JPH04173650A - Photographic paper feeding condition detector - Google Patents

Abstract

PURPOSE:To detect the occurrence of paper jam, the presence or absence of photographic paper and the completion of the photographic paper setting with one detector by providing a rotator which rotates with the movement of the photographic paper and a rotation detecting means which detects the rotation of the rotator. CONSTITUTION:When there is no photographic paper 11, the photographic paper is not set or paper jam precludes the photographic paper 11 from being fed, a rotator 8 has no contact with the photographic paper 11 and no rotation. The non-rotation status of the rotator 8 is seized as an electric signal by a rotation detecting means 9 and formed into an abnormal signal in feeding the photographic paper to give corresponding information to an alarm circuit and a display circuit.

Description

Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device for detecting the feeding state of photographic paper, and detects abnormalities in the feeding of photographic paper during printing, the presence or absence of photographic paper, and the detection of photographic paper. This device instantly detects the completion of printing and prevents printing errors.

(Conventional technology) Yes. FIG. 5 shows an open state (preparation state) for paper feeding. Figure 6 shows the paper feed system lock (ready completed)
FIG. 7 is an enlarged front view showing the driven platen 2. Identical parts are designated by the same numbers in FIGS. 5-7. In the figure, reference numeral 31 denotes a drive platen which is driven by a motor. 32 is driven prana/
Is it pressed by the drive platen 31 and the method described below and its frictional force? Transfer the photographic paper 36 to the photographic paper supply box 47
The paper is sent in the direction of arrow 37, printed with a laser beam along the way, and guided to the print completion box. Driven prana/3
2 is attached to the platen holding fitting 33 and is freely rotatable from a bearing 561 in FIG. Further, the platen holding fitting 33 can be freely rotated as a fulcrum 38. Reference numeral 41 denotes a platen presser support fitting, which is rotatable around a fulcrum 42. A platen fitting holding pin 39 is attached to the tip of the platen supporting fitting 41.

The platen holding pin 39 is always held in the direction of the arrow 50 by the spring 40.
being held down in one direction. When the lock lever 43 is moved in the direction of arrow 50, the tip of the platen fitting holding pin 39 presses the receiving portion 48 of the platen holding fitting 33. When moved further, the lock claw 4 attached to the lever holding fitting 44
The lock receiver 5 is housed in the member 46. On the other hand, the lock pawl 45 is constantly pulled in the direction of arrow 52 by the spring 51.

The reaction force of the spring 40 and the reaction force of the spring 51 ensure c27. This force also becomes pressure between the driving platen 31 and the driven platen 32. FIG. 6 shows a locked state in which the driving platen 31 and the driven platen 32 are in close contact with each other and paper feeding preparations are complete. If you want to unlock it,
Move the oy switch bar 43 in the direction of arrow 53. When the lock claw 45 and the lever holding metal fitting 44 slide on the receiving part 48, the lock claw 45 moves in the direction of arrow 54, and the spring 40
The lock is released against the reaction force t. 35 is an optical sensor, and 34 is a rotating member provided with a slit.

This slit is attached to one side of the shaft of the driven platen 32, as shown in FIG. 7, and always rotates in synchronization with the driving platen 31 when the paper feed system is locked and ready for printing. Optical processor 35 by rotating the slit
A certain signal is input to the Detects the state of the input signal and determines whether a paper jam has occurred.

When a paper jam occurs, the photographic paper 36 sandwiched between the drive platen 31 and the driven platen 32 slips and does not move.
becomes out of sync. Therefore, the input signal is disturbed and a paper jam is determined. When setting photographic paper, use the fifth
As shown in the figure, the lock is released and the paper is pulled out and pulled up slightly above the drive platen 31 manually (see Figure 6). 49 is a lock detection switch, which is attached to both ends. It is detected whether the platen presser support fitting 43 is completely locked at both ends. This is determined based on the signal state of the lock detection switch 49. It is possible to judge whether or not the photographic paper cent is completed. 55 is a photographic paper presence/absence sensor. Photographic paper 3
The presence or absence of paper is detected based on whether or not 6 is obstructed. Further, the above-mentioned detection results are displayed on the display.

However, in detecting the presence or absence of photographic paper, a light beam is emitted onto the printing surface of the photographic paper 36, so there is a risk that the photographic paper 36 will be exposed to light. In addition, if the photographic paper 36 is above the photographic paper presence/absence sensor 55 and is below the driving platen 31/driven platen 32 and is fully locked, check whether the photographic paper 36 has been set in advance. It was also impossible to detect. Additionally, sensors and switches are required for paper jam detection, photographic paper cent detection, and photographic paper presence/absence detection, which requires securing space and a mechanism for installation, making the structure of the main unit complicated. Not only that, but it also caused high costs, which was a very disadvantageous situation for miniaturization and weight reduction. Furthermore, since the resolution of these abnormalities in photographic paper involves similar processing, there is no need to display an error for each cause of the abnormality.

(Problems to be Solved by the Invention) An object of the present invention is to use a single detector for paper jam detection, photographic paper set detection, and photographic paper presence/absence detection without using multiple sensors/switches. It is an object of the present invention to provide an inexpensive photographic paper feeding state detection device.

(Means for Solving the Problems) The gist of the present invention, which has solved the above problems, is to provide a rotating body that contacts the photographic paper and rotates as the photographic paper is fed in the middle of the transport path for transporting the photographic paper, and The feeding state detecting device of the patent is characterized in that a rotation detecting means for detecting the rotation of the rotating body is provided, and the feeding state of photographic paper is detected by detecting the rotational state of the rotating body by the rotation detecting means.

