JPS6278029A - Method and device for mounting bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method and apparatus 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 plastic bag is attached to the box. This prevents the inside of the box from becoming soiled, and also allows stores and customers to take out the food in its bag and collect the delivered box on the spot.

The bag was attached manually. First, the 19th
As shown in the figure, the closed end 5b of the bag 5 is pushed into the box 1. Next, as shown in FIG. 20, the opening edge 5a of the bag 5 is
Fold it outward and attach it to the outer periphery of Box 1. Finally, as shown in FIG. 21, the bag 5 is attached to the inner surface of the box 1.

(Problems to be Solved by the Invention) In the above method, the work of folding the opening edge 5a of the bag 5 to the outside of the box 1 requires skill, labor, and effort. Furthermore, although the opening area of the bag 5 is slightly larger than the area of the planar shape of the box 1, since it is necessary to fit the bag 5 tightly onto the box 1, there is not much play. This made the folding work of 5a more difficult. Also,
If the above method is to be automated, the folding step will make the structure very complicated.

(Means for Solving the Problems) The present invention has been made to solve the above problems.
The gist of this method is to attach a bag to a box with an open top by placing the bag with the opening edge facing down and lowering the opening edge relative to the box to the outer periphery of the box. A bag mounting method is characterized by comprising the steps of putting the bag over the box and pushing the bag into the box.

Another gist of the present invention is that in a device for attaching bags to a box with an open top, a bag hanging machine and a bag pushing device are used. A supply (candidate) that supplies a folded bag with its opening edge facing down above the box; (b) an expanding mechanism that sucks the opening edge of the bag from both sides and expands it; and (h) ) A lowering mechanism that grips the opening edge of the bag expanded by the expansion mechanism and lowers it to a position on the outer periphery of the box, and the bag pusher has a ram that can be raised and lowered; There is a bag mounting device characterized in that it is configured to lower the bag and push the bag into the box.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 13. Reference numeral 10 in FIGS. 1 and 2 indicates a conveyor for conveying a box 1 made of, for example, styrofoam. A pair of chains 14 with rollers 13 are disposed within this frame 12, and are run by sprockets (not shown).

Along the conveyor 10, a bag rack machine 20 and a bag pusher 90 are arranged.

The bag hanger 20 has a supply mechanism 30 that feeds a plastic bag 5 in a flat folded state with its opening edge 5a facing down, and a supply mechanism 30 that sucks the opening edge 5a of the folded bag 5 from both sides. It is provided with an expanding mechanism 50 that expands the bag 5, and a lowering mechanism 70 that grips the opening edge 5a of the bag 5 expanded by the expanding mechanism 50 and lowers it to a position on the outer periphery of the box 1.

The supply mechanism 30 is arranged above the conveyor 10. In the figure, 31 is the shaft 7), and this shaft has
A film roll 7 is inserted and supported. This film roll 7 is a long vinyl film 6 having a cylindrical shape.
It is constructed by rolling it in a folded state. Both ends of the shaft 31 are placed on a pair of inclined supports 32 (only one of which is shown). A supporting roller 33 is rotatably arranged between the members 32 of the receiver.

This support roller 33 has an inclined support that supports the film roll 7 that moves obliquely downward along the material 32 due to its own weight. Note that guide flanges 33a are provided at both ends of the support roller 33 to guide both side edges of the film 6 being fed out from the film roll 7. Further, an inclined guide plate 34 is disposed diagonally above the support roller 33. This guide plate 34 guides the film 6 diagonally upward. Bent guide flanges 34a are formed on both sides of the guide plate 34 to guide both side edges of the film 6.

A pair of feed rollers 35 that are in contact with each other are arranged near the upper end of the guide plate 34 . The feed roller 35 has an axis parallel to the conveyance direction of the conveyor 10 and is located directly above the center of the conveyor 10. Furthermore, another pair of feed rollers 36 that are in contact with each other are arranged directly below this feed roller 35. These feed rollers 35,
36 rotates in the direction of the arrow in FIG. 2 to pull out the film 6 from the film roll 7 and feed it directly downward toward the conveyor 10.

