JPH0231472Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a paper conveying device.

2. Description of the Related Art Generally, in a double-sided copying machine, sheets of paper that have been copied on one side are aligned and stacked on an intermediate tray in preparation for refeeding the sheets for copying on the other side.
Furthermore, even if it is a one-sided copy, if multiple copies are to be made, the sheets are similarly stacked in an aligned state on the intermediate tray.

Here, in order to not limit the size of the paper that can be stacked on the intermediate tray, the paper is transported through a discharge gate device installed above the intermediate tray and equipped with multiple paper discharge sections according to the paper size. Some paper sheets are ejected onto an intermediate tray from a predetermined paper ejecting section. In a device equipped with such a discharge gate device, when a jam occurs in the device, it is difficult to dispose of the jam due to the gate means of the discharge gate device, the intermediate tray below it, and the like.

Purpose This invention was devised in view of the above points, and an object thereof is to obtain a paper conveyance device that can improve jam handling performance in a discharge gate device.

Configuration An embodiment of this invention will be described based on the drawings. First, a sheet of paper 1 on which one side has been copied is fed into the double-sided copying machine by a pair of conveying rollers 2, and a discharge gate device 5 and a discharge gate device for discharging the sheet of paper 1 onto an intermediate tray 3 and a guide table 4. A paper aligning/feeding section 6 and the like are provided for stacking the sheets 1 ejected from the sheet 1 in an aligned state in preparation for feeding when copying onto the other side.

Here, to explain the discharge gate device 5, first, a conveyor belt 9 supported by a driving roller 7 and a driven roller 8 and rotating in the direction of arrow a is provided in a substantially horizontal state. Next, for example, four discharge rollers 10, 11, 12, 13 are provided in contact with the lower surface of the conveyor belt 9, and gate claws 14, 1 are provided between the discharge rollers 10, 11, 12, 13.
5 and 16 are rotatably provided. and,
These gate claws 14, 15, and 16 are rotationally controlled by a solenoid (not shown) to have four discharge positions, and the largest paper is discharged as shown in A, and the smallest paper is discharged as shown in A. If so, it will be released as shown in B. The drive roller 7, driven roller 8, etc. are supported by a pair of support plates 17 to form a unitized conveyance unit 18, and these support plates 17 are fixed to a side plate 19 of the main body of the copying machine. the discharge roller 10,
11, 12, 13, the gate claws 14, 15, 1
6, etc., is a unitized gate unit 21 supported by a pair of side plates 20, and this gate unit 21 is vertically rotatable about the axis of a support shaft 22 provided on one of the side plates 19. Supported. A conveyance path for the paper 1 is provided between the conveyance unit 18 and the gate unit 21.

A locking plate 24 having a locking groove 23 is fixed to the support plate 17, and a locking plate 24 having a locking groove 23 is fixed to the side plate 20.
A stopper 26 to which a pin 25 which is removably engaged with the locking groove 23 is fixed is provided so as to be slidable and biased by a spring 27 in a direction to lock the pin 25 in the locking groove 23. The stopper 26 is provided with a handle 2 for slidingly operating the stopper 26.
8 is fixed. Further, the gate claw 14,
15 and 16 are fixed to a rotation shaft 29 that is rotated by the solenoid, and a protrusion 30 that protrudes downward is formed.

Next, the intermediate tray 3 receives the ejected paper 1.
One end on the front side in the direction of travel is supported by a pin 31 to be rotatable in the vertical direction, and the other end has a spring 32 that urges the intermediate tray 3 upward and a stopper 33 that restricts the range of upward rotation. is provided. Further, a plurality of guide ribs 34 are formed on the intermediate tray 3 and are inclined downwardly along the traveling direction of the paper 1, and the upper edges of these guide ribs 34 are close to the gate unit 21.

The sheet aligning/feeding section 6 is provided with a stopper 35 for aligning the front edges of the sheets 1, and movable fences 36 slidably attached to both ends of the guide table 4 for aligning the side edges of the sheets 1. Further, above the guide table 4, there is a rotating arm 38 that is rotatable around the axis of a support shaft 37, and is supported by the tip of the rotating arm 38 and receives a driving force from a drive unit (not shown). A feed roller 39 that is rotationally driven around the axis is provided.

In such a configuration, the paper 1 fed into the discharge gate device 5 is conveyed along the conveyance path by the rotation of the conveyor belt 9, and is discharged onto the intermediate tray 3 from a predetermined discharge position according to the size of the paper 1. be done.

Here, when a jam occurs in the discharge gate device 5, the stopper 26 is slid in the direction of arrow b shown in FIGS. 3 and 4, and the pin 25 is removed from the locking groove 23. As a result, the gate unit 21 rotates downward about the support shaft 22 as shown in FIG. 6, and the conveyance path for the paper 1 between the conveyance unit 18 and the gate unit 21 is opened. Further, when the gate unit 21 rotates downward, the discharge roller 10 comes into contact with the guide rib 34, and the intermediate tray 3 rotates downward about the pin 31. Therefore, the conveyance path for the paper 1 is further opened, and jam handling performance is improved. Also, when the gate unit 21 is rotated downward, the protrusions 3 of the gate claws 14, 15, 16
0 comes into contact with the guide rib 34, and the gate claws 14,1
5 and 16 are forcibly rotated, and their tips are retracted toward the gate unit 21 side. Therefore, the jamming property is further improved.

The guide ribs 34 provided close to the gate unit 21 prevent the paper 1 from curling when the distance between the gate unit 21 and the intermediate tray 3 is large.

Effects This invention provides a discharge gate device consisting of a conveyance unit and a gate unit as described above.
The gate unit is provided to be freely rotatable in the vertical direction, and as the gate unit rotates downward, the intermediate tray placed close to the bottom of the gate unit is rotated downward, thereby preventing jamming in the discharge gate device. In some cases, it is possible to widen the paper transport path between the transport unit and the gate unit, which has the effect of improving jam disposal performance.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is an overall front view, Fig. 2 is a partially enlarged front view, and Fig. 3 is an enlarged view of the discharge gate device and intermediate tray. 4 is a perspective view showing a further enlarged part of the same, FIG. 5 is a vertical side view showing an enlarged view of the discharge gate device and the intermediate tray, and FIG. 6 is a longitudinal side view showing the discharge gate device and the intermediate tray. FIG. 7 is an enlarged longitudinal sectional side view showing a state in which the gate unit is rotated downward, and FIG. 7 is an enlarged front view showing the gate pawl when the gate unit is rotated downward. DESCRIPTION OF SYMBOLS 1...Paper, 3...Intermediate tray, 5...Discharge gate device, 18...Transportation unit, 21...Gate unit.

Claims (1)

[Scope of utility model registration request] The discharge gate device that conveys the paper and discharges the paper from a discharge position according to its size is divided into an upper conveyance unit and a lower gate unit with the paper conveyance path as the border, and the gate unit is moved vertically. Paper conveyance characterized in that an intermediate tray is rotatably provided, is disposed close to below the gate unit, is supported rotatably in the vertical direction, and is rotatably displaced downward when the gate unit is pushed down. Device.