JPH0517081B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an automatic bagging device for high-temperature melts, which automatically fills bags with high-temperature melts such as asphalt emulsion.

[Conventional technology]

Asphalt emulsion is molten at a high temperature and filled into paper bags at a fixed weight.The paper bags are sealed and cooled before being shipped from the factory. Conventionally, the bagging method involves placing a paper bag that has been folded flat and has a closed mouth inside a metal transport can, transporting it on a conveyor, and opening the mouth of the paper bag manually just before reaching the injection position. Moreover, the conveyed can was placed on a weighing machine while still being opened by hand, and asphalt emulsion was injected into the paper bag while weighing the conveyed can.

[Problem to be solved by the invention]

Therefore, it was not only dangerous but also time-consuming, which was a major obstacle to full automation. or,
Since the weight is continuously measured from the beginning of injection until the injection of a certain weight is completed, it takes a long time to measure the weight. The purpose of the present invention is to efficiently distribute high-temperature melts such as asphalt emulsion completely automatically and without manual intervention, and to cleanly distribute the high-temperature melts to the bottom corners of the bags without staining the outer surface of the bag with the high-temperature melts. The purpose is to provide an automatic bagging device that can pack bags.

[Means to solve the problem]

As shown in the illustrative drawing, the automatic bagging device according to the present invention includes a large-diameter cylindrical constant volume container 26, and a constant volume container connected to the constant volume container 26 via a conduit 31 and an electromagnetic valve 37. 26, and a lifter 22 that lifts and lowers the transport can 2.
and a bag opening/closing mechanism 44 that opens and closes the opening of the bag 1. The constant volume container 26 has a large-diameter extrusion piston 27 slidably fitted therein in order to receive and extrude a fixed amount of high-temperature melt from a high-temperature melt supply source. The volume injector 32 is installed perpendicularly to the column 38, has a nozzle 40 at its lower end, has a discharge air cylinder 41 attached to its upper end, and is fixed to a piston rod 42 of the air cylinder 41 so that the nozzle 40 is inserted into the inside. A valve piston 39 which opens and closes from the piston is fitted so as to be vertically slidable, and the valve piston 39 and piston rod 42 are provided with air passages 39a and 42a for air injection. The lifter 22 includes a conveyor 23 for loading and unloading the conveyor cans 2, an air cylinder 25 for moving the conveyor up and down to raise and lower the conveyor 23, and a lifter 22 for moving the conveyor cans 2 transferred onto the conveyor 23 to a fixed position below the volume injector 32. It is provided with a stopper 24 for stopping at. The bag opening/closing mechanism 44 attaches a pair of vacuum suction members 51 to each other on an arm 47 which is vertically movably mounted on the support column 38 and which suctions the opening of the bag 1 in the transport can 2 on the lifter 22 from both sides. A bag opening/closing air cylinder 54 is attached to the arm 47 so that the vacuum suction member 51 can move forward and backward, and the vacuum suction member 51 suctions the opening of the bag 1 and raises the bag 1 while keeping it open. In order to insert the nozzle 40 into the mouth of the bag, an air cylinder 59 for vertically moving the bag is provided for vertically moving the arm 47.

[Effect]

The transport can 2 transferred onto the conveyor 23 of the lifter 22 is positioned at a predetermined position below the volume injector 32 by the stopper 24. This transport can 2
The inner bag 1 has its mouth section attached to a set of vacuum suction members 51.
The vacuum suction members 51 are lifted up by the air cylinder 59 for moving the bag up and down while the bag remains open. This causes the nozzle 40 of the volume syringe 32 to be inserted into the mouth of the bag 1. When these vacuum suction members 51 move forward relative to each other, the opening of the bag 1 is closed with the nozzle 40 still inserted. In this state, solenoid valve 3
7 is opened and the high-temperature melt is extruded from the large-diameter cylindrical fixed-volume container 26 by the extrusion piston 27, and a fixed volume of the high-temperature melt is injected into the bag 1 through the volume syringe 32. On the other hand, the conveyor can 2 is lifted by the rise of the conveyor 23 of the lifter 22, and supports the bag 1 from below. After injecting a certain amount, the discharge air cylinder 47 is operated in the volume injector 32 to close the nozzle 40 from the inside with the valve piston 39, and air is injected from the air injection passages 39a and 42a of the valve piston 39 and piston rod 42. Then, by inserting the nozzle 40 into the mouth of the bag 1 and keeping the mouth closed, the high-temperature molten material remaining on the nozzle 40 can be blown off into the bag.

