JPS62275957A - Printing paper conveying method for printer - Google Patents

Abstract

PURPOSE:To reduce the number of times of passing through between guides and prevent damage to a sheet of printing paper by holding the end of said sheet of printing paper in between a moving roller and a moving and pressure-contacting roller and stopping said rollers in a defined position and, after cutting the rear end, rotating said rollers in the interposingly holding condition, and making said rollers return to the original position when said sheet of printing paper is delivered to a developing machine side roller. CONSTITUTION:A moving roller 8 and a moving and pressure-contacting roller 10 stand by in an X position to interposingly hold the front end part of a sheet of printing paper P which is sent out of an exposure part and, as the printing paper P is further fed, the rollers 8, 10 are moved to a Y position while holding the front end part and stopped. After that, when the sheet of printing paper P is cut by cutters 27, 27 while being in a loop state, an advance roller 1 sends out the rear end of the printing paper P, and the rollers 8, 10 are moved toward a developing machine inserting roller 22 while interposingly holding the sheet of printing paper P, moved up to a Z position and deliver its front end to the roller 22 and, when the rollers 8, 10 release the printing paper P, the rollers 8, 10 are returned to the original X position and stand by for a sheet of printing paper to be fed next. Thus, the places for making a sheet of printing paper pass through between guides can be reduced, reducing the occurrence of damage to the sheet of printing paper.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for conveying photographic paper in a printer.

[Conventional technology]

Conventionally, in kicking machines, the photographic paper after exposure is guided to the exit drive roller using a guide to form a loop, resulting in a complicated structure due to the large number of parts such as guides and rollers. Moreover, since the photographic paper passes through the narrow gap in the guide, there is a problem that scratches occur frequently.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems and to provide a method for conveying photographic paper that minimizes passage through the noids that cause scratches as much as possible.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention has been developed by sandwiching the leading edge of photographic paper that is continuously fed from an exposure section between a waiting moving roller and a moving pressure roller. The movable pressure roller is moved to a predetermined position and stopped, and the leading end of the photographic paper that is continuously fed out hangs down while being held in the above-mentioned manner, forming a loop shape. Alternatively, when the final end of the long photographic paper passes the exposure section roller, the movable roller and the movable pressure roller move from the above-mentioned stop position toward the developing machine, and the leading end of the photographic paper being held is moved toward the developing machine. The feature is that the side roller is moved to release the pressure contact between the moving roller and the moving pressure roller, and then the moving roller and the moving pressure roller are returned to the standby position and the above operation is repeated.

[Effect]

In the present invention, the leading end of photographic paper that is continuously fed from an exposure section by a roller or the like is held between a waiting moving roller and a moving pressing roller, and while being held, the moving roller and the moving pressing roller The photographic paper is rotated toward the developing machine to transport the photographic paper from the exposure section to the developing machine. During the transport, the moving roller and the moving pressure roller are temporarily stopped at predetermined positions. As a result of this stopping, the photographic paper sent from the exposure section is stopped with its leading end being clamped, so that it hangs down and forms a loop. When the photographic paper is manually cut at the end of printing, or when printing continues and the longest paper that can be processed is accumulated, the movable roller and movable pressure roller hold the leading edge of the photographic paper and turn it toward the developing machine. The leading edge of the photographic paper is fed into the developing machine roller, and when the developing machine roller receives the photographic paper, the pressure contact between the moving roller and the moving pressure roller is released. In the released state, the shunting/moving roller and the movable pressure roller return to their original positions and wait for the next photographic paper to be fed.

The photographic paper is conveyed by repeating the above-described operations.

〔Example〕

The present invention will be explained based on embodiments shown in the drawings, but first,
An apparatus for carrying out the method of the present invention will be briefly described.

In the figure, 1 is an advance roller driven by a stepping motor (not shown), and 2 and 3 are feed rollers that cooperate with the advance roller 1 to feed the photographic paper P that is continuously fed from the exposure section. 4 is a first driving gear, and 5.5 is a sensor for detecting the leading edge of the photographic paper P being sent out on the transport path of the photographic paper P.

A is a rotating mount board for transporting photographic paper, and a movable roller mounting arm 6 is provided protruding from the lower side of the rotating mount board A.
A driven gear 7 that meshes with the first driving gear 4 described above is attached to the tip of the arm 6, and a shaft 9 to which a moving roller 8 is fixed is rotatably supported.
The moving roller 8 is rotated via the driven gear T by zero rotation.

A moving pressure roller 10 is provided with a one-way clutch and is brought into pressure contact with and separated from the moving roller 8. The moving pressure roller 10 is rotated by a moving pressure roller support frame 11 attached to a supporting back 12. The proximal end portion 12' of the supporting back 12 is mounted on a two-turn base board A.
It is fixed to a substrate 14 which is swung by a motor 13 mounted on the substrate 14.

