JP6448040B2 - Paper feeding device and collating device - Google Patents

Description

  The present invention relates to a transport apparatus that transports a sheet and includes a multi-feed detection unit that detects whether or not the transported sheet is multi-feed, and further includes a sheet feeding apparatus including the transport apparatus and the sheet feeding device. The present invention relates to a collating apparatus including a paper apparatus.

  In a newspaper store, a collation apparatus is used to bundle advertisements delivered in bundles for each type so that they can be delivered. This collating apparatus is provided with a sheet feed stand for loading advertisements in the vertical direction. When a bundle of advertisements of each type is loaded on each sheet feed stand, the advertisement is separated one by one from each sheet feed stand. It can be taken out and stacked to form a bundle of delivery units.

  A collating apparatus is also used for bookbinding in a printing bookbinding company. This collating apparatus is also provided with sheet feeding tables arranged in the vertical direction. When the printed sheets are stacked on each sheet feeding table in a bundle formed for each page, one sheet is fed from each sheet feeding table. Separate and take out one by one and stack them while transporting them to form one bundle. The formed bundles are bound together by a stapler or glued together for bookbinding.

  In these collating apparatuses, it is desirable to reliably feed out one sheet at a time from each sheet feed table. If two copies of the same advertisement are included in one delivery destination, it is useless and also contradicts the needs of advertisers who expect the greatest possible advertising effect with a limited number of copies. Further, in bookbinding, a book that is bound while two identical pages are sent must be removed as a defective product, resulting in a decrease in yield and an increase in the burden of removal.

  Therefore, many collating devices use a double feed detection device that detects when two or more sheets are fed from a paper feed tray. In the double feed detection device, a light emitting element and a light receiving element are arranged across the paper conveyance path to detect the amount of light transmitted through the conveyed paper, and when there is one sheet or more than two sheets In case of single-sheet and two-sheets or more by using optical type that determines the double feed using the difference in transmitted light quantity or by placing ultrasonic oscillator and geophone across the paper transport path Therefore, an ultrasonic method or the like that uses the fact that the attenuation rate of the received ultrasonic wave is different is used. The collation apparatus described in Patent Literature 1 is a newspaper advertisement collation machine provided with an ultrasonic double feed detection mechanism.

  In addition to this optical type and ultrasonic type, the outer circumferences are in contact with each other, one is a reference roller with a fixed axial position, and the other is a displacement roller configured to be axially displaceable. There is a method of detecting double feed using a difference in displacement of a displacement roller when there are one sheet and two or more sheets (for example, Patent Document 2).

JP 2011-160480 A Japanese Patent Laid-Open No. 7-144792

  However, in the case of an optical multi-feed detection device, the amount of light that is transmitted in the case of one sheet or two sheets, such as a sheet that easily transmits light or a sheet that is printed with a dark color. Detection is difficult when the difference is small. Especially in the case of newspaper advertisements, most of them are printed with a wide variety of colors to draw attention, and are difficult to transmit light. Detection is almost impossible.

  On the other hand, in the case of ultrasonic double feed detection, it is possible to detect double feed even on a paper having a small difference in transmitted light quantity and difficult to detect optical double feed. Has also been proposed. However, there are many newspaper advertisements that are folded in two or four. However, the apparatus of Patent Document 1 has a problem in that double feed detection must be disabled when such advertisements are loaded. It was. Since the double-folded advertisement is folded in two, the two sheets are overlapped when viewed in the thickness direction. Therefore, in order to determine the double feed of the double-folded advertisement, the overlap in the thickness direction of the passed paper is determined. It must be determined whether it is 2 or more. In the case of four folds, it is necessary to determine whether the number is four or eight or more. However, the attenuation rate of ultrasonic waves differs greatly between the case of 1 sheet and the case of 2 sheets, but the attenuation rate does not change so much between 2 sheets and 4 sheets, or 4 sheets and 8 sheets. It was difficult to determine the double feed of a four-fold advertisement.

  In the case of printing before bookbinding, 4 or 8 pages are printed on large paper on both the front and back sides, the folded pieces are collated, the edges are cut, and the edges are cut. In such a case, a folded sheet of printed paper is loaded on the sheet feeding table of the collating apparatus and collated. However, since it is bent, ultrasonic double feed detection cannot be performed, and optical double feed detection cannot be performed when printing is dark.

  On the other hand, in the method of measuring the displacement of the roller described in Patent Document 2 (hereinafter referred to as the roller method), in principle, double-folding and quadruple-folding detection can be performed. In order to separate the paper sheets one by one, friction force and air suction / blow-off force are used, so the device may vibrate or distort due to friction of the feed roller or air switching. There is a problem that in the double feed detection of the roller system, the distortion and vibration greatly affect the measurement result, and it is difficult to detect accurately and stably.

  The present invention has been made in view of such problems. A sheet feeding device capable of stably detecting double feeding even when the printed sheet is dark and folded, and a collating apparatus including these. Is intended to be obtained at low cost.

  In order to solve the above-described problem, an aspect of the paper transport device according to the present invention includes a paper feed plate for stacking paper bundles, a separation feeding unit for feeding the uppermost paper of the paper bundle loaded on the paper feed plate, and a separation unit. A reference roller having a fixed axial position provided on the downstream side of the feeding means, a displacement roller provided opposite to the reference roller with the paper conveyance surface interposed therebetween, and the axial position of the reference roller being displaceable, and the fed paper Is a double feed detection means for measuring the displacement amount of the displacement roller when passing between the reference roller and the displacement roller, and detecting whether or not the paper is double fed according to the measurement result; A first support member that supports the reference roller and the displacement roller; and a second support member that supports the separation feeding unit, and the distortion of the second support member is applied to the first support member. This is a sheet feeding device including a distortion suppression mechanism that suppresses transmission.

  The strain suppression mechanism may be attached so that the first support member and the second support member can be displaced relative to each other. According to this configuration, it is possible to suppress the distortion of the separation feeding mechanism from being transmitted to the support members of the reference roller and the displacement roller. In addition, a vibration isolating member may be interposed between the first support member and the second support member at a portion where the first support member is attached to the second support member. According to this configuration, it is possible to suppress the vibration of the separation feeding mechanism from being transmitted to the support members of the reference roller and the displacement roller. These configurations enable highly accurate and stable double feed detection.

