JPH0738083B2 - Recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of use> The present invention relates to a recording apparatus used in a facsimile, a copying machine, or the like, and more specifically, an opening / closing cover is carelessly opened with respect to an apparatus main body with a tray attached. The present invention relates to a recording device that can prevent the accidental occurrence.

<Prior Art> Image recording apparatuses such as facsimiles and copiers are widely used today. In these recording apparatuses, a cover that can be opened and closed is provided for the main body of the apparatus, and the inside of the apparatus is opened by opening the cover. The recording sheet that is exposed and jammed during recording is removed, or the developing toner is replaced.

Further, in the recording apparatus, it is general that a discharge tray for recording sheets is detachably attached to the opening / closing cover and the recording sheet on which an image is recorded is discharged to the tray.

<Problems to be Solved by the Invention> In the apparatus having the above configuration, the opening / closing cover can be opened even with the discharge tray attached, but if the opening / closing cover is opened with the tray attached, the discharge tray is damaged. Alternatively, the tray may be an obstacle and the open / close cover may be in a half-open state.

When a method of recording by exposing the photosensitive drum to light is used as the recording means, there is one that shields the photosensitive drum in conjunction with opening and closing of the opening / closing cover.
When the open / close cover is in a half-opened state, the photosensitive drum may not be completely shielded from light and the drum may be damaged. Further, if the developer cartridge or the like is forcibly replaced with the opening / closing cover half-opened, the cartridge may come into contact with the opening / closing cover or the frame during work, and the cartridge may be damaged.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a recording apparatus in which the opening / closing cover cannot be opened without removing the tray.

<Means for Solving the Problems> A typical means for solving the above problems according to the present invention is an apparatus main body having a recording unit for recording an image on a recording sheet, and an opening / closing unit for the apparatus main body. A possible opening / closing cover, cover releasing means for releasing the closed state of the opening / closing cover with respect to the apparatus main body, a tray which is attachable / detachable with respect to the opening / closing cover, and on which the recording sheet is placed, The present invention is characterized in that release preventing means for preventing the operation of the cover releasing means when the tray is attached to the opening / closing cover is provided.

<Operation> In the above means, the cover releasing means cannot be operated when the tray is attached to the opening / closing cover, and the tray must be removed in order to open the opening / closing cover.

Therefore, it is possible to prevent the opening / closing cover from being accidentally opened with the tray attached.

<Embodiment> Next, an embodiment according to the present invention in which the above means is applied to a facsimile apparatus will be described.

FIG. 1 is a perspective explanatory view of a manual sheet feeding portion and a discharging portion of a recording sheet, FIG. 2 is a sectional configuration explanatory view of the entire apparatus, and FIG. 3 is an overall perspective explanatory view.

First, the overall configuration of this apparatus will be described. Reference numeral A is a document reading unit, which reads information written on a document, converts it into an electric signal, and transmits it to a predetermined recording system. A recording unit B records an image on a recording sheet conveyed according to an image signal. Further, C is a recording sheet conveying means, which conveys the recording sheet accommodated in the cassette or the recording sheet supplied from the manual feeding port to the recording means B and discharges the sheet after recording.

In FIG. 3, D is the number of recorded sheets, recording density, an operation panel provided with a transmission switch, and E is a telephone. This recording apparatus has a plurality of storage shelves inside and is mounted on a device mounting table G that can store a spare recording sheet and the like by opening and closing the door F.

The configuration of each part of this recording apparatus will be described below in order.

[Document reading means]

As shown in FIG. 2, the document reading means A has a document mounting table 1 formed on the upper surface of the apparatus.
Among the originals 3 which are stacked and placed with the original surface facing down and which are guided by the side guides 2, the lowermost original 3 is pre-conveyed by the pre-conveying roller 4a and the pressure contact member 4b in pressure contact with the pre-conveying roller 4a and the separating roller. 5a and a pressure-contact member 5b which is in pressure-contact with this are separated one by one and are fed in the direction of arrow a in FIG. Then, the separated and fed original 3 is conveyed by a conveying roller 6a.
Also, the original surface is pressed against the reading glass 8c by the pressing member 8b made of a white polyester film that is conveyed by the pinch roller 6b that is pressed against it by the spring 7 and pressed downward by the weight shaft 8a, and passes through the glass 8c. When
The light from the light emitting member 8d such as an LED is irradiated, and the reflected light from the document surface is imaged on the photoelectric conversion element 8f such as a CCD through the lens 8e to convert the image described in the document into an electric signal. It is configured as follows. In this embodiment, a contact type reading sensor using a short focus image forming lens is used as the lens 8e.