A rotation fulcrum shaft 15 of the rotation pedestal board A is provided on the side of the upper part of the main body of the rotated pedestal board A so as to protrude through the main body, and on the opposite side from the movable roller mounting arm 6. At the tip of the protruding rotation fulcrum shaft 15, a rotation base board A is attached to an arrow B.
The spring or balance weight 1 is always rotated counterclockwise when viewed from the direction (side surface of the rotating base board A).
6. Further, a receiving rod 17 is provided on the main body of the rotating gantry board A to project upward, and a pressing rod 20 is provided to protrude from an arm rod 19 fixed to the shaft of the motor 18 for returning the rotating gantry board A. is in contact with the rod receiving portion 17.

Therefore, when the return motor 18 is driven, the pressing rod 20 protruding from the arm rod 19 presses the rod receiving part 17 provided on the upper part of the rotating pedestal board A, thereby rotating the rotating pedestal board A. The rotating base board A is rotated clockwise about the dynamic fulcrum shaft 15 against the bias of a spring or balance weight 16.

21 is a solenoid for holding the rotating gantry board A, which is used to temporarily stop the rotating gantry board A; 22 is a developing machine insertion roller; 23 is a gear for driving the insertion roller;
Reference numerals 24 and 25 are feed rollers that carry the photographic paper P into the developing machine in cooperation with the developing machine insertion roller 22, and 26 is a sensor that detects the leading end of the photographic paper P on the developing side.

Since this embodiment is configured as described above, its operation will be explained.

Initially, with the movable pressure roller 10 in pressure contact with the movable roller 8, the driven gear 7 provided on the shaft 9 of the movable roller 8 meshes with the first drive gear 4, and the movable roller 8 is rotated by the driven gear 7. The moving pressure roller 10 which is in pressure contact with the moving roller 8 is also waiting while rotating. This position is called the X position.

At the X position, the rotating base board A on which the movable roller 8 and the movable pressure roller 10 are mounted is rotated while the return motor 18 is stopped. A pressing rod 20 protruding from the arm rod 19 is brought into contact with a receiving rod portion 17 protruding above the rotating pedestal board A to hold the rotating gantry board A against the biasing member 16. , the moving roller 8 and the moving pressure roller are made to stand by at the X position.

When photographic paper P is sent from the exposure section by an advance roller 1 that is intermittently rotated by a stepping motor,
The leading edge of the photographic paper P is detected by the detection sensors 5, 5, and the photographic paper P is further fed to the rotating moving roller 8.
and the movable pressure contact roller 10, and are pressed together with a pinched fist.

The leading edge of this photographic paper P is connected to the moving roller 8 and the moving pressure roller 1.
0, the movable roller and the movable pressure roller 10 hold the leading edge of the photographic paper
It leaves the position and begins to rotate, but the timing at which this rotation begins is determined by the number of pulses of the stepping motor that drives the advance roller 1 after the leading edge of the photographic paper P is detected by the detection sensors 5, 5. Ru. The photographic paper P whose leading edge is pressed and held by the moving roller 8 and the moving pressure roller 10 is tensed by the rotation, but the moving pressure roller 10 is provided with a one-way clutch. Therefore, the photographic paper P is not pulled out from being held and pressed, but is rotated in the counterclockwise direction by the balance weight or spring 16 together with the moving rollers 8 and the rotating gantry board Atl1 as described above. Due to the rotation of the rotating base board A at this time, the pressing rod 20 protruding from the arm rod 19 of the return motor 18 is pressed to reverse the return motor 18, and the return motor 1
8 and the rotating pedestal board A.
be in a free state.

When the above-mentioned rotating gantry base board A rotates and moves away from the X position, the driven gear γ is also disengaged from the first drive gear 4, and the rotation of the moving roller 80 is also stopped, so that the moving port, −
Photographic paper P sandwiched between rollers and moving pressure rollers 10
The tip of the board A will be sent while being held as it is, and when the rotating gantry board A is rotated by the required angle, the rotating gantry board holding solenoid 21 will be activated to project the shaft 21'. ) Then, by bringing the shaft 21' into contact with the back surface of the upper rod receiving part 17 of the rotating gantry board A, the rotating gantry board A is stopped. This stopping position is defined as the Y position.

By stopping the rotating base board A, the leading edge of the photographic paper P remains held between the movable roller 8 and the movable pressure roller 10.
Although it is stopped, since the photographic paper P is being fed from the exposure section, the photographic paper P hangs down under its own weight and forms a loop.

Next, when printing is completed and the photographic paper P is cut by the cutter 27°27, or when the longest photographic paper P that can be processed has been accumulated through the above-described loop, the moving stand board holding solenoid 21 is actuated once to move the shaft. When 21' is moved, the rotating base board A is biased in the counterclockwise direction by Y
Start rotating while holding the leading edge of the photographic paper P.

The driven gear 7 is also moving with the rotation of the above-mentioned rotating gantry board A, and the pressing rod 20 protruding from the arm rod 19 of the return motor 18 is also moved to the upper holder of the rotating gantry board A. Part 1
7 and rotate together.