A plate 37 is disposed between the rollers 35 and 36, and a cutter 38 is disposed opposite the plate 37.
a and the heated sealing member 38b are arranged so as to be separable. These counters 38a and seal member 3
8b is fixed to the support plate 38c. This support plate 3
8c is connected to the tip of the rond 39a of the air cylinder 39.

Then, by operating the air cylinder 39, the cutter 38a and the seal member 38) are brought into contact with the plate 37, so that the film 6 is welded and cut to obtain an independent bag 5. .

Note that in this specification, not only the bag 5 that is separated from the film 6 and becomes independent, but also the portion near the tip of the film 6 (the portion that will become an independent bag 5 by cutting) is recognized as a bag, and the The middle code 5 shall be added.

The feed rollers 35, 36 are rotated by the following drive system. The dow 40 is a motor, and a gear 41 is fixed to an output shaft 40a of the motor 40. This gear 4
]: One end of the swing link 42 is rotatably connected at a position away from the center. The other end of the swing link 42 is rotatably connected to one end of a rack 43. This rack 43 is supported so as to be slidable horizontally and in a direction orthogonal to the transport direction of the conveyor 10 by a guide (not shown). A gear 44 is engaged with the rack 43. This gear 44 is connected to a pair of upper feed rollers 35
It is connected via a one-way clutch 45 to one end of a shaft 35a that supports one of the two. Furthermore, gears 46 having the same diameter and meshing with each other are fixed to both ends of each shirt 35a that supports the pair of upper feed rollers 35.

When the gear 41 is rotated by the drive of the motor 40,
This rotation is converted into a reciprocating motion of the rack 43 via the swing link 42, and while the rack 43 moves to the left in FIG. 2 (while the gear 41 makes half a rotation), the gear 44 rotates in one direction. It is transmitted to one shirt 35a via the pull launch 45, and further transmitted to the other shaft 3Sa through the meshing of the gears 46, causing both feed rollers 35 to rotate.

Further, while the rack 43 is moving to the right (the gear 41 is opened by a further half turn), the upper feed roller 35 does not rotate because the gear 44 idles.

Said shirt) 35 supporting a pair of upper feed rollers 35
A boo 947 is fixed to each end of the shirt a, and a boo 1J48 is also fixed to the end of the shirt 36a that supports the pair of lower feed rollers 36. These boo')
A timing belt 49 is passed through each of 47 and 48, so that the lower feed roller 36 rotates in synchronization with the upper feed roller 35.

An expansion groove 50 is arranged below the lower feed roller 36. This expanding mechanism 50 has a pair of long suction members 51 extending in the conveying direction of the conveyor 10. This suction member 51 is attached to a support plate 52 as shown in FIG.
and a suction mechanism 53 provided on the inner vertical surface of the support plate 52. 7+÷dhi↓(;[ra/h;T;
4, l-+1+l knobs 1J, n+r('+, Lt) are provided.The suction mechanism 53 is formed by connecting two vertical plates 55 and 56 via a rubber gasket 54.Vertical plates A chamber 57 is formed between 55 and 56. This chamber 57
A pump (not shown) is connected to the pump via a pipe 58. One vertical plate 56 is fixed to the support plate 51, and the vertical plate 56 has a large number of small suction bow holes 5.
6a is formed. The opening edge 5a of the bag 5 can be attracted to the surface of the vertical plate 56 by suctioning from the suction hole 56a through the υ chamber '57 by the operation of the pump.

