JP3407256B2 - Paper transport device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper conveying device applied to an image forming apparatus such as a facsimile, a copying machine, a printer and the like.

[0002]

2. Description of the Related Art In order to convey a sheet to an image forming unit, the sheet conveying apparatus usually comprises a guide plate forming a conveying path for guiding the sheet, a sheet conveying roller and the like. When a paper jam or jam occurs in the
The sheet can be taken out from an opening provided in the main body of the apparatus. The opening can be opened and closed by a cover body, and when taking out a paper having a trouble, the cover body is moved to open the opening which is normally closed.

[0003]

In the above-described paper conveying apparatus, when taking out a paper having a trouble during conveyance, it is necessary to move the cover body to open the opening and then to open the guide plate at the trouble occurrence place. There was, and the work was complicated.

Further, the movement of the guide plate means that the guide plate is displaced from the predetermined position, or if one of the pair of paper conveying rollers is provided on the guide plate, the guide plate is moved between the pair of rollers when returning. If it is not set so that there is no positional deviation, it may cause conveyance failure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper transporting device which can easily take out a paper sheet having a trouble during transportation and does not cause any trouble in restarting the transportation after the paper sheet is taken out. .

[0006]

In order to achieve the above-mentioned object, the present invention is directed to a conveyance plate constituted by a guide plate for forming a conveyance path for conveying and guiding a paper in a predetermined direction, a conveyance path, a paper conveyance roller and the like. A cover body that opens and closes an opening that exposes the system to the outside, and the guide plate is movably provided in the main body of the apparatus to enable opening of the transport path, and the cover body and the guide plate are opened and closed. In a paper transporting device in which the cover body and the guide plate are connected by a link body so that the operation is interlocked, the link body is arranged on both sides of the guide plate, and the guide plate is provided in each link body. A storage hole that is long in the direction is provided, a pressing shaft is provided so as to penetrate each storage hole, a spring is provided in each storage hole, and the pressing shaft can be reciprocated by the elastic force of the spring. To the guide Characterized in that the provided pressing portion for positioning is pressed into place.

Further, the present invention is characterized in that the link body is provided with a bearing for the pressing shaft.

[0008]

In the paper transporting apparatus according to the present invention having the above-mentioned structure, the transporting path of the guide plate is opened together with the opening operation of the cover body, so that the work for taking out the paper having the trouble from the transporting path can be simplified. Moreover, since the cover body and the guide plate are connected by the link body, the returning work is facilitated, and the mutual positional restrictions are imposed, so that the positioning at the time of the return can be accurately performed.

By installing a spring for pressing the guide plate to a predetermined position, the guide plate can be positioned more accurately.

It is possible to press the guide plate as described above by the pressing portion of the pressing shaft that receives the elastic force of the spring, and press the guide plate at any position within the range of the pressing shaft in the longitudinal direction. Therefore, the degree of freedom in design increases.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a first reference example for explaining an embodiment of the present invention.
Is a paper feed cassette in which the paper 3 is stacked, 4 is a paper feed roller that feeds the uppermost paper 3 one by one, and 5 and 6 are the photoconductors 7 that form the image forming unit. A registration roller and a pressure roller which are sent with a timing.

The main body 1 is provided with the registration roller 5, and below the registration roller 5, a fixed guide plate 8 is formed which stands upright and forms a first conveying path 9 to the photosensitive member 7. . Further, the right side portion of the fixed guide plate 8 and the side portion of the moving guide plate 10-1 are the second conveyance path 11 to the photoconductor 7.
Is formed.

The moving guide plate 10-1 is provided with a pressure roller 6 at an upper portion facing the registration roller 5.
The rotary support shaft 12 is provided at the bottom. Moving guide plate 1
A cover body 1 for rotatably supporting an intermediate portion of 0-1 and a lower portion thereof by a rotary support shaft 13 to open and close the opening 1a of the main body 1
The link body 15-1 is installed between the intermediate portion 4 and the intermediate portion 4. At both ends of the link body 15-1, as shown in FIG.
Receiving holes 15a and 15b are provided respectively, and
The moving guide plate 10-1 and the cover body 1 with respect to a and 15b
The pins 16 and 17 provided in the middle part of 4 are rotatably fitted without rattling.