The original 3 whose image is read by the optical means is a discharge roller 9a and a pinch roller 9b which is pressed against the discharge roller 9a by a spring 7.
The document is discharged to the document discharge tray 10.

[Recording means]

The recording means B is configured as a laser beam printer in this embodiment. The structure will be described. The surface of the photosensitive drum 11 rotating in the direction of the arrow b is charged with a charger 12 to charge the drum surface, and light from a laser oscillator 13 that oscillates a laser beam in accordance with an image signal is converted into a polygon. Mirror 14
The electrostatic latent image is formed by exposing it to the rotating drum 11 by reflecting the latent image with the toner in the developing unit 15 and visualized with toner. Further, the toner image is a photosensitive drum.
Transfer recording is performed on the recording sheet 17 conveyed between the transfer roller 16 and the transfer roller 16 pressed against the recording sheet 11. Further, the photosensitive drum 11 after the toner transfer is configured to be cleaned by the cleaning member 18.

The photosensitive drum 11, the charger 12, the developing unit 15, and the cleaning member 18 are housed in a recording cartridge 19, and the cartridge 19 is detachably housed in the apparatus main body as described later.

[Recording sheet conveying means]

Next, the recording sheet conveying means C will be described. A cassette 20 is detachably attached to the lower portion of the apparatus main body, and recording sheets 17 made of cut sheets are stacked and accommodated in the cassette 20. This recording sheet 17 is the second
As shown by an arrow c in the figure, one sheet of the uppermost layer is fed by a half-moon shaped feeding roller 21, registered and conveyed by a pair of cassette conveying rollers 22a and 22b which are in pressure contact with each other, and further, a driving roller 23a. A pair of conveying rollers composed of pinch rollers 23b conveys the photosensitive drum 11 in synchronism with the rotation of the photosensitive drum 11, and an image is recorded when passing between the photosensitive drum 11 and the transfer roller 16. The sheet 17 after recording is a fixing roller having a heater 24 built-in. The toner image is fixed by applying heat and pressure when passing between the pressure roller 25b and the pressure roller 25b which is pressed against the pressure roller 25a, and is discharged to the recording sheet discharge tray 27 by the discharge roller pair 26a, 26b. .

Further, in FIG. 2, a manual insertion port 28 is provided on the left side surface of the apparatus main body.
Is formed, and a manual feed tray 29 serving as a sheet supply tray is attached to the manual feed port 28. The manual feed tray 29 is rotatably mounted around a shaft 30. When used, the tray 29 is tilted down as shown in FIG. 2, and the recording sheet 17 is placed on the tray 29 and fed from the manual feed port 28. The separating member 31 pressed against the 23a separates the sheets one by one, and the conveying rollers 23a and 23b convey the sheet to a recording position.

[Bypass tray and auxiliary tray]

Here, the manual tray 29 will be described in detail. As shown in FIG. 1, this is a fixed guide on the inner surface side of the apparatus.
29a and slide guide 29b slidable in the direction of arrow d
Is provided, and is configured to guide the side edge of the recording sheet 17 placed on the tray 29. Further, a fitting recess 29c is provided at the tip of the rotation of the tray 29.
The fitting projection 32a of the auxiliary tray 32 can be fitted into the 9c. That is, by fitting the fitting convex portion 32a of the auxiliary tray 32 into the fitting concave portion 29c of the manual feeding tray 29, the auxiliary tray 32 can be connected to the manual feeding tray 29, and by removing the auxiliary tray 32, the manual feeding tray 29 It is configured so that it can be removed from the.

