JPH0524508U - Sheet insertion device - Google Patents

Abstract

(57) [Abstract] [Purpose] By providing an air nozzle that blows air from above in the bag-shaped sheet, air is blown into the bag-shaped sheet opened by the opening device, and The whole is filled with air to facilitate the insertion of the bag-shaped sheet into the opening case by the sheet insertion device. [Structure] Opening means G that opens the upper end of the cut bag-shaped sheet S with front and rear vacuum suction pads 59 and 60, and reciprocates between the opening of the opened bag-shaped sheet S and the inside of the opening case A to form a sheet. A sheet inserting device including a sheet inserting means H for inserting S into the opening case A, wherein the bag-like sheet is opened when the bag-like sheet is opened by the opening means G and during the suction action of the vacuum suction pads 59 and 60. An air nozzle P for blowing air from above is provided in the sheet S, and at least the air nozzle P is provided.
Is configured so that the bag inserting sheet is filled with air to move the sheet inserting means H downward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This device, for example, inserts a synthetic resin bag-like sheet such as a polyethylene sheet into an opening case such as a cardboard box and a paper box, and folds the bag mouth edge from the box mouth edge to the outside to open it. A sheet inserting device for holding.

[0002]

[Prior Art]

 Conventionally, as a sheet inserting device into the opening case of the above-mentioned example, there is a device having the following structure, for example. That is, a sheet winding unit that winds a long continuous bag-shaped sheet without perforations, a sheet feeding unit that guides the sheet of the sheet winding unit above the opening case, and the sheet feeding unit. A fixed receiving portion located at the lower end of the means for adsorbing and holding the sheet from the sheet feeding means, and contacting and separating from the fixed receiving portion to cut the sheet and also to adsorb the cut bag-like sheet to open it. The cutting opening, the sheet insertion means for reciprocating the opening of the bag-shaped sheet and the inside of the opening case to insert the sheet into the case, and the edge of the sheet outward from the edge of the opening case. A sheet inserting device into an opening case, which is provided with a folding back means, and has a seal portion for heat-sealing the bag-like sheet disposed in front of the cutting opening portion.

However, the above conventional device has the following problems. That is, when the bag-shaped sheet after cutting is adsorbed and opened by the above-mentioned cutting opening, due to the sheet adhesion at the sheet winding part, especially the lower part of the bag-shaped sheet in the vicinity of the heat seal part is If the above-mentioned sheet inserting means is moved downward under such an insufficient opening state, the bag-like sheet cannot be properly inserted into the opening case. .

[0004]

[Problems to be solved by the device]

 In this invention, by providing an air nozzle for blowing air from above in the bag-shaped sheet, the air is blown into the inside of the bag-shaped sheet opened by the opening means, and the air is blown almost entirely in the bag-shaped sheet. It is an object of the present invention to provide a sheet insertion device that can be filled with the above-mentioned sheet insertion means and can satisfactorily insert the bag-shaped sheet into the opening case.

[0005]

[Means for Solving the Problems]

 This invention is to reciprocate the opening means for opening the upper end of the bag-shaped sheet after cutting with the front and rear vacuum suction pads and the upper part of the opened bag-shaped sheet and the inside of the opening case to move the sheet into the opening case. And a sheet inserting means for inserting the sheet into the bag-shaped sheet by means of blowing air from above into the bag-shaped sheet when the bag-shaped sheet is opened by the opening means and during the suction action of the vacuum suction pad. The sheet inserting device is provided with an air nozzle to be attached, and is configured to move the sheet inserting means downward by filling substantially the entire air in the bag-like sheet with the air nozzle.

[0006]

[Effect of the device]

 According to this invention, when the bag-shaped sheet is opened by the above-mentioned opening means and during the suction action of the vacuum suction pad, the above-mentioned air nozzle operates, and the air from this air nozzle is blown into the inside of the bag-shaped sheet. Therefore, it is possible to fill all the inside of the bag-shaped sheet with air, and in this state, the above-mentioned sheet insertion means moves downward, so that the insertion of the bag-shaped sheet into the opening case by the sheet insertion means is favorable. There is an effect that can be done to.

