JP2014105112A - Sheet feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet feeder that feeds stacked sheets on a one-by-one basis and that reliably prevents poor sheet feeding and double feeding from being caused by blocking of the sheets and the like, with a simple configuration.SOLUTION: A sheet feeder includes an air supply part 23 that sprays air on back ends, in a feed direction of a sheet feeding part 21, of sheets 41 stacked on the sheet feeding part 21 movable upward and downward. The state of making upside and downside sheets abut on the sheet 41 to be fed is eliminated, and the sheets 41 are fed out on a one-by-one basis from the sheet feeding part 21 by a sheet feeding roller 52 and a paper feed roller, which are feeding conveyance parts.

Description

  The present invention relates to a sheet supply device that supplies stacked sheets one by one.

  2. Description of the Related Art In recent years, it has become common for business use to allow a large amount of processing to be performed by stacking sheets with an apparatus such as a printing apparatus or a sheet folding and bonding apparatus, and sequentially supplying sheets one by one. In such an apparatus, it is necessary to diversify and fold the supplied sheets, and to prevent so-called double feed for any sheet.

  Conventionally, a sheet supply device used in a printing device or the like is a device that supplies a sheet of plain paper or stacks a predetermined amount of paper coated with a pressure-sensitive adhesive, for example. In some cases, paper feeding failure or double feed may occur due to blocking (a weakly adhering state between the upper and lower sides) or the like in the case of paper coated with a pressure sensitive adhesive, such as static electricity in the case of paper. In order to prevent such a double feed, it is proposed in the following patent documents and the like that the target sheets are separated from the abutting sheets and supplied one by one.

  In any of the following Patent Documents 1 to 3, when stacked sheets are supplied, air blowing means for blowing air to the front end side in the sheet supply direction is proposed. Such air blowing means eliminates the contact state between the upper and lower sides by blowing air to the leading end portion with respect to the supply direction, and adsorbs the paper to be supplied by air adsorption means provided on a conveyor belt or the like. Are fed one sheet at a time.

JP-A-2005-145661 JP 2005-239511 A JP 2001-063847 A

  However, although the sheets to be supplied among the stacked sheets can be separated into sheets by the air spraying means, they cannot be sent out unless they are sucked and held in order to convey and supply them. As a result, there is a problem in that it is impossible to reduce the size of the apparatus because the suction means is required for the conveyance and supply.

  SUMMARY An advantage of some aspects of the invention is that it provides a sheet feeding apparatus that reliably prevents sheet feeding failure and double feed due to sheet blocking or the like with a simple configuration.

  In order to solve the above-mentioned problem, in the invention of claim 1, a sheet supply unit that supplies stacked sheets, and air is blown to the rear end in the supply direction of the sheet supply unit with respect to the stacked sheets. It is set as the structure which has an air supply part and the supply conveyance part which sends out a sheet | seat by a sheet from the said sheet supply part.

  According to a second aspect of the present invention, the sheet supply unit is provided with an openable / closable protective cover, and the protective cover is provided with the air supply unit.

  According to the first aspect of the present invention, for the sheets stacked on the sheet supply unit, the air supply unit that blows air to the rear end in the supply direction by the sheet supply unit is provided, and the sheet supply unit is fed by the supply conveyance unit. By adopting a structure that feeds out sheets with leaves, it is not necessary to suck and hold at the leading end in the feeding direction by blowing air from the trailing end in the feeding direction to eliminate the contact state between the upper and lower of the stacked sheets, and the feeding roller Thus, it is possible to prevent a paper feed failure or double feed even when sending out, etc., and to reduce the size of the apparatus without requiring suction holding means.

  According to the second aspect of the present invention, the protective sheet is opened and closed on the sheet supply unit, and the protective cover is provided with the air supply unit that blows air to the rear end in the sheet supply direction. When the sheets are set in the sheet supply unit, the protective cover is opened and closed for each air supply unit so as not to disturb the sheet setting, and the air supply unit can be easily stacked. Regardless, it can be positioned at the rear end.

