Dry unit of wet electrophotographic printing machine

专利摘要:
The dry unit of the disclosed wet electrophotographic printing apparatus includes: a first bracket movably installed on the main frame so that the dry roller is detachable from the photosensitive belt; A second bracket on which a heating roller is mounted and movably installed on the main frame such that the heating roller is detachable from the dry roller; A first elastic member providing an elastic force in a direction in which the dry roller is in close contact with the photosensitive belt or vice versa; A second elastic member providing an elastic force in a direction in which the dry roller and the heating roller are in close contact with each other or in a direction opposite thereto; It is rotatably installed on the main frame, the outer peripheral surface is in close contact with the one side of the first bracket to form a cam surface for interlocking the first bracket in the direction opposite to the elastic force of the first elastic member, and to interlock the second bracket inside A cam member having a cam groove formed therein; One end is slidably inserted into the cam groove and the other end is in close contact with the second bracket, the interlocking lever for interlocking the second bracket in a direction opposite to the elastic force of the second elastic member while being rotated in accordance with the rotation of the cam member; And drive means for selectively rotating the cam member and the dry roller, respectively. According to such a structure, it can respond suitably to a printing mode, a printing standby mode, and a stop mode, changing the attachment / detachment position of a dry roller and a heating roller.
公开号:KR19990081783A
申请号:KR1019980049215
申请日:1998-11-16
公开日:1999-11-15
发明作者:강동환
申请人:윤종용；삼성전자 주식회사；
IPC主号:

专利说明:

Dry unit of wet electrophotographic printing machine
The present invention relates to a dry unit for drying and removing a liquid solvent remaining on a photosensitive belt in a wet electrophotographic printer.
In a wet electrophotographic printer such as a color laser printer, for example, as shown in FIG. 1, a developing unit 20 for developing a predetermined image on the photosensitive belt 10 using a liquid solvent and a powdered toner, and developing Thereafter, a dry unit 30 for drying and removing the liquid solvent remaining in the photosensitive belt 10 and a printing unit 40 for printing an image developed on the photosensitive belt 10 on a paper S are provided. It is.
The dry unit 30 is a dry roller 31 for adsorbing the solvent while being in close contact with the photosensitive belt 10 and a heating roller for heating the dry roller 31 to evaporate the absorbed solvent. It comprises a 32. The solvent evaporated by the heating roller 32 is guided through a predetermined route, collected, and then recovered.
However, the photosensitive belt 10, the dry roller 31, and the heating roller 32 are driven while being in close contact with each other as shown in the drawing while the printing is in progress to perform the absorption and evaporation of the solvent, but the printing for a long time If not, the photosensitive belt 10, the dry roller 31 and the heating roller 32 need to be spaced apart from each other. Since the surface temperature of the heating roller 32 is about 90 ° C. during printing, the heating roller 32 receives heat only from the localized portion while the dry roller 31 is not rotated by the heating roller 32. To prevent it. In addition, in the printing standby state to start printing soon, the dry roller 31 needs to maintain its surface temperature at about 75 ° C. while being rotated in close contact with the heating roller 32 while being spaced apart from the photosensitive belt 10. There is. This is effective for reducing the time required for warming up by preheating the dry roller 31 to the predetermined temperature as described above before starting printing. At this time, since the dry roller 31 is not driven in contact with the photosensitive belt 10, it must be rotated by a separate driving means.
Therefore, there is a need for a dry unit capable of changing the detachable positions of the dry roller and the heating roller in accordance with the print mode, the print standby mode, and the stop mode.
The present invention has been made in view of the above, and an object thereof is to provide a dry unit which can cope with a print mode, a print standby mode and a stop mode while changing a detachable position of the dry roller and the heating roller.
1 is a view schematically showing the structure of a general wet electrophotographic printing apparatus;
2 is a view showing a dry unit of a wet electrophotographic printing apparatus according to a first embodiment of the present invention;
3 is a view seen from the III-III direction of FIG.
4 and 5 are diagrams for explaining the operation of each mode of the dry unit shown in FIG.
6 is a view showing an extract of the cam member employed in the dry unit shown in FIG.
7 is a view schematically showing a power connection structure in the dry unit shown in FIG.
8 is a view showing a dry unit of a wet electrophotographic printing apparatus according to a second embodiment of the present invention;
9 to 11 are diagrams for explaining the operation of each mode of the dry unit shown in FIG.
<Description of Symbols for Major Parts of Drawings>
100 ... Mainframe 200,200 '... 1st Bracket
210,210 '... Dry Roller 300,300' ... Second Bracket
310,310 '... heating roller 400,410' ... cam member
420,420 '... Camhome 500,500' ... Interlocking lever
610,620 Relay gear 700 Drive motor
In order to achieve the above object, a dry unit of a wet electrophotographic printing apparatus according to the present invention includes a dry roller for absorbing a liquid solvent remaining on a photosensitive belt; A first bracket to which the dry roller is mounted and movably installed on the main frame such that the dry roller is detachable from the photosensitive belt; A heating roller for heating the dry roller; A second bracket on which the heating roller is mounted and movably installed on the main frame such that the heating roller is detachable from the dry roller; A first elastic member providing elastic force to the first bracket in a direction in which the dry roller is in close contact with the photosensitive belt; A second elastic member providing an elastic force to the second bracket in a direction in which the dry roller and the heating roller are in close contact with each other; It is rotatably installed on the main frame, the outer peripheral surface is in close contact with the one side of the first bracket to form a cam surface for interlocking the first bracket in a direction opposite to the elastic force of the first elastic member, the inside A cam member having a cam groove for interlocking two brackets; It is rotatably installed in the first bracket, one end is slidably inserted into the cam groove and the other end is in close contact with the second bracket, and rotated in accordance with the rotation of the cam member in the opposite direction to the elastic force of the second elastic member An interlocking lever interlocking the second bracket; And driving means for selectively rotating the cam member and the dry roller, respectively.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
2 to 7 show a dry unit according to a first embodiment of the present invention.
First, as shown in FIGS. 2 and 3, the first bracket 200 supporting the dry roller 210 and the second bracket supporting the heating roller 310 are attached to the main frame 100 provided in the printing apparatus. 300 are respectively installed to be movable. The first bracket 200 receives elastic force in a direction in which the dry roller 210 is in close contact with the photosensitive belt 10 by a first compression spring (hereinafter referred to as a first elastic member) 230. In addition, the second bracket 300 has a long hole 320 formed on one side thereof is slidably coupled to the shaft 110 provided in the main frame 100, and the heating roller 310 and the dry roller 210 The elastic force is received by the second compression spring (hereinafter referred to as the second elastic member) 330 in the close contact direction. Therefore, unless the other force is applied, the heating roller 310 is in close contact with the dry roller 210, the dry roller 210 maintains a state in close contact with the photosensitive belt (10). On the other hand, the main member 100, the cam member 400 is rotatably installed. The outer circumferential surface of the cam member 400 is a cam surface 410 having a predetermined cam curve, and is in close contact with the protrusion 220 provided on the first bracket 200, and according to the rotation of the cam member 400, the first bracket ( 200 is pushed in the direction opposite to the elastic force by the first elastic member 230. That is, the position of the first bracket 200 is adjusted by the elastic force of the first elastic member 230 and the cam movement between the cam surface 410 and the protrusion 220 according to the rotation of the cam member 400. Will be. In addition, a cam groove 420 having a predetermined cam curve is formed in the cam member 400, that is, the side surface thereof. The cam groove 420 is interlocked with the rotatable lever 500 installed in the first bracket 200. One end of is slidably inserted. The other end of the interlocking lever 500 is in close contact with the second bracket 300 so as to push the second bracket 300 in a direction opposite to the elastic force of the second elastic member 330. Accordingly, as the cam member 400 rotates, the interlock lever 500 rotates to push the second bracket 300 out of the second bracket 300 together with the elastic force of the second elastic member 330. The position will be adjusted.
As shown in FIG. 6, the cam member 400 moves the first and second brackets 200 and 300 to the three mode positions of the print mode, the print standby mode, and the stop mode, as shown in FIG. 6. It is configured to be adjustable. In addition, as shown in FIGS. 3 and 7, the relay gears 610 and 620 are connected to the driving motor 700 to rotate, and the electronic clutch 430 is rotated on the cam shaft 400. Is installed can selectively connect or disconnect the power from the drive motor 700. On the other hand, the power of the drive motor 700 is connected to be transmitted to the dry roller 210 through the relay gears (610, 620). This is a power connection structure for when the dry roller 210 is to be rotated in a state spaced apart from the photosensitive belt (10). And the one-way bearing 240 is installed on the rotary shaft of the dry roller 210, it is configured to transmit power only from the drive motor 700 to the dry roller 210 side.