[0007]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show an automatic sheet inserting device. In FIGS. 1 and 2, the automatic sheet inserting device is a box conveying device B that conveys a cardboard box A as an opening case from a standby position α to a sheet inserting position β, and the above-mentioned sheet. A stopper device (not shown) for stopping the cardboard box A at the insertion position β, a winding part D for winding a long continuous perforated sheet-like sheet S, and the winding part described above. A sheet feeding device E that guides and conveys the sheet S of D above the cardboard box A at the sheet insertion position β, and a cutting device F that cuts the sheet S into a predetermined length corresponding to the size of the cardboard box A. An opening device G that vacuum-sucks the opened bag-shaped sheet S after opening and opens the bag-shaped sheet S, and reciprocates between the opened bag-shaped sheet S and the inside of the cardboard box A serving as an opening case to move the sheet S into the cardboard box. Insert in A A sheet insertion device H, a folding device J that folds the rim of the sheet S outward from the rim of the upper end opening of the cardboard box A, and the sheet S is inserted into the cardboard box by the above-described sheet insertion device H. A sheet restricting device C that prevents interference with the four corners (corner edges) of A, and a corner restricting device that corrects the four corners on the upper outer surface of the cardboard box A at right angles at the above-described sheet insertion position β. X, an air nozzle device P that blows air into the bag-shaped sheet S from above the bag-shaped sheet S opened by the above-described opening device G, and a midway portion between the winding part D and the cutting device F described above. In the sheet welding device K, the bag-shaped sheet S is heat-welded, the punching device L that punches a small-diameter air introduction hole in the bag-shaped sheet S in the rear of the sheet welding device K, Up and down to the left and right A shift device M for offsetting each other and a sheet tensioning device N for tensioning the upper end of the bag-like sheet S opened by the above-mentioned opening device G to straighten it into a square shape are provided.

In the above-described box transfer device B, the conveyor frame 2 is mounted on the base 1, and the roll conveyor 5 is arranged between the front and rear side plates 3 and 4 on the conveyor frame 2 so that the corrugated cardboard box A is shown in FIG. It is configured to be conveyed in the direction of arrow a.

The above-described sheet regulation device C and corner regulation device X are configured as shown in FIGS. 3 to 8. That is, a total of four brackets 6 are fixed to the front and rear side plates 3 and 4 on the conveyor frame 2 at predetermined intervals, and vertically adjustable poles 7 are attached to each of the brackets 6. Each block is attached and the block 8 is fixed to the upper end of each of these poles 7, and an inverted L-shape is provided through an adjustable shaft 9 ... With respect to each of these blocks 8 in the front-rear direction (left-right direction in FIG. 4). The base block 10 in the shape of a circle is arranged.

A total of four support frames 11, ... Are attached to the left and right of the upper horizontal plane between the front side base block 10 (the left side in FIG. 4) and the rear side (the right side in FIG. 4). The upper cylinder base 12 is vertically adjustably attached to the upper part between the support frames 11 and 11 through the long holes 11a and 11a, and the lower cylinder between the support frames 11 and 11 on the same side is provided with the long holes 11b and 11b. The lower cylinder base 13 is vertically adjustable.

A total of four sheet regulation blocks 16 ... Are attached to the piston rod tip of the air cylinder 14 attached to the center of the above-mentioned upper cylinder base 12 via the movable frame 15, and the above-mentioned sheet regulation device C is used. Is composed of.

The seat restraint device C is held at the retracted position shown in FIG. 5 in the normal state, but when the sheet S is inserted by the sheet inserter H, more specifically, immediately before the lowering of the sheet inserter H. By the drive of the air cylinder 14, the above-mentioned sheet restriction blocks 16 ... Are projected as shown in FIG. 6, and these four sheet restriction blocks 16 ... Wrap with the four corners of the cardboard box A when viewed from above, The bag-like sheet S is prevented from interfering with the corner edge of the cardboard box A. Here, the surface of the above-mentioned sheet restriction block 16 corresponding to the inside of the box is formed as a tapered surface 16a.

Further, a total of four corner regulation blocks 19 ... Are attached to the piston rod tip of the air cylinder 17 attached to the center of the lower cylinder base 13 via the movable frame 18, and the corner regulation device described above is attached. Makes up X.