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. As shown in FIG. 8, before the paper bags 1 are fed into the automatic bag filling device according to the present invention, they are placed one by one into a metal transport can 2 while being folded flat. Together with the transport can 2, the bag is sent by the conveyor 3 to an inflator (bag expansion device) 4 shown in FIGS. 9 and 10, where it is inflated and then sent to the present automatic bag filling device. The inflator 4 includes a sliding body 5, and the sliding body 5
The vertical rail 7 is configured to vertically slide along the vertical rail 7 by the operation of the vertical movement air cylinder 6.
is installed on. An air nozzle 8 is vertically attached to the tip of the sliding body 5, and a bag opening mechanism 9 is attached to the vertical rail 7. The bag opening mechanism 9 has an arm 10 protruding from the vertical rail 7 that pivotally supports a fan-shaped drive gear 11 and a driven gear 12 screwed thereto, and drive-side links 13 fixed to the shafts of these gears. and a vacuum suction member 15 at the lower end of the driven link 14, respectively.
The upper end of the drive-side link 13 is connected to the opening/closing air cylinder 16. Each vacuum suction member 15 has a plurality of suction pads 18 fixed to a vacuum pipe 17, and is connected to a blower or a vacuum pump via an air hose 19 to receive air suction. Both vacuum suction members 15 are normally open to each other, and between these vacuum suction members 15 (air nozzle 8
When the paper bag 1 is fed into the paper bag 1, the opening/closing air cylinder 16 is activated, and both the vacuum suction members 15 are once closed to suction the paper bag 1, and then opened again to release the opening of the paper bag 1. . Thereafter, the vertically moving air cylinder 8 is lowered and its opening is inserted into the open paper bag 1. In this state, air is injected into the paper bag 1 from the air nozzle 8 and the paper bag 1
is forced to expand. This automatic bagging device can be roughly divided into figures 1 to 3.
It is comprised of a constant volume filling machine 20 shown in the figure and a weight filling machine 21 shown in FIG. The paper bag 1 inflated as described above is first sent to the constant volume filling machine 20. A plurality of constant volume filling machines 20 (four machines in FIG. 2) are arranged in parallel in the conveying direction of the paper bag 1. One lifter 22 is installed for every two constant volume filling machines 20. The lifter 22 raises and lowers the roller conveyor 3 in a horizontal state using a conveyor vertical movement cylinder 25. A stopper 24 for positioning the conveying can 2 in a fixed position is mounted at a predetermined position in the conveying range of the roller conveyor 23 so as to be movable up and down between an operating position and a retracted position. As shown in FIG. 1, each constant volume filling machine 20 includes a large diameter cylindrical constant volume container 26 and a much smaller diameter vertically cylindrical volume injector 32.
and has. A large diameter extrusion piston 27 connected to a piston rod 29 of an extrusion hydraulic cylinder 28 is slidably fitted into the constant volume container 26. The front chamber 26a and the rear chamber 26b partitioned by the extrusion piston 27 are connected to a branch pipe 30 on the discharge side.
a, 30b and a common conduit 31 to a volume injector 32. Moreover, the front chamber 26a and the rear chamber 26
b is connected to an asphalt emulsion supply source (not shown) via branch pipes 33a, 33b and a common pipe 34 on the supply side. Electromagnetic valves 35a, 35b and 36a, 36b are provided in the middle of the branch pipes 30a, 30b on the discharge side and the branch pipes 33a, 33b on the supply side, respectively, and the extrusion piston 27 moves forward by the operation of the hydraulic cylinder 28. When the asphalt emulsion in the front chamber 26a is pushed out, the rear chamber 2
New asphalt emulsion is introduced into 6b.
Moreover, when the extrusion piston 27 is retreated, the rear chamber 26
At the same time as the asphalt latex in b is pushed out, the asphalt latex flows into the front chamber 26a. The asphalt emulsion pushed out from the front chamber 26a or the rear chamber 26b is transferred to the volume injector 32 by opening the electromagnetic valve 37 provided in the common pipe line 31.
sent to. The volume injector 32 is attached to the column 3 as shown in FIG.
It is installed perpendicularly to 8. This volume syringe 32
has a nozzle 40 at its end, and a discharge air cylinder 41 attached to its lower end. or,
As shown in FIG. 4, a valve piston 39 is fitted into the volume injector 32 so as to be vertically slidable. This valve piston 39 is fixed to the lower end of a piston rod 42 of a discharge air cylinder 41, and is slid up and down by the operation of the air cylinder 41 to open the nozzle 4.
Open and close 0 from the inside. The valve piston 39 and the piston rod 42 are provided with air passages 39a and 4 through which air is fed through an external air hose 43.
2a is provided so that air can be injected from the center of the lower surface of the valve piston 39. The valve piston 39 is normally connected to the volume syringe 32 and the common line 3
Located slightly above the connection port with 1, common pipe 3
1 to the volumetric syringe 32. Further, a bag opening/closing mechanism 44 is attached to the support column 38, as shown in FIGS. 2 and 3. This bag opening/closing mechanism 44 has two arms 47 horizontally bored on both left and right sides of a slide table 46 that slides up and down along a rail 45 provided at the top of a support column 38. Of the two horizontally mounted front and rear shafts 48, a fan-shaped drive gear 49 is mounted on the rear shaft, and a driven gear 50 is threadedly engaged with the drive gear 49 on the front shaft.
are fixed respectively. Further, a pair of front and rear vacuum suction members 51 are installed so as to be horizontally movable back and forth with respect to the arm 47 by a link 52 fixed to the shaft 48 and a link 53 pivoted to the arm 47, respectively. A link 53 fixed to the shaft 48 of
The upper end of the bag is pin-connected to the piston rod of a bag opening/closing air cylinder 54 which is pivotally connected to the arm 47. As shown in FIGS. 5 and 6, each vacuum suction member 51 has suction pads 57 fixed to both left and right sides of a vacuum pipe 56 that is horizontally suspended between left and right brackets 55. hose 5