Each suction member 51 is moved toward or away from each other by a link mechanism 60 disposed at both ends thereof. Each link mechanism 60 has an arm 5 of the suction member 51.
2a and a shirt supporting the lower feed roller 36) 36a
It is comprised of a gear 61 rotatably supported by the gear 61 and two links 62 whose upper and lower ends are fixed to the gear 61 and @52a. The gears 61 of both gears 60 are in mesh with each other. On the other hand, the gear 41 mentioned above is
A gear 63 with the same diameter is engaged with this gear, and this gear 63
is rotatably connected to one end of a swing link 64 at a position away from the center, and the other end of this swing link 64 is rotatably connected to one link (link 62 of the remaining structure 60). Then, when the gear 63 is rotated via the gear 41 by the drive of the motor 40 described above, one link mechanism 60' rotates back and forth around the shirt 36a within a predetermined angle range, and furthermore, the gear 61 Due to their engagement, the other one-length link 60 also rotates back and forth at the same angle, thereby causing the pair of adsorption members 51 to approach or separate.

Lowering mechanisms 70 are arranged on both sides of the conveyor 10. To be more specific, a driving shaft 71 is arranged obliquely above the conveyor 10, and a driven shaft 7) is placed directly below this driving shaft 71. 2 (Fig. 1) are arranged. Sprockets 73° and 74 are fixed to both ends of the driving shaft 71 and the driven shaft 7Y72, respectively, and a chain 75 is hooked around the sprockets 73° and 74. In addition, these sprockets) 73, 74. chain 7
5 is illustrated in a simplified manner. Each chain 75 is provided with two sets of grips 76 for gripping the opening edge 5a of the bag 5.

The gripping number structure 76 is shown in FIGS. 10 to 12. That is, the chain 75 supports the receiving plate 77,
A presser claw 79 is supported on the receiving plate 77 via a hinge 78 so as to be openable and closable.

The pressing pawl 79 and an operating lever 80 are fixed to the shaft 78a of the hinge 78, and both rotate integrally. A coil spring 81 is hooked between a pin 82 provided on the side surface of the receiving plate 77 and a pin 83 provided on the side surface of the proximal end of the presser claws 7 and 9. 81 urges the holding pawl 79. A friction member 84 made of rubber or the like is attached to the tip of the holding claw 79 on the surface facing the receiving plate 77 .

As shown in FIG. 2, a pulley 85 is fixed to one end of the driving shaft 71, and the timing belt 49 mentioned above is passed around the pulley 85. Thereby, the driving shaft 71 rotates in synchronization with the feed rollers 35 and 36.

A rod-shaped detachment member 86 is attached to the upper surface of both sides of the frame 12 of the conveyor 10, located between the two chains 75. This detachment member 86 is for detaching the opening edge 5a of the bag 5 from the gripping mechanism 76.

Further, as shown in FIGS. 3 to 5, a return member 87 is disposed near the chain 75 for turning the operating lever 80 to return the holding pawl 79 to the open state.

As shown in the second section, the frame 12 of the conveyor 10 is formed with four parts 15 at opposing positions of the chains 75, through which the gripping mechanism 76 is inserted. Further, a stopper 16 is disposed on the conveyor 10 between the pair of chains 12 so as to be movable up and down.

Cry IF] 1- 禾su ) Chi 1- Daikon 14
It has an inverted-shaped main body 91 installed on the side of the conveyor 10, and a ram 92 supported at the upper end of this main body so as to be movable up and down. This ram 92 has a head portion 93 at its lower end whose cross-sectional area is slightly smaller than the inner shape of the box 1.
It is located directly above 0. The mechanism for raising and lowering the ram 92 is the same as that of a general press, so its explanation will be omitted.

In the above configuration, the box 1 placed on the roller 13 of the conveyor 10 is stopped by the stopper 16 at the position of the machine 20. The motor 40 is continuously driven to rotate, and when the gear 41 rotates half a rotation, the swing link 42 and the rack 43 move leftward from the right position to the leftmost position in FIG. During this time, the feed roller 35 rotates as described above, and the feed roller 36 rotates via the timing belt 49. As a result, the film 6 is continuously pulled out from the film roll 7, and the portion near the tip of the film 6, that is, the bag 5 before separation is supplied directly above the box 1.