  The first support member is on the upper side with respect to the transport surface of the paper to be sent out, the upper support member extending in a direction orthogonal to the paper transport direction, and on the lower side with respect to the transport surface of the paper to be sent out, A support frame having a lower support member that extends in a direction orthogonal to the paper transport direction, and a connecting member that connects one end and the other end of each of the upper support member and the lower support member. The displacement roller may be supported by the other of the upper support member and the lower support member on one of the upper support member and the lower support member. According to this aspect, the support frame can be configured to be compact so as to surround the periphery of the paper transport path.

  A plurality of sheet feeding units having a sheet feeding plate for stacking a sheet bundle and a separation feeding unit for feeding the uppermost sheet of the sheet bundle loaded on the sheet feeding plate are arranged in the vertical direction and are taken out from each sheet feeding unit. In the collating apparatus that stacks sheets while conveying sheets, the collating apparatus includes at least one of the above-described sheet feeding devices as a sheet feeding unit.

   According to the present invention, there is an effect that it is possible to obtain a paper feeding device or a collating device that can detect double feeding stably even if the printed sheet is dark and folded.

It is a model front view which shows the collation apparatus 1 which concerns on this invention. It is an external view which shows the collation set S produced with the collation apparatus 1. FIG. It is the figure which looked at the paper feed mechanism 2 which employ | adopted the paper conveying apparatus which concerns on this invention from the paper feed direction downstream. FIG. 4 is a cross-sectional view of the sheet feeding mechanism 2 taken along line AA in FIG. 3. It is an enlarged view of the round hole 114a part in FIG. It is a block diagram which shows the control system of the collation apparatus provided with the paper conveying apparatus of this invention. It is a flowchart which shows operation | movement of the collation apparatus provided with the paper conveying apparatus of this invention. It is a figure which shows the rotation amount detection means provided in the rotating shaft of the conveyance motor M2. It is a figure which shows the 2nd Embodiment of this invention. It is a model front view which shows the collation apparatus 501 which concerns on the 3rd Embodiment of this invention. 3 is a top view showing a paper feed mechanism 502. FIG. It is the rear view seen from the downward direction of FIG. It is BB sectional drawing in FIG. 6 is a diagram illustrating a positional relationship with a pair of conveying rollers 112 and 113 when a paper feeding mechanism 502 is mounted on the main body. FIG. It is a control block diagram of the collation apparatus which concerns on the 4th Embodiment of this invention. It is a figure which shows the processing speed setting column. It is a figure which shows the relationship between the numerical value of the processing speed which the user set, and Va and Vb.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic front view showing a collating apparatus 1 according to the first embodiment of the present invention, and FIG. 2 is an external view showing a collating set S created by the collating apparatus 1. As shown in FIG. 2, this collation set S is a form in which a bundle of a plurality of sheets is sandwiched inside one folded sheet, and is suitable for a newspaper advertisement sandwiched between delivery newspapers. It is. That is, the collation apparatus 1 is suitable for collating advertisements that have been printed and delivered to a newspaper store for delivery.

  In the collating apparatus 1, ten paper feeding mechanisms 2a to 2j on the left side shown in FIG. 1 and ten paper feeding mechanisms 2k to 2t on the right side are arranged side by side so as to be stacked vertically. Since the paper feed mechanisms 2a to 2j and the paper feed mechanisms 2k to 2t have the same structure and are attached in opposite directions, the directions are reversed in FIG. A folding sheet feeding mechanism 2u is disposed below the left sheet feeding mechanisms 2a to 2j. The sheet feeding mechanisms 2a to 2j and the folding sheet feeding mechanism 2u have the same structure, and the sheet feeding mechanisms 2k to 2t are the same as the sheet feeding mechanisms 2a to 2j except for the opposite directions. Hereinafter, these are collectively referred to as a sheet feeding mechanism 2.

  The uppermost sheet bundle stacked on a part or all of the sheet feeding mechanisms 2 a to 2 t is separated from the sheet bundle by the separation feeding mechanism 4 and sent out to the horizontal conveyance path 6. A vertical conveyance path 7 is provided in the vertical direction in the center of the collating apparatus 1, and all the horizontal conveyance paths 6 extending from the respective paper feeding mechanisms 2 merge with the vertical conveyance path 7. Each of the paper feeding mechanisms 2 sends out the paper at such a timing that the leading ends thereof are aligned when the fed paper is merged in the vertical conveyance path 7. The sheets fed one by one from each sheet feeding mechanism 2 are stacked on each other while moving from the upper side to the lower side of the vertical conveyance path 7.

  The uppermost sheet bundle stacked on the folding sheet feeding mechanism 2u is separated from the sheet bundle by the separation feeding mechanism 4 and conveyed to the right in the drawing conveyance path 8, and the leading end of the folding stopper 9 contacts the folding stopper 9. Touch. The lower end of the vertical conveyance path 7 faces above the folding conveyance path 8, and the sheet that contacts the folding stopper 9 stops so as to block the lower end of the vertical conveyance path 7. After that, the folding knife 10 is driven, the sheet that is stopped by contacting the folding stopper 9 is wound around the folding roller 11 and folded in half, and the sheet that has descended the vertical conveying path 7 inside the folding. A bundle is entered and a collation set S is created. The collation set S is further discharged out of the apparatus from the paper discharge outlet 13 via the paper discharge conveyance path 12 and accumulated in the stacker 14.

  FIG. 3 is a view of the sheet feeding mechanism 2 employing the sheet conveying apparatus according to the present invention as viewed from the downstream side in the sheet feeding direction. 4 is a cross-sectional view of the sheet feeding mechanism 2 taken along line AA in FIG. For ease of understanding, in FIG. 3, the conveyance upper roller 113 is not shown, and the conveyance lower roller 112 is indicated only by the alternate long and short dash line, and is located upstream of the double feed detection mechanism 100 in the sheet feeding direction. Is omitted in principle.

  The sheet feeding mechanism 2 has a plate-shaped sheet feeding plate 21. A bundle of sheets P is stacked on the sheet feeding plate 21 in a state where the bundle of sheets P is slanted so that the upper sheet is forward. A separation feeding mechanism 4 is provided near the downstream end of the bundle of sheets P in the sheet feeding direction.

