JPS5991470A - Heating device of moving sheet body - Google Patents

Abstract

PURPOSE:To heat effectively a moving sheet body such as transfer paper, etc. with no clogging by providing intermittently along a moving direction the area of the moving sheet body press-contacting to a heating body in the direction crossing the moving direction. CONSTITUTION:As for a press-contacting member 4, each of both ends of plural heat resistant tapes 5 extended in parallel along the moving direction 8 of transfer paper 14 is fixed to a tape supporting plate 6, and also each tape 5 is made to press-contact onto a hot plate 1 by a tape holder 7. Since each tape is placed in parallel, the press-contacting area of the tape to the paper 14 is intermittent in the vertical direction to the direction 8 of the paper 14. As a result, the contact area of the tape 5 to the paper 14 is reduced to prevent a paper clogging phenomenon due to friction between both of them and also move the paper 14 itself smoothly. When the tape 5 is formed by flexible heat resistant resin having a small coefficient of friction, it is deformed following well the shape of the surface of the hot plate 1 to sufficiently press-contact and heat the paper 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating device for a movable sheet body configured to heat the movable sheet body while bringing the movable sheet body into contact with a heating body.

Conventionally, in recording devices such as electrostatic recording and electrophotography, an electrostatic charge image is formed on an image carrier such as a photoreceptor drum, and this is developed with a developer mixed with toner and carrier as necessary. An image is formed based on a process in which the obtained toner image is electrostatically transferred onto a transfer sheet, for example, and further fixed.

However, when a toner image is electrostatically transferred onto a transfer sheet (recording sheet) using a transfer electrode such as a corona discharger, charge disturbance occurs and the resolution of the toner image is reduced. Furthermore, when a conductive magnetic toner, which has been recently recommended, is used as the toner, further charge disturbance occurs, resulting in a state in which transfer is virtually impossible.

As a method to improve the above-mentioned drawbacks of electrostatic transfer, attempts have been made to suppress transfer onto a transfer sheet using a pressure roll, etc., but the transfer efficiency is poor and only about half the amount of toner image is transferred. There is a disability.

Therefore, for example, Special Publication No. 46-41679 Publication No. 1, 4
'r Publication No. 48-22763, Japanese Unexamined Patent Publication No. 49-785
No. 59 and U.S. Patent No. 3. 993. No. 825, 1. The toner image is pressure-transferred to a belt-like intermediate transfer member having a rubber transfer layer between ll1 and the like, and the transferred toner image is heated to θl(
A method of press-transferring and fixing (transfer-fixing) onto a transfer sheet has been proposed. In such a method, a toner image is suppressed on the surface of a rubber-based transfer layer 1, such as silicone rubber or fluorine rubber, which has on the one hand a release property and on the other hand has a property of adhering ii; Q particles when suppressed. The toner image on the transfer layer is heated and melted by contact with a heating body such as a heating roll, and at the same time, the toner image is pressed and transferred onto a fed transfer sheet and fixed. That is,
The toner image resistant to melting due to heating has the above-mentioned frI of the transfer layer.
Because it is easily transferred and fixed onto the transfer sheet based on its f-type property, there is no reduction in resolution of the toner image due to the transfer process.
Schiff claims that it can achieve high transfer rates.

In such a recording apparatus, it is desirable to pre-heat the transfer paper before transferring and fixing in order to improve transfer and fixing properties. For this purpose, a hot plate may be brought into contact with the transfer paper sent to the transfer fixing section. For example, this hot plate may be placed on the circumferential surface of the pressure roll that is pressed against the heating roll while sandwiching the transfer paper, or it may be placed in front of the kingdom roll so that the transfer paper can be pressed against it. .

However, in such preheating, for example, +1
The paper is equivalent to 1 for the pressing member that presses the paper.
Since the transfer paper is conveyed while being in contact with iri J'+'t, the friction between the two is large, and it has been found that this tends to cause paper jams in the transfer paper.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mounting unit that can effectively heat a moving sheet such as transfer paper without clogging the moving sheet.

According to the invention, in the heating device mentioned at the beginning, this object is achieved by providing a kingdom member for pressing the moving sheet body onto the heating body (for example a hot plate or a hot roll) along the direction of movement of the moving sheet body. (particularly a contact member having a plurality of heat-resistant tapes arranged in parallel), and the pressure contact area of the moving sheet body by this pressure contact portion is in the direction ( This is achieved by a heating device for a moving sheet body, which is characterized in that it is intermittently present (in particular in substantially orthogonal directions).

