KR100343178B1 - Combining apparatus of backplate for dry unit of wet electrographic printer - Google Patents

Abstract

Disclosed is a back plate bonding apparatus for a dry unit of a wet electrophotographic printer.

The disclosed coupling device includes a dry unit frame movably mounted relative to the main frame; A back plate coupled to the dry unit frame to protect the mainframe and the dry unit from the outside; And coupling means for coupling the back plate to the main frame.

Description

Combining apparatus of backplate for dry unit of wet electrographic printer

The present invention relates to a dry unit of a wet electrophotographic printing press, and more particularly, to a wet electrophotographic method in which a coupling structure of a back plate for protecting a main unit having a driving roller and a dry unit frame having a dry roller from the outside is improved. The present invention relates to a back plate coupling device for a dry unit of a printing press.

In general, in a wet electrophotographic printing machine such as a color laser printer or a copying machine, as shown in FIG. 1, a developing unit 20 for developing a predetermined image on a photosensitive medium 10 made of an endless track, and developed photosensitive A dry unit 30 for drying the liquid solvent remaining on the medium 10 (hereinafter referred to as a "carrier"), and a transfer unit 40 for transferring the image developed on the photosensitive medium 10 to the paper S. Is provided.

The dry unit 30 has a dry roller 31 which absorbs carriers remaining in the photosensitive medium 10 while rotating in contact with the photosensitive medium 10, and heats the dry roller 31 to the dry roller 31. And a heating roller 32 for evaporating the absorbed carrier.

Here, the photosensitive medium 10, the dry roller 31, and the heating roller 32 are driven while being in close contact with each other as shown in the printing process to perform the absorption and evaporation of the carrier, but the printing is performed for a long time. If not, it is necessary to space the photosensitive medium 10, both the dry roller 31 and the heating roller 32 from each other. In the printing standby mode to start printing soon, the dry roller 31 is warmed up by preheating the dry roller 31 while being rotated in close contact with the heating roller 32 while being spaced apart from the photosensitive medium 10. There is a need to reduce the time required. Therefore, the dry unit 30 can be changed only when the dry roller 31 and the heating roller 32 are attached to or detached from each other in the print mode, the print standby mode, and the stop mode as described above.

On the other hand, the photosensitive medium 10 is driven by being wound around a plurality of rollers 14 and 16 including the driving roller 12, and the surface thereof is uniformly charged by the charger 18, and the laser scanning unit By 22, the surface is partially discharged in accordance with the desired print image to form an electrostatic latent image. The electrostatic latent image is developed by the developer injected from the developing unit 20 and finally transferred to the paper S via the transfer roller 42 of the transfer unit 40.

However, according to the related art, as described above, when the photosensitive medium 10 or the dry unit 30 repairs or replaces it, the dry roller 31 is moved from the driving roller 12 at regular intervals. In the stop mode, no repairs or replacements can be made at a given interval. In addition, since the dry unit 30 is composed of a single assembly, the above-described separation operation requires disassembling the entire components of the dry unit 30 to release the dry roller 31 from the driving roller 12 or the main frame. Therefore, the inconvenience of the worker follows. Therefore, in order to replace the photosensitive medium or to repair and replace the dry unit, a distance larger than that between the dry roller 31 and the photosensitive medium 10 maintained in the stop mode is required.

To this end, the present applicant installs a handle on the mainframe by manual and automatic through the Republic of Korea Patent Application No. 98-44191 and 98-44192, respectively, and the dry unit frame to the mainframe by the cam installed on the handle A device that can be spaced at regular intervals has been disclosed. In the printing press employing these devices and the printing press according to the prior art, a back plate for protecting the main frame and the dry unit frame from the outside and making the appearance of the printing machine look good is installed by a plurality of screws. However, this back plate has to be dismantled first from the frames for replacement and repair as described above, and when such disassembly is frequent, the screwing and disassembly of the screw is cumbersome.

The present invention was conceived in view of the above problems, the wet structure is improved so that the combination of the main frame and the dry unit frame from the outside and the back plate to the main frame to improve the appearance of the printing machine in one touch simple An object of the present invention is to provide a coupling device for a back plate for a dry unit of an electrophotographic printer.