  The separation feeding mechanism 4 includes a paper feeding roller 22 that feeds the uppermost paper P1, a buckling plate 23 that presses against the paper feeding roller 22 from below, and an auxiliary paper feeding roller provided upstream of the paper feeding roller 22 in the paper feeding direction. 24. Each shaft that supports the paper feed roller 22 and the auxiliary paper feed roller 24 is supported by a bracket 25. A toothed pulley 26 is provided on the same axis as the paper feed roller 22, and a toothed pulley 27 is provided on the same axis as the auxiliary paper feed roller 24, and a toothed belt 28 is hung on both pulleys. A driving force can be intermittently applied to the paper feed roller 22 from a paper feed motor M1 by a drive transmission mechanism (not shown), and the drive can be transmitted to the auxiliary paper feed roller 24 via a toothed belt 28. It has become. With this configuration, the uppermost sheet P1 is fed between the paper feed roller 22 and the suction plate 23 by the auxiliary paper feed roller 24, and further downstream (right side shown in FIG. 4) by the paper feed roller 22. While being fed out, the feeding roller 22, the paper plate 23, and the paper P <b> 1 are used to prevent the feeding of the next and subsequent sheets by using the differences in frictional forces, so that only one sheet P <b> 1 is connected to the feeding roller 22. It is sent out through the space plate 23.

  The paper feed motor M1 is a DC brushless motor capable of detecting the rotation amount, and outputs a pulse signal corresponding to the detected rotation amount. Therefore, the rotation amount is controlled by feeding back the pulse signal to the motor drive signal. It is possible.

  The grill plate 23 is a plate-like member made of urethane rubber. Below the surface plate 23, there is provided a surface pressure adjustment mechanism 310 that adjusts the pressure contact force of the surface plate 23 against the paper feed roller 22 (hereinafter referred to as the surface pressure). The surface pressure adjusting mechanism 310 is provided with a surface base 311 having a surface plate 23 provided on the upper surface thereof so as to be rotatable about a rotation shaft 312 and a hemisphere 313 fixed to the lower surface. A spherical surface contacts the inclined surface on the inclined plate 314 on the lower side of the hemisphere 313. The inclined surface of the inclined plate 314 is formed to be inclined from the near side to the far side in the drawing, and the inclined plate is slid between the far side and the near side manually or automatically by a driving mechanism (not shown). The bottom plate 311 is moved up and down to adjust the pressure contact force between the bottom plate 23 and the paper feed roller 22.

  A sheet presence / absence detection sensor D1 is provided on the upstream side of the bottom plate 23. This sheet presence / absence detection sensor D1 is a reflection type optical sensor, and detects whether or not sheets are stacked on the sheet feeding mechanism 2. The sheet presence / absence detection sensor D1 and the suction pressure adjusting mechanism 310 are housed in the housing member 29. The housing member 29 is a box-like member formed by bending a plate, and the upper surface thereof is covered with a guide plate 30 except for the portion of the surface plate 23 and the sheet presence / absence detection sensor D1, and the guide plate 30 is separated and supplied. The lower side of the sheet P1 to be fed is guided. The housing member 29 has its ends fixed to frames 31 and 32 which are plates erected on both sides of the apparatus (see FIG. 4), and the guide plate 30 fills the inner width of the frames 31 and 32. It is possible to guide the formed wide paper P1.

  A paper feed sensor D <b> 2 is disposed on the downstream side of the paper feed roller 22. The paper feed sensor D2 is a transmissive sensor in which a light emitting element and a light receiving element are opposed to each other with a paper conveyance path interposed therebetween, and the optical axis is blocked by the paper sent out by the paper feed roller 22, whereby the paper Detect the passage of.

  A double feed detection mechanism 100 is provided adjacent to the downstream side of the separation feed mechanism 4. The double feed detection mechanism 100 includes a reference roller 101, a reference roller shaft 102 that supports the reference roller 101, and a displacement roller 103 that is provided so that the outer peripheral surfaces come into contact with the reference roller 101 from above. As shown in FIG. 4, the reference roller 101 and the displacement roller 103 are arranged one by one at the center between the frames 31 and 32.

  The displacement roller 103 is supported by the displacement roller shaft 104, and the displacement roller shaft 104 is fixed to one end side of the displacement lever 105. The other end side of the displacement lever 105 is rotatably supported by the fulcrum shaft 106. An upper support member 117 that is elongated in the width direction is fixedly provided above the displacement lever 105. Between the upper support member 117 and the upper support member 117 by the fulcrum shaft 106 of the displacement lever 105, Since the tension spring 108 is engaged, the displacement lever 105 is constantly applied with a force that rotates counterclockwise as shown in FIG. That is, the force is a force with which the displacement roller 103 is pressed against the reference roller 101.

  Near the one end of the displacement lever 105, a substantially horizontal detection surface 105a that is bent up is formed, and a displacement sensor 109 is provided above the detection surface 105a. The displacement sensor 109 is fixed to the sensor support member 118, and the sensor support member 118 is fixed to the upper support member 117. The displacement sensor 109 is provided with a rotation lever portion 109a below, and the rotation lever 109a is in contact with the detection lever 105a. When the sheet passes between the reference roller 101 and the displacement roller 103, the displacement roller 103 is raised by the thickness of the passed sheet, and the detection surface 105a is also raised. Then, the rising amount of the detection surface 105a is measured by rotating the rotation lever 109a and detecting the angular displacement. While the sheet is not passing, the displacement roller 103 is pressed against the reference roller 101 by the force of the tension spring 108.

  Both ends of the reference roller shaft 102 are fixed to the inside of the U-shape of the reference roller bracket 110 formed of a sheet metal bent into a U-shape so that it cannot rotate with respect to the reference roller bracket 110. Yes. A reference roller 101 is rotatably supported on the reference roller shaft 102. Since the reference roller shaft 102 is fixed so as not to rotate, the deflection of the reference roller shaft 102 does not affect the reference roller 101.

  Further, the reference roller 101 is composed of a ball bearing that is less expensive but has less vibration during rotation. Accordingly, since the deflection of the reference roller 101 itself is also suppressed, the deflection of the outer peripheral surface does not affect the displacement of the displacement roller 103, so that the displacement of the displacement roller 103 is influenced only by the thickness of the paper. Yes. Therefore, stable detection is possible.

  Below the reference roller 101, a rolling roller 111 is provided so that the reference roller 101 and the outer peripheral surface are in contact with each other. Further, a lower conveying roller 112 is provided on the downstream side of the rolling roller 111 in the sheet conveying direction so that the rolling roller 111 and the outer peripheral surface are in contact with each other. Further, an upper transport roller 113 is provided above the lower transport roller 112 so that the outer peripheral surfaces are in contact with each other (hereinafter, collectively referred to as a pair of transport rollers 112 and 113).

