JPH1111712A - Paper sheet feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of overlap feeding of paper sheets so as to heighten reliability in feeding paper sheets. SOLUTION: Two holding auxiliary vacuum chambers 24, 25 for sucking paper sheets 1-4 in the same direction as the sucking direction of a holding vacuum chamber 5 are arranged parallel in a paper sheet feeding direction between suction-feeding belt mechanism 7 and a mounting face S. Out of these two chambers 24, 25, the holding auxiliary vacuum chamber 24 near the suction- feeding belt mechanism can advance/retreat in relation to the paper sheets 1-4 on the mounting face S, and this holding auxiliary vacuum chamber 24 is provided with a transfer belt 26 having a large number of (unillustrated) suction holes and transferring the paper sheets 1-4 to a feeding belt 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding apparatus suitable for use in, for example, a mail automatic processing apparatus.

[0002]

2. Description of the Related Art Heretofore, as a sheet feeding apparatus of this type, for example, the apparatus disclosed in Japanese Patent Application Laid-Open No. 57-126444 has been adopted. This is because, as shown in FIG. 4, the preceding paper sheet 1 out of a number of paper sheets (for example, postal matter) 1 to 4 arranged side by side on the mounting surface S is replaced by the following paper sheets 2 to 4. The holding vacuum chamber 5 for sucking in the separating direction and the paper sheets 1 in a direction perpendicular to the suction direction by the holding vacuum chamber 5
, A suction / feed belt mechanism 7 having a feed belt 6 with a large number of holes, and a holding vacuum chamber disposed between the suction / feed belt mechanism 7 and the mounting surface S. 5 is provided with an auxiliary holding vacuum chamber 8 for sucking the paper sheets 1 to 4 in the same direction as the suction direction by 5. Reference numeral 9 denotes a transport roller around which the feeding belt 6 is wound.

In such a sheet feeding apparatus, the sheet 2 of the following sheet 2 immediately after the feeding of the preceding sheet 1 is started when the sheets 1 to 4 are fed. Feeding (double feeding) by the class 1 or the feeding belt 6 is prevented.

[0004]

By the way, in this kind of paper sheet feeding apparatus, for example, the size and the size of a mail are small.
In order to reliably feed one sheet at a time in a state where paper sheets having different thicknesses, weights or hardnesses are mixed, there are the following problems.

That is, in the conventional sheet feeding apparatus, the sheets 1-4 on the mounting surface S are sucked and held by the single holding auxiliary vacuum chamber 8, and the suction / feed belt mechanism 7 is used. For example, when the preceding paper sheet 2 is suctioned by the auxiliary vacuum chamber 8 for holding the paper sheet 1 or when the paper sheet 1 is fed by the suction / feed belt mechanism 7, the following paper sheet 2 comes into close contact with each other due to friction. I was

As a result, two paper sheets 1 and 2 are fed simultaneously, which causes a problem that the reliability in feeding paper sheets is reduced.

[0007] The present invention has been made in view of such circumstances, and it is possible to reliably prevent simultaneous feeding of paper sheets lined up on the mounting surface, and to thereby improve reliability in feeding paper sheets. It is an object of the present invention to provide a paper sheet feeding device capable of improving the paper feeding.

[0008]

