JP2578322Y2 - Sheet insertion device - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention is based on the idea that a bag made of synthetic resin such as a polyethylene sheet is inserted into an opening case such as a cardboard box and a paper box, and the edge of the bag is placed outside the edge of the box. The present invention relates to a sheet insertion device that is folded back and held in an open state.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for inserting a sheet into an opening case of the above-mentioned example, there is an apparatus having the following structure, for example. That is, a sheet winding portion for winding a long, completely continuous bag-shaped sheet without perforations, sheet feeding means for leading the sheet of the sheet winding portion above the opening case, and the sheet feeding means A fixed receiving portion which is located at a lower portion of the leading end and sucks and holds the sheet from the sheet feeding means; Part, sheet insertion means for reciprocating above the opened bag-like sheet and inside the open case to insert the sheet into the case, and folding back the sheet rim outward from the rim of the open case. Means for inserting a sheet into an open case, wherein a seal portion for heat-sealing the bag-like sheet is provided at a position preceding the cutting opening.

However, the above-mentioned conventional apparatus has the following problems. That is, a bag-like
Even if the sheet is inserted into the open case, a bag-shaped
There is a problem that the sheet cannot be
Was. The state in which the bag-like sheet does not adhere to the case as described above
Fold the sheet edge to the opening case edge with
When storing items in the process of
When the sheet comes into contact with the inner wall of the case, the bag-shaped sheet
Concentrated load in the direction of being drawn into the case at the folded part
Since the weight acts, it is a worry that the sheet in this part will be damaged
There is.

[0004]

[Devised Problems to be Solved by Invention This invention is, in the case
Insert the bag-shaped sheet into the case at the same time
It is an object of the present invention to provide a sheet insertion device that can be surely brought into close contact with a sheet.

[0005]

Means for Solving the Problems] This invention is a bag-shaped by contact and separate the front and rear of the vacuum suction pad for sucking a bag-like sheet upper end
Opening means for opening the sheet;
Place the opening case below and open the bag-like sheet into the opening case.
Open the sheet insertion frame to be inserted into the
Sheet insertion means for reciprocating in the mouth case to insert the bag-like sheet into the opening case, and the vacuum of the opening means is provided .
Open the upper edge of the bag-like sheet with the suction pad and insert the sheet.
Insert the bag-like sheet into the open case with the sheet insertion frame of the
A sheet inserting device for entering, forming a plurality of injection holes of the air ejected directed laterally inside the bag-shaped sheet in a state under which the bag-like sheet is inserted in the opening case by the sheet inserting means A sheet insertion device provided with an air nozzle described above and connected to a sheet insertion frame of the sheet insertion means.

[0006]

According to the invention, the sheet insertion means
At the same time as inserting the bag-like sheet,
When the air nozzle is in the sheet with the
To blow air directed sideways from the nozzle hole,
As soon as the sheet is inserted, make sure that the bag-like sheet is
Can be in close contact. In addition, the air
, So it works well with relatively weak wind
Can also be combined with air directing to the side
For this reason, it is possible to pull in the folded part of the bag-like sheet.
And it is possible to insert the bag-like sheet securely and reliably .

[0007]

An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show an automatic sheet insertion apparatus, and are shown in FIGS.
In this automatic sheet insertion device, a box transport device B that transports a cardboard box A as an open case from a standby position α to a sheet insertion position β, and a stopper device that stops the cardboard box A at the above-described sheet insertion position β (see FIG. Not shown)
And a winding portion D for winding a long continuous bag-shaped sheet S without perforations, and the sheet S of the above-mentioned winding portion D is guided and conveyed above the cardboard box A at the sheet insertion position β. And a cutting device F for cutting the sheet S into a predetermined length corresponding to the size of the cardboard box A.
And an opening device G for opening the cut bag-shaped sheet S by vacuum suction, and a reciprocating motion above the opened bag-shaped sheet S and inside a cardboard box A as an opening case, so that the sheet S is A sheet insertion device H to be inserted into the box A;
Device J that folds the edge of the cardboard box A outward from the edge of the upper end opening of the cardboard box A, and the sheet S is inserted into the four corners (corner edges) of the cardboard box A when the sheet S is inserted by the sheet insertion device H described above. Control device C to prevent interference
And a corner restricting device X that corrects each of the four corners on the upper outer surface of the cardboard box A into a right angle at the sheet insertion position β, and a bag-like sheet S opened by the opening device G from above. An air nozzle device P for blowing air into the bag-like sheet S, a sheet welding device K for thermally welding the bag-like sheet S in the middle of the above-mentioned winding part D and cutting device F, and a sheet welding device K A punching device L for punching a small-diameter air introduction hole in the bag-shaped sheet S at the rear position
A shifting device M for relatively shifting the upper and lower sides of the bag-shaped sheet S left and right, and a sheet stretching device N for stretching the upper end of the bag-shaped sheet S opened by the above-described opening device G to straighten the rectangular shape. And

In the above-mentioned box transporting apparatus B, a conveyor frame 2 is mounted on a base 1 and a roll conveyor 5 is arranged between the front and rear side plates 3 and 4 on the conveyor frame 2 so that the cardboard box A can be arranged as shown in FIG. It is configured to transport in the direction of arrow a.