  A rotational driving force is applied to one or both of the conveyance roller pairs 112 and 113 from a conveyance motor M2 (see FIG. 1) via a drive transmission means (not shown). The conveyance motor M2 is arranged at the bottom of the collating apparatus 1, and is conveyed vertically by conveying roller pairs 112 and 113 of all the paper feeding mechanisms 2 of the collating apparatus 1 by a transmission means (not shown) such as a timing belt. This is a common drive source that transmits drive to the transport rollers in the path 7 and the paper discharge transport path 12. A rotation amount detection means is provided on the rotation shaft of the transport motor M2. As shown in FIG. 8, the rotation amount detection means 300 rotates a disk 302 having a large number of openings (may be cut out from the outer edge) in the vicinity of the outer edge in an annular manner together with the rotary shaft 301. The optical sensor 303 capable of detecting this opening is further provided. When the shaft 301 and the disc 302 are rotated, the optical axis of the optical sensor is blocked by a number of times proportional to the rotation amount. The rotation amount is detected by the number of pulses. Therefore, the pulse obtained by the rotation amount detection means 300 is proportional to the rotation amount of the conveyance motor M2, and the rotation amount of the conveyance rollers in the conveyance roller pair 112, 113, the vertical conveyance path 7, and the discharge conveyance path 12 is also measured. Proportional. Hereinafter, this pulse is called a main pulse.

  The leading edge of the sheet P1 that has passed between the reference roller 101 and the displacement roller 103 enters between the pair of conveying rollers 112 and 113 and is further sent downstream. In this way, the paper P1 fed by the rotation of the paper feed roller 22 and passed through the double feed detection mechanism 100 is further transported by the transport roller pairs 112 and 113. Accordingly, the paper feed roller 22 and the conveyance roller pair 112 and 113 function as a sheet conveyance unit. Further, a paper arrival detection sensor D3 for detecting the arrival of paper is provided in the vicinity of the nip portion of the pair of conveying rollers 112 and 113. This D3 is a reflective optical sensor that detects the arrival of a sheet that moves forward between both rollers.

  The driving force of the lower conveying roller 112 is transmitted to the reference roller 101 via the rolling roller 111 by contact between the outer peripheral surfaces. When the reference roller 101 is driven, the double feed detection device itself has a force to carry the paper, so that the double feed can be detected while the paper P1 is stably carried. Further, since the driving force is transmitted by the frictional force between the outer peripheral surfaces of the rollers, the linear velocity of the lower conveying roller 112 and the reference roller 101 can be matched with a simple mechanism with few components, and the reference roller shaft 102 is Since the reference roller 101 can be rotated without rotating, the influence of the deflection of the reference roller shaft 102 can be eliminated from the displacement measurement result. The rolling roller 111 is preferably provided with an elastic material such as rubber so as to ensure drive transmission, and is provided so as to be in pressure contact with the lower conveying roller 112 and the reference roller 101.

  The double feed detection mechanism 100 is provided between the paper feed roller 22 and the conveyance roller pairs 112 and 113, and the displacement lever 105 is disposed so that the longitudinal direction is orthogonal to the paper conveyance direction. Therefore, when the displacement roller is displaced upward, the radial direction of the arc drawn by the locus of the displacement is orthogonal to the paper transport direction. With this configuration, the length of the space for installing the double feed detection mechanism 100 in the sheet conveyance direction can be reduced, so that it can be efficiently arranged even in complicated parts where rollers and the like are arranged in the front and rear. Further, the rotation diameter of the displacement lever 105 (the diameter of the arc that describes the displacement locus of the displacement roller 103) can be formed longer without lengthening the paper transport path. Therefore, since the inclination of the outer peripheral surface when the displacement roller 103 is raised can be suppressed to such an extent that the displacement measurement result is not affected, stable detection can be performed.

  The reference roller bracket 110 formed in a U-shape is fixed to the lower support member 114 on the back side of the U-shape. The lower support member is a prismatic member that is formed long in the width direction, and side support members 115 and 116 are provided on both ends of the lower support member in the upward direction, and are connected to the upper support member 117. The upper support member 117 is a prismatic member formed long in the width direction. The side support members 115.116 have bent portions 115a and 116a that are bent on the crank in the width direction. The upper support member 117, the lower support member 114, and the side surface support members 115 and 116 form a rectangular support frame (first support member) that is long in the width direction, and the sheet passes through the inside. ing. This support frame body is secured to be hard to be deformed by the prismatic shape of the lower support member 114 and the upper support member 117 and the bent portions 115a and 116a of the side support members 115 and 116. A bracket 107 is fixed to the side surface support member 116, and a fulcrum shaft 106 that is a rotation fulcrum of the displacement lever 105 is supported by the bracket 107. Accordingly, all members constituting the double feed detection mechanism 100 are supported by the support frame.

  The lower support member 114 is provided with a round hole 114a in the vicinity of the left end in FIG. 3 and a long hole 114b in the horizontal direction near the right end. FIG. 5 is an enlarged view of the round hole 114a in FIG. A flanged column 119 fixed to the accommodating member 29 is inserted through the round hole 114a. With this configuration, even if the housing member 29 is distorted due to the operation of the apparatus and the distance between the two columns 119 changes, the elongated hole 114b absorbs the change. Therefore, even if distortion occurs due to the operation of the apparatus or the like in the housing member 29 or the frames 31 and 32 that are fixedly supporting the housing member 29, the distortion does not affect the support frame body, and therefore double feed detection. The mechanism 100 is not affected. Further, a vibration isolating member 122 is interposed between the housing member 29 and the lower support member 114. The vibration isolation member 122 is formed of an elastic material such as silicon rubber. With this configuration, it is possible to suppress the vibration of the entire apparatus from being transmitted to the support frame through the housing member 29, and accordingly to be prevented from being transmitted to the double feed detection mechanism 100. For the elongated hole 114b, the cross-section passing through the center is the same as that in FIG. 5 except that the hole shape is different in the width direction. In the present embodiment, the vibration isolation member 122 is provided only around the round hole 114a and the long hole 114b, but may be provided over the entire width of the lower support member 114. One end of two right and left angle members 120 is fixed to the upper support member 117. A stay 121 having both ends fixed to the left and right frames 31 and 32 is provided on the upstream side of the upper support member 117 in the sheet conveying direction, and the bent portion of the other end of the angle member 120 is hooked on the stay 121. With this configuration, the support frame is prevented from falling to the downstream side in the sheet conveyance direction. An anti-vibration member 123 is also interposed in this hooking portion. The vibration isolation member 123 is also formed of an elastic material such as silicon rubber. A shaft that supports the paper feed roller 22, a housing member 29, and a stay 121 are fixed to the frames 31 and 32, and these members form a second support member that supports the separation and feeding mechanism 4.

