JPS62116466A - Sheet feeding device - Google Patents

Abstract

PURPOSE:To minimize waste of remaining sheets, by a method wherein a final end detecting means for a sheet in roll is located up a line from a cutter, and the final end detecting means and a cutter are spaced away from each other by a distance longer than the minimium size of a cut sheet. CONSTITUTION:Delivery rollers 5 and 5' and feed rollers 8 and 8' are started, a sheet 1 in roll is cut to specified lengths by a cutter 7, and the cut sheets are fed to a main processing device. When the final end of the sheet 1 in roll is detected by a final end detecting means 9, the driving sources 11 of the deliv ery rollers 5 and 5' and the feed rollers 8 and 8' are stoppd, and the feed of the sheet to the main processing device is stopped. If a distance A between the final end detecting means 9 and the cutter 7 is same as the minimum size of the cut sheet, even the maximum size of the sheet remaining in a machine at a point of time when a conveyance system is stopped is A+ a maximum cut size, and the minimium size thereof is A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device that sequentially cuts roll paper into desired sizes and supplies the cut sheets to a main processing device such as a copying machine.

[Background of the invention]

Generally, roll paper is sequentially cut into desired sizes.

In the paper feeding device that supplies cut paper to the main processing device such as a copying machine, the size to be cut is not constant, so
It is difficult to make the total length of the roll paper an integral multiple of the specified size. Therefore.

It was inevitable that the paper size at the end of the roll paper would be an intermediate length. This has caused problems such as falling off the transport path inside the machine or jamming. As a countermeasure to this problem, the conventional method was to fix the end of the roll paper to the core and make it impossible to feed the roll paper before reaching the end. The work was time-consuming, and the productivity of the roller paper decreased, which was undesirable.3 [Object of the Invention] This invention is intended to solve the above-mentioned problems, and the purpose of this invention is to create a roll paper whose end is not fixed to the core. It is an object of the present invention to provide a paper feeding device that prevents paper of an intermediate size at the end of the paper from being supplied to a main device.

[Structure of the invention]

In order to achieve the above object, the present invention provides a paper feeding device equipped with a cutter that sequentially cuts roll paper into desired sizes, and includes a means for detecting the end of the roll paper upstream of the cutter, and detects the end of the roll paper using the detection signal. In addition to stopping the system, the distance between the end detection means and the cutter is set to be greater than the minimum size of cut paper, so that waste of remaining paper can be minimized.

(Embodiments) Next, the present invention will be described based on embodiments shown in the accompanying drawings.

In the figure, ■ is a roll of paper, such as a photosensitive material, rolled up without fixing the end to the core 2, and 3 is a cartridge that stores the roll paper 1. If it is made of a material, it has sufficient light-shielding performance, and its outlet portion 4 extends in a beak shape in the direction of extraction. 5.5' is the outlet 4 of the cartridge 3
7 is a cutter for the roll paper 1, and the core blade 7 is composed of a movable blade 7a and a fixed blade 7b. 7a
On the downstream side, the In feeding system of the roll paper 1 is activated by detection signals from a plurality of leading edge detection means (not shown) for detecting the leading edge of the roll paper 1 provided on a path leading to the main processing device (not shown). When it stops, it operates in a predetermined manner so that the roll paper 1 can be cut into cut sheets of a desired size. The tip detection means can be selected in several stages from the maximum size to the minimum size by operating a numeric keypad or the like.

8. 8' is a delivery roller installed downstream of cutter 7.
The delivery rollers 8, 8' are for delivering the cut paper 1' cut by the cutter 7 toward the main processing device.

Reference numeral 9 denotes a terminal end detecting means for the roll paper 1 for detecting that the roll paper 1 has been completely fed out from the core 2. and is installed at a position p spaced apart from the minimum size A of the cut paper. The end detection means 9 is constituted by a microswitch equipped with an actuator 9a, and the actuator 9a is connected to the outlet portion 4 of the cartridge 3.
It is provided so as to contact the roll paper 1 through the through hole 1.0. As this end detection means 9, an actuator 9a is used.
The reason for applying the micro-sinch having the following is to take into account the case where the roll paper 1 is a photosensitive material, but if a photosensitive material is not used, a light source such as a photosensor may be used.

