JPH0537793U - Paper transport device - Google Patents

Abstract

(57) [Abstract] [Purpose] The paper is always kept in a stable state and accurately from the upstream paper transport means without processing the guide members with high precision and without reducing the distance between the pair of guide members. To provide a sheet conveying device capable of feeding to a sheet conveying means. A pair of a pair of paper feed rollers 1, 2 arranged upstream in the paper conveyance direction and a pair of paper feed rollers 3, 4 arranged downstream are opposed to each other at a predetermined interval. Guide plates 5 and 6 are provided. A raising member 8 is attached to a surface of the upper guide plate 5 facing the guide plate 6. An elastic body 7 having a small coefficient of friction with respect to the paper P and formed in a thin fiber shape stands upright on the raised member 8, and the tip of the elastic body 7 is formed longer than the interval between the guide plates 5 and 6. And the leading end of the guide plate 6
And is bent in the sheet feeding direction A by contacting the surface facing the guide plate 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper transport device used in a printing device.

[0002]

[Prior Art]

 Conventionally, printing devices have a plurality of pairs of paper feed rollers. The paper is fed to the printing mechanism by the paired paper feed rollers, and after a predetermined character is printed on the paper, the paper is ejected out of the printing apparatus. A guide member for guiding the paper is disposed between these paper feed rollers, and the paper fed from the paper feed roller located on the upstream side in the paper feed direction is regulated by the guide member in the vertical direction of the leading edge of the paper. The paper is fed to the paper feed roller on the downstream side in the paper feed direction without any trouble.

The guide member is often composed of a pair of upper and lower plate-shaped members having a small curvature, and the sheet can be guided more accurately by reducing the distance between the pair of plate-shaped members. However, since plate-shaped members with curvature have low processing accuracy, it is difficult to form a pair of plate-shaped members with the same curvature, and if the distance between them is reduced, some of the guide members may come into contact. There is. Therefore, it is general that the pair of guide members are provided so as to be separated by a predetermined distance which is not so small.

[0004]

[Problems to be solved by the device]

 However, when the paper is fed to the paper feed roller on the downstream side by the paper feed roller on the upstream side, since the predetermined distance is provided between the pair of guide members, the leading edge of the paper is extremely unstable in the guide member. It is in a state. Therefore, there is a problem that the paper reaches the downstream paper feed roller in a state where the paper is inclined with respect to the feeding direction, and the corner of the paper is broken.

The present invention has been made to solve the above-mentioned problems, and always stabilizes the paper without processing the guide members with high precision and without reducing the distance between the pair of guide members. It is an object of the present invention to provide a paper transporting device that can accurately feed the upstream paper transporting means to the downstream paper transporting means.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, a sheet conveying device according to the present invention comprises a plurality of sheet conveying means, a pair of guide members provided between the plurality of sheet conveying means and facing each other with a predetermined gap, and a pair of guide members. One of the guide members is provided with a thin fibrous elastic body extending toward the other guide member.

[0007]

[Action]

 In the paper transporting device of the present invention having the above-mentioned configuration, when the leading edge of the paper sent from the paper carrying means on the upstream side in the paper feeding direction enters the guide member, a large number of elastic bodies provided on one guide member cause The leading edge of the paper is pressed against the other guide member. In this way, the sheet is always pushed to the other guide member in a stable state and accurately fed to the sheet conveying means on the downstream side.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 is a perspective view showing the structure of the paper feeding apparatus of the present embodiment. A paper feeding roller 1 is rotatably supported by a support shaft 1a on a frame (not shown). A paper feed roller 2 is rotatably supported by a support shaft 2a so as to be in contact with 1.

Paper feed rollers 3 and 4 are rotatably arranged on the downstream side of the paper feed rollers 1 and 2 in the paper feed direction (direction shown by arrow A in FIG. 2). The paper feed roller 3 is supported by the frame by a support shaft 3a, and the paper feed roller 4 is supported by the frame by a support shaft 4a so as to contact the paper feed roller 3.

