JPH0576904B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for inserting a film bag into a case, which is used when inserting a resin film bag into various cases such as carton cases, containers, and styrofoam boxes. It is.

BACKGROUND TECHNOLOGY Bulk items are generally transported in a case, but depending on the material of the case and the type of the bulk item, the case may be damaged and the quality of the product may be impaired. Furthermore, when loose items are products, especially refrigerated or frozen foods, the case becomes dirty, making it impossible to reuse the case. Therefore, recently, a film bag is inserted into the case, and loose items are packed into the film bag and transported. Normally, the film bag is inserted manually, and this method does not allow for efficient insertion. Therefore, recently, a mechanical type has been considered in which a vacuum cup is used to open the opening of the film bag, and the film bag is inflated by air pressure and inserted into the case.

Problems to be Solved by the Invention According to the above-mentioned machine type, when the film bag is inserted into the case and the suction by the vacuum cup is released, when the case is moved away from the vacuum device (downward), air resistance etc. As a result, the area around the opening of the film bag may curl up or the film bag may not be inserted properly. In addition, when cases with film bags inserted are transported by conveyor, for example, to the product packing area, when passing through openings such as fire walls, strong winds are generated at the openings due to pressure differences between floors and rooms. Because of this, strong winds can cause the film bag to come off.

An object of the present invention is to be able to reliably insert a film bag into a case, maintain the inserted form of the film bag when moving the case apart after insertion, and transport the case without the film bag coming off. The object of the present invention is to provide a method for inserting a film bag into a case.

Means for Solving the Problems In order to solve the above problems, the method of inserting a film bag into a case according to the present invention is to apply a liquid to at least one outer surface of the case and send the film bag through a transfer path with the opening facing downward. The case is positioned below, and the area around the opening of the film bag that has been sent out is held by an opening device to expand the opening, while air is supplied from above by an air supply device, and the film bag is turned inside out into the case. After inserting the film bag and releasing the air supply and holding, the area around the opening of the film bag is pressed against the outer surface of the case.

According to the structure of the present invention, after inserting the film bag inside the case while turning it over, by releasing the air supply and holding, the area around the opening falls down and covers the inside and outside of the upper edge of the case. It turns out. Then press the area around the opening against the outside of the case.
The liquid applied to the outer surface in advance allows the area around the opening to be brought into close contact with the outer surface.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 15.

1 to 7, the main body of the film bag insertion equipment 1 is formed by a machine frame 2 in the form of a rectangular frame,
A main conveyor 3 is disposed so as to pass through the machine frame 2. An incoming conveyor 4 is connected to the starting end of the main conveyor 3, and an outgoing conveyor 5 is connected to the terminal end. Although these conveyors 3, 4, and 5 are shown as belt conveyors, they may be roller conveyors or the like. A linear conveyance path 6 is formed by these conveyors 3, 4, and 5.
The carry-in conveyor 4 has an open top surface and carries a rectangular box-shaped case 7, and the carry-in conveyor 5 conveys a rectangular box-shaped case 7.
transports the case 7 into which the expanded film bag 8 is inserted. Inside the machine frame 2, a device for making a film bag 8 and inserting it into the case 7 is installed along a transport path 6.
Two units are installed in the direction of . These devices are of identical or nearly identical construction, and only one will be described below. Note that the base number may be singular or a plurality of three or more bases. The machine frame 2 is placed on the side of the conveyance path 6.
A rewinding device 11 is provided at the lower part of the interior to rotatably support a roll body 10 formed by winding a long film 9, which is an example of a sheet material, and a rewinding device 11 is provided at the lower part of the inner part. A delivery device 12 for intermittently transporting the material 9 downward is provided. The long film 9 has a cylindrical tube body folded (crushed) into a gusset shape, and has welded portions 13 and perforated portions 14 close to each other, and is arranged at a predetermined pitch in the length direction. In a state where it is formed in a stack, it is previously wound into a roll shape to form a roll body 10, and then set in the unwinding device 11. A hanging portion 15 is formed between the rewinding device 11 which is continuously operated and the feeding device 12 which is intermittently operated so that the long film 9 can be transferred smoothly even in different operating modes. A cutting device 16 for the perforation portion 14 is provided below the feeding device 12, and the cutting device 1
An opening device 17 is provided below the film bag 8 to expand the opening 8a by adhering to the periphery of the opening 8a of the film bag 8. A clamp-type lower conveyor 21 and a downward air supply device 18 are disposed between the cutting device 16 and the opening device 17. Main conveyor 3
The main conveyor 3 is installed directly below the opening device 17 at
A lift device 19 is provided for lifting the case 7 from above. 20 indicates a manual operation box.

