JPS6038291B2 - paper feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device that feeds sheets of paper in a Z-shaped folded state to an unfolded and stretched state in a printer or the like.

As printer speeds increase, it becomes more difficult to feed Z-folded continuous sheets to the printer. Most of this problem is due to the fact that when Z-folded sheets are removed from a storage box, the pages of the sheets tend to stick together and cannot be separated from each other. Causes of adhesion include static charge, paper clips catching on each other due to paper perforation and perforation work, and curling of the green parts. If pages that are stuck together are not separated before the paper enters the paper transport machine, and multiple page feeding is performed in which the pages are fed overlapping, paper jams, breakage, or blank pages that are not printed may occur. Traditionally, by creating a frictional drag on the paper such as a bar or brush placed across the paper path,
Attempts have been made to eliminate multiple page feeds, but there are disadvantages in that the frictional force of paper feeding by the bar becomes too large, resulting in damage to the paper and the paper transport machine not being able to operate properly. there were.

In addition, there are some methods that use a fixed sheet guide plate and a movable bar to separate pages that have been fed multiple times, but this still increases the frictional force of paper feeding. It had the disadvantage that it did not function well because it was overcooked. SUMMARY OF THE INVENTION An object of the present invention is to provide a simple, inexpensive, and easy-to-operate paper feeding device that eliminates the above-mentioned disadvantages of multiple page feeding when feeding paper to a printer or the like. According to the present invention, a hopper for folding and stacking continuous sheets; first and second support members having fixed upper ends and having different lengths and flexibility; first and second separating members that are elongated in the width direction of the paper and are respectively attached to the lower ends of the first and second support sections and have different heights; There is obtained a paper feeding device characterized in that it includes a paper traveling machine that causes the paper to travel in a direction in which the paper passes between the members and is then taken out from the hopper.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows one embodiment of the present invention, and FIG. 2 is a view taken along arrow AA shown in FIG.

Continuous sheets 2 are folded in a Z-shape and stacked on a hopper 1. Both ends of a rod-shaped separating member 4 facing in the width direction of the paper 2 are attached to the lower ends of a pair of flexible chains 3 (the upper ends of which are fixed to a frame not shown). Furthermore, a bar-shaped separating section 4' facing in the width direction of the paper 2 is attached to the lower end of a pair of chains (the upper end of which is fixed to the frame) 3' that is shorter than the chain 3. It is located higher than Village 4. The paper 2 is lifted up from the hopper 1, passes between the separating members 4 and 4', passes through the gate paper feed guide plate 5, is run by the next passing paper transport machine 6, and then passes through the fuser roller 7 and onto the stacker 8. can be piled up.

There are two types of double page feeding, in which the pages of the paper 2 are pulled up from the hopper 1 in a state in which they are in close contact with each other: a left-lifting shown in FIG. 3a and a right-lifting shown in FIG. 3b.

In the case of lifting to the left, the double page-feeding page is separated by the separating member 4'. Similarly, in the case of lifting to the right, the double page-feeding page is separated by the separating member 4. The separating members 4, 4' have an appropriate weight, and can be combed between the double-paged pages by contacting the paper 2 with an appropriate pressing force.

Also, due to the different lengths of the support members 3, 3', the separation sections 4, 4' assist in the function of separating mutual double page feeds. This is because the separation members 4 and 4' each have different frequencies of pendulum motion and act to press the paper 2 against the other side. If the supporting members 3 and 3' have the same length, the periods of pendulum movement of the separating members 4 and 4' will also be the same, and the paper 2
When the separation members 4 and 4' are both separated from the sheet 2 at the same time, double page feeding may occur. Further, the separation members 4, 4' move to some extent following the movement of the paper 2, so that the frictional force caused by the running of the paper 2 does not become too large.

Also, when setting paper 2 for the first time, separating members 4, 4'
Since the heights of the paper 2 are different, the starting end of the paper 2 is separated by the separating members 4 and 4.
’ can be passed between the two, making it easy to operate.

As described above, the present invention has the effect of preventing double page feeding of paper, and preventing jamming and damage of paper.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an AA blind view shown in FIG. FIG. 1...hopper, 2...paper, 3,3'
...Supporting member, 4, 4'...Separation member, 5
...Paper feeding guide plate, 6...Paper traveling machine, 7...Fuser roller, 8...Statistic force. Figure 2 Figure 3 Figure 1

Claims (1)

[Claims] 1 Hoppa, which folds and stacks continuous sheets of paper,
A first flexible member having different lengths and having a fixed upper end;
and a second supporting member, located above the hopper and elongated in the width direction of the paper, each supporting the first and second supporting members.
first and second separating members attached to the lower end of the supporting member and having different heights;
a paper feeding device that causes the paper to travel in a direction in which the paper passes between the separating members and is then taken out from the hopper.