The paper feed rollers 1 and 2 and the paper feed rollers 3 and 4 rotate at the same speed by a drive source (not shown). By this rotation, the paper feed rollers 1, 2 and the paper feed rollers 3, 4 feed the paper P in the paper feed direction while holding the paper P between the rollers. The sheet feeding rollers 1 and 2 and the sheet feeding rollers 3 and 4 constitute the sheet conveying means of the present invention.

As shown in FIGS. 1 and 2, the paper P is guided from the paper feed rollers 1 and 2 to the paper feed rollers 3 and 4 in the frame between the paper feed rollers 1 and 2 and the paper feed rollers 3 and 4. Guide plates 5 and 6 are provided to face each other with a predetermined gap. The guide plates 5 and 6 are formed with a predetermined curvature. The paper P sent to the paper feed rollers 1 and 2 is sent to the paper feed rollers 3 and 4 through between the guide members 5 and 6 by the rotation of the paper feed rollers 1 and 2. The guide plates 5 and 6 form the guide member of the present invention.

Next, the structure of the guide plates 5 and 6 will be described with reference to FIG. As shown in FIG. 1, the guide plates 5 and 6 are attached to the frame so as to face each other at a predetermined interval in the vertical direction. On the surface of the upper guide plate 5 facing the guide plate 6, as shown in FIG. 3, the elastic body 7 formed in the shape of a thin fiber having a small friction coefficient with respect to the paper P stands upright on the resin sheet. The napped member 8 thus formed is attached using a double-sided tape or an adhesive. As shown in FIG. 1, the elastic body 7 is formed to be longer than the space between the guide plates 5 and 6, and its tip end is in contact with the surface of the guide plate 6 facing the guide plate 5. Is bent in the paper feeding direction A.

The operation of the sheet conveying device configured as described above will be described with reference to FIG.

As shown in FIG. 4A, the paper P fed between the guide plates 5 and 6 by the rotation of the paper feed rollers 1 and 2 stands upright from the raising member 8 attached to the guide plate 5. The elastic body is pressed against the surface of the guide plate 6 facing the guide plate 5. Further, if the paper feed rollers 1 and 2 continue to rotate, the paper P is fed while being pressed against the surface of the guide plate 6 facing the guide plate 5, and as shown in FIG. The leading edge is pinched by the paper feed rollers 3 and 4.

As described in detail above, in the sheet conveying apparatus of this embodiment, the elastic body 7 standing upright from the guide plate 5 presses the sheet P toward the surface of the guide plate 6 facing the guide plate 5, Even if the inner plates 5 and 6 have a slightly lower processing accuracy and the space between the guide plates 5 and 6 is not narrowed, the paper P does not tilt or its corners bend, and the paper feed rollers 1, 2 and It is fed by the paper feed rollers 3 and 4.

[0017]

[Effect of the device]

 As is clear from the above description, according to the paper conveying apparatus of the present invention, the paper is always stabilized without processing the guide member with high precision and without reducing the distance between the pair of guide members. In this state, the sheet can be accurately fed from the upstream sheet transporting means to the downstream sheet transporting means.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a perspective view showing a sheet conveying device of this embodiment.

FIG. 3 is a perspective view showing a raised member.

FIG. 4 is an explanatory diagram showing the operation of the paper transport device.

[Explanation of symbols]

 1 Paper Feed Roller 2 Paper Feed Roller 3 Paper Feed Roller 4 Paper Feed Roller 5 Guide Plate 6 Guide Plate 8 Elastic Body

Claims (1)

[Scope of utility model registration request] 1. A plurality of sheet conveying means, a pair of guide members provided between the plurality of sheet conveying means and facing each other with a predetermined gap, and one of the pair of guide members. And a thin fibrous elastic body extending toward the other guide member, and the elastic body presses the sheet conveyed by the sheet conveying means against the other guide member. Transport device.