JPH0761184A - Sheet feed device - Google Patents

Abstract

PURPOSE:To feed sheet continuously by delivering only one sheet on a lowermost layer of all laminated sheets by the back and forth movement of a delivery body, moving back and forth a pawl section following the delivery and retaining a sheet laminate body on the upper layer section. CONSTITUTION:The whole of a device 20 is constituted of a stocking means 21 on which laminated sheets 2 (bags 4) are placed, a delivery means 22 for delivering sheets 2 on a lowermost layer one by one from the stocking means 21, a retaining means 23 for retaining a laminate 2a of the sheet 2 during the delivery and a conveyor means 24 for conveying one delivered sheet 2. A delivery body 25 is moved back and forth by a back and forth driving means 28 in the state that the sheet 2 on the lowermost layer is sucked to a recessed section provided with a suction hole in the delivery means 22. A pawl section 31 movable back and forth between the sheet 2 on the lowermost layer and a sheet laminate 2a on an uppermost layer section is moved by a retaining and driving means 33 of the retaining means 23 following the progress of the delivery body 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically inserts a file sheet into a sheet feeding device, for example, a bag forming the file sheet, when inserting the insertion sheet forming the core material of the file sheet. To a device for supplying the same.

[0002]

2. Description of the Related Art Conventionally, a file book 1 as shown in FIG. 1 (A) is known. Book 1 for this file
Is a binding sheet 3 in which a large number of filing sheets 2 formed in a bag shape with a transparent or translucent synthetic resin film are bound.
The bag 4 forming each file sheet 2 has an opening 5 at one side edge, and an insertion sheet 6 made of a sheet is inserted into the bag.

[0003]

When manufacturing a known file book 1, the bags 4 constituting the respective file sheets 2 are automated by a bag making machine and are mass-produced.

However, the work of inserting the insertion sheet 6 into the file sheet 2 has heretofore been carried out mainly by manual work, which is inefficient and an obstacle to cost reduction.

As a technique for automation relating to this point, the present applicant has previously proposed Japanese Patent Publication No. 1-36798 (Japanese Patent Application No. 58-58535), which is used as a core material during the bag making process. Since it is a technique for simultaneously inserting the insertion sheet as described above, it cannot be applied to the work of inserting the insertion sheet after the fact for the file sheet for which bag making has already been completed.

[0006]

The present invention provides an apparatus which solves the above-mentioned problems. That is, the present invention relates to a sheet supply device, which enables automatic supply of the file sheet 2 (bag 4) and automatic insertion sheet 6.

Therefore, the present invention is configured as a means, that is, stock means for placing stacked sheets, feeding means for feeding one sheet of the lowermost layer from the stock means, and upper layer during the feeding. Holding means for holding the sheet laminated body of a part, and conveyor means for conveying the fed-out sheet addressed to one sheet, and the feeding means constitutes a feeding body which can advance and retreat toward the conveyor, and A concave portion is formed on the upper surface of the front end of the feeding body facing, and a suction port for drawing in and adsorbing the lowermost sheet is opened in the concave portion,
The lowermost sheet is adsorbed in the concave portion, and the advancing / retreating drive means is provided for advancing the feeding member and then retracting it.
The holding means includes a claw part that can advance and retreat between the lowermost sheet adsorbed in the recess and the upper layer sheet laminate, and a holding part that interferes with the front edge of the upper layer sheet laminate, The holding drive means is provided for advancing the pawl portion during the feeding operation in which the lowermost sheet is adsorbed in the concave portion and advancing the feeding body, while retracting the pawl portion after the feeding of the sheet for one sheet is completed. In point.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1B, the apparatus as a whole has a bag supply station 20 for supplying one file sheet 2 (bag 4) and a work station for receiving the supplied file sheet 2. 40, and an insert supply station 6 for inserting an insert sheet 6 (insert) into the file sheet 2 waiting at the work station 40.
It is composed of 0 and 0. The sheet feeding apparatus according to the present invention is implemented in the bag feeding station 20 and the insert feeding station 60.

(Structure of Bag Supply Station) As shown in FIGS. 2 to 4, the bag supply station 20 has a stock means 21 on which the laminated file sheets 2 (bags 4) are placed, and the stock means 21. From the lowermost layer, the feeding means 22 for feeding out one sheet 2 for the file, and the layered body 2a of the sheet for the upper layer during the feeding (the layered body 4 of the bag).
It is composed of a holding means 23 for holding a) and a conveyor means 24 for carrying the delivered one-sided bag 4.