At this time, as shown in Figures 2, 3, and 7, the expansion (
A pair of suction members 51 of the private insurance company 50 are moving in the closing direction. The opening edge 5 of the bag 5 is located between these suction members 51.
When a enters and its lowermost end is sent to a position below the suction member 51, the gear 41 shifts to the next half rotation. That is, the swing link 42 and the rack 43 begin to move rightward from the leftmost position to the rightmost position.

This movement is carried out by the one-way clutch 45
36, the feeding of the bag 5 is stopped.

Also, the feed roller 3 is connected via a timing belt 49.
5.36, the lowering mechanism 70 also stops. In this stopped state, the operating lever '-80 of the gripping mechanism 76 is located on the movement trajectory A of the suction member 51, as shown in FIG.

When the swing link 42 and the rack 43 begin to move to the left, the other swing link 64 is still moving to the right, and when this swing link 64 reaches the rightmost position, , the suction members 51 are in the closest position to each other. At this time, the suction member 51 starts the suction action, and the bag 5
The opening edge 5a of is suctioned from both sides. Next, the swing link 64 starts moving to the left, and the adsorption members 51 are moved away from each other. In this process, as shown in FIG. 8, the opening edge 5a that has been sucked by the suction member 51 is opened.

While the suction members 51 are moving away from each other, the air cylinder 39 is activated and the cutter 38a cuts the long film 6 to obtain an independent bag 5, and the cutter 38a cuts the long film 6. A closed end portion 5b is formed in the bag 5 by welding with the seal member 38b.

At the end of the process in which the suction members 51 move away from each other, the gripping mechanism 76 is activated as follows.

As shown in FIG. 10, the tip of the holding claw 79 of the gripping mechanism 76 is separated from the receiving plate 77 and is open. The coil spring 81 is located on the left side of the shaft 78a, and the tensile force of the fill spring 81 urges the presser claw 79 in the clockwise direction so that its base end comes into contact with the receiving plate 77, thereby opening the presser claw 79. The default state is maintained. When the suction member 51 moves and its lower end hits the operating lever 80 of the gripping mechanism 76, the operating lever 80 rotates counterclockwise in the figure against the fill spring 81. Then, the presser claw 79 also rotates in the same direction in conjunction with the operating lever 80, and the coil spring 81 eventually passes over the shaft 78a as shown in FIG. The moment it crosses over, the holding claw 79 is released by the tensile force of the fill spring 81.
is rotated in the counterclockwise direction, and its tip portion contacts the receiving plate 77 and closes as shown in FIG.

At this time, the opening edge 5a of the bag 5, which was located between the receiving plate 77 and the holding pawl 79, is sandwiched between the friction member 34 of the holding pawl 79 and the receiving plate 77. It should be noted that the @ attachment member 51 stops suctioning the opening edge 5a of the bag 5 immediately after gripping the opening edge 5a with the presser claw 79, moves a little further, and then stops. 64 is located on the far right). Immediately after gripping the opening edge 5a of the bag 5 with the gripping mechanism 76, the JA self ``↓ bond (n you OFFA + m 壬λ pattern gro 1
As is clear from the diagram of the candy, the opening edge 5a of the bag 5
are expanded with almost no loosening by the presser claws 79, and their cross-sectional shape is slightly larger than the outer shape of the box 1.

