JPH0442242B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a device for attaching bags to boxes.

(Prior Art) At collection and delivery centers such as consumer cooperatives, food is packed in styrofoam boxes, delivered to the stores and customers mentioned above, and the boxes are collected and reused. Usually, food is packed after a thin plastic film bag is attached to the box. This prevents the inner surface of the box from getting dirty, and also allows the store or customer to take out the food in its bag and hand it to them, and then collect the box on the spot.

The bag was attached manually. First, as shown in FIG. 17, the closed end 9b of the bag 9 is pushed into the box 1. Next, as shown in FIG. 18, the open end 9a of the bag 9 is folded back to the outside to fit around the outer periphery of the box 1. Finally, as shown in FIG. 19, the bag 9 is attached to the inner surface of the box 1. The reason why the open end 9a of the bag 9 is folded back to the outside of the box 1 is to prevent the open end 9a from being drawn into the inside of the box 1 during the food packing operation, resulting in incomplete installation. It is.

(Problems to be Solved by the Invention) The above method is labor intensive and inefficient since it is done manually. Also, connect the open end 9a of the bag 9 to the box 1.
The work of folding it outward requires skill, and
It took a lot of time. Furthermore, the bag must be obtained by pulling out the film from a film roll made of a flattened cylindrical film and cutting it into a predetermined size, which is also a complicated process.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and its gist is (a) supporting a film roll made by winding a flat cylindrical film; (b) a moving mechanism that positions the vicinity of the tip of the film pulled out from the film roll at a predetermined height directly above the box with an open top; and (c) at least one pair of suction devices. (2) a spreading mechanism that sucks both sides of the film near the tip and spreads it; (e) a cutting mechanism that cuts the film to obtain independent bags; and (f) a cutting mechanism located above the box that directs air downward. In the bag mounting device, the moving mechanism includes: (i) a chuck jig;
(ii) a drive means for moving the chuck jig along an endless trajectory of movement including a vertically descending trajectory located directly above the box; and (iii) at a position prior to the vertically descending trajectory in this trajectory of movement; (iv) a chuck actuating means for activating a chuck jig to grip a portion near the tip of the film; and (iv) a chuck actuating means disposed near the expansion mechanism, in which the portion near the tip of the film gripped by the chuck jig of the moving mechanism is vertically lowered. After descending along the trajectory and reaching the above-mentioned predetermined height and being placed between the open adsorbers, the chuck jig is activated before the adsorbers adsorb the area near the tip of the film and open it. The bag mounting device is characterized in that it has a release actuation means for releasing a portion near the leading end of the film.

(Function) The vicinity of the tip of the film pulled out from the film roll of the support mechanism is grasped by the chuck jig of the moving mechanism and lowered vertically to position the tip at a predetermined height directly above the box. Next, the holding state by the chuck jig is released, and the portion near the tip of the film (the opening end of the bag) is spread out by the suction device of the spreading mechanism. Next, a portion near the tip of the film (the open end of the bag) is grasped by a chuck jig of the lowering mechanism, and the tip is relatively lowered to a position on the outer periphery of the box. Simultaneously with the expansion by the suction device, the film is cut by a cutting mechanism to obtain independent bags. Furthermore, air is blown into the bag from a nozzle simultaneously with the lowering of the tip of the bag by the lowering mechanism, thereby pushing the bag into the inside of the box. By lowering the tip of the bag to the outer periphery of the box and pushing the bag inside the box, the bag is attached to the box with the open end folded back. In this way, bags can be automatically and efficiently attached to boxes. In particular, by grasping and feeding the vicinity of the leading edge of the film pulled out from the film roll with the chuck jig of the moving mechanism, the leading edge can be accurately positioned at a predetermined height and can be prevented from swinging due to air currents. be able to. As a result, the leading end of the film can be reliably transferred from the chuck jig to the expanding mechanism, and in turn, can be reliably transferred to the chuck jig of the lowering mechanism.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 16. 10 in Figure 1 is the main body,
The main body 10 has a lower frame 11 formed into a rectangular parallelepiped by connecting a number of sections, and a pair of plate-shaped upper frames 12 that are fixed perpendicularly to the lower frame and are parallel to each other.

