JPH0398936A - Paper feeding device - Google Patents

Abstract

PURPOSE:To simplify the structure of a sensor part by providing a sensor for detecting both the presence of paper and the rotational position of an auxiliary roller. CONSTITUTION:When all the documents are fed to a read part, a pressing plate 26 abuts on a transfer surface 33, and also the terminal 36 of a switch 35 abuts on a switching cam surface 34. In this condition, however, the terminal 36 is in such a condition that it has been arranged in a higher position by the cam surface 34, and the switch 35 is maintained in the ON state. When an auxiliary roller 31 is further turned in the direction Y, the terminal 36 is brought into contact with the flattened part of the cam surface 34. In this condition, the terminal 36 is arranged in a lower position, and the detecting switch 35 is turned into the OFF state. Thus, it is detected that all the originals have been transferred, and that the auxiliary roller 31 is not projected above from a table 1a. When the switch 35 is turned into the OFF state, the driving of a shaft 22 and 23 is stopped, and the initial condition is regained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a paper feeding device, particularly a sleeve supporter 1 having a non-circular cross section.
The present invention relates to a paper feeding device equipped with a cola.

[Conventional technology]

Tsuchiki's paper feed devices, such as facsimile paper feed devices, consist of a paper feed tray that can store multiple sheets of paper, a paper feed roller placed near the exit of the paper feed tray, and a feed roller that feeds the paper to the paper feed roller. The roller is equipped with an auxiliary roller having a non-circular cross section to perform this intermittently.

This type of paper feeding device also includes a document detection sensor for detecting whether or not a document is placed on the paper feed tray;
An auxiliary position detection sensor for detecting the rotational position of the cola is provided (for example, the
No. 545).

[Problem to be solved by the invention]

In the conventional configuration, it is necessary to provide a sensor for detecting the rotational position of the auxiliary roller in addition to a sensor for detecting the presence or absence of a document. Therefore, in the conventional structure, the structure becomes complicated and the manufacturing cost inevitably increases.

An object of the present invention is to provide a paper feeding device that can simplify the structure and reduce costs without reducing the number of required sensors.

[Means to solve the problem]

In the paper feeding device according to the present invention, the paper storage section, the paper feeding section, the auxiliary roller, and the sensor are arranged unevenly. The paper storage section is a storage section that can store a plurality of sheets of paper. The paper feed section is disposed near the exit of the paper storage section, and is a paper feed section that conveys the paper in the paper storage section. The auxiliary roller is provided in the paper storage unit, has a non-circular cross section, and is a roller for feeding paper to the paper feed unit.The sensor detects whether or not there is paper in the paper storage unit. , and the rotational position of the auxiliary roller.

[Function] In the paper feeding device according to the present invention, paper is stored in the paper storage section. Next, by rotating the auxiliary roller, the paper in the paper storage section is supplied to the paper feeding section. This supply operation is
This is done intermittently because the auxiliary roller has a non-circular cross section. The paper supplied to the paper feed section is discharged out of the paper storage section each time the paper is conveyed by the paper feed section.

In the above operation, the sensor detects the presence or absence of paper in the paper storage section and also detects the rotational position of the auxiliary roller. In other words, this sensor can detect not only the presence or absence of paper but also the rotational position of the auxiliary roller. Therefore, there is no need to provide sensors for detecting the paper sheet and for detecting the rotational position of the catching roller, and the structure is simplified and the paper feeding device can be manufactured at low cost.

[Embodiment] FIG. 1 is a schematic longitudinal cross-sectional view of a facsimile machine in which a paper feeding device according to an embodiment of the present invention is used. 1st
In the figure, the facsimile main body 1 mainly includes a recording section 2.
and a reading section 3 disposed above it. A document (not shown) is supplied to the reading section 3 from a paper feeder 20 .

The recording unit 2 is provided with a thermal head 6 for printing received information on thermal paper 5. A printing roller 7 is arranged below the thermal head 6.
The tip of the thermal paper 5 wound into a roll is inserted between the cover 6 and the printing roller 7. A conveyance path 8 is provided downstream of the thermal head 6 (on the left side in FIG. 1). On the downstream side of the conveyance path 8, a pair of upper and lower discharge rollers 9 are arranged. Furthermore, on the downstream side of the ejection roller 9, there is an ejection tray 4 from which recording paper and original documents are ejected.
is installed. Note that a power supply unit 19 is arranged adjacent to the thermal paper 5.