  FIG. 6 is a block diagram showing a control system of the collating apparatus provided with the paper conveying apparatus of the present invention. The control unit 200 controls each mechanism of the collating apparatus, and includes a ROM that stores various control programs and a RAM that is used as a work area for data storage and program execution. The operation panel 201 is a panel for performing display and input / output for the user to operate the collation apparatus, and is configured by a touch panel display, for example.

  The conveyance motor M2 is a common drive source for rotationally driving the conveyance rollers 112, 113, the vertical conveyance path 7, and the discharge conveyance path 12 of all the paper feeding mechanisms 2. An optical sensor 303 is connected to the control unit 200 so that a main pulse can be sent from the rotation amount detection means 300 to the control unit 200.

  The paper feed motor M1 is a DC brushless motor capable of detecting the amount of rotation for driving the paper feed roller 22, and is capable of feedback control by sending the detected amount of rotation to the control unit 200. Along with the paper feed control unit 202 that drives and controls M1, each paper feed mechanism 2 is provided. The paper feed control unit 202 of each paper feed mechanism 2 is connected to the control unit 200, and a main pulse is always sent from the control unit 200 and receives a paper feed trigger signal from the control unit 200. The paper feed control unit 202 counts the number of main pulses after receiving the paper feed trigger signal, and sends a rotation start signal to the paper feed motor M1 when the predetermined number is reached. After receiving the paper feed trigger signal, the respective paper feed mechanisms 2 start to operate sequentially from above so that the leading edges are aligned when the sheets sent from the respective paper feed mechanisms 2 overlap in the vertical conveyance path 7. In addition, a predetermined number is determined for each sheet feeding mechanism 2.

  Further, the control unit 200 is connected to a displacement sensor 109, a paper presence / absence detection sensor D1, a paper feed sensor D2, and a paper arrival detection sensor D3, and each detection result can be input. Each sensor is also provided for each sheet feeding mechanism 2. A one-dot chain line in FIG. 6 schematically represents one sheet feeding mechanism 2. The portion surrounded by the one-dot chain line is connected to the control unit 200 by the number of the paper feed mechanisms 2, but only one paper feed mechanism 2 is shown in FIG. 6 and the rest are omitted.

  FIG. 7 is a flowchart showing the operation of the collating apparatus provided with the sheet conveying apparatus of the present invention. Hereinafter, with reference to FIG. 6 and FIG. 7, the operation of the collating apparatus provided with the sheet conveying device of the present invention will be described.

  First, the user inputs the number Cx of bundles to be created by the collating device on the operation panel 201 (S01). For example, if 300 bundles are to be created, 300 is input here, and the control unit 200 stores the bundle creation number C = 300.

  Next, when the user operates (touches or depresses) the start switch on the operation panel 200 (S02), the bundle count number C is set to 0 (S03), the drive of the transport motor M2 is started (S04), and the transport roller pair 112, 113 and the conveyance rollers in the vertical conveyance path 7 and the discharge conveyance path 12 start to rotate. Further, the reference roller 101 is rotated from the lower conveying roller 112 through the rolling roller 111 by frictional contact. Further, since the displacement roller 103 is in contact with the reference roller 101 when the conveyance of the sheet has not started, the displacement roller 103 also rotates.

  A paper feed trigger signal is transmitted from the control unit 200 to each paper feed mechanism 2 at a predetermined timing after the rotation of the transport motor M2 is started, and after the transmission, counting of main pulses is started (S05). In each paper feed mechanism 2, when a predetermined pulse elapses after receiving the paper feed trigger signal (S06), the paper feed motor M1 starts driving (S06), and the paper feed roller 22 and the auxiliary paper feed roller 24 start to rotate. Only the uppermost sheet P1 is separated and passes between the sheet feed roller 22 and the suction plate 23.

  When the leading edge of the paper P1 is detected by the paper feed sensor D2 (S08), the paper feed motor M1 is stopped (S09), and the drive resumption timing of the paper feed motor M1 is calculated (S10). Specifically, after the stop signal of the paper feed motor M1 is transmitted, the rotation amount of the paper feed motor M1 rotated until the paper feed motor M1 actually stops (that is, the leading edge of the paper P1 is fed by the paper feed sensor D2 due to inertial force). The amount of rotation corresponding to the amount of advance beyond the optical axis (hereinafter referred to as excess rotation amount) is measured. Then, the paper feed motor M1 stops rotating for the time obtained by subtracting the time corresponding to the excess rotation amount from the theoretical value of the time required for the leading edge of the paper to start from the paper feed sensor D2 and join the vertical conveyance path 7. Then, the resumption timing of the paper feed motor M1 is calculated so that the conveyance is resumed. When the resumption timing comes, the drive of the paper feed motor M1 is resumed (S11), and the advance of the paper is resumed.

  The drive start timing of the paper feed roller M1 in step S07 is determined so that the leading edges of the papers sent from the paper feed mechanisms 2 are aligned at the time of merging in the vertical conveyance path 7, but actually before sending out. If the paper P1 is fed out as it is due to variations in the position of the paper P1 or due to slippage between the paper feeding roller 22 and the paper P1 that occurs when the paper is sandwiched between the paper feeding roller 22 and the suction plate 23, the leading edge In order to prevent this, the paper feed motor M1 is once stopped at a position where the paper has advanced to some extent, and then restarted at a timing according to the position of the leading edge of the paper P1 at the time of the stop. The tip is prevented from shifting.

  When restarted, the paper P1 moves between the displacement roller 103 and the reference roller 101 in the order of the conveying roller pair 112, 113 and advances, and the leading edge is detected by the paper arrival detection sensor D3 (S12). Next, the paper feed motor M1 stops, but the paper P1 continues to advance as it is because it is already sandwiched between the transport roller pairs 112 and 113 that are rotationally driven by the transport motor M2. Since the one-way clutch is inserted between the paper feed roller 22 and the auxiliary paper feed roller 24 between the support shafts, even if the paper feed motor M1 is stopped, the paper feed roller 22 and the auxiliary paper feed roller 24 are idled by the fed paper P1.

