JPS6097152A - Paper-sheet transporting apparatus - Google Patents

Abstract

PURPOSE:To prevent aslant advance and clogging of paper sheets by supporting the paper-sheet transport part in a copying machine so as to be opened and closed with respect to a transport surface and allowing the contact state of the transport part with respect to the transport surface to be adjusted, thus obtaining a uniform contact state. CONSTITUTION:The original-copy transporting apparatus 14 of a copying machine is supported onto a copying machine body 10A through a supporting part 70, permitting to be freely opened and closed, and in case of closure, the original-copy transporting apparatus 14 transports the original-copy transported one by one by a separating transporting apparatus 12, to the light exposure position of an original-copy loading glass (transport surface) 10c. In this case, the supporting part 70 is constituted as a hinge, and when the transport apparatus 14 including a frame 40A is opened, the closing of the transport apparatus 14 due to the self-weight is suppressed by allowing a cam follower to be press-attached onto the flat part of a cam by the force of a spring. A stay 43 can be bent in the opening and closing direction by fixing a holder 73 onto the frame 40A and screwing the screw part 72C of an adjusting member 72 into the threaded hole and advancing and retreating the member 72, and an expected purpose can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet conveying device that conveys paper sheets by means of a conveying section that is cantilever-supported so as to be openable and closable with respect to a conveying surface.

[Technical background of the invention and its problems]

An example of this type of sheet conveyance device is a document conveyance device applied to a copying machine.

Figure 1 shows a conventional document conveying device, and the figure (
a) is a sectional view at the leading edge in the document transport direction;
) is a sectional view at the rear end in the document conveyance direction. In each figure, the reference numeral 1 is a main body of a copying machine equipped with an original platen glass IA on which an original is placed.

The copying machine main body 1 includes a transport section 2 that transports the original on the document glass IA, and a transport section 2 that transports the document on the document glass IA.
A support portion 3 is provided which cantileverly support the surface of A in an openable and closable manner.

The conveying section 2 includes two stays, a holder 2B arranged facing away from the two stays, and a pair of belt rollers (Fig. In (a), only one is shown) 2C, a conveyor belt 2D that is movably stretched over the belt roller 2C, and a holder for discharging the document conveyed by the conveyor belt 2D. 2BK and a pivotally supported idle discharge roller 2E. Note that the idle ejection roller 2E is configured to be in contact with a drive ejection roller IB provided in the copying machine main body 1 so as to be able to nip and convey the document.

The support portion 3 is connected to the left side of the copying machine main body 1 and the stay 2, for example.
It is composed of a hinge interposed between the left side of A and the left side of A. This hinge 3 is biased by a biasing member (not shown) so that when the transport section 2 is opened in the direction of arrow A1, it will not open in the direction of arrow A2 due to its own weight.

By the way, the two stays of the conveying section 2 are supported in a cantilever manner by the hinge 3, and the free end side pressure is exerted by the belt roller 2.
A downward load will be applied by structures such as C. Therefore, when the transport unit 2 is opened with respect to the document table glass IA, an upward force is applied to the proximal end sides of the two stays by a biasing member (not shown) built in the hinge 3. Then, a downward force is applied to the free end side of the hinge and balanced. For this reason, the two stays are bent downward, and when the conveyor section 2 is closed in this state, the left side of the conveyor belt 2D lifts up from the surface of the document glass platen, as shown in FIGS. 1(a) and (b). The left side of the idle paper ejection roller 2E is the drive paper ejection roller IB.
and become non-contact.

As described above, in the conventional apparatus, since the contact state of the conveying section with respect to the conveying surface pressure of the document was uneven, there was a problem in that the document was easily fed skewed and the document jammed.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to make the contact state of the conveying section uniform with the conveying surface of paper sheets, and to prevent skewing of paper sheets during conveyance. It is an object of the present invention to provide a paper sheet conveying device that can prevent jams.