The corner restricting device X is held in the retracted position shown in FIG. 7 in the normal state, but before the sheet S is inserted by the sheet inserting device H, the air cylinder 17 is driven to operate as described above. The corner regulation blocks 19 are projected as shown in FIG. 8, and the four corner regulation blocks 19 in total straighten each of the four corner portions on the upper outer surface of the cardboard box A. Here, the surfaces of the respective corner restriction blocks 19 corresponding to the inside of the box are formed as right-angled surfaces 19a. Further, in contrast to the corrugated box A in which both the inner and outer flaps 24 are erected on the box body 23 through the folds 25, in this embodiment, the corners of the flaps 24 are squared by the above-mentioned corner regulation blocks 19. It is configured to be corrected. In FIGS. 3, 5, 6, 7, and 8, 20 is a guide rod attached to the movable frames 15 and 18, and 21 is a guide tube fixed to the cylinder bases 12 and 13.

By the way, a winding portion D for winding a long continuous bag-like sheet S without perforations is configured as shown in FIG. That is, an original fabric roll 27 is attached to the lower rear part of the main body housing 22 via a roll holder 26, and a completely continuous bag-like long sheet S without perforations is wound around a winding core 28 of the original fabric roll 27. It is configured by turning. In this embodiment, a polyethylene sheet is used as the above-mentioned sheet S.

As shown in FIG. 2, the sheet feeding device E for guiding the above-mentioned sheet S of the winding portion D to the upper side of the cardboard box A at the sheet insertion position β includes a guide roller 29, opposing rollers 30 and 30, tension rollers. The roller 31, the guide roller 32, the opposing rollers 33, 33, and a drive motor (not shown) are used.

A sheet welding device K for thermally welding the bag-shaped sheet S between the rollers 32 and 33 as a midway portion of the sheet conveying path is provided with a nichrome heating wire (not shown) above the receiving table 34 on the lower surface of the sheet S. The heater 35 is internally opposed to the heater 35, and the heater 35 is connected to the piston rod of the air cylinder 36.

Then, in the subsequent step of the sheet shifting operation, which will be described later, the heater 35 heated to 150 to 200 ° C. is pressed against the sheet S for about 0.3 to 0.8 seconds by the above-described piston rod downward movement. Then, the bag-shaped sheet S is heat-welded to form the linear welded portion 37 (see FIG. 30).

A punching device L that punches a small-diameter air introduction hole in the bag-shaped sheet S in the rear of the sheet welding device K and a device M that relatively shifts the bag-shaped sheet S vertically from side to side. In this embodiment, it is constructed as an integrated unit. That is, as shown in FIGS. 1 and 9 to 11, a fixed channel 38 is provided above the bag-shaped sheet S orthogonal to the conveying direction (direction of arrow d) of the bag-shaped sheet S, and the lower surface of the fixed channel 38 is provided on the lower surface of the fixed channel 38. Two units 39 and 40 are arranged at a predetermined interval. Since each of these units 39 and 40 has a bilaterally symmetrical structure, only one unit 40 will be described in the following description.

As shown in FIGS. 9 to 11, the above-described unit 40 has inverted L-shaped attachment pieces 41, 41 fixed to the lower surface of the fixed channel 38 so as to be spaced apart and opposed to each other. The sliding guide cylinders 42 ... Are fixed at two locations, and rods 43, 43 are slidably inserted between the opposing sliding guide cylinders 42, 42, respectively.

An outer block 45 is fixed to each of the upper and lower rods 43, 43 by using screws 44, and an inner block 47 that is vertically slidable is provided in a concave guide groove 46 of the outer block 45. is 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 the lower surface of the inner block 47 facing the sheet S.

Then, an air cylinder 50 for raising and lowering the inner block and an air cylinder 51 for raising and lowering the needle are fixed by bolts to the top surface of the outer block 45, and the lower end of the piston rod of the air cylinder 50 is fixed to the inner block 47. While fixed by screwing, 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.

Moreover, an air cylinder 54 that integrally slides the blocks 45 and 47 is integrally fixed to the outer surface of the mounting piece 41 by bolts, and the tip end of the piston rod of the air cylinder 54 is a side surface of the outer block 45. The air cylinder 51 and the needle 53 constitute the punching device L, and the other elements constitute the shifting device M.

