JPH0526011Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Field of the invention This invention involves inserting a bag-like sheet made of resin such as a polyethylene sheet into an open case such as a cardboard box, paper box, or wooden box. The present invention relates to an apparatus for inserting a sheet into an open case, which folds the sheet outward from the rim of the box and holds the sheet in an open state.

(B) Background of the Invention Conventionally, as a device for inserting a sheet into an open case of the above-mentioned example, there is, for example, a device described in Utility Model Application No. 61-95107.

That is, a sheet winding section that winds a long and completely continuous bag-like sheet without perforations, a sheet feeding means for guiding the sheet of the sheet winding section above the open case, and the sheet feeding means. a fixed receiving part located at the lower part of the tip and holding the sheet from the sheet feeding means by suction; and a cutting opening that comes into contact with and separates from the fixed receiving part to cut the sheet and to adsorb and open the cut bag-shaped sheet. a sheet inserting means for inserting the sheet into the case by reciprocating above the opened bag-like sheet and inside the open case; and a folding means for folding the edge of the sheet outward from the edge of the open case. A device for inserting a sheet into an open case, comprising means for inserting a sheet into an open case, and a sealing portion for heat-sealing the bag-like sheet is disposed in front of the cutting opening.

However, the conventional device described above has the following problems.

That is, the above-mentioned bag-like sheet adheres tightly due to the reasons described below, so when opening the bag-like sheet with the above-mentioned cutting opening, there was a problem that a good opening condition could not be obtained.

The following four points can be considered as reasons why the above-mentioned bag-like sheets stick together.

Firstly, the adhesion due to static electricity that acts between the top and bottom of the bag-like sheet.Secondly, when the bag-like sheet is wound into a roll, the air inside the sheet is forced out and a vacuum state is created.Thirdly, the roll. The bag-shaped sheet is mechanically compressed by the feed roll when the sheet is wound and the sheet is fed, and a similar pressure force is also applied during sheet forming.Fourthly, substances generated from the film-containing substances The point where the upper and lower sheets stick together due to their unique adhesive properties.

Due to these reasons, the bag-shaped sheets stick together, making it impossible to obtain a good sheet opening condition at the cutting opening, which poses the problem of interfering with the operation of inserting the sheet into the opening case by the sheet insertion means described above. was.

(c) Purpose of the invention The purpose of this invention is to provide a device for inserting a sheet into an open case that can obtain a good opening condition of the bag-like sheet by using a unique configuration that introduces air from the outside into the bag-like sheet. shall be.

(d) Structure of the invention This invention is an open case in which a completely continuous bag-like sheet wound around a winding part is fed out by a feeding device, and the fed-out bag-like sheet is cut open and inserted into an open case. A sheet insertion device for a bag-like sheet, which includes a perforating means for punching a small-diameter air introduction hole in a bag-shaped sheet in the middle of a sheet conveyance path between the winding section and a cutting opening, and A sheet insertion device into an open case is provided with a shifting means for relatively shifting left and right.

(e) Effects of the invention According to this invention, small-diameter air introduction holes are made in the bag-like sheet by the above-mentioned perforation means, so that external air is introduced into the bag-like sheet through these introduction holes, and the sheet becomes easier to open.

Moreover, rather than simply drilling air inlet holes, the top and bottom of the bag-shaped sheet are relatively shifted left and right using a shifting means to form a layer of externally introduced air within the sheet, so that when the bag-shaped sheet is opened, the sheet opens easily, resulting in the effect of achieving a good opening condition.

(F) Embodiment of the invention An embodiment of the invention will be described below in detail based on the drawings.

