JP2011184187A - Sheet member delivery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet member delivery device capable of quickly and reliably separating sheet members of different thicknesses. <P>SOLUTION: This sheet member delivery device includes a stacking part a front wall and a rear wall of which are folded to form a horizontal stacking part and a sloped stacking part for sheet members, first to third feed rollers for drawing the sheet member from the bottom part of the stacking part, a conveyor roller which is rotated at all times and which delivers the sheet member drawn by the first to third feed rollers, a pass sensor for detecting the front and rear ends of the fed sheet member, a controller which cuts off between a motor and the first to third feed rollers when the pass sensor detects the front end of the sheet member, and connects the motor and the first to third feed rollers when the pass sensor detects the rear end of the sheet member, and a double feed prevention plate which is installed so as to be brought into contact with the second feed roller and vertically moved by a spring extended and retracted according to the thickness of the sheet member passing therethrough. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sheet material feeding apparatus, and more particularly to a sheet material feeding apparatus that can pull out sheet materials having different thicknesses such as envelopes from a laminated portion and separate them at high speed.

  An example of a conventional sheet material feeding device is shown in FIG. The sheet material 2 includes envelopes and postcards. In the conventional apparatus, for example, when 500 postcards are set in the stacking section, feeding cannot be performed with the weight of the postcard itself, or the postcard at the bottom of the stacking section is in close contact with the weight, and the double feed factor (reference P1) It was sometimes shown).

  Further, when envelopes having different thicknesses are mixed, the retard gap 26, which is a gap through which the envelope passes, does not have an appropriate interval, and may be double fed without being separated (indicated by reference numeral P2). The retard gap 26 is a gap between the retard roller 27 and the separation roller 28. When the retard gap 26 is increased, it is easy to double feed, and when it is narrowed, the sheet material 1 is easily blocked and jammed. Even if the retard gap 26 is manually adjusted, it is difficult to cope with cases where envelopes having different thicknesses are mixed.

  Further, if one sheet material 2 passes the separation roller 28, the next sheet material 2 is immediately fed to the separation roller 28 by the feeding roller 4. The end and the front end of the next sheet material 2 approached or overlapped, and the sheet material 2 separated one by one could not be pulled out (indicated by reference numeral P3).

  Patent Document 1 discloses a sheet material feeding device that rotates a retard roller in a direction opposite to the feeding direction of the sheet material to prevent double feeding of the sheet material and push back the sheet material to a position before separation. .

JP-A-5-294484

  An object of the present invention is to provide a sheet material feeding device capable of separating sheet materials having different thicknesses at high speed and with certainty.

  In the sheet material feeding device according to the present invention, the front wall and the rear wall are bent to form a laminated portion in which a horizontal laminated portion and an oblique laminated portion of the sheet material are formed, and the first to third materials are drawn out from the bottom of the laminated portion. A feeding roller, a conveying roller that rotates constantly and feeds the sheet material drawn by the first to third feeding rollers, a passage sensor that detects a front end and a rear end of the fed sheet material, and the passage sensor Detects the front end of the sheet material, shuts off the motor and the first to third feeding rollers, and detects the rear end of the sheet material, the motor and the first to third feeding rollers. A control means to be connected and a double feed prevention plate provided so as to be in contact with the second feeding roller and vertically moved by a spring that expands and contracts according to the thickness of the sheet material passing therethrough are provided. That.

  The front wall is inclined forward from the upper end of the second inclined portion, a first inclined portion inclined backward with respect to the transport line, a second inclined portion inclined forward from the upper end of the first inclined portion, and the second inclined portion. And the rear wall includes a first vertical portion that rises vertically from a conveying line, and a fourth inclined portion that is inclined backward from the upper end of the first vertical portion. And

  The double feed prevention plate includes a horizontal plate portion whose bottom surface is in contact with both the second feed roller and the third feed roller, and a slant inclined at an angle of the first inclined portion from the horizontal plate portion to the rear. And a plate portion.