In the above-mentioned overall configuration, the operation is as follows. The empty cases 7 are passed from the infeed conveyor 4 to the main conveyor 3 and are stopped between the opening device 17 and the lifting device 19. On the other hand, the long film 9
is sent downward by a length equal to a predetermined pitch by the intermittent driving of the feeding device 12 and the interlocking driving of the lower feeding conveyor 21, and the peripheral edge of the downward opening 8a is opened by the intermittent stoppage of the device 17. to face. In this state, the pair of suction devices of the opening device 17 move toward each other to suction both sides of the peripheral edge, and the cutting device 16 operates to cut the perforation portion 14. As a result, a film bag 8 is formed in which the opening 8a is located at the bottom and is held between the lower conveyor 21. Next, the air supply device 18 is operated to supply downward air, and with the delivery device 12 and the lower conveyor 21 being driven, both suction devices are moved away from each other. Then, the opening 8a of the film bag 8 sent out by the lower conveyor 21 is gradually expanded and turned over by the supplied air force, so that it becomes bulged.
Before and after the above-described air supply, the case 7 is lifted by the operation of the lift device 19, and the bulge of the film bag 8 is inserted into the case 7. Then, with the air supply stopped and the suction by the opening device 17 released, the lift device 19 is reversely operated to lower the case 7 and unload it onto the main conveyor 3. The case 7 into which the film bag 8 has been inserted is transferred from the main conveyor 3 to the discharge conveyor 5, and then transported to the next process such as filling.

A coating device 22 that applies a liquid to at least one outer surface of the case 7 during the path of the carry-in conveyor 4.
is provided. That is, the coating device 22 is as shown in FIG.
As shown in FIG. 4, it has a gate-shaped main body 23 that straddles the carry-in conveyor 4, and a stopper device 24 that can be freely engaged and detached from the front surface of the case 7 that has been transported. Furthermore, a front spray device 26A is provided on the main body 23 for applying a liquid 25 such as water to the front outer surface 7a of the case 7 received by the stopper device 24.
A pair of left and right side spray devices 26B for applying the liquid 25 to the outer surfaces 7b of both sides are provided, and a liquid supply device 27 is provided on the top frame. The film bag insertion device includes an opening device 17, an air supply device 18, and a lift device 19.First, details of the opening device 17 will be explained below with reference to FIGS. 8 to 12. A pair of left and right frames 30, which are integral with the machine frame 2, are provided at the front and rear, and rails 31 are laid on these left and right frames 30. A pair of left and right movable platforms 32 are disposed astride between the front and rear rails 31, and these movable platforms 32 are supported by the rails 31 via sliding bodies 33. An actuating device 34 that moves both movable bases 32 toward and away from each other in the left and right direction is connected to the left and right frames 30.
a holding frame 35 disposed above; a front-back pin 36 attached to the holding frame 35 at the center in the left-right direction;
A vertically movable lever 38 whose intermediate portion is supported by this longitudinal pin 36 via a bearing 37, a vertical pin 40 which is erected from a bracket 39 integral with the holding frame 35 at the left and right ends, and Bearing 4
A left-right lever 42 whose intermediate portion is supported via 1
and a first push/pull rod 4 that connects the end of the vertically movable lever 38 and the base end of the horizontally movable lever 42 so as to be able to freely swing relative to each other.
3, the free end of the left-right lever 42 and the movable base 32
A second push/pull rod 44 that connects the
and a cylinder device 45 provided between the holding frame 35 and the vertically movable lever 38, and both push and pull rods 43, 44 are configured to be freely adjustable in length using a turnbuckle type. A pair of front and rear plates 50 are vertically disposed from the lower surface of both movable bases 32, and between these plates 50, a first rotating shaft 51 located on the inside and a second rotating shaft 52 located on the outside are mounted on bearings. 53 and 54 are disposed in the front-rear direction. The suction head 55, which is attached to the first rotating shaft 52 and is swingable in the approaching and separating directions, has a main body 5.
6 is fixed to the first rotating shaft 52. A recess 57 is formed in the main body 56 and opens at the front surface 56a. Here, the recess 57 has a dovetail-shaped cross section in which the diameter D of the interior 59 is larger than the diameter d of the opening 58. In the main body 56, a plurality of suction passages 60 are formed in the circumferential direction, the inner ends of which communicate with the recess 57 at positions outside the diameter d of the opening 58, and the outer ends of these suction passages 60 are connected to suction hoses. It merges into a connection port 61 (not shown). The suction head 55
are arranged in pairs in the front and rear with respect to both the first rotating shafts 51 at a predetermined interval, and between the suction heads 55 facing each other on the left and right sides, the openings 58 are opened in the front and back direction (lateral direction). The phase is shifted by a predetermined pitch P. An arm 62 is attached to the second rotating shaft 52 corresponding to each suction head 55,
These arms 62 have the suction head front surface 56a.
A clamp piece 63 is attached which can freely clamp the film side 8b between the two sides. This clamp piece 63 is swingable together with the arm 62 in the approaching and separating directions.
Both movable bases 32 are provided with a common cam device 65 for swinging the suction head 55 and the clamp piece 63. That is, a bearing 66 is provided in the center of the movable base 32.
A cam shaft 67 is disposed in the vertical direction via the cam shaft 67, and a first cam 69 is provided on the outer periphery of the cam body 68, which is integrated with the cam shaft 67 and located below the movable base 32.
However, a second cam 70 is also provided at the bottom. Blocks 71 and 72 are located in the middle of both rotating shafts 51 and 52.
is fixed, and a first cam 69 is attached to one block 71.
A first cam follower 73 corresponding to the second cam 70 is freely rotatably attached to the other block 72, and a second cam follower 74 corresponding to the second cam 70 is freely rotatably attached to the other block 72. The cylinder device 7
There are 6. Both cam followers 73 and 74 are disposed 180 degrees apart with the cam body 68 inside.
Also, both cams 69 and 70 are in opposite positions, respectively.
It is set in a range of 180 degrees. Here, the first cam 69
The second cam 70 is formed to move from a short small diameter portion 69a to a sloped portion 69b and then to a long large diameter portion 69c, and the second cam 70 is formed to move from a long small diameter portion 70a to a sloped portion 70b and then to a short large diameter portion 70c. It is formed to move to. Note that springs 77 and 78 are provided between the blocks 71 and 72 and the movable base 32 to urge the cam followers 73 and 74 into pressure contact.

