JP2799439B2 - Sheet material peeling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peeling device for peeling a superposed sheet material by suction, and more particularly to a photosensitive device in which a latent image is formed after a document and a photosensitive material are overlaid and exposed. The present invention is suitable for use in an image forming apparatus configured to peel off a material from a document and develop the material.

[0002]

2. Description of the Related Art As an image forming apparatus, there is a method of forming an image by superposing two sheet materials. For example, there are a method in which an image is formed on an image receiving material by superposing an exposed photosensitive material and an image receiving material, and a method in which an image is formed on a photosensitive material by exposing a document and a photosensitive material.

In the latter method, for example, the photosensitive material is exposed while the original and the photosensitive material are overlapped on the peripheral surface of an exposure drum, and then the original and the photosensitive material are separated, and the photosensitive material is transported to a developing unit. It is configured to perform development. As a peeling device, there is a device configured to peel by suction in order to peel a document and a photosensitive material in a non-contact manner.

Hereinafter, an example of a conventional peeling apparatus will be described with reference to FIGS. FIG. 4 is a schematic side view showing a main part of the peeling device, and FIG. 5 is a schematic plan view. An exposure unit (not shown) is provided below the transport path R.
The document C and the photosensitive material A on which the latent image is formed are conveyed upward in a state where they are overlapped. The transport path R has a structure surrounded by intake chambers X and Y as shown in FIG.
At both ends of Y, intake fans 102 and 103 are provided. By driving the fans 102 and 103, air is sucked in the direction of arrow s through a number of intake holes 100 provided on the side surface of the conveyance path R, and the original C and the photosensitive material conveyed through the conveyance path R are sucked. A is sucked from both sides. In addition,
The fans 102 and 103 may use one fan in common.

[0005] As a result, the original C and the photosensitive material A are separated so as to be branched, and the conveyance is continued upward, so that a triangular shape is formed between the original C and the photosensitive material A. The exfoliated portion 54 formed at the bottom of the frame enters as if it were a wedge. The document C peeled off by the peeling section 54 is transported by a roller 104 or the like provided in the transport path R1, and the photosensitive material A is transported to a developing section (not shown) via the transport path R2.

[0006]

However, in the above-described peeling apparatus, the fans 102 and 103 are always driven to rotate, and the on / off control cannot be performed according to the operation state of the image forming apparatus. For this reason, when the supply error of the photosensitive material A occurs and only the document C is transported through the transport path R through the exposure unit, the intake chambers X and Y always inhale from both sides, and therefore, originally, The document C to be transported to the transport path R1 is not reliably transported to the transport path R1, and the separation unit 54
There was a case where a jam occurred in the vicinity.

Further, there is a case where the document C is erroneously entered on the side of the transport path R2 and is transported to the developing section.
That is, the conventional peeling device cannot perform peeling corresponding to the state of a sheet material such as a document or a photosensitive material.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a peeling device capable of performing peeling in accordance with the state of superposition of sheets such as a document and a photosensitive material. It is in.

[0009]

The object according to the solving the problem to means and operations for the present invention, in the configuration with the sheet peeling device to peel the two sheet materials superimposed by the intake, before <br/> SL two Air holes are provided on the side facing each of the sheet materials, and the sheet material is supplied in a single leaf or
Detects whether or not the two sheet materials have been supplied in a superposed state
When the sheet material is supplied as a single leaf, the other sheet is used.
To reduce the amount of intake air in the intake hole on the side opposite to the material.
This is achieved by the sheet material peeling device configured as described above.

In other words, when two sheets , for example, a document and a photosensitive material are conveyed in a superimposed manner, if only the document is conveyed due to some trouble, the original on the side to be conveyed to the original conveyance path Intake air and check whether the other side facing the photosensitive material
Stop their intake. As a result, the document is brought closer to the original transport path side, so that it is possible to prevent occurrence of a jam and transport to a different transport path.

The sheet material in the present invention includes recording paper, and the recording material may be of any recording system.
Examples of the recording paper include a diazo photosensitive material having a genus containing a microcapsule containing a diazonium salt on a support, a coupler and a base described in JP-A-59-190886. These form a latent image corresponding to the document by exposure, and are developed by heating.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an image forming apparatus to which the present invention is applied, FIG. 2 is a schematic plan view showing an example of a peeling device, and FIG. 3 is a circuit diagram of a control circuit for controlling peeling. Although the feature of the present embodiment lies in the peeling device shown in FIG. 2, for convenience of explanation, the configuration and operation of the image forming apparatus will be described, and then the peeling device will be described.