According to a first aspect of the present invention, there is provided a paper sheet feeding apparatus according to the first aspect of the present invention. Suction / feed having a holding vacuum chamber for sucking the leaves in a direction to separate the leaves from the succeeding sheets, and a feeding belt for feeding the sheets in a direction perpendicular to the suction direction of the holding vacuum chamber In a paper sheet feeding device equipped with a belt mechanism, two holding assistants for suctioning paper sheets between the suction / feed belt mechanism and the mounting surface in the same direction as the suction direction of the holding vacuum chamber. Vacuum chambers are arranged in parallel in the sheet feeding direction, and among them, an auxiliary vacuum chamber for holding near the suction / feeding belt mechanism is used for holding and retracting paper sheets on the loading surface. It consists of an auxiliary vacuum chamber, and this suction auxiliary vacuum chamber It is constituted which is disposed to freely drive the transport belt for transporting the paper sheet in a feeding belt.
Therefore, during the feeding of the preceding sheet sucked and held in the holding auxiliary vacuum chamber on the side of the suction / feed belt mechanism, the next sheet is moved to one of the two holding auxiliary vacuum chambers. It is sucked and held in one holding auxiliary vacuum chamber. Also, when the succeeding (next) sheet is suction-held in the holding auxiliary vacuum chamber on the mounting surface side, the preceding sheet is already in the holding auxiliary vacuum chamber on the suction / feed belt mechanism side. The suction and holding state is continued until the suction and holding of the succeeding sheet into the holding auxiliary vacuum chamber on the mounting surface side of the succeeding sheet is completed. Sheets after the eyes are isolated.

According to a second aspect of the present invention, in the paper sheet feeding apparatus according to the first aspect, of the two auxiliary vacuum chambers for holding, the auxiliary vacuum chamber for holding near the mounting surface is provided on the mounting surface. The configuration is made up of a holding auxiliary vacuum chamber that can advance and retreat with respect to paper sheets. Therefore, the auxiliary vacuum chamber for holding on the mounting surface moves with respect to the paper sheets on the mounting surface to suck and hold the paper sheets.

According to a third aspect of the present invention, there is provided the paper sheet feeding apparatus according to the first aspect, wherein the paper sheet on the mounting surface is transported in a direction approaching or separating from the auxiliary vacuum chamber for holding. It is configured to include a device. Therefore, the paper sheet is transported by the transport device in a direction approaching or leaving the auxiliary vacuum chamber for holding.

According to a fourth aspect of the present invention, in the paper sheet feeding apparatus according to the first aspect, the transport device comprises a transport device having a spiral roller. Therefore, the paper sheet is conveyed by the spiral roller of the conveying device in a direction approaching / separating from the auxiliary holding vacuum chamber.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a front view showing a paper sheet feeding apparatus according to a first embodiment of the present invention, and FIG. 2 shows an auxiliary vacuum chamber for holding the paper sheet feeding apparatus according to the first embodiment of the present invention. FIG.
The same reference numerals are used for the feeding belt mechanism (including the transport roller), the mail, and the mounting surface. In the figure, a sheet feeding device indicated by reference numeral 21 is a suction / feed belt mechanism 7.
And a holding auxiliary vacuum chamber 22 and a transfer device 23.

The holding auxiliary vacuum chamber 22 is composed of two holding auxiliary vacuum chambers 24 and 25 for sucking the sheets 1 to 4 in the same direction as the suction direction by the holding vacuum chamber (main vacuum chamber) 5. , Suction / feed belt mechanism 7
And the placing surface S are arranged in parallel in the sheet feeding direction.

The auxiliary holding vacuum chamber (second holding vacuum chamber) 24 includes paper sheets 1-4 on the mounting surface S.
And an auxiliary vacuum chamber for holding which can move forward and backward in the direction of arrow a, and is disposed near the suction / feed belt mechanism 7. The holding auxiliary vacuum chamber 24 has a large number of suction holes (not shown), and a transfer belt 26 for transferring the paper sheets 1 to 4 to the feeding belt 6 is arranged to be drivable in the direction of arrow b. ing.

On the other hand, the holding auxiliary vacuum chamber (first holding vacuum chamber) 25 is arranged in the same direction as the moving direction of the holding auxiliary vacuum chamber 24 with respect to the sheets 1-4 on the mounting surface S. The movable auxiliary vacuum chamber is provided near the mounting surface S.

The transport device 23 is provided with paper sheets 1 to 1 on the mounting surface S.
4 is provided with a spiral roller 27 for transporting the nozzle 4 in a direction approaching and separating from the auxiliary holding vacuum chamber 22, and a part thereof is arranged near the auxiliary holding vacuum chamber 25 so as to be partially exposed on the mounting surface S. ing.