As shown in phantom lines in FIG. 6, the air supply device 18 is disposed above the movable platforms 32 that have moved toward each other so that the supply hose 80 opens downward, and the supply hose 80 is supported by a support member 81. It is supported on the machine frame 2 side.

As shown in FIGS. 13 to 15, the lift device 19 has an elevating frame 85 that is interlocked with a drive device. That is, a cylinder device 88, which is an example of a drive device, is attached upward to a support plate 87 that is integral with the support frame 86 of the main conveyor 3;
A horizontal plate portion 85a of the elevating frame 85 is connected to the upward piston rod 89 of 8. A rod-type elevation guide device 90 is provided between the support plate 87 and the horizontal plate portion 85a. The elevating frame 85 is formed by a front and rear plate part 85b and a left and right plate part 85c, which are integrated at a horizontal plate part 85a. A stand 91 is attached. Front and rear plate parts 85
A front and rear film presser 92 is provided on each of the left and right plate portions 85c, and a left and right film presser 93 is provided on each of the left and right plate portions 85c. Front and rear film presser 9
2, a rotating shaft 95 supported in the left-right direction via a bearing 94 on the outer surface of the upper end of the front and rear plate portions 85b; a link 96 fixed to the rotating shaft 95;
and the front and rear plate portions 85b.
7, and arms 9 fixed to both ends of the rotating shaft 95.
8 and a presser roller 99 attached to the free ends of these arms 98. Note that the left and right plate portions 85c
The left and right film holders 93 disposed in the
It is composed of a cylinder device 103, an arm 104, and a presser roller 105. Each film presser 92,
93 has arms 98 and 104 that can stand up and fall down, and when they stand up, presser rollers 99 and 105 come into contact with the upper parts of the four outer surfaces 7a, 7b, and 7c of the case 7 supported on the support stand 91. As such, the length of arms 98, 104 and cylinder devices 97, 10
3 strokes are set. 106 indicates a stopper device.

Next, the operation of inserting the film bag into the case 7 will be explained.