The above-described sheet regulating device C and corner regulating device X are configured as shown in FIGS. That is, the front and rear side plates 3, 4 on the conveyor frame 2 described above.
A total of four brackets 6 are fixed at predetermined intervals, and poles 7 that can be adjusted up and down are respectively attached to these brackets 6, and the blocks 8 are fixed to the upper ends of these poles 7, respectively. An inverted L-shaped base block 10 is provided for each of these blocks 8 via shafts 9 that can be adjusted in the front-rear direction (left-right direction in FIG. 4).

The base block 10 on the front side (left side in FIG. 4)
A total of four support frames 11 are mounted on the left and right of the upper horizontal plane with the base block 10 on the rear side (the right side in FIG. 4), and a long hole 1 is provided between the support frames 11 on the same side.
The upper cylinder base 12 is attached via the first and second support frames 11a and 11a so as to be vertically adjustable.
A lower cylinder base 13 is attached to a lower portion between the upper and lower portions 11 through long holes 11b, 11b so as to be vertically adjustable.

A total of four sheet regulating blocks 16 are attached via a movable frame 15 to the tip of a piston rod of an air cylinder 14 attached to the center of the above-mentioned upper cylinder base 12, so that the above-mentioned sheet regulating device C is mounted. Make up.

The sheet regulating device C is normally held at the retracted position shown in FIG. 5 in the normal state. However, when the sheet S is inserted by the sheet inserting device H, specifically, immediately before the sheet inserting device H descends, the air is restricted. By driving the cylinder 14, the above-mentioned sheet regulating blocks 16 project as shown in FIG.
Wraps around the four corners of the cardboard box A as viewed from above to prevent the bag-shaped sheet S from interfering with the corner edges of the cardboard box A. Here, the above-described sheet regulating block 1
The surface corresponding to the inside of the box 6 is formed as a tapered surface 16a.

A total of four corner regulating blocks 19 are attached to the distal end of a piston rod of an air cylinder 17 attached to the center of the lower cylinder base 13 via a movable frame 18, so that the corner regulating device X described above is attached. Is composed.

The corner regulating device X is normally held at the retracted position shown in FIG. 7 in a normal state, but before the sheet S is inserted by the sheet inserting device H, the corner regulating device X is driven by driving the air cylinder 17 as described above. The blocks 19 are projected as shown in FIG. 8, and the four corner portions on the upper outer surface of the cardboard box A are straightened by these four corner regulating blocks 19. Here, the surface corresponding to the inside of the box of each corner control block 19 is formed as a right-angled surface 19a. In addition, both inner and outer flaps 24 are provided on the box body 23 through folds 25.
In the present embodiment, the flap 24 is configured to be straightened by the above-described corner regulating blocks 19. In FIGS. 3, 5, 6, 7, and 8, reference numeral 20 denotes the movable frames 15, 18.
Guide rod attached to the side, 21 is the cylinder base 12,1
This is a guide cylinder fixed to the third side.

The winding section D for winding a long continuous bag-shaped sheet S without perforations is constructed as shown in FIG. That is, a raw roll 27 is attached to the rear lower portion of the main body housing 22 via a roll holder 26, and a continuous continuous bag-shaped long sheet S without perforations is wound around a core 28 of the raw roll 27. Turn and configure. In this embodiment, a polyethylene sheet is used as the sheet S.

As shown in FIG. 2, the sheet feeder E for guiding the sheet S of the winding portion D above the cardboard box A at the sheet insertion position β includes a guide roller 29, opposed rollers 30, 30, a tension roller 31, guide roller 3
2. It is composed of opposed rollers 33, 33 and a drive motor (not shown).

A sheet welding apparatus K for thermally welding the bag-like sheet S between the above-mentioned rollers 32 and 33 at an intermediate portion of the sheet conveying path includes a nichrome heating wire (not shown) above the receiving table 34 on the lower surface of the sheet S. The heater 35 having the inside is opposed to the heater 35, and the heater 35 is connected to a piston rod of an air cylinder 36.