In the first reference example having the above-mentioned structure, when it is detected by some means that there is a sheet due to a conveyance trouble in the first conveyance path 9 or the second conveyance path 11 near the registration roller 5, A display means (not shown) or the like informs that effect. When the operator receives this notification and rotates the cover body 14 to open the opening 1a of the main body 1 as shown in the explanatory view of FIG. 3, the link body 15-1 also moves the moving guide plate 10-1 to the cover body 14. By rotating in the same direction to open a part of the first transport path 9 and the second transport path 11, it becomes possible to take out the troubled paper from the outside.

After the trouble paper is taken out, the cover body 14 is rotated in the direction of the opening portion 1a to close the opening portion 1a, and the moving guide plate 10-1 interlocking with the cover body 14 carries out the second conveyance. The path 11 is also closed to allow normal paper transport.

At the time of this returning operation, since the moving guide plate 10-1 and the cover body 14 are connected by the link body 15-1, the moving guide plate 10-1 and the cover body 14 regulate each other. The positioning at the time of return will be performed accurately.

By the way, high dimensional accuracy is required for positioning the moving guide plate and the cover body. FIG. 4 is a configuration diagram of a main part in the second reference example in which good positioning is performed. The configuration of the second reference example different from that of the first reference example is as follows.
At the end of the link body 15-2 on the movement guide plate 10-2 side,
As shown in FIG. 5, a long hole 20 is provided, a pin 16 of the moving guide plate 10-2 is loosely fitted in the long hole 20, and a compression spring is elastically contacted inside the moving guide plate 10-2 and the cover body 14. A contact surface 22 that winds 21 around the outside of the link body 15-2 and abuts on the protrusion 10a of the movement guide plate 10-2.
Is provided on a part of the main body 1. In addition, in the constituent members of FIGS. 4 and 5, the members corresponding to the members of the first reference example of FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted.

In the second reference example having the above structure, the pin 16 of the movement guide plate 10-2 is provided with the elongated hole 20 of the link body 15-2.
Since it is movable inside, the constraint between the movement guide plate 10-2 and the cover body 14 is relaxed. And the movement guide plate 1
0-2 and the cover body 14 return, the movement guide plate 10-2
The protrusion 10a of the movable guide plate 10-2 and the contact surface 22 of the main body 1 are brought into contact with each other to perform positioning, and the compression spring 21 presses the movable guide plate 10-2 to protrude the movable guide plate 10-2 from the main body 1. The positioning is maintained by maintaining the contact state with the first contact surface 22.

FIG. 6 is a block diagram of the essential parts in the third reference example. The third reference example differs from the second reference example in that the link body 15-3 has a receiving hole as shown in FIG. Thirty
And the compression spring 31 is inserted in the storage hole 30,
Further, the moving guide plate 10-3 projects to the portion of the housing hole 30 and receives the pressing force of the compression spring 31.
That is the point. In the constituent members of FIGS. 6 and 7, the members corresponding to those of the second reference example of FIGS. 4 and 5 are designated by the same reference numerals and the description thereof is omitted.

In the third reference example having the above structure, the receiving body 32
The pressing force of the compression spring 31 moves through the guide plate 1
The operation is the same as that of the second reference example except that the movement guide plate 10-3 is positioned in a good position.

FIG. 8 is a plan view of an essential part in one embodiment of the present invention. The structure of this embodiment different from that of the third reference example is that the moving guide plate 10-4 is not provided with the receiving body 32. ,
As shown in FIG. 9, a bearing 40 made of a highly slippery material is provided in the accommodation hole 30 of the link body 15-3, a pressing shaft 41 is passed through the bearing 40, and the movement guide plate 10 is provided at both ends of the pressing shaft 41. -4 is fixed, and the protruding portion 10a of the movement guide plate 10-4 and the contact surface 22 of the main body 1 that contacts the protruding portion 10a are allowed to escape from the central portion of the sheet passing area. , The point installed at the end. 8 and 9
In the constituent members, the members corresponding to the members of the third reference example of FIGS. 6 and 7 are designated by the same reference numerals and the description thereof is omitted.

