JP2002311662A - Electrophotographic recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrophotographic recorder which facilitates the opening/closing of a stacker cover and smoothly performing work for the maintenance of the recorder and removing jammed paper without spoiling relative positional accuracy between an LED head and an image drum. SOLUTION: The turning shaft 11 of a stacker cover 10 is provided in a direction parallel with a recording paper transport direction. An interlocking lever 23 interlocked with the turning of the cover 10 is provided therefor in a device main body 2, whereby the LED head 12 is positioned with respect to the main body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of an electrophotographic recording apparatus, and more particularly to a configuration of an opening / closing mechanism of a stacker cover in the electrophotographic recording apparatus.

[0002]

2. Description of the Related Art FIG. 9 is an external perspective view showing the external appearance of a conventional color electrophotographic recording apparatus, and FIG. 10 is a main part configuration view of the apparatus viewed from the direction of arrow B in FIG.

In this type of apparatus, four sets of image forming mechanisms including an LED head and an image drum including a photosensitive member and a developing roller are prepared for developing each color of yellow, magenta, cyan, and black, for example. Color printing is performed in the direction in which the recording paper is conveyed.

FIG. 10 shows a conventional mounting method of these four sets of image forming mechanisms. In the figure, an image drum 52 for yellow (Y) is arranged on the apparatus main body 51 side of the electrophotographic recording apparatus 50 in order from the upstream side along the conveyance path of the recording medium conveyed in the direction of arrow A by the belt unit 56. , An image drum 53 for magenta (M), an image drum 54 for cyan (C), and an image drum 55 for black (B). Further, a fixing device 57,
And a paper separator 58 are arranged in this order.

[0005] The discharge direction of the recording paper color-printed through these paths is selected by the paper separator 58, and a paper discharge section 62 on the upper surface of the stacker cover 61.
(FIG. 9), or are sequentially discharged to a discharge stacker 59 provided in the apparatus main body 51.

The stacker cover 61 has a shaft 71 whose one end extends in a direction parallel to the plane of movement of the recording paper and perpendicular to the transport direction (the direction of arrow A). It is rotatably held at the upper end. 4 of the stacker cover 61 provided on the apparatus body 51.
LED heads 62 to 65 are mounted at positions facing the two image drums 52 to 55, respectively.

[0007] These LED heads 62 to 65 correspond to the respective photoconductors 52a to 55 of the corresponding image drums 52 to 55.
Exposure is performed on the peripheral surface of the shaft a with a predetermined width in the axial direction of the shaft 71, and urged in a direction away from the stacker cover 61 by an unillustrated urging member such as a coil spring. While being held so as to be slightly displaceable.
Also, positioning protrusions (not shown) are formed at both ends of each of the LED heads 62 to 65.

These projections cause the stacker cover 61 to rotate from the open state shown in FIG.
Each photoconductor 52 corresponding to each of the ED heads 62 to 65
In the process of reaching an operation position (closed state shown in FIG. 9) reaching a predetermined position near each of the image drums 52 to 55a.
55 are respectively fitted into positioning holes (not shown) formed at corresponding positions, and are relatively positioned.

Note that X, Y, and Z shown in FIGS.
The coordinate axis is X parallel to the recording paper conveyance direction (the direction of arrow A).
An axis is set, a Y axis is set in a direction parallel to the moving plane of the recording paper and orthogonal to the X axis (also a direction parallel to the axis direction of the axis 71), and Z is set in a direction orthogonal to both axes Axis is set.

[0010]

As described above, each LED
In order for the positioning projections formed at both ends of each of the heads 62 to 65 to smoothly fit into the positioning holes formed in the opposing image drums 52 to 55, the LED heads are rotated during the rotation of the stacker cover 61. It is desired that the positioning projections at both ends of the are simultaneously fitted into the positioning holes.
Therefore, the rotation axis of the stacker cover 61 is set in a direction orthogonal to the recording paper conveyance direction (the direction of the arrow A), like the axis 71 shown in FIG.