Immediately after the gripping mechanism 76 grips the opening edge 5a of the bag 5 as described above, the swing link 42 and the rack 43 begin to move rightward, and as a result, as described above, the feed rollers 35 and 36 Feeding of the film 6 is started. Further, as the chain 75 starts rotating via the timing belt 49, the opening edge 5a of the bag 5 descends while being gripped by the gripping mechanism 76, as shown in FIG.
As a result, the bag 5 is placed over the box 1. Eventually, the opening edge 5a reaches the detachment member 86 and is prevented from descending, and the gripping state by the gripping mechanism 76 is forcibly released. The gripping mechanism 76 with the presser claws 79 closed passes through the four parts 15 formed in the frame 12, goes around the lower sprocket 74, and stops at a position a predetermined distance above the lower sprocket 74. At this time, the other gripping mechanism 76 moves along the movement trajectory A of the suction member 51 as shown in FIG.
Located in During this process, the actuating lever 80 moves to the return member 8.
7, the suction member 51 is rotated in the opposite direction to the direction in which it hits, and as a result, the presser pawl 79 is returned from the closed state shown in FIG. 12 to the open state shown in FIG. 10.

Immediately after the bag 5 is placed on the box 1 and the opening edge 5a of the bag 5 is removed from the gripping mechanism 76 by the detachment member 86, the stopper 16 is lowered to move the box 1 up the conveyor 10 and push the bag toward the shore 90. Transport to. This box 1 is located at the position of the bag pusher 90 with a stopper (
(not shown). Next, the ram 92 descends and pushes the bag 5 into the box 1 with the head portion 93.
Attach it to the inside of the body.

In this embodiment, in the bag hook 8!20, the supply mechanism 30
．． Expansion mechanism 50. The lowering mechanism 70 moves in conjunction with gears, a timing bell) 49, etc., and therefore only one motor 40 is required as a driving source, and no complicated electronic control is required.

The present invention is not limited to the above embodiments, and various strains are possible. For example, the supply mechanism 30. Expanding mechanism 50, lowering mechanism 7
0 may be operated by independent drive systems, and the coordinated movement of each mechanism may be performed by electronic control. Further, the timing to cut the film 6 to obtain the independent bag 5 may be before the opening edge 5a of the bag 5 is sucked by the expanding mechanism 50, or after the opening edge 5a is gripped by the lowering mechanism 70. Depending on the case, it may be after the opening edge 5a has finished lowering.

Furthermore, in the process of covering the bag with the box, the opening edge of the bag may be relatively lowered to the position of the outer periphery of the box by raising the box without moving the opening edge of the bag.

14 to 18 show other embodiments of the bag hanging machine, and the major difference from the previous embodiment is the lowering mechanism 70.
' has the function of widening the opening edge 5a'. Further, in this embodiment, a film 6' having a continuous cylindrical shape is folded, perforations are made in advance at appropriate intervals, and one side of the perforations is welded. Therefore, an independent bag 5' can be obtained by simply pulling this film, so welding and cutting means as in the previous embodiments are not required.

To explain the structure of the above embodiment in detail, as shown in FIG. 14, the feeding mechanism 30' has a pair of feed rollers 35 similar to those of the above embodiment, and a pair of guide plates 101 spaced apart from each other at the bottom thereof. have.

The expansion mechanism 50' has a total of four suction members 51, two on the left and two on the left and right.
These suction members 51' suction each side of the opening edge 5a' of the bag 5' in the folded state at two places and expand it. As a drive system for moving these suction members 51' closer to each other or farther away from each other, the same drive system as in the embodiment described above may be employed. This suction member 51' does not move to the outside of the box 1 as in the previous embodiment, but directly above the box 1, and hands the opening edge 5a' to a gripping mechanism 76', which will be described later.

The lowering mechanism 70' has a dogleg-shaped conveyance path and is located at the top, and a guide 102 with a doglegged vertical section disposed between the sprockets 73 and 74 bends the chain 75 in a dogleg shape. invite. The guide 102 is
As shown in FIG. 18, the cross section is U-shaped, and both side walls 102a and 102b fit between the chain plates 75a of each chain 75, and the chain brake 75
The chain 75 is guided by being in contact with the shaft 75b connecting the chain 75a.