1 is a configuration diagram schematically showing the main parts of a general wet electrophotographic printing press.

Figure 2 is a perspective view schematically showing the main portion of the back plate coupling device for a dry unit of a wet electrophotographic printer according to an embodiment of the present invention.

Figure 3 is a schematic cross-sectional view showing a state in which the coupling of the back plate and the main frame is released in the coupling device of FIG.

Figure 4 is a cross-sectional view schematically showing a state in which the back plate and the main frame in the coupling device of FIG.

Figure 5 is a perspective view schematically showing a state in which the back plate and the main frame is released in the coupling device of FIG.

<Description of the symbols for the main parts of the drawings>

112 Photosensitive medium 110 Main frame 114 Drive rollers

116 ... Dry Roller 118 ... Heat Roller 120 ... Dry Unit Frame

130 Backplate 141 Handle 142 Handle lever

144 Hinge shaft 146 Lever member 148 Coupling pin

150 ... Elastic piece 152 ... Elastic protrusion 156 ... Guide pin

158 ... Guide Ball

Dry unit back plate coupling device for a wet electrophotographic printing machine according to the present invention for achieving the above object, a dry unit frame installed movably with respect to the main frame; A back plate coupled to the dry unit frame to protect the main frame and the dry unit from the outside; And coupling means for coupling the back plate to the main frame.

Here, the coupling means: a coupling pin installed on the main frame; A hinge shaft rotatably installed on the back plate; A lever member installed at both ends of the hinge shaft and having a coupling groove pivotally coupled to the coupling pin; And a handle lever installed at an approximately center of the hinge shaft and installed to be rotatable with respect to the back plate to a handle lever mounting portion formed through the back plate and provided with a handle protrusion.

In addition, the coupling device according to the invention, the fixing means for fixing the handle lever to the back plate is further provided, the fixing means includes: elastic pieces provided on both sides of the handle lever; An elastic protrusion protruding from the elastic piece; And a fixing groove formed in the back plate so that the elastic protrusion is elastically coupled by the elastic deformation of the elastic piece when the handle lever is rotated and fixed to the back plate by the handle protrusion.

On the other hand, the coupling device according to the invention, when the back plate is coupled to the main frame by the coupling means, guide means for guiding the coupling position of the back plate to the main frame;

Here, the guide means: a guide pin installed on the back plate; And a guide hole formed in the main frame to guide the coupling position of the back plate while the guide pin slides when the back plate is coupled to the main frame.

Hereinafter, a back plate coupling device for a dry unit of a wet electrophotographic printer according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view schematically showing the main part of the back plate coupling device for a dry unit according to an embodiment of the present invention.

As shown in FIG. 2, the coupling device according to the present embodiment includes a main unit 110 corresponding to a printer main body, a dry unit frame 120 slidably coupled to the main frame 110, and The back plate 130 coupled to the dry unit frame 120, and the back plate coupling means 140 for coupling the back plate 130 and the main frame 110 is provided.

As shown in FIG. 3, the mainframe 110 corresponds to a printer main body, and a plurality of rollers (not shown) including a driving roller 114 on which the photosensitive medium 112 is wound around the caterpillar are installed. The rail assembly 122 is installed below the main frame 110 so that the main frame 110 may be extended by the folding of the rail assembly 122.

In addition, the dry unit frame 120 is equipped with a dry roller 116 and the heating roller 118, the dry unit frame 120 is slidably coupled to the main frame 110 by the rail assembly 122. . To this end, the sliding plate 124b is installed on the side of the main frame 110 so that the guide pin 124a installed in the dry unit frame 120 can be inserted and slid.

The dry unit frame 120 is provided with a spacer plate 126 and a close contact plate 128, respectively, and a cam shaft 129 rotatably installed between two plates 126 and 128 with a cam member 127 positioned thereon. Since the dry unit frame 120 is in close contact with and separated from the main frame 110 by being rotated by the two plates 126 and 128 while being rotated by), the dry roller 116 is connected to the driving roller 114. Can be tightly spaced / separated.