Further, from the necessity of maintenance or removal of jammed paper, in addition to the image drums 52 to 55, the fixing device 57 and the paper separator 58 need to be accessible from above by an operator. The pivot 71 must necessarily be provided at the end of the device.

However, with the above configuration,
As shown in FIG. 10, the stacker cover 61 rotates around one end in the longitudinal direction. Therefore,
In the open state, the other end of the stacker cover 61
It has risen to a considerably high position, causing an undesirable state in handling.

[0013] An object of the present invention is to improve the above-mentioned points and to provide an LE
An object of the present invention is to provide an electrophotographic recording apparatus which facilitates opening and closing of a stacker cover 61 without impairing relative positional accuracy between a D head and an image drum, and which can smoothly perform maintenance of the apparatus and work for removing jammed paper.

[0014]

According to a first aspect of the present invention, there is provided an electrophotographic recording apparatus in which a plurality of image drums each including at least a photosensitive member and a developing unit are arranged so as to be able to be inserted and removed in a conveying direction of a recording medium. And an opening / closing cover rotatably held by the apparatus main body to open and close an upper opening of the apparatus main body, wherein the electrophotographic recording apparatus is held by the opening / closing cover, and the opening / closing cover is closed. A plurality of image drums held by the apparatus main body when being disposed so as to face and close to the photoreceptor, and having first and second engagement portions formed at one end and the other end thereof, respectively. An LED head portion, a plurality of first engagement means formed on the device main body and capable of engaging with each of the first engagement portions, and a plurality of first engagement means capable of engaging with each of the second engagement portions. And a second engaging means, wherein the opening and closing cover is rotated. An axis is set in a direction parallel to the transport direction of the recording medium, and at least one of the first and second engaging means is interlocked with the rotation of the opening / closing cover. Each of the LED head units is attached to the device main body by the engagement of the first engagement unit and the first engagement unit and the engagement of the second engagement unit and the second engagement unit. It is characterized by positioning.

According to a second aspect of the present invention, in the electrophotographic recording apparatus according to the first aspect, third and fourth engagement portions formed at one end and the other end of each of the image drums, respectively. And a plurality of third engagement means formed on the apparatus main body and capable of engaging with each of the third engagement portions, and a plurality of fourth engagement means capable of engaging with each of the fourth engagement portions. An engagement means, and at least one of the third and fourth engagement means is interlocked with the rotation of the open / close cover,
The image drum is positioned on the apparatus main body by the engagement of the third engagement portion and the third engagement means and the engagement of the fourth engagement portion and the fourth engagement means. It is characterized by the following.

Further, in the electrophotographic recording apparatus according to the third aspect and the electrophotographic recording apparatus according to the first or second aspect, an engaging means remote from the rotation shaft is interlocked with the opening / closing cover. I do.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a main part configuration diagram showing the configuration of the first embodiment of the electrophotographic recording apparatus according to the present invention.

The X-, Y-, and Z-coordinate axes in FIG. 1 are set in parallel with the recording paper conveyance direction, as in the above-described conventional examples shown in FIGS. The Y-axis is set in a direction parallel to the moving plane and orthogonal to the X-axis, and the Z-axis is set in a direction orthogonal to both axes. In addition, a common direction is shown also in coordinate axes in other drawings of each embodiment described later.

FIG. 1 is a view showing the internal configuration of the electrophotographic recording apparatus 1 as viewed from the downstream side (also on the minus side of the X axis) of the recording paper conveyance path. A pair of holding plates 8 and 9 for detachably holding an image drum 4 including a photoreceptor, a developing roller and the like are formed on an internal chassis 3 in the inside 2 at a predetermined interval in the Y-axis direction.

