JPH0588422A - Sheet carrying device - Google Patents

Abstract

PURPOSE:To perform the opening and closing operations of a device body and an option device without separately conducting the operations, for example, at the time of jam treatment. CONSTITUTION:A device body 10 and a double recording unit (option device) 15 have opening and closing cover members 23, 28 having moving property in opening directions, respectively, and lock members 24, 31 for holding the opening and closing cover members 23, 28 in respective closing positions are provided in such a manner as to be externally operable. A lock releasing member 41 for operating the lock member 31 of the double recording unit 15 is provided in such a manner as to be externally operable. When the double recording unit 15 is mounted on the device body 10, the lock releasing member 41 and the lock member 24 of the device body 10 are connected to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device such as a printer, a copying machine or a facsimile for recording a sheet such as a sheet of paper or an OHP sheet by printing, copying, transferring or printing. More specifically, the present invention relates to a sheet conveying device including, as an optional device, a double-sided recording unit that enables double-sided recording by feeding the sheet again to the apparatus main body after recording on one side of the sheet.

[0002]

2. Description of the Related Art Conventionally, for example, among sheet conveying apparatuses, there is an apparatus that downsizes the entire apparatus and uses such a downsized apparatus to record on a large size sheet. In such a sheet conveying device, before the trailing edge of the sheet after the image transfer passes through a fixing device or the like in the main body of the apparatus, the leading edge of the sheet enters an optional device such as a double-sided recording unit, and the main body of the device and the option are transferred. The sheet is conveyed across both the apparatus and the apparatus. Therefore, when the sheet is jammed, it is necessary to open both the device body and the optional device to perform the jam processing.

By the way, in the conventional sheet conveying apparatus of this type, each of the apparatus main body and the optional apparatus is provided with each opening / closing cover member having a habit of moving in the opening direction, and they are individually opened / closed.

[0004]

Therefore, in the conventional sheet conveying apparatus, for example, at the time of jam processing, the opening / closing cover members of the apparatus main body and the optional apparatus must be individually opened / closed, which is troublesome. It was

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable opening / closing operations without individually operating the respective opening / closing cover members of the apparatus main body and the optional device during jam processing.

[0006]

Therefore, in the invention described in claim 1, for example, as shown in the following illustrated embodiments, an optional device such as a double-sided recording unit 15 is detachably attached to the device main body 10, and those devices are attached. In a sheet conveying device, which includes both the main body 10 and the optional device, an opening / closing cover member 23/28 having a habit of moving in the opening direction and a locking member 24/31 for holding the opening / closing cover member 23/28 in a closed position, The lock release operation for releasing the lock of the lock members 24 and 31 is made to interlock with the apparatus main body 10 and the option device.

According to the invention described in claim 2, for example, as shown in the following illustrated embodiment, in the sheet conveying apparatus according to claim 1, the lock member 24 of the apparatus main body 10 can be unlocked by an external operation. On the other hand, a lock releasing member 41 for releasing the lock of the lock member 31 of the optional device is provided so as to be operable externally, and the device body 10 is provided.
When the optional device is attached to, the lock release member 41 and the lock member 24 of the device body 10 are connected to each other.

According to a third aspect of the invention, for example, as shown in the following illustrated embodiment, in the sheet conveying apparatus according to the first aspect, the optional device is the double-sided recording unit 1.
It is characterized by being 9.

[0009]

According to the first aspect of the invention, when one of the lock members 24 and 31 is unlocked, for example, during jam handling, the other lock member 24 or 31 is also unlocked in conjunction with the lock operation. The main body 10 and the opening / closing cover members 23 and 28 of the optional device are opened in association with each other.

According to the second aspect of the present invention, when the unlocking member 41 of the option device is externally operated, the lock member 24 of the device main body 10 is operated in conjunction with the external operation to lock the lock member 24. To release.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a perspective view showing a laser printer according to an embodiment of the present invention, in which a double-sided recording unit as an optional device is separated from the main body of the device. Reference numeral 10 in the figure denotes the apparatus main body. Although not shown, the apparatus main body 10 includes a sheet supply unit, an image forming unit that records on a sheet by repeating an electrophotographic process of charging, writing, developing, transferring, fixing, and cleaning, and an image forming unit. And a sheet discharging unit that discharges the recorded sheet. The sheet discharging section opens a sheet discharging port 11 toward the front side on the right side in the figure in the upper part on the rear side on the left side in the figure of the apparatus body 10. The paper discharge port 11 is provided with a paper discharge roller 12.