At the next step of the sheet shifting operation described later, the piston rod is moved downward by the above-described downward movement.
The heater 35 heated to 0 to 200 ° C. is set to about 0.3 to 0.8
By pressing the sheet S for 2 seconds, the bag-shaped sheet S is thermally welded to form a linear welded portion 37 (see FIG. 30).

A punching device L for punching a small-diameter air introduction hole in the bag-like sheet S at the rear of the sheet welding device K;
In this embodiment, the apparatus M for relatively shifting the top and bottom of the bag-shaped sheet S left and right is configured as an integrated unit.
That is, as shown in FIGS. 1 and 9 to 11, the bag-shaped sheet S is orthogonal to the conveying direction (the direction of arrow d) of the bag-shaped sheet S.
A fixed channel 38 is provided above the fixed channel 38, and two units 39,
40 are arranged. Each of these units 39,4
Since 0 is a symmetrical structure, one unit 40 will be described in the following description.

As shown in FIGS. 9 to 11, the unit 40 has inverted L-shaped mounting pieces 41, 41 fixed to the lower surface of the fixed channel 38 so as to face each other.
Slide guide cylinders 42 are fixed to upper and lower portions of 41, respectively, and rods 43, 43 are slidably inserted between opposed slide guide cylinders 42, 42, respectively.

An outer block 45 is fixed to the upper and lower rods 43 by using screws 44. An inner block 47 slidable up and down is provided in a concave guide groove 46 of the outer block 45. doing. A concave stopper 48 having a predetermined depth is formed on the upper portion of the inner block 47, and a rubber 49 is attached and fixed to a lower surface of the inner block 47 facing the sheet S.

An air cylinder 50 for raising and lowering the inner block and an air cylinder 51 for raising and lowering the needle are fixed to the top surface of the outer block 45 by bolts, and the lower end of the piston rod of the air cylinder 50 is fixed to the inner block 47. On the other hand, a needle 53 having a solid cross section is attached to the lower end of the piston rod of the air cylinder 51 via a connecting plate 52.

Further, an air cylinder 54 for integrally sliding the above blocks 45 and 47 is bolted and fixed to the outer surface of the mounting piece 41, and the tip of the piston rod of the air cylinder 54 is attached to the side surface of the outer block 45. , And the air cylinder 51 and the needle 53 constitute the perforating device L, and the other components constitute the displacing device M.

The piercing operation and the shifting operation by the above-described devices L and M are as follows. First, from the normal state shown in FIG. 9, the above-described air cylinders 50 and 51 are simultaneously driven to lower the inner block 47 along the guide groove 46 of the outer block 45 as shown in FIG. S is fixed to a receiving member (not shown).

At this time, one air cylinder 50 finishes descending, while the other air cylinder 51
The stroke of the air cylinder 51 causes the needle 53 to move further below the lower surface of the inner block 47 at the lowered position, as shown in FIG. Then, a small-diameter air introduction hole 55, a so-called needle hole, is formed through the bag-shaped sheet S through the hole. The position where the air introduction hole 55 is formed corresponds to a predetermined portion of the sheet that is folded back with respect to the cardboard box A.

Next, only the piston rod of the other air cylinder 51 is moved back from the state shown in FIG. 13 to return the needle 53 to the normal position as shown in FIG. Next, from the state shown in FIG.
, And the blocks 45, 47 are moved laterally together with the two upper and lower rods 43, 43, so that the upper and lower sides of the bag-shaped sheet S can be relatively shifted left and right as shown in FIG.

As described above, the sheet S is
Air introduction holes 55 are formed in the upper and lower sheets S while introducing the external air between the upper and lower sheets S.
Is shifted to form a layer of the externally introduced air in the sheet S. Thereafter, each of the devices L and M is moved to the position shown in FIG. 15 by the return movement of the one air cylinder 50 and the side air cylinder 54 described above.
From the state shown in FIG. 9 to the normal state shown in FIG. Such an operation is performed simultaneously and symmetrically by the left and right units 39 and 40.

By the way, a cutting device F for cutting the above-mentioned bag-shaped sheet S into a predetermined length corresponding to the shape of the cardboard box A.
As shown in FIG. 2, a cutting blade 56 that is driven in conjunction with an opening device G described below is disposed below the opposed rollers 33, 33. It is needless to say that a sheet fusing cutter using a hot wire or the like may be used instead of the cutting blade 56.