As shown in Figures 1 and 2, the lower frame 1
1, a conveyor 13 is installed.

The box 1 conveyed by the conveyor 13 is made of, for example, styrofoam, and has a rectangular bottom portion 1a and a side wall portion 1b, and is open at the top.

As shown in FIGS. 1 and 2, the main body 10 includes a support mechanism 20 that supports the film roll 5.
a moving mechanism 30 that pulls out the film 6 from the film roll 5 and moves the leading end 6a of the film 6 to a predetermined height directly above the box 1; a spreading mechanism 60 that spreads out the leading end 6a of the film 6; A cutting mechanism 50 that obtains an independent bag 9; and a lowering mechanism 70 that lowers the tip 6a of the film 6 (open end 9a of the bag) to the outer periphery of the box 1 while further expanding it.
and a pushing mechanism 98 for blowing air into the bag 9 and pushing it into the box 1.

The film roll 5 has a cylindrical resin film 6 folded flat as shown in FIG.
This film 6 has perforations 7 and welded portions 8 formed at predetermined intervals.

The support mechanism 20 that supports the film roll 5 is
As shown in FIG. 1, it is provided on the side of the lower frame 11. This support mechanism 20 has a housing 21 with an open top, and between mutually opposing both side walls of this housing 21, a pair of shafts 22,
23 is rotatably supported, and long rollers 24, 25 are fixed to the pair of shafts 22, 23. The film roll 5 is placed on these rollers 24 and 25. Furthermore, slits 21a are formed in both side walls of the housing 21, reaching up to the upper edge thereof.
A support shaft 5a of the film roll 5 is inserted into the holder.

On the outer surface of both side walls of the housing 21, brackets 26 and 27 are provided on the left and right sides of each slit 21a.
is fixed. These brackets 26, 27
A hole is formed in the hole through which the rod 28 can be inserted. One end of the rod 28 is rotatably supported in the middle of a lever 29, and the lower end of the lever 29 is rotatably supported by the housing 21.

A moving mechanism 30 for moving the leading end 6a of the film 6 is provided on the upper frame 12. The moving mechanism 30 has four shafts 31, 32, 33, and 34 that are rotatably supported by the upper frame 12 and parallel to the conveyor 13.
A long roller 35 is fixed to a shaft 31 located almost directly above the support mechanism 20 described above.
Similarly, long rollers 3 are also attached to the upper shafts 32 and 33.
6 and 37 are fixed. Each roller 36, 37
A plurality of guide ropes 38 are stretched between the rollers 36 and 3.
A plurality of ring-shaped grooves 36a, 37 formed in 7
It is stored in a. The upper part of this guide rope 38 is horizontal. Further, a pressing roller 39 is in contact with the roller 35 due to the force of a spring (not shown).

Sprockets 41, 42, 43 are fixed to both ends of the three shafts 31, 33, 34, respectively. A chain 40 (driving means) is stretched between each set of sprockets 41 to 43, respectively. This chain 40 has a horizontally moving part 40a, a vertically descending part 40b, and an inclined rising part 40c, and has a triangular shape. The vertical descending section 40b is the conveyor 1
It is located directly above 3. The horizontal moving part 40a and the vertical descending part 40b of the chain 40 are shown in FIG.
As shown in FIG. 6, it is inserted and guided between a pair of guide rails 44a and a pair of guide rails 44b fixed to the upper frame 12. Note that the guide rails 44a, 44b
also has the role of inhibiting the movement of the receiving member 46 during the opening/closing operation of the chuck jig 45, which will be described later. Guide rails 44a, 44b are omitted in FIG. 1 to simplify the drawing.

The moving mechanism 30 further includes three chuck jigs 45 attached to each chain 40 at equal intervals. This chuck jig 45 is shown in FIG.
As shown in FIG. 6, it has a receiving member 46 and a pressing member 47 rotatably supported by the receiving member 46 by a shaft 47a. The receiving member 46 has one end fixed to the chain 40 by a bracket 46a, and has a receiving surface 46b at the other end. The holding member 47 has a shape similar to a U-shape, and one end serves as a claw portion 47b that approaches and separates from the receiving surface 46b.
The other end serves as an operating portion 47c for performing an opening operation. The receiving member 46 and the pressing member 47 are provided with pins 46d, 47d, and these pins 46d,
A coil spring 49 is hung between 47d. The coil spring 49 maintains the closed and open states of the pressing member 47, respectively. Note that the receiving member 46 is formed with a stopper portion 46c for locking the pressing member 47 in the open state.