Case 7 transported by loading conveyor 4
enters the main body 23 of the coating device 22 and is stopped by being received by the stopper device 24 on the front outer surface 7a. In this state, the liquid supply device 27 is operated, and the liquid 2 from each spray device 26A, 26B is
5 is sprayed onto the upper portions of the front outer surface 7a and both side outer surfaces 7b. As a result, the liquid 23 is applied to the case 7 side, and the stopper device 24
By retreating, this case 7 is conveyed to the main conveyor 3 side. Thereafter, the stopper device 24 is moved forward again to receive the next case 7. In the lift device 19, when the elevating frame 85 is at the lower limit,
The arms 99 of the front and rear film presses 92 are in a horizontal position as shown in FIG. 14, and the arms 104 of the left and right film presses 93 are in a separated position. Therefore, the main conveyor 3 can transport the case 7 without being obstructed by the arms 98, 104.
The transported case 9 is stopped by a stopper device 106.
It stops at a fixed position above the support stand 91 by being received by the support table 91. In this state, when the cylinder device 88 is extended and the elevating frame 85 is raised, the support base 91 that rises together comes into contact with the lower surface of the case 7.
This case 7 will be lifted from the main conveyor 3. A film bag 8 is inserted into the lifted case 7 from the film bag opening device side. That is, the long film 9, which has been fed downward by the interlocking intermittent driving of the feeding device 12 and the downward conveyor 21, is stopped when the periphery of the opening 8a faces the two suction heads 55. At this time, in the opening device 17, the virtual line in FIG.
As shown by the imaginary lines in Figure 0, the movable bases 32 are moving away from each other, and the cam device 65 has both cam rollers 73 and 74 facing their respective small diameter portions 69a and 70a as shown in Figure 12. From, the first
As shown by the imaginary line in Figure 0, the suction head 55 is in a vertical position, and the arm 62 is in a rearward position. As mentioned above, the lower end of the long film 9 whose downward feeding has stopped is detected by a detection device such as a phototube type, and first, the lower end of the long film 9 is detected by a detection device such as a phototube type, and first, the lower end of the long film 9 is detected by a detection device such as a phototube type.
2 are moved closer together. That is, the contraction of the cylinder device 45 causes the vertically movable lever 38 to swing around the longitudinal pin 36, and the first push-pull rod 43 is pushed out. As a result, the left-right lever 42 swings around the vertical pin 40, and the movable base 32 is moved closer via the second push-pull rod 44. This approach movement causes the first
As shown by the solid line in Figure 0, the lower end of the long film 9 is held between the front surface 56a of the main body of the suction head 55. When a suction force is applied to the connection port 61 side in this state, this suction force is applied to the recess 57 through the suction path 60.
Therefore, the suction force acting on the opening 58 attracts the film side 8b. At this time, the film side 8b enters the recess 59 through the opening 58 due to the suction force, and then enters the interior 59 with which the suction path 60 communicates. As a result, the film side 8b enters along the dovetail shape. When the cylinder device 76 of the cam device 65 is operated in this state, as the cam body 68 rotates in the direction of the arrow in FIG.
The large diameter portion 69c of the cam 69 is the first cam follower 73
This causes block 71 to
The first rotation shaft 51 is rotated through the suction head 51 to swing the two suction heads 55 away from each other as shown by the imaginary lines in FIG. Due to this rocking, the adsorbed film side 8b is opened to the left and right.
At this time, since the suction position is shifted, the opening is performed reliably. As the cam body 68 mentioned above rotates, the second diameter portion 70c of the second cam 70 acts on the second cam follower 74, thereby rotating the second rotating shaft 52 via the block 72 and further rotating the arm. 62 to swing the clamp piece 63 upward. Then, the clamp piece 63 enters into the opened opening 8a and clamps the film side 8b between it and the main body front face 56a, as shown by the imaginary line in FIG. At this time, cutting by the cutting device 16 has been completed above, and therefore the opening 8a of the film bag 8 has been clamped. Next, the movable base 32 is moved away by the reverse operation of the actuating device 34, but at this time, the feeding device 12 and the lower conveyor 21 are intermittently driven again, and air is supplied from the air supply device 18. Ru. Then, the film bag 8 that has been sucked around the opening 8a is sent out by the lower conveyor 21, and the opening 8a is expanded. After being expanded by a predetermined amount, the film bag 8 continues to be fed out. At this time, since air is supplied from above, the film bag 8 is turned over as it is fed out, and then lifted by the lift device 19. It is inserted into the case 7. After insertion, the air supply is stopped and the 12th
As shown in the figure, by arranging the small diameter portions 69a and 70a of the cam followers 73 and 74 to face each other,
First, the clamp piece 63 is moved down to release the clamp, and the suction head 55 is placed in a vertical position. Before and after this, the suction force on the suction head 55 side is released, and the suction and holding of the film side 8b is released. Then, the area around the opening 8a of the film bag 8 falls,
The film side 8b portion covers both the inside and outside of the upper edge of the case 7. In this state, the cylinder devices 97, 103 of both film pressers 92, 93 are extended, and the arms 98, 104 are swung around the axes of the rotating shafts 95, 101. As a result, the presser roller 9
9, 105 are brought into contact with the outer surface of the case 7 via the film side 8b, as shown in FIG. 13, thereby clamping the film side 8b. By this pressing and holding, the liquid 25 applied in advance to the front outer surface 7a and the side outer surface 7b is applied to the film side 8b.
is in close contact with each outer surface 7a, 7b. The elevating frame 85 is lowered while maintaining this clamping posture with close contact, and the case 7 is unloaded onto the main conveyor 3. The difference in stroke at this time is the presser rollers 99 and 10.
It can be absorbed with 5 free rotations. Then arms 98, 10
4 is moved away and the stopper device 106 is released, the case 7 into which the film bag 8 has been inserted is transported to the next process. Even if a strong wind acts on the case 7 during this transportation, the film bag 8 will not come off because the film side 8b is in close contact with the liquid 25 as described above.

