JPH04255396A - Form post-treatment equipment - Google Patents

Abstract

PURPOSE:To prevent the mistake and stop of the stapling by detecting the thickness of a form bundle discharged onto a bin and changing over and controlling the execution or nonfulfilment of staple operation by the result of the detection. CONSTITUTION:When paper is discharged from a copier, and a fixed number of forms are stacked onto each bin 4 through a distributing roller and aligned completely, a clamper (s clamping moving means) 19 is operated by a solenoid 25, and a form bundle 7 is held between an upper clamping piece 23 and a lower clamping piece 24. the thickness of the form bundle 7 is detected by a holding sensor 21 or a rotary type potentiometer 22 on the holding operation. A control means selects the kind of a binding needle adapted by the thickness of the form bundle 7 detected, decides the execution/nonfulfilment of staple operation, and drives a motor 26 and leads out the form bundle 7 to the staple unit side when it decides execution.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention is applicable to a group of bins provided in multiple stages, and to each of these bins.
a gripping and moving means that grips a part of the stack of sheets that has been sorted and is loaded on each bin and moves it to a position where it can be bound;
a stapling means for stapling a stack of sheets in a position where stapling is possible;
The present invention relates to a sheet post-processing device that includes a moving means for sequentially moving a gripping and moving means and a stapling means in correspondence with bins for which sorting work has been completed.

0002

2. Description of the Related Art The above-mentioned paper post-processing device is installed as an option in, for example, a copying machine to perform simple bookbinding, and recently, devices equipped with various mechanisms and systems have been proposed. In such paper post-processing devices, the stapling operation is performed when the paper stack reaches a predetermined thickness, but conventionally, the paper stack is counted and its thickness is estimated, and the stapling operation is performed based on this. was in control.

0003

[Problem to be Solved by the Invention] However, since there are various types of paper such as thick letters and thin letters, it is difficult to accurately determine the thickness of the actual paper stack just by counting the number of sheets. There was a problem in that if the stack of paper was too thick, the stapling operation could not be performed. Furthermore, even if stapling is possible, if the thickness of the paper stack is not accurately known, the stapling needle of the stapling device may not correspond to the thickness of the paper stack, resulting in inappropriate binding results. . For example, problems such as poor driving or bending of the needle, penetration toward the front side due to the needle being too large, uneven thickness during filing, etc. may occur. The present invention has been made based on this background, and provides a paper post-processing device that can accurately detect the thickness of a stack of paper sheets discharged onto a bin and perform a stapling operation that matches the thickness. The purpose is to

0004

[Means for Solving the Problems] The above object is to provide a group of bins arranged in multiple stages, and a device located on the side of each bin to grasp a part of the stack of paper stacked on each bin. death,
A gripping and moving means for moving to a binding position, a stapling means for binding a stack of sheets at the binding position, and a moving means for sequentially moving the gripping and moving means and the stapling means when sorting work for one bin is completed. In the paper post-processing device, a detection means detects the thickness of the stack of paper gripped by the gripping and moving means, and a stapling operation of the stapling means is controlled to be executed or not executed based on a detection signal from the detection means. This is achieved by first means provided with control means. Further, in the first means, the detection means detects the thickness of the paper stack based on the amount of opening of a pair of grip pieces in a state where the paper stack is sandwiched between the grip pieces of the gripping and moving means. This is achieved by the second means. Furthermore, the above object is such that the first and second means are configured such that a plurality of types of staples of the stapling means can be selected, and the control means controls the stapling means of the stapling means in response to the output of the thickness detecting means. This is achieved by a third means that performs control to selectively switch the type of staple.

[0005]

According to the first means, the detection means detects the actual thickness of the stack of sheets, and the control means switches between execution and non-execution of the stapling operation based on the detection result. According to the second means, the detection means detects the thickness of the paper bundle based on the amount of opening of the pair of gripping pieces. According to the third means, the control means performs control to select the type of staple suitable for the thickness of the sheet bundle of the stapling means, based on the thickness of the sheet bundle output from the detection means.