A cutting mechanism 50 for cutting the film 6 is arranged between the rollers 36 and 37. This cutting mechanism 50 has an air cylinder 51 vertically supported by the upper frame 12. A conveyor 13 is attached to the lower end of the rod 51a of the air cylinder 51.
A long support plate 52 is fixed in parallel to the conveyance direction, and on the lower surface of this support plate 52,
A long blunt blade 53 in the conveying direction of the conveyor 13
is fixed. This blade 53 is the guide rope 3
It is located above 8. On both sides of the blade 53,
A pair of pressing members 54 extending in the conveying direction of the conveyor 13 are arranged. This pressing member 54
is supported by a plurality of rods 55 that vertically pass through the support plate 52, and these rods 55
It is urged downward by a coil spring 56 wound around. Below the blade 53 is a receiving member 5.
7 is placed. This receiving member 57 supports the blade 5
3, is supported by the upper frame 12, and has a recess 57a. Further, guide ropes 38 are provided on both wall portions 57b of the receiving member 57.
A slit (not shown) is formed to allow the water to escape.

Further, an operating bracket 58 (chuck operating means) is fixed to both ends of the support plate 52, and is adapted to perform a closing operation of the chuck jig 45 as described later.

As shown in FIG. 1, an expanding mechanism 60 for opening the leading end 6a of the film 6 is provided below the moving mechanism 30. The expanding mechanism 60 includes two sets of adsorbers 61, which are disposed opposite to each other on the left and right sides of the lower part of the vertical descending portion 40b of the chain 40, along the conveyance direction of the conveyor 13. Adsorption device 61
As shown in FIG. 5, it has a large number of holes 61a on mutually opposing surfaces, and also has a port 61b connected to the vacuum suction device.
Vacuum suction can be performed from a.

As shown in FIGS. 5 and 6, the adsorbers 61 can be moved almost horizontally by air cylinders 62 to move toward or away from each other. In detail,
One end of an air cylinder 62 is rotatably connected to the upper end of the lower frame 11 via a bracket 63, and at the tip of the rod 62a of the air cylinder 62, an L-shaped member 64 that is long in the conveyance direction of the conveyor 13 is rotated. movably connected. This L-shaped material 6
A rod 65 is fixed to both ends of the rod 4, and the suction device 61 is fixed to the tip of the rod 65. Note that each rod 65 is supported by two links 66 that are parallel to each other. These links 66 have upper ends rotatably connected to the upper frame 12, and lower ends rotatably connected to the rods 65.

As shown in Figures 5 and 6, the adsorption device 6 on the right side
1 has an actuation bracket 67 (release actuation means) fixed thereto. This operating bracket 67 is for opening the chuck jig 45 mentioned above.

As shown in FIGS. 1 and 2, the lowering mechanism 70 is arranged on both sides of the conveyor 13, and has four shafts 7 parallel to the conveying direction of the conveyor 13.
1, 72, 73, and 74. A pair of sprockets 7 are provided at both ends of each shaft 71 to 74.
5, 76, 77, and 78 are fixed. Also,
A dogleg-shaped guide rail 79 is arranged between the sprockets 75 and 78. A chain 80 is stretched between each set of sprockets 75 to 78 and guide rail 79. Each chain 80 is
First vertical descending section 80 between sprockets 77 and 78
a, an inclined descending part 80b and a second vertically descending part 80c between sprockets 78 and 75, a vertically rising part 80d between sprockets 75 and 76, and an inclined rising part 80e between sprockets 76 and 77. .