Therefore, when the size of the recording sheet 17 to be placed on the manual feed tray 29 is long, by connecting the auxiliary tray 32 to the manual feed tray 29, the recording sheet 17 can be reliably placed on the tray and manually fed. Is. If the size of the recording sheet 17 is short, it is possible to remove the wasted space for stacking the recording sheets by removing the manual feed tray 29. Further, when the manual feed tray 29 is not used, the auxiliary tray 32 is removed. Can be stored compactly,
There is no need to create a wasted space in the main body of the device or increase the size of the entire device.

Further, as shown in FIG. 1, on the lower surface of the recording sheet discharge tray 27 located above the manual feed tray 29, there is a key-like locking member with a space slightly wider than the width of the auxiliary tray 32.
33 is projected. The locking member 33 constitutes a housing portion for the auxiliary tray 32, and the auxiliary tray 32 removed from the manual feed tray 29 is shown in FIGS. 2 and 3 from the tapered side (left end side in FIG. 1). Thus, the auxiliary tray 32 can be housed on the lower surface of the recording sheet discharge tray 27 by inserting and locking between the hook-shaped locking members 33.

By providing the accommodation portion for the auxiliary tray 32 as described above,
The auxiliary tray 32 removed from the manual feed tray 29 does not get in the way and can be prevented from being lost. Further, in general, the width and length of the discharge tray 27 are the same as or slightly larger than the width and length of the manual feed tray 29 because the discharge tray 27 reloads the recording sheets 17 stacked on the manual feed tray 29. The recording sheet discharge tray, which is of a size and has the accommodation portion above the manual feed tray 29.
By providing the lower surface of 27, they can be accommodated so as to overlap each other and can be compactly accommodated in space.
In addition, since it is not necessary to add a special space as an auxiliary tray accommodating portion to the apparatus main body, and the accommodating tray 29 is accommodated in the vicinity of the manual feed tray 29, the accommodating place is easy to understand and handling is easy.

[Record size switch]

Further, as shown in FIG. 1, the manual feed tray 29 is provided with a recording sheet 17 to be manually fed to the inside of the apparatus of the tray 29 and outside the fixed guide 29a, that is, outside the placing area of the recording sheet 17. A size switch 34 for inputting a size is provided. This switch 34 is A4 size, letter size (LTR), legal size (LGL) in this embodiment.
It is configured so that the three types can be input.

As a result, when the operator inputs the size of the recording sheet 17 placed on the manual feed tray 29 with the size switch 34 and executes recording, the recording means B records according to the recording sheet size. Therefore, a sensor for detecting the size of the recording sheet 17 and an extra space for indicating the recording sheet size on the operation unit and a display device are not required, and the number of parts is reduced to downsize the device and reduce the cost. Can be planned.

Further, the size switch 34 is provided on the inner surface side of the manual feed tray 29 and on the back side of the tray open / close handle, and when the manual feed is performed, the open / close handle is found and the switch is operated when the manual feed tray 29 is tilted. Since 34 is in the visual position near the operation position, the operator does not forget to input the size.

[Open / close cover]

Further, in the recording apparatus, the recording cartridge 19 can be replaced. Therefore, in FIG. 2, the left side surface portion of the apparatus main body is configured as an opening / closing cover 35.

This will be described in detail.
The cover 35 is rotatably attached, and a release lever 38 is attached to a predetermined position of the cover 35 so as to rotate about a shaft 37 as shown in FIG. This release lever
The reference numeral 38 constitutes a release member for releasing the closed state of the opening / closing cover 35, and the chassis of the apparatus main body is provided at one end.
A hook portion 38a that engages with 39 is formed, and a release button portion 38b is formed at the other end. Then, when the hook portion 38a is locked to the chassis 39 by the bias of the torsion coil spring 40 attached to the rotating shaft 37, the open / close cover 35 is held in the closed state, and the release button portion 38b is First
When the hook 38a is pulled up in the direction of the arrow e in the drawing, the hooked portion 38a is unlocked and the opening / closing cover 35 can be opened. The release button portion 38b is configured to be exposed from the through hole 35a of the opening / closing cover 35 so that the operator can operate it.

The open / close cover 35 includes a manual feed tray 29 and a drive roller 23.
a, a transfer roller 16, a fixing roller 25a, a pressure roller 25b, and discharge rollers 26a, 26b are attached, and when the opening / closing cover 35 is opened as shown in FIG. It is configured to be separated from the main body of the device. Therefore, when the opening / closing cover 35 is opened, the recording cartridge 19 is exposed, and the cartridge 19 can be replaced.

