JPH0117543Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device that sequentially supplies sheets to a main body processing device of a copying machine, a printing machine, or other office equipment.

In this type of paper feeding device, sheets stacked and stored on a paper tray are sequentially delivered from the topmost sheet to the main processing device side by a sheet feeding means such as a roller or an endless belt.

However, these sheets of paper loaded and stored in large quantities are stored in a predetermined position on the paper tray, and if they are sent to the main processing device while being skewed, mistakes may occur.
This may lead to defective processing such as misprints or accidents such as jamming.

Therefore, guide walls are provided on the left and right edge surfaces or the rear edge surface of the paper on the paper stack, and these guide walls regulate the paper on the paper stack.

Conventionally, this regulation guide has a plurality of guides arranged at positions corresponding to the paper size, and the paper is positioned by standing up the one of the paper size to be used and laying down the others. has been disclosed.

The structure of the regulation guide according to the above publication is shown in FIG. As shown in Figure 1, the guide piece of the regulation guide is
A click mechanism is used to maintain the lying and standing postures, and when storing paper, the guide piece is raised and lowered in advance before being stored.

However, in paper feeders equipped with such conventional regulation guides, it is necessary to raise and lower the guide pieces before replenishing paper, and paper must be inserted between the left and right guide pieces that match the paper size. Doing so may damage the corners of the paper.
In particular, the regulation guide that regulates the trailing edge of the paper obstructs paper storage and makes it difficult to quickly replenish paper.

On the other hand, there is a method in which a recess is provided in the paper mounting table, a guide piece is inserted into the recess, and the guide piece protrudes upward after the paper is placed on the paper mounting table. Sometimes, the paper can be placed smoothly without getting in the way, but on the other hand, if you forget to operate the guide piece to protrude and raise the paper loading table, the stacked paper may slide and fall, or the edge of the paper may fall while feeding. There were problems such as uneven edges and misprints.

The present invention was devised in view of the problems in the prior art, and provides a regulation guide that allows the paper to be erected after it is placed on the paper tray, and in which the guide piece does not forget to erect. The object of the present invention is to provide a paper feeding device having the following features.

In order to achieve such an objective, the present invention has a paper feeding device in which sheets are stacked and stored on a paper loading table in the device frame, and the paper feeding device sequentially feeds out sheets while raising the paper loading tray. is rotatably supported on the paper loading table or the device frame, and is provided with a regulation guide piece that determines the position of the paper that can be raised and lowered along the edge surface of the paper on the paper loading table, A detecting means for detecting the undulating state of the guide piece is provided, and while the detecting means is detecting the undulating state of the regulating guide piece, the paper mounting table is prohibited from rising.

When loading paper onto the paper stacking table, the regulation guide piece is in a reclined state, so it does not interfere with paper insertion, and if you forget to raise the regulation guide piece, you will not be able to start the paper. Even if the guide piece has a detection means, and when detecting the collapsed state,
Since the paper is not regulated by the signal from the detection means, the paper mounting table does not rise, and the paper does not collapse.

An embodiment of the present invention will be described below based on the following.

Figures 3A and 3B show an embodiment of the present invention.

In this embodiment, the paper mounting table 1 has a slit 11, and a slider 13 is vertically provided on the device frame 10 so as to be movable in the direction of the slit 11 provided in the paper mounting table 1. The regulation guide piece 3 is rotatably supported around a pin 12.

In the upright state, the regulation guide piece 3 stands high above the paper tray as shown in FIG. It is designed so that it can be regulated.

In addition, as shown in FIG. 3B, in the laid down state, the regulation guide piece 3 is recessed into the slit 11 and is housed at a low enough level that it does not interfere with the insertion of paper.

A micro switch 14 serving as a detection means is disposed at the base of the regulation guide piece 3, and its actuator is in contact with the base end of the regulation guide piece 3.

For example, the relationship between the microswitches 14 is as follows.

That is, the micro-switches 14 of the regulation guide pieces 3 disposed for the side edge surfaces are in a logical product relationship with each other, and the micro-switches 14 of the respective side edge surfaces,
The microswitches on the trailing edge side are in a logical product relationship.

When the paper is inserted into the regulation guide piece 3 configured as described above, both the side edge surface and the rear edge surface are laid down, and the micro switch serving as the detection means is also in the OFF state, so that the paper can be inserted without any obstruction. It can be placed on the paper mounting table 1.

Even after storing the paper, if the regulation guide piece 3
If you neglect to stand up, the paper feeder will not operate even if you press the start button.

Further, for example, even if one forgets to raise either the side surface side or the rear edge side, the apparatus may be prevented from starting by putting the two into a logical product relationship.

The regulation guide piece 3 stands up and the micro switch
Only when it is turned ON will the paper platform be allowed to rise.

In this paper feeding device, the regulation guide piece that regulates the edge surface of the paper on the paper stack is hidden in the slit of the paper stack, and it is equipped with a detection means for detecting the undulating state of the regulation guide piece. When storing paper, there is no need to stand up the regulation guide piece, and if you forget to raise the regulation guide piece after placing the paper, the paper loading table will not rise and the regulation guide will be raised and stacked. Since the paper loading table is raised only after the paper is regulated, it is possible to prevent paper stacking from being disrupted, paper feeding errors, jams, and other accidents.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional device, FIG. 2 is an explanatory diagram of a regulation guide, and FIG. 3 is an explanatory diagram showing one embodiment. DESCRIPTION OF SYMBOLS 1...Paper mounting table, 2...Paper feeding means, 3...Regulation guide piece, 10...Device frame (bottom plate), 14...
...Micro switch.

Claims (1)

[Scope of utility model registration request] In a paper feeding device in which sheets are stacked and stored on a paper loading table in an apparatus frame, the paper loading table is raised and fed out one by one by a paper feeding means, the base end is rotated to the paper loading table or the apparatus frame. A regulation guide piece is provided which is freely pivoted, faces up and down along the edge surface of the stacked paper on the paper stacking table, and is positioned by abutting against the side edge of the stacked paper, and the undulation state of the regulation guide piece is controlled. A paper feeding device characterized in that a detecting means for detecting is disposed, and the detecting means prohibits the paper mounting table from rising while detecting the inverted state of the regulation guide piece.