An opening device G for holding the bag-shaped sheet S fed from the above-mentioned opposed rollers 33, 33 and cutting the bag-shaped sheet S with a cutting blade 56 and then vacuum-sucking and opening the bag-shaped sheet S is shown in FIG. It is configured as shown in FIGS. That is, a front frame 57 and a rear frame 58 that are driven to approach and separate from each other are provided in parallel with each other, and a vacuum is connected to a facing portion of each of the frames 57 and 58 via a negative pressure suction pipe, a so-called vacuum hose (not shown). Vacuum suction pads 59 and 60 communicating with a suction device (not shown) are attached.

The above-mentioned front frame 57 is fixed to the tip of a piston rod 62 of an air cylinder 61 having a relatively long stroke, and guide rods 63, 63 attached to both sides of the front frame 57 are attached to the main housing 22.
Slidably inserted into the fixed guide cylinders 64, 64 on the side.

Spacers 65 and 66 having different lengths are attached to both rear sides of the rear frame 58, respectively.
A swash plate 67 is stretched between the spacers 65 and 66.
The tip of the piston rod 69 of the air cylinder 68 disposed at right angles to the swash plate 67 and the swash plate 6
The guide rods 70, 70 attached to both sides of the swash plate 67 are slidably inserted into fixed guide cylinders 71, 71 on the main body housing 22 side.

The opening angle of the air cylinder 68 with respect to the vertical line ν of the rear frame 58 is θ, and the entire stroke of the piston rod 69 of the air cylinder 68 is l (FIG. 18).
When the vacuum cylinder 60 is driven forward by the driving of the air cylinder 68, the pad 60 is shifted leftward by l · tan θ in the drawing. In the normal state of the above-described opening device G, as shown in FIG. 16, the front frame 57 and the rear frame 58 are separated by a predetermined amount.

The opening operation of the bag-shaped sheet S by the opening device G is as follows. First, in the state of FIG.
When the bag-shaped sheet S of a predetermined length is fed to the front of the vacuum suction pads 60, 60 from between the opposed rollers 33, 33 (see FIG. 2), the piston rod 62 of the air cylinder 61 moves in the direction of arrow e. Then, the front frame 57 is moved closer to the rear frame 58 as shown in FIG.
The bag-shaped sheet S is held by the vacuum suction pads 59
Adsorb the top of

At the time of the suction, the cutting blade 56 cuts the upper portion of the suction portion of the bag-shaped sheet S. The above-described air cylinders 61 and 68 are driven from the state shown in FIG. 17, and the bag-shaped sheet S after cutting is moved to a position corresponding to one reference plane on one side of the cardboard box A as shown in FIG. Let go forward.

Next, only the other air cylinder 61 is advanced from the state shown in FIG. 18, and the upper end of the bag-shaped sheet S sucked by the vacuum suction pads 59 and 60 is opened as shown in FIG. Next, in the state shown in FIG. 19, the sheet stretching device N, which will be described later, is driven so that the rotating fingers 75 are engaged with the four corners at the upper end of the opened bag-shaped sheet S, as shown in FIG. The sheet S is stretched in a square shape. Here, when changing from the state of FIG. 17 to the state of FIG.
Since the vacuum suction pads 60, 60 attached to the bag are shifted to the left by 1 · tan θ, the bag-shaped sheet S is shifted by this position to make it easier for external air to flow in, thereby facilitating the next opening operation.

The above-mentioned vacuum suction pads 59 and 60 are shown in FIG.
28 are configured as shown in FIG. That is, each of these vacuum suction pads 59 and 60 is provided with a suction block 91 having a suction port 90 for a vacuum pump (not shown) at the center of the lower end. An open columnar suction chamber 92 is formed, and a suction adjuster 93 is disposed in the suction chamber 92 so as to variably adjust a separation distance T from a suction end face of the suction block 91, that is, a depth.

That is, the adjusting screw 94 integrally formed on the back surface of the suction adjuster 93 is screwed into the screw portion 95 of the suction block 91, and the adjusting screw 94 protrudes outward from the back surface of the suction block 91. By disposing an adjust nut 96 and a lock nut 97 in the above, the distance T is variably adjusted according to the material, rigidity and thickness of the bag-shaped sheet S to be used.

The interval U between the outer peripheral surface of the suction adjuster 93 and the inner peripheral surface of the suction block 91 is set to a predetermined small interval so that the sheet S does not enter the suction chamber 92.

Further, on the sheet suction side of the suction adjuster 93, a suction area increasing means for increasing the suction area of the sheet S is provided. As the suction area increasing means, a substantially cross-shaped groove 98 as shown in FIGS.
26 and 27, and a structure in which a number of through holes 100 are formed in the annular groove 99 as shown in FIGS.