[Summary of the invention]

In order to achieve the above object, the present invention includes a conveyance section that conveys paper sheets on a conveyance surface, a support section that supports this conveyance section so as to be openable and closable with respect to the conveyance surface, and a support section that supports the conveyance section in the opening/closing direction. The present invention is characterized in that it includes an adjustment member that can be deflected in an adjustable manner toward the conveyance surface, thereby making it possible to adjust the contact state of the conveyance portion with respect to the conveyance surface.

[Embodiments of the invention]

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

In this embodiment, a description will be given of a method K applied to a copying machine having a function of automatically feeding paper sheets, such as original documents.

FIG. 2 is a schematic perspective view of a copying machine to which an embodiment of the present invention is applied. In the figure, what is indicated by IOA is the main body of the copying machine, and a document feeder 10B is provided on the upper part of the main body of the copying machine. The document feeding device 10B includes at least the feeding device 12.
and a document conveying device 14, which is an embodiment of the present invention. This feeding device 12 is a device that sequentially feeds paper sheets, such as original documents, which have been input in a stacked state, one by one, starting from the outermost layer, such as the top layer. The document conveying device 14 is provided so as to be openable and closable with respect to the copying machine main body 10A, and conveys the document fed by the feeding device 12 to an exposure position and then discharges it to the discharge tray 16. Note that when the feeding device is not in use, the document can be placed manually by opening and closing the document conveying device 14.

Next, the document conveyance system of the document feeder 10B will be explained. FIG. 3 is a schematic sectional view of the document feeding device.

In the figure, reference numeral 20 indicates a mounting table on which originals are placed in a stacked state. The original placed on this mounting table 20 is placed at the arrow B1 shown in FIG. Positioning is regulated by a stopper 21 that can swing in the B2 direction,
When this stopper 21 rotates in the direction of arrow B1 shown in FIG. 3, the document slides diagonally downward under its own weight. Thereafter, when the original is rotated in the direction of arrow B2 shown in FIG. A feed roller 22 is provided that feeds the original forward by contacting the edgemost layer of the pressed original.

Further, there is provided a separation and feeding section 23 which separates the outermost layer of the document from other documents and sends it to the other side by the cooperation of the feed roller 22 and the stopper 21. The sent original is brought into contact with a pair of registration rollers 24A and 24B provided on the other side,
After the timing for conveying the document is determined here, the document is conveyed to the document conveyance device 14. Note that the separation and feeding section 23 transports the original in the feeding direction when a sheet of original is interposed between the take-out roller 23A that applies a conveying force to the original in the feeding direction and the take-out roller 23A. A separation roller 23B that applies a force and applies a conveying force to the documents in the counter-feeding direction when a plurality of documents are interposed between the take-out roller 23A and the separation roller 23B is disposed opposite to the separation roller 23B.

The copying machine main body 10A is provided with an original glass IOC on which an original is placed, and above the original glass IOC, the original transport device 14 is provided so as to be openable and closable. This opening/closing structure will be described later. In the figure, 30 indicates a conveyance unit that conveys the original on the upper surface of the document table glass 14, and includes a conveyance device frame 31 and a pair of belt rollers 3 provided on the conveyance device frame 31, one of which is connected to the drive side.
2A, 32B, this belt roller 32 can run endlessly.
It is composed of a conveyor belt 33 stretched between A and 32B, a suppression roller 34 that presses the outer surface of the conveyor belt 33 against the document platen glass 10C, and an idle conveyance roller 35A that conveys the document conveyed by the conveyor belt. has been done.

Note that the copying machine main body 10A is provided with a drive ejection roller 35B, and when the document conveyance device 14 is closed, it is in contact with the idle paper ejection roller 35AICa so that the document can be nipped and conveyed. Further, a stopper IOD for selectively stopping the document against the conveyance force of the conveyor belt 33 is provided at the forward end of the document table glass IOC in the conveyance direction so as to be rotatable in the directions of arrows C1 and C2.

In the document feeder 10B configured in this way,
The document fed by the feeding device 12 is conveyed by the conveyor belt 33 on the upper surface of the document table glass 10C, and stopped at the exposure position via the stopper IOD. After the exposure is completed, the document is transported forward by the transport belt 33, held and transported by the idle discharge roller 35A and the drive discharge roller 35B, and discharged onto the discharge tray 16. By repeating such operations, the feeding device 12
The originals placed in a stack are sequentially conveyed one by one to the exposure position to be copied by the copying machine main body IOA.

