JP2806915B2 - Paper sheet stacking mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet stacking mechanism, and more particularly, to a mail sheet stacking mechanism.

[0002]

2. Description of the Related Art In a conventional mail stacking mechanism, for example, a Japanese Utility Model Laid-Open No. 61-113765 (a receiving plate of a mail stacking apparatus) will be described with reference to FIGS. . FIG. 4 is a cross-sectional view of the receiving plate, FIG. 5 shows a stacking mechanism using the receiving plate, and FIG.

In the conventional stacking mechanism, as shown in FIG. 4, a receiving plate in which an inclined plate 13 for supporting stacked mails 12 is angled upward with respect to a vertical plate 11 for aligning the end faces of the stacked mails. 17 are arranged.

[0005] In FIG.
The angle of input of the postal matter 14 to be accumulated next is reduced by inclining the receiving plate 17. Here, as shown in FIG. 6, the leading angle 15 of the postal matter to be accumulated next is reduced by reducing the input angle so that the postal matter 1 is already accumulated.
It is taken into account that it does not catch on the step 16 of the second window.

[0005]

In the above-mentioned conventional stacking mechanism, the tip of the next incoming mail is caught on the step of the window with the uppermost window by tilting the receiving plate. However, this method has the following problems. (1) If the next incoming mail is thin like a postcard and its tip is not rounded like a sealed letter, it will be caught on the step of the window even if the throwing angle is reduced. (2) The incoming angle of the incoming mail is not always constant and varies depending on the type of mail. For example, the mail has a low rigidity and the tip is drooped when the mail is thrown at the tip. As a result, the throw angle becomes large.

In addition to the above, there is also a method of stacking with the back side without a window or label facing upward, but in the case of a sealed letter, there is always a flap on the back side. This method is not usually used because there is a risk of jamming on the flaps of the already collected mailpieces and causing jams.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper sheet stacking mechanism for preventing the occurrence of jams even if the mail to be collected is a window-sealed letter or a label-sealed letter.

[0008]

According to a first aspect of the present invention, there is provided a paper sheet stacking mechanism, comprising: a conveying belt for conveying the sheets, an accumulation roller for skewing the conveyed sheets, and a skewed sheet. A stop plate for stopping the sheets, an inclined stacking plate for stacking the sheets stopped by the stop plate, a stopper for holding the sheets of the stacking plate, and a stacking unit for storing the sheets. Have been.

Further, the paper sheet stacking mechanism of the second invention comprises:
In the first aspect of the invention, both ends of the collecting roller are provided with rubber rings having different friction coefficients from each other.

Further, the paper sheet stacking mechanism of the third invention is constructed by skewing the paper sheets obliquely by rubber rings having different friction coefficients in the second invention.

Further, in the paper sheet stacking mechanism according to a fourth aspect of the present invention, in the first, second or third aspect, the stacking plate is arranged at an angle which keeps the sheet skewed. It consists of.

Further, in the paper sheet stacking mechanism according to a fifth aspect of the present invention, the subsequent sheet transported in the first, second, third or fourth aspect is characterized in that the paper sheets skewed obliquely on the stacking plate. Because of the steps and angles of the leaves, jamming during stacking is prevented.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of an embodiment of the present invention. FIG. 2 is a side view of FIG. FIG. 3 is a view showing the behavior of the tip of a mail with respect to a sealed letter with a window.

In this embodiment, as shown in FIG. 1, a transport belt 1a or a transport belt 1b for transporting a mail 7b is provided.
Roller 2 for skewing the conveyed mail 7b
A stop plate for stopping the skewed mail 7b, an inclined stacking plate 3 for stacking the mail 7b stopped by the stop plate 4 on the mail 7a, and a stopper 3a for holding the mail 7a of the stacking plate 3. ,
And a stacking unit 5 for stacking a plurality of mail items 7a.