[Relationship between open / close cover and recording cartridge]

Here, the relationship between the recording cartridge 19 and the opening / closing cover 35 will be described. As shown in FIGS. 2 and 4, locking projections 19a are provided on both side surfaces of the recording cartridge 19 so as to project therefrom. In the cassette housing portion 41 of the
Is formed with a locking groove 41a that can be slid into.
Therefore, by opening the opening / closing cover 35, holding the exposed grip 19b of the recording cartridge 19 and inserting / removing the cartridge 19, the recording cartridge 19 can be inserted into and removed from the apparatus main body.
Can be exchanged.

Further, the recording cartridge 19 is provided with a light-shielding shutter 19c for protecting the photosensitive drum 11 so as to be openable and closable around a shaft 19c ₁ . This light-blocking shutter 19c is an opening / closing cover 35.
When you bind, the photosensitive drum 11 and the transfer roller 16 are automatically opened.
When the open / close cover 35 is opened, they are automatically closed and the photosensitive drum 11 is shielded from light.

The interlocking structure of the light shielding shutter 19c and the opening / closing cover 35 is configured as shown in FIG. To explain this in the case of closing the open / close cover 35, the open / close cover 35 has a rod 43 pivotally supported by a shaft 42, and a rack 45 urged by a tension spring 44 contacts the tip of the rod 43. There is.
The rack 45 is supported by the apparatus main body by pins 46a and 46b. When the rod 43 slides in the direction of arrow f by closing the opening / closing cover 35, the rack 45 slides in the direction of arrow g and the pinion 47 meshed with the rack 45. Is rotated in the direction of arrow h, the pin 19c ₂ of the light-shielding shutter 19c mounted on the pinion arm 47a is lifted in the direction of arrow i, and the light-shielding shutter 19c is opened. When the open / close cover 35 is opened, the pin 19c ₂
The shutter 19c is closed by the biasing force of the torsion coil spring 19c ₄ provided on the rotation center shaft 19c ₃ of the light shielding shutter 19c.

[Relationship between open / close cover and recording sheet discharge tray]

Since the opening / closing of the light-shielding shutter 19c is linked with the opening / closing of the opening / closing cover 35 as described above, when the recording cartridge 19 is taken out, it is preferable that the opening / closing cover 35 is completely opened and the light-shielding shutter 19c is completely closed. . Therefore, in the present embodiment, the release lever 38, which serves as means for releasing the closed state of the open / close cover 35, cannot be operated unless the recording sheet discharge tray 27 attached to the open / close cover 35 is removed.

Specifically, as shown in FIG. 1, the recording sheet discharge tray
27 is configured to be removable by locking the locking projections 27a provided at both ends in the sheet width direction to the locking groove 48 near the recording sheet discharge port to attach to the apparatus main body, and releasing the locking. Further, one side of the discharge tray 27 covers the through hole 35a where the button portion 38b of the release lever 38 is exposed when the tray 27 is attached, and the release lever 38
Release prevention plate 27b which is a release prevention means that makes it impossible to operate
Are provided integrally. Therefore, unless the recording sheet discharge tray 27 is removed, the release lever 38 cannot be operated and the open / close cover 35 cannot be opened.

Open / close cover with the recording sheet discharge tray 27 attached
When opening 35, the discharge tray 27 is damaged by coming into contact with the installation floor surface and the tray 27 is an obstacle to completely open the open / close cover 35. At this time, the light shielding shutter 19c is completely closed. Since the photosensitive drum 11 may be exposed due to the absence thereof, in the present embodiment, the inconvenience does not occur because the opening / closing cover 38 cannot be opened unless the recording sheet discharge tray 27 is removed. Further, since the recording cartridge 19 is not forcibly taken out in the half-opened state, the recording cartridge 19 is not damaged.

[Space for taking out the recording cartridge]

Next, the space for taking out the recording cartridge 19 in the apparatus will be described. In this recording apparatus, the opening / closing cover 35 is opened and taken out as described above. 10 are provided. Therefore, the recording cartridge 19 is taken out by using the space below the document discharge tray 10 as shown in FIG. 4, and a unique projection space is required for taking out the recording cartridge 19 when installing the apparatus. do not do. Therefore, the installation space of the device can be reduced.

