JPH0720672Y2 - Image forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus capable of transferring at least an A-1 type large size sheet.

(B) Conventional technology Conventionally, in this type of large-sized copying machine, a box-shaped tray for receiving transfer paper is provided under the discharge port on the front of the copying machine main body, whereby transfer paper is stocked vertically in the tray. Was there. For example, it is possible to stock large size sheets by using a tray of the type disclosed in Japanese Utility Model Laid-Open No. 59-162037.

(C) Problems to be solved by the invention However, transfer paper of A-1 type, which has weak stiffness, may be stocked in a bent state in the tray. Moreover, when a large amount of transfer paper is stocked, it is necessary to widen the space of the tray, so it is more difficult to avoid bending of the transfer paper.

In addition, A-2 type medium size transfer paper, A-3, A-
With the four types of small-sized transfer paper, these are stuck in the tray and it is difficult to take them out.

(D) Means and Actions for Solving the Problems The present invention is directed to an image forming apparatus main body and a desk-shaped side on which the image forming apparatus main body is placed on the upper surface and which corresponds to the transfer sheet discharge port of the image forming apparatus main body. A transfer paper storage unit having a transfer paper storage space for storing large and medium-sized transfer papers through an entrance provided in the transfer paper storage unit, and a transfer paper storage unit having an inclined surface path is provided in the transfer paper storage space. A protruding member is provided in the vicinity of the transfer paper storage section in the vicinity, so that medium-sized transfer paper can be slid down from the entrance through the slope path and stored at the stop portion, and it can be naturally dropped from the transfer paper discharge opening. The medium-sized transfer paper can be received by the projecting member on the extension line of the inclined surface path and guided to the entrance, and the rear end of the large-sized transfer paper can be drooped from the projecting member and stored.

In addition, if a drawer member that stores a small size transfer paper is provided in the paper storage table directly above the transfer paper storage space so that it can be pulled out toward the entrance side, the drawer member can be pulled out to the front side to allow the transfer paper to exit from the transfer paper outlet. Can receive and store size transfer paper.

(E) Embodiments The present invention will be described in detail based on the embodiments shown in the drawings.
However, the present invention is not limited to this.

1 and 2, the copying machine is a machine body 1 and a desk shape,
The machine body 1 is placed on the upper surface, and a large (A-1 type) / medium (A-2 type) size transfer paper 4 is provided through an inlet 3 provided on the side corresponding to the transfer paper discharge port 2 of the machine body 1. And a paper storage table 6 having a transfer paper storage space R for storing 5, and in the transfer paper storage space R, α =
The inclined surface path 7 is formed with an inclination angle of 25 °, whereby the transfer paper guided to the entrance 3 is slid down on the inclined surface path 7 to reach the abutting stop portion 7a, and the medium size transfer is performed. The transfer paper storage portion 8 having a size capable of storing the paper 5 and the transfer paper storage portion 8 near the inlet 3 are disposed so as to project in the extension direction of the storage portion, and thereby from the transfer paper discharge port 2 Projections that can receive the front ends 4a and 5a of the large and medium size transfer papers 4 and 5 that are naturally dropped and guide them to the entrance 3 and store the rear end 4b of the large size transfer paper 4 in a suspended state. It is provided on the upper surface of the member 9 and the paper storage table 6 directly above the transfer paper storage space R so that it can be pulled out in the inlet side direction, whereby it is naturally dropped from the transfer paper outlet 2 (A-3, A-4 type). ) Receiving and storing transfer paper of size (not shown) And a drawer member 10 mainly. Reference numeral 11 denotes a paper pressing member arranged in the storage space R, which is fixed to the upper surface of the storage table 6 and presses the transfer paper by its own weight.

Further, a stock tray 50 having a stock opening 6a covered with an openable / closable lid 49 is provided immediately below the storage space R of the paper storage table 6 along the inclined road and directly below the entrance 3. , This stocks large, medium and small size paper. This lid 49 is provided with a groove for a cutter blade on the back surface.
In the state in which is opened, on the back surface 49a, the roll paper 52a pulled out from the lower roll 52 can be set to a predetermined size and cut by running a cutter blade.

Further, a photosensitive drum 12 is rotatably provided in the machine body 1, and a well-known main charging device 13, an exposure lamp 14a and a lens 14b are sequentially arranged around the photosensitive drum 12 in the rotation direction thereof. An exposure unit 15 for the original image by the optical system 14 including
Image forming means such as a developing device 16, a transfer device 17, a separating device 18 and a cleaning device 19 are provided.