1 is an external view of a sheet folding and bonding apparatus including a sheet supply apparatus according to the present invention. It is explanatory drawing of the internal structure of the sheet folding bonding apparatus of FIG. It is explanatory drawing of the sheet supply in the sheet folding bonding apparatus of FIG. It is operation | movement explanatory drawing of the continuous sheet feeding of a sheet folding adhesion apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the sheet supply apparatus according to the present invention is described as a case where the sheet folding and bonding apparatus is provided. However, the present invention is not limited to this. The present invention can be applied to a processing apparatus and system.

  FIG. 1 shows an external view of a sheet folding and bonding apparatus provided with a sheet supply apparatus according to the present invention. In FIG. 1A, the sheet folding and bonding apparatus 11 includes a sheet crimping main body 12 and a stacker unit 13. The internal structure will be described with reference to FIG.

  The sheet crimping main body 12 includes a sheet supply unit 21 composed of a sheet placing table that can move up and down in appearance. The sheet supply roller (52), the winding roller (62A), which is described in FIG. A contact plate (62B), a sheet feed roller (63), a folding portion (71), and the like are disposed. For example, a semi-transparent (or transparent) resin protective cover 22 is provided above the rear side of the sheet supply unit 21 so as to be openable and closable with the tip side as a pivot point.

  The rear end side of the protective cover 22 has a hanging shape, and an air supply unit 23 is attached to this portion. As shown in FIG. 1 (B), the air supply unit 23 is formed integrally with a blow unit 24 and an air communication unit 25 that communicates with the blow unit 24 so that the air supply unit 25 is fitted to the tip of the air communication unit 25. The spraying part 26 is attached. In this case, the front end of the air blowing unit 26 is directed to the rear end in the supply direction of the stacked sheets placed on the sheet supply unit 21. The air blowing section 26 is slidable with respect to the air communication section 25 to be fitted, and the position of the position adjusting section 27 such as a fixing screw is near the sheet to which the stacked sheets are supplied (the uppermost position sheet). It is adjusted and fixed so that it is directed to Further, a sheet pressing portion 28 is provided in the air blowing direction from the air communication portion 25. The sheet presser 28 serves to hold the uppermost sheet so that it does not rise too much by air blowing.

  A group of folding sheets 41 that are continuously supplied are stacked and set on the sheet supply unit 21 (the sheet mounting table shown in FIG. 2). Although not shown, the sheet 41 group is formed by applying a pressure-sensitive adhesive as an adhesive to the whole or a part (for example, a peripheral edge, a striped pattern, etc.) on one or both sides of the sheet, and printing predetermined information. It is a thing. In addition, as a pressure sensitive adhesive, it is a conventional thing, it adhere | attaches by applying a predetermined pressure, is a thing of peeling or strong adhesion | attachment, and is used suitably according to the objective. Here, each sheet 41 is a single-sheet paper with a margin, a single-sheet paper with a copy, or a single-sheet sheet having an area such as three or four postcards.

  The stacker unit 13 is provided with a pressing wall 31 at a discharge position of a folded adhesive sheet 42 that is pressed by a pressing roller in a state of being perpendicular to the axial direction, which will be described later, and has a taper 34 at the discharge port. The pressing wall 31 is provided with a slidable tip regulating plate 32 that regulates the tip of the folded adhesive sheet 42 that is discharged. In addition, a slidable holding plate 33 that is slidable from the holding wall 31 to the front side of the apparatus and biased toward the holding wall 31 is provided, and when the folding adhesive sheet 42 is sequentially discharged from the discharge port. It is regulated by the tip regulating plate 32 and overlapped along the pressing wall 31.

