JPH0530029Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an apparatus for conveying paper using a paddle wheel that rotationally drives an elastic paddle.

[Conventional technology]

A paper conveyance device for conveying originals or copy paper in a copying machine or the like is, for example, a paddle wheel 2 that rotationally drives an elastic paddle 1, as shown in FIG.
It is known that the paper 3 is conveyed by the following.

That is, as shown in FIG. 5, a paddle wheel 2 is disposed above the paper receiving part 4, and a retard pad 6 is provided in front of the feed roll 5, so that the top paper 3a of the paper 3 in the paper receiving part 4 is sent out. It is configured to send out up to roll 5.

[Problem that the invention attempts to solve]

With such a paper conveyance device, the elastic paddle 1 and the paper 3 are pressed against each other to feed the paper, and the return pad 6
Since the uppermost paper 3a and the lower papers 3b are separated and only the uppermost paper 3a is sent out, the elastic paddle
It is necessary to set the length to reach the paper receiving section 4 so that even one sheet of paper on the paper receiving section 4 can be sent out.

For this reason, the elastic paddle 1 is pressed against the paper 3 on the side opposite to the feeding side from the rotation center 1a, and the initial conveying force when the elastic paddle 1 is pressed against the paper 3 becomes particularly large.

For example, in FIG. 5, the elastic paddle 1 is pressed against the paper 3 at point A to start transporting the paper, and at point B, where it contacts the retard pad 6, the paper is separated, preventing double feeding and additional feeding, and only transporting the topmost paper 3a. Send it out.

Therefore, paper 3 is the distance from point A to point B.
Since the second and subsequent sheets of paper 3b are conveyed by the elastic paddle 1 over the distance XAB along with the uppermost sheet 3a, the sheets are not separated by the retard pad 6 and double feeding is likely to occur. Become.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a paper conveyance device using a paddle wheel, which can shorten the distance over which paper is conveyed without being subjected to retard force by an elastic paddle, thereby making double feeding less likely to occur.

[Means and actions for solving problems]

A paddle guard made of an elastic sheet material is provided above the paper receiving portion so as to be pressed against the topmost paper of the paper by an elastic paddle, thereby shortening the distance that the paper is conveyed without being subjected to retard force. It has been made possible.

〔Example〕

As shown in FIG. 1, a lower plate 12 is formed into a substantially dogleg shape with a horizontal plate 10 and an inclined plate 11, and an upper plate 15 is formed into a substantially doglegged shape with a horizontal plate 13 and an inclined plate 14. The horizontal plate 10 of the lower plate 12 serves as a paper receiving portion, and a retard pad 16 is attached to the inclined plate 11, which rotates about a shaft 17 at a position above the upper plate 15. A paddle wheel 19 having an elastic paddle 18 is disposed, and the elastic paddle 18 protrudes from the opening window 20 of the upper plate 15 toward the lower plate 12 and comes into contact with the topmost sheet 21a of the sheets 21.

A paddle guard 22 is provided on the horizontal plate 13 of the upper plate 15.
The base end 22a of the paddle guard 22 is fixed, and the distal end 22b of the paddle guard 22 is made of elastic mylar, nylon sheet, etc. with a thickness of 0.7 mm. When it does not come into contact with the elastic paddle 18, it protrudes slightly below the opening window 20, as shown in FIGS. It's meant to be pushed.

Note that the protruding length L of the paddle guard 22 may be arbitrarily selected depending on the material of the paper to be conveyed.

Because of this, the elastic paddle 18 rotates along the paddle guard 22 and comes into contact with the paper 21 for the first time at a point C away from the paddle guard 22, and the distance at which the paper 21 receives the conveying force is:
For example, if it is XCB in Figure 1 and there is no paddle guard 22, the elastic paddle 1 at point A
The distance at which the paper 21 receives the conveying force when the paper 21 contacts the paper 21 is XAB in FIG.
By providing 2, the distance of XAC is shortened.

Therefore, even if the length of the elastic paddle 18 is in contact with the paper receiving portion, the distance over which the paper 21 receives the conveying force can be shortened, so that double feeding is less likely to occur.

[Effect of idea]

When the elastic paddle 18 is separated from the paddle guard 22, it is pressed against the top paper 21a of the paper 21 and applies a conveyance force, so the distance over which the paper 21 receives the conveyance force from the elastic paddle 18 is shorter than when the paddle guard 22 is not provided. It becomes like this.

Therefore, even if the length of the elastic paddle 18 is in contact with the paper receiving portion, the distance over which the paper 21 receives the conveying force can be shortened, and double feeding is less likely to occur.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention.
The figure is an overall front view, Figure 2 is a front view of the paddle guard installed, Figure 3 is a plan view, Figure 4 is a perspective view,
FIG. 5 is an explanatory diagram of a conventional example. 18 is an elastic paddle, 19 is a paddle wheel, 2
1 is the paper, 21a is the top paper, and 22 is the paddle guard.

Claims (1)

[Scope of utility model registration request] A paddle wheel 19 formed by rotationally driving an elastic paddle 18 is disposed above the paper receiving section, and the elastic paddle 18 is configured to press against and convey the topmost paper 21a of the paper 21 on the paper receiving section. , a paddle guard 22 made of an elastic sheet material is placed above the paper receiving portion, and the elastic paddle 18
1. A paper conveyance device using paddle wheels, characterized in that the paddle wheels are disposed so as to be pressed against the topmost paper 21a of the paper 21.