Stacker cover 10 as opening / closing cover
Has a pivot shaft 11 extending in parallel with the X axis at one upper end on the rear side upper end of the apparatus main body 2 opposite to the apparatus front side indicated by an arrow D for operation by an operator. It is rotatably held as. The stacker cover 10 has a position facing the image drum 4
The LED head 12 is held in a state described later.
FIG. 2 shows a state where the stacker cover 10 is opened by about 45 degrees.

The LED head 12 has a length sufficient to expose the entire peripheral surface of the photosensitive member 5 (FIG. 2) of the image drum 4 in the longitudinal direction, and is fixed to a head holder 13. At both ends of the head holder 13, a pair of engagement projections 13a and 13b are formed so as to protrude from both ends. On the other hand, the stacker cover 10 is provided with a holding table 14 for holding the LED head 12 at a desired position.

The holding table 14 is formed with engaging holes 14a and 14b into which the pair of engaging projections 13a and 13b of the head holder 13 are respectively fitted and which can freely move within a predetermined range. By disposing the coil spring 15 in a compressed state between the holder 13 and LE,
While biasing the D-head 12 in a direction away from the lid 10a of the stacker cover 10, the D-head 12 is held in a state where a certain amount of positional displacement is possible. Note that the head holder 13 and the LED head 12 correspond to the LED head 12 part.

The LED head 12 and the image drum 4 constitute an image forming mechanism for transferring a predetermined toner to a recording sheet to record an image, and a plurality of image forming mechanisms are used for color recording. They are arranged in the transport direction.

FIG. 2 is an explanatory view of an essential part schematically showing the arrangement of the image forming mechanism. When the stacker cover 10 of the electrophotographic recording apparatus 1 shown in FIG. FIG. 4 is a view as viewed from the direction of arrow D. As shown in FIG. 1, the electrophotographic recording apparatus 1 includes a stacker cover 1.
LED head 12, device main body 2 held at 0 (FIG. 1)
Drum 4 and image drum 4 held in
There are provided four sets of image forming mechanisms each including a transfer roller 6 that is in pressure contact with the photosensitive member 5.

These image forming mechanisms are arranged such that recording is carried between the photosensitive members 5 and the transfer roller 6 by being attracted to a carrier belt (not shown) which moves in the direction of arrow E (minus direction of the X axis) and moves in the same direction. Placed along the paper transport path,
An image drum 4 for yellow (Y), an image drum 4 for magenta (M), an image drum 4 for cyan (C), and an image drum 4 for black (B) are mounted in this order from the upstream side. Also, as shown in the figure,
In a state where the stacker cover 10 is closed, each LED head 12 approaches the opposing peripheral surface of the photoconductor 5 of the image drum 4 and moves to a position where desired exposure is possible.

Since each of these image forming mechanisms has the same configuration in the main part, the image forming mechanism having the image drum 4 for black (B) shown in FIG. Will be described.

As described above, the apparatus main body 2 detachably holds the image drum 4 by the pair of holding plates 8, 9 provided on the side walls 3b, 3c of the internal chassis 3. The holding mechanism includes a pair of engaging projections 4a and 4b protruding from both side surfaces of the image drum 4 facing the holding plates 8 and 9, respectively, and guides formed on the holding plates 8 and 9 engaging with these. Grooves 8a, 9a (FIG. 3)
And is constituted by.

FIG. 3 is a diagram for explaining the relationship between the guide grooves 8a, 9a and the engagement projections 4a, 4b, and is a partial configuration diagram viewed from the direction of arrow D in FIG. Since the guide groove 8a and the engagement protrusion 4a and the guide groove 9a and the engagement protrusion 4b have symmetrically formed engagement portions, the relationship between the guide groove 8a and the engagement protrusion 4a is taken as an example. This will be described below.

Guide groove 8a formed in holding plate 8
Is wider at the upper introduction portion 8b, gradually narrows and turns to the left as it descends from the upper introduction portion 8b, and at the lowermost positioning portion 8c, the outside of the engagement protrusion 4a. The width is about the same as the diameter. As shown in FIG. 1, the pair of holding plates 8 and 9 are both formed so that the surfaces facing the image drum 4 are slightly inclined with respect to the Z axis.
From the lowermost part equal to the width of the image drum 4, it gradually spreads upward.