According to the heating device of the present invention, the pressing area of the moving sheet body that appears as a heating body is provided intermittently along the moving direction of the moving sheet body and at the same time in a direction crossing the moving direction. The member does not come into contact with more than j, ,%, and is smoothly conveyed while being heated by the heating element to +lI.

Therefore, the sheet body is heated to a desired temperature without causing any clogging, and is smoothly sent to a predetermined location (for example, a transfer/fixing section such as (Small II: 71SL)).

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

In Figures 1 and 2, the heating plate 1 is used and the power is 0? ■Cap R-
This is an example.

The hot plate 1 is heated by the heater 2 to a humidity sufficient to prepare the transfer paper 14. A contact 7'1 (4
-44 are arranged as shown. That is, the pressing member 4 is moved in the moving direction 8 of the transfer paper 14? 1-1 is 3 in parallel
Both ends of the plurality of heat-resistant tapes 5 are fixed to a tape support plate 6, and each tape 5 is formed into a 41V shape so that it is pressed onto the hot plate 1 by a tape presser 7.

What should be noted here is that since each tape 5 is arranged in parallel, the ridges or pressure contact areas between the tape and the transfer paper J4 are intermittently in a direction substantially orthogonal to the moving direction 8 of the transfer paper 14. It is that it exists. As a result, since the contact area between the tape 5 and the transfer paper 14 is reduced, it is possible to effectively prevent paper jams caused by friction between the two, and the transfer of the transfer paper 14 itself can be carried out in a staunch manner. I can do it.

For one general feeding of the transfer paper 14, there is a gap between each tape 5! It is preferable that a conveyance roller 9 is disposed in the gap at the center of the transfer paper 14, and the transfer paper 14 is conveyed while being pressed by the roller 9.

The heat exchanger tape 5 is preferably made of a flexible heat-resistant resin with a small coefficient of friction, such as a fluororesin such as Aphron, polyimide such as Kapton, polynisdel, or fiber-containing resin. When the tape is placed in the pressure-contact state shown in Fig. 2, it is deformed to closely follow the surface shape of the hot plate 1, and a pressure of 1λ ((and thus heating) of transfer 4+t; 1.4 is obtained.
can be made sufficient, and can be easily moved.

In order to heat the transfer paper more effectively, 1. knee 1,
As shown in FIG. 3, it is preferable to form the transfer paper 1) IIJ of the hot plate 1 into a convex curved surface. In this case, the hot plate 115
Since it is formed on a ζ curved surface, the pressure of the υ transfer paper 14 due to the sticking effect of the tape 50 on this curved surface 1)! - Condition? ,
13 is sufficient, and the heating is performed satisfactorily. Moreover, the tape presser 7 shown in FIG. 2 is not required.

FIG. 4 shows an example in which a heat roll 19 having a curved surface similar to that of the heat plate 1 of FIG. 3 is used. This convex roll 19 is heated to a temperature sufficient for heating the transfer paper by a heat source 19A such as a built-in heater lamp, and can also be used as a pressure roll of the transfer and fixing section described later, making the arrangement device more compact and transferring. This is useful in terms of improving paper transportability, etc. In this example as well, as in FIG. 3, the transfer paper 14 can be properly heated and, at the same time, the paper can be fed by the roll 19, so the above-mentioned IM roller 9 can be omitted.

In addition, in both the examples of FIGS. 3 and 4, 1 pressure contact member 4 pieces
As shown in FIGS. 1 and 2, a plurality of heat-reducing tapes 5 are fixed by a support plate 6.

Next, a preferred mode of use of the above pressure contact part 4 will be explained with reference to FIG.