(Function) In the present invention, if there is no photographic paper, if photographic paper is not set, or if a paper jam occurs and the photographic paper is not being fed, the rotating body is not in contact with the photographic paper and rotates. do not. The non-rotation of the rotating body is detected as an electrical signal by a rotation detecting means, and the information is provided to an alarm circuit, a display circuit, etc. as a signal indicating an abnormality in photographic paper feeding.

(Embodiments) Hereinafter, embodiments of the present invention shown in FIGS. 1 to 4 will be described based on the drawings.

1 to 4 show an embodiment of the photographic paper state detection device of the present invention. FIG. 1 is a cross-sectional view showing the paper feeding mechanism in a ready state for printing, and FIG. FIG. 3 is a cross-sectional view showing a state in which the knob is released, and FIG. 3 is a perspective view of the mechanism detecting section. The photographic paper 11 is pulled out of the paper supply box 1, passes through the guide rollers 3, and passes through the drive platen 5. The drive platen 5, the driven planar/4 and the photographic paper 1 are sandwiched between the driven planar 74 and the driven planar 74.
It moves in the direction of arrow 12 due to the frictional force of 1. The paper is then printed by laser light 13 and placed in the photographic paper storage box 2. The driven platen 4 is independently operable. When the opening/closing knob 15 is pulled forward, the freely rotatable roller 18 attached to the opening/closing knob 15 slides along the receiving part 17 of the platen holding fitting 14, and the opening/closing knob 15 is moved in the direction of the arrow 19.
It is possible to separate the driven platen 4 from the drive planar 15. The platen holding fitting 14 is pulled toward the driving platen 5 by a spring 16. The second state after the opening/closing knob is moved.
As shown in the figure. 6 and 7 are paper guides, and 8 is a rotating body that rotates with the movement of the photographic paper 11, and is attached to the mounting plate 10. A rotation detector 9 is a rotation detection means for detecting rotation. When the photographic paper 11 moves, the rotating body 8 rotates, and a change in the signal is detected by the rotation detector 9. As shown in FIG.
! t) is selected and the rotation data from the buffer 23 is read into the CPU 21 through the PIC 22 again. In this way, the state of the photographic paper is detected by the detection signal from the detector 9.

To set the photographic paper 11, open the opening/closing knob 15 to make it ready for printing (the state shown in Figure 2), manually pull out the photographic paper 11 from the photographic paper supply box 1, and connect the driving platen 5 and the driven platen 4.
and passes below the rotation detector 9. Photographic paper 1
1 passes through the rotating body 8, the rotating body 8 rotates. A rotation detector 9 detects this rotation and detects the presence of the photographic paper 11. Next, close the opening/closing knob 15 (the state shown in FIG. 1). The photographic paper setting is now complete. When the drive roller 5 is rotated in the above state, the photographic paper 11 is sent to the photographic paper storage box 2 by the spring force of the spring 16 and the friction between the photographic paper 11 and the driven platen 4. If there is no photographic paper 11, the rotating body 8 will not rotate and will be detected. If the photographic paper 11 is not locked, the driving platen 5 and the driven platen 4 are not in contact with each other, so that the photographic paper 11 is not fed and the rotating body 8 is not rotated, so that detection can be performed. Also, if the photographic paper is not fed accurately, an abnormality will occur in the input signal and can be detected.

(Effects of the Invention) As described above, the detection device of the present invention uses a rotating body that rotates as the photographic paper moves and a rotation detecting means that detects the rotation of the rotating body to detect occurrence of paper jam, presence or absence of photographic paper, etc.
Completion of setting of photographic paper can be detected with one detector, and therefore a small, lightweight, and inexpensive device capable of detecting the feeding state of photographic paper can be achieved.

[Brief explanation of the drawing]

1 to 4 are diagrams showing one embodiment of the mechanism section of the state detection device of the present invention, FIG. 1 is a cross-sectional view showing the paper feeding mechanism section in a state where printing preparation is completed, and FIG. 3 is a perspective view of the detection section, FIG. 4 is a block diagram of the rotation detection circuit, and FIGS. 5 to 7 show a conventional photographic paper feeding mechanism and photographic paper state detection device. FIG. 5 is a sectional view showing the conventional device in the paper feeding open state, FIG. 6 is a sectional view showing the locked state, and FIG. 7 is an explanatory diagram showing the rotation detection mechanism. l: Photographic paper supply box 2: Photographic paper storage box 3: Guide roller 4: Driven platen 5: Drive platen 6
: Paper guide 7 Two paper guides 8: Rotating body 9: Rotation detector 11: Photographic paper 13: Laser light 14: Platen holding bracket 15
: Opening/closing knob 16: Spring 18: Roller 21: CPtJ 22: PIO23:
%777 24: P
I325 Near address selector 31: Drive platen 32: Driven platen 33 Ni platen holding fitting 34: Rotating member 35: Optical sensor 3
6: Photographic paper 39 Nib laten metal fitting presser bin 40: Spring 41 Nib laten presser support metal fitting 43: H lever 44: Lever holding metal fitting 45
: Lock claw 46: Lock receiver H member 47:
Photographic paper supply box 49: Pocket detection switch 51: Spring 55: Photographic paper presence/absence sensor 56:
Bearing 59: Laser light 60: Photographic paper storage box Patent Applicant: Matsushita Electric Industrial Co., Ltd. Representative: Patent attorney: Yasuhiro Oka (and 2 others) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1) A rotating body that contacts the photographic paper and rotates as the photographic paper is fed is provided in the conveyance path for conveying the photographic paper, and a rotation detecting means for detecting the rotation of the rotary body is provided to detect the rotational state of the rotary body. 1. A photographic paper feeding state detection device, characterized in that the photographic paper feeding state is detected by detection using a rotation detection means.