A part of the first vertical descending part 80a is shown in FIGS.
It is guided by a pair of guide rails 81 shown in the figure. Note that this guide rail 81 is omitted in FIG. 1 to simplify the drawing. Further, as shown in FIG. 1, in the second vertical descending section 80c,
It is guided by the guide rail 79 and a guide rail 82 parallel thereto. Further, the vertically rising portion 80d is also guided by a pair of guide rails 83. Each guide rail 79, 81, 82, 8
3 is attached to a vertical support plate 81 fixed to the lower frame 11, and also plays the role of inhibiting the movement of a receiving member 86 during opening and closing operations of a chuck jig 85, which will be described later.

The lowering mechanism 70 further includes two chuck jigs 85 attached to each chain 80 at equal intervals. As shown in FIGS. 7 and 8, this chuck jig 85 includes a receiving member 86 and a receiving member 86.
6 and a pressing member 87 rotatably supported by a shaft 87a. The receiving member 86 is fixed to the chain 80 by a bracket 86a, and the receiving surface 86 is fixed to the chain 80 by a bracket 86a.
6b. The holding member 87 has a shape similar to an L-shape, and has one end serving as a claw portion 87b that moves toward and away from the receiving surface 86b, and an operating pin 87c for opening and closing operation is fixed to the other end. The receiving member 86 and the holding member 87 are provided with pins 86d and 87.
d, and a coil spring 89 is hung between these pins 86d and 87d. This coil spring 89 maintains the closed and open states of the pressing member 87, respectively. Note that the receiving member 86 is provided with a stopper pin 86c for locking the pressing member 87 in the open state.

The chuck jig 85 is configured to be closed by an air cylinder 90 shown in FIGS. 7 and 8. Specifically, the air cylinder 90 is connected to the upper end of the lower frame 11 via a bracket 91.
One end of the air cylinder 90 is rotatably connected, and the tip of the rod 90a of the air cylinder 90 is rotatably connected to a long L-shaped member 93 via a bracket 92. Arms 9 are attached to both ends of this L-shaped member 93.
An L-shaped actuation bracket 95 is fixed through the chuck jig 85, and this actuation bracket 95 acts on the actuation pin 87c of the chuck jig 85 as described later. Note that the upper end of the arm 94 is rotatably supported by the upper frame 12.

As shown in FIG. 1, the guide rail 79,
An operating member 96 for temporarily opening the chuck jig 85 is arranged near the bottom of the chuck jig 82 . This actuating member 96 has a relatively gentle slope 96a. Further, an operating member 97 for completely opening the chuck jig 85 is arranged below the pair of guide rails 83. This operating member 97
has a slope 97a that is steeper than the slope 96a of the actuating member 96.

The pushing mechanism 98 for pushing the bag 9 into the box 1 is
It has four downward air jetting nozzles 99 arranged above the adsorber 51. nozzle 99
is connected to a compressed air source (not shown).

Here, the chuck jig 45 of the moving mechanism 30, the suction device 61 of the expanding mechanism 60, and the lowering mechanism 70 described above are used.
The positional relationship between the chuck jig 85 and the nozzle 99 will be explained based on FIG. 13. conveyor 1
The chuck jig 45 is at the farthest position from the box 1 which is stopped at the center of the box 3. The suction device 61 is disposed between the chuck jig 45 and the chuck jig 85, but is located outside the side wall 1b of the box 1 when viewed from above. The chuck jig 85 is located almost directly above the outer surface of the side wall 1b of the box 1b. Also, the nozzle 99 is connected to the conveyor 1 inside the box 1.
3 and near the side wall 1b of the box 1 perpendicular to the transport direction.

The support mechanism 20, moving mechanism 30, and lowering mechanism 70 described above are driven by a motor 100 with an electromagnetic clutch shown in FIG. Specifically, a shaft 101 is connected to the motor 100 via a transmission mechanism (not shown), and there is a sprocket 102 fixed to the shaft 101 and a sprocket 103 fixed to the shaft 73 described above. , chain 10
4 is crossed. As a result, motor 100
is rotated by the shaft 73 via the chain 104 etc.
The chain 80 of the lowering mechanism 70 on the left side in the figure is driven.

Further, a gear 105 is fixed to the shaft 73, and a gear 106 fixed to the shaft 73 of the right lowering mechanism 70 is meshed with this gear 105. As a result, the gears 105, 106
The chain 80 of the lowering mechanism 70 on the right side is also driven synchronously via the lowering mechanism 70 .