The drawings show an automatic sheet insertion device into an open case, and in FIGS. 1 and 2, this automatic sheet insertion device moves a cardboard box A as an open case from a standby position α to a sheet insertion position β.
A box conveying device B conveys the cardboard box A at the sheet insertion position β mentioned above.
A stopper device C that stops the sheet S, a winding section D that winds a long and completely continuous bag-like sheet S without perforations, and a winding section D that winds the sheet S in the winding section D described above at a sheet insertion position β.
a sheet feeding device E that guides and conveys the cardboard box A above; a cutting device F that cuts the sheet S to a predetermined length corresponding to the size of the cardboard box A; and a vacuum suction of the cut bag-shaped sheet S. An opening device G that opens the bag-like sheet S and reciprocates between the opened bag-like sheet S and inside the cardboard box A serving as an opening case.
Sheet insertion device H that inserts a sheet into a cardboard box A
, a folding device J that folds the edge of the sheet S outward from the edge of the upper opening of the cardboard box A, and heat welding the bag-like sheet S at a midway point between the above-mentioned winding section D and the cutting device F. Sheet welding equipment K
and a punching device L for punching small-diameter air introduction holes in the bag-like sheet S at the rear of the sheet welding device K.
, a shifting device M that relatively shifts the top and bottom of the bag-like sheet S from side to side, and a sheet tensioning device N that stretches the upper end of the bag-like sheet S opened by the aforementioned opening device G and straightens it into a square shape.
It is equipped with

The aforementioned box conveying device B has a conveyor frame 2 mounted on a base 1, and a roll conveyor 5 is disposed between the front and rear side plates 3 and 4 on this conveyor frame 2, and the cardboard boxes A are moved along the arrow a in FIG. It is configured to be conveyed in the direction.

Cardboard box A transported by the above-mentioned box transport device B
A stopper device C for stopping the sheet at the sheet insertion position β shown in FIG. 1 is constructed as shown in FIGS. 3 to 6.

That is, first and second rotary actuators 7 and 8 (air swing motors) are arranged at a predetermined interval on the main body housing 6 side, and the rotation of each of these rotary actuators 7 and 8 is axis 9,
A first stopper arm 11 and a second stopper arm 12 are fitted to the stopper arm 10, and the free ends of each of these stopper arms 11 and 12 have a first stopper 14 and a second stopper 14 with rubbers 13 and 13 attached to the cardboard box contact surface.
A stopper 15 is arranged so that its position can be adjusted.

Further, a reference stopper 16 that forms a reference surface for stopping the cardboard box A is provided between the rotary actuators 7 and 8, and an L-shaped plate 17 is fixed onto this stopper 16.

Furthermore, the cardboard box A is placed on the reference stopper 16 mentioned above.
A fixed frame 18 is disposed on opposite sides of the fixed frame 18, and a first air cylinder 19 is attached to the outer surface of the fixed frame 18.
A third stopper 20 for pressing the cardboard box A against the reference stopper 16 is attached to the tip of the piston rod 9, and a guide rod 21 protruding from the back of the third stop 20 can be slid into a guide cylinder 22 on the back of the fixed frame 18. is inserted into.

Moreover, the above-mentioned first stopper 14, second stopper 15, third stopper 20 and reference stopper 16
The height of the upper L-shaped board 17 is the height of the box body 23 and both the inner and outer flaps 24, 24, . . .
These flaps 24 are set in positions where they are held upright, straddling the fold 25 between them.

Then, the above-mentioned stopper device C firstly
As shown in the figure, the first stopper arm 11 is rotated in the direction of arrow b by the drive of the first rotary actuator 7, and the cardboard box that has been transported in the direction of arrow a on the roll conveyor 5 of the box transport device B is A at the first stopper 14 at the sheet insertion position β described above.
to stop it.

Next, as shown in FIG. 4, the second rotary actuator 8 is driven to rotate the second stopper arm 12 in the direction of arrow c, and the second stopper 15 presses the cardboard box A toward the first stopper 14. do.

Next, as shown in FIG. 6, the first air cylinder 1
9 is projected, and the third stopper 20 is used to move the cardboard box A to the reference stoppers 16 and L.
Press it against the dial 17 to hold it in the normal position.