First, an image forming apparatus to which the peeling device of the present invention is applied will be described with reference to FIG. A diazo photosensitive material A is stored in the paper feed cassette 2. The image forming apparatus carries in and discharges the document C, and a document transport unit 32 for repeatedly circulating the same document C in the apparatus.
An exposing section 34 for exposing an image on the photosensitive material A superimposed on the original C, a separating section 54 for separating the original C from the photosensitive material A after exposure, and a developing section 36 for heating and developing the separated photosensitive material A; It has.

The document feeder 32 includes a hollow guide drum 38
A plurality of conveyor belts 40 are wound around in parallel on the peripheral surface, and another belt 42 stretched in opposition to the belt 40 is further provided. It is transported while pinched. The cassette 21 containing the photosensitive material A is loaded below the document feeder 32. The photosensitive material A in the cassette 2 is the original C to be conveyed.
The sheet is supplied to the overlapping section 44 one by one by the paper feed roller 30 at the same time as the original, and is overlapped with the original C. The photosensitive material A superimposed on the original C is transported by the transport roller 3
1 to the exposure unit 34.

The exposing section 34 is supported by an exposing drum 48 containing a fluorescent lamp 46, and the exposing drum 48 and four belt supporting rollers 50, and is wound around an approximately 3/4 area of the peripheral surface of the exposing drum 48. Belt 52. Then, the exposure drum 48 and the belt 52 are driven to rotate, and while the document C and the photosensitive material A, which are superposed between the exposure drum 48 and the belt 52, are nipped and conveyed, light from the exposure drum 48 A document image is projected on the photosensitive material A to form a latent image.

The exposed photosensitive material A and the original C are transported along a transport path R.
Is transported upward, and the front end is separated by the suction of the suction chambers X and Y, in other words, separated. Then, after the photosensitive material A is separated from the document C at the separation section 54, the photosensitive material A is transported to the developing section 36.

The developing section 36 has a halogen lamp 56 therein.
A heating drum 58 having a hollow cylindrical shape provided with
8 is provided with three transport rollers 60 that come into contact with the peripheral surface. The photosensitive material A is transferred between the transport rollers 60 by the heating drum 5.
8 is provided with a guide member 62 that is in contact with and guides the peripheral surface.

The photosensitive material A is heated and developed while being nipped and transported by the heating drum 58 and the transport roller 60, so that the latent image on the photosensitive material A is visualized. The developed photosensitive material A is discharged from the discharge port 64 and is accumulated on a stacker 70 provided on the main body case.

On the other hand, the original C peeled off from the photosensitive material A is discharged out of the apparatus by the conveyor belt 40 or circulates along the guide drum 38, and is used for copying in the same process as described above. The guide drum 38 is formed by dispersing holes between the transport belts in the area of the peripheral surface from the peeling section 54 to the document carry-in section, and further includes a fan 68 for sucking air in the guide drum 38. The separated document C is urged by the transport belt 40 by the negative pressure in the guide drum 38, comes into close contact with the transport belt 40, and is transported by a driving force.

Next, the peeling device will be described with reference to FIG. In the present embodiment, the intake air in the intake chamber Y is shut off as required, or the intake power in the intake chamber Y is reduced as compared with the intake power in the intake chamber X. The shutoff of the intake air in the intake chamber Y and the reduction of the intake force are automatically performed by detecting that the photosensitive material A has not been supplied. The configuration that performs the above operation is not limited, and various configurations as described below are possible.

The first is an intake hole 10 provided in the intake chamber Y.
A shielding plate 200 for closing or opening the 0 is provided, and is moved, for example, in the lateral direction in FIG. 2 by a driving means such as a plunger solenoid.

The shield plate 200 is provided with an intake hole 201 at a position where it can communicate with the intake hole 100. When the original C and the photosensitive material A are conveyed in a superimposed state, the shielding plate 20 is set so that the intake holes 100 and 201 are in a communicating state.
0 is positioned. In this case, the amount of intake air from the transport path R to each of the intake chambers X and Y is equal, and the above-described separation of the original C and the photosensitive material A is performed.

