JPS63244085A - Image forming device - Google Patents

Abstract

PURPOSE:To reduce the size of a device without specifically requiring an operation lever for attaching and detaching a heat roller and press roller by providing a carrying handle for attaching and detaching a pair of the rollers freely turnably on a device body. CONSTITUTION:The carrying handle 36 is freely turnably provided on one side part in the device body. An operator holds a gripping part 38 of a handle 36 and turns the same in the direction of an arrow when paper P is jammed between the heat roller 31 and the press roller 32. A projecting part 39 pushes down one end part of a supporting lever 33 against the energizing force of a spring 35 when the handle 36 is turned. The lever 33 is then turned downward around a fulcrum shaft 34. The press roller 32 is thereby detached from the heat roller 31, by which the paper P can be removed. Since the handle 36 is used commonly as a lever for attaching and detaching the press roller, the number of parts is decreased and the size of the device body is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus that is applied, for example, as a small, lightweight, portable electronic copying machine.

(Prior Art) Generally, this type of electronic copying machine is provided with a handle on its main body for convenient carrying.

Further, a fixing device is provided in the fog concealing main body, and the image on the paper is fixed by the fixing device. As the fixing device, for example, one consisting of a heat roller and a press roller that comes into contact with and separates from the heat roller is used, and if paper gets jammed between the heat roller and the press roller during image fixing, the above-mentioned fixing device is used. The paper can be removed by separating the press roller from the heat roller.

(Problems to be Solved by the Invention) However, in the past, a special operating lever was required to bring the heat roller and the press roller into contact with each other, which increased the number of parts and increased the cost. Since the operating lever is provided inside the device body, there is a problem in that the device body becomes large.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an apparatus main body, a fixing device consisting of a pair of rollers provided in the apparatus main body, and a support mechanism that supports the pair of rollers so as to be able to move toward and away from each other; and a handle that is rotatably provided on the main body of the device and that operates the support mechanism to move the pair of rollers toward and away from each other. This is a characteristic feature.

(Function) With the above means, the handle for holding the press roller can also be used as a lever for approaching and separating the press roller.

(Example) The present invention will be described below with reference to an example shown in the drawings. FIG. 3 shows the external appearance of the electronic copying machine, and numeral 1 in the figure is the main body of the apparatus. A document table 2 is provided on the upper surface of the apparatus main body 1 so as to be movable in the direction of the arrow. Further, a control panel 3 is provided on the front side of the device main body 1.

This control panel 3 is provided with a copy button 4, a clear/stop key 5, a step up key 6, a step down key 7, a density down key 9, and a display section 10. Furthermore, a paper feed toilet 11 is provided on one side of the apparatus main body 1, and a paper discharge tray 12 is provided on the other side.

On the other hand, as shown in FIG. 4, a photosensitive drum 13 as an image carrier is rotatably provided in the center of the apparatus main body 1. As shown in FIG. The photosensitive drum 13 is composed of an aluminum tube and an organic photoconductor (OPC) coated on the outer peripheral surface of the aluminum tube. A charging charger 14, an optical system 15, a developing device 16, a transfer peeling device 17, and a cleaning device 18 are sequentially arranged around the photosensitive drum 13 along the rotation direction thereof.

In addition, the paper feed tray 1 is provided on the lower side of the apparatus main body 1.
One conveyance path is provided for conveying the paper P fed from the sheet P1. This conveyance path 19 includes a paper feed roller 20, a feed roller 21a, and a register roller 2 along the conveyance direction of the paper P.
1b, the transfer peeling device 17, the guide 23 and the fixing device 2
4 are arranged in sequence.

The optical system 15 includes a fluorescent lamp 26 that irradiates light onto the original G;
It is composed of a filter 29 that transmits the light from the fluorescent lamp 26 and a convergent light transmitter 27 that guides the reflected light from the document G to the photosensitive drum 13.

When copying, first set the original G on the original platen 2 and set the paper P on the paper feed tray 11, and then turn on the copy button 4. As a result, the document G is irradiated with light from the fluorescent lamp 26, the document table 2 is moved, and the surface of the photosensitive drum 13 is uniformly charged by the charging charger 14. The reflected light from the document G forms an image on the surface of the charged photosensitive drum 13 via the convergent light transmitter 27, thereby forming an electrostatic latent image. This electrostatic latent image is sent to a developing device 16 by the rotation of the photosensitive drum 13, and is developed with toner supplied from the developing device 16. Then, this toner image is transferred to the paper feed tray 11.
The image is transferred to the paper P fed between the photosensitive drum 13 and the transfer charger 17 by the action of the transfer charger 17. After this paper P is peeled off from the photosensitive drum 13, it is sent to the fixing device 24 via the guide 23, where the image is fixed, and then the paper is ejected to the paper ejection tray 12.

By the way, as shown in FIG. 1, the fixing device 16 is composed of a heat roller 31 and a press roller 32 that is in contact with the lower side of the heat roller 31. The heat roller 31 is connected to a support lever 33 that constitutes a support mechanism.
Supported by That is, the support lever 3
A bearing part 33a is formed in the center of the bearing part 3.
A shaft 32a of the heat roller 32 is rotatably supported by the shaft 3a. Furthermore, one end of the support lever 33 is rotatably supported by a support shaft 34, and the narrow end is urged upward by a spring 35, and this urging force causes the press roller 32 to come into pressure contact with the heat roller 31. has been done.

Further, a handle 36 for holding and operating the device is rotatably provided on one side of the device main body 1. The handle 36 is rotatably supported on the upper side by a support shaft 37, and a handle portion 38 is provided on the lower end side. Further, a protrusion 39 is integrally provided on the upper end of the handle 36, and this protrusion 39 is attached to the support lever 39 when the handle 36 is rotated.
It comes into contact with one end side of 3.

Note that a handle portion 40 for carrying the device is provided at the bottom of the other side of the device main body 1.

If the paper P gets jammed between the heat roller 31 and the press roller 32 during image fixing, as shown in FIG.
Rotate in the direction of the arrow.

This rotation of the handle 36 causes the protrusion 39 to push down one end of the support lever 33 against the biasing force of the spring 35, and the support lever 33 rotates downward about the support shaft 34. Thereby, the press roller 32 is separated from the heat roller 31, and the paper P can be removed.

Further, after removing the paper P, the user releases the handle portion 38 of the handle 36. As a result, the support lever 33 is pushed upward by the biasing force of the spring 35, and the press roller 32 comes into pressure contact with the heat roller 31.

As described above, since the handle 36 for holding and operating is also used as a lever for approaching and separating the press roller, the number of parts can be reduced and the apparatus main body 1 can be downsized.

In addition, since it is operated by the handle 36, the handle portion (point where force is applied) 38 can be moved away from the support shaft 37, and the heat roller 31 and press roller 32 can be brought into contact with and separated from each other with a small force, resulting in excellent operability.

[Effects of the Invention] As explained above, according to the present invention, the number of parts can be reduced to make the device smaller and cheaper, and the force required to move the rollers toward and away from each other is small, making it easy to operate. The effect of being immersed in Qin.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are explanatory diagrams showing the contact and separation operations of the heat roller and press roller that constitute the fixing device, and FIG. 3 is an external view showing the electronic copying machine. The perspective view, FIG. 4, shows its internal configuration. 1... Apparatus main body, 24... Fixing device, 31.32...
・Roller, 33...Support lever (support mechanism), 36・
··handle. Applicant's agent Patent attorney Takehiko Suzue Figure 1

Claims (1)

[Claims] An apparatus main body, a fixing device including a pair of rollers provided in the apparatus main body, a support mechanism that supports the pair of rollers so as to be able to move toward and away from the apparatus, and a fixing device that is rotatably provided in the apparatus main body and supports the support mechanism. An image forming apparatus comprising: a handle for holding and operating, the handle being operated to move the pair of rollers toward and away from each other.