At this time, each of the first to third stoppers 1 described above
4, 15, 20 and the L-shaped plate 17 contact the upper and lower sides of the fold 25 at the same time, the upper and lower flaps 24 of the cardboard box A are prevented from opening outward, and each of these flaps 24 is prevented from opening outward. Flap 24... is box body 2
3, it is held upright approximately straight or less than the nominal dimension.

By the way, the winding section D for winding the long and completely continuous bag-like sheet S without perforations is constructed as shown in FIG.

That is, a raw fabric roll 27 is attached to the rear lower part of the main body housing 6 via a roll holder 26, and a completely continuous bag-shaped long sheet S without perforations is wound around the winding core 28 of this raw fabric roll 27. It is composed by rotating it.

In this embodiment, a polyethylene sheet is used as the sheet S mentioned above.

As shown in FIG.
9, opposite rollers 30, 30, tension roller 3
1, a guide roller 32, opposing rollers 33, 33, and a drive motor (not shown).

The above-mentioned roller 3 as the middle part of the sheet conveyance path
The sheet welding device K heat-welds the bag-shaped sheets S between 2 and 32. The sheet welding device K has a heater 35 with an internal nichrome heating wire (not shown) arranged above the pedestal 34 on the lower surface of the sheet S, and Heater 35
is connected to the piston rod of the second air cylinder 36.

Then, in the next step of the sheet shifting operation described later, the piston rod moves downward as described above.
By pressing the heater 35 heated to 150 to 200° C. against the sheet S for about 0.3 to 0.8 seconds, the bag-like sheet S is thermally welded to form a linear welded portion 37 (see FIG. 20).

A punching device L for punching small-diameter air introduction holes in the bag-like sheet S at the rear of the sheet welding device K.
In this embodiment, the device M and the device M for relatively shifting the bag-like sheet S vertically and horizontally are constructed as an integrated unit.

That is, as shown in FIGS. 1, 7 to 9, a fixed channel 38 is provided above the bag-like sheet S orthogonally to the conveyance direction (arrow d direction) of the bag-like sheet S.
, and two units 39 and 40 are arranged on the lower surface of this fixed channel 38 at a predetermined interval.

Since each of these units 39 and 40 has a symmetrical structure, one unit 40 will be described in the following description.

As shown in FIGS. 7 to 9, the above-mentioned unit 40 has inverted L-shaped mounting pieces 41, 41 fixed to the lower surface of the fixed channel 38 in a spaced-apart manner, and two upper and lower parts of these mounting pieces 41, 41, respectively. Sliding guide tube 4 in place
2... and the opposing sliding guide tube 4
Rods 43 and 43 are slidably inserted between 2 and 42, respectively.

Further, an outer block 45 is fixed to each of the above-mentioned upper and lower rods 43, 43 using screws 44, and an inner block 47 that is vertically slidable is disposed in a concave guide groove 46 of the outer block 45.

A concave stopper 48 with a predetermined depth is formed on the upper part of this inner block 47, while a rubber 4 is formed on the lower surface of the inner block 47 facing the seat S.
9 is attached and fixed.

Then, a third air cylinder 50 for raising and lowering the inner block and a fourth air cylinder 51 for raising and lowering the needle are fixed to the top surface of the outer block 45 with a bottle, and the lower end of the piston rod of the third air cylinder 50 is fixed to the top surface of the above-mentioned inner block 47. A needle 53 having a solid cross section is attached to the lower end of the piston rod of the fourth air cylinder 51 via a connecting plate 52.

Moreover, a fifth air cylinder 54 that slides the blocks 45 and 47 together is bolted to the outer surface of the mounting piece 41, and the piston rod tip of the fifth air cylinder 54 is attached to the side surface of the outer block 45. The fourth air cylinder 51 and the needle 53 are screwed together to form a punching device L, and the other elements form a shifting device M, respectively.

The punching operation and shifting operation by each of the above-mentioned devices L and M are as follows.

