JPS58135039A - Paper stacking apparatus - Google Patents

Abstract

PURPOSE:To make it possible to remove jammed paper by descending a stacking table only when such jammed paper is present and must be removed, and to make ascent and descent of the stacking table reasonably, in case of a paper stacking unit of a copying machine or the like. CONSTITUTION:When a paper jam is detected by a detecting means 15 provided close to the top part of paper 8, a motor 1 is reversely rotated in compliance with this detected signal to turn a worm wheel 3 in the direction of the arrow line B, and after complete descending of a stacking table 7 is confirmed by a bottom position detecting means 13, the motor 1 is stopped t remove the jam. However, when the detecting means 15 can not detect any jam even if a jam of paper has actually occurred, the stacking table 7 does not descend and it keeps the position of feeding paper.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper stacking device for a paper supply section of a copying machine or the like. In recent years, efforts have been made to link four machines together, but in order to make effective use of their functionality, it is necessary to load a large amount of paper in the paper supply section. There are two copies of paper 9, roll paper and cut paper, in the subject*, but in the case of roll paper, it is necessary to use a large amount of paper for several autumns at a time.

Since the paper must be covered with light, it is heavy and difficult for the user to handle.For this reason, paper is used in general KA-speed copying machines. In the case of cut sheets, they are sent out to the copying process one sheet at a time, starting with the highest sheet of paper in the paper supply section, but as the stack increases, the path through which the paper is fed changes as the number of sheets decreases. "
In order to prevent this, it is necessary to make the loading table movable up and down and raise it as the number of sheets decreases. As a means to raise the loading table as the number of sheets decreases, when the number of sheets is small, a spring is often used to lift it up, but as the number of sheets increases, the load on the spring increases and it becomes difficult to load the paper. Therefore, in machines that load a large number of sheets, the loading platform is raised using a drive source (mainly a motor). In this case, a means is provided to detect the height of the top of the paper, and when the height of the top of the paper decreases, the motor is rotated, and when it reaches an appropriate height, it is stopped and that position is maintained. . This operation is repeated to keep the height of the topmost sheet of paper within a certain range. In such a device, the paper is always in contact with the paper feed means of the paper binding roller, so it is impossible to pull out the loaded paper outside the machine in this state, and if it becomes necessary to do so, The loading platform must be lowered, and if the remaining amount of paper reaches zero or a paper jam 9 occurs, the loading platform must be automatically lowered to replenish the paper and remove the pongee 9 paper. There is.

The purpose of the present invention is to rationally raise and lower the stacking platform in such a paper stacking device, and in particular, to selectively raise and lower the stacking platform depending on the position of the paper jam at 9 o'clock in the paper jam. be.

The present invention provides a paper loading device for supplying paper having a paper loading table which can be raised and lowered, in which when a paper jam occurs, if there is paper to be removed at a portion of the loading table for paper a, the paper is loaded. Hold the stand in the non-paper feeding position and place the paper am
If there is no paper to be removed on the table, the paper loading table is maintained at the paper feeding position.

Hereinafter, the present invention will be described in detail with reference to the drawings. 111
The figure shows one part of the paper loading device of the present invention, and is a perspective view schematically showing its mechanism.

In this embodiment, a loading table 7 on which paper 8 is loaded is shown.
is installed so that it can be raised and lowered, and a motor is provided to move the loading platform up and down. A sprocket 4 is formed coaxially with a worm gear 3 that meshes with a form gear 2 attached to the output shaft of the motor 1, and a chain 6 is stretched between the sprocket 4 and the sprocket 5 provided above it. and the loading platform 7 is connected to this chain 6.
It is given 9. A picker and a probe 9 are in contact with the top of the paper 8, and the paper is fed 9 by the rotation of the picker and is fed into the process of the copying machine.

In addition, in order to detect the top of the paper 8, a detection lever 11 is in contact with the top of the paper, and a lever R12 is used to detect the change.
is provided. When the sheets 8 are fed out one after another and the topmost ^ becomes lower, the motor 1 is rotated by the 0 signal from the detector R12, and the worm wheel 3 is moved in the direction of the arrow M.
The loading platform 7 is rotated and raised, and when it rises to a certain level, the signal from the detection means 12 is cut off and the motor is stopped. When lowering the loading platform 7, the motor 1 is rotated in the opposite direction, the worm wheel 3 is rotated in the direction of arrow B, and the loading platform 7 is lowered.
When the lower detecting means 13 confirms that the lowering of the shaft is completed, the motor is stopped. The presence or absence of paper is detected by a detector ji1.14 provided above and inside the paper. When the signal from the detection means 14 is cut off and it is detected that there are no remaining wrinkles, the motor 1 is rotated in a reverse direction and the loading platform 7 is lowered.

Next, when a paper trench 9 occurs, when the fcMi Yamate R15 provided near the leading edge of the paper 8 detects the presence of υK to D M there, the loading table 7 is lowered by the signal. . However, in the case of the same conclusion, if the detection means 15 does not detect the carriage of the paper 9 there, the loading platform 7 lowers and maintains the overall position of the paper BJ. . That is, during copying +sec, the paper is fed and an image is formed on the paper, and then the paper is ejected to the outside of the machine. (not shown), however, no matter where the paper Nil occurs on the oboro conveyance, the detection means 15 detects the presence or absence of the paper.
so that it descends. Therefore, the installation position of the detection means 15 is a position where it is possible to detect the case where the leading edge of the paper protrudes downstream of the normal position 19 and the case where the trailing edge of the paper remains in the stacking platform elevating section. The area near the tip of No. 8 is best.

FIG. 2 is a view of the paper loading device shown in FIG. 111 from the right side, and the paper 8 is placed outside the machine along the rail 16 provided on the loading platform 7 at the position where the loading platform 7 has completed its descent. It is drawn out and shown as a round shape wA'. In this state, as described above, the operator can easily remove the sheets of paper stuck in the stacking section.

As described above, according to the present invention, when a paper jam occurs, only when there is jammed paper to be removed in one paper stacking section, the stacking section is lowered and the jammed paper can be removed. As a result, there is no wastage in the movement, and for the operator, even though there is no ajar in the loading section to be removed, the loading section has descended and cannot perform the next copying operation until it has finished rising again. You can avoid a lot of inconvenience.

Although the above embodiment has been described with respect to a copying machine, the present invention is not limited to this, and can be applied to other recording devices and other devices that are sequentially fed with stacked sheets.

[Brief explanation of the drawing]

FIG. 1 is a schematic bell view showing one embodiment of the present invention, and FIG.
The figure is a view of FIG. 1 viewed from the right. l...Motor 4.5...Sprocket, trolley...Chain 7...Loading platform 8...Paper
9...Pi, Kur, Prowler lO...Guide 11...Detection lever 12...Upper detector 13...Lower detector 14...Remaining paper amount detection i 15...For 11M9 paper Detector 16...drawer rail

Claims (1)

[Claims] In a paper loading device for feeding paper that has a paper loading table that can be raised and lowered, when paper jam 9 occurs, if there is jammed paper to be removed in the area of the sheet loading table, the sheet loading table is stopped from feeding. □ If there is no jammed paper to be removed in the upper 1st paper position and there is no jammed paper to be removed in the upper 1st paper position, maintain the above paper loading stage at the paper feeding position f: 1g paper stacking device to be used as paper .