JPH04272045A - Transfer paper conveying device - Google Patents

Abstract

PURPOSE:To prevent contamination of a copy and generation of a paper jam by providing drive/driven gears, drive roller, conveying. pulley, conveying roller, guide plate and its energizing means, and conveying transfer paper by the drive roller and the conveying roller. CONSTITUTION:A drive gear 6 driven by a drive source, driven gear 7 meshed with the drive gear, drive pulley 9 integrally formed with the driven gear 7, drive roller 10 fixed coaxially with the driven gear 7 and the drive pulley 9 and a conveying pulley 12 with drive power transmitted by a drive belt 23 link-mounted between the drive pulley 9 and the conveying pulley are provided. A conveying roller 11, fixed coaxially with the conveying pulley 12, driven gear 7 and the drive pulley 9 are rotatably supported and also providing a guide plate 4, rotatably supported with a supporting point 21 on a frame 1 serving as the center to guide transfer paper P, to convey the transfer paper P by the drive roller 10 and the conveying roller 11.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applied to a transfer paper processing device such as a sorter, which is arranged downstream of an image forming apparatus such as a copying machine to receive transfer paper, and which is arranged further downstream of the image forming apparatus, such as a copying machine. The present invention relates to a transfer paper conveyance device for delivering and delivering transfer paper.

0002

[Prior Art] In recent years, a large number of peripheral devices, such as sorters and sorter staplers, have been developed that are closely connected to copying machines to sort and staple a large number of copies for the purpose of mass copying and improved operability. There is. FIG. 5 shows conventional examples of such peripheral equipment, where (a) shows a standard type copying machine 200, and (b) shows a low-volume type that is closely connected to the paper output section 30 of the copying machine 200. sorter 300
It shows the loaded state. In order to provide small and inexpensive copying machines, copiers are produced in a wide variety of types, and therefore the peripheral equipment connected to these copiers, such as sorters, is not necessarily compatible with a specific copying machine, but rather in a wide variety of types. It is often developed to be compatible with copying machines.

0003

[Problems to be Solved by the Invention] When such a peripheral device is connected to a copying machine, the conveyance speed of transfer paper between the peripheral device and the copying machine often does not match, and normally the conveyance speed of the peripheral device is not the same as that of the copying machine. It is designed to be faster than that of . If a peripheral device is connected to the copying machine in this state, the receiving roller on the peripheral device side will pull the transfer paper ejected from the copying machine, and the paper ejecting roller of the copying machine or the receiving roller of the peripheral device will be pulled. The transfer paper is slid and conveyed, and a slipping drive state occurs between the drive pulley of the drive mechanism and the drive belt. If the apparatus is used while such an abnormal slippage phenomenon occurs, the copies may become contaminated or the drive transmission mechanism may deteriorate over time and become unstable, resulting in paper jams. The present invention has been made to solve such problems,
For example, even if two transfer paper processing devices equipped with an internal transfer paper conveyance mechanism, such as a copying machine and its peripheral equipment, have different transfer paper conveyance speeds, the conveyance speed of the transfer paper connected and conveyed between them is different. It is an object of the present invention to provide a transfer paper conveying device that does not cause copy contamination or paper jams.

0004

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a first means that includes a drive gear driven by a drive source, a driven gear that meshes with the drive gear, and a driven gear that meshes with the driven gear. A drive pulley and a drive roller fixed on a rotation shaft, a conveyance pulley to which driving force is transmitted by a drive belt stretched between the drive pulleys, and a conveyance roller fixed on the rotation axis of the conveyance pulley. , a guide plate that pivotally supports the driven gear rotating shaft and is rotatably supported around a fulcrum on the frame to guide the transfer paper; and a guide plate that extends in a direction in which the driving gear and the driven gear mesh The apparatus includes a biasing means for biasing the plate, and the transfer paper is conveyed by the drive roller and the conveyance roller. Further, the second means is the same as the first means in which the fulcrum on the frame is located downstream from the shaft support position of the driven gear rotating shaft. Furthermore, the third means is configured such that when the conveyance roller in the second means pulls the transfer paper conveyed downstream with a predetermined force,
The guide plate is configured to rotate in a direction that releases the engagement between the driven gear and the driving gear against the urging force of the urging means.