Here, the spacing of the dry unit frame 120 with respect to the main frame 110 is preferably about 12mm, it is determined that the close contact is about 3mm. Here, the dry unit frame 120 is in close contact with the main frame 110, that is, the 3mm corresponds to the print standby mode, in which the dry roller 116 is about 3mm with respect to the drive roller 114. Keeping the gap. Therefore, in order to switch from the printing standby mode to the printing mode, the dry roller 116 is rotated by a bracket (not shown) installed in the dry unit frame 120 by a separate driving means, and the photosensitive medium wound on the driving roller 114. Contact 112. On the other hand, the dry unit frame 120 is spaced from the main frame 110, that is, the 12mm is a so-called, repair mode in which the printer body does not operate, the printer does not operate because the power is turned off, but the photosensitive medium In order to replace the 112 or repair the dry unit, etc., the dry unit frame 120 is spaced apart from the main frame 110 at appropriate intervals. That is, the minimum interval for replacing the photosensitive medium 112 may be provided by the interval of about 12 mm.

In addition, the dry unit frame 120 is guided by the guide plate 123 formed on the main frame 110 is provided with a guide protrusion (125 in FIG. 2) to be in close contact / spaced with respect to the main frame 110. On the other hand, the dry roller 116 mounted on the dry unit frame 120 absorbs the carriers remaining on the photosensitive medium 112 while rotating in contact with the photosensitive medium 112, and is in close contact with the dry roller 116. The rotating heating roller 118 heats the dry roller 116 to evaporate the adsorbed carrier.

The back plate 130 is coupled to the dry unit frame 120, such as a dry roller 116 and a heating roller 118 installed in the dry unit or a driving roller 114 installed in the main frame 110 inside the printer. It acts as the side frame of the press to protect the various parts of the machine. In addition, when the dry unit frame 120 is slid relative to the main frame 110, it is coupled to move with the dry unit frame 120. In addition, the handle lever mounting portion is formed through the back plate 130 so that the handle lever 142 is rotatably installed on one side of the back plate 130.

The coupling means 140 is to fix the dry unit frame 120 to the main frame 110 by coupling the back plate 130 to the main frame 110, the hinge shaft 144, the handle projection 141 ) Is provided with a handle lever 142, a lever member 146, and a coupling pin 148 installed on the main frame 110.

The hinge shaft 144 is installed on the back plate 130 on the dry unit frame 120 side, and is rotatably installed on the back plate 130. The handle lever 142 is fixedly installed on the hinge shaft 144 to be located in the handle lever installation portion formed on the back plate 130. In addition, the lever member 146 is fixedly installed at both ends of the hinge shaft 144. Therefore, when the handle lever 142 is rotated, the hinge shaft 144 is rotated, and the lever member 146 at both ends is rotated by the rotation. Is rotated to be coupled to the coupling groove 147 formed in the lever member 146 to the coupling pin 148.

The handle protrusion 141 installed outside the handle lever 142 is for the user to hold the handle protrusion 141 to rotate the handle lever 142 about the hinge shaft 144.

In the coupling structure as described above, the coupling groove 147 is coupled to the coupling pin 148 and the handle lever 142 needs to be fixed to the back plate 130 at the same time. Therefore, in this embodiment, as the fixing means, the elastic piece 150 is provided on both sides of the handle lever 142, the elastic piece 150 protrudes to form the elastic projection 152, the handle lever 142 When the rotation is fixed to the back plate 130, the fixing groove 154 is formed in the back plate 130 so that the elastic projection 152 is elastically coupled by the elastic deformation of the elastic piece 150.

On the other hand, when the back plate 130 is coupled to the main frame 110, as a guide means for guiding the coupling position of the back plate 130 with respect to the main frame 110, a guide pin on one side of the back plate 130 When the back plate 130 is coupled to the main frame 110, the guide pin 156 slides to guide the coupling position of the back plate 130. Ball 158 is formed. Here, the guide pin 156 is preferably designed to have a tapered shape so as to be inserted into the guide hole 158 to act as a stopper.

The operation of the back plate coupling device for the dry unit of the wet electrophotographic printer according to the embodiment of the present invention having the above configuration will be described in detail with reference to FIGS. 2 to 5.