  The control means is configured to block between the motor and the first to third feeding rollers when the passage sensor does not detect the front end of the sheet material for a predetermined time.

  According to the sheet material feeding device of the present invention, (1) since the front wall and the rear wall are bent to form a laminated portion having a horizontal laminated portion and an oblique laminated portion of the sheet material, the sheet material can be laminated obliquely, and the bottom portion Can reduce the weight. Therefore, it is possible to prevent the case where the sheet material cannot be fed due to the weight or the case where the sheet material is double fed. (2) Since the double feed prevention plate which moves up and down by the spring according to the thickness of the sheet material passing through is provided and brought into contact with the second feeding roller, there is no need to set a gap according to the thickness of the sheet material. Further, the sheet material on the upper side of the double-fed sheet material can be blocked by the friction with the double-feed prevention plate due to the force of the spring. Separation performance can be significantly improved compared to the retard roller. (3) Since the passage sensor and the control means are provided and the leading edge of the sheet material is detected, the first to third feeding rollers are disconnected from the motor, so that the next sheet material is pulled out from the laminated portion. Is put on hold. When the passage sensor detects the rear end of the previous sheet material, the motor and the first to third feeding rollers are connected, and the drawing of the next sheet material from the laminated portion is started. In this way, the sheet material can be spaced apart.

  Since the front wall having the first inclined portion to the third inclined portion and the rear wall having the first vertical portion and the fourth inclined portion are provided, the horizontal laminated portion can be easily set by appropriately setting these inclination angles. And a laminated part having an oblique laminated part can be formed.

  A double feed prevention plate having a horizontal plate portion whose bottom surface is in contact with both the second feed roller and the third feed roller and a swash plate portion inclined backward from the horizontal plate portion at an angle of the first inclined portion is provided. Therefore, a large contact area can be ensured between the sheet material and the upper sheet material that is likely to be double fed due to friction can be reliably blocked.

  When the passage sensor does not detect the front end of the sheet material for a predetermined time, the control means cuts off between the motor and the first to third feeding rollers, so even when the sheet material is not in the laminated portion, It is possible to prevent the wear of the double feed prevention plate that comes into contact with the rotation of the second feed roller from progressing.

It is the schematic of the sheet | seat material delivery apparatus by this invention. It is a principal part enlarged view of FIG. It is operation | movement explanatory drawing of the sheet material delivery apparatus by this invention. 1 is an external view of a sheet feeding device according to the present invention. It is a principal part perspective view of the sheet material delivery apparatus by this invention. It is a perspective view of the double feed prevention board by this invention. It is explanatory drawing of the conventional sheet material sending-out apparatus.

  Hereinafter, a sheet material feeding apparatus according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view of a sheet material feeding apparatus according to the present invention. The sheet material delivery apparatus 1 is an apparatus that enables the sheet material 2 to be delivered at a predetermined interval from a stacked portion 3 on which sheet materials 2 having different thicknesses such as envelopes are stacked and stacked. The sheet material feeding device 1 includes a stacking unit 3, a feeding roller 4, a conveying roller 8, a passage sensor 5, a control unit 6, and a multifeed preventing plate 7. The feed roller 4 is arranged in the order of the first feed roller 4a, the second feed roller 4b, and the third feed roller 4c from the laminated unit 3 side toward the front. The sheet material 2 is pulled out by the feeding roller 4 from the bottom of the laminated portion 3 and fed out from the conveying roller 8 to the front outer side. The transport roller 8 is a pair of upper and lower rollers that rotate constantly. The control means 6 can be an electromagnetic clutch that blocks or connects between the motor 18 and the feeding roller 4. A control circuit may be provided so that the motor 18 can be driven (rotated) and stopped regardless of the electromagnetic clutch. Here, it is assumed that the rotation of the feeding roller 4 is not locked even if the control means 6 interrupts the motor 18. At this time, the feeding roller 4 is pulled by the conveying roller 8 so that the sheet material 2 is dragged and rotated.

