JPH021296Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is a sheet original recycling device suitable for repeatedly copying the same original by providing an original recycling conveyance path in the original photographing unit of an electrophotographic copying machine or the like. Regarding.

<Prior art> Generally, a sheet original recycling device is used in large-sized copying machines in which it is difficult to move the optical system for scanning exposure as a document capturing method for electrophotographic copying machines, and is disclosed in USP.4335954. and other conveyance devices are installed in the document photographing section.

<Problems to be solved by the invention> That is, in the conventional sheet document recycling apparatus described above, the recycling conveyance path for repeatedly conveying the same document is not formed to be divisible. When paper feeding failure occurs, maintenance work requires time and effort to disassemble the recycling device, or jammed sheet documents are easily damaged when taken out of the device.

The present invention was developed in view of these circumstances.The purpose of this invention is to form the recycling conveyance path so that it can be divided into sections, so that sheet originals can be easily taken out of the machine in the event of paper feeding errors, and maintenance can be easily performed. An object of the present invention is to provide a sheet document recycling device for an electrophotographic copying machine or the like, which can be easily operated.

<Means for Solving the Problems> In order to achieve the above object, the present invention has a front conveyance section and a rear conveyance section facing each other to form a set of divisible recycling conveyance paths. In each of the rear conveyance sections, an endless belt for conveying the sheet material is stretched between a drive roller, a sheet suction reversing roller, an idle roller, and a tension roller, and the tension roller is connected to a drive roller and an idle roller. An endless belt is installed in this concave bent part so as to be stretched in a concave shape between them, and by arranging the concave parts of the front side conveyance part and the rear side conveyance part to face each other, the concave part is removed. The present invention is a sheet document recycling device in an electrophotographic copying machine or the like, in which the recycling conveyance path is formed and the recycling conveyance path is disposed opposite to a document photographing section.

<Function> The recessed portion of the front conveyance portion and the recessed portion of the rear conveyance portion are arranged to face each other, and neither of these recessed portions constitutes a recycling conveyance path, but is exclusively used as a tension adjustment portion of the endless belt. , and a recycle conveyance path is constructed excluding this recess, and the recycle conveyance path is formed so as to be able to be divided into a front side and a rear side by this recess.

<Embodiment> An embodiment of a sheet original recycling device in an electrophotographic copying machine according to the present invention will be described below with reference to the drawings.

FIG. 5 is a perspective view of a large-sized electrophotographic copying machine suitable for applying the present invention, and FIG.
FIG.

In FIG. 5, reference numeral 50 is an operation panel of the electrophotographic copying machine, 100 is a document scanning section, and 200 is a copy image recording section. In the document scanning section 100, as shown in FIG.
While being conveyed by the document illumination device 104, the document is illuminated by the document illumination device 104.

The pattern of the original 101 is exposed to a slit image on a photosensitive drum provided in the recording section 200 by an imaging optical system 107 consisting of a pair of mirrors 105 and a lens 106 to form a latent image, which is then developed by a developer (not shown). The visualized toner image is visualized by the device and transferred onto copy paper fed to a transfer section, thereby recording a copy image. FIG. 4 shows a sheet original recycling device 11 according to the present invention for repeatedly copying using the same sheet original 101.
0 is disposed facing the document photographing section 12.
This recycling device 110 will be described in detail below.

FIG. 1 is a partially cutaway plan view of this recycling device, and FIG. 2 is a sectional view taken in the direction of the - arrow in FIG. 1. In these figures, reference numeral 10a is a front conveyance section, and 10b is a rear conveyance section.
a and 10b each have a common drive motor 15
A drive roller 1, a sheet suction reversing roller 2, an idle roller 3, and a tension roller 4 driven by
It consists of a plurality of endless belts 5 arranged and stretched in parallel,
A recess 6 formed between the drive roller 1 and the idle roller 3 by stretching the endless belt 5 in a concave shape by a tension roller 4 provided behind the drive roller 1 in the traveling direction of the endless belt 5. The recycle conveyance path 11 is formed by arranging the recycle conveyance path 11 by arranging the recycle conveyance path 11 by arranging the
is formed so that it can be divided into a front side and a rear side by this recess 6.

The sheet suction and reversal roller 2 is rotatably supported by a support drum 18 fixed to both side plates 16 via a bearing 17, and has an endless belt winding surface 2a and a document suction surface 2b provided with a large number of intake holes 19. The support drum 18 is provided with a blocking portion 18c for blocking a portion of the intake hole 19 formed in the document suction surface 2b that does not contribute to suction of the sheet document 101. At the same time, the front support drum 18a and the rear support drum 18b are communicated with each other via a suction duct 20, and the exhaust port 21 of the front support drum 18a is connected to an exhaust device (not shown) so as to be able to exhaust and stop the air, as necessary. The sheet original 101 is passed through the recycling conveyance path 11 by the rollers 2a,
It is configured to be sent in the order of 1a, 3b, 2b, 1b, 3a, and 2a, and to be repeatedly conveyed a required number of times.

Each tension roller 4 is rotatably attached to a support 25, and the support 25 is rotatably attached to a rotating shaft 26 whose both ends are supported by the side plates 16. Said both side plates 1
Each endless belt 5 is hooked to a hooking member 22 fixedly attached to the endless belt 6 via each coil spring 23 so that the tension of each endless belt 5 can be adjusted to an appropriate level.

In addition, the front conveyance section 10a and the rear conveyance section 10b
Transmission of the driving force to each of the driving rollers 1a and 1b is performed as shown in FIGS. 1 and 3.

