JPS6255665A - Copying machine - Google Patents

Abstract

PURPOSE:To remove simply and easily a recording paper which has become a jam state in a fixing roller, by releasing a means for raising a copying machine body by using a part thereof as a supporting point, and a driving means which is connected to a fixing device by an operating means projected from the vicinity of the supporting point position by raising the copying machine body. CONSTITUTION:An oscillating lever 90 which can turn freely by using a revolving shaft 32c of a double purchase gear device 32a-32b as a supporting point is energized clockwise by a tension spring 91 and can engage said gear 33 which has been attached axially to a position where it is engaged to a small gear 32b of the double purchase gear device 32a-32b, to said gear 34. When the front of a copying machine body 1 drawn up so as to contact to the floor surface by an inclined face part 1a, the oscillating lever 90 turns counterclockwise against the tension spring 91 by weight of the copying machine and detaches the gear 33 from the engagement of the gear 34. As a result, a fixing roller becomes a state that it can rotate freely, and in case a recording paper which is carried from an image transfer part has caused a jam, the recording paper can be removed easily by drawing it out freely in the carrying direction or its reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a copying machine using electrophotography or the like used as an office machine.

[Conventional technology]

The main body of a copying machine generally has a built-in driving motor with strong torque, and in a copying machine that performs exposure scanning by rotating the photoreceptor drum, conveying the recording paper, and moving the optical system, the optical device is In the case of a type in which exposure scanning is performed by reciprocating operation and moving the document, a structure is adopted in which the reciprocating operation of the document table is also driven by the same motor.

Of these, the photoreceptor drum and each roller for conveying the recording paper are always driven to rotate in one direction, as is well known, so generally a driving means is used in which they are directly connected to the motor shaft via a gear train. However, in such a power transmission system, even when copying is finished and the copying machine is stopped, the entire gear train is connected to the motor shaft, so each roller for conveyance is Its rotation is restricted, and it is not possible to rotate it forward or reverse manually.

[Problem that the invention seeks to solve]

However, in the fixing roller, which has the function of fixing and ejecting the recording paper on which the image has been transferred, the recording paper may not be completely peeled off from the fixing roller due to the adhesive action of the molten toner powder. In this case, it is necessary to stop the copying machine and remove the recording paper, but for the reason mentioned above, the fixing roller is also unable to rotate, so it is necessary to remove the recording paper. In many cases, trying to forcefully pull it out causes it to break, making removal work even more difficult.

An object of the present invention is to solve this problem and provide a copying machine that can easily and easily remove the jammed recording paper from the fixing roller.

[Means for solving problems]

A copying machine comprising means for lifting two parts of a copying machine main body as a fulcrum, and a driving means connected to a fixing device being released by lifting the copying machine main body and using an actuating means protruding from the vicinity of the fulcrum position. achieved by.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1-3.

FIG. 1 shows a copying machine. The arrangement of each gear in the drive system is shown in a front view, and the gears are shown with circumferences corresponding to the notched diameters for the sake of simplicity.

In FIG. 1, reference numeral 1 denotes a main body of the copying machine, and 2 a document table. The document table 2 is moved rightward by the power of the main body 1 to perform exposure scanning of the document.

Reference numeral 10 denotes a gear attached to the shaft of the drive motor that powers the main body 1, and is connected to the gear 16 of the photoreceptor drum shaft via gears 11, 12, 13, and 14 and two gear gears 15a-15b. The photoreceptor drum is rotated clockwise by the clockwise rotational drive of the drive motor, thereby forming and transferring an image.

Reference numeral 21 denotes a gear attached to the shaft of a feed roller that carries out the recording paper from a paper feed cassette (not shown) inserted into the main body 1, and a dimension 24 indicates the gear that carries out the recording paper carried out by the feed roller as an image on the photoreceptor drum. The gears 21 and 24 are gears attached to the shaft of the registration roller, that is, the second paper feed roller, which feeds the paper to the transfer unit in synchronization with the transfer unit 2.
2a -22b, Z3a -23b'? Since the gear 24 is further connected to the gear 11 via the gear 25, the clockwise rotation of the drive motor causes the feed roller to move clockwise to the second paper feed roller. rotates in a counterclockwise direction and conveys the recording paper to the transfer section by a nipping action between the two parts and a pressing roller that presses the two parts against each other.

Reference numeral 31 denotes a gear attached to the fixing roller shaft provided near the paper discharge port of the main body 1;
32b and a pressure roller connected through gears 33 and 34, which also rotates clockwise due to the clockwise rotation of the drive motor and presses against the lower part of the pressure roller. The recording paper is ejected to the outside of the main body 1 at the same time as the recording paper is fixed.

90 is the rotating shaft 3 of the gear device 32a-32b.
A drive lever which is an actuating means of the present invention that can freely rotate around 2 C as a fulcrum, and is biased clockwise by a tension spring 91 so that the 2-throw gear device 3
The gear 33, which is pivoted at a position where it meshes with the small gear 32b of 2a-32b, can be brought into mesh with the gear 34. That is, the gear 33 is 1.
It serves as a driving means in the copying machine of the present invention that transmits the rotation of the driving motor to the above-mentioned fixing roller.

Furthermore, the lower end portion 90a of the drive lever 90 is connected to a slope portion 1 formed at the rear of the bottom surface of the copying machine main body 1, as shown in FIG.
It protrudes downward from a and extends to a position where there is a slight gap between it and the floor.

In other words, the drive motor is structured so that it can operate the processes from forming a toner image to conveying, transferring, and ejecting the recording paper only by rotation in the clockwise direction.