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

At this time, one air cylinder 50 finishes lowering, but the other air cylinder 51 makes a stroke until the piston rod tip comes into contact with the bottom surface of the concave stopper 48, and the air cylinder 51 makes the above stroke. As shown in FIG. 13, the needle 53 is further moved downward by the lower surface of the inner block 47 in the lowered position, and the needle 53 forms a small diameter air introduction hole 55, a so-called needle hole, in the bag-like sheet S. 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 corrugated cardboard box A.

Next, only the piston rod of the other air cylinder 51 described above is returned from the state of FIG. 13 to return the needle 53 to the normal position as shown in FIG. Next, by driving the side air cylinders 54 from the state shown in FIG. 14 to move both blocks 45 and 47 together with the two upper and lower rods 43 and 43 laterally, the bag-like sheet S as shown in FIG. The upper and lower sides of can be shifted relative to the left and right.

As described above, the air introduction hole 55 is formed in the sheet S by the above-mentioned needle 53 to introduce the external air between the upper and lower sheets S, and the upper and lower sheets S are displaced by the displacement device M. , A layer of externally introduced air is formed in the sheet S. Then, by returning the above-mentioned one air cylinder 50 and the side air cylinder 54, each device L and M is returned from the state of FIG. 15 to the normal state shown in FIG. Such operations are simultaneously and symmetrically performed by the left and right units 39 and 40.

By the way, a cutting device F for cutting the bag-like sheet S into a predetermined length corresponding to the shape of the corrugated cardboard box A is, as shown in FIG. A cutting blade 56 that is driven in conjunction with an opening device G to be described later is arranged and configured. Of course, instead of the cutting blade 56, a sheet fusing cutter such as a heat wire may be used.

The opening device G that holds the bag-shaped sheet S fed from the above-mentioned opposing rollers 33 and 33 and is cut by the cutting blade 56 and then vacuum-sucks the bag-shaped sheet S to open the same. It is constructed as shown in FIGS. That is, a front frame 57 and a rear frame 58, which are driven to move toward and away from each other, are provided in parallel, and a vacuum suction tube (a vacuum hose (not shown)) is provided between opposing portions of these frames 57, 58 via a negative pressure suction tube. Vacuum suction pads 59, 60 communicating with a suction device (not shown) are attached.

The front frame 57 is fixed to the tip of the piston rod 62 of the air cylinder 61 having a relatively long stroke, and the guide rods 63 and 63 attached to both sides of the front frame 57 are attached to the main body housing 22 side. It is slidably inserted in the fixed guide cylinders 64, 64.

Spacers 65 and 66 having different lengths are attached to both rear sides of the rear frame 58, and a swash plate 67 is stretched between the spacers 65 and 66. The tip of the piston rod 69 of the air cylinder 68 arranged at a right angle to the swash plate 67 is connected to the swash plate 67, and guide rods 70 attached to both sides of the swash plate 67 are connected. , 70 are slidably inserted into fixed guide cylinders 71 1, 71 on the main body housing 22 side.

Therefore, when the opening angle of the air cylinder 68 with respect to the vertical line ν of the rear frame 58 is θ and the total stroke of the piston rod 69 of the air cylinder 68 is 1 (see FIG. 18), the air cylinder 68 is When the vacuum suction pad 60 is moved forward by driving, the pad 60 is configured to be displaced to the left in the drawing by l · tan θ. In the normal state of the opening device G, as shown in FIG. 16, the front frame 57 and the rear frame 58 are separated from each other 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. 16, when the bag-shaped sheet S having a predetermined length is fed from the space between the opposing rollers 33, 33 (see FIG. 2) to the front part of the vacuum suction pads 60, 60, the piston of the air cylinder 61 is moved. The rod 62 moves in the direction of arrow e to bring the front frame 57 close to the rear frame 58 as shown in FIG. 17, and the upper ends of the bag-like sheet S are fixed by the vacuum suction pads 59, 60 of both frames 57, 58. Adsorb.

At the time of the above-described suction, the cutting blade 56 cuts above the suction portion of the bag-shaped sheet S. The air cylinders 61 and 68 described above are driven from the state of FIG. 17, and the bag-shaped sheet S after cutting is corresponded to one side reference surface of the corrugated box A by the full stroke of one air cylinder 68 as shown in FIG. Advance to position.