  Here, FIG. 2 shows an explanatory diagram of the internal configuration of the sheet folding and bonding apparatus of FIG. 2A, the sheet press-bonding main body 12 includes a sheet supply unit 21, a target sheet generation unit 61, a collection unit 65, a folding unit 71, a vertical conveyance unit 81, and a pressure roller 91 (91A, 91B). In this case, the pressure roller 91 (91A, 91B) is provided on the front side in the drawing, but is indicated by a broken line in order to display the back side.

  The sheet supply unit 21 includes a sheet placement table 51 and a sheet supply roller 52. The sheet mounting table 51 is stacked and mounted so that the tip of the sheet 41 of the sheet to be crimped is positioned. The sheet mounting table 51 is movable up and down, and includes a mechanism that urges the loaded sheet 41 group to push up to the upper sheet supply roller 52. The sheet supply roller 52 is arranged in a horizontal state with respect to the apparatus installation surface, and the sheet 41 is supplied in a horizontal state from the sheet mounting table 51.

  The air supply unit 23 described above is positioned on the rear end side in the supply direction of the group of stacked sheets 41 mounted on the sheet mounting table 51, and the front end of the air blowing unit 26 is located above the rear end of the sheet (the uppermost position of the supply target). (Near the seat). That is, as shown in FIG. 2 (B), at least the lowermost sheet 41 in contact with the uppermost sheet 41 is separated by blowing air to the vicinity of the uppermost position of the sheets stacked from the air blowing unit 26. Thus, the contact state is released. At this time, the sheet pressing portion 28 suppresses the lifting of the uppermost sheet 41.

  The target sheet generation unit 61 includes a rolling roller 62A, a rubber-like friction contact plate 62B, a sheet feeding roller 63, and a cutter roller 64. The rolling roller 62 </ b> A and the friction contact plate 62 </ b> B reliably set the sheet 41 fed by the sheet feeding roller 52. The sheet feeding roller 63 guides the sheet 41 supplied from the sheet supply unit 21 to the cutter roller 64. In this embodiment, the cutter roller 64 is configured such that each sheet 41 is cut into two pieces from the center as a single piece of paper having an area equivalent to four postcards, and each is made into a sheet to be crimped (41A, 41B). . When the cutting is not performed, the cutter roller 64 is not necessary, and it is possible to select not to perform the cutting by disengaging the upper and lower blades.

  Further, when the above-mentioned margin (edge) or a sheet of single-sheet paper with a retaining piece is targeted, the sheet is cut not by the center but by a line corresponding to the margin or the retaining piece. When the blank or disc is cut by the cutter roller 64, the separated blank or disc is collected by the collecting unit 65.

  The folding part 71 is of a conventional mechanism, and includes folding blades 71A and 71B and a folding roller group 72. In this embodiment, the sheets (41A, 41B) to be pressed are V-folded to form a folded sheet, which is composed of two folding blades 71A, 71B and five folding rollers. In addition, as a crimping | compression-bonding form (folding form), it can also be set as Z-folding, entrainment folding, etc. However, since the length in the feeding direction of the folded sheet after folding is different depending on the V-folding or Z-folding, the final roller of the folding roller group 72 and reception of a vertical conveying unit 81 (described later) according to the length. The arrangement distance with the mouth is set.

  The vertical conveying unit 81 is formed with a vertical space in the vertical direction (longitudinal direction) with respect to the apparatus installation surface. The vertical conveying unit 81 receives a folded sheet from the folding unit 71 and conveys the folded sheet in the vertical direction. A pressing roller 83, a horizontal conveying belt 84 of the conveying unit, and a conveying pressing roller 85 are provided. The vertical space is formed in the lateral direction of the apparatus by the area inner wall portion 81A and the area outer wall portion 81B. It is desirable that the width of the vertical space (the distance between the region inner wall portion 81A and the region outer wall portion 81B) be narrow so as to correct the curl to the minimum.

  A vertical sheet feeding roller 82 (four rollers 82A to 82D) is arranged in the lateral direction of the apparatus to receive the folded sheet fed from the folding unit 71 on the inner wall 81A side of the vertical space, and sandwiches the vertical space. Thus, corresponding feed pressing rollers 83 (four 83A to 83D) facing the vertical feed roller 82 are arranged on the region outer wall 81B side. The vertical feed roller 82 and the feed pressure roller 83 constitute a vertical feed roller portion.