In the above configuration, when the print job is started, the driving member 700 is driven after the electronic clutch 430 is turned on, thereby printing the cam member 400 as shown in FIG. 2. Rotate to mode. When the rotation of the cam member 400 is completed, the electronic clutch 430 (see FIG. 3) is turned off to stop power and stop the driving motor 700. As the cam member 400 rotates as described above, the first and second brackets 200 and 300 are respectively moved by the elastic force of the first and second elastic members 230 and 330, and the dry roller 210. ) Is in contact with the photosensitive belt 10, the heating roller 310 is in close contact with the dry roller 210, respectively. From this time, the dry roller 210 is driven and rotated by the photosensitive belt 10, and the rotational force is not reversely transmitted to the driving motor 700 because of the one-way bearing 240 (see FIG. 3).
Next, when the printing job is finished, the driving motor 700 is rotated while the electronic clutch 430 is turned on again. Accordingly, the cam member 400 is returned to the stop mode, as shown in FIG. Therefore, the cam surface 410 of the cam member 400 pushes the first bracket 200 to separate the dry roller 210 from the photosensitive belt 10. At the same time, the interlocking lever 500 pushes the second bracket 300 while rotating the cam groove 420 to separate the heating roller 310 from the dry roller 210. Therefore, at this time, the photosensitive belt 10 and the dry roller 210 and the heating roller 310 are all spaced apart.
In order to maintain the printing standby state while continuously supplying power, first, a predetermined temperature sensor (not shown) checks whether the surface temperature of the dry roller 210 is maintained at a set value, for example, 75 ° C ± 5%. . If the temperature falls below this range, the electronic clutch 430 (see FIG. 3) is turned on and the driving motor 700 is rotated. Accordingly, the cam member 400 is rotated in the print standby mode as shown in Figure 5, the heating roller 310 is in close contact with the dry roller 210. At this time, the dry roller 210 and the photosensitive belt 10 is still spaced apart. Subsequently, the electronic clutch 430 (see FIG. 3) is turned off, and the driving motor 700 continues to be driven instead. This is to continuously transmit the power of the driving motor 700 to the dry roller 210 to rotate the entire surface evenly. In this way, the heating roller 310 and the dry roller 210 in close contact with the heating while rotating, it is checked whether the surface temperature is raised to the above temperature range, that is, 75 ° C ± 5%. Thus, when the surface temperature rises to the desired temperature, the electronic clutch 430 (see FIG. 3) is turned on again to rotate the cam member 400 in the stop mode described above and stop the driving motor 700. This is to raise the dry roller 210 to a desired temperature and then prevent overheating of the dry roller 210 while waiting for a printing command. And when the waiting time is long and the surface temperature of the dry roller 210 is lowered again, the above steps are repeated again.
As such, the dry unit of the present invention can smoothly change the positions of the dry roller 210 and the heating roller 310 to be suitable for the print mode, the print standby mode and the stop mode.
8 to 11 show a dry unit according to a second embodiment of the present invention. The second embodiment has a structure in which the operation direction of the cam member and the first elastic member is configured in the opposite manner to the first embodiment described above, and the first bracket for supporting the dry roller is configured in a rotational manner.
Referring to FIG. 8, the first bracket 200 ′ supporting the dry roller 210 ′ and the second bracket 300 ′ supporting the heating roller 310 ′ are movable on the main frame (not shown). Is installed. The first bracket 200 ′ is rotatably installed in the direction of the arrow around the hinge shaft 101 ′ fixed to the main frame, and the first bent portion 201 ′ provided at one side thereof and the first bracket provided at the main frame. Receiving an elastic force so that the dry roller 210 'is rotated in a direction away from the photosensitive belt 10' by a tension spring (hereinafter referred to as a first elastic member) 230 'connecting the two bent portions (102') have.
In addition, the second bracket 300 'is provided with a slot 301' formed at one side thereof coupled to the protrusion 203 'provided at the first bracket 200' so as to be slidably supported, and a compression spring (hereinafter referred to as 2) the heating roller 310 'is subjected to an elastic force in a direction in which the heating roller 310' is in close contact with the dry roller 210 '. That is, the second elastic member 330 ′ is a third bent portion 202 ′ integrally connected to the first bracket 200 ′ and a sub bracket 320 ′ fixed to the second bracket 300 ′. It is installed between the heating roller 310 'is applied to the elasticity in the direction in close contact with the dry roller 210'. Therefore, the dry roller 210 'is in close contact with the heating roller 310' and is spaced apart from the photosensitive belt 10 'unless another force is applied.
On the other hand, the main member cam member 400 ′ is rotatably installed. The outer circumferential surface of the cam member 400 'is a cam surface 410' having a predetermined cam curve, and is in close contact with one surface of the first bent portion 201 'of the first bracket 200', thereby providing a cam member 400 '. According to the rotation of the first bracket 200 'is pushed in the direction opposite to the elastic force by the first elastic member 230', that is, the dry roller 210 'is in close contact with the photosensitive belt (10'). . That is, the first bracket is formed by the elastic force of the first elastic member 230 'and the cam movement between the cam surface 410' and the first bent portion 201 'according to the rotation of the cam member 400'. The position of 200 'is adjusted. In addition, a cam groove 420 'having a predetermined cam curve is formed in the cam member 400', that is, the side surface thereof, and the cam groove 420 'is rotatably installed in the first bracket 200'. One end 510 'of the lever 500' is slidably inserted. At the other end of the interlock lever 500 ', the roller is in close contact with the second bracket 300' such that the second bracket 300 'can be pushed in a direction opposite to the elastic force of the second elastic member 330'. A part 520 'is provided. Therefore, as the cam member 400 'is rotated, the interlocking lever 500' is rotated, and the roller portion 520 'pushes the second bracket 300' out, thereby allowing the second elastic member 330 'to be rotated. The position of the second bracket 300 'is adjusted with the elastic force of
9 to 11 show states of respective modes of the dry unit according to the second embodiment as in the first embodiment described above. 9 shows a state in which the dry roller 210 'is in close contact with the photosensitive belt 10' and the heating roller 310 'is in close contact with the dry roller 210' as in printing. 10 shows a state in which the dry roller 210 ', the heating roller 310' and the photosensitive belt 10 'are all spaced apart from each other at the end of printing, and FIG. 11 is a stand-by state in which the dry roller 210' is used to warm up. The photosensitive belt 10 'is spaced apart and is in close contact with the heating roller 310' is rotated. In addition, since the structure of selectively rotating the dry roller 210 'and the cam member 400' is the same as in the above-described first embodiment, description thereof will be omitted.
Therefore, by adopting such a configuration, it is possible to smoothly adjust the relative detachable position between the dry roller 210 ', the heating roller 310' and the photosensitive belt 10 'for each mode.
As described above, according to the dry unit of the wet electrophotographic printer according to the present invention, it is possible to appropriately cope with the print mode, the print standby mode and the stop mode while changing the detachable positions of the dry roller and the heating roller.
It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.