In addition, the shaft 73 of the lowering mechanism 70 on the right side has
Moving mechanism 3 via gears 107, 108, 109
0 shaft 33 is connected, and as a result,
In synchronization with the lowering mechanism 70, the chain 40 of the moving mechanism 30 is driven, and the rollers 35, 3
6, 37 are rotated.

The shafts 22 and 23 of the support mechanism 20 are connected to the lower shaft 71 of the lowering mechanism 70 on the right side via sprockets 111, 112, 113, 114 and chains 115, 116.
As a result, the rollers 24 and 25 of the support mechanism 20 are
It is rotated in synchronization with the lowering mechanism 70.

In the above configuration, the film roll 5 is set on the support mechanism 20. First, the lever 29 is turned toward the housing 21, and the rod 28 connected to the lever 29 is inserted into the holes in the support brackets 26 and 27. As a result, the rod 28 is connected to the slit 21.
It will be in a state where it crosses a. Next, the shaft 5a of the film roll 5 is inserted from above to the middle of the slit 21a and placed on both rods 28. Then, pull out the film 6 from the film roll 5,
The tip 6a is inserted between the roller 35 and the pressing roller 39 of the moving mechanism 30, and further placed on the guide rope 38. The tip 6a of this film 6
is located directly below the blade 53 of the cutting mechanism 50.

When the film 6 is pulled out as described above, the film roll 5 rotates. At this time, motor 10
Roller 2 whose rotation is prohibited by the brake of 0
If the film roll 5 is placed on the rollers 4 and 25, the rotation of the film roll 5 will not be smooth due to friction with the rollers 24 and 25, and the film 6 will stretch or break. is placed on the rod 28 and the roller 24,
25, smooth rotation is possible, and the inconvenience of stretching or cutting the film 6 does not occur.

After the above setting is completed, the lever 29 is turned in the opposite direction to the above, and the tip of the rod 28 is moved back to one of the brackets 27. As a result, the film roll 5 is detached from the rod 28 and the rollers 24, 2
It will be listed on 5.

On the other hand, the box 1 is placed on one end of the conveyor 13 and conveyed to the center of the conveyor 13, where it is stopped by a stopper (not shown).

The motor 100 is constantly rotating, and when the clutch is disengaged, the chain 40 of the moving mechanism 30, the chain 80 of the lowering mechanism 70, etc. are stopped. At this stop, as shown in FIG. 1, the chuck jig 45 of the moving mechanism 30
One of them is located in front of the cutting mechanism 50 in the horizontal moving part 40a, and the other chuck jig 4
5 is located slightly above the suction device 61 in the vertical descending section 40b, and the remaining chuck jig 45 is located in the inclined ascending section 40c. In addition, the lowering mechanism 70
One of the chuck jigs 85 is connected to the first vertical descending part 8.
Located slightly below the adsorber 61 at 0a,
The other one is the actuating member 9 at the vertically rising portion 80d.
It is located slightly lower than 7.

At the end of the above-mentioned stop period, the air cylinder 51 of the cutting mechanism 50 is driven to extend the rod 51a downward and the film 6 is cut. Note that the cutting will be explained in detail later. At the time of this cutting, the pair of support brackets 58 are lowered, pushing the claws 47b of the opened chuck jig 45 and forcing it down onto the receiving surface 46b, as shown in FIG. As a result, the pair of chuck jigs 45 grip both side edges of the film 6 in the vicinity of the leading end 6a. This gripping position is a predetermined distance away from the tip 6a formed by cutting.

Next, the clutch of motor 100 is engaged for a predetermined period of time. As a result, in the moving mechanism 30, the roller 35 is rotated by the drive of the motor 100, and the film 6 sandwiched between the roller 35 and the pressing roller 39 is sent toward the cutting mechanism 50. Also, by driving the chain 40, the leading end 6a of the film 6 is
The chuck jig 45 gripping the vicinity of the chuck jig 45 is moved to the left by the horizontal moving part 40a, and further lowered by the vertical lowering part 40b. As a result, the tip 6a of the film 6 reaches a predetermined height directly above the box 1. In synchronization with this, the chain 80 of the lowering mechanism 70 is driven, and one chuck jig 85 reaches the first vertical lowering part 80a and stops. The receiving surface 86b of the chuck jig 85 and the tip 6a of the film 6 are approximately at the same height.

