Sheet feeder

Abstract

To uniformize blank spaces of sheets placed on containers, between the containers by placing the sheets onto bottom face outer edge parts of the containers.SOLUTION: According to a sheet feeder 1 for placing a sheet 3a inside a tiered box 2 whose one side is opened in a tightly attached state, a first unit 6 and a second unit 7 are arranged at facing positions across the tiered box 2. The first unit 6 and the second unit 7 each arranged to be spaced apart at predetermined intervals in a plane direction comprise first to third sheet holding parts 61 to 63 and fourth to sixth sheet holding parts 71 to 73, that planarly hold the sheet 3a. The sheet holding parts 61 to 63, and 71 to 73 form looseness SL11, SL12, SL21, SL22 to the sheet 3a by narrowing a gap in a crossing direction to a separation direction of the first unit 6 and the second unit 7.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a sheet supplying device for laying a sheet on the inside of a container having an opening on one side. [Background technology]

[0002] For example, in school lunch and lunch box manufacturing factories, cooked rice is stored in a box with a sheet between them. If cooked rice is directly placed in the box, the cooked rice will stick to the inner wall of the box, making cleaning the box a time-consuming process. Also, if the inner wall of the box is scratched, bacteria will grow in the scratched area, making the box unable to store cooked rice hygienically. Various devices for laying a sheet on the inside of a container that opens on one side have been proposed in the past.

[0003] For example, Patent Document 1 discloses a device in which a gripping means pulls a sheet from a sheet roll above a food box, and then a clamp suspended from a chain is placed on top of the pulled-out sheet with the chain in a slack state; the sheet is then cut and the gripping means is released at the same time, thereby lowering the clamp by the amount of slack in the chain and pushing the sheet inside the food box.

[0004] For example, Patent Document 2 discloses a device in which a pull-out arm adsorbs the end of a sheet roll and pulls out a predetermined length of sheet, and once the rear end of the sheet is clamped by a pressure member, the sheet is cut, and then the pull-out arm moves to place the cut sheet on top of a container, after which the sheet is released, and then a suction pad is lowered onto the sheet placed on the container, thereby laying the sheet inside the container. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-164920 [Patent Document 2] Japanese Patent Application Publication No. 3-176322 Summary of the Invention [Problem to be solved by the invention]

[0006] When laying a sheet on a container, it is desirable to lay the sheet tightly around the outer edge of the bottom of the container in order to increase the container's storage efficiency. It is also desirable to make the margins of the sheet uniform between containers so that they do not have adverse effects on subsequent processes, such as getting caught when transporting the container with the sheet laid on it or not being able to properly wrap the contents.

[0007] The device described in Patent Document 1 cuts the sheet while tension is applied to the sheet by placing a clamp on the sheet. As a result, the clamp falls and the sheet becomes taut while being pushed into the box, and the sheet cannot be laid down to the four corners of the box. In addition, the device described in Patent Document 1 has a problem that the positional relationship between the sheet and the box varies depending on the degree of tension applied to the sheet and the timing when the gripping means releases the sheet, making it difficult to make the sheet margins uniform between the box stacks.

[0008] The device described in Patent Document 2 uses a suction cup to push a sheet placed on a container into the container, and the sheet can shift position relative to the container while being pushed into the container. As a result, the sheet cannot be laid all the way to the outer edge of the bottom of the container, and the margins of the sheet laid on the containers are not uniform between the containers.

[0009] Therefore, there was room for improvement in the sheet supplying device that lays a sheet on the inside of a container, as it was not possible to lay the sheet all the way to the outer edge of the bottom of the container or to make the margins of the sheet uniform between containers.

[0010] The technology disclosed in this specification has been made to solve the above-mentioned problems, and aims to provide a technology in a sheet supplying device that lays a sheet on the inside of a container, which makes it easy to lay the sheet all the way to the outer edge of the bottom of the container and makes the margins of the sheet laid on the container uniform between containers. [Means for solving the problem]

[0011] One aspect of the technology disclosed in this specification is characterized in that (1) a sheet supplying device that lays a sheet in a tightly attached state inside a container that opens on one side, the device having a pushing section that is inserted into the opening of the container and pushes the sheet into the container, and a first unit and a second unit that are positioned opposite each other across the container and hold the sheet between the container and the pushing section, the first unit and the second unit each having a plurality of sheet holding sections that hold the sheet in a flat state and that narrow the spacing between the plurality of sheet holding sections that hold the sheet in a flat state in a direction intersecting the direction of separation between the first unit and the second unit to form slack in the sheet.

[0012] In the sheet supplying device having the above configuration, the first unit and the second unit are disposed at positions facing each other with the container in between, and the multiple sheet holding parts of the first unit and the multiple sheet holding parts of the second unit are disposed between the container and the pushing part with the sheet spread out flat. The spacing between the multiple sheet holding parts of the first unit and the multiple sheet holding parts of the second unit are narrowed in a direction intersecting the direction of separation between the first unit and the second unit, respectively, so that the sheet is pulled in a direction intersecting the direction of separation between the first unit and the second unit on both sides of the container, forming slack. As a result, slack is also formed in the sheet in a portion corresponding to the container. The pushing part pushes the sheet into the container while expanding the slack in the sheet, so that the sheet does not become taut halfway as it is pushed into the container, and the sheet can be easily laid down up to the outer edge of the bottom surface of the container. Furthermore, for example, even if there is a discrepancy in the timing at which the sheet leaves the multiple sheet holding portions of the first unit and the second unit when the pushing portion pushes the sheet into a container, the discrepancy is absorbed by the slack in the sheet, so that the margins of the sheet pushed into the containers by the pushing portion can be made uniform between the containers.

[0013] (2) In the sheet feeding device described in (1), it is preferable that the plurality of sheet holding portions of the first unit and the plurality of sheet holding portions of the second unit hold one side of the sheet.

[0014] In the sheet feeder having the above configuration, the sheet is less likely to get caught in the multiple sheet holding parts of the first unit or the multiple sheet holding parts of the second unit, and the multiple sheet holding parts of the first unit and the multiple sheet members of the second unit can stably hold the sheet. For example, the multiple sheet holding parts are configured with Bernoulli chucks, making it possible to hold one side of the sheet.