权利要求:
Claims (2)
[1" claim-type="Currently amended] A dry roller for absorbing the liquid solvent remaining on the photosensitive belt;
A first bracket to which the dry roller is mounted and movably installed on the main frame such that the dry roller is detachable from the photosensitive belt;
A heating roller for heating the dry roller;
A second bracket on which the heating roller is mounted and movably installed on the main frame such that the heating roller is detachable from the dry roller;
A first elastic member for providing an elastic force to the first bracket in any one of a direction in which the dry roller is in close contact with the photosensitive belt and a direction separated from the dry roller;
A second elastic member providing elastic force to the second bracket in any one of a direction in which the dry roller and the heating roller are in close contact with each other and a direction separated from each other;
It is rotatably installed on the main frame, the outer peripheral surface is in close contact with the one side of the first bracket to form a cam surface for interlocking the first bracket in a direction opposite to the elastic force of the first elastic member, the inside A cam member having a cam groove for interlocking two brackets;
It is rotatably installed in the first bracket, one end is slidably inserted into the cam groove and the other end is in close contact with the second bracket, and rotated in accordance with the rotation of the cam member in the opposite direction to the elastic force of the second elastic member An interlocking lever interlocking the second bracket;
And a driving means for selectively rotating the cam member and the dry roller, respectively.
[2" claim-type="Currently amended] The method of claim 1,
The drive means,
A drive motor generating power,
An electromagnetic clutch installed on the rotating shaft of the cam member so as to be connected to the driving motor, and selectively transmitting power of the driving motor to the cam member;
Wet electronics, characterized in that it is installed on the rotary shaft of the dry roller so as to be connected to the drive motor to transmit only the power from the drive motor to the dry roller, the one-way bearing does not transmit power in the opposite direction Dry unit for photographic printing machines.

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同族专利:

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公开号 | 公开日

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KR100322592B1|2002-05-09|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
1998-04-30|Priority to KR1019980015524

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1998-04-30|Priority to KR98-15524

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1998-04-30|Priority to KR19980015524

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1998-11-16|Application filed by 윤종용, 삼성전자 주식회사

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1999-11-15|Publication of KR19990081783A

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2002-05-09|Application granted

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2002-05-09|Publication of KR100322592B1

优先权:

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申请号 | 申请日 | 专利标题

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KR1019980015524|1998-04-30|

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KR98-15524|1998-04-30|

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KR19980015524|1998-04-30|