Further, a rubber-based resin material 101 is bonded to the outer surface of the suction block 91 on the sheet suction side.
The air-tightness between the sheet S and the vacuum suction pads 59 and 60 at the time of vacuum suction of the bag-shaped sheet S is ensured, and when the cut portion of the bag-shaped sheet S by the opening device G is opened while being shifted, this The rubber-based resin material 101 is configured to generate good frictional resistance between the sheet S and the vacuum suction pads 59 and 60.

Incidentally, the above-mentioned vacuum suction pads 59,
Numeral 60 is attached to each of the frames 57 and 58 as shown in FIG. A long hole 57a is formed in the front frame 57, and a screw bush 102,
While the nut 102 is mounted to be adjustable in the left-right direction by nuts 103, 103, two mounting rods 104, 104 erected on the above-mentioned vacuum suction pad 59 are inserted into the above-mentioned bushes 102, 102, and these are mounted. Bush 10
The above-mentioned mounting rod 1 which is led out from the second and the second 102
Washers 106, 106 are attached to the end faces of the bushes 104, 104 using bolts 105, 105, and a coil spring 10 is provided between the bushings 102, 102 and the spring retainers 107, 107 of the mounting rod 104.
8,108 are stretched.

As described above, the above-described coil spring 10
When the air cylinder 61 is operated in the direction of arrow e from the state shown in FIG. 16 to press the front and rear vacuum suction pads 59 and 60 through the sheet S in the state shown in FIG. The appropriate amount of pad-to-pad pressure is obtained by the amount of deflection of the coil springs 108, 108.

On the other hand, a long hole 58a is formed in the rear frame 58, and two mounting screws 109, 109 erected on the back of the vacuum suction pad 60 are inserted into the long hole 58a. The mounting screws 109, 109 are mounted so as to be adjustable in the left-right direction by a pair of washers 110 and nuts 111.

As described above, the front and rear vacuum suction pads 5
9 and 60 are attached to the corresponding front and rear frames 57 and 58 so as to be adjustable left and right, so that the shift amount W corresponding to the front and rear l · tan θ can be arbitrarily selected according to the type of the sheet S to be used. ing.

The sheet stretching device N which stretches the upper end of the bag-like sheet S opened by the above-described opening device G to form a square is shown in FIG.
The configuration is as shown in FIGS. That is, there are provided rotary actuators 72 and 73 (air swing motors) spaced apart above the opening position of the bag-shaped sheet S, and drive shafts 74 projecting from front and rear of the rotary actuators 72 and 73, respectively. Are fitted and fixed with substantially L-shaped rotating fingers 75.

When the opened bag-shaped sheet S is opened by the above-described opening device G as shown in FIG. 30, each of the rotary actuators 72 and 73 described above is driven to drive the arrow f of the drive shaft 74. By rotating 90 degrees in the direction (see FIG. 31), the rotating fingers 75 are engaged with the four corners in the upper end opening of the bag-shaped sheet S as shown in FIG. At 75, the four corners of the bag-shaped sheet S are stretched in four directions to form a square, and the upper end posture of the opened bag-shaped sheet S is properly corrected.

By the way, reciprocating motion is made between the upper part of the opened bag-shaped sheet S and the inside of the cardboard box A as an opening case.
Sheet insertion device H for inserting sheet S into cardboard box A
Are configured as shown in FIG. That is, the support 76 is erected on the upper front part of the main body housing 22 and
And an air cylinder 79 for ascending and descending are connected via brackets 77 and 78. Then, the sheet insertion frame 80 is fixed to the tip of the piston rod of the air cylinder 79 to constitute the above-described sheet insertion device H.

The above-mentioned sheet insertion frame 80 is shown in FIGS.
As shown in FIG. 6, a total of four standing frame rods 81... Corresponding to the four corners in the opened cardboard box A via predetermined elevating spaces are connected to each other by upper and lower connecting members 82, 83. By the piston rod of the air cylinder 79 described above,
The sheet S is inserted into the cardboard box A by reciprocating between the upper part of the opened bag-shaped sheet S (see FIG. 32) and the inside of the opened cardboard box A (see FIG. 35).

A total of four frame rods 81 are provided with folding actuators 84 which can be adjusted vertically by manual operation.
Are attached to form the folding device J described above.

Each of these folding actuators 84.
Are folded rods 85 as shown in FIGS.
Is an actuator for turning the upper edge of the bag-shaped sheet S inserted into the cardboard box A outward from the flaps 24...

The operation of the above-described sheet insertion device H and folding device J is as follows. First, the bag-shaped sheet S opened by the above-described opening device G and whose upper end posture is corrected by the sheet stretching device N is lowered by the sheet insertion frame 80 located above the sheet S as shown in FIG. 33, and inserted into the cardboard box A opened as shown in FIG.