First, from the normal state shown in FIG. 7, the third and fourth 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. Then, the bag-like sheet S is fixed between a receiving member (not shown).

At this time, the third air cylinder 50 completes its descent, but the fourth air cylinder 51 moves to the concave stopper 48.
The needle 53 is moved further downward than the lower surface of the inner block 47 in the lowered position as shown in FIG. At 53, small-diameter air introduction holes 55, so-called needle holes, are formed through the bag-shaped sheet S.

Note that the position where the air introduction hole 55 is bored corresponds to a predetermined portion of the sheet that is folded back against the cardboard box A.

Next, from the state shown in FIG. 11, only the piston rod of one of the fourth air cylinders 51 is moved back, and the needle 53 is returned to the normal position as shown in FIG.

Next, from the state shown in FIG. 12, the fifth air cylinder 54 is driven to move both blocks 45 and 47 into
When moved horizontally along with the book rods 43, 43,
As shown in FIG. 13, the top and bottom of the bag-shaped sheet S can be relatively shifted left and right.

In this way, the air introduction hole 55 is made in the sheet S using the needle 53 described above, and external air is introduced between the upper and lower sheets S, and the upper and lower sheets S are shifted by the shifting device M, so that the inside of the sheet S is Forms a layer of externally introduced air.

After that, the above-mentioned third air cylinder 50 and fifth air cylinder
By the return movement of the air cylinder 54, each device L, M is returned from the state shown in FIG. 13 to the normal state shown in FIG. 7. This kind of movement is performed by the left and right units 3.
9, 40 simultaneously and symmetrically.

By the way, the above-mentioned bag-like sheet S is put into a cardboard box A.
A cutting device F that cuts to a predetermined length according to the shape of
As shown in FIG. 2, the opposing rollers 33, 33
A cutting blade 56 that is driven in conjunction with a shedding device G, which will be described later, is disposed below the opening device.

Note that, of course, a sheet fusing cutter using a hot wire or the like may be used in place of the cutting blade 56.

The opening device G that clamps the bag-like sheet S fed out from the above-mentioned opposing rollers 33, 33 and opens the bag-like sheet S by vacuum suction after being cut by the cutting blade 56 is shown in FIGS. It is constructed as shown in FIG.

That is, the front frames 57 are driven toward and away from each other.
and a rear frame 58 are provided in parallel, and a vacuum suction device (not shown) is connected to a vacuum suction device (not shown) via a negative pressure suction pipe, so-called vacuum hose (not shown), at the opposing portion of each of these frames 57, 58. Pads 59 and 60 are installed.

The above-mentioned front frame 57 is fixed to the tip of the piston rod 62 in the sixth air cylinder 61, which has a relatively long stroke, and
The guide rods 63, 63 attached to both sides of 7,
It is slidably inserted into fixed guide tubes 64, 64 on the main body housing 6 side.

Spacers 65 and 66 of different lengths are attached to both rear sides of the rear frame 58, respectively, and a swash plate 67 is stretched between the spacers 65 and 66.

The tip of a piston rod 69 of a seventh air cylinder 68 disposed perpendicularly to this swash plate 67 is connected to the above-mentioned swash plate 67, and guide rods 70 are attached to both sides of this swash plate 67. ,7
0 to the fixed guide cylinder 71 on the main body housing 6 side,
71 so as to be slidable.

Therefore, if the opening angle of the seventh air cylinder 68 with respect to the perpendicular line ν of the rear frame 58 is θ, and the full stroke of the piston rod 69 of the air cylinder 68 is (see FIG. 16), then this seventh air cylinder 68 When the vacuum suction pad 60 is driven forward, it is configured to shift the pad 60 left and right in the drawing by tanθ.