The reading unit 3 includes a light source l1, a light source 12a to 12c, and a CC0 unit 13 for reading image information on the document.
is provided. A document transport path 14 is provided between the reading section 3 and the paper feeder 20, and a timing switch 15 is provided in the document transport path 14 for controlling each part of the paper feeder. In addition, the timing switch 15
Upstream fl! A reading roller 16 is arranged on I1 (on the right side in FIG. 1) for conveying the document to the reading section with a predetermined tying.

The upper surface of the facsimile main body 1 serves as a document mounting table 1a, and a document guide l8 is attached to the end of the L side of the facsimile main body 10).

A paper feed roller 21 is arranged at the end of the paper feed device 20 on the side of the reading section 3, adjacent to the mounting table 1a. As shown in FIG. 2, the paper feed roller 21 is fixed to a shaft 22 connected to a drive system (not shown). A friction pad 23 is arranged above and facing the paper feed roller 2l. The friction pad 23 is made of rubber or the like having a high coefficient of friction. Further, the friction pad 23 is fixed to a braget 24 arranged on the -L side of the mounting table 1a. Bracket 2
A base of a pressing leaf spring 25 that presses the friction pad 23 from the back side is fixed to 4. On the other hand, bracket 2
A document holding plate 26 adjacent to the bracket 24 is arranged on the upstream side of the document holding plate 4 .

The upper end base of the presser plate 26 has a pin 2 extending parallel to the shaft 22.
It is rotatably supported by 7. Further, a spring 28 is installed in a compressed state between the holding plate 26 and the bracket 24, so that the holding temporary 26 is always urged in the direction of the arrow X.

At a position corresponding to the lower end of the holding plate 26, the mounting table 1a
A hole 30 is formed in the hole 30 . The auxiliary roller 31 arranged below the mounting table 1a is exposed upward through the hole 30. The auxiliary roller 31 is fixed to a shaft 32 connected to a drive system (not shown), and is indicated by an arrow Y.
It is designed to be driven in the direction. As shown in FIG. 3, the auxiliary IJ-ra 31 has a document conveyance surface 33 having an oval cross-sectional shape. Further, a switching cam surface 34 that is flatter than the conveyance surface 33 is provided at a position adjacent to the conveyance surface 33 . 1111 The lower end of the presser plate 26 is
It is in contact with the conveying surface 33. Note that the tip of the detection terminal 36 of the detection switch 35 is in contact with the switching force 5 surface 34 . The main body of the switch 35 is arranged above the mounting table 1a, and the detection terminal 36 extends in an arc from the main body towards the ++li auxiliary roller 31 side.

Next, the operation of the above embodiment will be explained.

When an operator uses a document to send a facsimile, the document is placed on the table la of the paper feeder 20. Then, the leading edge of the document is inserted into the paper feed roller 21 side. As a result, a large number of stacked originals (A in FIG. 4) overcome the spring force of the spring 28 and rotate the holding plate 26, as well as rotate the terminal 36 of the switch 35 upward. As a result, the switch 35 is turned on, and the control unit (not shown) confirms that the document A has been set.

When the operator issues a transmission command by pressing the transmission button, the shafts 22 and 32 rotate.

First, by rotating the sleeve support roller 3l in the Y direction,
The conveyance surface 33 transfers the lowest one of the eight originals to the paper feed roller 2.
avenge l. The auxiliary roller 3l has an elliptical conveyance surface 33
Since the long-sleeve side part of the long-sleeve side part is arranged to protrude above the mounting table 1a, the document A is intermittently supplied to the paper feed roller 2l. The supplied original is further conveyed to the downstream side by a paper feed roller 2l that rotates in the Z direction, and is supplied to the reading section 3 via a reading roller 16 (FIG. 1). In the reading section 3, the light emitted from the light source 11 is reflected on the surface of the document, and the CCD unit 13 reads it as image information.

As the originals A placed on the mounting table 1a are fed one after another to the reading section 3 as described above, the COD unit 1
3, the image information of the document is read, and the read image information is transmitted via a telephone line or the like.