Next, only the other air cylinder 61 is advanced from the state of FIG. 18 to open the upper end of the bag-like sheet S adsorbed by the vacuum suction pads 59, 60 as shown in FIG. Next, in the state shown in FIG. 19, the sheet tensioning device N, which will be described later, is driven, and the pivot fingers 75 thereof are engaged with the four corners in the upper end of the opened bag-like sheet S, as shown in FIG. The sheet S is stretched in a rectangular shape. Here, when the state of FIG. 17 is changed to the state of FIG. 18, since the vacuum suction pads 60, 60 attached to the rear frame 58 are displaced to the left by l · tan θ, the bag-like sheet S is displaced at this position. The operation makes it easier for the outside air to flow in, facilitating the next opening operation.

The vacuum suction pads 59 and 60 described above are configured as shown in FIGS. 21 to 28. That is, each of the vacuum suction pads 59, 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, and the suction block 91, that is, the sheet S side, is provided in the suction block 91. In addition to forming a cylindrical suction chamber 92 having an opening, a suction adjuster 93 is disposed in the suction chamber 92 so that the distance T between the suction end surface of the suction block 91 and the so-called depth can be variably adjusted.

In other words, 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 adjustment screw 94 projects outward from the back surface of the suction block 91. By disposing the adjusting nut 96 and the lock nut 97 in 94, the above-mentioned separation distance T is variably adjusted according to the material, rigidity and thickness of the bag-like sheet S used.

Further, the distance 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, a suction area increasing means for increasing the suction area of the sheet S is provided on the sheet suction side of the suction adjuster 93. As the suction area increasing means, a substantially cross-shaped groove 98 as shown in FIGS. 24 and 25 may be used, or as shown in FIGS. 26 and 27, a large number of through holes 100 are formed in the annular groove 99. The structure may be provided.

Furthermore, a rubber-based resin material 101 is joined to the outer surface of the suction block 91 on the sheet suction side, and the sheet S and the vacuum suction pads 59 and 60 are attached to each other during vacuum suction of the bag-shaped sheet S. The air-tightness between the sheets is secured, and when the bag-shaped sheet S is opened while shifting the cut portion of the sheet-shaped sheet S by the opening device G, the sheet S and the vacuum suction pads 59, 60 are formed by the rubber-based resin material 101. It is configured so that good frictional resistance is generated between the two.

By the way, the above-mentioned vacuum suction pads 59, 60 are attached to the above-mentioned frames 57, 58 as shown in FIG. A long hole 57a is formed in the front frame 57, and bushes 102, 102 with screws are attached to the long hole 57a by nuts 103, 103 so that the bushes 102, 102 can be adjusted in the left-right direction. Book mounting rods 104, 104 are inserted into the bushes 102, 102 described above, and bolts 105, 105 are attached to the end faces of the mounting rods 104, 104 that are led out from the bushes 102, 102. While the washers 106, 106 are mounted using, the coil springs 108, 108 are stretched between the bushes 102, 102 and the spring retainers 107, 107 of the mounting rod 104.

As described above, by interposing the coil springs 108, 108 described above, the air cylinder 61 is operated in the direction of arrow e from the state of FIG. 16 to move the front and rear vacuum suction pads 59, 60 to the seat S. When the pressure contact is made via the above, it is configured so as to obtain an appropriate inter-pad pressure contact force by the amount of deflection of the coil springs 108, 108 described above.

On the other hand, a long hole 58a is formed in the rear frame 58, and two mounting screws 109, 109 which are erected on the back surface of the vacuum suction pad 60 are inserted into the above-mentioned long hole 58a, and at the same time, these screws are inserted. 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, by attaching the front and rear vacuum suction pads 59, 60 to the corresponding front and rear frames 57, 58 so that the front and rear can be adjusted left and right, a sheet using a shift amount W corresponding to the front and rear l · tan θ is used. It is configured to be arbitrarily selected according to the type of S.

The sheet tensioning device N that stretches the upper end of the bag-shaped sheet S opened by the above-mentioned opening device G to make a square shape is configured as shown in FIGS. 29 to 31. That is, the rotary reactors 72, 73 (air swing motors) spaced apart from each other above the opening position of the bag-like sheet S are provided, and the rotary reactors 72, 73 are provided in front of and behind the rotary reactors 72, 73, respectively. Approximately L-shaped rotary fingers 75 are fitted and fixed to the drive shafts 74.