Next, the document conveying device will be explained in more detail.

First, the configuration of the transport section 30 will be explained. FIG. 4 is an exploded perspective view showing the frame structure of the document conveying device. In the figure, 40A indicates a rear frame, 40B indicates a front frame, 41A indicates a right frame, and 41B indicates a left frame, which are assembled into a frame shape using screws or the like. The joint between the rear frame 4OA and the right frame 41A can be reinforced with a lip plate 42A, and the joint between the front frame 40B and the left frame 41B can be reinforced with a lip plate 4.
It can be reinforced by 2B. A pair of stays 43 can be attached between the front frame 40B and the rear frame 40A via screws or the like. In addition,
An upper guide 44 for guiding the upper surface of the document can be attached below the left frame 41B.

FIG. 5 is an exploded perspective view showing the conveyance structure of the document conveyance device. In the figure, what is indicated by 32B is the belt roller;
35A is the idle discharge roller, and the shaft portions of both rollers 35A and 32B are inserted into long holes 40a and 40b provided in the front frame 40B and rear frame 40A. Further, the reference numeral 50 in the figure is a tension lever, and the shaft portion of the belt roller 32B is positioned and pivotally supported by this tension lever 51 via a bush 51.

The bush 51 is engaged with the elongated hole 40a and is movable in the running direction of the conveyor belt 33.

Further, the shaft portion of the idle discharge roller 35A is positioned and pivotally supported in the hole 40b via a bush 52. Note that since the bushing 52 is engaged with a slotted hole 50a provided in the tension lever 50, the tension lever 50 is movable in the running direction of the conveyor belt 33. -Spring hanger 5 provided on CIJ A frame 40A and front frame 40B
4 and a hook 50 formed on the tension lever 50
A tension coil spring 55 can be tensioned between the belt row 1t32B and the belt roller 32B together with the pair of tension levers 50.
, 32B, it is possible to apply optimum tension to the conveyor belt 33. Note that one end of the belt roller 32B and the idle discharge roller 35A is positioned by an E ring 56, and the other end is provided with a stop collar 58 that also serves as a pulley on which the drive belt 57 is stretched.
Positioning is possible by The belt roller 32A
is pivotally supported by the rear frame 40A and front frame 40B via a bush 60, and can be positioned by the E IJ song 1. The pressure roller 34 includes a pressure roller shaft 34A and a pressure roller shaft 34A.
A suppression roller roller 34B rotatably inserted into the suppression roller shaft 34A, an E ring 34C for positioning the suppression roller roller 34B with respect to the suppression roller shaft 34A, and an E ring 34C that supports both ends of the suppression roller shirt 34A so as to be movable up and down. It is composed of a frame 40A and a holder 34D attached to the front frame 40B.

The surface of the busy document platen glass IOC and the drive ejection roller 3
The above-mentioned transport section 30
The support part that cantileverly supports the in an openable and closable manner will be explained. An example of this supporting portion is a hinge 70 shown in FIG. 4, whose bottom surface is attached to the copying machine main body 10A, and whose upper surface is attached to the back surface of the rear frame 40A.

For example, as shown in FIG. 6, this hinge 70 includes a cam 70B fixedly arranged on a fixed holder 70A attached to the main body 10A of the copying machine, and a cam shirt 70 of this cam 70B.
a rotating holder 70D rotatably supported around C;
A cam follower (for example, made of a Delrin plate) 70E is provided to be slidable in the direction of arrow E with respect to the rotating holder 70D, and this cam follower 70
A biasing member 70 that presses B against the outer peripheral surface of the cam 70B.
It is composed of F. The hinge 70 configured in this manner prevents the transport section 30 from closing due to its own weight when the transport section 30 is opened in the F1 direction shown in FIG. That is, the force that can counter the rotational force in the direction of the sixth arrow F2 exerted on the rotation holder 70D by the weight of the conveyance section 30 is applied to the rotation holder 70D.
0D, the cam curve of the cam 70B and the spring constant of the biasing member 70F are selected.