The upper end of the bag-like sheet S inserted into the cardboard box A is spread outward in a reverse U-shape by a folding actuator 84 and a tapered guide surface 86 at the lower end.

Next, when the folding rods 85 of the folding actuators 84 project from the state shown in FIG. 34 as indicated by arrows in FIG. 35, the upper end of the bag-shaped sheet S is moved to the cardboard box as shown in FIG. A is folded back outward from the edge of the upper end of each flap 24 of A, and the open state is maintained.

Next, as shown in FIG. 36, after the above-mentioned sheet insertion frame 80 is lifted away from the cardboard box A by the backward movement of the air cylinder 79, a stopper device for regulating the cardboard box A to the sheet insertion position β. (Not shown), the sheet regulating device C and the corner regulating device X are returned to the normal state, and the cardboard box A after the completion of sheet insertion by the roll conveyor 5 of the box conveying device B is placed in the first position. It is transported in the direction of arrow a in the figure.

1 is a stopper for temporarily stopping the cardboard box A at the standby position α. The stopper 87 is operated by an air cylinder 88.

Incidentally, the above-described air nozzle device P is shown in FIG.
The configuration is as shown in FIG. That is, the inner nozzle 113 is disposed along the axis of the cylindrical outer nozzle 112, and the respective air passages 114, 115 of the nozzles 112, 113 are supplied with the same air supply via different air supply passages. A source (not shown) and a nozzle holder 116 on the outer periphery of the upper part of the outer nozzle 112 described above.
The nozzle holder 116 is attached to the frame rod 81 of the sheet insertion frame 80 so that the vertical position can be adjusted.

At the lower end of the inner nozzle 113, a downwardly directed injection hole 116 is formed, while on the outer nozzle 112, a plurality of approximately orally directed injection holes 117 are formed.
The upper end of the bag-shaped sheet S is opened by the opening device G, and only the above-described inner nozzle 113 is driven during the suction operation of the vacuum suction pads 59 and 60 to form the injection hole 116.
29, the air is sprayed from above the bag-like sheet S into the inside of the bag-like sheet S, and the bag is opened from an insufficient opening state as shown by a virtual line in FIG. It is configured so that substantially the entire inside of the sheet S is filled with air.

Further, the above-mentioned outer nozzle 112 is shown in FIG.
Is driven in the state shown in FIG. 3 and air is blown from the inside of the bag-shaped sheet S inserted into the cardboard box A in a direction in which the sheet S comes into close contact with the inner surface of the box, and the incomplete sheet only by the sheet insertion frame 80 is used. The insertion state of S is improved, and the bag-shaped sheet S is closely inserted into the inner surface of the box.

The illustrated embodiment is constructed as described above, and the operation will be described below. First, as shown in FIGS. 1 and 2, the above-described box conveying device B conveys the upper opening type cardboard box A having the inner and outer flaps 24 erected to the bag-like sheet insertion position β, and a stopper device (not shown). ), The cardboard box A is positioned at a predetermined position.

Next, the corner controlling device X shown in FIG. 7 is driven to correct the flap 24 of the cardboard box A into a right angle as shown in FIG. 8 by a total of four corner controlling blocks 19.

Next, the sheet regulating device C shown in FIG. 5 is driven to advance a total of four sheet regulating blocks 16 so as to overlap with the four corner edges of the cardboard box A when viewed from the plane (FIG. 6). reference). It should be noted that the driving time of the above-described sheet regulating device C may be before the lowering of the sheet inserting device H.

Next, the bag-shaped sheet S is conveyed by a predetermined length by the sheet feeding device E shown in FIG. Next, as shown in FIGS. 9 to 15, the air introducing holes 55 are pierced in the bag-shaped sheet S by the operation of the piercing device L and the shifting device M,
External air is introduced into the bag S by relatively shifting the top and bottom of the bag S.

Next, a predetermined position (specifically, about 50 mm before the punching position by the needle 53) on the raw roll 27 side from the punching position is thermally welded by the sheet welding apparatus K shown in FIG. The part 37 is formed. Next, the perforated bag-shaped sheet S is placed on the vacuum suction pad 60 in the opening device G,
The length corresponding to the shape of the cardboard box A is supplied to the front part of the container 60.

Next, the above-mentioned opening device G is driven from the state of FIG. 16 as shown in FIG. 17 to suck and hold the bag-like sheet S by the front and rear vacuum suction pads 59 and 60, and the cutting device F The sheet S above the suction section is cut.