  After a predetermined time (30 msec in this embodiment) has elapsed since the leading edge of the paper was detected by the paper arrival detection sensor D3, the numerical value n is reset to zero (S14), and n is further increased by 1 (S15), and the displacement Data Vn of the sensor 109 is collected (S16). Next, it is determined whether or not the trailing edge of the paper P1 is detected by the paper arrival detection sensor D3 (S17). If not detected, the process returns to S15. Immediately after the leading edge of the paper P1 is detected by the paper arrival detection sensor D3 in S14, the leading edge of the paper P1 has just entered between the reference roller 101 and the displacement roller 103, and the displacement roller 103 jumps due to the impact. Since the position is not stable, the measurement of Vn is started after a predetermined time has elapsed. The data Vn is repeatedly sampled until the trailing edge of the paper is detected by the paper arrival detection sensor D3. The collection of Vn is performed at regular time intervals (1 msec in this embodiment). If the trailing edge of the paper is detected by the paper arrival detection sensor D3, the process proceeds to S18-1, and among the collected data Vn, the first 15 (V1 to V15), the second 15 (V16 to V30), 3 In each of the fifteen (V31 to V45), the highest value and the next highest value, the lowest value and the next lowest value are deleted, and the average value VL1. VL2 and VL3 are respectively calculated (S18-1).

  Next, each average average value VL1. Each of VL2 and VL3 is compared with the reference value Vs. If both VL1 and VL2 exceed Vs, or both V2 and V3 exceed Vs, the process proceeds to S19. If not, the process proceeds to S20 (S18-2). The reference value Vs is a value of Vn acquired when only one sheet passes (one sheet folded in the case of two folds and one sheet folded in the case of four folds). In addition, it is a value obtained by adding a predetermined margin value, and is a threshold value serving as a reference for determining whether or not double feeding is performed. When the displacement of the displacement roller 101 that has passed this time exceeds Vs, it can be determined that double feed. In the present embodiment, the measurement area is divided for every 15 measurements from the beginning, and the average of each is compared with Vs, and when two areas continuously exceed Vs, it is determined as double feeding. The detection accuracy is improved. When it is determined in S18-2 that double feed is made (Y in S18-2), the operation panel 201 displays that a double feed error has occurred (S19), and stops the conveyance motor M2 to stop the apparatus. (S23). If the length of the paper P1 is short, the trailing edge of the paper P1 may reach the paper arrival detection sensor D3 before the final number of Vn reaches 45. In that case, only VL1 and VL2 are obtained, and it is determined whether or not both are continuously higher than Vs. Similarly, if the number of Vn does not reach 30, it is determined only by VL1. Further, when the length of the sheet P1 is relatively long, VL4, VL5,... Are similarly obtained using the data after V46, and whether there is a place where Vs continuously exceeds Vs. It may be determined whether or not.

  If it is not determined to be double feeding in S18-2 (N in S18-2), the bundle count C is incremented by 1 (S30). Thus, the bundle count number C is a numerical value obtained by counting the number of bundles actually created. If the bundle count has reached the number of copies to be created, that is, if C has reached Cx (Y in S21), the creation of the desired number of copies has been completed, and the apparatus is stopped (S23). If C has not reached Cx (N in S21), it is further detected by the sensor D1 that there is no paper in any of the paper feed mechanisms 2, or if the user operates the stop switch (S22). In Y), the apparatus is also stopped (S23). If any sheet remains in any of the sheet feeding mechanisms 2 and the stop switch is not operated (N in S22), the process returns to S05 to start collating the next bundle.

  In this way, a series of collation is repeated Cx times, for example, if Cx = 300 is set, the collation apparatus stops after collating 300 bundles, and when the displacement sensor 109 detects double feed, A message to that effect is displayed and the collation apparatus 1 stops.

  The paper P1 temporarily stopped by the paper feed sensor D2 is arranged on the upstream side of the double feed detection mechanism 100, and the paper P1 is temporarily stopped by collecting displacement data after the leading edge of the paper P1 passes through the double feed detection mechanism 100. During the sampling of the displacement roller 109, accurate measurement is not hindered by the impact of stopping or restarting while keeping the leading end alignment good after restarting.

  Next, a second embodiment will be described. FIG. 9 is a diagram showing a second embodiment of the present invention, which is a sectional view cut along a line corresponding to the line AA in FIG. Members having the same shape and function as those of the first embodiment are assigned the same numbers as those of the first embodiment, and detailed descriptions thereof are omitted.

  In the second embodiment, the rolling roller 111 of the first embodiment is not provided, and instead, a timing pulley 412 provided coaxially with the conveying lower roller 112, and a timing pulley 401 provided coaxially with the reference roller 101, A timing belt 411 hung between the timing pulleys 401 and 412 is provided. The lower conveyance roller 112 and the timing pulley 412 are applied with the rotational driving force of the conveyance motor M2 from the same support shaft, so that the timing belt 411 rotates to drive the timing pulley 401.

  Similarly to the first embodiment, the reference roller shaft 102 is fixed to the bracket 110 so as not to rotate. That is, both the reference roller 101 and the timing pulley 401 are provided so as to rotate around the non-rotating reference roller shaft 101, and the side surfaces of the reference roller 101 and the timing pulley 401 are bonded or screwed to each other. The driving force 401 is transmitted to the reference roller 101.

  Therefore, as in the first embodiment, since the reference roller shaft 102 does not rotate, the detection result of the displacement sensor 109 is not affected by the shake of the reference roller shaft 102. If only the reference roller 101 is manufactured with high accuracy, the influence of the shake of the rotating parts on the detection result can be minimized.

  It is desirable that the timing pulley 401 is formed to have a smaller diameter than the reference roller 101 so as not to affect the conveyance of the sheet P1.

   Also in the second embodiment, it is desirable to use a ball bearing for the reference roller 101 in order to reduce the cost of the apparatus. In this case, since the bearing itself cannot be processed, the drive may be transmitted by interposing a member between the timing pulley 401 and the bearing so as to press the outer ring portion of the bearing and transmit the drive by frictional force.

  Next, a third embodiment will be described. FIG. 10 is a schematic front view showing a collating apparatus 501 according to the third embodiment of the present invention. About the member which is common in 1st Embodiment, the same number as 1st Embodiment is provided and detailed description is abbreviate | omitted.

  A collating apparatus 501 according to the third embodiment includes a paper feeding mechanism 502 (502a to 502u) instead of the paper feeding mechanism 2 (2a to 2u) in the collating apparatus 1 according to the first embodiment. The paper feeding mechanism 502 is different from the paper feeding mechanism 2 in that the paper feeding mechanism 502 can be attached to and detached from the collating apparatus 501 main unit for each stage. FIG. 10 shows a state where the paper feeding mechanism 502t is removed from the collating apparatus 501 main body. A paper feed mechanism accommodating portion 502ta is formed on the main body side, and the paper feed mechanism 502t can be inserted and fixed by an appropriate guide and fixing means. It is also possible to release the paper feeding mechanism 502 mounted on the main body and remove it. The paper feed mechanism 502 includes frames 531 and 532 directly provided for each paper feed mechanism 502, each of which includes the paper feed plate 21, the separation feed mechanism 4, and the double feed detection mechanism 500 (detailed configuration will be described later). It is supported indirectly and can be attached to and detached from the main body together with the frames 531 and 532.