Next, when the stacker cover 10 is further opened from the state shown in FIG. 1 and the lid 10a is opened at about 90 degrees in parallel with the Z axis, a series of steps for mounting the detached image drum 4 from above is performed. Will be described.

The operator holds the handle 4c at the upper part of the image drum 4 and transports it, and the engaging protrusions 4a,
4b is an upper introduction portion 8b, 9b of each guide groove 8a, 9a.
To the position where it is guided to. When the image drum 4 is lowered from this position, the engagement protrusions 4a and 4b of the image drum 4 are guided by the guide grooves 8a and 9a to move downward. With this downward movement, the image drum 4
Is guided to a desired position by an opposing surface between the holding plates 8 and 9 which gradually narrows.
The position of the image drum 4 in the X-axis direction is such that each of the engaging projections 4a, 4b has a guide groove 8a,
It is positioned by being guided to a desired position by 9a.

In this manner, when the engaging projections 4a, 4b of the image drum 4 reach the lowermost positioning portions 8c, 9c of the guide grooves 8a, 9a, the image drum 4
The positions of the X and Y axes are determined, and the legs 4d to 4g formed at the four corners of the bottom are both in contact with the mounting bottom surface 3a of the internal chassis 3, so that the apparatus main body is kept stable. 2 is held.

Conversely, when the image drum 4 is detached from the apparatus main body 2, the operator lifts the image drum 4 upward by holding the handle of the image drum 4. Since the image drum 4 has a boot-shaped cross section as shown in FIG. 3, a force for rotating the image drum 4 in the direction of the arrow F around the Y-axis at the time of pulling up is generated. Activate and demount smoothly.

At the stage when the image drum 4 is mounted on the apparatus main body 2, the stacker cover 10 (FIG. 1) is rotated and closed in the direction of arrow I around the X axis to enable the recording operation of the electrophotographic recording apparatus 1. To the operating position. FIG.
FIG. 2 is a configuration diagram illustrating a state of the electrophotographic recording apparatus 1 when the stacker cover 10 is closed and is at an operation position.

In the process of closing the stacker cover 10, from the state shown in FIG.
When rotated in the directions, the positioning recesses 12a and 12b formed at both ends in the longitudinal direction of the LED head 12
First, the positioning protrusion 21 formed on the side wall 3c of the internal chassis 3 is fitted into the positioning concave portion 12b closer to the center of rotation, whereby the positioning concave portion 12b is positioned with the rotation. The positioning recesses 12a and 12b correspond to first and second engagement portions, respectively, and the positioning protrusion 21 corresponds to second engagement means.

On the other side wall 3b of the internal chassis 3, an interlocking lever 23 is rotatably held about a rotation shaft 24 parallel to the X axis. The interlocking lever 23 has an L-shaped bent front end portion and a positioning recess 12 a formed at the other end of the LED head 12.
Is formed and is urged in the direction of arrow I around the X axis, but is regulated at the standby position shown in FIG. 1 by a regulating member (not shown).

The restricting member (not shown) is configured to interlock with the rotation of the stacker cover 10 and release the restriction on the position of the interlocking lever 23 when the stacker cover 10 rotates to the vicinity of the operating position shown in FIG. ing. Therefore, when the stacker cover 10 rotates to the operation position shown in FIG. 4 through the above-described process, the positioning protrusion 23a of the interlocking lever 23 is fitted into the positioning recess 12a of the LED head 12, and the LED head 12 is moved to a predetermined position. Position.
In addition, this interlocking lever 23 corresponds to a first engaging means, together with an urging means and a regulating means (not shown).