A double-sided recording unit 15, which is an optional device, is detachably provided on the apparatus main body 10 as shown in the drawing. The double-sided recording unit 15 is connected to the sheet discharge port 11 of the apparatus main body 10 and includes a reversing conveyance path and a re-feeding path 16 which are not shown. Paper discharge port 17 of the reverse conveyance path
A paper discharge roller 18 is provided on the paper. Incidentally, the re-feeding path 16
Through an unillustrated re-feeding port provided in the apparatus main body 10 to an image forming unit (not shown) in the apparatus main body 10. Reference numeral 19 in the figure denotes a switchback roller that switches back the sheet and sends it to the image forming unit.

After recording on one side of the sheet in the image forming section, the sheet is ejected from the sheet ejecting section by the sheet ejection roller 1.
In step 2, the sheet is fed to the reversing conveyance path, and is ejected to the stacking section 20 by the sheet ejection roller 18 in the reversing conveyance path to be stacked. On the other hand, the sheet after single-sided recording is switched by a switching claw (not shown) to be fed to the re-feeding path 16, switched back by the switchback roller 19, and then the apparatus main body 10 again.
The paper is fed to the image forming unit inside.

By the way, in the upper part of the apparatus main body 10,
An opening / closing cover member 23 is provided as illustrated. The opening / closing cover member 23 has a habit of moving in the opening direction, and is provided so as to be openable / closable about a shaft (not shown) as a fulcrum. A lock member 24 is arranged on the left side (front side in the figure) of the opening / closing cover member 23. As shown in FIG. 1, the lock member 24 is rotatably provided on the left and right side plates 23a of the opening / closing cover member 23 by a lock shaft 25. An engaging claw 24a is provided at one end of the lock member 24. The engaging claw 24a is the device main body 1
It is hooked on a lock pin 26 which is appropriately provided in the position 0. The other end 24b of the lock member 24 has the opening / closing cover member 2
It extends upward through the window hole 23b of No. 3 and is provided in a flat plate shape so that it can be operated externally. The lock member 24 is urged to the illustrated lock position by an urging member (not shown).

The double-sided recording unit 15 is also shown in FIG.
An opening / closing cover member 28 is provided as shown in FIG. The open / close cover member 28 has a habit of moving in the opening direction, and is provided so as to be openable / closable about a shaft (not shown) as a fulcrum. At the inner front part of the double-sided recording unit 15, a lock shaft 30 is provided so as to span between left and right side plates 29 as shown in FIGS. A pair of left and right lock members 31 and 32 for holding the open / close cover member 28 in the closed position are provided at both ends of the lock shaft 30. Each of the lock members 31 and 32 is provided with engaging claws 31a and 32a at the upper end thereof, and is provided with a slanted portion 3 on the lower right in the drawing at the lower portion.
1b and 32b, and the engaging claws 31a and 32a are hooked on the lock pins 33 provided on the opening / closing cover member 28, respectively. Further, one end of the tension spring 34 is hooked on the lower end of the one lock member 31. The tension spring 3
4, the other end is hooked on a protrusion 35a provided on the bottom plate 35 of the double-sided recording unit 15 to urge the lock member 31 to the lock position.

A guide member 40 is arranged outside the one lock member 31. The guide member 40
Is a columnar shape having a U-shaped cross section, and the lower end 40a is bent outward and fixed to the bottom plate 35 of the double-sided recording unit 15 and arranged vertically. A lock releasing member 41 is provided inside the guide member 40 so as to be vertically movable.

The unlocking member 41 is the guide member 4
Similarly to 0, it has a U-shaped cross section, and has a pair of upper and lower guide holes 41b on the left and right side surfaces 41a. A horizontal shaft 42 extending between the left and right side surfaces 40b of the guide member 40 is passed through the guide holes 41b. In addition, a convex portion 41c is provided on the side surface 41a on one side of the unlocking member 41 so as to project toward the lock member 31, and a roller 4 is provided at the tip thereof.
3 is rotatably provided on a shaft 44. The roller 43 is in contact with the inclined portion 31b of the lock member 31. The lower end of the unlocking member 41 has the double-sided recording unit 15
Through the bottom hole 35c of the lock member 24, and the hemispherical member 45 is attached to the lock member 24 so as to contact the upper end 24b of the lock member 24 and connect with the lock member 24. On the other hand, the lock release member 4
A button member 46 is attached to the upper end portion of 1. The upper end portion of the button member 46 projects through the window hole 28a of the opening / closing cover member 28 to the outside so that it can be operated externally.