[0005]

[Operation] When the drive gear driven by the drive source rotates, it rotates the driven gear that meshes with the drive gear, and further rotates the drive pulley and drive roller that are fixed coaxially with the driven gear. On the other hand, the conveyance pulley rotates the conveyance roller by receiving driving force from a drive belt stretched between the drive pulleys. The drive roller and the conveyance roller rotate and convey the received transfer paper. When the conveyance roller pulls the conveyed transfer paper downstream with a predetermined force, the guide plate resists the urging force of the urging means and releases the engagement between the driven gear and the driving gear around the fulcrum on the frame. Rotate in the direction you want.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of the transfer paper conveyance device of the embodiment, FIG. 2 is a schematic cross-sectional view of a section passing through the drive roller axis and the conveyance roller axis, and FIG. 3 similarly shows the action and reaction of the drive gear and driven gear. FIG. 4 is a rear view of the entire apparatus when the transfer paper conveyance device is connected between the copying machine and the sorter. As shown in FIG. 4, in order to make the entire apparatus compact, a transfer paper conveying apparatus 100 is installed in a copying machine 20 equipped with a conventional low-volume type sorter 300.
It is arranged at a position closely connected to the paper discharge section 30 of the copying machine 200, receives the transfer paper discharged from the copying machine 200, and delivers it to the large-volume type sorter 400 closely connected downstream.

In FIGS. 1 to 3, 1 is a frame;
2 is a side plate parallel to the frame 1; 4 is an upper guide plate fixed to the frame 1 and guides the transfer paper P; 5 is the frame 1
A lower guide plate 6 is rotatably supported by a support shaft 21 fixed to the support shaft 21 and guides the transfer paper P together with the upper guide plate 4. The lower guide plate 6 is supported rotatably by the frame 1 and the gear bracket 3 and is driven by a drive source (not shown). A drive gear that transmits force, 7 a driven gear that meshes with the drive gear 6 and rotates, 8 an idle gear that also meshes with the drive gear 6 and transmits driving force from a drive source (not shown), 9 a driven gear Drive pulley integrated with 7, 10
is a drive roller fixed coaxially to the rotating shaft of a driven gear 7 supported by the lower guide plate 5 via a bearing 15. In addition, 12 is a drive belt 2 stretched between drive pulleys 9.
3 is a transport pulley to which driving force is transmitted; 11 is a transport pulley 1 supported by the frame 1 via a bearing 16;
Conveyance rollers 13 and 14 coaxially fixed to the rotating shaft of No. 2 are a drive roller 10 and a conveyance roller 11, respectively.
first and second driven rollers, 17
and 18 are the first and second driven rollers 13, respectively.
, 14, bearings 19 and 20 support the bearings 17 and 18 on the frame 1 via a support mechanism (not shown), and also support the first and second driven rollers 13 and 14, respectively, on the drive roller 10. and conveyance roller 11
A spring 22 is wound around the support shaft 21 and has one end supporting the lower end of the lower guide plate 5 and the other end supporting the side end of the frame 1 to support the lower guide plate 5 with the support shaft 21 as a fulcrum. A release spring biases in the clockwise direction; 24 is a pair of discharge rollers of the copying machine 200 that discharges the transfer paper P; and 25 is a pair of receiving rollers of the sorter 400.