Note that the spray coating by the coating device 22 is time-controlled to prevent overcoating.

In the above embodiment, the liquid 2 is on the three outer surfaces 7a and 7b.
5 has been shown, but this may be applied to only one surface of the front outer surface 7a, or when coating only two surfaces, the left and right side outer surfaces 7b, the case 7 may be continuously conveyed without stopping. can.

As shown in FIG. 16, two stopper devices 24 are provided.
When used properly, the rear outer surface 7c can also be coated by the rear spray device 26c.

As the coating device 22, a brush 110 may be used as shown in FIG.
0 is immersed in the liquid 25 in the liquid tank 111.

Effects of the Invention According to the present invention having the above configuration, with the case positioned below the transfer path, the area around the opening of the sent-out film bag is opened by the opening device, and air is supplied from the air supply device. The film bag can be turned inside out while being opened, and can also be inflated downward by air pressure, and the bulge can be reliably inserted into the case. Next, by stopping the air supply and then releasing the holding by the opening device, the area around the opening can be dropped to cover the inside and outside of the upper edge of the case. At this time, since the liquid has been applied to at least one of the outer surfaces of the case,
By pressing the periphery of the covered opening as described above against the outer surface of the case, the periphery of this opening can be brought into close contact with the outer surface via the liquid. This results in
The case can be transported without the film bag coming off.

[Brief explanation of drawings]

1 to 15 show an embodiment of the present invention,
Fig. 1 is a perspective view showing the film bag insertion equipment into the case, Fig. 2 is a partially cutaway side view of the same, Fig. 3 is a rear view of the same, Fig. 4 is a partially cutaway plan view of the same main part, 5 to 7 are schematic perspective views showing the operating state of the main parts, FIG. 8 is a partially cutaway side view of the film bag opening device, FIG. 9 is a partially cutaway plan view of the same, and FIG. 10 11 is a side view of the suction head section, FIG. 12 is a schematic plan view showing the cam section, FIG. 13 is a side view of the lift device section, and FIG.
15 is a front view of the same, FIG. 16 is a partially cutaway side view of the main part showing another embodiment, and FIG. 17 is a further embodiment. FIG. 1... Film bag insertion equipment, 3... Main conveyor, 4... Carrying in conveyor, 5... Outgoing conveyor,
7...Case, 7a...Front outer surface, 7b...Side outer surface, 7c...Rear outer surface, 8...Film bag, 8
a...Opening portion, 8b...Film side, 9...Long film (sheet material), 12...Feeding device,
16... Cutting device, 17... Opening device, 18...
Air supply device, 19...Lift device, 22...Coating device, 25...Liquid, 26A...Front spray device, 26B...Side spray device, 26C...
Rear spray device, 27...Liquid supply device, 32
... Movable base, 34 ... Actuation device, 51 ... First rotation shaft, 52 ... Second rotation shaft, 55 ... Suction head, 63 ... Clamp piece, 80 ... Supply hose,
85... Lifting frame, 88... Cylinder device, 91...
...Support stand, 92...Front and rear film presser, 93...
Left and right film presser, 98...arm, 99...presser roller, 104...arm, 105...presser roller, 106...stopper device, 110...brush.

Claims (1)

[Claims] 1 Apply a liquid to at least one outer surface of the case, position the case below the transfer path for sending out the film bag with the opening facing downward, and hold the periphery of the opening of the delivered film bag with an opening device to open the opening. While expanding the film bag, supply air from above using the air supply device, insert the film bag into the case while turning it over, and after releasing the air supply and holding, press the area around the opening of the film bag against the outer surface of the case. A method of inserting a film bag into a case characterized by: