JPS595007Y2 - Double separation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double separation mechanism for separating multiple mail items in a mail machine.

Conventionally, there has been a device as shown in FIG. 1 as a double separation mechanism.

In FIG. 1, mail is conveyed from direction A through a conveyance path 3 constituted by conveyor belts 1 and 2.

The mail sent from the conveyance path 3 is suctioned on one side by a suction device consisting of a vacuum chamber 4 and a perforated belt 5 that slides on the front surface of the vacuum chamber, and its conveyance direction is bent and transferred to the conveyor belt 6.7. It is fed into a conveyance path 8 which has a direction different from that of the conveyance path 3 and is sent in direction B.

At this time, if two or more pieces of mail are sent overlapping each other, the adsorption effect does not work on the mail pieces on the outside of the belt 5, so the mail pieces go straight and are sent in the conveying direction C, which is almost the same as the conveying direction A. Therefore, these items are removed or re-supplied as heavy mail via the conveyance path 11 consisting of conveyor bells) 9 and 10.

Here, the suction holes provided in the portion of the vacuum chamber 4 corresponding to the belt 5 have conventionally had a round shape as shown in the drawings, and the holes provided in the belt have also had a round shape.

Therefore, as the relative position between the vacuum chamber 4 and the belt 5 changes, the opening area created by the holes 12 in the vacuum chamber 4 and the holes in the belt 5 changes, and the air suction flow rate changes, causing noise during operation. was occurring.

FIG. 2 shows an example of the opening area created by a circular hole in a belt and a circular hole in a vacuum chamber (FIG. 2A), and a diagram showing the change at this time (FIG. 2B).

Figure 3a shows the case where the round holes on the vacuum chamber side are shifted by half a pitch between the upper row and the lower row to reduce the change in the overall opening area. FIG. 3 is a diagram showing changes in opening area.

In the case of Fig. 3, the change in opening area was reduced, but even this could not prevent noise.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a noiseless dual separation mechanism that eliminates the drawbacks of the prior art.

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

FIG. 4a is a diagram showing a vacuum chamber and a conveyor belt in a double separation mechanism according to the present invention, and FIG. 4a is a diagram showing changes in the opening area in FIG. 4a.

In the present invention, as shown in FIG. 4a, a square hole with a straight edge perpendicular to the belt running direction is bored in the front plate of the vacuum chamber.

A row of round holes is provided on the belt side at a height corresponding to the square holes.

At this time, the length of the square hole in the running direction is set to an integral multiple of the round hole pitch.

With such a structure, the change in opening area is constant as shown in FIG. 4.

FIG. 5 is a diagram showing an embodiment of the present invention employing the structure shown in FIG. 4.

Here, unlike the one in FIG. 1, the hole opened in the front plate of the vacuum chamber 4' is a square hole 12'.

The rest is the same as in FIG. In the case of the present invention, Fig. 4,
As shown in FIG. 5, the open area in the large format is always the area of an integral number of belt side holes, and therefore the open area is constant.

In addition, from the viewpoint of strength and ease of manufacture, this example has a square hole shape as shown in Figure 4, but the hole on the vacuum chamber side has both straight edges as in this example. Any shape is acceptable as long as the edges at both ends have the same shape, that is, the length of the holes in the belt running direction is the same everywhere and is an integral multiple of the pitch of the belt side large size or large group row. Also, the holes on the belt side are not circular as shown in Figure 4.5, but can be of any uniform shape with the same pitch, or in large groups of any shape as shown in Figure 6 (in this case 3), and a large group of the same pitch may be used as a unit.

As explained above, if the present invention is implemented in a single-pass separation mechanism using a vacuum box and a perforated belt, the opening area will be constant, so noise caused by air vibration due to changes in the air suction flow rate will be reduced. It has the effect of reducing the amount of waste generated, and is useful for improving the working environment.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional one-way separation mechanism, Figure 2 a is a diagram showing a conventional round hole, and Figure 2 is an opening created by the misalignment of the belt and the opening in the vacuum chamber in Figure 2 a. A diagram of changes in area; Figure 3a shows the case where the round holes are continuous;
Figure 3 shows the aperture area change diagram for the case of Figure 3 a, Figure 4 a
is an explanation of the hole according to the present invention, the fourth diagram is a diagram of the opening area change in FIG. 4a, and FIG. 5 is a diagram showing an embodiment of the present invention,
FIG. 6 is a diagram showing another embodiment of the belt hole.

Claims (1)

[Scope of utility model registration request] A first conveyance path constituted by opposing belts:
A perforated front plate that is provided at the end of the first conveyance path and guides the paper sheets conveyed by the first conveyance path in a direction different from the first conveyance path direction; and an opening that moves on the front plate. a conveyance means consisting of a perforated belt; a second conveyance path provided at the end of the conveyance means to convey the paper sheets conveyed by the conveyance means; A double separation mechanism comprising a third conveyance path provided at the rear of the means, characterized in that the length of the apertures in the apertured front plate in the belt movement direction is an integral multiple of the aperture pitch of the belt. Dual separation mechanism.