JPH04338064A - Recording device with detecting sensor - Google Patents

Abstract

PURPOSE:To form a sensor for detecting paper jam in a recording paper discharge part and a sensor for detecting the overflow of the recording paper stacked on a tray into one sensor. CONSTITUTION:One microswitch 3 (103) is provided with an actuator 3a (103a) for detecting paper jam on the upstream side of a paper discharge roller and an actuator 3b (103b) for detecting overflow on the downstream side of the paper discharge roller so as to enable the detection of both paper jam and overflow. There are further provided a means for judging whether to be overflow or paper jam, and a means for displaying to that effect.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus equipped with a detection sensor, and more particularly to a paper sensor in a recording sheet discharge section of a recording apparatus such as a facsimile.

0002

2. Description of the Related Art Conventionally, in this type of apparatus, as shown in FIG. They were set up one by one.

0003

[Problems to be Solved by the Invention] However, in the conventional example described above, since two sensors are used, there are drawbacks such as (1) increased cost and (2) increased size of the device.

0004

[Means for Solving the Problems (and Effects)] According to the present invention, the conventional two sensors are combined into one, and this sensor can detect both paper jams and overflows.

[0005]

[Embodiment] Fig. 1 is an overall cross-sectional view of an embodiment of the present invention, and Fig. 2 is a detailed view of a paper discharge section of the embodiment.
b is the upper and lower sheet guide plates, 2a and 2b are a pair of paper ejection rollers,
4 is a paper discharge tray, 3 is a microswitch, 3a is an actuator for detecting a paper jam, and 3b is an actuator for detecting an overflow. Further, in FIG. 1, the documents stacked on the document table 11 are separated by an ADF (auto document feeder) composed of a friction piece 12 and a separating roller 13, and are separated one by one by a pair of document feeding rollers 14.
The document is conveyed to the reading section 15 and discharged onto a document tray 17 by a pair of document discharge rollers 16 . 18 is an optical system, which is composed of a mirror, a lens, and a CCD. The document table 11 can be opened around the fulcrum 11a, and the recording paper roll 5 can be replaced by opening the document table 11.

Further, the recording paper fed out from the recording paper roll 5 is printed by a recording section composed of a thermal head 7 and a platen roller 8, and then passes between guide plates 9 and is then moved to upper and lower sheet guides 1a, 1b and guided onto the recording paper tray 4 by a pair of paper ejection rollers 2a and 2b. After recording, the trailing edge of the recording paper is cut by a cutter 10 and stacked on the recording paper tray 4. .

FIG. 2 is a detailed view of the recording paper ejecting section of the embodiment. An actuator 3a located between the upper and lower sheet guides for detecting paper jams, a pair of paper ejection rollers 2a,
An actuator 3b is provided downstream of the actuator 2b for detecting that the stacking height of the sheets stacked on the recording/discharging tray 4 exceeds a certain amount. The actuator 3b is located at a distance t upward from the recording/discharging tray 4, and when the stacking height reaches (t+α), the actuator 3b moves upward by α and activates the microswitch 3. It is designed to detect overflow (Figure 3). Here α is the microswitch 3
is the amount of movement of the actuator 3b until it operates.

FIG. 4 is a diagram showing a state when a paper jam occurs between the upper and lower sheet guides 1a and 1b.The actuator 3a is moved upward by the recording paper 5b, and the microswitch 3 is activated. A paper jam has been detected.

FIG. 5 is a perspective view specifically showing the shape of the actuators 3a and 3b provided in the microswitch 3. As shown in FIG. If an overflow or a paper jam is detected, the display section displays the same message, eg, "kilokushi tenken".

(Another Embodiment) FIG. 6 is a diagram showing an embodiment in which a photointerrupter 6 is used in place of the microswitch 3 in FIG. The actuators 6a and 6b are designed to rotate about a fulcrum 6c, and the lever 6a has the same function as the actuator 3a, and the lever 6b has the same function as the actuator 3b. In this case, the sheet is normally ejected immediately, so the lever 6a returns to the state shown in FIG. 6 and the photo interrupter 6 is immediately turned off. However, if a jam occurs, the lever 6a remains raised forever, so it is turned on. If the jam remains the same, a jam is detected.