The feeding means 22 constitutes a feeding body 25 which can advance and retreat toward the conveyor 24. A concave portion 26 is formed on the upper surface of the front end of the feeding body 25 facing the conveyor 24, and the lowermost layer file is formed in the concave portion 26. A suction port 27 for pulling in and adsorbing the sheet 2 is opened in the recess 26, and an advancing / retreating drive of a cylinder or the like for advancing the feeding body 22 in the state where the lowermost file sheet 2 is adsorbed in the recess 26 and then retracting it. Means 28 are provided.

The stocking means 21 is provided with a support base 29 disposed adjacent to the rear end of the feeding means 22, and the support base 29 is composed of a plurality of division bases 29a arranged in a row at intervals. A large number of air ejection ports 29b are provided on the upper surface of each of the division tables 29a. A guide plate 30 having an L-shaped cross section is arranged on both sides of the feeding body 25, and the feeding body 25, the guide plate 30, and the support 29 allow
The stock means 21 for mounting the stack of file sheets is configured.

The holding means 23 is provided with a claw portion 31 that can be moved back and forth between the lowermost file sheet 2 adsorbed in the recess 26 and the upper layer file sheet laminate 2a, and an upper file portion. A rod having a holding portion 32 that interferes with the front edge of the sheet laminated body 2a is configured, and as will be described later,
The lowermost file sheet 2 is sucked into the concave portion 26 and the feeding body 25 is moved forward. During the feeding operation, the claw portion 31 is moved forward, and after the feeding of the file sheet 2 for one sheet is finished, the claw portion 31 is moved backward. A holding drive means 33 such as a cylinder is provided.

The conveyor means 24 includes a lower belt conveyor 34 and an upper belt conveyor 35 which are divided into a plurality of rows.
The lower belt conveyor 34 extends so as to come close to the feeding body 25. An idle roller 36 is disposed in the vicinity of the extending end of the lower belt conveyor 34 so as to be able to come into contact with and separate from it, and is provided with a roller driving means 37 such as a cylinder for driving the idle roller 36 to move back and forth in the contacting and separating direction.

In the case of the illustrated example, the lower belt conveyor 34 and the upper belt conveyor 35, which are a set, are provided in three rows at intervals in the width direction, and the feeding body is provided between the two rows on both sides. 25 moves back and forth. Therefore, the feeding body 2
No. 5 is provided with a notch 38 for preventing the interference with the extending end of the central lower belt conveyor 34 in order to allow the front end edge of the feeding body 25 to enter the row interval of the conveyors when moving forward.

An air jet nozzle 39 facing the recess 26 is provided from the front of the feeding body 25.

(Operation of Bag Supply Station) A large number of file sheets 2 are stacked on the stock means 21, and the sheet 2 is placed with its front edge in the feeding direction aligned with the front edge of the feeding body 25. It

First, as shown in FIG. 4 (A), the feeding body 2
When the suction port 27 opened in the recess 26 of No. 5 sucks air by a vacuum means (not shown), the lowermost file sheet 2 is drawn into the recess 26 to be sucked. At the same time, the air blown out from the air blowout nozzle 39 forms a gap S between the lowermost layer file sheet 2 and the upper layer file sheet laminate 2a at least in the portion where it is sucked into the recess 26. To do.

Therefore, by the holding and driving means 33, as shown in FIG.
As shown by the chain line in (A), the claw portion 31 of the holding means 23 is advanced and enters the gap S. In the case of the example,
At the same time, the holding portion 32 moves forward to face and interfere with the front end edge of the upper layer sheet stack 2a for a file, thereby completing the feeding preparation of the lowermost bag 4.

Next, as shown in FIG. 4 (B), the feeding / retracting drive means 28 advances the feeding body 25. At this time, air is ejected from the air ejection port 29b of the support base 29, and acts so as to lift the lowermost file sheet 2 upward. Therefore, the lowermost file sheet 2 advances along with the feeding body 25 in a state where the front end portion is adsorbed by the concave portion 26, while the upper layer file sheet laminated body 2a has the claws of the holding means 23. Since it is held by the portion 31 and the holding portion 32, it is kept on standby on the stock means 21.

As shown in FIG. 4 (B), the feeding body 25 is
Since the notch 38 is advanced to a position for receiving the extended end of the lower belt conveyor 34, the front end edge of the delivered bag 4 is positioned on the lower belt conveyor 34. Therefore, the roller driving means 37 is used to drive the roller shown in FIG.
When the idle roller 36 is advanced and the front edge of the file sheet 2 is sandwiched between the idle roller 36 and the lower belt conveyor 34, as shown by the chain line in FIG. It is pressed and moves forward vigorously, and thereafter it is sent to the next work station 40 in a state where it is sandwiched by the lower belt conveyor 34 and the upper belt conveyor 35 and held in the posture. The idle roller 36 is used for the file sheet 2
When it is attached to the front end edge of the
It is preferable that the air suction is stopped, but the file sheet 2 will not be sucked in even if the air suction state is maintained.
Is separated from and transported.

When the above-mentioned feeding operation for one sheet is completed, the feeding body 25 retreats and returns to the original position, and then the claw portion 31 of the holding means 23 also retreats to the original position. I can be returned. At this time, the air ejection port 2 of the support 29
Since the laminated body 2a is caused to act in the lifting direction by 9b, the next reversing return of the feeding body 25 does not cause wrinkles in the next file sheet. After that, the next file sheet 2 is continuously attracted to the recess 26,
The above operation is repeated.

(Construction of Working Station) The working station 40 is arranged at the end portion of the lower belt conveyor 34 extending from the conveyor means 24 of the bag feeding station 20, as shown in FIGS. A conveyor means 64 of an insert supply station 60, which will be described later, extends from the work station 40 in a direction intersecting the lower belt conveyor 34. Therefore, the filing sheet 2 supplied from the supply station 20 has the opening 5 in the horizontal direction, and in the state of being sent to the work station 40, the filing sheet 2 has a posture so as to move the opening 5 toward the insert supply station 60. It is set.

Between the lower belt conveyors 34 arranged in the width direction, a divided bed 41 is divided into a plurality of rows.
Lifting bed 4 consisting of a, 41b and 41c (see FIG. 7)
1 is arranged, and the lifting bed 41 is lifted and lowered between the lower position and the upper position of the transport surface L of the lower belt conveyor 34 via the cylinder rod 42. A large number of air suction ports 43 are provided on the upper surface of each lifting bed 41, and the air inside the lifting bed 41 can be sucked by suction means (not shown).

A spreading means 44 is arranged above the lifting bed 41. The spreading means 44 has an air suction nozzle 45 provided on the periphery thereof facing downward, and a receiving plate 46 at the center. Is provided and can be moved up and down via the cylinder rod 47. That is, the lower surface of the receiving plate 46 and the lower end of the air suction nozzle 45 are positioned in the same plane, and the plane is moved up and down so as to move vertically between a position near the upper side of the transport surface L and a position further above. .

As shown in FIG. 7, the conveying surface of the conveyor means 64 (lower belt conveyor 74) extended from the insert supply station 60 extends so as to be at the same level as the upper surface of the lifting bed 41 in the raised position. A connecting plate 48 is provided between the end of the conveyor means 64 and the lifting bed 41, and an auxiliary roller 49 that is driven to rotate is provided on the upper surface of the connecting plate 48. An air ejection nozzle 50 is arranged from the vicinity of the communication plate 48 toward the ascending / descending bed 41.

(Operation of Working Station) As described above, when the one-file filing sheet 2 fed from the bag feeding station 20 is sent to the working station 40 by the lower belt conveyor 34 of the conveyor means 24, it is not shown. The position detecting means such as the limit switch and the photoelectric tube switch actuate, and as shown in FIGS. 6 (A) and 7 (A), the lift bed 41 is raised. At this time, the file sheet 2 is attached to the air suction port 4 of the lifting bed 41.
3 as well as being lifted upward away from the transport surface of the lower belt conveyor 34, the lifting bed 4
1 is stopped and held.

As shown in FIG. 7 (A), since air is jetted from the air jet nozzle 50, the lifting bed 4
The file sheet 2 on 1 is expanded by receiving air in the opening 5.

At the same time, the upper portion of the file sheet 2 is sucked by the air suction nozzle 45 of the expanding means 44, and the central portion is along the receiving plate 46. Therefore, as shown in FIGS. 6 (B) and 7 (B), the expanding means 44 is raised to expand the bag 4 forming the file sheet 2.

When the expansion preparation work is completed, the insert sheet 6 is sent from the insert supply station 60, which will be described later, and placed in the file sheet 2 (bag 4). That is,
When the insertion sheet 6 sent from the insert supply station 60 by the conveyor means 64 is thrown onto the connecting plate 48, the driving force of the auxiliary roller 49 allows the insertion sheet 6 to enter the file sheet 2 (bag 4) without reducing the momentum. It is thrown in.

When the insertion work of the insertion sheet 6 is completed in this way, the expanding means 44 is lowered and the lift bed 41 is lowered. The file sheet 2 into which the insertion sheet 6 is inserted is brought into contact with the lower belt conveyor 34 as soon as it reaches the carrying surface L of the conveyor means 24, and is sent to the sending station 80 of FIG. At this time, the air suction nozzle 45 of the expanding means 44 is
It is preferable to stop the air suction. The air suction port 43 of the lift bed 41 may stop the air suction, but even when the air suction is continued, when the lift bed 41 is lowered, the file sheet 2 is transferred to the lower belt conveyor 34. Abut on the transport surface, and lift bed 4 there
Since it is separated from the first air suction port 43, it does not matter.

When the above work is completed, the process waits to receive the next file sheet 2 supplied from the bag supply station 20, and thereafter, the above operation is repeated.

(Structure of Insert Supply Station) As shown in FIG. 6, the insert supply station 60 includes stock means 61 on which the stacked insert sheets 6 are placed, and the bottom insert sheet from the stock means 61. 6, a feeding means 62 for feeding one sheet, a holding means 63 for holding a stack of the insertion sheets in the upper layer portion during the feeding, and a conveyor means 64 for conveying the fed one sheet 6 for insertion. Consists of.

The feeding means 62 constitutes a feeding body 65 which can advance and retreat toward the conveyor 64, forms a recess 66 on the upper surface of the front end of the feeding body 65 facing the conveyor 64, and inserts the lowest layer into the recess 66. A suction port 67 for drawing in and adsorbing the sheet 6 is opened in the concave portion 66, and an advancing / retreating driving means 68 such as a cylinder for advancing the feeding body 62 and then retracting it while the lowermost insertion sheet 6 is adsorbed in the concave portion 66. Equipped with.

The stock means 61 is provided with a support base 69 disposed adjacent to the rear end of the feeding means 62, and the support base 69 is composed of a plurality of division bases 69a arranged in a row at intervals. A large number of air ejection ports 69b are provided on the upper surface of each of the division tables 69a. A guide plate 70 having an L-shaped cross section is arranged on both sides of the feeding body 65, and constitutes a stock means 61 for placing the stack of the insertion sheets 6 on the upper surfaces of the feeding body 65 and the support base 69.

The holding means 63 is provided with a claw portion 71 that can be moved back and forth between the lowermost insertion sheet 6 and the upper insertion sheet stack adsorbed in the recess 66, and the upper insertion sheet stack. A rod having a holding portion 72 that interferes with the front end edge is configured, and as will be described later, the claw portion 71 is advanced during the feeding operation of adsorbing the lowermost layer insertion sheet 6 to the recess 66 and advancing the feeding body 65, A holding drive means 73 such as a cylinder is provided for retracting the claw portion 71 after feeding out the insertion sheet 6 addressed to one sheet.

The conveyor means 64 includes a lower belt conveyor 74 and an upper belt conveyor 75 divided into a plurality of rows.
The lower belt conveyor 74 extends so as to come close to the feeding body 65. An idle roller 76 is disposed in the vicinity of the extending end of the lower belt conveyor 74 so as to be able to come into contact with and separate from it, and is provided with a roller driving means 77 such as a cylinder that drives the idle roller 76 to move forward and backward in the contacting and separating direction.

In the case of the illustrated example, the lower belt conveyor 74 and the upper belt conveyor 75, which are a set, are provided in two rows at intervals in the width direction.
The feeding body 65 moves forward and backward toward the extended end of No. 4. Therefore, the feeding body 65 is provided with notches 78 and 78 for preventing the front end edge of the feeding body 65 from interfering with the extending ends of the two rows of the lower belt conveyors 74 during forward movement.

Although not shown in the drawing, an air jet nozzle facing the concave portion 66 from the front of the feeding body 65 is provided.

(Operation of Insert Supply Station) The operation of supplying the insert sheet 6 for one sheet by the insert supply station 60 is substantially the same as the operation for supplying the bag 4 for one sheet by the bag supply station 20 described above. Therefore, it is not shown.

First, a large number of insertion sheets 6 are stacked on the stock means 61, and the stacking body is placed with its front edge in the feeding direction aligned with the front edge of the feeding body 65.

When the suction means 67 opened in the concave portion 66 of the feeding body 65 sucks the air by the vacuum means,
The insertion sheet 6 of the lowermost layer is drawn into the concave portion 66 and adsorbed. At the same time, the lowermost insertion sheet 6 is ejected from the air ejection nozzles that are arranged toward the recesses 66, so that at least the portion where the insertion sheets 6 are attracted to the recesses 66, the insertion sheet stack 6a in the upper layer portion. To form a gap.

Then, the holding drive means 73 advances the claw portion 71 of the holding means 63 to enter the gap between the lowermost insertion sheet 6 and the upper insertion sheet stack 6a. At the same time, the holding portion 72 moves forward to face and interfere with the front end edge of the insert sheet stack of the upper layer portion, whereby the feeding preparation of the insert sheet 6 of the lowermost layer is completed.

Then, the advancing / retreating driving means 68 is used to move the feeding member 6
5 is advanced. At this time, the air is ejected from the air ejection port 69b of the support base 69, and acts so as to lift the lowermost insertion sheet 6 upward. Therefore, the insertion sheet 6 of the lowermost layer has a concave portion 66 in the vicinity of the front end.
While advancing along with the feeding body 65 in a state of being adsorbed by the sheet feeding means, the insertion sheet stack body 6a of the upper layer portion is held by the claw portions 71 and the holding portion 72 of the holding means 63. It has been kept waiting.

The feeding body 65 is advanced to the position where the notch 78 receives the extended end of the lower belt conveyor 74, so that the front edge of the fed insertion sheet 6 is positioned above the lower belt conveyor 74. To be Therefore, the idle roller 76 is advanced by the roller driving means 77, and the front edge of the insertion sheet 6 is moved to the idle roller 76.
When sandwiched between the lower belt conveyor 74 and the lower belt conveyor 74, the insertion sheet 6 is pressed against the lower belt conveyor 74 and vigorously advances, and thereafter, the inserted sheet 6 is sandwiched by the lower belt conveyor 74 and the upper belt conveyor 75 to maintain the posture. In the state, as shown in FIG. 5, it is sent to the work station 40. When the idle roller 76 is brought into contact with the front edge of the insertion sheet 6, it is preferable that the suction port 67 of the concave portion 66 stop sucking air. It is conveyed away from the suction port 67.

When the feeding operation for one insertion sheet is completed, the feeding body 65 retracts and returns to the original position, and then the claw portion 71 of the holding means 63 also retracts to the original position. Be returned to. At this time, since the stack 6a of the insertion sheet is actuated in the lifting direction by the air ejection port 69b of the support base 69, wrinkling of the next insertion sheet does not occur due to the backward movement of the feeding body 65. After that, subsequently, the next insertion sheet 6 is attracted to the recess 66, and the above operation is repeated.

(Structure of File Sheet and Insert Sheet) In the illustrated embodiment, the file sheet 2 is A3 size.
As shown in FIG. 1 (B), the left and right page portions of A4 size etc. which are formed into a large size and are widened as shown in FIG. The two insertion sheets 6 and 6 are inserted in parallel to the filing sheet 2. Therefore, although not shown, the insert supply stations 60, 60
Are configured as a pair of left and right side by side.

However, in the present invention, the file sheet 2 is formed in a small size such as A4 size so as to correspond to one page each on the left and right, and one sheet of the file sheet 2 is replaced by the insert sheet 6. Of course, it is free to configure so that only one sheet is inserted.

[0050]

According to the present invention, for example, the file sheet 2 is supplied from the bag supply station 20 and the insert sheet 6 is supplied from the insert supply station 60 while the work station 40 is on standby. In the continuous operation of inserting the insertion sheet 6 into the file sheet 2, the bag supply station 20 and the insert supply station 60 can be automated, and the work efficiency is improved, and as a result, the product unit cost is reduced. It becomes possible to do.

In particular, according to the present invention, the lowermost sheet 2 or 6 is fed into the concave portion 2 of the feeding body 25 or 65 when feeding out one sheet from the laminated body of stacked sheets.
6 and 66 are drawn and attracted to form a gap S between the upper layer sheet laminates 2a and 6a, and the claw portions 31 and 71 of the holding means 23 and 63 are inserted into the gap S, and the upper layer portion With the front end edges of the sheet laminated bodies 2a and 6a of FIG.
Since the sheets 5 and 26 are advanced so that the sheets 2 and 6 addressed to one sheet are advanced, it is possible to feed and supply the sheet addressed to one sheet in a short time. That is, when using a finger mechanism or the like which is conventionally used in various mechanical devices,
Rather than a linear reciprocating motion of the finger, for example, a complicated operation such as raising the finger while adsorbing it to the object to be fed and subsequently moving the finger forward and then lowering it on the conveyor is performed. Since it is necessary, the time required for one cycle for feeding out becomes long, whereas the present invention significantly shortens the working time and improves the efficiency of work processing within a predetermined time. This has the effect of enabling large-scale processing.

[Brief description of drawings]

FIG. 1 is a schematic view of the present invention, (A) is a perspective view showing a file book as an example to which the present invention is applied, and (B) is an arrangement of stations in one embodiment of the present invention. FIG.

FIG. 2 is a perspective view showing an embodiment in which the sheet supply device of the present invention is applied to a bag supply station.

FIG. 3 is a vertical sectional side view of the sheet feeding device according to the embodiment.

FIG. 4 shows the operation of the sheet feeding device,
(A) is a vertical sectional side view showing a bag supply preparation state, and (B) is a vertical sectional side view showing a bag supply state.

FIG. 5 is a vertical sectional side view showing a work station installed in combination with the embodiment of the present invention.

FIG. 6 is a vertical sectional front view showing the operation of the work station.

FIG. 7 is a vertical sectional side view showing the operation of the work station.

FIG. 8 is a perspective view showing an embodiment in which the sheet supply device of the present invention is applied to an insert supply station.

[Explanation of symbols]

 2 File sheet 4 Bag 6 Inserted sheet 20 Bag feeding station (sheet feeding device) 21 Stock means 22 Feeding means 23 Holding means 24 Conveyor means 25 Feeding body 26 Recess 27 Suction port 28 Advance / retreat driving means 29 Support base 31 Claw portion 32 Hold Part 33 Holding Drive Means 36 Idle Roller 37 Roller Drive Means 38 Notch 40 Work Station 41 Lifting Bed 43 Air Suction Port 44 Spreading Means 45 Air Suction Nozzle 46 Receiving Plate 48 Communication Plate 49 Auxiliary Roller 60 Insert Insert Supply Station (Sheet Supply) 61) Stocking means 62 Feeding means 63 Holding means 64 Conveyor means 65 Feeding body 66 Recessed portion 67 Suction port 68 Forward / backward driving means 69 Support base 71 Claws 72 Holding portion 73 Holding driving means 76 Idle roller 77 Roller driving means 78 Notch Part 80 Sending station 81 Shoot

Claims (1)

[Claims] 1. A stocking means for placing stacked sheets, a feeding means for feeding out one sheet of the lowermost layer from the stocking means, and a holding means for holding an upper layered sheet laminate during the feeding out. And a conveyor means for conveying the delivered sheet for one sheet. The delivery means constitutes a delivery body that can advance and retreat toward the conveyor, and forms a recess on the front end upper surface of the delivery body facing the conveyor. Along with that, it is formed by opening a suction port for pulling and adsorbing the lowermost layer sheet in the concave portion, and is provided with advancing / retreating drive means for advancing the feeding body in a state in which the lowermost layer sheet is adsorbed in the concave portion and then retracting it. The holding means includes a claw part that can advance and retreat between the lowermost sheet adsorbed in the recess and the upper layer sheet laminate, and a holding part that interferes with the front edge of the upper layer sheet laminate, Bottom layer A holding drive means is provided for advancing the pawl portion during the feeding operation in which the sheet is adsorbed in the concave portion and advancing the feeding body, while retracting the pawl portion after the feeding of the sheet for one sheet is completed. Sheet feeding device.