Then, as shown in FIG. 30, when the bag-shaped sheet S after being cut by the opening device G is opened, the rotary actuators 72 and 73 are driven to drive the drive shafts 74, ... By rotating 90 degrees in the direction of the arrow f (see FIG. 31), the rotating fingers 75 are inserted into the four corners in the upper opening of the bag-like sheet S as shown in FIG. The four corners of the bag-shaped sheet S are stretched in four directions by the rotating fingers 75 to form a square shape, and the upper end posture of the opened bag-shaped sheet S is properly corrected.

By the way, a sheet insertion device H for reciprocating the opened bag-shaped sheet S and the inside of the cardboard box A as an opening case to insert the sheet S into the cardboard box A is as shown in FIG. I am configuring. That is, a pillar 76 is provided upright on the upper front part of the main body housing 22, and an air cylinder 79 for raising and lowering is connected to the pillar 76 via brackets 77 and 78. The seat insertion frame 80 is fixed to the tip of the piston rod of the air cylinder 79, and the seat insertion device H described above is configured.

As shown in FIGS. 32 to 36, the above-described sheet insertion frame 80 has a total of four standing frame bars corresponding to the four corners of the opened corrugated cardboard box A via predetermined elevating spaces. 81 ... Are connected to each other by upper and lower connecting members 82 and 83, and by the piston rod of the air cylinder 79 described above, above the opened bag-like sheet S (see FIG. 32) and inside the opened corrugated cardboard box A ( The sheet S is inserted into the corrugated ball box A by reciprocating between the sheet S (see FIG. 35).

The above-mentioned folding device J is configured by attaching folding actuators 84 ... Which can be adjusted in vertical position by manual operation to the above-mentioned four frame rods 81.

As shown in FIGS. 34 and 35, each of the folding actuators 84 ... Aligns the upper edge of the bag-like sheet S inserted in the corrugated box A with the folding rod 85. Flap 24: An actuator for folding back from the lip of the upper end.

The operations of the sheet inserting device H and the folding device J described above are as follows. First, as shown in FIG. 32, the bag-like sheet S opened by the above-mentioned opening device G and whose upper end posture is corrected by the sheet tensioning device N descends from the sheet insertion frame 80 located above the sheet S as shown in FIG. As a result, after the state shown in FIG. 33, it is inserted into the corrugated ball box A opened as shown in FIG.

The upper end of the bag-like sheet S inserted into the corrugated cardboard box A is spread outward in a reverse C-shape by the folding actuator 84 ... And 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. 34 as shown by the arrows in FIG. 35, the upper end mouth end of the bag-like sheet S is moved as shown in FIG. The cardboard box A is folded outward from the rim at the upper end of each flap 24 to maintain the open state.

Next, as shown in FIG. 36, the above-mentioned air cylinder 79 is returned to raise the above-mentioned sheet insertion frame 80 away from the cardboard box A, and then the cardboard box A is regulated to the sheet insertion position β. The box holding by the stopper device (not shown) is released, the sheet regulating device C and the corner regulating device X are returned to the normal state, and the cardboard box A after the sheet insertion is completed by the roll conveyor 5 of the box conveying device B. Is carried in the direction of arrow a in FIG.

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

By the way, the above-mentioned air nozzle device P is configured as shown in FIG. That is, the inner nozzle 113 is arranged along the axis of the cylindrical outer nozzle 112, and the respective air passages 114 and 115 of these nozzles 112 and 113 are supplied to the same air supply passage through different air supply passages. In addition to being connected to a supply source (not shown), a nozzle holder 116 is attached to the outer periphery of the upper portion of the outer nozzle 112 described above, and the nozzle holder 116 is attached to the frame rod 81 of the sheet insertion frame 80 described above so that the vertical position can be adjusted. ing.

The lower end of the inner nozzle 113 is formed with a downwardly directed injection hole 116, while the outer nozzle 112 is formed with a plurality of laterally directed injection holes 117 to form the opening device G. The upper end of the bag-like sheet S is opened, and only the above-mentioned inner nozzle 113 is driven to inject air from the injection holes 116 during the suction action of the vacuum suction pads 59, 60, and the air from above the bag-like sheet S is blown. 29 is sprayed inside the bag-like sheet S, and substantially the entire inside of the bag-like sheet S is filled with air from the insufficient opening state shown by the phantom line in FIG. 29 as shown by the solid line in FIG. is doing.