FIG. 8 is a general sectional view of still another embodiment of the present invention, in which 103 is a microswitch. Other components that are the same as those in FIG. 1 are designated by the same numbers and will not be described again.

FIG. 9 is a detailed sectional view of the recording sheet discharge section, in which a microswitch 10 provided below the lower sheet guide 1b is shown.
3 is provided with two actuators 103a and 103b so as to move independently. When at least one of these two actuators moves, the switch portion 103c of the microswitch 103 is pressed, and the microswitch 103 is activated (ON). The actuator 103a is connected to the paper ejection roller pair 2a, 2
It is located between the upper and lower sheet guides 1a and 1b on the upstream side of the paper guide 1b, and is provided so as to be pushed downward by the paper passing therethrough. The actuator 103a is an actuator for detecting a paper jam. FIG. 12 shows an example of a paper jam state. The actuator 103b has its tip positioned downstream of the paper ejection roller 2a and slightly protruding from the outer peripheral surface of the roller, and at a position that is located downstream of the ejection roller pair 2a, 2b.
The actuator 103b and the recording paper 5a come into contact with each other when the recording paper 5a is being conveyed between the pair of paper ejection rollers 2a and 2b when the recording paper 5a is being ejected. It is designed not to.

[0013] The rear end of the recording paper 5a is the paper ejection roller pair 2a, 2.
When the paper is about to fall downward along the outer periphery of the discharge roller 2a after passing the contact point of
Push b down and turn on the micro switch. (Figure 10).

At this time, if the stacking height of the recording paper stacked on the recording paper tray 4 is low, the above-mentioned recording paper 5
After pushing down the actuator 103b, the rear end of a
The paper leaves the actuator 103b and is loaded onto the recording paper tray 4, and the actuator 103b returns to the top, turning the microswitch OFF (FIG. 11).
, when a certain amount of recording paper 5a is already stacked on the recording paper tray 4, as shown in FIG.
The rear end of the recording paper 5a remains pressed down on the actuator 103b, and the microswitch 103 is turned on.
It will remain as it is. Thereby, it is determined whether a certain amount (predetermined) of recording paper is stacked on the recording paper tray 4 (overflow detection).

FIG. 14 is a perspective view of the microswitch 103. It is activated by pressing the part 103c of the microswitch main body 103. Actuator 103a
, the actuators 103b are designed to move independently, and no matter which one is pushed down, the actuator 103c is pushed and turned on. When the pushing force is released, the actuator returns to its original position and the switch is turned off.

FIG. 15 is a block diagram of the device.

FIG. 16 shows the recording paper 5 at positions a to e in FIG.
Micro switch ON/O when a is being transported
It is a time chart showing an FF state.

[0018] In case (2), at the start of recording, there is no recording paper 5a in the range b to e, the actuators 103a and 103b are both OFF (that is, the microswitch 3 is OFF), and the recording paper 5a is conveyed until the leading edge reaches b. When it reaches the range, press 103a and the ON state continues until the rear end passes b. When the rear end reaches position c, 1
03a is turned OFF. Further, the rear end is a pair of paper ejection rollers 2a,
After passing the contact point of 2b, the rear end presses down 103b and O
103 when the trailing edge falls onto the recording paper output tray 4.
b returns to its original state and turns OFF. If the above state is detected within a predetermined time period, this is normal operation (FIG. 11).

■ is a flow representing an overflow state, and after the rear end presses down 103b, it remains on 103b, so 103b remains in the ON state (Fig. 1
3).

■ is a state in which the leading edge of the recording paper 5a and the trailing edge of the recording paper 103a have not fallen off the pair of paper ejection rollers 2a and 2b, ie, a paper jam has occurred in the apparatus.

