JPH089100Y2 - Document feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a document feeder for conveying a document.

[Technical background of the invention]

For example, in a document reversing device as a document feeding device, a lower guide and an intermediate guide provided above the lower guide and having one conveyance path for conveying a document between the lower guide and the intermediate guide are provided. An upper guide that is provided above the guide and includes the other conveyance path for conveying the document between the guide and the intermediate guide, and is rotatably attached to the intermediate guide,
A roller that engages with the document in one of the other transport paths and that transports the document in each of the transport paths in response to this rotation is provided.

In such a document reversing device, the upper guide is placed on the intermediate guide, and the weight of the upper guide causes the document in the other conveyance path to engage with the roller, and the weight of the upper guide, the roller, and the intermediate guide. Then, the roller is adapted to engage with the original document in one of the conveying paths. In this way, the rollers engage with the originals in the one or the other conveying path, so that the originals in the respective conveying paths are conveyed in accordance with the rotation of the rollers.

[Problems of background technology]

In such a document reversing device, when a document jam occurs in the other upper conveyance path, simply
By rotating the upper guide and opening the other conveying path, the jammed document can be easily removed.

However, when a document jam occurs in one of the lower transport paths, the roller is engaged with the document due to the weight of the upper guide, the intermediate guide, and the roller, and the engagement force is very large. There is. Therefore, simply
If you try to pull out a jammed document, the document will be torn. Therefore, when a document jam occurs in one of the transport paths, the intermediate guide and the roller are removed while the upper guide is rotated, one transport path is opened, and the jammed document is removed. I am trying.

As described above, in the conventional document reversing device, the paper jam clearing operation is very troublesome.

[Purpose of device]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a document feeding device capable of easily removing a paper clogging of a document.

[Outline of device]

In order to achieve the above-mentioned object, a document feeding device according to the present invention is an intermediate guide which is provided with a lower guide and one conveyance path which is provided above the lower guide and through which a document is conveyed between the lower guide. And an upper guide which is provided above the intermediate guide and has the other transport path for transporting the document between the intermediate guide and the intermediate guide, and the upper guide is rotatably attached to the intermediate guide. The upper guide includes a rotating body that engages with the original document and conveys the original document in each of the conveying paths in response to the rotation, and a biasing member that biases the rotating body upward. With the upper guide mounted rotatably to open and the upper guide placed on the intermediate guide, the rotating body is made to engage with the original document in each conveyance path and is rotated so as to open the other conveyance path. In the moved state, the rotating body It is biased upward by the force,
It is characterized in that it is not engaged with a document in one of the conveyance paths.

[Example of device]

An embodiment of the document feeder according to the present invention will be described in detail below when it is used in an automatic document feeder with reference to FIGS. 1 to 3 of the accompanying drawings.

As shown in FIG. 1, an automatic document feeder (hereinafter referred to as ADF) is placed on the platen glass 3 of the electronic copying machine 1 capable of double-sided copying.
It is written. ) 5 is detachably mounted.

The ADF 5 includes a separating section 7, a conveying section 9, a reversing section 11 to which an embodiment of the document feeding apparatus of the present invention is applied, and a sheet discharging section 13. The separating unit 7 includes a feeding roller 15 and a tray 17
Is prepared above. Further, the document delivered by the delivery roller 15 is sent along the transport path L0. Here, a paper feed roller 19 and a separating roller 21 are provided at the base end portion of the transport path L0 in the separating unit 7 with the transport path sandwiched therebetween. The paper feed roller 19 is rotationally driven by a paper feed roller motor 23. Further, the separating roller 21 can be brought into contact with and separated from the paper feeding roller 19. This separation roller
The solenoid 21 is driven by a solenoid 25 to move toward and away from it.

On the other hand, at the portion of the transport path L0 in the transport unit 9, that is, at the portion of the transport path L0 on the downstream side in the transport direction of the document from the paper feed roller 19, the transport path L0 is sandwiched. Laura 29
And a pinch roller 31. The pinch roller 31 is attached in pressure contact with the paper feed roller 29.
Further, the transport roller 29 is rotationally driven by the transport roller motor 33.

In the separating unit 7, the originals placed on the tray 17 and fed by the feeding roller 15 are fed by the rotation of the paper feeding roller 19, and are separated one by one by the separating roller 19, and then conveyed by the conveying unit 9. It is designed to be sent to.
Documents are set on the tray 17 with the document surface facing downward.

The transport unit 9 includes a transport belt 39 stretched between a pair of rollers 35 and 37. The original sent out from the separating unit 7 is temporarily registered at its leading edge by the conveying roller 29 and the pinch roller 31, and then is sent onto the platen glass 3 by the rotation of the conveying roller 29, and the platen is conveyed according to the traveling of the conveying belt 39. The glass 3 is moved toward the reversing unit 11. When the document is set at the copy position on the platen glass 3, the conveyance belt 39 stops running and the document is held at the copy position. The original document that has received the copying operation is conveyed again along the traveling of the conveyor belt 39 through the first conveyor path L1 defined between the platen glass 3 and the conveyor belt 39, and is reversed by the reversing unit 11, or Alternatively, the sheet is discharged onto the sheet discharge tray 43 provided above the conveyor belt 39 via the second conveying path L2 provided in the sheet discharge unit 13.

