JPS63267633A - Paper sheet feeding device - Google Patents

Abstract

PURPOSE:To carry paper sheets constantly with a regularized space even in the case when many different kinds of paper sheets are mingled by controlling the operation of a speed changeable motor by an instruction from a space control portion. CONSTITUTION:A first space measure portion 6 measures the space between the end of a paper sheet first delivered 1 to a carrier portion and the front end of the paper sheet delivered next 2. The information thus obtained by the first space measure portion 6 is sent to a space control portion 8. The space control portion 8 gives instruction to a motor control portion 9 to accelerate or decelerate a speed changeable motor 5 so as to maintain the space to a fixed value. A second space measure portion 7 measures the space between the paper sheets 1 and 2 again and delivers such information to a leveling off portion 10. After repeating this action, the leveling off portion 10 calculates the leveling off value of the space so far taken and delivers the leveling off value to a space compensation portion 11. The result of a comparison made between this leveling off value and a fixed space value preliminary established is delivered to the space control portion 8. The space control portion 8 controls the speed changeable motor 5 by accelerating or decelerating the speed to constantly keep the space to a regularized value.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a supply of paper sheets for continuously sending out a plurality of paper sheets of different sizes, thicknesses, and weights, such as mail items, one by one. Regarding equipment.

[Conventional technology]

A conventional paper sheet feeding device for continuously feeding out a large number of paper sheets of different sizes, thicknesses, and weights one by one, such as mail, has a configuration as shown in Fig. 3. There is. That is, it has a vacuum chamber 12, a suction belt 13 disposed close to the vacuum chamber 12 and provided with equally spaced suction holes, and a variable speed motor 14 that drives the movement of the suction belt 13. When the vacuum chamber 12 and the suction holes of the suction belt 13 match, the paper sheets 16 that are piled up and under negative pressure toward the suction belt 13 are sucked and sent out one by one. It is. The distance between the end of the foremost paper sheet sent out and the leading edge of the next paper sheet sent out is measured by a distance measuring section 15, and information from this distance measuring section 15 is sent to the variable speed motor 14.

The variable speed motor 14 is controlled by this information to accelerate or decelerate so as to keep the interval between the two sheets constant.

[Problem that the invention seeks to solve]

The conventional paper sheet feeding device as described above has a suction belt 1.
Since the variable speed motor 14 driving the variable speed motor 14 is controlled at constant intervals using one interval measuring unit 15, when there is only one type of paper sheet, the acceleration/deceleration instruction value of the variable speed motor 14 is controlled. However, when there are many types of paper sheets with different sizes, thicknesses, and weights, it is not possible to control the spacing at a constant level, and the spacing cannot be controlled properly. The disadvantage is that the supply capacity decreases as the amount increases.

The purpose of the present invention is to eliminate the drawbacks of the conventional paper sheet feeding device as described above, and to constantly feed paper sheets at regular intervals even when many types of paper sheets with different sizes, thicknesses, and weights are mixed. To provide a paper sheet feeding device with excellent feeding ability.

[Means for solving problems]

The paper sheet feeding device of the present invention has a vacuum chamber and a suction hole for sucking the foremost sheet of stacked paper sheets, is arranged close to the vacuum chamber, and has a variable speed motor. a supply section having a suction belt driven by a suction belt to move in a predetermined direction; a second distance measuring section disposed in front of the first distance measuring section and measuring the distance between two consecutively conveyed sheets; an averaging section that inputs information from the interval measuring section and calculates the average value of a plurality of intervals; and an averaging section that inputs the calculation result of the averaging section, compares it with a preset value, and outputs the result. an interval correction section that inputs the information from the first interval measurement section and the information from the interval correction section and outputs a command for accelerating or decelerating the variable speed motor; and the ffn interval control section. and a motor control section that controls the operation of the variable speed motor according to commands from the variable speed motor.

〔Example〕

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

FIG. 1 is a block diagram showing the main structure of an embodiment of the present invention, and FIG. 2 is a plan view showing a supply section and first and second distance measuring sections of the embodiment of FIG.