  The laminated portion 3 includes a front wall 9 provided in front of the sheet material 2 in the traveling direction and a rear wall 10 provided in the rear in the traveling direction. The front wall 9 includes a first inclined portion 12 that is inclined backward with respect to the conveyance line 17 of the sheet material 2, a second inclined portion 13 that is inclined forward from the upper end of the first inclined portion 12, and a second inclined portion 13. And a third inclined portion 14 that is inclined forward from the upper end of the. The rear wall 10 includes a first vertical portion 15 and a fourth inclined portion 16. The first vertical portion 15 rises vertically from the conveyance line 17, and the fourth inclined portion 16 extends rearward from the upper end of the first vertical portion 15. It is inclined. Such a front wall 9 and rear wall 10 can form a horizontal laminated portion 20 and an oblique laminated portion 21 of the sheet material 2. Since the front wall 9 is bent at the second inclined portion 13 and the third inclined portion 14 in the oblique laminated portion 21, as shown by the A block and the B block in FIG. 1, the sheet material 2 of the A block and the B block Even if the inclination is the same, the sheet material 2 of the B block is laminated to be shifted forward.

  The angle θ between the first inclined portion 12 of the front wall 9 and the horizontal conveyance line 17 is 15 to 60 degrees. The angle θ1 formed by the second inclined portion 13 with respect to the vertical line is 0 to 60 degrees. The angle θ2 formed by the third inclined portion 14 and the vertical line is 30 to 80 degrees. θ2 needs to be larger than θ1. An angle θ3 formed by the first vertical portion 15 and the fourth inclined portion 16 of the rear wall 10 is 100 to 160 degrees. The angle of the 4th inclination part 16 acts so that the front end of the sheet material 2 of the bottom part of A block may be extruded to the area | region enclosed with the 1st inclination part 12 and the 1st feed roller 4a. The height of the first vertical portion 15 is 1.2 to 2.0 times the height of the first inclined portion 12.

  As shown in FIG. 1, the sheet material 2 is stacked horizontally along the lower surface of the first inclined portion 12, leaving a slight upper portion of the first inclined portion 12 to form a horizontal laminated portion 20. A sheet in which the rear end of the sheet material 2 is placed on the fourth inclined portion 16 of the rear wall 10 between the horizontally stacked sheet material 2 and the junction of the first inclined portion 12 and the second inclined portion 13. The front end of the material 2 is inserted according to the slope of the first inclined portion 12. Further, on the sheet material 2, the sheet material 2 is laminated with the front end aligned with the slope of the second inclined portion 13, and the upper surface is laminated to the upper end level of the second inclined portion 13. Subsequently, the front end of the sheet material 2 is laminated in accordance with the slope of the third inclined portion 14. Thereby, the slanting laminated part 21 which consists of A block and B block is formed.

  The weight of the sheet material 2 in the oblique laminated portion 21 is shared by the second inclined portion 13, the third inclined portion 14, and the fourth inclined portion 16, and the force indicated by the symbol X shown in FIG. It only takes the weight. Thereby, the sheet material 2 can be easily pulled out. The position indicated by the symbol X is convenient for pulling out the sheet material 2 from the bottom of the laminated portion 3 behind the first feeding roller 4a. That is, while reducing the weight of the laminated sheet material 2, it is possible to finally change the component force of its own weight to the pushing force of the sheet material 2, and to make it smooth.

  FIG. 2 is an enlarged view of a main part of FIG. The double feed prevention plate 7 is provided in contact with the tops of the second feed roller 4b and the third feed roller 4c. The double feed prevention plate 7 is attached to a substantially V-shaped blade 23 at a position above the second feed roller 4b. The blade 23 is connected to the coil spring 19. Therefore, the double feed prevention plate 7 moves up and down according to the thickness of the sheet material 2 that has entered the second feed roller 4b. Further, a leaf spring 22 is provided at a position above the second feeding roller 4b. Therefore, the leaf spring 22 expands and contracts according to the thickness of the sheet material 2 that has entered the third feeding roller 4c, and the double feed prevention plate 7 moves up and down.