Each tip of the positioning projections 21 and 23a is
Since each has exactly the same shape, the shape will be described using the positioning projection 21 shown in FIG. 5 as an example. As shown in the figure, both side surfaces 21a and 21c and the lower surface 21b of the positioning projection 21 are both inclined surfaces tapering toward the distal end. On the other hand, the positioning recesses 12a and 12b formed in the LED head 12 have their openings hitting the respective slopes when the positioning projections 21 and 23a are fitted to the vicinity of the fitting position indicated by the dotted line 100 in FIG. It has a shape that is positioned and held in contact with it.

Therefore, the LED head 12 is held by the stacker cover 10 in such a manner that it can be displaced to some extent, but the stacker cover 10 is rotated to the operating position shown in FIG. Protrusion 23
a is fitted into the positioning recess 12a of the LED head 12 and further urged in the (+) direction of the Y-axis to be guided to each inclined surface of the positioning projections 21 and 23a, and finally to a predetermined position. Positioned in position.

On the other hand, when the stacker cover 10 is opened, the interlock lever 23 is rotated in the direction of the arrow H around the X axis by means not shown, and is again returned to the standby position shown in FIG. This position is regulated. Further, the inclination of the lower surface 21a of the positioning projection 21 is effective for smoothly performing the operation of inserting and removing the positioning projection 21 in accordance with the rotation of the stacker cover 10 with respect to the positioning recess 12b of the LED head 12.

Incidentally, the positioning mechanism of the LED head 12 and the image drum 4 described above is similar to that of FIG.
Are provided in the four image forming mechanisms shown in FIG.

As described above, according to the electrophotographic recording apparatus 1 of the first embodiment, the positioning mechanism that fits into the pair of positioning recesses formed at both ends of the LED head 12 is provided on the chassis of the apparatus main body. Since the positioning projections that fit into the positioning recesses do not always need to be fitted at the same time, a rotation axis for opening the stacker cover can be provided in the recording paper conveyance direction.

Embodiment 2 FIG. 6 is a main part configuration diagram showing the configuration of the second embodiment of the electrophotographic recording apparatus according to the present invention. The difference between the electrophotographic recording device 31 and the electrophotographic recording device 1 of the first embodiment shown in FIG. 1 is a component related to the positioning of the LED head 12 and the image drum 40. Therefore, the description will focus on the components that are different from the electrophotographic recording device 1 of the first embodiment,
The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 6, a pair of holding plates 34, 3 for detachably holding the image drum 40 are provided on side walls 33b, 33c of an internal chassis 33 in the apparatus main body 32.
5 are formed at predetermined intervals in the Y-axis direction. The guide grooves 8a, 9a (FIG. 3) described in the first embodiment are formed at the same positions in these holding plates 34, 35, respectively.

As shown in FIG. 6, both plates 34, 35
And the image drum 40, the interval between the two plates is maintained so that a predetermined gap is formed. On the side wall 33c, in addition to the positioning projection 21 as the above-described second engagement means, a regulating projection 37 as a fourth engagement means is formed at the lowermost portion. As described later, the regulating protrusion 37 is provided on the image drum 40.
Is fitted into a regulating V-shaped groove 40b as a fourth engaging portion formed from the bottom to the side.

On the other hand, the first slide member 41 is slidably held in the holding plate 34 in a direction parallel to the Y axis. One end 41a of the first slide member 41 has a positioning recess as a first engagement portion of the LED head 12, similarly to the positioning projection 23a at the tip of the interlocking lever 23 (FIG. 1) of the first embodiment. 12a is formed with a tip projection 41a to be fitted therein, and the other end is provided with an inclined surface 41 abutting on a first action portion 42a of a slide lever 42 described later.
b is formed.

Further, a second slide member 43 is slidably held on the holding plate 34 at a position facing the regulating protrusion 37 of the holding plate 35 in a direction parallel to the Y axis. At one end of the second slide member 43, as will be described later, a tip projection 43 a that fits into a regulating V-shaped groove 40 a as a third engagement portion formed from the bottom to the side of the image drum 40 is formed. At the other end,
An inclined surface 43b that comes into contact with a second action portion 42b of the slide lever 42 described later is formed.