[0021] In case of ■, the paper jam occurs further upstream at the leading edge.
The state in which both 103a and 103b remain OFF is shown. If this condition is detected, it is determined that there is a paper jam.

The table below summarizes the states of the flowchart. Turning the microswitch 103 ON and OFF at five points from a to e (at elapsed times t1 to t4)
Looking at the F status, as shown in the table below, there are different ON-OFF status patterns for normal, overflow, and paper jam. The difference in this pattern is determined by the software in the device (a, b, c, d, e
Knowing the state of
A display suitable for each case is displayed on the display section.

[0023] For example, in the case of ■ “Shuuryou” ■ In the case of “Treigaippaides” ■ “Kirokushi Tenken”

[0024]

[Table 1]

Although a microswitch is used in the above embodiment, a photointerrupter may also be used.

Furthermore, instead of displaying the information on the display section, a different sound may be played (or a combination of display and sound is also possible).

As explained above, other embodiments (FIGS. 8 to 8)
According to Figure 16), there is one sensor that detects overflows and paper jams, and two actuators that move independently are installed in this sensor. When one end leaves the pair of paper ejection rollers and falls onto the tray, it moves to turn on a microswitch, and the other end is installed upstream of the pair of paper ejection rollers to detect the presence or absence of paper between the upper and lower sheet guides. When conveying paper, the three conditions of normal, overflow, and paper jam are determined based on the changing pattern of the ON-OFF state of the microswitch, and the appropriate display is displayed on the display. This has the effect that the user can immediately know the status of the recording paper by looking at the display section. That is,
There is no need to think that there is a paper jam when the paper on the tray overflows and try to take action, or vice versa.

[0028]

[Effects of the Invention] As explained above, by attaching multiple actuator parts to one sensor, the overflow sensor and the paper jam sensor can be made into the same sensor. You can use only one sensor. As a result, ■The number of sensors is reduced, resulting in cost reduction.

(1) Since one sensor space is unnecessary, the device can be made smaller.

(2) Wiring of the sensor becomes easier, and assembly efficiency is improved. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a front view showing the overall structure of an information receiving device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the main parts.

FIG. 3 is an explanatory diagram of overflow operation.

FIG. 4 is an operation explanatory diagram showing the state of a paper jam.

FIG. 5 is a perspective view of the same microswitch.

FIG. 6 is a front view of main parts showing another example.

FIG. 7 is a perspective view of the switch.

FIG. 8 is a front view showing the overall structure of an information receiving device according to still another embodiment of the present invention.

FIG. 9 is an enlarged operational explanatory diagram of the main parts.

FIG. 10 is an enlarged operational explanatory diagram of the main parts.

FIG. 11 is an enlarged operational explanatory diagram of the main parts.

FIG. 12 is an explanatory diagram of the operation at the time of a jam, with the main part enlarged.

FIG. 13 is an enlarged diagram illustrating the operation at the time of overflow of the main part.

FIG. 14 is a perspective view of the switch.

FIG. 15 is a block diagram.

FIG. 16 is a flowchart.

FIG. 17 shows a conventional example.

[Explanation of symbols]

3,103 Micro switch 3a, 103a Jam actuator 3b, 1
03b Overflow actuator 4 Paper output tray

Claims (2)

[Claims] [Claim 1] A sensor for detecting when the stacked amount of sheets discharged and stacked on the tray exceeds a certain amount, and a sensor for detecting a paper jam on the upstream side of the sheet discharge direction from the paper discharge roller. A recording device equipped with a detection sensor, which is characterized in that it has the same sensor as the above sensor. [Claim 2] A sensor for detecting that the amount of sheets discharged and stacked on the tray exceeds a certain amount, and a sensor for detecting a paper jam on the upstream side of the sheet discharge direction from the discharge roller. What is claimed is: 1. A recording device equipped with a detection sensor, having means for determining whether there is an overflow or a paper jam, and different displays are displayed on the display section of the device.