JP2806762B2 - 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 sheet conveying apparatus for continuously conveying and accumulating a large number of sheets, and more particularly to a driving system thereof.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing an example of a conventional paper sheet conveying apparatus, and FIG. 4 is a bottom view showing the vicinity of an exit of a conveying section in the example of FIG.

As shown in FIG. 3, a conventional sheet conveying apparatus for continuously conveying and accumulating a large number of sheets is provided near a motor 23 of a driving source and an exit of a conveying section. Shaft 1 driven by a motor 23, a first grip roller 21 fixed to the shaft 1 and a transport roller 18
A second grip roller and a second grip roller that rotate in contact with the first grip roller;
And a transport roller 1 fixed to the shaft 2
7 and an impeller 12, a conveyance belt 11 driven by a conveyance roller 17, a conveyance roller 13 and a conveyance roller 16 around which the conveyance belt 11 is wound, and a paper between the conveyance belt 11 driven by a conveyance roller 18. The conveyance belt 10 for sandwiching and conveying the leaves 28, the conveyance rollers 14 and the conveyance rollers 15 around which the conveyance belt 11 is wound, and guiding the insertion of the paper sheet 28 between the conveyance belt 10 and the conveyance belt 11. The guides 4 and 5, the guide 6 for guiding the sheet 28 conveyed by the conveyor belt 10 and the conveyor belt 11, and the stacking for guiding the sheet 28 discharged by the grip rollers 21 and 22 to the stacking unit 7. The guide plate 9, a sheet holding plate 8 for pressing the sheets (stacked sheets) 29 stacked on the stacking unit 7, and a pressing force is applied to the sheet holding plate 8. And a driving pulley 24 mounted on a shaft of the motor 23, a timing pulley 25 mounted on the shaft 1, a timing pulley 24 and a timing pulley 25. Is transmitted to the shaft 1 by the timing belt 26 wound around the shaft 1. Photo sensors 31 and 32 are provided in the vicinity of the shafts 1 and 2 to detect whether or not a sheet is supplied between the grip rollers 21 and 22.

[0004] As shown in FIG. 4, the configuration near the outlet of the transport unit is such that a grip roller 21 and a transport roller 18 are attached to a shaft 1.
And the timing pulley 25 are fixed, and both ends of the shaft 1 are supported by a pair of bearings 30a. On the other hand, the grip roller 22, the transport roller 17, and the impeller 12 are fixed to the shaft 2, and both ends of the shaft 2 are supported by a pair of bearings 30b. The grip roller 21 and the grip roller 22 are in contact with each other, and the rotation of the shaft 1 is transmitted to the shaft 2 via the grip roller 21 and the grip roller 22.

[0005] The paper sheet transport device configured as described above operates as follows.

When the motor 23 rotates in the direction of arrow A, the driving force is transmitted to the shaft 1 via the timing pulley 24, the timing belt 26, and the timing pulley 25, and the grip roller 21 fixed to the shaft 1 and the conveyance The roller 18 rotates. The transport belt 10 is driven by the rotation of the transport roller 18. In addition, the rotation of the grip roller 21 is transmitted to the grip roller 22 of the shaft 2 and the shaft 2 rotates, so that the transport roller 17 and the impeller 12 rotate. The transport belt 11 is driven by the rotation of the transport roller 17.

When a sheet is sent from the outside to the entrance 3 of the conveyance section between the guides 4 and 5, the sheet is nipped and conveyed by the conveyance belt 10 and the conveyance belt 11, and is gripped by the grip rollers 21 and 22. Sent between. The paper sheet 28 sent to the grip rollers 21 and 22 is discharged to the stacking section 7 along the stacking guide plate 9, and its rear end is aligned by being hit by the impeller 12 and stacked in the stacking section 7. You.

At this time, if the sheet 28 is bent, a paper jam may occur. The occurrence of such a paper jam is detected by measuring the passage time of the paper sheet 28 by the photo sensors 31 and 32 and determining that a paper jam has occurred when the passage time exceeds a predetermined time. When the occurrence of a paper jam is detected, the rotation of the motor 23 is stopped by the control unit 34 to stop the conveyance of the paper sheet. Therefore, a certain period of time elapses from the time when the paper jam occurs to the time when the conveyance of the paper sheet is stopped.

