JP2609678B2 - Sheet handling equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet handling apparatus, and more particularly to aligning temporarily stacked sheets and surely separating and feeding the sheets one by one from the bottom. To a sheet handling device.

[Conventional technology]

The conventional device requires a detection mechanism that detects the amount of axial movement of the sheet and a movement mechanism that moves the left and right guides according to the amount of movement, depending on the amount of movement of the conveyed sheet. The left and right guides are always moved by a moving mechanism, or the left and right guides are always moved in the axial direction at regular intervals. Examples of this type of device include U.S. Pat. No. 4,657,239 and JP-A-62-126047.

[Problems to be Solved by the Invention]

However, the above-described related art requires a detection mechanism for detecting an axial movement amount of the sheet and a moving mechanism for moving the left and right guides. For this reason, there were problems such as cost and noise when moving the guide.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet handling apparatus capable of surely aligning stacked sheets and then sequentially separating and feeding the sheets.

[Means for Solving the Problems]

In order to achieve this object, the present invention includes a fixed guide on one side for use as a reference for the axial position, and a rear end guide serving as a stop position of the sheet when entering, and accumulates a plurality of sheets of sheets. A stacking section and a blowing mechanism having a plurality of air blowing holes for separating the stacked sheets, and stacking the sheets by utilizing an air flow from the blowing mechanism. Is achieved by

[Action]

According to the above-described configuration, the plurality of stacked sheets are pressed against the rear end guide by the conveying force of the entrance mechanism and the airflow from the air blowing holes for separation, and the flow velocity difference between the air blowing holes is further increased. Since the sheets are pressed against the axial fixed guide by, the stacked sheets are aligned along the axial fixed guide and the trailing end guide.

〔Example〕

Hereinafter, the present invention will be described based on embodiments shown in the drawings. 1 to 6 relate to the first embodiment of the present invention, and the sheet reversing device 1 is provided with an entrance section 10, a paper feeding section 20, a stacking section 30, and a discharging section 40.

The entry unit 10 includes a lower pulley 11 and a lower roller 13 provided on a lower pulley shaft 18, an upper pulley 12 and an upper roller 14 provided on an upper pulley shaft 19, and a sheet detector 15. The lower pulley shaft 18 and the upper pulley shaft 19 are supported by the machine frame 3. The lower pulley shaft 18 is supported by the drive motor 5 so as to rotate in the direction of arrow B, and the upper pulley shaft 19 is set to be slightly movable in the vertical direction. The lower pulley 11 is a lower pulley shaft 18
Are provided at predetermined intervals. Lower roller 13
Are provided between the two lower pulleys 11 and 11,
It has a diameter larger than the diameter of the lower pulley 11. Upper pulley 12
Is provided so as to face the lower pulley 11. The upper roller 14 is disposed so as to be intricately integrated with the lower roller 13, and has the same diameter as the upper pulley 12 or a small diameter. Such an intricate arrangement of the lower roller 13 and the upper roller 14 increases the rigidity of the sheet A with the intricate rollers 13 and 14 so that the leading end of the sheet A is deposited on the stacking unit 30. This is because it is possible to immediately convey the lashes. The sheet detector 15 is for detecting the passage of the sheet A through the entrance 10 and is provided with a lower pulley.
It is arranged near the facing surface of the upper pulley 12.

The paper feeding unit 20 includes a vacuum chamber 21, a suction belt 22, and a blowing mechanism 23. The vacuum chamber 21 is mounted on the same plane as a bottom plate 31 of a stacking unit 30 which will be described later, below the machine frame 3. The suction belt 22 is wound around a pair of pulleys 24 and 25 rotatably supported by the bottom frame 6 at both ends of the vacuum chamber 21 so as to surround the outer peripheral surface of the vacuum chamber 21. The pulleys 24, 25 are rotated in the direction of arrow C (paper feed direction) by the drive motor 26.

The blowing mechanism 23 is mounted on the machine frame 3 and includes a blower 50 and a blowing portion 27. The blower 50 has a vacuum chamber 21
A suction pipe 51 for sucking the internal air and a discharge pipe 52 for discharging the sucked air are connected to each other. The balloon 27 is
It is connected to the blower 50 by a discharge pipe 52, and air is blown from a plurality of outlets 28 toward the lowermost portion of the sheets stacked in a stacking unit 30 described later. When sheets are stacked in the unit 30, the stacked sheets are floated from the suction belt 22. At this time, the discharge pipe 52 is attached to the end of the blowing section 27,
The flow velocity of the air from the outlet 28 is set to be higher as it is farther from the mounting position on the discharge pipe 52.

The stacking unit 30 is a fixed bottom guide that is supported by the machine frame 3 and that is notched so as not to interfere with the vacuum chamber 21 and is attached to the bottom plate 31 to limit the axial position when the sheets A are stacked. A rear plate 33 supported by a side plate 32 and a bottom plate 31 to limit the stop position of the leading edge of the sheet A, and further supported by the machine frame 3 via a shaft 34 for preventing the sheet from floating up, by a rear end guide. It has an upper wire 35 which is interlocked with a certain rear plate 33 and is capable of swinging up and down.

The discharge section 40 includes a pair of lower discharge pulley 41 and upper discharge pulley 42.
Are each supported by the machine frame 3 via a discharge lower pulley shaft 48 and a discharge upper pulley shaft 49. Upper discharge pulley shaft 49 enters
Like the lower pulley shaft 18 of the shaft 10, it is supported by the drive motor 5 so as to rotate in the direction of arrow C. Further, the discharge lower pulley shaft 48 is also set so as to be able to slightly move in the vertical direction like the entrance portion 10. A detector 43 for detecting the discharge of the sheet is arranged near the facing portion between the discharge lower pulley 41 and the discharge upper pulley 42.