The apparatus shown in FIG. 5 has an intermediate transfer belt 15.
1 is an apparatus 1'1 in which a known latent image forming mechanism 12, a developing device 13 and a cleaning machine are installed in a region along the outer peripheral surface of a toner iron holder 11 such as a rotating drum-type photoreceptor drum. (1 and 14 are provided sequentially in the rotational direction.) Currently [≦4] machine (C 13 and cleaning mechanism 14
In the transfer area A between the toner image carrier 11 and the toner image carrier 11, an intermediate transfer member 15 made of an endless belt is pressed against the outer circumferential surface of the toner image carrier 11 by a suppression (transfer) roll 16. The intermediate transfer belt 15 is a flexible film substrate made of polyimide or the like with a thickness of 10 to 100 μm and has an adhesive layer with a height of 10 to 100 μm.
For example, it is made of a silicone rubber layer coated with a thickness of μm. The intermediate transfer belt 15 includes a pressure roll 1
In addition to 6, the frame is passed between a heating roll 17 and a tension roller 18, and is moved at a constant speed in the same direction as the toner image carrier 11 in the transfer area A, and is directed to an intermediate transfer body heating area B in the heating roll 17. . Further, a cleaning roller 22 is disposed opposite to the tension roller 18, and a charge eliminating member 23 such as a charge eliminating brush for preventing charging of the belt 15 is provided at i+ and c.

At the transfer fixing section +i, QC at or near the detachment point of the intermediate transfer belt 15 on the heating roll 17, the pressure roll 1 is pressed against the roll 17.
9 is provided. Immediately before the transfer and fixing area C in the transfer path of the transfer plate 14 made of recording paper, which is set to pass through the transfer Uji area C, the transfer plate heating plate 1 and the pressure contact member 4 shown in -1- are located immediately before the transfer fixing area C. (However,
The roll 19 does not need to be heated with a heater. ).

Using an apparatus constructed as described above, in this example, the toner 1, which has been formed on the toner image carrier as described above, is finally transferred and fixed on the transfer sheet.

First, the toner image T on the toner image holding member 11 is formed by a latent image forming machine (a latent image formed by dirt 12).
It is formed by developing with. That is, when using electrophotography, the toner image carrier 11
is selenium-based, organic compound-based, zinc oxide or tr, 'I-
tuff, cadmium chloride binder type, other t
lS, 1≠ to the child side, composed of 6 light bodies, latent image formation t
=, +f'i 12, the entire outer circumferential surface of the toner matrix holder 11 is electrically charged, and an electrostatic latent image is formed by performing one-quadrant fog light on the rear side. The toner image carrier 11 is constituted by a dielectric material consisting of a conductive base and a dielectric surface layer, and the image signal is transmitted to a multi-star A.
A latent image is formed by converting it into an electrostatic latent image using a single laser electrode or an ion control electrode. In addition, when using the magnetic recording method, the toner image carrier 11 is made of a magnetic material, and image No. 48 is converted into a magnetic signal by the upper head to form a magnetic latent wave. Moyoi O The latent image formed in this way&J-1 is Fi'f
＋'tij.

If it is a latent image, the developing mechanism 13
The colored charge 11th charged to the opposite polarity to the charge forming Ij'(+) is converted into a υ visible group by the toner.
When the toner used here is a one-component jR electric magnetic toner, the current IS due to air and charges induced in the toner.
5' is done. -Component When using conductive magnetic toner and using the magnetic brush development method, the toner layer is formed as a medium-grain layer or a thin layer close to it. It is particularly preferable because it has excellent li developability and allows good transfer without selecting the transfer efficiency. If the latent image is a magnetic latent image, it is sufficient to develop it with magnetic toner, which prevents image bleeding during transfer and provides a clear image.
) can be done.

The toner image T formed on the toner image carrier 11 as described above is transferred onto the intermediate transfer belt 15 in the transfer area A by the pressing force of the suppression roller 16.

The adhesive layer of the intermediate transfer belt 15, especially the silicone rubber layer, has a moderate adhesiveness on the surface at low temperatures and rubber elasticity that contains the toner, so that the toner retention force of the toner image carrier 11 is reduced in the transfer area A. Uchi 1 Saki is intermediate 11ii:;
Toner can be sufficiently captured on the subject 11111. In addition, the surface energy of the silicone rubber layer is 3 [(
Since it is sufficiently smaller than the normal transfer material A'1, in the transfer fixing area C, which will be described later, the toner is removed from the surface of the toner transfer area. I'm so tired
When the transfer material is pressed into contact with the toner in a state where it has Ijj properties, the toner strongly adheres to the transfer material and becomes almost completely transferred and fixed onto the transfer material.