On the front side (right side in FIG. 1) inside the machine body 1, the drum
A fixing device 20 for fixing the image on the paper transferred and separated from 12 is provided, and a discharge roller pair 21, a paper discharge opening 22, and a transfer communicating with this are provided on the downstream side of the fixing device 20. Each paper outlet is provided.

A paper (transfer paper) insertion portion 24 is provided in the lower front portion of the machine body 1, and the paper feed roller 2 is provided inside the insertion portion 24.
5, paper detection switches 26a, 26b, upper roller 27a and lower roller 2
Registration roller pair 27 and transport roller pair 28 consisting of 7b
Is provided. Registration roller pair 27 and transport roller pair
The paper feed passage 29 between the 28 is formed in a U-shape so that the passage on the downstream side of the pair of conveying rollers 28 is open toward the transfer device 17. Further, jam detection switches 30a and 30b are provided on the downstream side of the photosensitive drum 12 and the downstream side of the fixing device 20.

An insertion opening 31 for inserting a document is provided on the upper surface of the machine body 1,
Behind the insertion port 31, a pair of document feed rollers 32, 33, a contact glass 34, and a document discharge tray (not shown) are provided. Further, on the upstream side and the downstream side of the document feeding roller pair 32, paper detection switches 36 and 37 for timing of document transportation are provided.

Next, the paper feeding structure of this apparatus will be described. A large paper feed cassette 38 having substantially the same size as the machine body 1 in the front-rear direction is provided in the lower part of the machine body 1, and a lower guide plate is provided above the paper feed cassette 38 and at a position facing the paper insertion portion 24. 39 are arranged. The large-sized paper feed cassette 38 has a U-turn passage 40 for reversing the stored paper and an outlet 41 for the paper, and serves as a mechanism for feeding the paper along the U-turn passage 40. 42a, 42b, etc. are provided.

In the paper insertion section 24, an upper guide plate 43 is provided above the lower guide plate 39 so as to be openable and closable. This upper guide plate 43
Is attached to the machine body 1 so as to be rotatable about a shaft 44. When the upper guide plate 43 is closed, the upper guide plate 43 and the lower guide plate 39 are used to feed sheets when feeding cassettes. A transport passage is formed (not shown). Further, when the upper guide plate 43 is opened, the lower guide plate 39 is exposed upward, and the lower guide plate 39 is used as a manual feed table for manual feeding.

Further, on the machine body 1 side, a limit switch 45 is provided at a position where the upper surface of the upper guide plate 43 contacts with the upper guide plate 43 opened.
Is turned on by the contact of the upper guide plate 43. This limit switch 45 is connected to the control device (not shown) of the main body, and the limit switch 45
Is turned on, the mode is switched to the manual sheet feeding mode, and if the limit switch 45 is off, the mode is switched to the cassette sheet feeding mode.

Since this embodiment has the above-described structure, the large and small size transfer papers discharged from the discharge port 2 are slid along the inclined surface path 7 after their front ends 4a and 5a are received by the projecting member 9. Then, the front end is brought into contact with the stop portion 7a and stored in the storage portion 8.

At this time, the medium-sized transfer paper 5 is placed on the inclined surface path 7 and the protruding member 9, and the large-sized transfer paper 4 is further stored by the rear end 4b thereof protruding from the protruding member 9 and hanging down. .

Further, the paper pressing member 11 makes it possible to stock the transfer paper that has entered the storage space R in a more stable state and to stock a large amount.

On the other hand, the small-sized transfer paper is stored in the drawer member 10 while being prevented from falling into the transfer paper storage space R by drawing the drawer member 10 to the front. In this way, even in a large-sized copying machine, it is possible to easily stock small-sized transfer papers and to stock them with a simple structure.

As the transfer paper storage space in the present invention, the inclined surface path has an inclination angle α of preferably 20 ° <α <30 ° with respect to a horizontal plane, and the transfer paper storage space is directed upward from the abutting portion of the transfer paper storage portion. More preferred is a sloping road, which is inclined and is set to α = 25 °. The length L of the slope road is A-2.
Slightly shorter than the short side of type A paper, and longer than 1/2 of the short side of A-1 type paper. The width W is set to be slightly longer than the long side of the A ₁ type paper, and 28 cm <L <32 cm is preferable, while 100 cm <W <110 cm is preferable.

Furthermore, the sloped road preferably has a smooth finished surface.

The projecting member in this invention has, for example, guide grooves on both side surfaces, and is fitted to the tip end of the inclined surface path by being engaged with the projecting parts at both ends of the inlet. That is, it is preferable that the inclination angle is set to be the same as that of the inclined road. The protrusion length l is a length capable of receiving the A-1 or A-2 type transfer sheet that is naturally dropped from the transfer sheet discharge port, specifically,
10 cm <l <15 cm is preferred. Furthermore, it is preferable that the protruding member has a finished surface with a smooth upper surface.

In this embodiment, the protruding member 9 is attached to the inlet 3. However, the protruding member 9 may be configured to be expandable / contractible in the transfer paper storage space R or may be detachable from the inlet 3. By doing this, when not in use, the protruding member can be contracted into the entrance,
It can be removed from the storage table so that it does not project, improving the safety of the operator.

(F) Effect of the device According to this device, the main body of the image forming apparatus and the desk shape
A paper storage that has a transfer paper storage space in which the image forming apparatus main body is placed on the upper surface and large and medium size transfer paper is stored through an inlet provided on the side corresponding to the transfer paper discharge outlet of the image forming apparatus main body. The transfer paper storage part, which is composed of a table and has an inclined surface path in the transfer paper storage space, is provided with a protruding member at the tip of the transfer paper storage part in the vicinity of the entrance. It can be slid down from the inlet and stored, and large and medium size transfer paper that naturally falls from the transfer paper outlet is received by the protruding member on the extension line of the inclined surface path and guided to the inlet, and also large size The trailing edge of the transfer paper can be hung down from the protruding member and stored, which makes it inconvenient for the transfer paper to be folded and stocked inside the tray, which was previously stocked vertically in a box-shaped tray. With the avoidance can be of the transfer paper stock failure can be prevented, there is an effect that can be achieved a large amount stock of the transfer paper in large sizes.

In addition, even in the image forming apparatus for large-sized transfer paper,
Easy to stock small size transfer paper,
With a simple structure, it is possible to stock small-sized transfer paper and to take it easily.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the structure of an embodiment of the present invention, and FIG. 2 is a front view of the embodiment. 1 ... Machine, 2 ... Ejection port, 3 ... Inlet, 4 ... Large size transfer paper, 5 ... Medium size transfer paper, 4a, 5a ... Large
Front end of small size transfer paper, 4b …… Rear end of large size transfer paper, 6 …… Paper storage table, 7 …… Slope surface path, 7a …… Stop portion, 8 …… Transfer paper storage section, 9 …… Projecting member, 10 ……
Drawer member, R ... Transfer paper storage space.

Claims (2)

[Scope of utility model registration request] 1. A main body of an image forming apparatus and a desk-like body on which the main body of the image forming apparatus is placed, and a large / medium size is provided through an inlet provided on a side of the main body of the image forming apparatus corresponding to a transfer sheet discharge outlet. A transfer paper storage space for storing transfer paper of a size, and an inclined surface path is formed in the transfer paper storage space at a predetermined angle with respect to the horizontal plane, thereby guiding the entrance. The transferred transfer paper is slid down on the inclined surface path, hits the locking portion, and has a transfer paper storage section having a size capable of storing substantially medium-sized transfer paper, and a transfer paper storage section near the entrance. The front end of large and medium-sized transfer paper, which is arranged at the tip of the transfer paper so as to project in the extension direction of the storage part and is naturally dropped from the transfer paper discharge port, receives the entire front end and sequentially guides the whole to the entrance. For transfer paper, hang the trailing edge An image forming apparatus including a protruding member that can be stored in a state. 2. A main body of the image forming apparatus and a desk-like body on which the main body of the image forming apparatus is placed, and a large / medium size is provided through an inlet provided on a side of the main body of the image forming apparatus corresponding to a transfer sheet discharge outlet. A transfer paper storage space for storing transfer paper of a size, and an inclined surface path is formed in the transfer paper storage space at a predetermined angle with respect to the horizontal plane, thereby guiding the entrance. The transferred transfer paper is slid down on the inclined surface path, hits the stop portion, and has a transfer paper storage part having a size capable of storing substantially medium-sized transfer paper, and the tip of the transfer paper storage part near the inlet. Is arranged so as to project in the extension direction of the storage section, and thereby receives the front ends of large and medium-sized transfer sheets that naturally fall from the transfer sheet discharge port, and guides the whole to the inlet in sequence and transfers large-sized sheets. On paper, hang the trailing edge The protruding member that can be stored in the state and the paper storage table directly above the transfer paper storage space are provided so as to be pulled out toward the above-mentioned inlet side, and thereby receive the small size transfer paper that naturally drops from the transfer paper discharge port. An image forming apparatus provided with a drawer member that can be stored.