Reference numeral 40 denotes a first actuating lever which is rotatably mounted around the rotating shaft 16a of the gear 16 as a fulcrum; Although it is biased, its lower end 40
Solenoid s1 fixedly attached to main body 1 in the long hole b
The pin P1 is engaged with the granger, and its rotation is prevented.

In this state, the planetary gear 41 is provided to mesh with the rack 2a provided on the entire length of the lower surface of the document table 2 to drive the document table 2 in the right direction. It is spaced apart from the drive gear 50 and is placed in a state where it cannot mesh.

Reference numeral 60 denotes a second operating lever rotatably mounted around the rotating shaft 50a of the drive gear 50, which
A planetary gear 61 meshing with the drive gear 50 is attached to the shaft and biased counterclockwise by a tension spring 62, and a plunger of a solenoid S2 fixedly attached to the main body 1 is inserted into the elongated hole at the right end 60b. The ball bottle P2 is engaged and its rotation is blocked.

In this state, the planetary gear 61 is separated from the large gear 70b of the two-throw gear device 70a-70b connected to the gear 16, and is in a state where it cannot mesh with the large gear 70b.

Further, the first actuating lever 40 is provided with a circular arc-shaped elongated hole 43 centered on the rotating shaft 16a, and the second actuating lever (a) is provided with a stop pin 63, so that the elongated hole 43 and the stop pin are provided. 63 (il-kept engaged, said first
When either the operating lever/IO or the second operating lever 60 rotates clockwise, the left side edge 43a of the elongated hole 13 and the stop bin 63 come into contact with each other and prevent the other from rotating. The structure is designed to prevent this.

Next is a name that explains the action of the mechanism described above.

When the drive motor is started by operating the copy button and the gear 10 is rotated clockwise, the gear 6 is also rotated clockwise to start charging the photosensitive drum, and at the same time the solenoid S1 is activated. The @1 operating lever 40 is rotated clockwise.

As a result, the planetary gear 41 meshes with the drive wheel 50, transmits clockwise rotation by the drive monitor to the drive gear, moves the document table 2 to the right, and starts exposure scanning of the document surface. be done.

During this time, the solenoid S1 remains in the activated state, so that the left edge 43a of the elongated hole 43 in the first actuating lever 40 is connected to the stop hinge 63 of the second actuating lever 60.
is maintained in contact with the second actuating lever 60.
Even if the solenoid S2 acts on the scale, it cannot rotate clockwise and the planetary gear 61 cannot mesh with the large gear 70b.

When the exposure scanning of the document surface is completed, the action of the solenoid S1 is released, and the first operating lever 40 is rotated counterclockwise by the action of the tension spring 42 to return to its initial position, and at the same time, the solenoid S2 is activated. Rotate the second operating lever 60 clockwise to move the planetary gear 61 to the large gear 70.
b, the counterclockwise rotation by the drive motor is transmitted to the drive gear 50, and an operation of moving the document table 2 leftward and returning it to its initial position is started.

During this time, the solenoid S2 remains in the activated state, so the stop pin 63 marked with the first actuating lever is kept in contact with the left side edge 43aK of the elongated hole 13 in the first actuating lever 40. Even if the solenoid S1 acts on the operating lever 40 scale, it cannot rotate clockwise and the planetary gear 41 cannot mesh with the driving gear 50.

When the document table 2 is returned to its initial position, the action of the solenoid S2 is released, and the driving gear 50 is again connected to the driving motor, that is, the gear 100, as shown in FIG.
Rotation is not transmitted, and on the other hand, the fixing roller, that is, the recording paper conveyance drive system including the gear 31, is connected to the gear 24 in addition to the fixing roller, with the gears remaining in mesh with each other. Second paper feed roller and gear 21
None of the feed rollers connected to the machine can be rotated manually, but as shown in the side view of FIG. Then, due to the weight of the copying machine, the drive lever 90 rotates counterclockwise against the tension spring 91 to disengage the gear 33 from the gear 3.l.

As a result, the above-mentioned fixing roller is in a state where it can freely rotate, and if the recording paper conveyed from the image transfer section jams, it can freely pull out the recording paper in the conveyance direction or the opposite direction. becomes possible and can be easily removed.

In addition, as shown in FIG. 3, by making the copying machine structured such that the main body 1 of the copying machine is tilted completely backwards and the conveyance path 3 through which the recording paper is conveyed can be opened, it is possible to further prevent jammed paper as described in L. Removal becomes easy.

〔Effect of the invention〕

The present invention tilts the copying machine into a position suitable for jam removal, inspection, and repair, and at the same time, through this operation, the conveyance rollers that make up the recording paper conveyance system are released from the connection with the power system and rotate freely. To provide a copying machine with good performance that is always maintained and that makes it easy to take out and remove jammed paper and improve the workability of inspection and repair.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a copying machine according to the present invention, and FIGS. 2 and 3 are side views thereof. 1...Copying machine main body 1a...Slope portion 1b...Stay 10...(Drive motor) gear 31
...(Fixing roller) gear 40...first operating lever 41, 61...planetary gear criminal...drive gear mark...
・Second operating lever 90... Drive lever 90 a...
lower end

Claims (2)

[Claims] (1) means for lifting a part of the copying machine main body as a fulcrum;
A copying machine characterized in that by lifting the copying machine main body, the driving means connected to the fixing device is released by the actuating means protruding from the vicinity of the fulcrum position. (2) A device according to claim 1, characterized in that the drive means is grounded by a slope portion formed on a part of the bottom surface of the copying machine main body, and the driving device is released by an actuating member protruding from the slope portion. Copy machine.