Next, the operation of the first embodiment of the present invention will be described. First, in the stacking of the sheets, as shown in FIG. 4, the sheet A conveyed in the direction of arrow B from a conveying path (not shown).
Is a pulley of the entrance 10 rotated by the drive motor 5
It is pinched by 11 and 12, and is immediately sent to the collecting section 30 by the conveying force. At that time, the blower 50 is rotated, and the rotation causes air having different flow velocities to be blown out from the plurality of outlets 28 through the discharge pipe 52 of the blower 50. Further, the vacuum chamber 21 has a negative pressure due to the suction force of the blower 50. The fed sheet A is sucked by the suction belt 22 wound around the outer peripheral surface of the vacuum chamber 21. Sheets A'are stacked at a constant cycle from another conveying path (not shown) as shown in FIG. At this time, the detector 15 of the entrance 10
Detects the number of sheets and the conveyance interval. The first stacked sheets A are adsorbed by the suction belt 22, but the sheets A ′ and the like stacked on the subsequent sheets are levitated by the air flow of the outlet 28 and are separated between the sheets. A layer of air is created, and each piece is judged. At this time, the flow velocity of the air flow from the blow-out port 28 differs depending on the pipe resistance, the air flow characteristic, etc., and in the example shown in FIG. 6, the flow velocity is large on the side of the blow-out hole 28 of the blow-out mechanism 23 away from the discharge pipe 52. A 'is floating because it is connected
Subsequent sheets are aligned along the side plate fixed to the rear plate 33 due to the influence of the air flow.

In the above example, the alignment of the sheets A 'is based on the difference in the air flow velocity from the blow-out holes in the blow-out mechanism 23, but may be configured as shown in FIG. 7 instead.

That is, in FIG. 7, blowing mechanisms 23, 23A are provided as sheet orientation correcting devices for aligning the sheets along the side plate 32 and the rear plate 33. These blowing mechanism 23,2
Due to the air flow from the blow holes 28, 28A of 3A, the sheet is
The sheets are orderly stacked at a predetermined position on the stacking unit 30. Next, the separation and feeding of the stacked and aligned sheets will be described with reference to FIGS. 1 to 3 and 5. FIG. When the signal detected by the detector 15 reaches the specified number, the drive motor 26 of the paper feed unit 20 is driven to rotate the suction belt 22 via the pulley 24, and the sucked sheet A is discharged to the discharge unit 40. Feed the paper. The sheet A pinched and conveyed by the discharge pulleys 41 and 42 is detected by the detector 45 of the discharge unit 40. The drive motor 26 is stopped by this detection signal. The same effect can be obtained by intermittently driving the drive motor 26 without using the detector 45 and performing timer counting from the detection signal of the detector 15 of the entrance unit 10. Since the sheet A is conveyed, the aligned sheet A ′ is adsorbed on the adsorption belt 12 of the vacuum chamber 11. By performing this operation at regular intervals,
The 30 sheets are fed to another transport path (not shown) via the discharge section 40.
Be transported to.

FIG. 8 relates to the second embodiment of the present invention, and is different from the first embodiment in that the blowing portion 27 is obliquely arranged. Other configurations and operations are similar to those shown in the first embodiment.

FIG. 9 relates to the third embodiment of the present invention and differs from the first embodiment in that the upper wire 35 is arranged obliquely to the traveling direction. Wire 35
To align the sheets in the axial direction,
Other configurations and operations are the same as those shown in the first embodiment. Needless to say, the same effect can be obtained by using the second and third embodiments together.

In each of the above-described embodiments, a predetermined number of sheets are stacked in the stacking unit 30 and then discharged one by one by the separating and feeding unit. Instead, the paper feed unit 20 moves to the stacking unit.
It goes without saying that the sheets can be separated and discharged one by one from the discharging section 40 while being fed to 30.

〔The invention's effect〕

As described above, according to the present invention, the stacked sheets can be aligned only by the airflow and the fixed guide, so that the cost can be reduced and the noise due to the guide movement can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a main part of a first embodiment of the present invention.
FIG. 4 is a plan view of FIG. 1, FIG. 3 is a front view of FIG. 1, and FIGS. 4 and 6 are views for explaining a stacking state of sheets in a first embodiment of the present invention. FIG. 6 is a side view, FIG. 6 is a plan view, FIG. 5 is a view for explaining a separated sheet feeding state in the first embodiment of the present invention, and FIG. 7 is a second embodiment of the present invention. FIG. 8 is a plan view of the stacked state of the sheets in FIG. 8, FIG. 8 is a plan view of the second embodiment of the present invention, and FIG. 9 is a plan view of the third embodiment of the present invention. 1 ... Sheet reversing device, 10 ... Entry section, 20 ... Paper feeding section,
21: Vacuum chamber, 22: Suction belt, 23: Blow-out mechanism, 30: Stacking unit, 40: Discharge unit.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masataka Kawachi 502 Kandachicho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (72) Inventor Tetsuro Takahashi 2-6-2 Otemachi, Chiyoda-ku, Tokyo Hitachi, Ltd. (56) References Japanese Utility Model Sho 61-151935 (JP, U) Japanese Utility Model Sho 59-30044 (JP, U)

Claims (1)

(57) [Claims] 1. A stacking unit for stacking conveyed sheets by limiting them with side guides and a rear end guide, and a sheet feeding unit for sucking and feeding the lowermost sheet of the stacked sheets. It is provided with a paper means and a blowout mechanism for floating the second and subsequent sheets from the bottom by the air flow from the plurality of blowout holes, and the blowout mechanism is provided from the plurality of blowout holes which are the floating means. A sheet handling apparatus characterized in that the sheet flow is adjusted so as to align the floating sheet along the side guide and the rear end guide by applying a speed difference to the air flow.