JPH05147798A - Sheet discharge guide device of sheet transport type - Google Patents

Abstract

PURPOSE:To automatically change over the forward/backward discharging direction in accordance with the rigidity of a sheet to be transported by mounting the base end of a movable guide plate at the tail of a sheet transport guide in such a way as possible of swinging oscillatively, and energizing the free end of the movable guide plate using an energizing means into the upward swinging condition. CONSTITUTION:Each document sheet 50 is fed from a table 30 installed ahead of the device body 2, inserted to between guides 26, 36, and transported to a reading sensor 10. This document sheet 50 transported onto a transport guides 28, in case its rigidity is small, gets on the guide plate 54, is guided by an upper discharge guide plate 64, and is guided to ahead of the device body 2 over an upper cover 8. In case the rigidity is large, the sheet 50 depresses the guide plate 54 against the action of an energizing means 58 and is discharged from the back of the device body 2. Accordingly changing-over of the forward/ backward discharging direction of the sheet 50 can be performed automatically in accordance with the rigidity of the sheet 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-conveying scanner, and more specifically, a one-way document conveying path for dropping a document inserted from the front of the scanner body from the rear of the scanner body and a document from the rear side of the body. The present invention relates to a sheet ejection guide device capable of automatically selecting either a reverse return document conveyance path for guiding in a returning direction toward the front of a main body in accordance with the rigidity of a document.

[0002]

2. Description of the Related Art Conventionally, in a sheet driving type scanner, there is known a one-way document feeding method in which a document sheet inserted from the front of the main body is read by a reading sensor in the main body and then discharged from the rear portion of the main body. After reading the original paper inserted from the front with the reading sensor inside the main body, the original is made a U-turn upward from the rear of the main body to the front of the main body, whereby the original is discharged to the front side of the main body. The scheme is known.

[0003]

With respect to the operability of the scanner, after reading the original paper inserted from the front of the main body,
The reverse document transport method that ejects paper to the front side of the main body is excellent, but if the document paper is much thicker than the standard size, or if it is a material such as aluminum-kent paper that does not return when bent, In this case, there is a problem that if the original document is bent by the guiding action of the guide plate in the U-turn direction when the original document returns to the front of the main body, this bending cannot be restored. Further, in the one-way document feeding method, the problem of bending of the document sheet does not occur, but there is a problem that the operability is not good because the document sheet is discharged out of the reach of the operator. The present invention is intended to solve the above problems.

[0004]

In order to achieve the above-mentioned object, according to the present invention, a document is read from the front of the main body 2 on the reading sensor 10 by rotating rollers 18, 20, 32, 34 for conveying paper in the main body 2. In a sheet-conveying type scanner that conveys the original to the reading surface of the main body 2 and further conveys the original to the rear of the main body 2, a movable guide plate 54 that is supported so as to be able to rise and fall behind the main body 2, and the movable guide plate 54 in the discipline direction. A biasing means 58 for biasing to
It has a stopper 60 for locking the movable guide plate 54 in an obliquely standing state, and a guide surface for guiding the original paper 50 guided obliquely upward by the movable guide plate 54 to the front side of the main body 2. A discharge guide plate 64 provided above the movable guide plate 54 and provided on the main body 2 side, and is not suitable for guiding the strength of the biasing force of the biasing means 58 in a curved shape. The pressure is set so that the movable guide plate 54 is pushed down by the pressure in the moving direction of the strong original paper.

[0005]

[Function] The original sheet 50 conveyed to the rear of the main body 2.
Is made of a material that has low rigidity and is suitable for bending, is guided by the movable guide plate 54 in an obliquely standing state, moves obliquely upward, and is further conveyed to the discharge guide plate 64, so that the main body 2 The direction of travel is changed to the front of. Manuscript paper 5
If 0 is a highly rigid material such as aluminum Kent paper,
The original paper 50 pushes down the movable guide plate 54 by the pressure in the traveling direction, passes through the movable guide plate 54, and is discharged to the rear end of the main body 2.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. Reference numeral 2 is a main body of the sheet carrying type scanner, which is composed of a base 4 and an upper cover 8 supported by the base 4. A reading sensor 10 is arranged substantially in the center of the base 4, and the sensor 10 is connected to a controller (not shown) built in the base 4.

Sheet conveyance guides 12 and 14 are provided in front of and behind the reading sensor 10. The reading sensor 10
A transparent reading surface having a sheet supporting surface is provided above the reading unit. Drive rollers 18 and 20 are rotatably supported by the base 4, and these drive rollers 18 and 20 are connected to a drive motor installed in the base 4 via a power transmission mechanism.

The drive motor is configured to be rotationally controlled by a controller. The base 4 includes a front drive roller 18 and a rear drive roller 20 in front of the front drive roller 18.
The sheet conveying guides 26 and 28 are fixedly provided at the rear side of the sheet. Reference numeral 30 denotes a table for sheet conveyance, which is fixed to the front end of the base 4.