In the paper sheet feeding apparatus configured as described above, the following operations [A], [B], and [C] are sequentially performed, thereby performing one sheet of paper feeding. I do. By repeatedly performing these operations, a large number of paper sheets lined up on the mounting surface are sequentially fed.

[A] The sheet 1 sucked and held in the auxiliary holding vacuum chamber 24 is fed by the holding vacuum chamber 5 and the feeding belt 6.

[B] First, the tip of the holding auxiliary vacuum chamber 24 is approached to the sheet 2 sucked and held in the holding auxiliary vacuum chamber 25, and the holding auxiliary vacuum chamber 24 is
The paper sheet 2 is sucked. Next, the transfer belt 26
Is driven and the paper sheet 2 is sucked and held.
Is transferred from the auxiliary holding vacuum chamber 25 to the auxiliary holding vacuum chamber 24 side. Thereafter, the auxiliary vacuum chamber for holding 24 is returned to the original position while maintaining the state where the tip of the auxiliary vacuum chamber for holding 24 sucks and holds the paper sheet 2.

[C] By rotating the spiral roller 27 in the forward direction, the paper sheets 3 and 4 are brought closer to the holding auxiliary vacuum chamber 25,
After the leading sheet 3 is sucked and held in the auxiliary holding vacuum chamber 25, the remaining sheet 4 is separated from the sheet 3 by the rotation of the spiral roller 27 in the negative direction.

FIG. 3 shows the operation of the paper sheet feeding apparatus according to the present embodiment in chronological order.
FIG. 3 is a time chart showing the operation of the paper sheet feeding device according to the first embodiment of the present invention. The figure shows that paper sheets 1
Is sucked and held in the auxiliary holding vacuum chamber 24, and the feeding is started just now by the holding vacuum chamber 5 and the feeding belt 6.

From the initial state in which the paper sheet 1 is not yet held in any of the holding auxiliary vacuum chambers 24, 25,
In the operation until the sheet 1 is sucked and held in the holding auxiliary vacuum chamber 24 and the feeding is about to be started, it is assumed that there is no preceding sheet.

Here, the feeding belt 6 may be stopped until the sheet 1 is sucked and held in the auxiliary holding vacuum chamber 24 and the feeding is started.

The means for transferring the sheets held by the holding auxiliary vacuum chamber 25 to the holding auxiliary vacuum chamber 24 may be the following means in addition to the first embodiment. Good. That is, after the holding auxiliary vacuum chamber 25 moves to the same surface position as the holding auxiliary vacuum chamber 24 while sucking and holding the sheets, the transfer belt 26 is driven to move the sheets to the holding auxiliary vacuum chamber. Transfer to 24.

As means for separating the remaining paper sheets from the paper sheets after the leading paper sheets are approached to the auxiliary vacuum chamber 25 for holding and sucked and held, a conveyor belt (not shown) is used. , Or a mounting table (not shown) is moved forward and backward.

In addition, in order to reduce the time required for feeding per sheet, the following points are taken into consideration. First, the operation of FIG. 3B will be described. The timing at which the holding auxiliary vacuum chamber 24 starts to move in the return direction does not necessarily need to be after the time of “paper sheet feeding completed” in the operation [A], but is performed for the paper sheet being fed. By controlling as much as possible according to the thickness of the paper sheet being fed so as not to touch it and the size of the paper sheet sucked and held by the holding auxiliary vacuum chamber 24, etc. Can be shortened.

Next, the operation [C] in FIG. The timing at which the paper sheets start moving toward the holding auxiliary vacuum chamber 25 does not necessarily need to be after the movement (return) of the holding auxiliary vacuum chamber 24 is completed.
The auxiliary auxiliary vacuum chamber 2 is transferred to the auxiliary auxiliary vacuum chamber 24 so as not to touch the sheets held by suction.
By controlling the timing of the start of the movement to be advanced in accordance with the thickness of the sheet to be sucked and held in 4, the movement speed of the auxiliary vacuum chamber 24 for holding, etc., the feeding time per sheet is shortened. can do.