  11 is a top view showing the paper feed mechanism 502, FIG. 12 is a rear view seen from below in FIG. 11, FIG. 13 is a cross-sectional view taken along the line BB in FIG. 11, and FIG. It is a figure which shows the positional relationship with the conveyance roller pair 112,113 at the time of doing. Also, FIG. 11 shows the positions of the transport upper roller 113 and its support shaft when mounted on the main body, and FIG. 12 shows the positions of the transport lower roller 114 by a one-dot chain line. Further, in order to facilitate understanding of the double feed detection mechanism 500, members on the upstream side in the paper feeding direction from the double feed detection mechanism 500 are omitted in FIG. 12, and the back side frame 531 is not shown in FIG. did. In each of the drawings, the same reference numerals as those in the first embodiment are given, but a part of the description is omitted, but the shapes, configurations, and functions are the same as those in the first embodiment.

  As shown in FIG. 11, a shaft for supporting the paper feed roller 22 is supported between the left and right frames 531 and 532, and a motor M1 is provided on the frame 531 side. Further, both ends of the sheet feeding plate 21, the accommodating member 29, and the stay 121 are fixedly supported by the frames 531 and 532. The outer sides of the frames 531 and 532 are covered with covers 533 and 534, respectively, and the covers 533 and 534 can be inserted into the collating apparatus 501 and attached. A connector 535 is provided below the cover 533. When the connector 535 is attached to the main body of the collation apparatus 501, the main body side connector is connected, and power supply to the motor M1 and a communication line for control are connected.

  As shown in FIG. 12, a double feed detection mechanism 500 is provided at substantially the center in the width direction of the frames 531 and 532 in place of the double feed detection mechanism 100 in the first embodiment. The double feed detection mechanism 500 will be described below.

  In the double feed detection mechanism 500, the reference roller shaft 102 that supports the reference roller 101 is supported by the reference roller bracket 510. The reference roller bracket 510 is a U-shaped member supported by the lower support member 114, and both ends of the reference roller shaft 102 are fixed to the inside of the U shape so as not to rotate. The reference roller 101 is rotatably supported with respect to the reference roller shaft 102.

  One end of the displacement roller shaft 104 that supports the displacement roller 103 is fixed to one end of the displacement lever 505. The displacement lever 505 can swing around a fulcrum shaft 506. The fulcrum shaft 506 is erected horizontally on a bracket 507 fixed to the lower surface of the upper support member 117. A spring 508 is hung between a spring hook portion 507 a formed at the end of the bracket 507 on the downstream side in the sheet conveyance direction and the other end of the displacement lever 505. The spring 508 urges the displacement lever 505 in a direction that rotates counterclockwise in FIG. 13, and thus the displacement roller 103 is urged so as to come into pressure contact with the reference roller 101.

  A detection surface 505a is formed above one end of the displacement lever 505, and the rotation end of the rotation lever portion 109a of the displacement sensor 109 is in contact with the detection surface 505a. When the sheet passes between the reference roller 101 and the displacement roller 103, the displacement roller 103 is raised by the thickness of the passed sheet, and the detection surface 505a is also raised. Then, the rising amount of the detection surface 505a is measured by rotating the rotation lever 109a and detecting the angular displacement. While the sheet is not passing, the displacement roller 103 is pressed against the reference roller 101 by the force of the spring 508.

  The longitudinal direction of the pivot lever 105 in the first embodiment is orthogonal to the paper transport direction, whereas the pivot lever 505 in the third embodiment has a longitudinal direction relative to the paper transport direction. Since it is parallel, there exists an advantage that the installation space of the width direction can be comprised small.

  One end of a shaft 513 is fixed to the outside of one of the U-shaped surfaces of the bracket 510, and one end of a rolling roller bracket 514 is supported on the other end of the shaft 513 so as to be swingable around the shaft 513. Yes. One end of the rolling roller shaft 515 is fixed to the other end of the rolling roller bracket 514, and the rolling roller 111 is rotatably supported on the other end of the rolling roller shaft 515. A spring hooking portion 510a is raised at the lower end portion of one side of the conical shape of the bracket 510. Further, a spring hooking portion 514 a is raised at one end portion of the rolling roller bracket 514. A spring 516 is hung between the spring hook portions 510a and 514a. Due to the biasing force of the spring 516, the rolling roller bracket 514 is biased clockwise about the shaft 513 as shown in FIG. 13, and the rolling roller shaft 515 is in contact with the stopper portion 510b of the bracket 510. It has become.

  When attached to the collating apparatus 501 main body, it is inserted into the apparatus with the left side in FIG. 13 as the head. The rolling roller 111 contacts the lower conveyance roller 112 during insertion. If the insertion is continued, the rolling roller bracket 514 rotates counterclockwise as shown in FIG. 13, and the rolling roller shaft 515 is separated from the stopper portion 510b. When the mounting is completed, as shown in FIG. 14, the rolling roller 111 is configured to come into pressure contact with the lower conveying roller 112 by the biasing force of the spring 516. This is the same direction as the direction of movement of the paper feed mechanism 502 when it is attached to the printer. The rolling roller 111 is exposed and positioned on the leading side in the moving direction when the paper feeding mechanism 502 is mounted. With this configuration, the rolling roller 111 can be configured to be in pressure contact with the lower conveyance roller 112 simply by mounting the paper feeding mechanism 502 on the main body. Even if there is a mechanical error in the position of the lower conveying roller 112, the rolling roller bracket 514 that supports the rolling roller 111 can absorb the error by rotational displacement.

  According to the third embodiment of the present invention, since the paper feed mechanism 502 is detachably provided, it can be easily removed from the main body when a paper jam occurs. In addition, the paper feed mechanism 502 provided with the double feed detection mechanism 500 is only a part of the paper feed mechanisms that the collating apparatus 501 has, and the paper feed mechanisms are exchanged to provide a paper feed mechanism at an arbitrary position. Can be detected.

  As in the third embodiment, in the paper feeding mechanism that is unitized and can be attached to and detached from the collator main body, the longitudinal direction of the displacement lever is configured to be orthogonal to the paper transport direction as in the first embodiment. May be.