Reference numerals 32 and 34 denote front driven rollers and rear driven rollers, which are rotatably and vertically movable on the base 4 and contact the corresponding driving rollers 18 and 20 by their own weight. Reference numerals 36, 38, 40, and 42 are sheet conveyance guides arranged on the base 4, and face the corresponding conveyance guides 26, 12, 14, and 28, respectively. 44
Is a shading plate, through the rotation support shaft 52,
It is axially supported by the side plate of the base 4. A receiving member 46 is fixed to the upper end of the rising portion of the shading plate 44, and the receiving member 46 is brought into contact with the upper surface of the support member fixed to the paper transport guide 40 by the weight of the shading plate 44. There is.

In a state where the receiving member 46 is locked to the supporting member, the white surface of the flat plate portion of the shading plate 44 is parallel to the reading surface on the reading portion of the reading sensor 10 and has a predetermined interval. Facing each other.

Reference numeral 54 denotes a movable guide plate, one end of which is rotatably supported by the main body 2 by a shaft 56. One end of the movable guide plate 54 is adjacent to the rear end of the paper transport guide 28,
The upper surface of one end of the movable guide plate 54 is set to be substantially level with the upper surface of the guide 28. The movable guide plate 54 is biased in a direction in which the open end side stands up by a biasing means 58 composed of a torsion spring. A stopper 60 is projectingly provided on a guide support base 62 fixedly mounted on the cover 8 of the main body 2, and the side portion of the movable guide plate 54 is elastically contacted with the stopper 60 by the urging force of the urging means 58. There is.

The urging force of the urging means 58 is usually set so as to lift the movable guide plate 54 upward. The urging force of the urging means 58 is set so that the movable guide plate 54 is pushed down by the pressing force of the document sheet 50 when the document sheet 50 has a high rigidity when the document sheet is discharged. The urging means is not particularly limited to a torsion spring, and as shown in FIG. 5, the compression coil arranged between the support portion 4a of the base 4 and the lower surface of the movable guide plate 54 is urged by a spring. The means 58a may be configured.

Reference numeral 64 denotes a discharge guide plate fixedly mounted on the guide plate support base, and the lower end of the discharge guide plate 64 faces the upper end of the movable guide plate 64.
The discharge guide plate 64 is formed with a guide surface that is bent toward the front of the main body 2 and guides the original paper 50 above the upper cover 8.

Next, the operation of this embodiment will be described. When the document 50 is manually inserted between the table 30 in the front of the main body 2 and between the guides 26 and 36 and further between the rollers 18 and 32, the document 50 is placed on the reading sensor 10 by the rotation of the drive roller 18 driven by the motor. The document 50 is sent and the document 50 is read here.

The original 50 sent on the conveyance guide 28
When its rigidity is low, it rides on the movable guide plate 54 and is guided by the upper discharge guide plate 64 as shown in FIG.
It is guided toward the front of the main body 2 above the upper cover 8 along the curved surface of the guide plate 64.

The document 50 sent on the transport guide 28
However, when the rigidity is strong, the movable guide plate 54 is pushed down against the urging force of the urging means 58 as shown in FIG.
Is discharged from behind.

[0017]

Since the present invention is configured as described above, there is an effect that it is possible to automatically switch between front and rear ejection of a document according to the rigidity of the document.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a sheet driving type scanner.

FIG. 2 is an external view of a rear portion of a sheet driving type scanner.

FIG. 3 is an explanatory side view of a sheet ejection guide device showing an operation of ejecting a document to the rear of the main body.

FIG. 4 is an explanatory side view of a sheet ejection guide device showing an operation of ejecting a document in front of the main body.

FIG. 5 is an explanatory side sectional view showing another embodiment of the sheet ejection guide device.

[Explanation of symbols]

 2 main body 4 base 8 cover 10 reading sensor 12 guide 14 guide 18 roller 20 roller 26 guide 28 guide 30 table 32 roller 34 roller 36 guide 38 guide 40 guide 42 guide 44 shading plate 46 receiving member 50 original document 54 movable guide plate 56 shaft 58 Biasing means 64 Guide for discharge

Claims (1)

[Claims] 1. A document is conveyed from the front of the main body 2 to a reading surface on a reading sensor 10 by rotation of rollers 18, 20, 32, 34 for conveying paper in the main body 2, and the original is further conveyed.
In a sheet-conveying-type scanner that conveys to the rear of the main body, a movable guide plate 54 that is supported so as to be tiltable behind the main body 2
A biasing means 58 for biasing the movable guide plate 54 in the disciplined direction, a stopper 60 for locking the movable guide plate 54 in an obliquely standing state, and an original document guided obliquely upward by the movable guide plate 54. The movable guide plate 54 has a guide surface for guiding the paper 50 to the front side of the main body 2.
And a discharge guide plate 64 provided on the main body 2 side, the strength of the urging force of the urging means 58 is
A sheet ejection guide device for a sheet conveyance type scanner, characterized in that the movable guide plate 54 is set so as to be pushed down by a pressure in a traveling direction of a document sheet having high rigidity which is not suitable for guiding in a curved shape.