  The vertical feed roller 82 is rotated to drop the folded sheet received from the folding unit 71 into the vertical vertical space. Further, the feed pressing roller 83 assists the feed of the vertical feed roller 82 by urging the vertical feed roller 82 to be in a contact state. The feed pressing roller 83 can be released so as not to come into contact with the vertical feed roller 82, for example, manually. For example, the contact is made in the case of a relatively small folded sheet, and the contact is released in the case of a large folded sheet. When the contact is released, a restricting piece for restricting the rebound when the folding sheet is dropped on the upper side of the vertical space and bounces at the bottom may be formed.

  A conveyor belt 84 that is driven in a horizontal state with respect to the apparatus installation surface is provided on the side surface of the vertical space and on the region inner wall 81 </ b> A side. That is, the conveyance belt 84 performs vertical conveyance of the sheet by feeding the folded sheet to the pressure rollers (91A, 91B) in the vertical direction with the apparatus horizontal direction as the conveyance direction.

  Further, a conveyance pressing roller 85 (three 85A to 85C) that constitutes a pressing roller portion with a vertical space interposed therebetween is disposed opposite to the conveyance belt 84. The conveyance pressing roller 85 is driven to push the folding sheet toward the conveyance belt 84 when the folding sheet is dropped into the bottom of the vertical space, and is conveyed by the conveyance belt 84 in a state of being sandwiched with the conveyance belt 84. To assist. Although the drive mechanism of the conveyance pressing roller 85 is not shown, it is driven by a solenoid, for example.

  A predetermined number (three in this case) of position sensors 86 (86A to 86C) are arranged as sheet position detection units in the vicinity of the bottom on the region inner wall 81A side. This position sensor 86 detects the folded sheet dropped into the vertical space as one, and drives the conveyance pressing roller 85 to the conveyance belt 84 side. Further, it is possible to detect a conveyance failure (jam) of the folded sheet by measuring the detection time. By the way, it is not always necessary to provide the position sensor 86 at the bottom of the vertical space. For example, you may provide in the exit of the folding part 71, an upper side, etc. In this case, the conveyance pressing roller 85 can be driven to the conveyance belt 84 side after a predetermined time has elapsed since the detection.

  FIG. 3 shows an explanatory diagram of sheet supply in the sheet folding and bonding apparatus of FIG. 1, and FIG. 4 shows an operation explanatory diagram of continuous feeding of the sheet folding and bonding apparatus. In FIG. 3, the sheet placement table 51 of the sheet supply unit 21 is initially positioned at the lowest position. Then, the protective cover 22 is rotated together with the air supply unit 23 to open the sheet placement table 51 of the sheet supply unit 21.

  The stacked sheets 41 are mounted on the sheet mounting table 51, and the protective cover 22 is rotated downward to be in a closed state. Then, the uppermost sheet 41 of the loaded sheet 41 group raises the sheet mounting table 51 to the contact position with the sheet supply roller 52 shown in FIG. At this time, the tip portion of the air blowing portion 26 of the air supply portion 23 provided in the protective cover 22 is positioned in the vicinity of the uppermost sheet 41 of the sheet 41 group mounted. In addition, when the position has shifted, it adjusts with the position adjustment part 27 shown to FIG. 1 (B).

  Therefore, when driving is started by an operation switch or the like, air is blown to the uppermost sheet 41 of the group of sheets 41 mounted from the front end portion of the air blowing section 26 by driving of the air supply section 23, and FIG. As shown in FIG. 3, the uppermost sheet 41 of the stacked sheet 41 group is supplied in a horizontal state by the sheet supply roller 52 and guided to the sheet feed roller 63 of the target sheet generation unit 61, and is supplied by the cutter roller 64. Cut at the center to form two target sheets 41A and 41B. Here, if there is a separated blank piece or copy piece, it is collected by the collection unit 65.