In the present embodiment having the above-mentioned structure, the pressing shaft 41, which receives the pressing force of the compression spring 31, interposes the contact surface 22 of the main body 1 and the moving guide plate 10 in the moving guide plate 10-4 via the pressing portion 42. By pressing the back surface of the contact portion of the -4 with the protruding portion 10a, the movement guide plate 10-4 is properly positioned. The sliding resistance is small due to the existence of the bearing 40 when the pressing shaft 41 moves in the storage hole 30, and the movement becomes smooth.

The pressing portion 42 is not limited to the installation location of this embodiment, but can be installed at any location in the longitudinal direction of the pressing shaft 41, and the installation location may be determined according to the specifications. Further, the shape and installation state of the pressing shaft 41 are not limited to those of this embodiment.

[0025]

As described above, according to the paper conveying apparatus of the present invention, the opening and closing of the cover body which can be operated from the outside and the opening of the conveying path of the guide plate in the apparatus body are linked by the link body. This makes it easier to take out troubled paper from the transport path. The guide plate can be returned by the cover body even during the returning operation, and the cover body and the guide plate can be accurately positioned at a predetermined position by regulating the positions of the cover body and the link body, which hinders the paper conveyance after the return. Do not give.

The guide plate can be pressed to a predetermined position by the pressing portion of the pressing shaft which receives the pressing force of the spring, and can be positioned at any position within the range of the length of the pressing shaft. The degree of freedom of is increased.

Furthermore, since the movement of the pressing shaft with respect to the link body is performed via the bearing, the movement can be performed smoothly.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first reference example for explaining an embodiment of a paper carrying device of the present invention.

FIG. 2 is a front view of the link body of FIG.

FIG. 3 is an explanatory diagram of an operation of a main part in the first reference example.

FIG. 4 is a configuration diagram of a main part in a second reference example.

5 is a front view of the link body of FIG. 4. FIG.

FIG. 6 is a configuration diagram of a main part in a third reference example.

FIG. 7 is a front view of the link body of FIG.

FIG. 8 is a plan view of a main part in one embodiment of the paper carrying device of the present invention.

9 is a perspective view of a link body portion of FIG. 8. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body of paper feeding device, 1a ... Opening part of main body, 2 ... Paper feeding cassette, 3 ... Paper, 4 ... Paper feeding roller, 5 ... Registration roller, 6 ... Pressure roller, 8 ... Fixed guide plate,
9 ... 1st conveyance path, 10-1, 10-2, 10-3,
10-4 ... Movement guide plate, 11 ... Second transport path, 1
4 ... Cover body, 15-1, 15-2, 15-3 ... Link body, 20 ... Long hole, 21, 31 ... Compression spring,
22 ... Abutting surface, 30 ... Storage hole, 32 ... Receptor, 4
0 ... Bearing, 41 ... Pressing shaft, 42 ... Pressing part.

Claims (2)

(57) [Claims] And 1. A guide plate forming the conveyance path of the paper conveying guide in a predetermined direction, and a cover body for opening and closing the transport path and openings for exposing the transfer system composed of a sheet transport roller or the like to the outside comprising However, in order to enable the opening of the transport path,
A guide plate is movably provided on the main body of the device, and
The cover so that the opening and closing operations of the cover and the guide plate are linked.
In a paper conveyance device in which a link body and the guide plate are connected by a link body, the link body is arranged on both sides of the guide plate,
A long storage hole is provided in the link body in the direction of the guide plate,
A pressing shaft is provided so as to penetrate the storage holes, and a
The pressing shaft is provided with a ring and the elastic force of the spring.
Reciprocating, and the guide plates on both sides of the pressing shaft.
A paper conveyance device, comprising a pressing portion that presses and positions a predetermined position . 2. A sheet conveying apparatus according to claim 1, characterized in that a bearing of the pressing shaft to the link member.