[0009]

As described above, in the conventional paper sheet transport apparatus, it takes a certain amount of time from the time when a paper jam occurs to the time when the transportation of the paper sheet is stopped. Even though the leaves are in the transport path, the transport belts 10 and 11 continue to move. For this reason, troubles such as a more severe paper jam and the removal of the transport belt 10 or 11 from the transport rollers 13 to 18 occur. Therefore, the conventional paper sheet transport apparatus has a disadvantage that it takes time to recover when a paper jam occurs, and sometimes the apparatus is damaged.

[0010]

According to the present invention, there is provided a paper sheet transport apparatus comprising: a motor as a driving source; a first shaft driven by the motor; and a first grip roller fixed to the first shaft. And a first transport roller supported on the first shaft via a bearing, a second grip roller that rotates in contact with the first grip roller, and the second grip roller is fixed. A second shaft, a second conveyance roller fixed to the second shaft, a first conveyance belt driven by the first conveyance roller, and the first conveyance belt driven by the second conveyance roller. A second transport belt for nipping and transporting a sheet between the transport belts, a photosensor for detecting that a paper jam has occurred, and a control unit for stopping rotation of the motor based on a signal from the photosensor. With It is.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a bottom view showing the vicinity of an outlet of a conveying section in the embodiment of FIG.

The embodiment shown in FIGS. 1 and 2 uses an idler roller 1 instead of the transport roller 18 of the embodiment shown in FIGS.
The idler roller 19 is supported on the shaft 1 by a bearing 33 and winds around the transport belt 10. Other configurations are the same as those in the examples of FIGS. 3 and 4, and the same reference numerals are given to the same reference numerals.

The operation of the thus configured paper sheet transport apparatus when a paper jam has not occurred is the same as the operation of the example of FIGS. 3 and 4. When a paper jam occurs, the conveyance belt 10 receives resistance, so the idler roller 19
Is rotated by the bearing 33 to prevent a subsequent sheet from causing a paper jam. Therefore, it is possible to prevent the paper jam from becoming more severe, and prevent the transport belt 10 or 11 from coming off the transport roller 13 or the like.

[0015]

As described above, in the paper sheet transporting apparatus of the present invention, the roller for transmitting the driving force of the motor to the transport belt is supported on the rotating shaft by the bearing, and when a paper jam occurs, the roller is used. By causing the rollers to rotate, it is possible to prevent a subsequent paper sheet from causing a paper jam, thereby preventing the paper jam from becoming more severe and preventing the transport belt from coming off the transport roller. Therefore, it is possible to shorten the time required for recovery when a paper jam occurs, and to prevent the apparatus from being damaged.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a bottom view showing the vicinity of an outlet of a transport unit in the embodiment of FIG.

FIG. 3 is a cross-sectional view illustrating an example of a conventional paper sheet transport device.

FIG. 4 is a bottom view showing the vicinity of an outlet of a transport unit in the example of FIG. 3;

[Explanation of symbols]

 1.2 Axis 3 Conveying Port Entrance 4-6 Guide 7 Stacking Unit 8 Paper Sheet Holding Board 9 Stacking Guide Plate 10.11 Conveying Belt 12 Impeller 13-18 Conveying Roller 19 Idler Roller 21 ・ 22 Grip Roller 23 Motor 24 ・ 25 Timing pulley 26 Timing belt 27 Spring 28 Paper leaf 29 Stacked paper leaf 30a / 30b / 33 Bearing 31/32 Photo sensor 34 Control unit

Claims (2)

(57) [Claims] 1. A motor of a drive source, a first shaft driven by the motor, a first grip roller fixed to the first shaft, and supported by the first shaft via a bearing. A first transport roller, a second grip roller that rotates in contact with the first grip roller, a second shaft to which the second grip roller is fixed, and a second shaft that is fixed to the second shaft. A second transport roller, a first transport belt driven by the first transport roller, and transported by nipping a paper sheet between the first transport belt driven by the second transport roller And a second conveyor belt. 2. A motor of a driving source, a first shaft driven by the motor, a first grip roller fixed to the first shaft, and supported by the first shaft via a bearing. A first transport roller, a second grip roller that rotates in contact with the first grip roller, a second shaft to which the second grip roller is fixed, and a second shaft that is fixed to the second shaft. A second transport roller, a first transport belt driven by the first transport roller, and transported by nipping a paper sheet between the first transport belt driven by the second transport roller A sheet conveyance device, comprising: a second conveyance belt that performs the operation, a photosensor that detects that a paper jam has occurred, and a control unit that stops rotation of the motor based on a signal from the photosensor.