[Cassette drawer space]

Next, a drawing space of the cassette 20 accommodating the recording sheet 17 will be described.

As described above, the cassette 20 is accommodated in the lower part of the main body of the apparatus so as to be removable. As shown in FIG. 2, slide protrusions 20a are provided on both outer surfaces of the cassette container as shown in FIG. 2, and a cassette accommodating portion 49 having an opening on the side where the document discharge tray 10 is attached is formed in the lower portion of the apparatus. A guide groove 49a into which the slide protrusion 20a can be fitted and slid is formed on the inner wall of the accommodating portion 49.

Therefore, the cassette 20 slides from the left side in FIG.
It can be set by inserting 20a into the guide groove 49a and pushing it in, and when taking it out, it can be taken out by holding the handle 20b formed on the cassette 20 and pulling it out to the left side in FIG.

As described above, the cassette 20 is taken out below the document discharge tray 10 as shown in FIG. 6, and in this case as well, as in the case of taking out the recording cartridge 19, a unique cassette 20 is taken out. It is not necessary to provide a space, and the installation area of the device can be reduced.

[Bypass and discharge space for recording sheets]

Further, in the apparatus of this embodiment, the projection space for ejecting the original document is effectively used as a space for manually inserting and ejecting the recording sheet 17.

That is, as shown in FIG. 2, the recording sheet discharge tray 27 is arranged above the manual feed tray 29, and the document discharge tray 10 is arranged above the discharge tray 27. Therefore, the manual feed tray 29 and the recording sheet discharge tray 27 are in the projection space of the document discharge tray 10, and the space below the document discharge tray 10 is effectively used. Therefore, as in the case described above, space is not wasted, and the installation area of the device can be reduced.

[Arrangement of fixing means and document reading means]

Further, in the apparatus of the present embodiment, as shown in FIG. 2, the recording means 17 is configured to perform recording while conveying the recording sheet 17 from the lower side to the upper side, and the original reading means is provided above the fixing means. A is placed. At this time, the fixing roller 25a
A heat insulating unit is provided so that the heat of the heater 24 built in the optical disc does not damage optical components such as the light emitting member 8d, the lens 8e, and the photoelectric conversion element 8f of the reading unit A.

In the present embodiment, as the heat insulating means, a heat insulating member 50 such as felt is provided between the fixing roller 25a and the reading means A located above the fixing roller 25a, whereby the heat of the heater 24 is insulated against the reading means A, The heat is configured not to adversely affect the optical component.

By providing the heat insulating means as described above, the reading means A having an optical component can be arranged above the fixing means, and the lateral dimension of the apparatus can be reduced to reduce the installation area. Further, this makes it easy to dispose the document discharge tray 10 provided in the vicinity of the reading optical component above the recording sheet discharge tray 27 provided in the vicinity of the fixing means.

[Other Examples]

In the above-described embodiment, the release prevention plate 27b formed on the recording sheet discharge tray 27 covers the button portion 38b of the release lever 38, but as another embodiment, as shown in FIG. When the locking hole 38b ₁ is formed in the button portion 38b of the 38, and the locking projection 27c that can be fitted into the locking hole 38b ₁ is projected on the recording sheet discharge tray 27, and the tray 27 is attached to the opening / closing cover 35. locking protrusion 27c may be composed as fitted in the locking hole 38b ₁ to.

Even with the above configuration, it is possible to prevent the release lever 38 from being operated when the locking projection 27c is fitted in the locking hole 38b _1, and it is possible to prevent the opening / closing cover 35 from being opened with the tray 27 still attached. It is a thing.

Although the above-described embodiments have been described by taking a facsimile machine as an example, the present invention is naturally applicable to other recording devices such as a copying machine, and is applied to a recording device using recording means that does not use a photosensitive drum. It is also possible.

Further, in the above-described embodiment, the recording sheet discharge tray 27 is detachably attached to the opening / closing cover 35, and the release lever is attached to the tray 27.
Although the example in which the release prevention means of 38 is provided is shown, the opening / closing cover 35
The tray having the attachment release preventing means need not be limited to the recording sheet discharge tray, but may be a recording sheet supply tray or the like.