The addition 110-rule 17 has a heater 17A constituted by, for example, an infrared pure lamp or the like in a hollow metal roll made of aluminum or the like.
This metal roll has a built-in table! rll
f; iiH Control the moisture layer within an appropriate range. As a result, the intermediate transfer belt 15 and the toner (q The pressure roll 19 in the transfer/fixing area C is heated to make the transfer property (71"f) of the toner image sufficient in the area C. As the auxiliary heating roll (see C: 4441'; ?l, which is a heat-resistant elastic roll made of A4 and provided with a surface layer of silicone rubber or the like and has a built-in heater lamp 9A), may be used. In addition, the transfer material pressing member 4 in [1st part 1st part] is shown in Fig. 4;
The transfer plate 4. It is preferable that the surface of the intermediate transfer body 15 is heated in contact with the roll 19 until the toner threshold on the intermediate transfer body 15 is sufficiently transferred and fixed in the transfer fixing area C. ξThe friction coefficient of the surface of the pressure roll 19 is larger than that of the tape 5 of the pressure contact part 4, and as the surface moves due to the rotation of the pressure roll 190,
While the transfer material slides on the surface of the tape 5, it is heated by the roll 19 and conveyed to the transfer fixing area C. In the thus heated transfer and transfer/fixing area C, the intermediate transfer belt 15, which has been heated in advance with the toner image by the heat roll 17, is sandwiched and pressed by the pressure roll 19,
As a result, the toner of the toner image is brought into pressure contact with the toner in a fluidized state due to heating, so that it is actually transferred and fixed onto the transfer layer.

The transfer material with transfer layer>nl*:' and C, 1j-17, is conveyed along the intermediate transfer belt 15 and separated from the intermediate transfer belt 15 by the tension roller 18.

Here, if the diameter of the tension roller 18 is made small, the diameter of the transfer layer can be reduced by 1'jlli compared to the intermediate transfer belt 15.
This can be done easily, but it is also possible to prevent the intermediate transfer belt 15 from shifting by further swinging it. The intermediate transfer belt 15 that has passed through the transfer and fixing area C is partially cooled naturally, undergoes transfer again in the transfer area A, and then repeats the transfer and fixing process in the transfer and fixing area C.

In the figure, reference numeral 21 denotes a cleaning roller, which removes toner when it adheres to the pressure roll 19.

In the example shown in FIG. 5, since the intermediate transfer belt 15, the toner, and the transfer material are heated together, it is possible to reduce the necessary heating temperature for each of them. It is not necessary to heat the product to 11 (I:!s) It is possible to suppress the bending to a small extent and significantly improve the overall energy consumption rate, and in addition, the total energy consumption is reduced. In addition, it is possible to transfer and fix the toner image at high speed.Since the intermediate transfer bell is not heated excessively, the toner image retention f''・11 is )'C1 Conductive photoreceptor, such as its basic %l'l ffN #l
Even if the intermediate transfer belt 150 has similar properties, it does not interfere with its good properties, or prevents disadvantages such as a part of the particles of the intermediate transfer belt 150 adhering to the toner (f47 holder 11). In addition, the intermediate transfer belt 15 is not heated to high temperatures or exposed to severe temperature changes, so that its durability can be maintained for a long period of time, or the material of the intermediate transfer belt 15 can be The heat resistance conditions required for the toner are relaxed, the selection range of materials is expanded, and costs can be reduced.In addition, the toner is not heated too much, and the toner flow rate is reduced.
I) Image blurring or offset phenomenon due to excessive image density does not occur. In addition, the transfer layer is not excessively embossed, the transfer material does not suffer from heat deformation or wrinkles, and of course, there is virtually no risk of fire.

FIG. 6 shows a recording apparatus in which the intermediate transfer body is of a roll type, and parts common to those in the above-described example are given common reference numerals and explanations are omitted.

In I'11, the pressure roll 19 is pressed from below against the intermediate transfer roll 25, which has an adhesive layer such as silicone rubber as a transfer layer on a metal roll base.
Both rolls 25.19 are equipped with a heater 25A as described above,
Each has a built-in 19A.

A method using such an intermediate transfer roll has the advantage that the structure is much simpler than the intermediate transfer belt method, and the temperature of the roll can be easily controlled.

In the same manner as described above, INR heat tape 5 is pressed against the circumferential surface of the pressure roll 19 along the transfer paper feeding direction in front of the transfer fixing area C, and the heat of the roll 19 causes the transfer paper 14 to be pressed. It is preheated for 1-1η. Both ends of the tape 5 are fixed and held by a support rod 26.