Next, an adjustment member that adjustably bends the conveyance section 30 in its opening/closing direction will be described. The one shown in FIG. 7(a) is an example of the adjusting member 72, in which a stepped portion 72A having a larger diameter than other portions is formed in the middle portion, a notch portion 72B is provided above the stepped portion 72A, and a screw portion is provided below the stepped portion 72A. A portion 72C is formed. As shown in FIG. 7(b), the threaded portion 7
An adjustment member holder 73 having a screw hole 73A screwed into the adjustment member 2C is attached to the back surface of the rear frame 40A.

Furthermore, the stay 43 located above is provided with a locking hole 43A through which the notch 72B is inserted, but through which the stepped portion 72A is not inserted.

When such an adjustment member 72 is rotated and moved in the vertical direction with respect to the adjustment member holder 73, the stay 43 comes into contact with the stepped portion 72AK, and this stay 43 is bent in the opening/closing direction of the conveyance section 3o. It becomes possible to do so.

Next, the functions and effects of the document conveying device will be explained.

First, before adjustment by the adjustment member 72, the conveyance section 30
When the document platen glass IOC is opened, an upward force is applied to the base end side of the stay 43 by a biasing member 70F built in the hinge 70.
A downward force is applied to the free end side of the hinge 7o due to the weight of the conveying section 30, and is balanced. Therefore, the stay 43 is bent downward, and when the conveyance section 2 is closed in this state, the 8th stay 43 is bent downward.
As shown in the figure, the rear frame 40A side is lifted up from the front frame 40B, the left side of the conveyor belt 33 is lifted up from the surface of the document table glass 10C, and the left side of the idle paper ejection roller 35A is the drive paper ejection roller 35B.
and become non-contact. When in such a state,
As shown in FIG. 8('b), the adjustment member 72 is rotated and moved upward with respect to the adjustment member holder 73, and the stepped portion 72A pushes up the stay 43 and bends it upward.

The amount of deflection is the amount necessary for the conveyor belt 33 to uniformly contact the document table glass 10C and for the idle discharge roller 35A to uniformly contact the drive discharge roller 35B.

As a result, it is possible to prevent the document from being skewed or jammed in the transport section 30.

It should be noted that the above embodiment is an example, and it goes without saying that each member can be replaced with another member having the same function.

〔Effect of the invention〕

As is clear from the above description, in the paper sheet conveying device of the present invention, it is possible to make the contact state of the conveying section uniform with the conveying surface of the paper sheets, and the skewing of the paper sheets during conveyance, It has excellent effects such as being able to prevent clogging.

[Brief explanation of the drawing]

Figure 1 shows a conventional document conveying device, and the figure (
a) is a sectional view at the leading edge in the document transport direction;
'l is a cross-sectional view at the rear end in the document conveyance direction; FIG. 2 is a schematic perspective view of a copying machine to which an embodiment of the present invention is applied;
FIG. 3 is a schematic cross-sectional view of the document feeder, FIG. 4 is an exploded perspective view showing the frame structure of the document feeder, FIG. 5 is an exploded perspective view showing the transport structure of the document feeder, and FIG. 6 is an exploded perspective view of the hinge. Figure 7 is a cross-sectional view showing the details, Figure 7 is a perspective view showing the adjusting member, and Figure 8 is a cross-sectional view of the vicinity of the adjusting member.
) are explanatory views of the operation of the document conveying device. 30... Conveyance section, 70... Support section, 72...
Adjustment member, R...conveyance surface. Figure 7 (a) (b)

Claims (1)

[Claims] A conveyance section that conveys paper sheets on a conveyance surface, a support section that supports the conveyance section so as to be openable and closable with respect to the conveyance surface, and an adjustment member that adjustably bends the conveyance section in the opening and closing direction. What is claimed is: 1. A paper sheet conveying device, comprising: an adjustable contact state of a conveying section with respect to a conveying surface.