  Next, a fourth embodiment of the present invention will be described. About the member which is common in 1st Embodiment, the same number as 1st Embodiment is provided and detailed description is abbreviate | omitted. FIG. 15 is a control block diagram of the collating apparatus according to the fourth embodiment of the present invention. In the fourth embodiment, an operation panel 203 is provided instead of the operation panel 201 in the first embodiment. The operation panel 203 includes a processing speed setting field 210.

  FIG. 16 is a diagram showing the processing speed setting column 210. The processing speed setting field 210 is displayed on a part of the touch panel. The processing speed setting field 210 includes a processing speed display field 224 and a processing speed selection button 226. In the processing speed display field 224, the processing speed of the collation process is displayed in 10 levels from 1 to 10. The collating apparatus executes the collating process at the lowest speed when the processing speed is “1”, and executes the collating process at the highest speed when the processing speed is “10”. Specifically, the collating apparatus slows down the processing speed by slowing down the speed of the transport motor M2, and speeds up the processing speed by speeding up. When the speed of the transport motor M2 changes, the speed of the transport rollers in the pair of transport rollers 112 and 113 of all the paper feed mechanisms 2 and the transport rollers in the vertical transport path 7 and the discharge transport path 12 changes. That is, the sheet conveyance speed in the horizontal conveyance path 6, the vertical conveyance path 7, and the paper discharge conveyance path 12 changes. The user touches the processing speed selection button 226 to change the processing speed of the collation process.

  The timing at which the sheet feeding motor M1 of each sheet feeding mechanism 2 starts to rotate is time-differenced so that the leading edges of the sheets are aligned when they merge in the vertical conveyance path 7, but the timing is different for each sheet feeding mechanism 2. Every time, it is determined that a predetermined number of main pulses have been received from the paper feed trigger signal transmission. Since the main pulse is acquired from the rotation amount detection means 300 provided on the output shaft of the transport motor M2, the number of main pulses per unit time increases as the speed of the transport motor M2 increases, and decreases as the speed decreases. . Therefore, even if the speeds of the horizontal transport path 6 and the vertical transport path 7 are changed, each paper feed mechanism 2 is arranged at the timing when the leading ends of the sheets are aligned when they are merged in the vertical transport path 7 according to the changed speed. The paper is sent out from.

  Further, since the interval from the paper feed trigger transmission to the next paper feed trigger transmission is also determined by the number of main pulses, the interval at which each paper feed mechanism 2 sends out the paper when the speed of the transport motor M2 is increased. Becomes shorter and becomes longer as it slows down. Therefore, the faster the transport motor M2, the more the number of collation sets S that can be created per unit time.

  The rotational speed of the paper feed motor M1 is set according to the setting in the processing speed setting column 210 so that the peripheral speed Va of the paper feed roller 22 and the peripheral speed Vb of the transport roller pair 112, 113 are Va ≦ Vb. The

  If the peripheral speed of the transport roller pair 112, 113 is slower than the peripheral speed of the paper feed roller 22 (Va> Vb), the paper feed roller is reached after the leading edge of the paper P1 reaches the transport roller pair 112, 113. Deflection occurs between the pair 22 and the conveyance roller pairs 112 and 113, and the double feed detection mechanism 100 cannot detect the double feed.

  In the present embodiment, Va ≦ Vb is satisfied, so that the sheet P1 can be stably detected without being bent. The second embodiment is the same as the first embodiment except that the processing speed can be set and Va and Vb are controlled by the setting.

  FIG. 17 is a diagram showing the relationship between the numerical value of the processing speed set by the user and Va and Vb. Vb is proportional to the value of the processing speed, and Vb increases (fastens) as the value increases. On the other hand, Va is a constant value (hereinafter referred to as Vc) without changing with respect to the setting of the processing speed in the range of the processing speed of 3 to 10. If the peripheral speed of the paper feed roller 22 is increased too much, variations in acceleration / deceleration at the time of paper feed and drive restart, and variations due to slip between the paper feed roller 22 and the paper P increase, and the leading edge of the paper after merging This is because Va does not exceed Vc. At the processing speeds 1 and 2, Vb is lower than Vc. Therefore, Va is controlled to be lower than Vc so that Va = Vb. Also, the present invention is not limited to this, and Va may be set slightly slower than Vb when the processing speed is 1 or 2.

  With this control, it is possible to obtain a sheet feeding device capable of detecting stable double feed without causing deflection of the sheet, and to obtain a collating device having a good alignment of the leading ends after merging.

  DESCRIPTION OF SYMBOLS 1 Collating device, 2a-2t paper feed mechanism, 2u folding paper feed mechanism, 21 paper feed plate, 22 paper feed roller, 23 Sakiki plate, 101 reference roller, 102 reference roller shaft, 103 displacement roller, 104 displacement roller shaft, 105 , 505 Displacement lever, 105a, 505a detection surface, 109 displacement sensor, 109a rotating lever, 111 rolling roller, 114 lower support member, 114a long hole, 114b round hole, 115, 116 side support member, 117 upper support member, 119 pillar, 122 anti-vibration member, 123 anti-vibration member

Claims (3)

A paper feed plate for stacking paper bundles;
A separation feeding means for feeding the topmost sheet of the stack of sheets stacked on the sheet feeding plate;
A reference roller having a fixed axial position provided on the downstream side of the separating and feeding means;
A displacement roller provided opposite to the reference roller with the sheet conveying surface interposed therebetween, the axial position of which can be displaced;
Measures the displacement of the displacement roller when the fed paper passes between the reference roller and the displacement roller, and detects whether or not the paper is being double-fed according to the measurement result. Detection means;
A first support member that supports the reference roller and the displacement roller;
A second support member that supports the separating and feeding means,
An anti-vibration member is interposed between the first support member and the second support member at a portion where the first support member is attached to the second support member. Paper feeder. The first support member is
An upper support member extending in a direction perpendicular to the paper transport direction on the upper side with respect to the transport surface of the fed paper;
A lower support member that extends downward in a direction perpendicular to the paper transport direction, with respect to the transport surface of the paper to be sent out;
It is a support frame having a connecting member that connects one end and the other end of each of the upper support member and the lower support member,
2. The supply according to claim 1, wherein the reference roller is supported by one of the upper support member and the lower support member, and the displacement roller is supported by the other of the upper support member and the lower support member. Paper device. A paper feed plate for stacking paper bundles;
A separation feeding means for feeding the topmost sheet of the stack of sheets stacked on the sheet feeding plate;
A plurality of sheet feeders having
In the collating apparatus that stacks paper while transporting the paper taken out from each paper feed unit,
As the paper feed unit, collation apparatus characterized by comprising at least one sheet feeding apparatus according to claim 1 or 2.

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