  Then, as shown in FIG. 4B, each of the sheets 41A and 41B is guided as it is by the first folding roller of the folding roller group 72 of the folding portion 71 and processed into a V-fold by the folding blades 71A and 71B. Is done. Then, the sheet is fed to the vertical space of the vertical conveyance unit 81 as the folding sheets 41A and 41B by the last folding roller of the folding roller group 72.

  In the vertical space, the folded sheets 41A and 41B are received in the vertical direction by the feed rollers 82 (82A to 82D) and the feed pressing rollers 83 (83A to 83D), and are sent downward in the vertical space and dropped to the bottom. Of the position sensors 86A to 86C, for example, when the position sensors 86A and 86C detect both the folded folding sheets 41A and 41B, all the conveyance pressing rollers 85 (85A to 85C) are moved to the conveyance belt 84 side. Drive to hold the folding sheets 41 and 41B.

  The folding sheets 41A and 41B sandwiched between the conveyance belt 84 and the conveyance pressing roller 85 are pressure rollers 91A and 91B that remain in the vertical direction when the conveyance belt 84 is conveyed (at this time, each conveyance pressure roller 85 rotates in the conveyance direction). Sent out.

  Then, in the pressure-bonding rollers 91A and 91B, the folding sheet 41A is first fed and discharged to the stacker unit 13 as a folded adhesive sheet 42 bonded by pressure bonding, and then the folding sheet 41B is fed and pressurized. It is discharged to the stacker unit 13 as a folded adhesive sheet 42 bonded by bonding.

  In this way, by blowing air from the rear end in the supply direction so as to eliminate the contact state between the stacked sheets 41, there is no need to suck and hold at the front end in the supply direction, and the sheet supply roller 52 is sent out. However, it is possible to prevent a paper feed failure or double feed, and thus the apparatus can be miniaturized without the need for suction holding means.

  In addition to protecting the stacked sheets 41 by the protective cover 22, when setting the sheets 41 in the sheet supply unit 21, the protective cover 22 is opened and closed for each air supply unit 23 to disturb the sheet setting. In addition, the air supply unit 23 can be easily positioned at the rear end regardless of the number of stacked sheets.

  The sheet supply apparatus of the present invention can be used in the manufacturing industry of apparatuses or systems that supply stacked sheets one by one, such as printing apparatuses and sheet folding and bonding apparatuses.

DESCRIPTION OF SYMBOLS 11 Sheet folding bonding apparatus 12 Sheet crimping main body 13 Stacker part 21 Sheet supply part 22 Lid part 23 Air supply part 24 Blow part 25 Air communication part 26 Air spray part 27 Position adjustment part 28 Sheet pressing part 31 Pressing wall 32 Tip regulation plate 33 Presser plate 34 Taper 41 Sheet 42 Folding adhesive sheet 51 Sheet placing table 52 Sheet supply roller 61 Folding target sheet generating unit 62A Rolling roller 62B Friction contact plate 63 Sheet feeding roller 64 Cutter roller 65 Recovery unit 71 Folding unit 71A, 71B Folding blade 72 Folding Roller Group 81 Vertical Conveying Portion 81A Area Inner Wall Part 81B Area Outer Wall Part 82 Vertical Feeding Roller 83 Feed Pressing Roller 84 Horizontal Conveying Belt 85 Conveying Pressing Roller 86 Position Sensor 91A, 91B Pressing Roller

Claims (2)

A sheet supply unit for supplying stacked sheets;
An air supply unit that blows air to a rear end in a supply direction of the sheet supply unit with respect to the stacked sheets;
A feeding and conveying unit that feeds out a sheet from the sheet feeding unit;
A sheet supply apparatus comprising:   The sheet supply apparatus according to claim 1, wherein the sheet supply unit is provided with an openable / closable protective cover, and the protective cover is provided with the air supply unit.

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