On the other hand, when the photosensitive material A is not supplied, the intake hole 100 is closed at a position where the intake hole 201 of the shielding plate 200 is not formed, in other words, at a plate surface between the intake holes 201. In this case, the suction of the suction chamber X is performed, but the suction of the suction chamber Y is not performed, and the document C is transported upward along the transport path R along the suction chamber X side. The document C is conveyed to the document conveying section 32 described with reference to FIG. 1, does not jam in the vicinity of the peeling section 54, and is not conveyed to the developing section 36.

The above operation can also be performed by the following configuration. That is, the positions U and V in FIG. 2 are shielded, and the intake chambers X and Y are separated. According to this configuration, the intake of the intake chamber X is performed by the fan 102, and the intake of the intake chamber Y is performed by the fan 103.

When the original C is supplied and the photosensitive material A is not supplied, the driving of the fan 103 is stopped, so that the intake of the intake chamber Y is stopped. However, by driving the fan 102 as it is, the suction of the suction chamber X is performed, so that the document C is conveyed to the document conveying unit 32 side in the same manner as described above, and a jam near the peeling unit 54 occurs.
Transport to the developing section 36 can be prevented beforehand.

Next, a method of driving the shielding plate 200 will be described with reference to FIG. There are various causes for driving the shield plate 200, and an example will be described below. The image forming apparatus according to the present embodiment automatically copies the photosensitive material A by simply inserting the original C and performs copying, and the user performs one copy of the photosensitive material A on the original C by copying. It is configured to perform manual copying.
The switching between automatic copying and manual copying is performed by a user by operating a predetermined switch.

In the case of manual copying, the original C is transferred to the Z shown in FIG.
The original C is inserted from the position, that is, the position where the original C is automatically supplied at the time of automatic copying, and the light transmittance of the original C is read. Z
In the vicinity of the position, a detecting means including a light emitting element 301 and a light receiving element 302 is provided, as shown in FIG. 3, so as to obtain a detection voltage V1 corresponding to the amount of transmitted light of the document C. At this time, the original C is held by the user,
In other words, it is insertion for obtaining copy data. That is, since the copying speed is set by the density of the original C, the optimum density,
Alternatively, this is an operation for obtaining copy data for performing copying at a designated density.

Here, the relationship between the inserted document C and the detection voltage V1 will be described. When the document C is not present, the detection voltage V1 is 3.5V, and when the document C is a transparent film, the detection voltage V1 is 3.2V. Similarly, the voltage is 0.7 V for PPC documents and 0.7 V for photosensitive paper. Note that the voltage level changes according to the light amount of the light emitting element 301 and the sensitivity of the light receiving element 302, and is not fixed.

Hereinafter, the circuit configuration will be described sequentially.
The converter 303 digitizes the detection voltage V1, and the digitized detection signal D1 is supplied to a control circuit 304 including a CPU. The control circuit 304 performs an operation on the detection signal D1 and data stored in the memory circuit 305 in advance, determines whether or not to drive the shield plate 200, and supplies a drive signal V2 to the drive circuit 306. Is configured. The drive circuit 306 drives the plunger solenoid or the like based on the drive signal V2 to operate the shield plate 200 as described above.

Next, the circuit operation will be described. When the original to be inserted is, for example, a transparent film, the detection voltage V1 is 3.
The voltage becomes 20 V, and a digital signal D1 corresponding to this voltage level is supplied from the A / D converter 303 to the control circuit 304. The control circuit 304 stores the data in the memory circuit 305, and sets the transport speed, the rotation speed of the exposure drum 48, the rotation speed of the heating and developing unit 36, and the like in order to perform optimal copying corresponding to the transparent film. The above circuit operation is
This is automatically performed by inserting a transparent film, and the copying machine enters a copy standby state.

Next, the user once pulls out the transparent film, overlaps with the photosensitive material A, and inserts it again. As a result, between the light emitting element 301 and the light receiving element 302,
The original C and the photosensitive material A are interposed as shown by the imaginary line in FIG. Therefore, the voltage level of the detection voltage V1 is
The level is lower than when a single transparent film is inserted. Based on this level difference, it is determined whether or not the photosensitive material A is superimposed, in other words, whether or not normal copying is performed. You.

In this embodiment, when the voltage drops by 0.5 V or more compared to the case where only the original is inserted, it is determined that the photosensitive material A is properly superimposed. ing.

In this case, the voltage level of detection voltage V1 drops to 2.7 V or less, and digital signal D1 corresponding to this voltage level is supplied to control circuit 304. The control circuit 304 stores the data stored in the memory circuit 305,
That is, voltage data corresponding to the transparent film is read out, and a comparison operation is performed with the data transmitted with the second insertion. When the photosensitive materials A are properly superimposed, the plunger is not driven by the control signal V2, and the suction in the s direction is performed by the suction chambers X and Y. That is, when the document C and the photosensitive material A are properly superimposed, the above-described image formation, in other words, image copying is performed.

Next, as an example of jam prevention, a description will be given of a circuit operation in a case where a user inserts a document C and reads data, and then re-inserts the photosensitive material A without overlapping the photosensitive material A. In this case, the voltage level of the detection voltage V1 does not change between the first time and the second time, and the control circuit 304 performs a comparison operation to determine that the photosensitive material A is not overlapped.

Then, the plunger solenoid is driven by the control signal V2 to stop the suction of the suction chamber Y so that the document C does not jam near the peeling portion 54. As a result, the document C is conveyed while being sucked by the suction chamber X,
The sheet is transported from the peeling section 54 to the transport path R1 side and discharged.

As described above, in the present embodiment, when the photosensitive material A does not overlap, the jam of the document C can be reliably prevented. In the above-described embodiment, the circuit operation when a transparent film is inserted as the original C is described. However, even when the original C is a PPC original or photosensitive paper, the same determination operation as described above is performed, and Prevents jams.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments. In the above embodiment, when the photosensitive material A is not supplied, the suction chamber Y
Although the intake is stopped, the intake power may be reduced. In this case, in the first example, the intake hole 201 of the shielding plate 200 may have a small area, and in the second example, the fan 103 may be controlled to rotate at a low speed. When the photosensitive material A is not supplied, the intake chamber Y
A configuration may be adopted in which air is discharged so as to blow air toward the transport path R.

[0038]

The sheet peeling apparatus according to the present invention is a device for sucking a sheet in a superposed state, that is, when there is only one sheet when the laminated sheet is peeled. One of them is configured to stop or reduce the suction and suck one sheet material to the original peeling side.

Accordingly, one sheet material is not transported in the transport direction of another sheet material, and the peeling is performed in accordance with the condition of the sheet material, and the reliability of the peeling is improved. .

The above-mentioned peeling device is suitable for an image forming apparatus configured to peel a photosensitive material after superimposing a photosensitive material on an original and then exposing the photosensitive material to develop the photosensitive material. Even when the document is not supplied, it is possible to reliably prevent the occurrence of a document jam.

In many cases, there is only one original, such as a handwritten original, and when the original is damaged by a jam, there is a situation in which the original is newly created. However, by applying the present invention, Such an undesirable accident can be prevented beforehand, and the reliability of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an image forming apparatus showing an embodiment of the present invention.

FIG. 2 is a schematic plan view of a main part of a peeling device showing an embodiment of the present invention.

FIG. 3 is a circuit diagram illustrating a mode of driving of a peeling device and prevention of jam.

FIG. 4 is a side view of a main part showing an example of a conventional peeling device.

FIG. 5 is a plan view of a main part showing an example of a conventional peeling device.

[Explanation of symbols]

 Reference Signs List 2 photosensitive material cassette 32 original transport section 34 exposure section 36 developing section 44 overlapping section 46 fluorescent lamp 48 exposure drum 50 belt support roller 100, 201 intake hole 102, 103 fan 200 shielding plate 301 light emitting element 302 light receiving element 303 A / D converter 304 Control circuit 305 Memory circuit 306 Drive circuit A Photosensitive material C Original X, Y Intake chamber U, V Shield position s Intake direction V1 Detection voltage D1 Digital detection signal V2 Control signal

Claims (1)

(57) [Claims] In the sheet material separating device configured so as to peel off the 1. A two sheet materials superimposed by the intake, provided with a suction hole on a side facing to each of the two sheet materials, the sheet material Was supplied as a single leaf
Or whether the two sheet materials are supplied in an overlapping manner
And if the sheet material is supplied in a single leaf, the other
To reduce the amount of intake air in the intake hole on the side facing the sheet material of
Sheet material peeling device configured as described above.