The above-mentioned opening device G is the 14th opening device in the normal state.
As shown in the figure, the front frame 57 and the rear frame 58 are spaced apart 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 shown in FIG.
When the bag-shaped sheet S of a predetermined length is delivered to the front of the vacuum suction pads 60, 60 from between 3 and 33 (see FIG. 2), the piston rod 62 of the sixth air cylinder 61 moves in the direction of arrow e. and front frame 5
7 is brought close to the rear frame 58 as shown in FIG. 15, and the upper end of the bag-shaped sheet S is sucked by the vacuum suction pads 59, 60 of both frames 57, 58.

During the suction described above, the cutting blade 56 cuts the bag-shaped sheet S above the suction portion.

From the state shown in FIG. 15, the sixth and seventh air cylinders 61 and 68 are driven, and by the full stroke of one of the seventh air cylinders 68, the cut bag-like sheet S is transferred to the cardboard box A as shown in FIG. Move it forward to a position corresponding to one side of the reference plane.

Next, from the state shown in FIG. 16, only the other sixth air cylinder 61 is advanced, and the vacuum suction pad 59,
At 60, the upper end of the bag-shaped sheet S that has been sucked is opened as shown in FIG.

Next, under the condition shown in FIG.
are inserted into the four inner corners of the upper end of the opened bag-shaped sheet S, and the sheet S is stretched in a rectangular shape as shown in FIG.

Here, when changing from the state shown in FIG. 15 to the state shown in FIG. 16, the vacuum suction pads 60, 60 attached to the rear frame 58 are shifted to the left by . This operation creates a state in which outside air is more likely to flow in, making the next opening operation easier.

A sheet stretching device N that stretches the upper end of the bag-shaped sheet S opened by the opening device G described above to form a rectangular shape is constructed as shown in FIGS. 19 to 21.

That is, the third and fourth rotary actuators 7 are arranged apart from each other above the opening position of the bag-like sheet S.
2, 73 (air swing motors) are provided, and substantially L-shaped rotating fingers 75 are fitted to drive shafts 74 protruding from the front and rear of each of these rotary actuators 72 and 73, respectively. Fixed.

Then, as shown in FIG. 20, the above-mentioned opening device G
When the bag-shaped sheet S after cutting is opened, the rotary actuators 72 and 73 described above are driven and the drive shafts 74 are rotated 90 degrees in the direction of the arrow f, so that the state shown in FIG. As shown, the rotating finger 75...
are inserted into the four corners of the upper end opening of the bag-like sheet S, and the four corners of the bag-like sheet S are stretched in all directions with these four rotating fingers 75 to form a rectangular shape, and the bag-like sheet S is opened. To appropriately correct the upper end posture of a bag-like sheet S.

By the way, the sheet insertion device H that reciprocates between the opened bag-like sheet S and inside the cardboard box A serving as an open case to insert the sheet S into the cardboard box A is constructed as shown in FIG. ing.

That is, a support 76 is installed at the front upper part of the main body housing 6, and a bracket 77 is attached to this support 76.
An eighth air cylinder 79 for raising and lowering is connected via 78.

A sheet insertion frame 80 is fixed to the tip of the piston rod of the eighth air cylinder 79 to constitute the sheet insertion device H described above.

The sheet insertion frame 80 described above is shown in FIGS. 22 to 26.
As shown in the figure, a total of four frame rods 81 corresponding to the four corners of the opened cardboard box A are connected to each other by upper and lower connecting members 82 and 83 via a predetermined lifting space, and the above-mentioned The piston rod of the air cylinder 79 reciprocates between the opened bag-shaped sheet S (see Fig. 22) and the opened inside of the cardboard box A (see Fig. 25) to move the sheet S. Insert into cardboard box A.

The above-mentioned four frame rods 81 in total are equipped with folding actuators 8 whose vertical positions can be adjusted by manual operation.
4... are attached to constitute the above-mentioned folding device J.

Each of these folding actuators 84... has its folding rod 8 as shown in FIGS. 24 and 25.
5..., the upper edge of the bag-like sheet S inserted into the cardboard box A is connected to the flap 2 of the cardboard box A.
4...An actuator for folding back outward from the lip at the upper end.