Further, the outer nozzle 112 described above is driven under the condition shown in FIG. 34, and air is blown from the inside of the bag-like sheet S inserted in the corrugated box A into the direction in which the sheet S comes into close contact with the inner surface of the box. The bag-like sheet S is closely attached to the inner surface of the box by spraying and improving the incomplete insertion state of the sheet S only by the sheet insertion frame 80.

The illustrated embodiment is configured as described above, and the operation will be described below. First, as shown in FIGS. 1 and 2, the above-described box transfer device B transfers the upper opening type cardboard box A with the inner and outer flaps 24 standing to the bag-like sheet insertion position β, and the stopper device (not shown). The cardboard box A is positioned at a predetermined position by (No.).

Next, the corner regulating device X shown in FIG. 7 is driven, and the flaps 24 of the corrugated box A are straightened by the four corner regulating blocks 19 ... As shown in FIG.

Next, the sheet regulating device C shown in FIG. 5 is driven to move the four sheet regulating blocks 16 in total so as to wrap with the four corner edges of the corrugated cardboard box A when viewed from the top (see FIG. 6). The sheet regulation device C may be driven before the sheet insertion device H is lowered.

Next, the bag-like 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, 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 bag-like sheet S is relatively shifted vertically and the same sheet is moved. External air is introduced into S.

Next, a sheet welding device K shown in FIG. 2 is used to heat-weld a predetermined position on the side of the original roll 27 with respect to the punching position (specifically, about 50 mm before the punching position by the needle 53). The welded portion 37 is formed. Next, the punched bag-like sheet S is supplied to the front part of the vacuum suction pads 60, 60 in the opening device G by a length corresponding to the shape of the corrugated cardboard box A.

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

When the bag-shaped sheet S is sucked by the above-mentioned vacuum suction pads 59 and 60, as shown in FIGS. 23 and 28, the suction adjuster 93 previously described corresponds to the material, rigidity and thickness of the sheet S. Since the depth T is set, a wrinkle for introducing outside air is formed on the side of the bag-shaped sheet S to be opened due to the depth T, and the formation of this wrinkle causes the bag-shaped sheet S to open toward the opening side. By introducing the outside air, a stable opening operation of the bag-like sheet S can be performed in the next step.

The distance U between the outer peripheral surface of the suction adjuster 93 and the inner peripheral surface of the suction block 91 is a small distance such that the cut surface S1 of the cut bag-like sheet S, so-called ear, does not enter the inside of the suction chamber 92. Since it is formed in the above manner, the vacuum pressure leak phenomenon can be prevented, and the vacuum pressure can be prevented from lowering. Therefore, the suction force of the bag-shaped sheet S can be secured.

Next, after the state shown in FIG. 17 and the state shown in FIG. 18, the bag-shaped sheet S after cutting is subjected to the opening process by the above-described opening device G as shown in FIG. When the above-mentioned state of FIG. 18 is reached, the bag-shaped sheet S is further moved into the bag by the leftward movement of W = 1 / tan θ (see FIG. 21, FIG. 21) of the vacuum suction pads 60, 60 on one side. It is introduced to facilitate opening processing. Here, at the time of the above-mentioned shift operation, since the rubber-based resin material 101 causes a good frictional resistance between the sheet S and the vacuum suction pads 59, 60, the shift operation can be surely performed.

Next, as shown in FIGS. 20 and 31, the rotating fingers 75 of the sheet tensioning device N are engaged with the four corners in the upper end of the opened bag-like sheet S, and the vacuum suction pads 59, The above-mentioned four corners where the vacuum suction force of 60 does not reach sufficiently are pulled in all directions to correct the seat top end posture into a square shape.

In the state shown in FIG. 20 (under the operating state of the vacuum suction pads 59, 60), the inner nozzle 113 in the above-mentioned air nozzle device P is driven, and the inside of the bag-like sheet S from the injection hole 116 at the lower end thereof is driven. When air is blown on the bag-shaped sheet S, the bag-shaped sheet S is filled with air from the insufficient opening state shown in FIG. 29 to every corner of the bag-shaped sheet S as shown by the solid line in the figure.