  As shown in FIG. 2, the coil spring 19 and the leaf spring 22 can adjust the force for pressing the double feed prevention plate 7 with an adjusting screw. The double feed prevention plate 7 is bent toward the first feed roller 4a so that the angle formed with the transport line 17 is θ (= 15 to 60 degrees). The conveyance roller 8 is installed with a pair of rollers at an interval of 5 mm, and is always rotating. The conveying roller 8 sandwiches the sheet material 2 from the third feeding roller 4c and sends it out to the front outer side.

  FIG. 3 is an operation explanatory view of the sheet material feeding device according to the present invention. (A) shows the drawing start state of the sheet material 2 from the bottom of the laminated portion 3. (B) shows a state in which the front end of the drawn sheet material 2 has crossed the passage sensor 5. (C) shows a state in which the rear end of the drawn sheet material 2 crosses the passage sensor 5. As shown in FIG. 3A, when the sheet material 2 is pulled out, the feeding roller 4 rotates. First, since the first feeding roller 4 a is in contact with the sheet material 2, the sheet material 2 is pushed between the second feeding roller 4 b and the double feed prevention plate 7. Then, the sheet material 2 is pulled out by the first feeding roller 4a and the second feeding roller 4b. When the sheet material 2 further advances, the sheet material 2 is pulled forward by the first feeding roller 4a, the second feeding roller 4b, and the third feeding roller 4c. The sheet material 2 is eventually sandwiched between the conveyance rollers 8.

  In FIG. 3B, the sheet material 2 is pulled out by the first feeding roller 4a, the second feeding roller 4b, the third feeding roller 4c, and the conveying roller 8, and the leading edge of the sheet material 2 crosses the passage sensor 5. Indicates the state. When the passage sensor 5 is turned off by the sheet material 2, the control means 6 is turned off. Thereby, the rotation of the feeding roller 4 is stopped. Subsequently, since the conveying roller 8 pulls the sheet material 2, the feeding roller 4 is dragged and rotated. The operation of the first feeding roller 4a pulling out the next sheet material 2 is put on hold.

  FIG. 3C shows a state in which the sheet material 2 is sent out from the conveying roller 8. The passage sensor 5 detects the rear end of the sheet material 2. When the passage sensor 5 is turned on by the passage of the sheet material 2, the control means 6 is turned on. Thereby, the rotation of the feeding roller 4 is started. The next sheet material 2 at the bottom of the laminated portion 3 is pulled out by the conveying roller 8. As shown in FIG. 3C, the length G between the passage sensor 5 and the second feeding roller 4b was 82 mm. Although not limited to this value, the interval between the sheet materials 2 fed from the conveying roller 8 can be set to a length indicated by G.

  When the sheet material 2 is sent out, the rotation of the feeding roller 4 is started. However, when the sheet material 2 is not present in the laminated portion 3 or when the sheet material 2 is present in the laminated portion 3, the sheet material 2 is If the sheet cannot be fed, the leading edge of the next sheet material 2 does not cross the passage sensor 5. For this reason, the second feeding roller 4b and the third feeding roller 4c may continue to rotate, and the double feed prevention plate 7 may be worn. Therefore, if the leading edge of the sheet material 2 is not detected by the passage sensor 5 even after a predetermined time has elapsed, the control means 6 is turned off to prevent the feeding roller 4 from rotating. Thereby, abrasion of the double feed prevention plate 7 can be prevented. The restart is performed when the cause is removed and the restart of the apparatus is instructed.

  FIG. 4 is an external view of the sheet material feeding apparatus 1. The height of the front wall 9 is about 300 mm, and the height of the rear wall 10 is about 100 mm. The distance between the front wall 9 and the rear wall 10 can be adjusted by sliding the rear wall 10. In the case of postcards, the interval is about 150 mm. Side walls 26 are provided on the left and right so that the sheet material 2 can be easily laminated. That is, the stacked portion 3 is surrounded by the front wall 9, the rear wall 10, and the side walls 11.