The first and second slide members 4
1 and 42 are both urged in the negative direction of the Y-axis by urging means (not shown), and the inclined surface 41b of the first slide member 41 is moved in the Y-axis direction as shown in FIG. The movement of the Y-axis in the negative direction is restricted at each of the restriction positions slightly located on the plus side from the inclined surface 43b of the Y-axis.

The slide lever 42 is connected to the inner chassis 33
Are slidably held in a direction parallel to the Z axis. This slide lever 42
The first abutment on the inclined surface 41b of the first slide member 41
Action portion 42a and the inclined surface 43 of the second slide member 43
The second action portions 42b that are in contact with the respective “b” are formed.

Further, the slide lever 42 is urged in the positive direction of the z-axis by urging means (not shown), and the position shown in FIG. , 43b, the movement of the z-axis in the positive direction is restricted. The upper end 42c of the slide lever 42 protrudes upward from the apparatus main body 32 by a predetermined height h when the slide lever 42 is at the restriction position.

Incidentally, the first slide member 41 and the slide lever 42 and a member (not shown) for urging them correspond to a first engagement means, and the second slide member 43 and the slide lever 42 and these members. A member (not shown) for urging the third member corresponds to a third engaging means.

With the above configuration, the stacker cover 10 is
9 is further opened from the state shown in FIG.
A series of movements when the detached image drum 40 is mounted from above in a state where the image drum 40 is opened about 0 degrees will be described.

The operator holds the upper handle 40c of the image drum 40 and transports the same by holding the handle 40c.
The guide grooves 8 formed in the holding plates 34 and 35 have the same shapes as those of the first embodiment shown by dotted lines in FIG.
a and 9b are moved to positions guided by the upper introduction portions 8b and 9b, and further lowered downward along the guide grooves 8a and 9a.
With the downward movement, the position of the image drum 40 in the X-axis direction is changed to the guide grooves 8a, 9 in which the widths of the engagement protrusions 4a, 4b are gradually reduced as in the first embodiment.
It is positioned by being guided to a desired position by a.

On the other hand, since the distance between the plates 34 and 35 and the image drum 40 is maintained such that a predetermined gap is formed over the entire area, the image drum 40 is located at the bottom thereof. The legs 4d to 4g formed at the four corners smoothly move to positions where they come into contact with the mounting bottom surface 33a of the internal chassis 33. In this manner, the image drum 40 reaches the lowermost mounting position, but immediately before that, the regulating protrusion 37 formed at the lowermost portion of the side wall portion 33c is formed from the bottom to the side of the image drum 40. Fit into the groove 40b.

FIG. 8 shows the shape of the regulation V-shaped groove 40b formed on the image drum 40 and the shape of the tip of the regulation projection 37. FIG. 8A shows the regulation of the image drum 40 from the plus side of the Y axis. FIG. 4B is a partial side view of the V-shaped groove 40b, and FIG. 4B is a cross-sectional view of the cross-section passing through the indication line 101 in FIG.

As shown in the drawing, at this time, the wedge-shaped tip portion 37a of the regulating projection 37 is fitted into the regulating V-shaped groove 40b having a V-shaped cross section. As described above, the image drum 40 is mounted on the mounting bottom 3.
Although the position in the X-axis direction is determined at the stage of being placed on 3a, there is a margin that allows some movement in the Y-axis direction.

In this state, the stacker cover 10 is rotated and closed in the direction of arrow I about the X axis, and is displaced to an operation position where the recording operation of the electrophotographic recording apparatus 31 is enabled. FIG. 7 is a configuration diagram illustrating a state of the electrophotographic recording apparatus 31 when the stacker cover 10 is closed and is at the operating position.