The operations of the sheet insertion device H and folding device J described above are as follows.

First, the bag-shaped sheet S, which has been opened by the aforementioned opening device G and whose upper end posture has been corrected by the sheet tensioning device N, is lowered by the sheet insertion frame 80 located above the sheet S, as shown in FIG. After passing through the state shown in FIG. 23, it is inserted into the open cardboard box A as shown in FIG. 24.

A bag-like sheet S inserted into this cardboard box A
The upper end of the actuator 84 is expanded outward into an inverted V-shape by the tapered guide surface 86 at the lower end.

Next, when the folding rods 85 of the above-mentioned folding actuators 84 are projected from the state shown in FIG. 24 as shown by the arrows in FIG. are folded outward from the upper edge of each flap 24,
Maintain the open state.

Next, as shown in FIG. 26, the sheet insertion frame 80 is lifted away from the cardboard box A by the return movement of the eighth air cylinder 79, and then the box holding by the stopper device C is released and the box is transported. The roll conveyor 5 of the device B conveys the cardboard box A after the sheet insertion is completed in the direction of the arrow a in FIG.

Note that 87 in FIG. 1 is a stopper for temporarily stopping the cardboard box A at the standby position α, and this stopper 87 is operated by the ninth air cylinder 88.

The illustrated embodiment is configured as described above,
The action will be explained below.

First, as shown in FIGS. 1 and 2, the above-mentioned box conveying device B conveys an upwardly opening corrugated box A with both the inner and outer flaps 24 upright to the bag-like sheet insertion position β, and the stopper device C Position the cardboard box A at a predetermined position.

At this time, as shown in FIGS. 3 to 6, each flap 24 of the cardboard box A stands up on the cardboard box body 23 in a substantially straight manner or less than the nominal dimension.

Next, the bag-shaped sheet S is conveyed by a predetermined length by a sheet feeding device E shown in FIG.

Next, as shown in FIGS. 7 to 13, by operating the punching device L and the shifting device M, the air introduction holes 55 are punched in the bag-like sheet S, and the top and bottom of the bag-like sheet S are relatively shifted. External air is introduced into the seat S.

Next, the sheet welding device K shown in FIG. form.

Next, the perforated bag-like sheet S is fed to the front of the vacuum suction pads 60, 60 in the opening device G by a length corresponding to the shape of the cardboard box A.

Next, the above-mentioned opening device G is driven from the state shown in FIG. 14 to the state shown in FIG. Cut the sheet S above the section.

Next, from the state shown in FIG. 15 to the state shown in FIG. 16, the bag-like sheet S after cutting is opened by the above-mentioned opening device G as shown in FIG. 17. When the bag-shaped sheet S reaches the state shown in FIG. 16, the leftward movement of the vacuum suction pads 60, 60 of tan θ further introduces outside air into the bag, making it easier to open the bag.

Next, as shown in FIGS. 18 and 21, the rotary fingers 75 of the sheet tensioning device N are inserted into the four corners of the upper end of the opened bag-like sheet S, and the vacuum suction pads 59 and 60 The above-mentioned four corners where the vacuum suction force is not sufficiently applied are pulled in all directions to correct the posture of the top end of the sheet into a rectangular shape.

Next, as shown in FIGS. 22 to 26, the sheet inserting device H and the folding device J are driven to insert the bag-like sheet S into the cardboard box A opened at the sheet insertion position β, and to Fold back the upper end opening of the flap 2 with the actuator 84.
After the folding is completed, the sheet inserting device H and the folding device J are moved back to the normal position shown in FIG. 22. Note that the above-mentioned air introduction hole 55 is located on the outside of this folded portion.

Next, the cardboard box A is stopped by the stopper device C mentioned above.
The stop and hold state at the sheet insertion position β is released, and the cardboard box A into which the bag-like sheet S has been inserted is conveyed in the direction of the arrow a in FIG. , the bag-shaped sheets S are automatically inserted in sequence into each of the subsequent cardboard boxes A, A, . . . at the sheet insertion position β.