Further, in the operation [C], the first sheet is suction-held in the holding auxiliary vacuum chamber 25, and the remaining sheet is suction-held in the holding auxiliary vacuum chamber 25. The timing of separation from the class can be started immediately after the leading sheet is sucked and held in the auxiliary holding vacuum chamber 25.

In consideration of this, by controlling so that the timing to start separating the remaining sheets is advanced, the feeding time per sheet can be shortened.

[0030]

As described above, according to the present invention, during the feeding of the preceding sheet sucked and held in the holding auxiliary vacuum chamber on the side of the suction / feeding belt mechanism, the next sheet is fed. The sheet is sucked and held in one of the holding auxiliary vacuum chambers. Also, when the succeeding sheet is suction-held in the holding auxiliary vacuum chamber on the mounting surface side, the preceding sheet is already suction-held in the holding auxiliary vacuum chamber on the suction / feed belt mechanism side. This suction holding state is continued until the suction holding of the succeeding sheet in the auxiliary vacuum chamber for holding on the mounting surface side of the succeeding sheet is completed, and the third and subsequent sheets are moved by the sheet from the preceding sheet. Paper sheets are isolated.

Therefore, it is possible to prevent the occurrence of double feeding of the succeeding sheets caused by the preceding sheets and the feeding belt during feeding, thereby improving the reliability in feeding the sheets. it can.

[Brief description of the drawings]

FIG. 1 is a front view showing a paper sheet feeding device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a holding auxiliary vacuum chamber of the paper sheet feeding device according to the first embodiment of the present invention.

FIG. 3 is a time chart illustrating an operation of the paper sheet feeding device according to the first embodiment of the present invention.

FIG. 4 is a front view showing a conventional paper sheet feeding device.

[Explanation of symbols]

 1-4 Paper sheets 5 Holding vacuum chamber 6 Feed belt 7 Suction / feed belt mechanism 21 Sheet feeding device 22, 24, 25 Auxiliary vacuum chamber for holding 26 Transfer belt 27 Transfer device S Mounting surface

Claims (4)

[Claims] 1. A holding vacuum chamber for sucking in a direction in which a preceding sheet is separated from a succeeding sheet among a large number of sheets arranged side by side on a mounting surface, and suction by the holding vacuum chamber. A sheet feeding device provided with a suction / feeding belt mechanism having a feeding belt for feeding the sheets in a direction perpendicular to the direction, wherein the suction / feeding belt mechanism is disposed between the suction / feeding belt mechanism and the mounting surface. Two holding auxiliary vacuum chambers for sucking sheets in the same direction as the suction direction by the holding vacuum chamber are arranged in parallel in the sheet feeding direction, and the suction / feed belt The auxiliary holding vacuum chamber in the vicinity of the mechanism comprises an auxiliary holding vacuum chamber capable of moving back and forth with respect to the sheet on the placing surface, and the auxiliary vacuum chamber for holding has a large number of suction holes and has The transport belt that transports paper sheets to the belt can be driven freely A paper sheet feeding device, wherein the paper sheet feeding device is disposed in a paper feeding device. 2. The holding auxiliary vacuum chamber in the vicinity of the mounting surface of the two holding auxiliary vacuum chambers comprises a holding auxiliary vacuum chamber capable of moving back and forth with respect to a sheet on the mounting surface. The paper sheet feeding device according to claim 1, wherein: 3. The apparatus according to claim 1, further comprising a transport device for transporting the paper sheets on the placement surface in a direction approaching / separating from the holding auxiliary vacuum chamber. Paper feeder. 4. The paper sheet feeding device according to claim 3, wherein said conveying device comprises a conveying device having a spiral roller.