As described above, by feeding the leading end of the film 6 while gripping it with the chuck jig 45, it can be accurately fed to the height of the receiving surface 86b of the chuck jig 85, and as described later, the film 6 can be transferred reliably. can be done. In addition, chuck jig 45
Since the film 6 can be accurately fed by a predetermined amount, the perforation 7 can be accurately aligned with the blade 53 of the cutting mechanism 50.

In the process of feeding the film 6, the area from the gripping position of the chuck jig 45 to the tip 6a is not restrained, but this area is placed on the guide rope 38 that rotates at the same speed as the chain 40, so it may not break. Sent without shrinkage.

Further, when the film 6 is fed by the chuck jig 45, the roller 35, and the press roller 39, the support mechanism 20 rotates the film roll 5 by rotating the rollers 24, 25 at approximately the same circumferential speed as the chain 40. , no large tensile force is applied during the above-mentioned feeding, and cutting at the perforation 7 does not occur. Note that by making the circumferential speed of this roller 24 slightly slower than the speed of the chain 40,
It is also effective to generate a small tensile force on the film 6 to prevent loosening.

After the leading end 6a of the film 6 has been fed to a predetermined height, the clutch of the motor 100 is disengaged as described above to stop driving the chain 40 and the like. At this stop, the first vertical descending section 80a
In the vicinity of , the arrangement is as shown in FIGS. 9 and 13. That is, the adsorber 61 is attached to the tip 6 of the film 6.
They are placed slightly above point a and spaced apart from each other to the left and right. Further, chuck jigs 85 are disposed on the left and right sides of the leading end 6a of the film 6 in an open state.

Immediately after the chain 40 and the like are stopped, the air cylinder 62 of the expanding mechanism 60 is driven to extend the rod 62a and move the pair of adsorbers 61 closer to the film 6 as shown in FIGS. 10 and 14.

During this process, the actuating bracket 67 attached to the suction device 61 on the right side in FIG.
, and release the claw portion 47b from the receiving surface 46b. As a result, the portion near the leading end 6a of the film 6 is released from being held by the chuck jig 45.

Next, the tip 6a of the film 6 is placed in the suction device 61.
After vacuum adsorbing both sides of the vicinity of the adsorbers 61, the air cylinder 62 is driven again to retract the rod 62a, and the adsorbers 61 are separated from each other as shown in FIGS. 11 and 15. In this process, both sides of the leading end 6a of the film 6 are expanded.

The portions near the tip 6a of the bag 6 spread out by the suction device 61 as described above contact or reach a position close to the receiving surfaces 86b of the pair of chuck jigs 85, respectively.

Next, the air cylinder 90 is driven to move the rod 90a backward, and the operating pin 87c of the chuck jig 85 is hooked on the operating bracket 95, and the holding member 87 is rotated to release the claw part as shown in FIG. 8
7b to the receiving surface 86b. As a result, film 6
A portion near the tip 6a of is gripped by a chuck jig 85. Immediately after this, the suction action of the adsorber 61 is stopped.

At the final stage of the stop period, the air cylinder 51 of the cutting mechanism 50 is driven to extend the rod 51a and lower the support plate 52. During this lowering process, the pressing member 54 first presses both sides of the perforation 7 of the film 6, and then the blade 53 presses the perforation 7 to cut it. As a result, the bag 9 has an independent section from the tip 6a gripped by the chuck jig 85 at the first vertically descending section 80a to this cut point.
becomes. The bag 9 has an open end 9a and a closed end 9b. The open end 9a is the same as the tip 6a of the film 6 described above, and the closed end 9b corresponds to the welded portion 8 near the cut point. The cut point becomes the leading end 6a of the film 6 to be sent next.

After the cutting, the clutch of the motor 100 is engaged to drive the chain 80 and the like. Then,
A chuck jig 85 gripping the vicinity of the opening end 9a
vertically descends to sprocket 78. During this process, air injection is started from the nozzle 99,
Blow into bag 9. As a result, bag 9 is turned over,
A chuck jig 85 is shown as an imaginary line A in FIG.
The closed end 9b hangs downward from the box 1, and the closed end 9b enters the box 1.