That is, in these figures, a drive motor 15 with a built-in deceleration mechanism is fixed to the outer surface of the side plate 16b of the rear conveyance section 10b, and a pulley 28 rotatably attached to a motor shaft 27 and a A pulley 30 rotatably mounted on the outer end of the drive roller shaft 1 _B is drivingly connected by a timing belt 29, and a spur gear 31 rotatably mounted on the drive roller shaft 1 _B is connected to the front conveyor section 1.
The driving roller shaft _1A of 0a is drivingly connected to a spur gear 33 which is fixed to the outer end of the drive roller shaft 1A through an intermediate spur gear 32 which is attached to a shaft _1C fixed to the lower part of the outer surface of the side plate 16b. The driving force is transmitted to each drive roller 1a, 1b of the front side conveyance section 10a and the rear side conveyance section 10b.

This series of drive systems engages and engages so that the intermediate spur gear 32 and the spur gear 33 can easily mesh when the front conveyance section 10a and the rear conveyance section 10b are divided as described later. It is configured to be separable.

In the case where the endless belt 5 having a plurality of tension rollers 4 arranged in parallel is adjusted and tensioned individually as described above, it is possible to prevent the sheet document 101 that is repeatedly conveyed through the recycling conveyance path 11 from meandering; , is particularly useful in ensuring stable and repeated conveyance.

As mentioned above, the drive roller 1 and the idle roller 3
If a tension roller 4 is provided between the front conveyor section 10 and the endless belt 5 is stretched in a concave manner,
The front or rear conveyance section 10a or 10b is centered around the support shaft 18d of the support drum 18 that pivotally supports the sheet suction/reversal roller 2 of the front or rear conveyance section 10a or rear conveyance section 10b.
This is particularly useful for dividing the recycle conveyance path 11 by rotating each in the direction shown by arrow A separately.
The reason for this is that, as shown in FIG. 2, the rotation radius R of the other idle roller 3b is configured to be able to enter into the recess 6a of one side during rotation. This is because the recycle conveyance path 11 can be divided by rotating separately.

In addition, the reference numeral 24 in Figures 1, 2, and 4
is a microswitch for detecting the passage of the sheet original 1. For example, if the required number of copies N is set on the operation panel 50 of an electrophotographic copying machine, the microswitch 24 detects the passage of the sheet original 101 N times. When detected, the exhaust from the sheet suction reversing roller 2 of the recycling device is stopped, so that when the sheet document 101 has been repeatedly fed the required number of times N to the photographing unit 12, the document 101 is ejected from the recycling device. I have to.

In the above embodiment, a plurality of endless belts are arranged side by side, but the present invention is not limited to this, and it is also possible to construct the recycling apparatus of the present invention using a single endless belt.

<Effects of the invention> According to the invention, the front conveyance section and the rear conveyance section are disposed so that the recessed portions, each of which is provided with a tension roller and forms the tension adjustment section of the endless belt, face each other. Since the conveyance path is formed to be divisible, it is possible to easily take out a sheet document from the machine in the event that a sheet document fails to pass, and maintenance work can be easily performed.

Furthermore, since the front conveyance section and the rear conveyance section have substantially the same structure and are configured to be divisible as described above,
Adjust and assemble them separately in advance.
Since it is not necessary to make any further adjustments just by sequentially assembling it into the copying machine main body, it greatly contributes to productivity in the manufacture of electrophotographic copying machines.

In addition, the recesses in each of the front and rear transport sections are out of the path for recycling sheet documents, and the tension rollers are placed in these recesses, so even if the endless belt expands and contracts, the path length during recycling transport is never changes. In particular, between the front conveyance section and the rear conveyance section, or when multiple endless belts are arranged in parallel, even if one endless belt stretches, the conveyance path length will not vary. This eliminates the occurrence of sheet originals, prevents sheet originals from twisting or partially bending during recycling, enables smooth recycling conveyance of sheet originals, and can be expected to eliminate sheet feeding errors and maintain stable image quality when photographing the originals.

In addition, since the endless belt is stretched in a concave manner at the position where the front conveyance section and the rear conveyance section face each other, when the front and rear conveyance sections are rotated around the sheet material suction reversing roller, one side Since the idle roller of one conveying section does not come into contact with the endless belt of the other conveying section, both the front and rear conveying sections can be arranged close to each other.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the main diagram of a sheet original recycling device in an electronic copying machine according to the present invention;
2 is a side sectional view taken in the direction of the − arrow in FIG. 1, FIG. 3 is a side view of main parts showing interlocking relationships of the drive system, FIG. The figure is a perspective view of the electronic copying machine. DESCRIPTION OF SYMBOLS 1... Drive roller, 2... Sheet adsorption reversal roller, 3... Idle roller, 4... Tension roller, 5... Endless belt, 6... Recessed part, 10a...
...Front transport section, 10b...Rear transport section, 11...
Recycling conveyance path, 12...Manuscript photography department.

Claims (1)

[Claims for Utility Model Registration] 1. A drive roller, a sheet suction reversing roller, an idle roller, an endless belt stretched between these rollers, and a concave endless belt between the drive roller and the idle roller. It has a front side conveyance section consisting of a tension roller arranged at a position to form a recess for tensioning, and a rear side conveyance section that has approximately the same structure as this front side conveyance section. A sheet original recycling device for a copying machine, in which a set of recyclable transport paths is formed by arranging recessed parts of the parts to face each other, and this recycle transport path is arranged opposite to a document photographing part of the copying machine. 2. A sheet document recycling device for a copying machine as set forth in claim 1 of the utility model registration, wherein an endless belt having a plurality of tension rollers arranged in parallel is stretched separately from each other.