The operation of the transfer paper conveying device 100 will be explained. First, when the copying machine 200 and the sorter 400 have the same transfer paper conveyance speed, the driving force of the drive gear 6 is applied to the driven gear 7, which rotates in mesh with the copying machine 200 and the sorter 400, as shown in FIG. 3(a). exerts f1. Action f1 applied to driven gear 7
acts to give a clockwise rotational moment to the lower guide plate 5 via the driven gear 7, so the lower guide plate 5 is supported at a predetermined position and the drive gear 6
The driving force is reliably transmitted from to the driven gear 7. Of course, the drive roller 10 and conveyance roller 11 that receive the transfer paper P from the copying machine 200 and deliver it to the sorter 400,
The sliding conveyance of the transfer paper P and the first and second driven rollers 13 and 14 that rotate in opposition to them, and the drive belt 23
A slipping drive state does not occur between the driving pulley 9 and the conveying pulley 12 and the driving belt 23, which are stretched between them. Next, when the transfer paper conveyance speed of the sorter 400 is higher than that of the transfer paper conveyance device 100, the receiving roller pair 25, which grips the leading edge of the transfer paper P that has passed the paper ejection roller pair 24, pulls the transfer paper P, and the drive roller 10 and Conveyance roller 1
1. First and second driven rollers 13 that are in contact with them
, 14 at a faster speed than the rotational speed of their drive sources. At this time, as shown in FIG. 3(b), the driven gear 7 exerts an action f2 on the driving gear 6. The driven gear 7 receives a reaction f3 from the drive gear 6 and applies a counterclockwise rotational moment to the lower guide plate 5. When the rotational moment due to the traction force of the transfer paper P exceeds the elastic force of the release spring 22, the lower guide plate 5 rotates counterclockwise, and the driven gear 7 is released from meshing with the drive gear 6. . At this time, the drive roller 10 and the conveyance roller 11 interlocked with it via the drive belt 23 become freely rotatable, so that the transfer paper P is transferred to the receiving roller pair 25.
The material is conveyed according to the rotational conveyance speed of . In this way, the rotational conveyance speeds of the drive roller 10 and the conveyance roller 11 are appropriately adjusted by the release mechanism using the above-mentioned release spring 22, so that the transfer paper conveyance speeds of the sorter 400 and the transfer paper conveyance device 100 are different. Also, there is no possibility of slipping conveyance between each roller and the transfer paper P, or a slipping drive state between each pulley and the drive belt 23. In this embodiment, the lower guide plate 5 is molded using resin in order to ensure smooth movement due to elasticity, but it may be formed using other materials. Further, although the driving force from the drive system of the copying machine 200 is used as the driving source for driving the driving gear 6, an independent source may of course be used. Furthermore, although the paper detection sensor is provided near the paper ejection roller pair 24 of the copying machine 200 and the receiving roller pair 25 of the sorter 400, it may be provided separately at an appropriate location within the transfer paper conveyance device 100. . In FIG. 4, it is also possible to use the sorter 400 with it removed, in which case the conveyance roller 1
1 (second driven roller 14) serves as a paper ejection roller for the entire apparatus, and even if a finger is caught between them, injury can be prevented.

[0009]

As explained above, according to the present invention, when a traction force of a predetermined magnitude or more is applied to the downstream side of the transfer paper, rotational force is applied to the drive roller and conveyance roller that convey the transfer paper. Since it has a mechanism to release the mesh between the driving gear and the driven gear to be transmitted, the paper ejection roller or receiving roller of the transfer paper processing device at the front or rear stage slides and conveys the transfer paper, and the drive mechanism of the transfer paper conveyance device There is no slippage between the drive pulley and the drive belt, which prevents copying from becoming contaminated and paper jams from occurring.

[Brief explanation of the drawing]

FIG. 1 is a front view of a transfer paper conveying device according to an embodiment.

FIG. 2 is a schematic cross-sectional view of a cross section passing through the drive roller axis and the conveyance roller axis.

FIG. 3 is an explanatory diagram showing the action and reaction of the driving gear and driven gear.

FIG. 4 is a rear view of the entire apparatus when a transfer paper conveyance device is connected between a copying machine and a sorter.

FIG. 5 is an explanatory diagram showing a conventional copying machine and a state in which a low-volume type sorter is loaded in the copying machine.

[Explanation of symbols]

1 Frame 4 Upper guide plate 5 Lower guide plate 6 Drive gear 7 Driven gear 8 Idle gear 10 Drive roller 11 Conveyance roller 12 Transport pulley 13, 14 Followed roller 17,18 Bearing 19,20 Spring 21 Support shaft 22 Release spring 23 Drive belt 24 Paper ejection roller 25 Receiving roller

Claims (3)

[Claims] 1. A drive gear driven by a drive source, a driven gear that meshes with the drive gear, a drive pulley and a drive roller fixed on a rotating shaft of the driven gear, and a drive gear that is hooked between the drive pulley. A conveyance pulley to which driving force is transmitted by a passing drive belt, a conveyance roller fixed on the rotation shaft of the conveyance pulley, and a conveyance roller that pivotally supports the driven gear rotation shaft and rotates around a fulcrum on the frame. a guide plate that is movably supported and guides the transfer paper; and a biasing means that biases the guide plate in a direction in which the drive gear and the driven gear mesh with each other, and the drive roller and the conveyance roller A transfer paper transport device that transports transfer paper. 2. The transfer paper conveying device according to claim 1, wherein the fulcrum on the frame is located downstream of the shaft support position of the driven gear rotation shaft. 3. In claim 2, when the conveyance roller pulls the conveyed transfer paper downstream with a predetermined force, the guide plate resists the biasing force of the biasing means and pulls the driven gear and the drive gear. A transfer paper conveying device characterized in that it rotates in a direction that releases meshing.