[0006]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. 1 is a configuration diagram of the paper post-processing device connected to a copying machine, FIG. 2 is a plan view of the paper post-processing device, FIG. 3 is a partially cutaway perspective view of the same, FIG. 4 is a left side view of the same, FIG. 5 is an enlarged left side view of the same. Copy paper 2 sent out from a copying machine 1 is received by a distribution roller 3 and discharged onto a bin 4 for receiving the paper. When the bin 4 receives the paper 2, the drive motor 5 rotates the helical cam 6 to the right or left.
Move bin 4 upward or downward. This operation is repeated to complete a predetermined number of copy paper bundles 7. At this time, the acceptance sensor 8 outputs a signal indicating the completion of acceptance of the paper 2 into the bin 4, and the upper and lower sensors 9 cooperate with the protrusions 11 and 12 provided on the bin connecting member 10 to adjust the upper and lower limiters of the bin 4. fulfills its function. The bin connecting member 10 maintains the mutual relationship between the bins 4 disposed above and below the helical cam 6, and plays the role of relating the protrusions 11 and 12 to the grooves of the helical cam 6. The rotation sensor 13 is a sensor that controls one rotation of the helical cam 6, and the output of this rotation sensor 13 causes the drive motor 5 to perform braking and stopping operations.
This serves to maintain bin 4 in a constant positional relationship. The zigzag wire 14 is stretched between zigzag arms 15 and 16, and swings the bin 4 through a crank and link mechanism 17 that operates in conjunction with one revolution of the helical cam 6, thereby moving the stacked sheets onto the front frame 18. Performs pressing and alignment operations.

[0007] When the items are stacked in bin 4 and the matching is completed,
The clamper (gripping and moving means) 19 for the paper bundle 7
As shown in FIG. 5, the stack of sheets 7 is held with a certain force and pulled out toward the stapling unit 20. In this embodiment, during this pinching operation, the thickness of the paper bundle 7 is detected by a pinch sensor 21 or a rotary potentiometer (volume) 22 shown in FIG. In the case of using the pinch sensor 21, it is possible to determine whether the thickness is less than or greater than that for a predetermined thickness, and if the potentiometer 22 is used, thickness information can be obtained linearly. That is, the paper bundle 7 is held between an upper gripping piece 23 and a lower gripping piece 24 that is rotatably supported on the upper gripping piece 23 and rotated by the operation of a solenoid 25.
Since the potentiometer 22 is connected to this lower gripping piece 24, both gripping pieces 23,
The potentiometer 22 can detect the exact thickness when the paper bundle 7 is compressed and gripped between 24 and 24 while removing curls.

[0008] The clamper 19 is movable toward the bin 4 side and the stapling unit 20 side by forward and reverse rotation of a drive motor 26. 27 is a conceptually shown staple position, and 28 is an anvil for bending the staple. In the embodiment, the staple unit 20 includes a bobbin-shaped needle 30 in which a single wire 29 is spooled and wound.
This conceptually shows a type of paper that is cut to a predetermined length and then bent and bound. In this case, the length can be changed by changing the abutting reference when cutting the needle.

[0009]

According to the invention as set forth in claim 1, the thickness of the paper stack is detected and the execution or non-execution of the stapling operation is switched and controlled based on the detection result, thereby preventing stapling errors caused by the paper stack being too thick. This can prevent the stapling operation from stopping. According to the invention as claimed in claim 2, since the thickness of the paper stack is detected based on the opening amount of the pair of gripping pieces, the influence of wrinkles and curls can be eliminated, making it possible to more accurately detect the thickness of the paper stack. Become. According to the third aspect of the present invention, since the type of staple of the stapling means is selected depending on the thickness of the paper stack, it is possible to perform a stapling operation that is suitable for the thickness of the paper stack.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a paper post-processing device connected to a copying machine.

FIG. 2 is a plan view of the paper post-processing device.

FIG. 3 is a partially cutaway perspective view of the paper post-processing device.

FIG. 4 is a left side view of the paper post-processing device.

FIG. 5 is an enlarged left side view of the paper post-processing device.

[Explanation of symbols]

4 bottle 5 Drive motor 7 Paper stack 19 Clamper 20　Stapling unit 21 Pincer sensor 22 Potentiometer 23 Upper gripping piece 24 Lower grip piece 26 Drive motor 30 needles

Claims (3)

[Claims] Claim 1: A group of bins provided in multiple stages, and a gripper located on the side of each of these bins to grip a part of the stack of sheets stacked on each bin and move it to a binding position. A paper post-processing device comprising a moving means, a stapling means for binding a bundle of sheets at a binding position, and a moving means for sequentially moving the gripping and moving means and the stapling means when sorting work for one bin is completed. , further comprising: a detection means for detecting the thickness of the stack of sheets gripped by the gripping and moving means; and a control means for switching and controlling the stapling operation of the stapling means to be executed or not performed based on a detection signal from the detection means. A paper post-processing device characterized by: 2. The detecting means detects the thickness of the paper stack based on the amount of opening of a pair of grip pieces in a state where the paper stack is sandwiched between the grip pieces of the gripping and moving means. A paper post-processing device characterized in that it is a device for detecting. 3. According to claim 1 or 2, the stapler of the stapling means can be selected from a plurality of types, and the control means controls the stapling needle of the stapling means in accordance with the output of the thickness detecting means. A paper post-processing device characterized by performing control to selectively switch types of staples.