The operation of this embodiment will be described with reference to FIGS. The postal matter 7b conveyed in the upright position by the conveyor belts 1a and 1b is drawn into the stacking unit 5 by the stacking roller 2 which has rubber rings 6a and 6b having different friction coefficients and constantly rotates.

Here, if the friction coefficients of the rubber rings 6a and 6b are set to μa and μb, respectively, it is set so that μa <μb. The stacking plate 3 is arranged at an angle of θ with respect to the transport reference plane 8, and the stop plate 4 is arranged at right angles to the stacking plate 3.

When the mail 7b is pulled in by the collecting roller 2, the rubber ring 6a having a lower friction coefficient
The slip with the postal matter 7a is greater than that of the postal matter 7a, so that the skew is made obliquely, and the side in contact with the rubber ring 6b is drawn in earlier, and is accumulated along the accumulation plate 3 and the stop plate 4.

In FIG. 3, when the next postal matter 7b to be accumulated is drawn in by the accumulation roller 2, the leading end 9 of the postal matter and the step 10 of the window of the postal matter 7a already accumulated are inclined as shown in the figure. Since the post 9 passes through the post 7 in a state where the post 7 is cut, the tip 9 of the post 7 does not catch on the step 10 of the window of the post 7a, thereby preventing the occurrence of a jam.

Although the description has been made of the mail conveyed in the upright position, the present invention is also applicable to a mechanism for stacking mail conveyed in a horizontal state downward.

[0021]

As described above, the paper sheet stacking mechanism according to the present invention, by stacking the mail at an angle with respect to the transport reference plane, makes it possible to form the step on the surface of the letter seal formed by the window or label of the mail. Then, since the tips of the postal matter to be accumulated next are not parallel to each other, there is an effect that the risk of jamming due to the tip being caught on a step and causing a jam can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing the embodiment of the present invention.

FIG. 3 is a diagram showing the behavior of a mail item that is later conveyed to a sealed envelope with a window in the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a receiving plate of a conventional stacking mechanism.

FIG. 5 is a configuration diagram using a receiving plate in a conventional stacking mechanism.

FIG. 6 is a view showing the behavior of a mail item subsequently conveyed to a window-sealed letter piled up on a receiving plate in a conventional stacking mechanism.

[Explanation of symbols]

 1a, 1b Conveying belt 2 Stacking roller 3 Stacking plate 3a Stopper 4 Stop plate 5 Stacking section 6a, 6b Rubber ring 7a, 7b Mail 8 Transport reference plane 9 Tip of mail 10 Window step 11 Vertical plate 12 Stacked mail Object 13 Inclined plate 14 Mail to be accumulated next 15 Tip of mail 16 Step of window 17 Receiving plate

Continuation of front page (72) Inventor Ryo Koizumi 5-7-1 Shiba, Minato-ku, Tokyo Within NEC Corporation (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 31/36

Claims (5)

(57) [Claims] 1. A paper sheet stacking mechanism for preventing the occurrence of jam when stacking due to a step formed by a window with a window or a label, comprising: a conveying belt for conveying the sheets; and a conveyed sheet. Roller, a stop plate for stopping skewed sheets, an inclined stacking plate for stacking sheets stopped at the stop plate, a stopper for holding sheets of the stacking plate, and a sheet A paper sheet stacking mechanism, comprising: a stacking unit for storing paper sheets. 2. The paper sheet stacking mechanism according to claim 1, wherein rubber rollers having different friction coefficients are provided at both ends of the stacking roller. 3. The paper sheet stacking mechanism according to claim 2, wherein the paper sheets are obliquely skewed by rubber rings having different friction coefficients. 4. The paper sheet stacking mechanism according to claim 1, wherein the stacking plate is arranged at an angle that keeps the paper sheets skewed. 5. The following sheet conveyed has a step and an angle of the sheet skewed obliquely on the stacking plate, thereby preventing a jam when the sheet is stacked. The paper sheet stacking mechanism according to claim 1, 2, 3, or 4, wherein