When the bag-shaped sheet S is sucked by the vacuum suction pads 59 and 60, as shown in FIGS. 23 and 28, the above-mentioned suction adjuster 93 is previously adjusted to a depth corresponding to the material, rigidity and thickness of the sheet S. Since this is set to T, a wrinkle through which outside air is introduced is formed on the side of the bag-shaped sheet S to be opened due to the depth T, and outside air is introduced into the opening side of the bag-shaped sheet S by the formation of the wrinkles. Accordingly, a stable opening operation of the bag-shaped sheet S in the next step can be performed.

The distance U between the outer peripheral surface of the suction adjuster 93 and the inner peripheral surface of the suction block 91 is small enough to prevent the cut surface S 1 of the cut bag-shaped sheet S, so-called ear, from entering the suction chamber 92. Therefore, it is possible to prevent a leak phenomenon of the vacuum pressure and prevent a decrease in the vacuum pressure. Therefore, it is possible to secure a suction force of the bag-shaped sheet S.

Next, from the state shown in FIG. 17 through the state shown in FIG. 18, the opening device G performs opening processing on the cut bag-shaped sheet S as shown in FIG. When the state shown in FIG. 18 is reached, outside air is further introduced into the bag from the bag-shaped sheet S by the leftward movement of the vacuum suction pads 60 on one side, W = 1.tanθ (see FIGS. 18 and 21). This facilitates opening processing. Here, at the time of the above-described shifting operation, a good frictional resistance is generated between the sheet S and the vacuum suction pads 59 and 60 by the rubber-based resin material 101, so that such shifting operation can be reliably performed.

Next, as shown in FIGS. 20 and 31, the rotating fingers 75 of the sheet stretching device N are engaged with the four corners at the upper end of the opened bag-shaped sheet S, and the vacuum suction pads 59, 6 are engaged.
The above four corners where the vacuum suction force by 0 does not sufficiently reach are pulled in four directions to correct the posture of the upper end of the sheet into a square shape.

Under the state shown in FIG. 20 (the vacuum suction pad 5
When the inner nozzle 113 of the air nozzle device P is driven and air is blown into the inside of the bag-like sheet S from the injection hole 116 at the lower end of the bag-like sheet S in FIG. As shown by the solid line in FIG. 3, air is filled from the insufficient opening state shown in FIG.

Next, as shown in FIGS. 32 to 36, the sheet inserting device H and the folding device J are driven to put the bag-like sheet S in the cardboard box A opened at the sheet inserting position β.
At the same time, the upper end opening of the sheet S is folded back to the outside of the flap 24 by the folding actuator 84, and after the folding is completed, the above-described sheet insertion device H and the folding device J are returned to the normal position shown in FIG. Note that the above-described air introduction hole 55 is located outside the folded portion. Here, in a state shown in FIG. 34 described above, that is, in a state in which the bag-shaped sheet S is inserted into the cardboard box A, the outer nozzle 11 in the air nozzle device P described above.
2 is driven and air is blown from the plurality of injection holes 117 to bring the above-mentioned bag-shaped sheet S into close contact with the inner surface of the cardboard box A.

Next, the stopping and holding of the cardboard box A at the sheet insertion position β by the stopper device (not shown) is released, and the sheet regulating device C and the corner regulating device X are returned to the normal state. The cardboard box A into which the bag-shaped sheet S has been inserted is conveyed in the direction of arrow a in FIG. 1 to complete a series of automatic sheet insertion operations, and thereafter, similarly, the subsequent cardboard boxes A, A at the sheet insertion position β. The bag-shaped sheets S are automatically inserted sequentially into.

In short, the inner nozzle 113 for blowing air from above into the bag-shaped sheet S when the bag-shaped sheet S is opened by the opening device G and during the suction operation of the vacuum suction pads 59 and 60 is provided. Since at least the inner nozzle 113 described above was configured to fill substantially the entire inside of the bag-shaped sheet S with air and move the above-described sheet insertion device H downward, the air was filled to every corner of the bag-shaped sheet S. In this state, the above-described sheet insertion device H, more specifically, the sheet insertion frame 80 moves down.
Has the effect that the bag-shaped sheet S can be inserted into the cardboard box A satisfactorily. Furthermore, sheet insertion
At the same time as inserting the bag-like sheet S by the device H,
When the bag S is inserted into the box A,
Device P is in the sheet and the finger is
Directed air is blown out, so simultaneous with insertion of bag-shaped sheet S
Then, the bag-shaped sheet S is securely brought into close contact with the cardboard box A.
be able to. In addition, air is blown out under the above conditions
Therefore, it is possible to obtain sufficient action even with relatively weak wind power.
At the same time, since the air is directed to the side,
Without pulling in the folded part of the sheet S,
A good bag-like sheet can be reliably inserted and adhered.