[0015] (3) In the sheet supplying device described in (1) or (2), it is preferable that the container has a rectangular parallelepiped shape, and the first sheet holding portion and the second sheet holding portion included in the plurality of sheet holding portions of the first unit, and the third sheet holding portion and the fourth sheet holding portion included in the plurality of sheet holding portions of the second unit are each positioned at positions corresponding to corners of the container and hold the sheet in a flat state.

[0016] In the sheet supplying device having the above-mentioned configuration, the slacks formed on both sides of the container are located between adjacent corners of the container, so that the sheet can be laid down to all four corners of the container.

[0017] (4) In the sheet supplying device described in any one of (1) to (3), it is preferable that the container has a rectangular shape having a pair of long sides and a pair of short sides, the multiple sheet holding parts of the first unit are arranged on the side of one of the short sides with the spacing narrowed along the short side direction, and the multiple sheet holding parts of the second unit are arranged on the side of the other short side with the spacing narrowed along the short side direction.

[0018] In the sheet supplying device having the above configuration, the multiple sheet holding parts of the first unit and the multiple sheet holding parts of the second unit form slack in the sheet on both sides of the long side of the container, so that slack is also formed in the sheet along the long side in the portion corresponding to the container, making it easier to push the sheet into the container using the pushing part. This makes it difficult for the sheet to shift position while the pushing part is pushing the sheet into the food container, and makes it possible to make the margins of the sheet pushed into the container by the pushing part uniform between the containers.

[0019] (5) In the sheet supplying device described in any one of (1) to (4), it is preferable that the multiple sheet holding parts of the first unit include a first fixed sheet holding part arranged immovably, a first movable sheet holding part and a second movable sheet holding part arranged on both sides of the first fixed sheet holding part along the container and movable in a planar direction toward the first fixed sheet holding part, and the multiple sheet holding parts of the second unit include a second fixed sheet holding part arranged immovably, a third movable sheet holding part and a fourth movable sheet holding part arranged on both sides of the second fixed sheet holding part along the container and movable in a planar direction toward the second fixed sheet holding part.

[0020] In the sheet supplying device having the above configuration, the first movable sheet holding part and the second movable sheet holding part move toward the first fixed sheet holding part, thereby forming slack on both sides of the first fixed sheet holding part with the first fixed sheet holding part as a base point. Also, the third movable sheet holding part and the fourth movable sheet holding part move toward the second fixed sheet holding part, thereby forming slack on both sides of the second fixed sheet holding part with the second fixed sheet holding part as a base point. Thus, with the sheet supplying device having the above configuration, slack in the sheet can be stably formed on both sides of the container. Effect of the Invention

[0021] According to the above configuration, in a sheet supplying device that lays a sheet on the inside of a container, a technology can be realized that makes it easy to lay the sheet up to the outer edge of the bottom of the container and makes the margins of the sheet laid on the container uniform between containers. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a schematic configuration diagram of a sheet feeding device as seen from the front. [Diagram 2] 2 is a cross-sectional view taken along line AA of the schematic configuration diagram of the sheet feeding device shown in FIG. [Diagram 3] FIG. 1 is a diagram showing an example of a food container. [Figure 4] FIG. 2 is a schematic diagram showing an example of a pressing frame. [Diagram 5] FIG. 2 is a schematic configuration diagram of a first and second unit as viewed from above. [Figure 6] FIG. 2 is a schematic configuration diagram of a first and second unit as viewed from above. [Figure 7] 5A and 5B are diagrams illustrating a processing procedure of a sheet supplying device. [Figure 8] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 9] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 10] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 11] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 12] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 13] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 14] 5A to 5C are diagrams illustrating the operation of the sheet supplying device. [Figure 15] 13A and 13B are diagrams illustrating modified examples of a plurality of sheet holding portions. [Figure 16] 13A and 13B are diagrams illustrating modified examples of a plurality of sheet holding portions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present specification discloses a sheet supplying device for laying a sheet on the inside of a food container in which cooked rice is packed.

[0024] FIG. 1 is a schematic diagram of the sheet supplying device 1 as viewed from the front. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. Note that the up / down, front / rear, and left / right directions indicated by arrows in the figure indicate the orientations relative to the sheet supplying device 1. The sheet supplying device 1 is configured such that, with a sheet 3a disposed between a food container 2 and a pushing frame 4, the food container 2 is lifted relative to the pushing frame 4, whereby the pushing frame 4 pushes the sheet 3a into the food container 2, and the sheet 3a is laid down in close contact with the inside of the food container 2. In this embodiment, the pushing frame 4 is an example of a pushing section. In this embodiment, the food container 2 is an example of a container.

[0025] FIG. 3 is an external perspective view showing an example of the food container 2. FIG. 3(a) shows the state before the cooked rice R is wrapped in the sheet 3a, and FIG. 3(b) shows the state after the cooked rice R is wrapped in the sheet 3a. In the food container 2 of this embodiment, a pair of long side side portions 2a, 2b and a pair of short side side portions 2c, 2d are arranged opposite each other along the outer edge of the rectangular bottom portion 2e (see FIG. 1 and FIG. 2). As shown in FIG. 3(a), the sheet supplying device 1 lays the sheet 3a on the food container 2 in a state in which margins 3aa, 3ab are provided in the portions corresponding to the pair of long side side portions 2a, 2b, and margins 3ac, 3ad are provided in the portions corresponding to the pair of short side side portions 2c, 2d. The margins 3aa, 3ab, 3ac, 3ad refer to the portions of the sheet 3a laid on the food container 2 that are located outside the opening end of the food container 2. As shown in FIG. 3(b), the blanks 3aa, 3ab, 3ac, and 3ad are used to wrap the cooked rice R.

[0026] As shown in FIGS. 1 and 2, the sheet supplying device 1 includes a conveyor 11, a push-in frame 4, a drawer 5, a first unit 6, a second unit 7, and a lifter 9. The sheet supplying device 1 includes a conveyor 11, a push-in frame 4, a drawer 5, a first unit 6, a second unit 7, and a lifter 9.

[0027] As shown in FIG. 1, the conveyor 11 has a pair of conveyor belts 14A, 14B (see FIG. 2) wound around a driven roller 12 and a driving roller 13, and conveys the food container 2 from rear to front. The conveyor 11 has a first stopper 15, a second stopper 16, a third stopper 17, and a fourth stopper 18 arranged along the conveying direction D1 of the food container 2. The first to fourth stoppers 15 to 18 are arranged so as to be displaceable in the vertical direction in the figure. The first to fourth stoppers 15 to 18 restrict the movement of the food container 2 by protruding above the conveying surface of the conveyor 11, and allow the movement of the food container 2 by retreating below the conveying surface of the conveyor 11.