Next, as shown in FIGS. 32 to 36, the sheet insertion device H and the folding device J are driven to insert the bag-like sheet S into the corrugated cardboard box A opened at the sheet insertion position β, and 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 sheet inserting device H and the folding device J are returned to the normal position shown in FIG. In addition, the above-mentioned air introduction hole 55 is located outside the folded portion. Here, in the state shown in FIG. 34, that is, under the state where the bag-shaped sheet S is inserted in the corrugated cardboard box A, the outer nozzle 112 in the air nozzle device P described above is driven and the plurality of injection holes 117 are driven. The bag-like sheet S is brought into close contact with the inner surface of the cardboard box A by blowing air from above.

Next, the above-mentioned stopper device (not shown) releases the stop holding of the cardboard box A at the sheet insertion position β, and the sheet regulating device C and the corner regulating device X are returned to the normal state. The corrugated cardboard box A in which the bag-like sheet S is inserted is conveyed in the direction of the arrow a in FIG. 1 to complete a series of sheet automatic insertion operations. The bag-like sheets S are automatically inserted into A ...

In summary, the inner nozzle 113 for blowing air from above into the bag-like sheet S is provided when the bag-like sheet S is opened by the opening device G and during the suction action of the vacuum suction pads 59 and 60. Since at least the above-mentioned inner nozzle 113 fills substantially the entire bag-shaped sheet S with air to move the above-described sheet insertion device H downward, air is supplied to every corner of the bag-shaped sheet S. In the filled state, the above-described sheet inserting device H, more specifically, the sheet inserting frame 80 moves downward, so that the bag inserting sheet S can be satisfactorily inserted into the cardboard box A by the sheet inserting frame 80. effective.

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 insertion means corresponds to the sheet insertion device H, and 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. However, the present invention is not limited to the configuration of the above-described embodiment.

For example, the air is blown by the inner nozzle 113 from the face of the bag-shaped sheet S in a substantially completely open state until the upper end of the sheet S is separated from the vacuum suction pads 59, 60 by the downward movement of the sheet insertion frame 80. Of course, it may be done continuously.

[Brief description of drawings]

FIG. 1 is a front view showing an automatic seat insertion device of 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 regulation device and a corner regulation device.

FIG. 4 is a side view of a seat restricting device and a corner restricting device.

FIG. 5 is a plan view of the seat restraint device in a normal state.

FIG. 6 is a plan view of the seat regulating device under a regulated state.

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

FIG. 8 is a plan view of the corner restricting device in a restricted state.

FIG. 9 is a cross-sectional view of a punching device and a shifting device.

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

FIG. 11 is a cross-sectional view of the block taken along line ZZ in FIG.

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 view of a fixed position forward movement operation of the seat.

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

FIG. 20 is an explanatory diagram of a seat tensioning operation.

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

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

23 is a vertical cross-sectional view of the central portion of FIG.

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

25 is a cross-sectional view taken along the line QQ of FIG.

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

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

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

FIG. 29 is a cross-sectional view of the seat tensioning device.

FIG. 30 is a front view of the seat tensioning device.

FIG. 31 is an explanatory view of the seat tensioning operation by the rotating fingers.

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

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

FIG. 34 is an explanatory view showing an inserting operation of the bag-shaped sheet.

FIG. 35 is an explanatory view showing a folding back operation of the mouth edge of the bag-shaped sheet.

FIG. 36 is an explanatory diagram showing a rising return operation of the sheet insertion frame.

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

[Explanation of symbols]

 A ... Cardboard box S ... Bag-like sheet G ... Opening device H ... Sheet insertion device P ... Air nozzle device 59, 60 ... Vacuum suction pad 113 ... Inner nozzle

Claims (1)

[Scope of utility model registration request] 1. An opening means for opening the upper end of the cut bag-shaped sheet with front and rear vacuum suction pads, and a reciprocating motion between the opening of the opened bag-shaped sheet and the inside of the opening case to move the sheet inside the opening case. A sheet inserting device having a sheet inserting means for inserting the air into the bag-shaped sheet from above when the bag-shaped sheet is opened by the opening means and during the suction action of the vacuum suction pad. A sheet insertion device configured to move the sheet insertion means downward by filling substantially the entire air inside the bag-shaped sheet with at least the air nozzle.