It is connected to a blower or vacuum pump via 8 to suck air. The front and rear vacuum suction members 51 each have a vacuum pipe 56 whose central portion 56a is curved outward into a substantially semicircular shape, and is opened and closed by the operation of the bag opening/closing air cylinder 54. Sliding table 4
6 is moved up and down by the operation of an air cylinder 59 for vertically moving the bag, which is pivotally connected to the column 38. In the bag opening/closing mechanism 44, before the transport can 2 is transferred onto the conveyor 23 of the lifter 22, both the vacuum suction members 51 are opened at the lower position, so the paper bag 1 carried in is attached to both the vacuum suction members 51. located in between. When it is detected that the transport can 2 has been transferred onto the lifter 22, the bag opening/closing air cylinder 54 automatically reciprocates once and the vacuum suction member 51 closes.
Open again. Therefore, the paper bag 1 is attracted by the front and rear suction pads 57, as shown in FIG. 5, and the opening is opened as the front and rear vacuum suction members 51 are opened. After that, the air cylinder 59 for vertically moving the bag and the cylinder 25 for vertically moving the conveyor move forward at the same time, so that the paper bag 1 has its mouth portion attached to both vacuum suction members 51.
The nozzle 4 of the volume injector 32 is raised together with the transport can 2 to a predetermined height while being opened by the
0 is inserted into the center of the open mouth of the paper bag 1. When the forward movement of the air cylinders 59 and 25 is completed, the paper opening/closing air cylinder 54 automatically moves forward to close both vacuum suction members 51, and the opening of the paper bag 1 is clamped by these vacuum suction members 51 and closed. do.
At this time, the nozzle 40 of the volume injector 32 is inserted into the paper bag 1.
Since the central portions 56a of both vacuum pipes 56 are curved outward from each other, the opening of the paper bag 1 is designed to cover the nozzle 40 from both front and rear sides as shown in FIG. is blocked. This state is maintained by stopping the bag opening/closing air cylinder 54. And in this state,
The asphalt emulsion in the front chamber 26a or the rear chamber 26b of the constant volume container 26 is pushed out by the operation of the hydraulic cylinder 28, and is poured into the paper bag 1 through the volume syringe 32.
injected into. When the extrusion in the front chamber 26a or the rear chamber 26b is completed, the air cylinder 41 is actuated to lower the valve piston 39, and the remaining asphalt latex in the volume syringe 32 is pushed out and injected into the paper bag 1. When the valve piston 39 reaches the lower limit position, air is injected from the air passage 39a, so that the remaining asphalt milky lotion attached to the lower surface of the valve piston 39 and the mouth of the nozzle 40 is also blown off and inside the paper bag 1. to go into. The capacity of the constant volume container 26 is equivalent to approximately 90% of the standard weight to be filled into the paper bag 1, and the paper bag 1 has a capacity corresponding to about 90% of the standard weight to be filled into the paper bag 1.
A large part, about 9/10, is filled in a short time by the constant volume filling machine 20 without weighing. Such fixed volume filling is performed simultaneously by a plurality of fixed volume filling machines 20, and when the filling is completed, the bag opening/closing air cylinder 54 moves back to open both vacuum suction members 51, and the resulting vacuum is released. The suction action is also stopped and the suction by the suction pad 57 is released, and then the conveyor 23 of the lifter 22 is lowered and the bag paper 1 is lowered together with the transport can 2, and the air cylinder 59 for vertically moving the bag is moved back. Therefore, both vacuum suction members 51 also descend while being opened and return to their original positions. As shown in FIG.
While being housed in the container, it is sent from the conveyor 23 of the lifter 22 to the weight filling machine 21 shown in FIG. 7 by another conveyor 60. A plurality of weight filling machines 21 (four machines in the figure) are also arranged in parallel in the conveyance direction of the paper bag 1. Each weight filling machine 21 has a weight injector 61 connected to an asphalt emulsion supply source installed vertically on a column (not shown), a weighing device 62 equipped with a known load cell installed below it, and a weighing device 62 equipped with a known load cell placed above it. A conveyor 63 is placed thereon. Weight syringe 6
4 is provided with an electromagnetic valve 64, and the conveyor 63 is provided with a stopper 65 for positioning the conveying cans 2. When the transport can 2 is transferred onto the conveyor 63 on the scale 62, the electromagnetic valve 64 automatically opens, and the asphalt emulsion from the weight syringe 61 is already filled with about 90% of the asphalt emulsion as described above, and the mouth part is filled. The liquid is poured into the open paper bag 1 while being weighed by a measuring device 62. When the weight of the asphalt emulsion in the paper bag 1 reaches a standard value, the electromagnetic valve 64 is closed by the output signal of the load cell of the measuring device 62. Such filling while measuring the weight is carried out at the same time in a plurality of weight filling machines 21, and when the filling is completed, the paper bag 1 is transferred to another conveyor 66 while being accommodated in the transport can 2. It is fed into a sewing machine (not shown) and the opening is sealed. Note that the paper bag 1 has both vacuum suction members 5 as described above.
1, a small amount of asphalt emulsion is injected into the paper bag 1 (during this time, the paper bag 1 is held and suspended by both vacuum suction members 51), and then the transport can 2 is raised by the lifter 22. It's okay. Then, the bottom of the paper bag 1 can be pushed up by the bottom of the transport can 2, and the asphalt emulsion can be spread all the way to the corners of the bottom of the paper bag 1.