[0028] The first stopper 15 is disposed at an input position P1 where the food container 2 is input into the sheet supplying device 1. The second stopper 16 is disposed at a spraying position P2 where the spray nozzle 10 sprays alcohol onto the food container 2. The third stopper 17 is disposed at a lifting position P3 where the food container 2 is loaded onto and unloaded from the lifter 9. The fourth stopper 18 is disposed at an unloading position P4 where the food container 2 is unloaded from the sheet supplying device 1. The operations of the first to fourth stoppers 15 to 18 are individually controlled.

[0029] A lifter 9 is disposed at the lift position P3 for moving the food container 2 up and down while holding it in position. A push-in frame 4 is disposed above the lift position P3. As shown in FIG. 2, the lifter 9 can lift the food container 2 and insert the push-in frame 4 into the opening 2f of the food container 2.

[0030] FIG. 4 is a schematic diagram showing an example of the pushing frame 4. The pushing frame 4 includes an insertion section 41, a folding section 42, and a fan 45. The insertion section 41 is provided in a shape corresponding to the internal shape of the food box 2, and is inserted into the opening 2f of the food box 2. In this embodiment, the insertion section 41 is provided in a rectangular parallelepiped shape. The insertion section 41 is provided so that, when inserted into the food box 2, a gap S1 is formed between the insertion section 41 and the long side surface portions 2a, 2b and the short side surface portions 2c, 2d of the food box 2, and a gap S2 is formed between the insertion section 41 and the bottom portion 2e of the food box 2.

[0031] The fold-back portion 42 is provided along the outer periphery of the upper end of the insertion portion 41 so that when the insertion portion 41 is inserted into the food container 2 and the sheet 3a is pushed inside the food container 2, the margins 3aa, 3ab, 3ac, and 3ad of the sheet 3a are folded downward along the outer surface of the food container 2 (see FIG. 3(a)). The fold-back portion 42 extends outward from the outer periphery of the upper end of the insertion portion 41, and its tip is bent toward the lower end surface 41d of the insertion portion 41. In other words, the fold-back portion 42 is provided in an L-shape in a cross section when the pushing frame 4 is cut vertically. The pushing frame 4 is formed with an edge engagement groove 43 that engages with the open end of the food container 2 opening downward due to a gap formed between the fold-back portion 42 and the insertion portion 41. The pushing frame 4 is pushed into the food container 2 so as to form a gap S3 between the open end of the food container 2 and the inner upper end surface 42b of the fold-back portion 42.

[0032] The inside of the push-in frame 4 is hollow. The fan 45 is attached to the upper end surface 41c of the insertion part 41, and draws air into the inside of the push-in frame 4 (arrow F1 in the figure). A plurality of first air outlets 41b are provided on the lower end surface 41d of the insertion part 41, and the air drawn into the inside of the push-in frame 4 is blown out from the first air outlets 41b (arrow F2 in the figure). The air blown out from the first air outlets 41b flows through the gaps S2 and S1 formed between the food container 2 and the insertion part 41 to the open end of the food container 2 (arrow F3 in the figure). The air flowing through the gaps S1 is discharged to the outside of the food container 2 through the gaps S3 (arrow F4).

[0033] The folded portion 42 is provided with a second air outlet 42e that communicates with the edge engagement groove 43. Air sucked into the inside of the pressing frame 4 is blown downward from the second air outlet 42e into the edge engagement groove 43 (see arrow F5 in the figure). The second air outlet 42e is provided at a position outside the open end of the food container 2 that engages with the edge engagement groove 43, and promotes air flow from the gap S1 to the outside of the food container 2.

[0034] Returning to FIG. 2, the lifter 9 has a holding member 91 that positions and holds the food container 2. In this embodiment, the operation of the lifter 9 is controlled so that the holding member 91 is positioned at a lower limit position P11, an intermediate position P12, and an upper limit position P13. The lower limit position P11 is a position where the holding member 91 is positioned below the conveying surface and does not hold the food container 2. The intermediate position P12 is a position where the food container 2 is lifted up to near the lower surface of the sheet 3a drawn out by the drawer 5. The upper limit position P13 is a position where the pushing frame 4 into the food container 2 is completed.

[0035] As shown in FIG. 2, a sheet roll 3 is disposed to the right of the conveyor 11. The sheet roll 3 is a sheet 3a wound in a roll shape. The sheet 3a is a thin, light, and flexible plastic film. In this embodiment, the material of the sheet 3a is, for example, HDPE (High Density Polyethylene). The sheet roll 3 can be replaced as appropriate depending on the size of the box 2.

[0036] The pull-out unit 5 is disposed to the left of the sheet roll 3, between the pushing frame 4 and the conveyor 11, and is configured to pull out the sheet 3a between the pushing frame 4 and the box 2. That is, the sheet 3a is pulled out in a direction perpendicular to the conveying direction D1 (see FIG. 1) of the box 2. The pull-out unit 5 has a guide roller 51, a sheet presser 52, and a pair of chucks 53A, 53B (see FIG. 1).

[0037] As shown in FIG. 2, the guide roller 51 is disposed above the sheet roll 3, and changes the orientation of the sheet 3a pulled upward from the sheet roll 3 to the left in the figure (toward the pushing frame 4). A sheet presser 52 is disposed to the left of the guide roller 51. The sheet presser 52 can be switched between an ON state in which the sheet 3a is held in the width direction and an OFF state in which the sheet 3a is released from being held. A pair of chucks 53A, 53B are disposed to the left of the sheet presser 52. The pair of chucks 53A, 53B can be switched between a gripping state in which the leading end of the sheet 3a is clamped from above and below and held, and a release state in which the leading end of the sheet 3a is released.

[0038] 5 and 6 are schematic diagrams of the first and second units 6, 7 as viewed from above. Fig. 5 shows the state before slack is formed, and Fig. 6 shows the state after slack is formed. A pair of guide rails 54A, 54B are arranged in parallel along the pull-out direction of the sheet 3a on both sides in the width direction (front-rear direction) of the sheet 3a. A pair of chucks 53A, 53B are slidably held by the pair of guide rails 54A, 54B.

[0039] 2, the pair of chucks 53A, 53B are controlled to perform linear reciprocating motion between a forward position P21 to the left of the food container 2 or the pushing frame 4 and a backward position P22 to the right of the food container 2 or the pushing frame 4. The cutting section 55 is disposed to the left of the backward position P22 and cuts the sheet 3a in the width direction.