  Specific angles of the front wall 9 and the rear wall 10 are shown below. The angle θ between the first inclined portion 12 and the transport line 17 was 30 degrees. The angle θ1 formed by the second inclined portion 13 and the vertical line is 25 degrees. The angle θ2 formed by the third inclined portion 14 and the vertical line is 45 °. θ2 was larger than θ1. The height of the first vertical portion 15 was 1.5 times the height of the first inclined portion 12. The minor angle θ3 formed by the first vertical portion 15 and the fourth inclined portion 16 is 150 °. The diameter of the conveying roller 8 was 33 mmφ. The internal angle of the V-shaped blade 23 was 60 °. Note that the present invention is not limited to these numerical values.

  FIG. 5 is a perspective view of a main part of the sheet material feeding apparatus 1. The feed roller 4, the transport roller 8, the double feed prevention plate 7, and the like have two sets in the left and right direction of the apparatus. This prevents the sheet material 2 from being inclined with respect to the traveling direction.

  FIG. 6 is a perspective view of the double feed prevention plate 7. The double feed prevention plate 7 is made of rubber and includes a horizontal plate portion 24 and a swash plate portion 25 extending obliquely rearward at an angle θ. The swash plate portion 25 is sandwiched between the blade 23 and the blade cover 23a.

  The present invention is suitable as a sheet material feeding device capable of separating sheet materials having different thicknesses at high speed and with reliability.

DESCRIPTION OF SYMBOLS 1 Sheet material delivery apparatus 2 Sheet material 3 Lamination | stacking part 4 Feed roller 4a 1st feed roller 4b 2nd feed roller 4c 3rd feed roller 5 Passing sensor 6 Control means 7 Double feed prevention board 8 Conveyance roller 9 Front wall DESCRIPTION OF SYMBOLS 10 Back wall 11 Side wall 12 1st inclination part 13 2nd inclination part 14 3rd inclination part 15 1st perpendicular part 16 4th inclination part 17 Conveyance line 18 Motor 19 Coil spring 20 Horizontal lamination part 21 Diagonal lamination part 22 Plate Spring 23 Blade 23a Blade cover 24 Horizontal plate portion 25 Swash plate portion 26 Retard gap 27 Retard roller 28 Separating roller

Claims (4)

A laminated portion in which a front wall and a rear wall are bent to form a horizontal laminated portion and an oblique laminated portion of a sheet material;
First to third feeding rollers for drawing out the sheet material from the bottom of the laminated portion;
A conveying roller that rotates constantly and feeds the sheet material drawn by the first to third feeding rollers;
A passage sensor for detecting the front and rear ends of the fed sheet material;
When the passage sensor detects the front end of the sheet material, the motor and the first to third feeding rollers are blocked, and when the passage sensor detects the rear end of the sheet material, the motor and the first to third feeding rollers are disconnected. Control means for connecting the feed roller;
A sheet material feeding device, comprising: a double feed prevention plate provided in contact with the second feeding roller and moving up and down by a spring that expands and contracts according to the thickness of the passing sheet material.
The front wall is inclined forward from the upper end of the second inclined portion, a first inclined portion inclined backward with respect to the transport line, a second inclined portion inclined forward from the upper end of the first inclined portion, and the second inclined portion. And the rear wall includes a first vertical portion that rises vertically from a conveying line, and a fourth inclined portion that is inclined backward from the upper end of the first vertical portion. The sheet material feeding device according to claim 1.
The double feed prevention plate includes a horizontal plate portion whose bottom surface is in contact with both the second feed roller and the third feed roller, and a slant inclined at an angle of the first inclined portion from the horizontal plate portion to the rear. The sheet material feeding device according to claim 1, comprising a plate portion.
2. The sheet material feeding device according to claim 1, wherein when the passage sensor does not detect the front end of the sheet material for a predetermined time, the control unit blocks between the motor and the first to third feeding rollers. apparatus.

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