance unit;
When the second sheet material is completely attached to the first sheet material, the conveyance unit and the feeding unit are arranged so that the conveyance speed of the first sheet material and the conveyance speed of the second sheet material are equal. The adhering device according to claim 1, wherein the adhering device is configured.   A pair of turnable pressure-bonding rollers engaged with the second sheet material is provided, and the first sheet material and the second sheet material are received and pressure-bonded to a nip portion of the pair of pressure-bonding rollers. The sticking apparatus according to any one of claims 1 to 4.   The sticking apparatus according to claim 5, wherein means for changing a sticking angle between the first sheet material and the second sheet material is provided in front of the pressure roller.   The said feeding part is comprised so that the front-end | tip of the said 2nd sheet material paid out diagonally may be contact | abutted to the said press roller, and it may be bent to the said 1st sheet material side. The sticking device described.   The sticking apparatus according to claim 2, wherein the image is formed using a small particle size polymerized toner.   9. The apparatus according to claim 1, further comprising a sensor that detects that the first sheet material has been input, and starts transporting the second sheet material upon detection by the sensor. Sticking device.   A post-processing device comprising the sticking device according to any one of claims 1 to 9. 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 the sticking device having the sticking means for sticking the first sheet material and the second sheet material,
The image forming apparatus, wherein the sheet material sticking apparatus is the sticking apparatus according to any one of claims 1 to 9.   12. The image forming apparatus according to claim 11, wherein a small particle size polymerized toner is used as the toner. The first sheet material is conveyed at a constant speed, and the second sheet material having an adhesive layer on one side is fed out obliquely in the conveying direction of the first sheet material, and the first sheet material and the second sheet A sheet material sticking method for sticking a material,
The sheet material adhering method, wherein the conveying speed of the second sheet material is accelerated from a stopped state, and the second sheet is brought into contact with the first sheet at a slower speed than the first sheet material.   The sheet material adhering method according to claim 13, wherein at the start of adhering after the contact, the conveying speed of the first sheet material and the conveying speed of the second sheet material are made equal.   The second sheet material is fed out such that a tip of the second sheet material comes into contact with a nip portion of a pair of pressure rollers for receiving and pressure-bonding the first sheet material and the second sheet material. The sheet | seat material sticking method of Claim 13 or 14.   The sheet material sticking method according to claim 13, wherein the image is formed using a small particle size polymerized toner.   An image sheet obtained by using the sticking apparatus according to any one of claims 1 to 16.

Images