[0040] As shown in FIG. 2, the first unit 6 and the second unit 7 are disposed on both the left and right sides of the pressing frame 4.

[0041] As shown in FIG. 5 and FIG. 6, the food container 2 is disposed below the sheet 3a with a pair of long side surface portions 2a, 2b perpendicular to the conveying direction D1. The first unit 6 and the second unit 7 are disposed on both sides of the long side of the food container 2. The first unit 6 includes a first sheet holding portion 61, a second sheet holding portion 62, and a third sheet holding portion 63. The first to third sheet holding portions 61 to 63 are disposed side by side along the short side direction of the food container 2 on one side of the short side surface portion 2c. The second unit 7 includes a fourth sheet holding portion 71, a fifth sheet holding portion 72, and a sixth sheet holding portion 73. The fourth to sixth sheet holding portions 71 to 73 are disposed side by side along the short side direction of the food container 2 on the other side of the short side surface portion 2d.

[0042] The first to sixth sheet holding units 61 to 63, 71 to 73 are configured by Bernoulli chucks. The Bernoulli chuck is a device that forms a vacuum area near the suction surface by ejecting compressed air from a compression nozzle provided on the suction surface, and suctions and holds an object. Therefore, the first to sixth sheet holding units 61 to 63, 71 to 73 can hold the sheet 3a in a hygienic manner.

[0043] 1 and 2, the first to sixth sheet holding parts 61 to 63, 71 to 73 are disposed above the pull-out part 5 so that their suction surfaces are located near the upper surface of the sheet 3a pulled out by the pull-out part 5. This allows the first unit 6 and the second unit 7 to suction and hold the upper surface of the sheet 3a by the first to sixth sheet holding parts 61 to 63, 71 to 73.

[0044] 5, the rectangular box 2 has first to fourth corners 2g, 2h, 2i, and 2j. The first sheet retaining portion 61 and the third sheet retaining portion 63 are disposed at positions corresponding to the first corner 2g and the second corner 2h located at both ends of the short side surface portion 2c, respectively. The second sheet retaining portion 62 is disposed midway between the first corner 2g and the second corner 2h (midway in the short side direction of the short side surface portion 2c).

[0045] As shown in Fig. 6, the first sheet holding portion 61 and the third sheet holding portion 63 are arranged to be movable in a planar direction. In this embodiment, the first sheet holding portion 61 and the third sheet holding portion 63 are arranged to be slidable along the short side direction of the food container 2. On the other hand, the second sheet holding portion 62 is arranged to be immovable. When the first sheet holding portion 61 and the third sheet holding portion 63 slide toward the second sheet holding portion 62, the distance between the first to third sheet holding portions 61 to 63 is narrowed in a direction (the short side direction of the food container 2) perpendicular to the direction in which the first unit 6 and the second unit 7 are separated from each other (the long side direction of the food container 2).

[0046] 5, the fourth sheet retaining portion 71 and the sixth sheet retaining portion 73 are disposed at positions corresponding to the third corner 2i and the fourth corner 2j located at both ends of the short-side side surface portion 2d, respectively. The fifth sheet retaining portion 72 is disposed midway between the third corner 2i and the fourth corner 2j (midway in the short-side direction of the short-side side surface portion 2d).

[0047] As shown in Fig. 6, the fourth to sixth sheet holding parts 71 to 73 are provided in the same manner as the first to third sheet holding parts 61 to 63, such that the gap between them is narrowed by sliding the fourth sheet holding part 71 and the sixth sheet holding part 73 along the short side direction of the food container 2. In the following description, the positions of the first sheet holding part 61, the second sheet holding part 62, the fourth sheet holding part 71, and the sixth sheet holding part 73 shown by dotted lines in Fig. 6 are referred to as "non-pulling positions". The positions of the first sheet holding part 61, the second sheet holding part 62, the fourth sheet holding part 71, and the sixth sheet holding part 73 shown by solid lines in Fig. 6 are referred to as "pulling positions".

[0048] In this embodiment, the first to third sheet holding portions 61 to 63 of the first unit 6 are an example of the multiple sheet holding portions of the first unit. The first sheet holding portion 61 is an example of the first movable sheet holding portion. The third sheet holding portion 63 is an example of the second movable sheet holding portion. The second sheet holding portion 62 is an example of the first fixed sheet holding portion. In this embodiment, the fourth to sixth sheet holding portions 71 to 73 of the second unit 7 are an example of the multiple sheet holding portions of the second unit. The fourth sheet holding portion 71 is an example of the third movable sheet holding portion. The sixth sheet holding portion 73 is an example of the fourth movable sheet holding portion. The fifth sheet holding portion 72 is an example of the second fixed sheet holding portion.

[0049] Incidentally, there are food containers 2 that differ in depth and size of the opening 2f. The holding member 91 of the lifter 9 in this embodiment may be configured so that one member can position multiple types of food containers 2, or it may be configured so that it can be replaced depending on the type of food container 2. In contrast, the pushing frame 4 is preferably provided depending on the type of food container 2, since the sheet 3a is laid in close contact with the inside of the food container 2. The sheet supplying device 1 is capable of replacing the pushing frame 4 depending on the type of food container 2. The replacing of the pushing frame 4 may be performed automatically or manually.

[0050] Next, the operation of the sheet supplying device 1 will be described. Fig. 7 is a diagram for explaining the processing procedure of the sheet supplying device 1. Fig. 7 shows the procedure of the operation performed by the sheet supplying device 1 for one box stack 2. Figs. 8 to 14 are diagrams for explaining the operation of the sheet supplying device 1. Figs. 8 to 12 and 14 are views of the sheet supplying device 1 as viewed from the left. Fig. 13 is a view of the sheet supplying device 1 as viewed from the rear.

[0051] When the power is turned on, the conveyor 11 of the sheet supplying device 1 is driven. When the box 2 is inserted behind the first stopper 15 with the first stopper 15 raised, the sheet supplying device 1 starts the process shown in FIG. 7 for the box 2. In order to shorten the takt time, the sheet supplying device 1 controls the operation of the first to fourth stoppers 15 to 18 individually, and performs operations such as spraying alcohol and pushing the sheet 3a in like an assembly line. However, for the convenience of explanation, the explanation will be given on the premise that the first to fourth stoppers 15 to 18 are raised above the conveying surface of the conveyor 11. The box 2 inserted into the conveyor 11 is abutted against the raised first stopper 15, and is aligned with the insertion position P1 so that the pair of long side surface portions 2a, 2b are perpendicular to the conveying direction D1.

[0052] As shown in Fig. 7, when the first stopper 15 descends (S101), the food container 2 is sent from the input position P1 to the spray position P2 as shown in Fig. 1. As shown in Fig. 7, the first stopper 15 ascends (S102) after the food container 2 is sent from the input position P1. When the food container 2 is stopped by the second stopper 16 and aligned with the spray position P2, the spray nozzle 10 sprays alcohol onto the inner surface of the food container 2 (S103). This disinfects the inner surface of the food container 2 and improves the adhesion of the sheet 3a.

[0053] As shown in Fig. 7, when the second stopper 16 descends (S104), the food container 2 is sent from the spraying position P2 to the lifting position P3 as shown in Fig. 1. As shown in Fig. 7, after the food container 2 is sent from the spraying position P2, the second stopper 16 rises (S105).

[0054] 7, the sheet feeder 1 advances from the retreat position P22 to the advance position P21 in a state where the pair of chucks 53A, 53B grip the leading end of the sheet 3a in parallel with the descent of the second stopper 16 (S201). At this time, the sheet presser 52 shown in FIG. 2 is switched from the ON state to the OFF state to release the hold of the sheet 3a, and the sheet 3a of the sheet roll 3 is pulled out between the push-in frame 4 and the box weight 2 as shown in FIG.

[0055] 7, when the pair of chucks 53A, 53B pulls out the sheet 3a, the first to sixth sheet holding parts 61-63, 71-73 suck and hold the upper surface of the sheet 3a (S202). At this time, the first to sixth sheet holding parts 61-63, 71-73 are in the non-pulling positions. Therefore, the sheet 3a is held by the first to sixth sheet holding parts 61-63, 71-73 in a flat spread state.

[0056] As shown in Fig. 7, when the first to sixth sheet holding units 61 to 63, 71 to 73 hold the sheet 3a, the cutting unit 55 is driven to cut the sheet 3a (S203). Since the sheet 3a is held by the first to sixth sheet holding units 61 to 63, 71 to 73, it does not hang down from the pair of chucks 53A, 53B after cutting. Before the sheet 3a is cut, the sheet presser 52 is switched from the OFF state to the ON state to hold the sheet 3a. Therefore, the sheet 3a is not rewound onto the sheet roll 3 due to the reaction when the sheet 3a is cut.

[0057] As shown in Fig. 7, after the sheet 3a is cut, the pair of chucks 53A, 53B are switched from the gripping state to the release state, and release the leading end of the sheet 3a (S204). The sheet 3a is held by the first to sixth sheet holding parts 61-63, 71-73, which are arranged in the non-pulling positions. Therefore, even after the pair of chucks 53A, 53B releases the sheet 3a, the sheet 3a remains spread out flat and arranged between the box weight 2 and the pressing frame 4, as shown in Fig. 9.

[0058] The pair of chucks 53A, 53B, while remaining in the released state, retreat from the advanced position P21 to the retracted position P22 (S205 in FIG. 7). The pair of chucks 53A, 53B that have retreated to the retracted position P22 are switched from the released state to the gripping state, and hold the leading end of the sheet 3a held by the sheet presser 52 by sandwiching it from above and below.

[0059] As shown in Fig. 7, in parallel with the retreat of the pair of chucks 53A, 53B, the lifter 9 is initially raised (S301). In the initial raising, the holding member 91 is raised from the lower limit position P11 to the intermediate position P12. As a result, as shown in Fig. 9, the box 2 is raised to near the lower surface of the sheet 3a held by the first to sixth sheet holding parts 61-63, 71-73.

[0060] As shown in Fig. 10, the first sheet holding part 61 and the third sheet holding part 63, and the fourth sheet holding part 71 and the sixth sheet holding part 73 each move in the narrower width direction (S206 in Fig. 7). That is, the first sheet holding part 61 and the third sheet holding part 63, and the fourth sheet holding part 71 and the sixth sheet holding part 73 slide along the short side direction of the food container 2 from the non-pulling position shown by the dotted line in Fig. 10 to the pulling position shown by the solid line in Fig. 10.

[0061] At this time, the first to sixth sheet holding parts 61 to 63, 71 to 73 move in the planar direction while sucking the sheet 3a. Therefore, as shown in Figures 6 and 10, slack SL11 is formed between the first sheet holding part 61 and the second sheet holding part 62 on the side of the short side surface part 2c of the food container 2, and slack SL12 is formed between the third sheet holding part 63 and the second sheet holding part 62. Since the second sheet holding part 62 is fixed to the middle of the short side surface part 2c, slack SL11 and SL12 are formed stably.

[0062] 6, the fourth to sixth sheet holding sections 71 to 73 also form slacks SL21 and SL22 in the sheet 3a on the sides of the short-side side surface portion 2d of the food container 2 by sliding the fourth sheet holding section 71 and the sixth sheet holding section 73 from the non-pulling position to the pulling position. Thus, the sheet supplying device 1 can form slacks SL11, SL12, SL21, and SL22 on both sides in the long-side direction of the food container 2 before pushing the sheet 3a into the food container 2. Accordingly, slacks SL31 and SL32 in the sheet 3a are also formed in the position corresponding to the opening 2f of the food container 2.

[0063] 7, before the pushing frame 4 is pushed into the food container 2, the fan 45 is driven (S207). As the fan 45 is driven, the pushing frame 4 sucks in air (arrow F1 in the figure) and blows it out from the first air outlet 41b and the second air outlet 42e (arrows F2 and F5 in the figure) as shown in FIG.

[0064] As shown in FIG. 7, the lifter 9 rises a second time in parallel with the driving of the fan 45. In the second rise, the holding member 91 rises from the intermediate position P12 to the upper limit position P13 (S302). As shown in FIG. 12 and FIG. 13, the food container 2 held by the holding member 91 is lifted together with the sheet 3a, and the insertion portion 41 of the pushing frame 4 is inserted. The open end of the food container 2 is engaged with the edge engagement groove 43 of the pushing frame 4. The sheet 3a is pushed into the inside of the food container 2 by the pushing frame 4. The margins 3aa, 3ab, 3ac, and 3ad of the sheet 3a that are not pushed into the food container 2 are folded downward outside the food container 2 by the folding portion 42 of the pushing frame 4, and creases are formed along the open end of the food container 2.

[0065] When the pushing frame 4 is inserted into the food container 2, the portions of the sheet 3a held by the first to sixth sheet holding parts 61 to 63, 71 to 73 are pulled toward the food container 2. However, the first to sixth sheet holding parts 61 to 63, 71 to 73 create a vacuum region between themselves and the upper surface of the sheet 3a, thereby adsorbing and holding the upper surface of the sheet 3a. Therefore, even if the sheet 3a is pulled toward the food container 2 as the pushing frame 4 is inserted, the sheet 3a can smoothly slide away from the first to sixth sheet holding parts 61 to 63, 71 to 73 due to the tension, and is not damaged.

[0066] When the pushing frame 4 is inserted into the food box 2, the sheet 3a is pushed into the food box 2 while widening the slacks SL11, SL12, SL21, SL22, SL31, and SL32, as shown in Figures 12 and 13. Therefore, the sheet 3a is laid down up to the first to fourth corners 2g, 2h, 2i, and 2j or the outer edge of the bottom 2e of the food box 2 without being pushed up against the inside of the food box 2.

[0067] As shown in Fig. 6, the first and second units 6, 7 pull the sheet 3a along the short side direction of the food container 2, forming slacks SL11, SL12, SL21, and SL22 in the sheet 3a on both sides of the long side direction of the food container 2, thereby forming slacks SL31 and SL32 along the longitudinal direction in the portion corresponding to the food container 2, which makes it easier to push the sheet 3a into the food container 2 using the pushing frame 4 as shown in Fig. 12 and Fig. 13. This makes it difficult for the position of the sheet 3a to shift while the pushing frame 4 is pushing the sheet 3a into the food container 2, and it can be expected that the margins 3aa, 3ab, 3ac, and 3ad of the sheet 3a pushed by the pushing frame 4 will be uniform between the food containers 2.

[0068] The push-in frame 4 is inserted into the food container 2 while blowing out air from the first air outlet 41b. The air flows from a gap S2 formed between the lower end surface 41d of the insertion portion 41 and the bottom 2e of the food container 2 to a gap S1 formed between the outer surface of the insertion portion 41 and the inner surface of the food container 2. The pressure of the air flowing from the gap S2 to the gap S1 causes the sheet 3a to spread to the first to fourth corners 2g, 2h, 2i, and 2j, making it easy for the sheet 3a to come into close contact with the inner wall of the food container 2.

[0069] The food containers 2 may have the same size of the opening 2f but different depths. Even in this case, the sheet 3a is laid in close contact with the inside of the food containers 2 of different depths due to the pressure of the air blown into the gap S2 from the first air outlet 41b.

[0070] When the pushing frame 4 pushes the sheet 3a into the box 2, the open end of the box 2 is inserted into the edge engagement groove 43, and the sheet 3a is folded downward outside the box 2. As a result, at the same time that the pushing of the sheet 3a into the box 2 is completed, the work of folding back the margins 3aa, 3ab, 3ac, and 3ad of the sheet 3a at the open end of the box 2 to form creases is also completed.

[0071] As shown in Fig. 7, when the holding member 91 reaches the upper limit position P13 and the pressing of the sheet 3a is completed (S303), the lifter 9 descends (S304). The lowering of the lifter 9 separates the food container 2 from the pushing frame 4. During this time, the pushing frame 4 blows air from the first air outlet 41b and the second air outlet 42e in the direction in which the food container 2 is separated (arrows F2 and F5 in the figure). Therefore, the sheet 3a is pulled by the pushing frame 4 and does not float up from the food container 2, and the pushing frame 4 and the food container 2 are smoothly separated from each other.

[0072] Furthermore, the food box 2 is sprayed with alcohol immediately before the sheet 3a is laid, and the sheet 3a is supplied with its surface wet. Therefore, when the pressing frame 4 presses the sheet 3a into the food box 2, the sheet 3a and the food box 2 are closely attached to each other. As a result, the sheet 3a pressed into the food box 2 is less likely to shift position when the pressing frame 4 and the food box 2 are separated. Also, even if static electricity is generated between the sheet 3a and the pressing frame 4 when the pressing frame 4 is pressed into the food box 2, the sheet 3a is in close contact with the food box 2 due to the moisture in the alcohol, so the pressing frame 4 can be smoothly separated from the sheet 3a.

[0073] 7, in parallel with the descent of the lifter 9, the fan 45 is stopped (S208). Furthermore, the first to sixth sheet holding portions 61 to 63, 71 to 73 stop ejecting compressed air (S209).

[0074] The first sheet holding portion 61, the third sheet holding portion 63, the fourth sheet holding portion 71, and the sixth sheet holding portion 73 move in the width direction (S210). That is, as shown in Fig. 14, the first sheet holding portion 61 and the third sheet holding portion 63, and the fourth sheet holding portion 71 and the sixth sheet holding portion 73 slide from the attracting position shown by the dotted line in the figure to the non-attracting position shown by the solid line in the figure.

[0075] As shown in FIG. 7, when the lifter 9 descends to the lower limit position P11 (S305), the third stopper 17 descends (S106). As a result, as shown in FIG. 1, the food container 2 is sent from the lift position P3 to the discharge position P4. After the food container 2 is sent from the lift position P3, the third stopper 17 ascends (S107 in FIG. 7). As shown in FIG. 1, if the fourth stopper 18 is ascending, the food container 2 stops at the discharge position P4. When the fourth stopper 18 descends (S108 in FIG. 7), the food container 2 is sent forward from the discharge position P4 and taken out from the sheet supply device 1. When the fourth stopper 18 ascends (S109) as shown in FIG. 7, the process ends.

[0076] The food container 2 on which the sheet 3a has been laid by the sheet supplying device 1 is transported, for example, by a belt conveyor to a location where cooked rice R is to be poured in. As shown in FIG. 3(a), cooked rice R is poured into the food container 2 onto the sheet 3a. The sheet 3a is laid out up to the four corners of the food container 2. Therefore, the sheet 3a is not pushed up and damaged inside the food container 2 when the cooked rice R is poured in. The cooked rice R is also packed into every corner of the food container 2. After that, the margins 3aa, 3ab, 3ac, and 3ad of the sheet 3a are folded back inside the food container 2 to enclose the cooked rice R, as shown in FIG. 3(b).

[0077] In this embodiment, as shown in FIG. 6, the first to sixth sheet holding parts 61-63, 71-73 pull the sheet 3a along the short side direction of the food container 2 on the sides of the short side side parts 2c, 2d of the food container 2, forming slacks SL11, SL12, SL21, SL22 in the margins 3ac, 3ad. Therefore, when the margins 3aa, 3ab in the long side direction of the sheet 3a are folded back as shown in FIG. 3(a), they do not hang down below the food container 2. Therefore, when the food container 2 on which the sheet 3a is laid is transported by a belt conveyor or the like, the margins 3aa, 3ab do not come into contact with or get caught in the belt conveyor, and the sheet 3a can be laid on the food container 2 hygienically. In addition, folds are formed in the sheet 3a along the open end of the food container 2 so that the margins 3aa, 3ab, 3ac, 3ad are folded back downward outside the food container 2. Therefore, the margins 3aa, 3ab, 3ac, and 3ad are not folded back to the inside of the food container 2 during transportation of the food container 2 or during the introduction of cooked rice R, and do not interfere with the introduction of cooked rice R. Therefore, the sheet supplying device 1 can lay the sheet 3a on the food container 2 so that the margins 3aa, 3ab, 3ac, and 3ad do not interfere with subsequent processes.

[0078] As described above, in the sheet supplying device 1 of this embodiment, the first unit 6 and the second unit 7 are disposed at positions facing each other with the food container 2 in between, and as shown in Fig. 9, the first to third sheet holding parts 61 to 63 of the first unit 6 and the fourth to sixth sheet holding parts 71 to 73 of the second unit 7 are disposed between the food container 2 and the pushing frame 4 with the sheet 3a spread out flat. As shown in Fig. 10, the intervals between the first to third sheet holding parts 61 to 63 of the first unit 6 and the intervals between the fourth to sixth sheet holding parts 71 to 73 of the second unit 7 are narrowed in a direction intersecting the separation direction between the first unit 6 and the second unit 7, so that the sheet 3a is pulled in a direction intersecting the separation direction between the first unit 6 and the second unit 7 on both sides of the food container 2, forming slacks SL11, SL12, SL21, and SL22. Accordingly, slacks SL31, SL32 are formed in the sheet 3a in the portion corresponding to the food box 2, as shown in Fig. 6. Since the pushing frame 4 pushes the sheet 3a into the food box 2 while spreading out the slacks SL11, SL12, SL21, SL22, SL31, SL32 of the sheet 3a, as shown in Figs. 12 and 13, the sheet 3a is not stretched while being pushed into the food box 2, and the sheet 3a can be easily laid down up to the outer edge of the bottom 2e of the food box 2 or the first to fourth corners 2g, 2h, 2i, 2j. Furthermore, for example, even if there is a difference in the timing at which the sheet 3a leaves the first to sixth sheet holding portions 61-63, 71-73 of the first unit 6 and the second unit 7 when the pushing frame 4 pushes the sheet 3a into the box 2, the difference is absorbed by the slack SL11, SL12, SL21, SL22, SL31, SL32 of the sheet 3a, so that the margins 3aa, 3ab, 3ac, 3ad of the sheet 3a pushed into the box 2 by the pushing frame 4 can be made uniform between the box 2.

[0079] The embodiments disclosed in this specification are merely examples and do not limit the present invention in any way. Therefore, the technology disclosed in this specification can be naturally improved and modified in various ways without departing from the scope of the invention. For example, the food box 2 may be a container for storing items other than food. Instead of the rectangular food box 2, a cylindrical container with an opening on one side may be used.

[0080] The first to sixth sheet holding parts 61 to 63, 71 to 73 may be arranged below the pair of chucks 53A, 53B to hold the lower surface of the sheet 3a. The first to sixth sheet holding parts 61 to 63, 71 to 73 may be air chucks that hold the sheet 3a by pinching it from above and below, instead of Bernoulli chucks. However, as shown in Figs. 11 to 13, the first to sixth sheet holding parts 61 to 63, 71 to 73 hold one side of the sheet 3a, so that the sheet 3a is less likely to get caught by the first to sixth sheet holding parts 61 to 63, 71 to 73, and the sheet 3a can be stably held. In addition, the first to sixth sheet holding parts 61 to 63, 71 to 73 that hold one side of the sheet 3a have fewer restrictions on arrangement and operation than those that hold both sides or sides of the sheet 3a, and can reliably hold any position of the sheet 3a in a short time. This is particularly beneficial in the vicinity of the sheet presser 52 and the cutting portion 55, where it is difficult to hold both sides or the sides of the sheet 3a.

[0081] The number of sheet holding parts included in the first unit 6 and the second unit 7 is not limited to that in the above embodiment. Figures 15(a), 15(b), and 16(a) show modified examples of the number of sheet holding parts. The sheet holding parts indicated by white circles are sheet holding parts that can move in the planar direction, and the sheet holding parts indicated by black circles are sheet holding parts that cannot move in the planar direction.

[0082] For example, as in the first unit 6A and the second unit 7A shown in FIG. 15(a), the second sheet holding portion 62 and the fifth sheet holding portion 72 may be omitted. However, as in the first unit 6 and the second unit 7 shown in FIG. 6, by having the second sheet holding portion 62 and the fifth sheet holding portion 72, the slacks SL11, SL12, SL21, and SL22 of the sheet 3a can be stably formed on both sides of the food container 2 with the second sheet holding portion 62 and the fifth sheet holding portion 72 as base points. In addition, the first and second units 6 and 7 shown in FIG. 6 can increase the number of pleats that become slack and reduce the size of each pleat compared to the first and second units 6A and 7A shown in FIG. 15(a). Therefore, the slacks SL11, SL12, SL21, and SL22 of the sheet 3a tend to spread as the push-in frame 4 is inserted, making it easier to lay the sheet 3a up to the four corners of the food container 2.

[0083] For example, as shown in the first unit 6B and the second unit 7B in Fig. 15(b), the second and fifth sheet holding parts 62, 72 may be omitted, and the third and sixth sheet holding parts 63, 73 may be arranged to be immovable. However, as shown in Fig. 6 or Fig. 15(a), if the first, third, fourth and sixth sheet holding parts 61, 63, 71 and 73 are each made to slide in a planar direction, the slack in the sheet 3a is formed near the middle of the adjacent corners of the food box 2. In this case, the sheet 3a can spread the slack evenly toward the four corners of the food box 2 in response to the insertion of the push-in frame 4, so that the size of the margins 3aa, 3ab, 3ac and 3ad can be easily managed.

[0084] 16(a), four sheet holding parts 61C-64C, 71C-74C may be arranged on each side of the food container 2. In this case, for example, the first unit 6C may have the sheet holding parts 61C-64C slide toward the middle between the first corner 2g and the second corner 2h, thereby narrowing the gap and forming slack in the sheet 3a.

[0085] As shown in the first unit 6E and the second unit 7E in Figure 16 (b), the first to sixth sheet holding portions 61-63, 71-73 may be arranged on the sides of the long side surface portions 2a, 2b of the food container 2, thereby forming slack in the sheet 3a on both sides in the short side direction of the food container 2.

[0086] The press-in frame 4 may not be hollow inside, but may have a flow path that connects the fan 45 to the first air outlet 41b and the second air outlet 42e.

[0087] A pre-cut sheet 3a may be used instead of the sheet roll 3. In this case, for example, the pre-cut sheet 3a may be stored in a sheet storage section, and a pickup device may pick up the sheet 3a from the sheet storage section and have the sheet 3a held by the first to sixth sheet holding sections 61 to 63, 71 to 73. Alternatively, the first to sixth sheet holding sections 61 to 63, 71 to 73 may have a function of holding the sheet 3a in the sheet storage section and moving the sheet 3a between the box weight 2 and the pushing frame 4.

[0088] The lifter 9 may be omitted, and the pushing frame 4 may be lowered to push the sheet 3a into the box 2. The pushing frame 4 and the box 2 may move relative to each other, and the pushing frame 4 may push the sheet 3a into the box 2.

[0089] The processing sequence shown in FIG. 7 may be changed as appropriate, processing may be omitted, or other processing may be added, without departing from the spirit of the invention. [Explanation of symbols]

[0090] 1 Sheet Feeder 2. Box (Example of container) 3a Sheet 4. Push-in frame (an example of a pushing part) 6 Unit 1 7 Unit 2 61 First sheet holding portion (an example of a first movable sheet holding portion) 62 Second sheet holding portion (an example of a first fixed sheet holding portion) 63 third sheet holding portion (an example of a second movable sheet holding portion) 71 Fourth sheet holding portion (an example of a third movable sheet holding portion) 72 Fifth sheet holding portion (an example of a second fixed sheet holding portion) 73 6th sheet holding portion (an example of the 4th movable sheet holding portion)

Claims

1. A sheet supplying device that lays a sheet in close contact with the inside of a container that has an opening on one side, A pushing portion that is inserted into an opening of the container and pushes the sheet into the container; a first unit and a second unit that are disposed at positions facing each other across the container and that hold the sheet between the container and the pushing portion; having The first unit and the second unit each include The sheet holder includes a plurality of sheet holders arranged at predetermined intervals in a planar direction and configured to hold the sheet in a planar state; a slack is formed in the sheet by narrowing an interval between the plurality of sheet holding parts that hold the sheet in a planar state in a direction intersecting a direction in which the first unit and the second unit are spaced apart from each other; A sheet supplying device comprising:

2. 2. The sheet feeding device according to claim 1, the plurality of sheet holding portions of the first unit and the plurality of sheet holding portions of the second unit hold one side of the sheet; A sheet supplying device comprising:

3. 3. The sheet supplying device according to claim 1, The container has a rectangular parallelepiped shape, a first sheet holding portion and a second sheet holding portion included in the plurality of sheet holding portions of the first unit, and a third sheet holding portion and a fourth sheet holding portion included in the plurality of sheet holding portions of the second unit are disposed at positions corresponding to corners of the container, and hold the sheet in a flat state. A sheet supplying device comprising:

4. 3. The sheet supplying device according to claim 1, The container has a rectangular parallelepiped shape having a pair of long sides and a pair of short sides, The plurality of sheet holding portions of the first unit are disposed on one side of a short side and spaced apart from each other along the short side, The plurality of sheet holding portions of the second unit are disposed on the sides of the other short side, and are spaced apart from each other along the short side. A sheet supplying device comprising:

5. 3. The sheet supplying device according to claim 1, the plurality of sheet holding portions of the first unit include a first fixed sheet holding portion that is immovably arranged, and a first movable sheet holding portion and a second movable sheet holding portion that are arranged on both sides of the first fixed sheet holding portion along the container and are movable in a planar direction toward the first fixed sheet holding portion, the plurality of sheet holding portions of the second unit include a second fixed sheet holding portion that is immovably arranged, and a third movable sheet holding portion and a fourth movable sheet holding portion that are arranged on both sides of the second fixed sheet holding portion along the container and are movable in a planar direction toward the second fixed sheet holding portion; A sheet supplying device comprising:

6. A sheet supplying device for laying a sheet inside a container having an opening on one side, comprising: a sheet roll on one side of the sheet; a pull-out section that pulls out the sheet from the sheet roll above an opening of the container; a plurality of sheet holding sections disposed above the drawer section and configured to hold the sheet drawn out by the drawer section; a cutting unit that cuts the sheet held by the plurality of sheet holding units at a position between the container and the sheet roll; having A sheet supplying device comprising:

7. The sheet supplying device according to claim 6, the plurality of sheet holding portions hold an upper surface of the sheet by suction, a pushing portion that is inserted into an opening of the container and pushes the sheets held by the sheet holding portions into the container, The sheet is released from the sheet holding parts according to a tension acting on the sheet when the pushing part is inserted into the container. A sheet supplying device comprising:

8. The sheet supplying device according to claim 6 or claim 7, The plurality of sheet holding portions are Bernoulli chucks that suction and hold the sheet by forming a vacuum region between the sheet holding portions and the sheet. A sheet supplying device comprising:

9. The sheet supplying device according to claim 6, a pushing portion that is inserted into an opening of the container and pushes the sheets held by the sheet holding portions into the container, the pull-out section has a pair of chucks that are capable of linear reciprocating motion between a retreated position and an advanced position, the retreated position being a position on the sheet roll side of the container or the push-in section, where the pair of chucks grip the sheet, and the advanced position being a position on the opposite side of the container or the push-in section from the sheet roll, where the pair of chucks release the sheet, After the sheet holding portions hold the sheet, the pair of chucks release the sheet and retract from the advanced position to the retracted position before the pushing portion is inserted into the container. A sheet supplying device comprising:

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