The transport unit 9 includes a frame 45 integrated with the paper discharge unit 13 on the back surface. The frame 45 is rotatably attached to the rear surface of the main body of the copying machine 1 via a hinge.
Therefore, the platen glass 3 is manually operated for each original.
In the case of setting on the upper side, the transporting section 9 and the sheet discharging section 13 are rotated around the hinges to open the platen glass 3.

An opening 47 is formed in a portion of the frame 45 that faces the transporting portions of the first and second transporting paths L1 and L2, that is, the merging portion.

The reversing unit 11 is provided for reversing the original copied on the lower copy surface on the platen glass 2 and placing the original on the platen glass 3 with the opposite copy surface facing downward. . The reversing unit 11 is detachably attached to the copying machine 1 through the opening 47 of the frame 45. This inversion part
11, the tip extends into the opening 47 as shown in FIG.
A lower guide 49 placed on the main body of the copying machine 1, and an upper guide placed on the lower guide 49 so that the upper surface of the lower guide 49 can be opened.
51 and an inversion guide 53 as an intermediate guide sandwiched between the upper and lower guides 49, 51. The upper guide 51 is rotatably attached to the lower guide 49 via a pivot 55.

A space is formed between the front end of the lower guide 49, the rear end of the frame 45 and the front end of the upper guide 51, and a transport guide 57 is provided in the space. The upper part of the space divided up and down by the transfer guide 57 is defined as the third transfer path L3, and the lower part is defined as the fourth transfer path L4.

On the other hand, between the lower guide 49 of the reversing guide 53, a fifth conveying path L5 as one conveying path, and the reversing guide 53
A space between the upper guide 51 and the upper guide 51 is defined as a sixth transport path L6 as the other transport path. The fifth and sixth transport paths L5 and L6 are continuously connected and are formed in a U shape as a whole. The proximal end of the fifth transport path L5 is connected to the fourth transport path L4, and the distal end of the sixth transport path L6 is connected to the third transport path L3. The fifth conveyance path L5 is provided with a document detection sensor S1 for detecting that a document has passed therethrough. At the tip of the lower guide 49 described above, there is provided a conveyance path switching device 59 for controlling the switching of the conveyance direction of the document at the confluence of the first to fourth conveyance paths L1 to L4.

Here, the document sent to the fourth transport path L4 is transported to the third transport path L3 via the fifth and sixth transport paths L5 and L6. Therefore, as shown in FIG.
A conveyance roller 61 is arranged between the end of the reversing guide 53 and the reverse roller 53. At the rear end of the reversing guide 53, a rotating body such as a reversing roller 63 is arranged. The rotating body may be a rotating belt.

Further, the first pressure contact roller 65 engages the document brought to the third transport path L3 with the transport roller 61 to engage the document brought to the fourth transport path L4 with the transport roller 61. A second pressing roller 67 is provided in a state of rolling contact with each of the transport rollers 61 in order to bring them into contact with each other. On the other hand, the upper and lower portions of the reversing roller 63 are in contact with the third and fourth pressure contact rollers 69, 71.

The reversing roller 63 described above is fixedly attached to the support shaft 73. The support shaft 73 is inserted into a first slit 75 formed at the rear end of the reversing guide 53 so as to extend in the horizontal direction. As shown in FIG. 3, the support shaft 73 is inserted into a second slit 77 formed at both ends of the lower guide 49 so as to extend in the vertical direction.
Here, the support shaft 73 is biased upward by a lifting spring 79 attached to the lower guide 49. The lifting spring 79 is composed of a coil spring, and both ends of the lifting spring 79 are attached to a pair of pins 81 provided on the lower guide 49 so as to sandwich the upper portion of the second slit 77, respectively.

The length of the second slit 77 is such that the support shaft 77 has a lifting spring.
When the reversing roller 63 is lifted by the urging force of the 79, the reversing roller 63 is pushed down enough to allow the reversing roller 63 to separate from the fourth pressure contact roller 71 and with the upper guide 51 closed. It is set sufficiently so that the reversing roller 63 comes into pressure contact with the fourth pressure contact roller 71 when it is released.

Further, the urging force of the lifting spring 79 causes the reversing guide 53 to rotate in a state where the upper guide 51 is rotated to open the sixth conveyance path L6.
Also, the reversing roller 63 is the fourth one against the weight of the reversing roller 63.
The support shaft 73 is loaded enough to be lifted away from the pressure contact roller 71 and rotated on the reversing guide 53 so that the upper guide 51 closes the sixth conveyance path L6. The weight is sufficient to allow the reversing roller 63 to engage the fourth pressure contact roller 71.

The paper jam clearance operation of the document in the reversing unit 11 configured as described above will be described below.

