Sheet bundle conveyance apparatus and bookmaking apparatus

Abstract

A sheet bundle conveyance apparatus includes a tray arranged substantially horizontally below a discharge outlet of an image forming apparatus. The tray, including a drive device for lowering the tray to a sheet configuration position, is configured to rise and lower a predetermined distance between a sheet stacking position and a sheet conveyance position below the sheet stacking position. The apparatus further includes a gripping conveyance device configured to convey a sheet bundle received from the tray to a finishing device at a substantially vertical posture and turned a predetermined angle.

Description

technical field [0001] The present invention relates to a post-processing device for image forming devices such as printers, printing machines, and copiers. The present invention relates to loading paper printed by an image forming device on a tray, aligning them in a stack in page order, and binding the stack of paper Together, the bundle conveying device in the bookbinding system and the binding device using it. Background technique [0002] In general, such a device is widely used as a terminal device of an image forming device such as a printer or a printing machine, and is widely used to stack paper on which images have been formed on a page-by-page basis, align them in a booklet, sizing the end faces, and binding them on the cover. Binding system on paper. [0003] In particular, a system is known in which prescribed information is printed as on demand, mounted and bound automatically, and then the edge of the paper is cut and printed in a prescribed book shape at the...

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Problems solved by technology

[0016] For example, in this guide mechanism, like a binding device, in the case where the tray position of the basic horizontal posture is transferred to the sizing position of the basic vertical posture, the trajectory of the transfer is complicated.

[0017] This guide mechanism is not disclosed in the above-listed Patent Document 1, but it includes a guide, which is complicated in order to deflect the paper bundle from a horizontal posture to a vertical posture for conveyance; The structure is also complex

[0018] As in Patent Document 1, in the case of rotating the paper bundle pulled out from the tray in a substantially horizontal direction to deflect its posture, an area for rotation must be required between the paper discharge path and the tray, resulting in an increase in the overall size of the device.

[0019] As above, when conveying a stack of paper through the gripping mechanism in a vertical posture, the gripping force is determined by the size of the gripping parts and the gripping pressure, with In order to prevent problems such as stack posture tilting or paper falling, it is necessary to increase the area of ​​the clamp member and increase the clamping pressure. However, for paper stacks that are smaller in size such as JISB6 size, In the case of large-sized paper such as JISA3 size, the nip area is limited, and in order to increase the nip pressure, there are problems of increasing the size of the drive source such as the motor, actuator, and high power.

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