When the chuck jig 85 passes the sprocket 78, it reaches the inclined descending part 80b of the chain 80,
Here, since the chuck jig 85 moves diagonally downward, the open end 9a of the bag 9 descends while being spread. Air continues to be blown during this process, and the chuck jig 85 is connected to the sprocket 78.
1, the closed end 9b of the bag 9 touches the ground approximately at the center of the bottom 1a of the box 1, as shown by the imaginary line B in FIG. In the process of the chuck jig 85 moving diagonally downward, the bag 9 is pressed against the bottom 1a of the box 1 by air pressure and comes into close contact with the bottom 1a of the box 1, as shown by the imaginary line C in FIG. It gradually increases. Furthermore, as shown by the imaginary line D, after the bag 9 is in close contact with the entire bottom part 1a of the box 1,
It is in close contact with the entire side wall 1b.

As described above, air is continuously blown in the process of the opening end 9a descending, and the bag 9 gradually comes into close contact with the side wall 1b from the center of the bottom 1a of the box 1. The air in the box 1 is gradually pushed out from between the bag 9 and the side wall 1b of the box 1, and the pressure of the remaining air in the box 1 causes the bag 9 to
There is no inconvenience caused by improper attachment of bag 9 to box 1.
It can be attached securely to the inner surface of the

When the chuck jig 85 reaches the vicinity of the bent portion of the guide 79, the close contact of the bag 9 with the box 1 is almost completed.

When the chuck jig 85 passes through the bent part of the guide rail 79, the open end 9a of the bag 9 is expanded with almost no loosening, and its cross-sectional shape matches the outer shape of the box 1, as shown in FIG. It is slightly larger.

Next, the chuck jig 85 vertically descends at the second vertically descending portion 80c of the chain 80 and reaches the outer periphery below the upper end of the box 1, thereby causing the bag 9
The open end 9a of the box 1 is folded back to the outside of the box 1 as shown by an imaginary line E.

Next, the chuck jig 85 is moved to the second vertical descending part 80.
The bag 9 reaches the actuating member 96 c, and the actuating pin 87 c hits the inclined surface 96 a of the actuating member 96 to temporarily open the bag 9 and release the grip on the open end 9 a of the bag 9 . Almost at the same time as this gripping is released, the air injection from the nozzle 99 is stopped. Note that since the chuck jig 85 is temporarily opened and immediately closed, the holding member 87 does not hit the conveyor 13 or the like during the process of passing through the conveyor 13.

Next, the chuck jig 85 turns upward after passing the sprocket 75 and stops before the operating member 97. At this time, the other chuck jig 85 is again on standby at the first vertically descending portion 80a of the chain 80, as shown in FIG.

When the next chain 80 is driven, the chuck jig 8
5 is raised on the vertically rising portion 80d, the operating pin 87c hits the inclined surface 97a of the operating member 97, and the chuck jig 85 is opened.

After completing the attachment of the bag 9 to the box 1, the box 1 is released from the stopper, and the box 1 is carried out by a conveyor 13 and further conveyed to a destination, for example, a food packing work place, by another conveyor.

The present invention is not limited to the above embodiments, and various embodiments are possible. For example, the timing of air blowing can be selected as appropriate.

In addition, instead of pushing the bag into the inside of the box by blowing air, the bag is placed on the box using a descending mechanism and then sent to another location by a conveyor, where the bag is pushed inside the box by a pushing mechanism equipped with an elevating ram, etc. You can also push it in.

By raising the box without moving the open end of the unfolded bag, the open end of the bag may be relatively lowered to the position of the outer periphery of the box.

Furthermore, after the opening end of the bag is fully opened by the expanding mechanism, it may be lowered vertically by the lowering mechanism, or it may be lowered by a small amount during the process of expansion by the expanding mechanism.

The film may be cut before it is expanded. In this case, the expanding mechanism widens the open end of the independent bag by cutting. Note that in this specification, the film is not limited to a long film, and may also mean an independent bag.

