KR20060062920A - Manual paper feeding unit of image forming apparatus - Google Patents

Abstract

The manual feed unit of the disclosed image forming apparatus is connected to a pair of rack bars and rack bars that are engaged with the pinion and pinion which are fixed to the feed unit body having the guide frame and the inside of the feed unit body and interlock with each other in a corresponding direction. It includes a paper guide for controlling the operation of the elastic member is mounted to the rack bar and formed in the center of the guide frame formed along the direction of movement of the elastic bar and the convex-shaped projection is fixed by inserting the projection of the elastic member It is provided with a guide means consisting of an insertion portion.

Paper feed unit, rack, pinion

Description

Manual Paper Feeding Unit of Image Forming Apparatus

1 is a cross-sectional view showing a manual feed unit of a conventional image forming apparatus.

FIG. 2 is an enlarged cross-sectional view of the symbol A shown in FIG. 1.

3 is a perspective view showing the manual feed unit of the image forming apparatus of the present invention.

4 is a cross-sectional view taken along the line II ′ shown in FIG. 3.

Fig. 5 is a partial sectional view showing a second embodiment according to the manual feed unit of the image forming apparatus of the present invention.

6 is a partial cross-sectional view along the line H-H 'shown in FIG.

** Explanation of Signs of Major Parts of Drawings **

100: guide frame

110: paper feed unit body

115: paper guide

120: pinion

141: stepping

142: groove

150: rack bar                 

200, guide means

210: insertion unit

220: guide member

The present invention relates to a manual feed unit of an image forming apparatus, and more particularly, in a manual feed unit in which a pinion is engaged between a set of rack bars, the rack bar and the pinion are assembled. A manual feeding unit of an image forming apparatus to accurately guide a position to prevent assembly failure.

In general, the paper feeding method of an image forming apparatus such as a copier, a printer, or a facsimile machine is an automatic paper feeding method for storing a plurality of recording papers in a paper cassette, a special paper, or a single sheet of paper. It is divided into manual feeding method.

The image forming apparatus used in the manual feeding method includes a manual feeding unit in which an insertion hole is formed so as to manually feed recording paper into one side.

The insertion port is provided with a paper guide for adjusting the width of the envelope, label paper, OHP film, card paper, etc. to adjust the width so that the special paper is inserted.

1 is a cross-sectional view showing a manual feeding unit of a conventional image forming apparatus, and FIG. 2 is an enlarged cross-sectional view of the reference numeral A of FIG.

1 and 2, the manual feeding unit of the image forming apparatus as described above is a paper feeding unit body 110, the guide frame 100 is formed and the paper protruding out to guide the width of the paper fed paper A guide 115, a pair of rack bars 150 coupled to the paper guide 115, and a pinion 120 engaged with the rack bars 150 to interlock the rack bars 150 are installed.

At this time, the pinion 120 is installed in the paper feeding unit body 110 in the center, is fixed to the center line (C) is installed to rotate.

The manual feed unit configured as described above can adjust the width of the recording paper fed into the insertion hole by adjusting the paper guide 115 mounted to protrude to the outside of the paper feeding unit body 110 from side to side.

At this time, the pair of rack bar 150 installed to be connected to the paper guide 115 has a structure in which the pinion 120 is engaged between the pair of rack bar 150.

When the operator manually assembles the manual feed unit having the structure as described above, the rack bar 150 is installed so as to correspond on the feed unit body 110, and then the pinion is fixed to the center of the feed unit body 110 Engage 120 between rack bars 150.

In this state, the rack bar 150 and the paper guide 115 are fastened so that the rack bar 150 slides in the sliding hole 101 using the fastening means 111 such as a bolt.

Here, the pair of rack bar 150 is installed to correspond to each other in a state located at the left and right ends on the sliding hole 101, the pinion 120 from the position of the center of the paper feeding unit body 110, the rack bar ( 150).

Referring to FIG. 2, the rack bar 150 may be twisted from the center line C of the paper feeding unit body 110 because the rack bar 150 is not fixed at the central position of the paper feeding unit body 110. .

Therefore, when the engagement between the rack bar 150 and the pinion 120 is incorrectly assembled in the above state, the gears 150a and 120a of the rack bar 150 and the pinion 120 are broken. By producing a product defect, there is a problem of an increase in manufacturing cost and thereby a decrease in product productivity.

In addition, when the alignment state of the rack bar 150 is separated from the center line (C) of the paper feeding unit body 110 as described above, the product is reassembled again because the width is not precisely adjusted to fit the width of the special paper. There is a problem that must be done.

Therefore, the present invention was devised to solve the above problems, and an object of the present invention is to fix and install a set of rack bars to be fixed exactly in the assembly position at the center of the paper feed unit body as described above, pinion in that state By assembling and assembling precisely, to provide a manual feed unit of the image forming apparatus to reduce product defects, improve the width control defects for special paper, improve product quality and product productivity.

The manual feed unit of the image forming apparatus of the present invention includes a paper feeding unit body having a guide frame; A pinion which is fixed to a center inside the paper feeding unit body and rotates; A pair of rack bars engaged with the pinion and guided to the guide frame in a direction corresponding to each other; A paper guide connected to the rack bar to control the operation of the rack bar; And guide means for guiding the rack bar to be inserted into a position on the guide frame.

Here, the guide means includes a guide member mounted to the rack bar, the projection is formed, and the insertion portion is formed in the guide frame and the projection of the guide member is inserted.

The guide member is preferably a metal piece that is an elastic member.

In addition, the guide means may be configured to be mounted to the rack bar, a guide member mounted to slide insertion / protruding by a spring fitted into the groove formed on the rack bar, and the insertion portion is inserted and fixed to the guide member.

In addition, the paper guide is preferably provided with a hook that is fixed over the hook groove of the paper feeding unit body to prevent the rack bar from being pushed when fixed to a position corresponding to each other.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the manual feed unit of the image forming apparatus according to the present invention.                     

3 is a perspective view showing a manual feed unit of the image forming apparatus of the present invention, FIG. 4 is a cross-sectional view taken along the line I-I 'shown in FIG. 3, showing a first embodiment of the present invention, and FIG. FIG. 6 is a partial sectional view showing a second embodiment according to the manual feed unit of the image forming apparatus of the invention, and FIG. 6 is a partial sectional view along the line H-H 'shown in FIG.

3 and 4, a first embodiment according to the manual feed unit of the image forming apparatus of the present invention will be described.

3 and 4, the manual feed unit of the image forming apparatus according to the first embodiment of the present invention is installed at one side of the image forming apparatus main body 300 so as to feed recording paper of various sizes in order, and a guide frame. The paper feeding unit body 110 having the 100 formed therein, and the pinion 120 fixed and rotated at the center thereof are installed in the paper feeding unit body 110, and are engaged with the pinion 120 to the paper feeding unit body 110. A pair of rack bars 150 inserted into the formed sliding holes 101 and interlocked in a corresponding direction to each other and fastened to the rack bars 150 by means of fastening means 111 such as bolts are used to slide the rack bars 150 into the sliding holes. The guide means 200 for fixing the paper guide 115 and the pair of rack bars 150 to be interlocked at the same position at the same distance from each other so as to easily engage with the pinion 120 at the correct position. Equipped.

The guide means 200 is a concave insertion portion 210 formed in the center portion of the guide frame 100 formed along the direction of movement of the rack bar 150 and to fix the movement position of the rack bar 150 The guide member 220 is installed to be fitted to the rack bar 150 and has a curved protrusion 221 inserted into the insertion part 210.                     

The guide member 220 is mounted in a state in which the rack bar 150 is moved to the left and right, which is inserted into the insertion part 210 when the rack bar 150 is moved, or an elastic member such as a metal piece to facilitate removal. It is good to use

Next, a first embodiment of the present invention configured as described above will be described in more detail through a method for assembling the manual feed unit.

Referring to FIG. 4, a pair of rack bars 150 are mounted in the sliding holes 101 formed to correspond to both sides of the paper feeding unit body 110, respectively. Install to interlock in the direction.

Here, the pinion 120 is installed in the center of the paper feeding unit body 110, and is installed so as to match the position of the center line (C), and moves the set of rack bar 150 installed as described above to the outside of the sliding hole 101. After the rack bar 150 and the pinion 120 are engaged.

At this time, the projections 221 of the guide members 220 installed on the rack bars 150 are fitted into the insertion portions 210 formed on the guide frame 100 so that the pinion 120 is engaged between the rack bars 150. When it is to, the rack bar 150 is to be able to be an accurate match in the state to prevent the left and right movement.

In addition, since the guide member 220 mounted on the rack bar 150 is a metal piece having elasticity when the rack bar 150 moves left and right, the protrusion 221 of the guide member 220 is easily inserted from the insertion portion 210. In addition to being removed will be moved along the inner wall of the guide frame 100.

The rack bar 150 is connected to the paper guide 115 by the fastening means 111 to penetrate the sliding hole 101 to slide in the sliding hole 101.

Accordingly, by adjusting the paper guide 115 to the left and right, a set of rack bars 150 engaged with the pinion 120 are interlocked.

When the rack bar 150 is positioned outside the sliding hole 101 through the manipulation of the paper guide 115 as described above, the protrusion 221 of the guide member 220 is inserted into the insertion part 210 as described above. By being fixed to the initial pinion 120 is returned to the assembly position.

Referring to FIG. 7, in order to prevent the pair of rack bars 150 from being pushed from side to side in the fixed state as described above, a protrusion protrusion 141 is formed in the paper guide 115, and the protrusion protrusion is formed. 141 is inserted into the hook groove 142 formed in the paper feeding unit body 110 to be spread over.

On the other hand, although not shown in the drawings, in the above case, when a pair of the rack bar 150 is located outside the sliding hole 101, the projection 221 of the guide member 220 is inserted and fixed to the insertion portion 210 However, by forming a plurality of the insert portion 210 as described above in a plurality of positions on the guide frame 100 of the paper feeding unit body 110, a set of rack bar 150 is not located outside the sliding hole 101. Each rack bar 150 position can be fixed even if it is not in the state so that the pinion 120 can be accurately engaged between the rack bars 150.

That is, the rack bar 150 is fixed at an arbitrary position in the sliding hole 101 and then engaged with the pinion 120 mounted at the center of the paper feeding unit body 110, thereby making the rack bar 150 sliding door. It is to be fixed at any position within the 101 to be engaged with the pinion (120).

Next, a second embodiment of the manual feed unit of the image forming apparatus of the present invention will be described with reference to FIGS. 4 and 5. FIG.

4 and 5, the manual feeding unit of the image forming apparatus of the present invention includes a set of rack bars 150 and rack bars 150 engaged with the pinion 120 as in the first embodiment. In the guide means 230 for fixing the position of the guide means 230 is formed in the concave shape on the guide frame 100, the paper feeding unit body 110, and the pinion 120 is fixed to the center line (C) Insertion part 231 which is a fixed groove formed in the guide frame 100 of the matching place and the rack bar 150 is installed in the rack bar 150 and inserted into the insertion part 231 to be moved through the sliding hole 101 ( It consists of a guide member 232 for fixing the position of 150.

Here, the guide member 232 is mounted to the rack bar 150, the spring 233 is mounted to the groove 234 formed in the rack bar 150, is connected to the spring 233 to the groove 234 inside It is mounted to slide in / out.

That is, when a predetermined force is applied to the guide member 232, the groove 234 is inserted into the groove 234, and when it reaches the position of the insertion portion 231, the protrusion 232 protrudes to be inserted into the insertion portion 231.

Therefore, after the guide member 232 mounted on the pair of rack bars 150 is inserted into the respective insertion portions 231 to fix the position of the rack bars 150, the pinion 120 is removed in such a state. By installing the rack bar 150 to be engaged with each other, as in the first embodiment, the rack bar 150 may be stably fixed, and then the pinion 120 may be assembled to ensure accurate coupling.

In addition, referring to FIG. 5, a plurality of inserting portions 231 are formed on the guide frame 100 as in the first embodiment, such that the rack bar 150 is located at an arbitrary position in the sliding hole 101. The pinion 120 may be mounted by being able to be fixed at.

On the other hand, referring to Figure 7, the latching protrusion 141 is formed in the paper guide 115 as in the first embodiment is inserted into the latching groove 142 formed in the paper feeding unit body 110 is fixed to the rack bar When the 150 is fixed at an arbitrary position as described above, the phenomenon of being pushed to the left and right can be further prevented.

In addition, when the rack bar 150 is fixed at any position as described above, the latching groove 142 may be formed in plural on the paper feeding unit body 110 to correspond to the position.

Therefore, according to the manual feeding unit of the image forming apparatus of the present invention, when a pair of rack bars installed on the manual feeding unit to adjust the width of the recording paper and a pinion for interlocking the operation of the rack bars are fed, a pair of rack bars are interlocked. The center of the unit body is fixed so as to be located at the same corresponding distance as the boundary, but it is fixed so as not to be twisted so that it can be securely engaged with the pinion, so that when the rack bar and the pinion is engaged by the operator to precisely engage each rack bar It is possible to effectively prevent product defects caused by assembling in an uneven alignment state.

In addition, as described above, an increase in manufacturing cost due to component damage caused by non-matching of teeth can be reduced, and further, there is an effect of increasing product productivity.

Claims (5)

A paper feeding unit body having a guide frame; A pinion which is fixed to a center inside the paper feeding unit body and rotates; A pair of rack bars engaged with the pinion and guided to the guide frame in a direction corresponding to each other; A paper guide connected to the rack bar to control the operation of the rack bar; And And a guide means for guiding the rack bar to be inserted into the guide frame on the guide frame. The method of claim 1, The guide means is a manual feeding unit of the image forming apparatus, characterized in that it comprises a guide member mounted to the rack bar, the projection is formed, and the insertion portion is formed in the guide frame and the projection of the guide member is inserted. The method of claim 2, The guide member is a manual paper feeding unit of the image forming apparatus, characterized in that the elastic material. The method of claim 1, The guide means is mounted to the rack bar, the guide member is mounted to slide the insertion / protruding by a spring fitted in the groove formed on the rack bar, and an insertion portion formed in the guide frame and the guide member is inserted and fixed And a manual feeding unit of the image forming apparatus. The method of claim 1, And the paper guide is further provided with a hook portion fixed to the hook groove of the paper feeding unit body to prevent the rack bar from being pushed when guided to a position corresponding to each other.

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