Reference numeral 11 denotes a drive source for the feed rollers 5, 5' and the feed rollers 8, 8', which are the conveyance system for roll paper and grated paper. f by the 8 end detection signal
It's starting to stop. That is, when the roll paper 1 in the cartridge 3 is completely unwound from the core 2 and this is detected by the end detection means 9, the paper feeding to the main processing device is immediately stopped. This drive source 11 is the roll paper 1
As described above, it is stopped by the detection signal from the tip detection means.

Further, a paper out indicator 12 which indicates that there is no paper in the cartridge 3 can be activated by the end detection signal from the end end detection means 9, and a paper out indicator 12 which indicates that there is no paper left in the cartridge 3 can be operated by the end detection signal. It is also possible to operate the pressure release mechanism 13 of the conveyance system, that is, in the case shown, the delivery roller 5.5'.

In the above embodiment, when the paper size is specified by operating the numeric keypad or the like and the start switch (not shown) is pressed, the feed roller 5.5' and the feed roller 8.8' start, and the roll paper 1 cutter 7 for each specified size.
The cut paper is then fed to the main processing unit. When the end of the roll paper 1 is detected by the end detection means 9 as shown from the two-dot chain line to the solid line in FIG. stops, and paper feeding to the main processing device is immediately stopped.In this case, the end detection means 9 detects that if the distance A from the cutter 7 is the same as the minimum size of the cut paper,
The largest remaining paper left in the machine when the conveyance system stops is the "maximum cut size," and the smallest paper is "A (minimum cut size)." Then, at the same time as the conveyance system stops, the feed roller 5 on the upstream side of the cutter 7
, 5' are released, it becomes easy to take out the remaining paper and insert a new roll paper.

〔Effect of the invention〕

As described above, the present invention provides a paper feed bag and a machine equipped with a cutter for sequentially cutting roll paper into desired sizes, and includes a means for detecting the end of the roll paper upstream of the cutter, and a link between the end detecting means and the cutter. The feature is that the distance is greater than the minimum size of cut paper, so the paper at the end of the roll paper is not transported to the main processing device at an unreasonable length and falls off the transport path in the two machines. In addition, since the remaining paper is within the range of the A1 maximum cut size to the minimum cut size, it is possible to minimize the waste of the remaining paper. Therefore, there is no need to fix the end of the roll paper to the core as in the past and make it impossible to feed out the roll paper before reaching the end. It has various excellent effects such as improved performance.

[Brief explanation of drawings]

The figures show an embodiment of the invention, with FIG. 1 being a schematic cross-sectional view;
FIG. 2 is a cross-sectional view when detecting the end. 1-Roll paper 3-Cartridge 5.5'...Feeding roller (conveyance system) 7-Cutter 8.8'-Output port-ra (conveyance system) 9-End detection means 11-Drive unit 12-Paper out display Device 13 - Crimp release mechanism patent Applicant: Konishiroku Photo Industry Co., Ltd.'-) Figure 1 Figure 2

Claims (4)

[Claims] (1) In a paper feeding device equipped with a cutter that sequentially cuts roll paper into a desired size, an end detection means for the roll paper is provided upstream of the cutter, and the distance between the end detection means and the cutter is determined by the length of the cut paper. A paper feeding device characterized by being spaced apart by a minimum size or more. (2) The paper feeding device according to claim 1, further comprising a conveyance system that stops upon receiving a detection signal from the end detection means. (3) The paper feeding device according to claim 1 or 2, further comprising an indicator that indicates a paper out state based on a detection signal from the end detection means. (4) The sheet feeding device according to any one of claims 1 to 3, characterized in that a conveyance system that releases pressure bonding in response to a detection signal from the end detection means is provided upstream of the cutter.