In short, the above-mentioned punching device L punches the small-diameter air introduction hole 55 in the bag-like sheet S before opening the bag-like sheet S, so that external air is introduced into the bag-like sheet S through the introduction hole 55. This makes the sheet S easier to open.

Moreover, in addition to simply drilling the air introduction holes 55, the above-mentioned shifting device M relatively shifts the top and bottom of the bag-shaped sheet S to the left and right, thereby forming a layer of externally introduced air within the sheet S. When opening the bag-shaped sheet S, the sheet S can be easily opened and a good opening state can be obtained.

In terms of the correspondence between the structure of this invention and the embodiment described above, the feeding device of this invention corresponds to the sheet feeding device E of the embodiment, and the opening case corresponds to the cardboard box A, and the cutting opening corresponds to the sheet feeding device E of the embodiment. The part corresponds to the cutting device F and the opening device G, and the punching means is a punching device K equipped with a needle 53.
Although the shifting means corresponds to the shifting device M, the present invention is not limited to the configuration of the above-described embodiment.

For example, in addition to the above-mentioned cardboard box A, a paper box, a wooden box, or the like can be used as the open case.

Furthermore, in place of the air drive means such as an air cylinder or a rotary actuator, it goes without saying that a fluid cylinder such as a hydraulic cylinder or a solenoid may be used when the reciprocating stroke is small.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a front view of the automatic sheet insertion device, Fig. 2 is a side view of the automatic sheet insertion device, Fig. 3 is a plan view of the stopper device, and Fig. 4 is a stopper device. An explanatory diagram of the device, FIG. 5 is a view along the line X-X in FIG. 3, FIG. 6 is an explanatory diagram when positioning of the cardboard box is completed by the stopper device, FIG. 7 is a sectional view of the punching device and the shifting device, 8 is a sectional view taken along the Y-Y line in FIG. 7, FIG. 9 is a sectional view of the block along the Z-Z line in FIG. Fig. 11 is an explanatory diagram of the punching operation, Fig. 12 is an explanatory diagram of the needle return operation, Fig. 13 is an explanatory diagram of the sheet shifting operation, Fig. 14 is a plan view of the shedding device, and Fig. 15 is a sheet adsorption by the same device. An explanatory diagram of the operation, Fig. 16 is an explanatory diagram of the sheet forward movement to a fixed position, Fig. 17 is an explanatory diagram of the sheet opening operation, Fig. 18 is an explanatory diagram of the sheet tensioning operation, and Fig. 19 is an explanatory diagram of the sheet tensioning device. cross-sectional view, second
Figure 0 is a front view of the sheet tensioning device, Figure 21 is an explanatory diagram of the sheet tensioning operation by the rotary finger, Figure 22
The figures are a side view showing the structure of the sheet insertion device and the folding device related to the cardboard box, FIG. 23 is an explanatory view showing the middle stage of the descent of the sheet insertion frame,
The figure is an explanatory diagram showing the insertion operation of the bag-shaped sheet, No. 25.
The class is an explanatory diagram showing the folding operation of the edge of the bag-shaped sheet,
FIG. 26 is an explanatory diagram showing the upward return operation of the sheet insertion frame. A... Cardboard box, D... Winding section, E... Sheet feeding device, F... Cutting device, G... Opening device,
L: perforation device, M: shifting device, S: bag-shaped sheet, 55: air introduction hole.

Claims (1)

[Scope of claim for utility model registration] A completely continuous bag-like sheet wound around a winding part is fed out by a feeding device, and the fed-out bag-like sheet is cut open and inserted into an open case. The sheet insertion device includes a perforating means for punching a small diameter air introduction hole in the bag-shaped sheet in the middle of the sheet conveyance path between the winding section and the cutting opening; A device for inserting a sheet into an open case, comprising a shifting means for shifting the sheet relative to the opening case.