First, as shown in FIGS. 2 and 4, the handle lever 142 is positioned in line with the back plate 130, and the coupling groove formed in the lever member 146 by the back plate coupling means 140. 147 is coupled to the coupling pin 148 installed on the main frame 110. Accordingly, the coupling of the coupling groove 147 and the coupling pin 148 of the lever member 146 serves to fix the dry unit frame 120 to the main frame 110 by the back plate 130.

In this state, when the user grasps the handle protrusion 141 and pulls the handle lever 142 in the direction of arrow “A” of FIG. 4, the elastic protrusion coupled to the fixing groove (154 of FIG. 5) formed in the main frame 110. 152 is rotated in the arrow " B " direction of FIG. 4 while the coupling from the fixing groove 154 is released by the elastic deformation of the elastic piece 150. As shown in FIG. Then, the hinge shaft 144 installed on the handle lever 142 is rotated together. Therefore, the rotational force causes the lever member 146 to rotate, and the coupling groove 147 formed in the lever member 146 comes out of the coupling pin 148 to be in a state as shown in FIGS. 3 and 5. . In this state, the dry unit frame 120 may be disassembled from the main frame 110, and the operation of releasing the back plate 130 from the dry unit frame 120 may be performed.

On the other hand, after the back unit 130 is coupled to the dry unit frame 120 in the state of repairing the dry unit or the main body of the printer or replacing parts therein, the user may dry the frame in the direction of arrow "A" of FIG. After pushing the 120 and the back plate 130 to approach the lever member 146 toward the main frame 110 side, the handle lever 142 is rotated in the direction of arrow “B” of FIG. 3. The hinge shaft 144 is rotated together with 142, and the rotational force rotates the lever member 146. Then, the coupling groove 147 formed in the lever member 146 is inserted into the coupling pin 148 is inserted. In this state, the elastic piece 150 is plate-deformed, so that the elastic protrusion 152 is coupled to the fixing groove 154, and the guide pin 156 is guided by the guide hole 158, so that the back of the main frame 110 is back. Joining of the plate 130 is completed.

The back plate coupling device for a dry unit of a wet electrophotographic printer according to the present invention having the above configuration has the following effects.

In other words, when repairing or replacing parts of the printer main body such as the photosensitive medium or parts of the dry unit such as the dry roller and the heating roller, dismantling the back plate from the main body of the hinge shaft, lever member, handle lever Since it can be easily combined and disassembled by the operation of, it is possible to reduce the work maneuver than combining and disassembling by a plurality of screws.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Therefore, the true technical scope of the present invention should be defined by the following claims.

Claims (5)

A dry unit frame movably installed relative to the main frame; A back plate coupled to the dry unit frame to protect the main frame and the dry unit from the outside; And Coupling means for coupling the back plate to the main frame; The coupling means is: A coupling pin installed on the main frame; A hinge shaft rotatably installed on the back plate; A lever member installed at both ends of the hinge shaft and having a coupling groove pivotally coupled to the coupling pin; And Wet electrophotographic method is provided in the center of the hinge shaft, the handle lever mounting portion formed through the back plate to be rotatable with respect to the back plate, the handle lever is provided with a handle projection; Back plate coupling device for dry unit of printing press. The method of claim 1, Fixing means for fixing the handle lever to the back plate; Back plate coupling device for a dry unit of a wet electrophotographic printer, characterized in that further provided. The method of claim 2, wherein the fixing means: Elastic pieces provided on both sides of the handle lever; An elastic protrusion protruding from the elastic piece; And And a fixing groove formed in the back plate so that the elastic protrusion is elastically coupled by the elastic deformation of the elastic piece when the handle lever is rotated and fixed to the back plate by the handle protrusion. Backplate bonding device for dry unit of wet electrophotographic printer. The method of claim 1, And a guide means for guiding a coupling position of the back plate to the main frame when the back plate is coupled to the main frame by the coupling means. Back Plate Coupling Device. The method of claim 4, wherein the guide means: Guide pins installed on the back plate; And And a guide hole formed in the main frame to guide the coupling position of the back plate while sliding the guide pin when the back plate is coupled to the main frame. Backplate coupling device for the unit.