As shown in FIG. 2, the supply section of the paper sheet supply apparatus of this embodiment includes a vacuum chamber 3 and a suction belt 4 driven by a variable speed motor 5. The paper sheets placed on this supply section are initially attracted by the suction belt 4 which rotates at a constant speed, and the first one is sent out. A first distance measuring section 6 disposed in front of the suction belt 4 measures the distance between the end of the paper sheet 1 that is first sent to the conveyance section and the leading edge of the paper sheet 2 that is sent next. do. The information from the first interval measurement section 6 is transmitted to the interval control section 8.
(See Figure 1). If the interval between two sheets is wider than a predetermined value, the interval control unit 8 gives a command to the motor control unit 9 to accelerate the variable speed motor 5 in order to make the interval a predetermined value. . If the distance between them is narrow, the motor control section 9 is instructed to decelerate the variable speed motor 5 to maintain the distance at a predetermined value.

The paper sheets 1 and 2 are successively conveyed and reach a distance measuring section 7 disposed at a predetermined position in front of the first distance measuring section 6 . The second spacing measurement section 7 measures the spacing between these sheets again and sends the information to the averaging section 10.

When several sheets of paper pass through the second spacing measurement section 7 by repeating the above operations, the averaging section 10 calculates the average value of the spacing up to that point, and uses the average value obtained as a result of the calculation as the interval. It is sent to the correction section 11. The interval correction unit 11 compares the average interval value from the averaging unit 10 with a predetermined interval value set in advance, and sends information on the comparison result to the interval control unit 8. Since the information from the interval correction unit 11 indicates that the average value of the intervals is large, the interval control unit 8 must correct the interval information from the first interval measurement unit 6 and accelerate the variable speed motor 5. If not, increase its speed.

Further, if the average value of the intervals is small and the interval information from the first interval measuring section 6 needs to be corrected to reduce the speed of the variable speed motor 5, the speed is decreased. In this way, the interval between sheets is controlled to always be a constant value.

〔Effect of the invention〕

As explained above, the paper sheet feeding device of the present invention can maintain a constant spacing with high precision even when many types of paper sheets with different sizes, thicknesses, and weights are mixed. It has the advantage of being able to supply more energy, and therefore has the advantage of being able to improve its supply capacity than conventional ones.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main configuration of an embodiment of the present invention, FIG. 2 is a plan view showing the supply section and first and second distance measuring sections of the embodiment of FIG. 1, and FIG. FIG. 2 is a plan view showing the configuration of the main parts of a conventional paper sheet feeding device. 1... Paper sheets sent out first, 2... Paper sheets sent out next, 3... Vacuum chamber, 4... Suction belt with equally spaced holes, 5... Speed variable motor, 6
... first interval measuring section, 7... second interval measuring section, 8.
... Spacing control section, 9... Motor control section, 10... Averaging section, 11... Spacing correction section, 12... Vacuum chamber, 13... Suction belt with holes at equal intervals, 14...
・Variable speed motor, 15... Interval measuring section, 16...
Paper leaves. , / Name 2 Ward 73

Claims (1)

[Claims] A suction belt that has a vacuum chamber and suction holes for suctioning the foremost sheet of the loaded paper sheets, is disposed close to the vacuum chamber, and is driven by a variable speed motor to move in a predetermined direction. a first spacing measuring section that is arranged in front of the adsorption belt in the movement direction and measures the spacing between two sheets that have been continuously conveyed; and the first spacing. A second distance measuring section is disposed in front of the measuring section and measures the distance between two consecutively conveyed paper sheets, and information from the second distance measuring section is inputted and a plurality of an averaging unit that calculates an average value of the intervals of the first interval, an interval correction unit that inputs the calculation result of the averaging unit, compares it with a preset value, and outputs the result; an interval control section that inputs information from the measurement section and information from the interval correction section and outputs a command for accelerating or decelerating the variable speed motor; A paper sheet feeding device comprising: a motor control section for controlling the paper sheet.