When all the documents A are supplied to the reading section 3, the presser plate 2G is placed on the conveying surface 33 as shown in FIG.
The terminal 36 of No. 5 comes into contact with the switching cam surface 34. However, in the state shown in FIG. 5, the terminal 36 is placed above the cam surface 34, so the switch 35 remains in the ON state. When the auxiliary roller 31 further rotates in the Y direction, the terminal 36 comes into contact with the flat portion of the cam surface 34. In this state, as shown in FIG. 2, the terminal 36 is placed downward, so the detection switch 35 is in the OFF state. As a result, it is detected that the document A has been conveyed flat and that the auxiliary roller 31 is not protruding upward from the mounting table 1a. When the switch 35 is turned off, the shaft 22.
By stopping the drive of 32, the initial state as shown in FIG. 2 is returned.

In this way, in the embodiment described above, the presence or absence of a document and the attitude of the auxiliary roller 31 can be detected using one detection switch 35. Therefore, in this embodiment, fewer sensors are required, which simplifies the structure and reduces manufacturing costs.

[Other Examples]

(a) The switching cam surface 34 of the catching roller 3l may be omitted, and the terminal 36 of the switch 35 may be brought into contact with the conveyance surface 33. In this case, the conveying surface 33 also serves as a switching cam surface. As a result, the auxiliary roller 3
The structure of 1 can be simplified. However, when the switching cam surface 34 is used, the vertical movement range of the terminal 36 is increased, so the reliability of the operation of the switch 35 is higher.

(b) Instead of the holding plate 26 and the switch 35, a holding plate 40 and a switch 4l as shown in FIG. 6 may be used. The holding plate 40 shown in FIG. 6 has a protrusion 42 integrally formed on the base side. Then, this protrusion 42 is the switch 41
Turn on/off. In this case as well, the present invention can be carried out in the same manner and similar effects can be obtained.

(C) Instead of the switch 35 arranged above the mounting table 1a, a switch 43 arranged below the mounting table 1a may be used as shown in FIG. In this case, the detection terminal 44 of the switch 43 extends below the auxiliary roller 3l toward the paper feed roller 2l, and its tip is bent in both directions and protrudes from the -ζ mounting table 1a.

The tip of the detection terminal 44 is pushed downward when the document is placed on the mounting table 1a. Further, when the auxiliary roller 31 rotates, the terminal 44 also moves up and down accordingly. Along with these movements, the switch 43 is turned on and off, and the presence or absence of the document and the attitude of the auxiliary roller 3l can be detected.

((j) In the above embodiment, the presence or absence of a document and the rotational position of the sleeve support roller are detected using a mechanically operated switch, but the present invention is not limited to this. For example, a switch that operates optically or acoustically may be used. A sensor may be used. In this case, the sensor is placed above the mounting table 1a so as to face the auxiliary roller 31.Then, the sensor is used to measure the distance to the sliding member. By doing so, the presence or absence of paper and the rotational position of the auxiliary roller can be detected.

(b) The present invention can be applied not only to the facsimile machine as in the above-mentioned embodiments, but also to the paper feed section of a copying machine, for example.

〔Effect of the invention〕

According to the paper feeding device according to the present invention, since the sensor is provided to detect both the presence of paper and the rotational position of the auxiliary roller,
The structure of the sensor part is simplified, and the paper feeding device can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a facsimile machine incorporating an embodiment of the present invention, FIG. 2 is a partial vertical cross-sectional view of the paper feeder portion thereof, FIG. 4 and 5 are diagrams corresponding to FIG. 2 showing the operating state of the paper feeding device, and FIGS. 6 and 7 are diagrams corresponding to FIG. 2 showing different embodiments. la...Placement table, 2l...Paper feed 111-la, 3l.
...Auxiliary roller, 35, 41.43...Detection switch.

Claims (1)

[Claims] (1) A paper storage section that can store a plurality of sheets of paper; a paper feed section that is arranged near the exit of the paper storage section and transports the paper in the paper storage section; A feeder comprising: an auxiliary roller having a circular cross section for feeding paper to the paper feed section; and a sensor for detecting both the presence or absence of paper in the paper storage section and the rotational position of the auxiliary roller. paper equipment.