A gripping mechanism 76' is supported on the chain 75. This gripping mechanism 76' is basically similar to the gripping mechanism 76 of the previous embodiment. That is, the shaft 7 is attached to the receiving plate 77'.
A presser claw 79' and an actuating lever 80' integrated therewith are rotatably provided via the lever 8a', and a coil spring 81-' maintains the open and closed states of the presser claw 79'. It has become so. The plate 77' is connected to the shaft 75b of the chain 75 by means of a screw 103.
is fixed.

And Fffi Tobatsuhachi?盫ν↓ Mukashiwa-dōminashihi-sama 1-
The operating lever 80' of the Tsukudamoiso structure 76' or the suction member 5
When the bag 5' is rotated υ by 1', the holding claw 79' holds the bag 5'.
grip the opening edge 5a'. Next, the chain 75 is driven to move the opening edge 5a' diagonally downward. That is, the opening edge 5a' is lowered while being expanded. After the gripping mechanism 76' passes over the force field 102, the opening edge 5
Lower a' vertically.

When the opening edge 5a' moves obliquely downward, the film 6' held by the feed roller 35 is pulled and cut from the perforation (indicated by the dashed line B in FIG. 14), and the bag 5 ' becomes independent from the film 6'. Since the upper end of the independent bag 5' is welded in advance, it becomes a closed end 5b'. The bag 5 is placed over the box 1 by the above-mentioned lowering. The guide plate 101 prevents the cut bag 5' from getting entangled with the upper sprocket 73.

Note that the other configurations are the same as those in the previous embodiment, so the same numbers are given in the drawings and the explanation thereof will be omitted. .

(Effects of the Invention) As explained above, the method of the present invention involves lowering the opening edge of the bag relative to the box to the position of the outer periphery of the box, placing the bag over the box, and then placing the bag over the box. This eliminates the step of folding back the opening edge of the bag, significantly improving work efficiency. In addition, since the device of the present invention supplies bags in a folded state, the bags can be easily and reliably fed with a simple configuration, and the opening edge of the bag is sucked and expanded by the expanding mechanism, and the lowering mechanism By grasping and lowering the bag, you can securely place the bag over the box.

[Brief explanation of drawings]

Figures 1 to 13 show one embodiment of the present invention, Figure 1 is a perspective view with the bag mounting device partially omitted, and Figure 2 shows the hook with the rock partially omitted. The perspective view, Figures 3 to 6 are front views showing the step-by-step process of attaching the bag to the box, and Figures 7 to 9 show the entire process of attaching the bag, from opening the bag to hanging it on the box. Plan views explaining the process step by step, Figures 10 to 12
The figure is a front view explaining step by step the action of gripping the opening edge of an opened bag by the gripping mechanism, Figure 13 is a sectional view of the adsorption member, and Figures 14 to 18 show other embodiments. , FIG. 14 shows a front view of the device, FIG. 15 shows a perspective view of the gripping mechanism in a closed state, FIG. 16 shows a side view of the gripping mechanism in an open state, and FIG. 17 shows a chain supporting the gripping mechanism. FIG. 18 is a cross-sectional view taken along the line X-X in FIG. be.

Claims (2)

[Claims] (1) In the method of attaching a bag to a box with an open top,
The method includes the steps of placing the bag over the box by lowering the opening edge of the bag relative to the box to the position of the outer periphery of the box, and pushing the bag into the box. A bag attachment method featuring: (2) In a device for attaching a bag to a box with an open top,
The bagging machine is equipped with a bagging machine and a bag pushing device, and the bagging machine has (a) a feeding mechanism that feeds the flatly folded bag into the upper part of the box with its opening edge facing down; and (b) the above-mentioned. (c) a lowering mechanism that grasps the opening edge of the bag expanded by the expansion mechanism and lowers it to the outer periphery of the box; A bag loading device, characterized in that the bag pushing machine has a ram that can be raised and lowered, and is configured to lower the ram to push the bag into the box.