<Effects of the Invention> As described above, according to the present invention, since the release preventing means for preventing the operation of the cover releasing means when the tray is attached to the opening / closing cover is provided, the tray is attached to the opening / closing cover. It is possible to prevent the opening / closing cover from being opened carelessly.

Therefore, it is possible to prevent the tray from being damaged by opening the opening / closing cover, and to prevent the opening / closing cover from being in a half-opened state, and to prevent damage to the photosensitive drum or the recording cartridge, for example.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of a feeding and discharging portion of a recording sheet,
FIG. 2 is an explanatory view of a sectional configuration of the entire apparatus, FIG. 3 is an overall perspective view showing the appearance, and FIG. 4 is an explanatory view showing a state in which an opening / closing cover is opened.
FIG. 5 is an explanatory view of the interlocking mechanism of the opening / closing cover and the light-shielding shutter,
FIG. 6 is an explanatory view of a state in which the cassette is pulled out, and FIG. 7 is an explanatory view of another embodiment of the release preventing means of the release lever. A is a document reading unit, B is a recording unit, C is a recording sheet conveying unit, D is an operation panel, E is a telephone, F is a door, and G is a G.
Is a mounting table, 1 is a document mounting table, 2 is a side guide, 3 is a document, 4a is a preliminary conveyance roller, 4b is a pressure contact member, 5a is a separation roller, 5b is a pressure contact member, 6a is a conveyance roller, 6b is a pinch roller, 7 is a spring, 8a is a weight shaft, 8b is a pressing member, 8c is a reading glass, 8d is a light emitting member, 8e is a lens, 8f is a photoelectric conversion element, 9a is a carry-out roller, 9b is a pinch roller, and 10 is a document discharge tray. , 11 is a photosensitive drum, 12 is a charger, 13 is a laser oscillator, 14 is a polygon mirror, 15 is a developing unit, 16 is a transfer roller, 17 is a recording sheet, 18 is a cleaning member, 19 is a recording cartridge, and 19a is a lock. Ridge, 19b is a handle, 19c is a light-shielding shutter, 19c ₁ is a shaft, 19c ₂ is a pin, 19c ₃ is a shaft, 19c ₄ is a torsion coil spring, 20 is a cassette, 20a is a sliding protrusion, 20b is a handle, and 21 is a handle. Feed rollers, 22a and 22b are cassette carrying rollers, 23a and 23b are carrying rollers, 24 is a heater, and 25a is a fixing roller. Roller, 25b is a pressure roller, 26a and 26b are discharge rollers, 27
Is a recording sheet discharge tray, 27a is a locking projection, 27b is a release prevention plate, 27c is a locking projection, 28 is a manual feed opening, 29 is a manual feed tray, 29a is a fixed guide, 29b is a slide guide, 29c is a fitting recess, 30 is a shaft, 31 is a separating member, 32 is an auxiliary tray, 32a
Is a fitting convex portion, 33 is a hook-shaped locking member, 34 is a size switch, 35 is an opening / closing cover, 35a is a through hole, 36 is a rotating pin, 37
Is a shaft, 38 is a release lever, 38a is a hook part, 38b is a release button part, 38b ₁ is a locking hole, 39 is a chassis, 40 is a torsion coil spring, 41 is a cassette housing part, 41a is a locking groove, 42 is the axis, 4
3 is a rod, 44 is a tension spring, 45 is a rack, 46a and 46b are pins, 47 is a pinion, 47a is a pinion arm, 48 is a locking groove, 49 is a cassette housing, 49a is a guide groove, and 50 is a heat insulating member. Is.

Claims (2)

[Claims] 1. A device main body having recording means for recording an image on a recording sheet, an opening / closing cover that can be opened and closed with respect to the device main body, and a cover for releasing a closed state of the opening / closing cover with respect to the device main body. Release means, a tray which is attachable to and detachable from the opening / closing cover, and on which the recording sheet is placed, and release for preventing the operation of the cover releasing means when the tray is attached to the opening / closing cover. A recording device having: a prevention unit. 2. The recording apparatus according to claim 1, wherein the release prevention means is formed integrally with the tray and covers the cover release means.