However, when a sheet jam occurs in the apparatus main body 10 or the double-sided recording unit 15 during sheet conveyance, the button member 4 is moved in the direction of arrow A as shown in FIG.
When 6 is pushed in, the lock releasing member 41 is moved downward by being guided by the guide member 40 via the button member 46. At that time, the inclined portion 3 of the lock member 31 is rotated by the roller 43.
Press 1b. Therefore, the lock member 31 rotates in the counterclockwise direction of the arrow B around the lock shaft 30 against the tension spring 34. Then, from the lock pin 33 to the engaging claw 3
1a is disengaged to unlock the lock member 31. The open / close cover member 28 of the double-sided recording unit 15 is then formed.
Is opened by the movement habit.

When the lock releasing member 41 is moved, at the same time, the spherical member 45 of the lock releasing member 41 is moved.
Then, the lock member 24 of the apparatus body 10 is pushed down. Therefore, the lock member 24 rotates in the clockwise direction of the arrow C about the lock shaft 25. Then, the engaging claw 24a is disengaged from the lock pin 26 to unlock the lock member 24. Then, the open / close cover member 28 of the apparatus main body 10 opens while lifting the double-sided recording unit 15 due to the movement habit. That is, the lock member 24 in the apparatus main body 10 is unlocked in conjunction with the unlocking operation of unlocking the lock member 31 in the double-sided recording unit 15.

Then, the opening / closing cover member 28 is opened to remove the jam in the double-sided recording unit 15, and the opening / closing cover member 23 is opened to open the apparatus main body 1.
Jam processing within 0 is performed.

After the jam processing, the opening / closing cover member 23.
When 28 is closed, the lock pin 26 abuts on the engagement claw 24a of the lock member 24, and the lock pin 33 abuts on the engagement claw 31a of the lock member 31. Therefore, when the open / close cover members 23, 28 are further pushed down against the movement habit, the lock member 24 rotates counterclockwise and escapes, and then the engaging claw 24a engages with the lock pin 26. Then lock again. At the same time, at the same time, after the lock member 31 rotates clockwise and escapes, the engaging claw 31a engages with the lock pin 33 and locks again.

[0023]

Therefore, according to the present invention, the lock of the other opening / closing cover member is also released in conjunction with the unlocking operation of the opening / closing cover member of either the device main body or the optional device. It is possible to save the trouble of individually opening and closing the open / close cover members of the option device, and it is possible to easily perform jam processing, for example.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a locked state of an apparatus main body, an opening / closing cover member thereof, a double-sided recording unit and an opening / closing cover member thereof in a laser printer according to an embodiment of the present invention.

FIG. 2 is a perspective view of a part of the double-sided recording device.

FIG. 3 is a state diagram in which a locked state of the apparatus main body and its opening / closing cover member is released in association with an unlocking operation of the double-sided recording device and its opening / closing cover member.

FIG. 4 is a perspective view of a laser printer showing the double-sided recording unit separated from the apparatus main body.

[Explanation of symbols]

 10 Device Main Body 15 Double-sided Recording Unit (Optional Device) 23 Device Main Body Opening / Closing Cover Member 24 Device Main Body Locking Member 28 Double-sided Recording Unit Opening / Covering Member 31 Double-sided Recording Unit Locking Member

Claims (3)

[Claims] 1. An open / close cover member having detachable attachment to an apparatus main body and having a habit of moving in an opening direction, and a lock member for holding the open / close cover member in a closed position. A sheet transporting device including: a sheet transporting device, wherein an unlocking operation for unlocking the lock member is interlocked between the device body and the option device. 2. The lock member of the apparatus main body is provided so as to be unlockable by an external operation, while the lock release member for unlocking the lock member of the optional device is externally provided, and the device main body is provided with the lock member. The sheet conveying apparatus according to claim 1, wherein the lock releasing member and the lock member of the apparatus main body are connected to each other when an optional device is attached. 3. The sheet conveying device according to claim 1, wherein the optional device is a double-sided recording unit.