Furthermore, in this specification, the term "near the tip of the film" means not only the tip but also the region up to a portion separated by a permissible distance from the tip.

The film does not need to have perforations and welded parts formed in advance, but may simply be a cylindrical film that is folded. In this case, the cutting mechanism includes a cutter or the like and heat welding means.

(Effects of the Invention) As explained above, the apparatus of the present invention can automatically and efficiently attach bags to boxes. Moreover, by grasping and feeding the vicinity of the leading edge of the film pulled out from the film roll using the chuck jig of the moving mechanism, the leading edge can be accurately positioned at a predetermined height and can be prevented from shaking due to air currents. It can be prevented. Therefore, the leading end of the film can be reliably transferred from the chuck jig to the expanding mechanism, and in turn, can be reliably transferred to the chuck jig of the lowering mechanism.

[Brief explanation of the drawing]

1 to 16 show an embodiment of the present invention,
Fig. 1 is a front view of the bag mounting device, Fig. 2 is a perspective view showing some mechanisms of the bag mounting device, Fig. 3 is a perspective view of the film, and Fig. 4 shows the chuck jig of the moving mechanism. 5 is a front view showing the expanding mechanism, FIG. 6 is a plan view showing the chuck jig of the expanding mechanism and moving mechanism, and FIG. 7 is a chuck jig of the lowering mechanism and the chuck jig for closing it. A front view showing the mechanism, Figure 8 is a plan view of the same, and Figures 9 to 12 show the process of transferring the tip of the bag from the chuck jig of the moving mechanism to the suction device and from the suction device to the chuck jig of the lowering mechanism. FIGS. 13 to 16 are front views showing the steps in order, and FIGS. 13 to 16 are plan views showing the same process in order. Further, FIGS. 17 to 19 are cross-sectional views illustrating a conventional bag mounting method step by step. 1...Box, 5...Film roll, 6...Film,
9... Bag, 20... Support mechanism, 30... Moving mechanism, 40
...Driving means (chain as an endless strip), 45
... chuck jig, 50... cutting mechanism, 58... chuck operating means (operating bracket), 60... expanding mechanism,
61...Adsorption device, 67...Release operation means (operation bracket), 70...Descent mechanism, 85...Chuck jig,
98...Pushing mechanism, 99...Nozzle.

Claims (1)

[Scope of Claims] 1. (a) A support mechanism for supporting a film roll formed by winding a cylindrical film folded flat; (c) a moving mechanism that positions the film at a predetermined height directly above the opened box; (c) an expanding mechanism that uses at least a pair of suckers to suck both sides of the film near the tip and spread it; (d) (e) a descending mechanism that positions the tip of the film on the outer periphery of the box by gripping the vicinity of the tip of the film spread by the spreading mechanism with a chuck jig and lowering it relative to the box; A bag mounting device comprising: a cutting mechanism for cutting the film to obtain independent bags; and (f) a nozzle disposed above the box for blowing air downward to push the bag into the box The moving mechanism includes: (i) a chuck jig; (ii) a drive means for moving the chuck jig along an endless locus of movement including a vertical downward locus located directly above the box; and (iii) a chuck jig. (iv) chuck actuating means for activating a chuck jig to grasp the vicinity of the leading end of the film at a position before the vertical downward trajectory in the movement trajectory; The part near the tip of the film gripped by the tool descends along a vertical downward trajectory and reaches the above-mentioned predetermined height, and is placed between the adsorbers in the open state, after which the adsorber adsorbs the part near the tip of the film. 1. A bag mounting device comprising a release actuation means for operating a chuck jig to release a portion near the leading end of the film before the film is opened. 2 The driving means of the moving mechanism includes a pair of endless strips, each endless strip has a plurality of chuck jigs attached thereto, and the pair of chuck jigs of the pair of endless strips move vertically downwardly. Claim 1, characterized in that when the film is in a position to release a portion near the leading end of the film, the other pair of chuck jigs are in a position to grip a portion that will newly become a portion near the leading end of the film. bag attachment device. 3. According to claim 1, the release operation means is constituted by a member integral with the suction device, and the chuck jig is released by this member in the process of the suction devices approaching each other. Bag attachment device as described.