In the correspondence between the configuration of the present invention and the above-described embodiment, the opening case of the present invention corresponds to the opening device G, and similarly, the sheet inserting means is the sheet inserting device H
The air nozzle corresponds to the inner nozzle 113 in the air nozzle device P, and the opening case corresponds to the cardboard box A, but the present invention is not limited to the configuration of the above-described embodiment.

For example, when the inner nozzle 113 blows air, the upper end of the sheet S is moved downward from the substantially fully opened state of the bag-shaped sheet S by the downward movement of the sheet insertion frame 80 so that the vacuum suction pad 5
Needless to say, it may be performed continuously until immediately before the separation from 9,60.

[Brief description of the drawings]

FIG. 1 is a front view showing an automatic sheet inserting apparatus according to the present invention.

FIG. 2 is a side view of the automatic sheet insertion device.

FIG. 3 is a plan view showing an arrangement state of a sheet regulating device and a corner regulating device.

FIG. 4 is a side view of a sheet regulating device and a corner regulating device.

FIG. 5 is a plan view of the sheet regulating device in a normal state.

FIG. 6 is a plan view of the sheet regulating device in a regulated state.

FIG. 7 is a plan view of the corner regulating device in a normal state.

FIG. 8 is a plan view of the corner regulating device in a regulated state.

FIG. 9 is a sectional view of a perforating device and a shearing device.

FIG. 10 is a sectional view taken along line YY of FIG. 9;

FIG. 11 is a sectional view of the block taken along the line ZZ in FIG. 9;

FIG. 12 is an explanatory diagram of a bag-shaped sheet pressing operation.

FIG. 13 is an explanatory diagram of a punching operation.

FIG. 14 is an explanatory diagram of a needle return operation.

FIG. 15 is an explanatory diagram of a sheet shifting operation.

FIG. 16 is a plan view of the opening device.

FIG. 17 is an explanatory diagram of a sheet suction operation by the apparatus.

FIG. 18 is an explanatory diagram of a normal position advance operation of the seat.

FIG. 19 is an explanatory diagram of a sheet opening operation.

FIG. 20 is an explanatory diagram of a sheet stretching operation.

FIG. 21 is a sectional view showing a mounting structure of a vacuum suction pad.

FIG. 22 is a front view of a vacuum suction pad.

FIG. 23 is a longitudinal sectional view of the center part of FIG. 22.

FIG. 24 is an explanatory view showing an example of a suction area increasing unit.

FIG. 25 is a sectional view taken along line QQ of FIG. 24;

FIG. 26 is an explanatory view showing another example of the suction area increasing means.

FIG. 27 is a sectional view taken along line RR of FIG. 26;

FIG. 28 is an explanatory diagram showing a sheet suction state by a vacuum suction pad.

FIG. 29 is a sectional view of the sheet stretching device.

FIG. 30 is a front view of the sheet stretching apparatus.

FIG. 31 is an explanatory diagram of a sheet stretching operation by a rotating finger.

FIG. 32 is a side view showing a related structure of the sheet insertion device and the folding device with respect to the cardboard box.

FIG. 33 is an explanatory view showing a stage in which the sheet insertion frame is being lowered.

FIG. 34 is an explanatory view showing an insertion operation of the bag-like sheet.

FIG. 35 is an explanatory view showing the folding operation of the rim of the bag-shaped sheet.

FIG. 36 is an explanatory view showing a returning operation of raising the sheet insertion frame.

FIG. 37 is an explanatory diagram of an air nozzle device.

[Explanation of symbols]

 A: Corrugated cardboard box S: Bag-shaped sheet G: Opening device H: Sheet insertion device P: Air nozzle device 59, 60: Vacuum suction pad 113: Inner nozzle

Claims (1)

(57) [Scope of request for utility model registration] 1. A and opening means for the bag-shaped sheet upper end by contact and separate the front and rear of the vacuum suction pad for sucking opening the bag-like sheet, and placing the opening case below the apertured bag-like sheet,
The sheet insertion frame for inserting the bag-like sheet into the opening case,
Sheet insertion means for reciprocating within the opening case from above the bag-like sheet to insert the bag-like sheet into the opening case , wherein the upper edge of the bag-like sheet is held by the vacuum suction pad of the opening means.
Open the bag-like sheet with the sheet insertion frame of the sheet insertion means.
A sheet insertion device for inserting air into the opening case, wherein a plurality of air bubbles are directed sideways inside the bag-like sheet while the bag-like sheet is inserted into the opening case by the sheet insertion means. A sheet insertion device provided with an air nozzle having an injection hole formed therein and connected to a sheet insertion frame of the sheet insertion means.