In the process of closing the stacker cover 10, from the state shown in FIG. 6, when the stacker cover 10 is further rotated in the direction of arrow I around the X axis, the positioning recesses 12 a formed at both ends in the longitudinal direction of the LED head 12 are formed. , 12b, the positioning protrusion 21 formed on the side wall portion 33c of the internal chassis 33 is fitted into the positioning recess 12b as the second engagement portion closer to the center of rotation. Are positioned with the rotation.

On the other hand, the upper end 42c of the slide lever 42 abuts on the lower surface 10b of the lid 10a immediately before the stacker cover 10 is brought into the operating position to be closed, and is pushed downward to start moving downward. With this downward movement, first, the second action portion 42 b is moved to the second slide member 43.
And moves it in the plus direction of the Y-axis. Note that the shape of the distal end protrusion 43a of the second slide member 43 and the shape of the regulating V-shaped groove 40a of the image drum 40 are the same as those of the distal end portion 37a of the regulating protrusion 37 and the shape of the regulating V-shaped groove 40b shown in FIG. It is formed symmetrically.

Accordingly, the second slide member 43 pushes the image drum 40 in the same direction by the movement thereof, and further, the tip 37a of the regulating projection 37 and the regulating V-shaped groove 40b shown in FIG. So, the image drum 40
Can be positioned in both X and Y axis directions.

Further, in the process of moving the slide lever 42 downward to move the positioning of the image drum 40, the first action portion 42a presses the inclined surface 41b of the first slide member 41, and the tip protrusion 41a is moved. LED
The LED head 12 is positioned in both the X and Y axial directions by being fitted into the positioning recess 12 a of the head 12.
Since this positioning operation is exactly the same as that of the first embodiment, its description is omitted.

When the first slide member 41 starts to move in the plus direction of the Y axis, the first slide member 41 is moved to a position where the positioning recess 12a of the LED head 12 can be fitted.
The shape of each part such as the predetermined height h of the tip projection 41a must be considered.

In the second embodiment, the holding plate 3
The width of the guide grooves 8a, 9a (FIG. 3) formed on the 4, 4 and 35 (FIG. 3) is gradually narrowed downward as in the first embodiment, and the position of the image drum 40 in the X-axis direction is determined. As described above, since the positioning of the image drum 40 in the X-axis direction can be performed by the movement of the second slide member 43, the width thereof does not need to be particularly reduced.

As described above, according to the electrophotographic recording apparatus 31 of the second embodiment, in addition to the effect of the first embodiment, the LED head 12 and the image drum 40 are positioned in conjunction with the operation of closing the stacker cover. With the configuration, when the image drum 40 is inserted and removed, the image drum 40 can be set in a free state, so that the insertion and removal operation can be performed smoothly.

[0065]

According to the electrophotographic recording apparatus of the first aspect,
Since the rotation axis for opening the opening / closing cover can be provided in the direction in which the recording medium is conveyed, the operator can easily open and close the opening / closing cover. Further, even if the cover is rotated in this direction, the positioning of the LED head can be reliably performed.

According to the electrophotographic recording apparatus of the second aspect, in addition to the effect of the first aspect, when the image drum is inserted / removed, the image drum can be set in a free state in which the position of the image drum is not restricted. Can be performed.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram showing a configuration of an electrophotographic recording apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part schematically showing an arrangement configuration of an image forming mechanism.

FIG. 3 is a diagram illustrating a relationship between guide grooves 8a and 9a and engagement protrusions 4a and 4b, and is a partial configuration diagram viewed from the direction of arrow D in FIG.

FIG. 4 is a configuration diagram showing a state of the electrophotographic recording apparatus 1 when the stacker cover 10 is closed and is in an operation position.

FIGS. 5A and 5B are positioning protrusions 21 and 23a.
It is a figure for explaining the shape of each tip part.

FIG. 6 is a main part configuration diagram showing a configuration of an electrophotographic recording apparatus according to a second embodiment of the present invention.

FIG. 7 is a configuration diagram illustrating a state of the electrophotographic recording apparatus 31 when the stacker cover 10 is closed and is in an operation position.