FIG. 8 shows a modification of FIG. 4.
The heat-resistant tape 5 that presses the transfer paper 14 against the roll 1
The racks are endlessly passed by rollers 29 which are driven by (or fixed to) rollers 9. If the tape 5 is circulated endlessly in this way, it is convenient because paper feeding can be carried out more smoothly.

FIG. 9 shows a pressure contact part 34 which, unlike the above-mentioned sides, has a protrusion 35 that intermittently contacts the transfer paper 14 instead of using lNi, l heat tape. . The pressure contact portion 34 is preferably made of a flexible heating film that can be deformed following the circumferential surface of the roll 19, and is preferably made of a flexible heating film that can be deformed following the circumferential surface of the roll 19. Noma 1':! , to eliminate paper jams, and to heat the paper sufficiently.

In the following, the present invention has been illustrated, but the above-mentioned practical examples can be further modified based on the technical idea of the present invention.

1211 For example, the above-described arrangement pattern of the heat-resistant tape or pressure-welding area may be changed at will. The present invention is of course applicable to other devices than the above-described recording device 1''''4.

[Brief explanation of the drawing]

1','(li ii+i &j Fig. 1 is a plan view of a transfer paper heating device; 2) Fig. N is a sectional view taken along the line A-A in Fig. 1; , Figures 3 and 4 are sectional views of the transfer paper heating device from the other two sides, 8i45 j Figure 1 is a schematic diagram of the recording device, ff, Figure 6 ζ
- A schematic diagram of the main parts of another recording device, Figure 7: Immediately; 6
ls: <l left side view, P+1: 81 yen 11 Figure 9 shows the addition of transfer paper from the other two sides to the rainbow ・1 (each sectional view of the device i/i. In the code, ■...
・・・・・・・・・・・・Hot plate 4.34・・・・・・
・・・・・・Pressure member 5・・・・・・・・・・・・・・・
・・・・・・Heat-resistant tape 7・・・・・・・・・・・・・・・
・Tape foot 9・・・・・・・・・・・・・・・・・・
・Conveyance roller 11・・・・・・・・・・・・・・・
・・Broken, light drum 13・・・・・・・・・・・・・・
・Developing section 14・・・・・・・・・・・・・・・・・・
Transfer paper 15......Intermediate transfer belt 17...-Heating roll 17 A, 19 A, 25 A...
・Peter 19・・・・・・・・・・・・・・・ Pressure roll 25・・・・・・・・・・・・Intermediate transfer roll 35・・・・・・・・・・・・・・・・・・・・・Protrusion part A・・・・・・・・・・・・Press transfer area B ・
・・・・・・・・・・・・・・・Intermediate transfer body heating area C・・・・・・・・・・・・・・・・・・Transfer fixing area T
・・・・・・・・・・・・・・・・・・・・・It is a toner image. Agent Patent Attorney: Hiroshi Saka (itl,!?=
) 5th day 40th @5th @1 DoO No. 70 No. 80

Claims (1)

[Scope of Claims] 1. In a heating device for a movable sheet body having a groove bottom so that a movable sheet body is brought into contact with a heating body and heated by force, the movable sheet body is heated along a moving direction of the movable sheet body. It has a pressure contact part that is brought into pressure contact with the heating body, and a pressure contact area of the movable sheet body by the pressure contact part side exists intermittently in a direction intersecting the moving direction of the movable sheet body. A heating device for a moving sheet body. 2 The pressure contact member is provided with a plurality of heat-resistant tapes having a length of tt(e) parallel to the moving direction of the moving sheet body (7, '
1. The equipment described in item 1 of the scope of requirements. 3 In the gap between multiple heat-resistant tapes, v! ,I? II. A conveyor roller according to claim 2, wherein a conveyance roller is arranged to convey the sheet body while pressing it onto the heating body.
Bii. 4. The device described in any one of items 1 to 3 of the patent application, wherein the heating body is a hot plate. 5. The device according to claim 4, wherein the surface of the hot plate on the moving sheet body side is formed into a convex curved surface. 6. 'LIrjfF' where the heating body consists of a heat roll
Any one of the first to third terms in the range of t'tf'l
A device with 1iQ in t city. 7. Set the heat roll to convey the moving sheet body.
An apparatus as claimed in claim 6, wherein the apparatus is constructed by: 8. In a recording device having an intermediate transfer member used for transferring a toner image on an image carrier and transferring and fixing the transferred toner image to a transfer paper, a heat roll has a heat source, and the intermediate transfer member [Apparatus according to any one of claims 1 to 7.