By rotating the rotating base board A from the Y position described above,
The driven gear 7 meshes with the second driving gear 23 on the developing machine side and is rotated, and this rotation also rotates the movable roller 8 and the movable pressure roller 10 that is in pressure contact with it, so that the movable roller 8 and the movable pressure roller 10 are rotated. The photographic paper P held between the two is fed out, and is taken over by the developing machine insertion roller 22 and the feed rollers 24 and 25, and the photographic paper P is fed into the developing machine and shredded. The position of the rotating gantry board A at this time will be referred to as the 2nd position.

As described above, when the photographic paper P is transferred to the developing machine insertion roller 22 and the feed roller 24, the pressure contact/separation motor 13
is driven to rotate the substrate 14, and the rotation of the substrate 14 causes the support back 12 to rotate in a direction away from the movable roller 8, thereby moving the moving pressure roller fixed to the support back 12. The support frame 11 is valved to separate the movable pressure roller 10 from the movable roller 8.

When the return motor 18 is driven with the pressure contact between the moving roller 8 and the moving pressure roller 10 released, the pressing rod 20 protruding from the arm rod 19 of the returning motor 18 begins to rotate. Since the pressing rod 20 is in contact with the upper rod receiving part 17 of the rotating pedestal board A, the rotation of the pressing rod 20 causes the rotating mount board A to rotate clockwise around the fulcrum shaft 15 against the old force. The rotating gantry board A rotates from the Z position toward the first position, the X position, and waits for the next photographic paper P to be fed at the X position. Become. In this standby state, as described above, the moving roller 8 and the moving pressure roller 10 are in pressure contact, and the driven gear 7 is in mesh with the first driving gear 4.

As described above, since the movable roller 8 and the movable pressure roller 10 are rotated while being in pressure contact with each other, even if the rear end of the photographic paper P cut by the cutter 27, 27 remains on the advance roller 1, the advance When the roller 1 rotates next time, it will be dropped into the loop tank by the moving roller 8 and the moving pressure roller 10, and there will be no problem in feeding the primary photographic paper P.

As explained above, in this embodiment, first, the moving roller and the moving pressure roller 10 are on standby at the X position. The leading edge of the photographic paper P fed from the exposure section is held between the aforementioned moving roller 8 and the moving pressure roller 10, and when the photographic paper P is further fed from the exposure section, the moving roller 8 and the moving pressure roller grip the photographic paper P. While holding the tip, move at the Y position and stop.

Thereafter, the photographic paper P sent from the exposure section becomes a loop, and when the photographic paper P is cut by the cutter 27, 27, the advance roller sends out the rear end of the photographic paper P, and the moving roller 8 and the moving pressure roller 10 It grips the paper P and moves it toward the developing machine insertion roller 22 on the developing machine side, and then the moving roller 8
Then, the movable pressure roller 10 moves to the Z position, passes the leading edge of the photographic paper P to the developing machine insertion roller 22, and transfers the leading edge of the photographic paper P to the movable roller 8.
Then, the movable pressure roller 10 releases the photographic paper P, and the movable roller 8 and the movable pressure roller 10 return to the original X position and wait for the next photographic paper to be sent.

Since the exposed photographic paper P is transported by the method described above, the number of passages between the guides can be reduced, thereby reducing the occurrence of scratches on the photographic paper.

This simplifies the transportation system and saves space.

Furthermore, the photographic paper is conveyed by being held between a moving roller and a moving pressure roller.

It can be used regardless of paper size and can be used up to the maximum width L (see Figure 3).

〔Effect of the invention〕

In the photographic paper conveyance method according to the present invention, the leading end of the photographic paper sent from the exposure section is held and conveyed by a moving roller and a moving pressure roller, which may cause scratches on the photographic paper. By reducing the number of points that pass between the guides, we are able to reduce the risk of scratches on the photographic paper, and by reducing the number of moving parts, we are able to reduce noise and simplify the system. Therefore, it is useful for space saving, and as mentioned above, since the leading end of the photographic paper is only held between the two, it can be used regardless of the size of the photographic paper.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, FIG. 1 is an explanatory diagram showing an outline of the method of the present invention, FIG. 2 is a perspective view of the rotating base board used in the present invention, and FIG. 3 is a diagram of the moving roller section. It is an explanatory diagram. A: Rotating base board 1, advance roller 4: First driving gear γ: Followed gear 8: Moving roller 10: Moving pressure roller
15 Two rotation fulcrum shafts 22: Developing machine insertion roller

Claims (1)

[Claims] The leading edge of the photographic paper that is continuously fed from the exposure section is held between a waiting moving roller and a moving pressing roller, and the moving roller and moving pressing roller are moved to a predetermined position and then stopped. The photographic paper that is continuously sent out hangs down with its leading edge held in the above-mentioned manner, forming a loop. When it passes, the movable roller and the movable pressure roller move from the above-mentioned stop position toward the developing machine side, transfer the leading edge of the photographic paper held between them to the developing machine side roller, and the movable roller and the movable pressure roller move together. 1. A method for transporting photographic paper in a printer, characterized in that the pressure contact is released, the moving roller and the moving pressure roller are then returned to the above-described standby position, and the above-described operation is repeated.