FIG. 8A is a partial side view of the regulating V-shaped groove 40b of the image drum 40 viewed from the plus side of the Y axis;
FIG. 2B is a cross-sectional view of the cross section passing through the instruction line 101 in FIG.

FIG. 9 is an external perspective view showing the external appearance of a conventional color electrophotographic recording apparatus.

10 is a main part configuration diagram of a conventional color electrophotographic recording apparatus viewed from the direction of arrow B in FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 electrophotographic recording device, 2 device main body, 3 internal chassis, 3 a mounting bottom surface, 3 b, 3 c side wall portion,
4 image drum, 4a, 4b engaging projection, 4c
Handle, 4d-4g Leg, 5 Photoconductor, 6
Transfer roller, 8, 9 holding plate, 8a, 9a guide groove, 8b, 9b upper introduction part, 8c, 9c positioning part, 10 stacker cover, 10a lid,
10b lower surface, 11 rotating shaft, 12 LED head, 12a, 12b positioning recess, 13 head holder, 13a, 13b engaging projection, 14 holding stand, 15 coil spring, 21 positioning projection, 23 interlocking lever, 23a positioning projection, 2
4 rotating shaft, 31 electrophotographic recording device, 32 device main body, 33 internal chassis, 34, 35 holding plate, 37 regulating protrusion, 40 image drum, 4
0a, 40b Regulation V-shaped groove, 41 First slide member, 41a Tip projection, 41b Inclined surface, 42
Slide lever, 42a first working portion, 42b
2nd action part, 42c upper end part, 43 2nd slide member, 43a front-end | tip part protrusion, 43b inclined surface.

Continued on the front page F term (reference) 2H030 AA07 AB02 AD16 BB02 BB23 2H071 AA05 AA13 AA20 AA42 BA03 BA04 BA13 BA14 BA16 BA19 BA20 BA23 BA24 BA36 DA02 DA08 DA15 EA04 EA06 EA18 2H076 AA17 AA28 AB42 AB60 EA01

Claims (3)

[Claims] 1. An apparatus main body in which at least a plurality of image drums each integrally configured with a photoconductor and a developing unit are arranged so as to be able to be inserted and removed in a conveying direction of a recording medium, and an upper opening of the apparatus main body is opened and closed. An electrophotographic recording apparatus having an opening / closing cover rotatably held by the apparatus main body; wherein the photoconductor of each image drum held by the opening / closing cover is held by the opening / closing cover when the opening / closing cover is closed. A plurality of LED heads, which are arranged to face each other and have first and second engagement portions formed at one end and the other end thereof, respectively; A plurality of first engaging means capable of engaging with the second engaging part and a plurality of second engaging means capable of engaging with each of the second engaging parts. The axis is set in a direction parallel to the conveyance direction of the recording medium. , Of the first and second engagement means,
At least one of the engagement means is interlocked with the rotation of the opening / closing cover, and the engagement between the first engagement portion and the first engagement portion, and the engagement between the second engagement portion and the first engagement portion are performed. An electrophotographic recording apparatus, wherein each of the LED head portions is positioned on the apparatus main body by engagement with a second engagement means. 2. The image forming apparatus according to claim 1, further comprising third and fourth engaging portions formed at one end and the other end of each of the image drums; A plurality of third engaging means capable of engaging with each other and a plurality of fourth engaging means capable of engaging with each of the fourth engaging portions, among the third and fourth engaging means. At least one of the engagement means is interlocked with the rotation of the opening / closing cover, and the engagement of the third engagement part with the third engagement means, and the engagement of the fourth engagement part with the third engagement part. 2. An electrophotographic recording apparatus according to claim 1, wherein said image drum is positioned on said apparatus main body by engagement with said fourth engagement means. 3. The electrophotographic recording apparatus according to claim 1, wherein an engagement means remote from the rotation shaft is linked to the opening / closing cover.