The sensor S1 detects that the document has reached the fifth conveyance path L5 via the fourth conveyance path L4. Here, if the first sensor S1 is not turned off although the time sufficient for the document to pass has passed since the first sensor S1 was turned on, the control unit (not shown) controls the fifth sensor S1. It is determined that a paper jam has occurred in the transport path L5. As a result, the control unit
The conveyance operation is stopped, and at the same time, the operator is informed that a paper jam has occurred in the reversing unit 11 via an alarm unit (not shown).

The operator rotates the upper guide 51 of the reversing unit 11 by the alarm from the alarm unit to open the sixth transport path L6. The leading edge of the document having the paper jam is brought to the sixth conveyance path L6.

Here, by rotating the upper guide 51 of the reversing section 11, the weight loaded on the support shaft 73 of the reversing roller 63 is reduced, and the urging force of the lifting spring 79 causes the support shaft 73 to move to the second position. It will be lifted up in the slit 77. This spindle
By lifting 73, the reversing roller 63 to which it is attached is also lifted upward, and this reversing roller 63 is the fourth pressure contact roller.
It will be separated from 71. In this way, the jammed document is released from being pinched by the reversing roller 63 and the fourth pressure contact roller 71, and is freed in the fifth conveyance path L5. Therefore, the operator can easily remove the jammed document by holding the leading edge of the jammed document brought to the sixth transport path L6 and pulling it out.

In this way, after the jammed document is removed,
The upper guide 51 of the reversing unit 11 is rotated so as to close the sixth transport path L6. By the rotation of the upper guide 51, the weight of the upper guide 51 is further loaded on the support shaft 73. Therefore, the support shaft 73 is pushed down against the biasing force of the lifting spring 79, and the reversing roller 63 engages with the fourth pressure contact roller 71. In this state, the next document can be conveyed.

As described above in detail, according to this embodiment, the inversion unit
When a paper jam occurs at 11, the operator simply
Only by rotating 51, the reversing roller 63 and the fourth pressure contact roller 71, which have sandwiched the document jammed in the fifth conveyance path L5, can be separated from each other. In this way, since unnecessary clamping force does not act on the document, it is extremely easy to pull out the jammed document that has been made free, and there is no risk of breaking the document.

This invention is not limited to the configuration of the above-described embodiment, but can be variously modified without departing from the scope of the invention.

For example, in the above-described embodiment, the reversing roller 63 includes the upper guide 51, the reversing guide 53, and the fourth pressing roller 71 against the biasing force of the lifting spring 79 due to the weight of the reversing roller 63.
To engage with. However, without being limited to such a configuration, for example, the urging force of the lifting spring 79 causes the upper guide 51, the reversing guide 53, and the reversing roller 63.
It may be made larger than the weight. In this case, a lock mechanism for holding the upper guide 51 at a predetermined position is required.

Further, the present invention is not limited to the document reversing device, but can be applied to, for example, a conveying device in which the fifth conveying path and the sixth conveying path are not directly connected.

[Effect of device]

As described in detail above, the document feeder according to the present invention comprises a lower guide, an intermediate guide provided above the lower guide and having one conveyance path for conveying the document between the lower guide and the intermediate guide. , An upper guide provided above the intermediate guide and having the other conveyance path for conveying the document between the intermediate guide, and the upper guide rotatably attached to the intermediate guide,
A rotary member that engages with a document in one or the other transport path and transports the document in each transport path in response to the rotation; and a biasing member that biases the rotary body upward.
The upper guide is rotatably attached so as to open the other conveying path, and the rotating body is adapted to engage with the document in each conveying path while the upper guide is placed on the intermediate guide. The rotating body is biased upward by the biasing force of the biasing member in a state of being rotated so as to open the transport path, and is disengaged from the document in one transport path. . In this way, according to the present invention, a document feeding device capable of easily removing the paper clogging of the document is provided.

[Brief description of drawings]

FIG. 1 is a side view schematically showing the configuration of an automatic document feeder using an embodiment of the document feeder according to the present invention, and FIG. 2 is applied to the document feeder of this embodiment. FIG. 3 is a side sectional view showing the structure of the reversing portion, and FIG. 3 is a perspective view showing a mounting state of a lifting spring for urging a support shaft to which a reversing roller is mounted. 49 ... Lower guide, 51 ... Upper guide, 53 ... Reversing guide (intermediate guide), 63 ... Reversing roller (rotating body), 79 ... Lifting spring (biasing member), L5 ... Fifth conveying path (one conveying path) ), L6
… Sixth transport path (other transport path).

Claims (1)

[Scope of utility model registration request] 1. A lower guide, an intermediate guide provided above the lower guide and having one conveyance path for conveying a document between the lower guide, and an intermediate guide provided above the intermediate guide. And an upper guide having another conveyance path for conveying a document between the first guide and the intermediate guide, and the upper guide is rotatably attached to the upper guide and is engaged with a document in one or the other conveyance path. The upper guide is rotatably mounted to open the other conveyance path, and the upper guide is provided with a rotating body that conveys a document in the conveying path and an urging member that urges the rotating body upward. In the state where it is placed on the intermediate guide, the rotating body is made to be able to engage with the document in each conveying path, and in the state where it is rotated so as to open the other conveying path, the rotating body is It is urged upward by the urging force, and Document delivery apparatus characterized by being disengaged to draft.