【Effect of the invention】

As described above, the present invention has the following effects. High-temperature melting materials such as asphalt emulsion can be filled fully automatically and efficiently without manual intervention.
And it's safe too. The high-temperature melt is temporarily stored in a large-diameter cylindrical fixed-capacity container, extruded by an extrusion piston, and then injected into the bag through a volume injector, so pressure fluctuations tend to occur when supplying the high-temperature melt. It is possible to accurately fill a fixed volume at a predetermined flow rate without being affected. While the opening of the bag is sucked open by a set of vacuum suction members of the bag opening/closing mechanism, the bag opening/closing mechanism is raised by an air cylinder for vertically moving the bag and the bag is suspended, thereby opening the volume syringe. After inserting the nozzle into the mouth of the bag, close the mouth of the bag and inject the high-temperature melt. At the same time, the valve piston is lowered with an air cylinder to close the nozzle from the inside, and then from the air passage of the valve piston. By jetting air, the high-temperature melt remaining on the nozzle is blown away into the bag, so the bag can be filled neatly without staining the outer surface of the bag with high-temperature melt. The conveyor can is transferred onto the lifter's conveyor, and the conveyor is raised by an air cylinder. In order to lift the conveyor together with the conveyor separately from lifting the bag, a small amount of asphalt emulsion is injected into the bag, and then the conveyor is raised. It is possible to use a filling method in which the bottom of the bag is pushed up by the bottom of the bag.
The hot melt can reach the bottom corners of the bag. The lifter that moves the conveyor cans up and down below the volume injector has a structure in which the conveyor itself is moved up and down by an air cylinder, so the cans can be carried in and out efficiently.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic configuration diagram of a constant volume filling machine, FIG. 2 is a front view of the constant volume filling machine, FIG. 3 is a side view of the same, and FIG. FIG. 5 and FIG. 6 are perspective views of the bag opening/closing mechanism, FIG. 7 is a front view of the weight filling machine, and FIG. 8 shows the state in which paper bags are loaded into the transport can. A perspective view, Figure 9 is a side view of the inflator, and Figure 9 is a side view of the inflator.
Figure 0 is a front view of the same. 1...Paper bag, 2...Transportation can, 3...Conveyor,
20... constant volume filling machine, 22... lifter, 23...
... Conveyor, 24 ... Stopper, 25 ... Air cylinder for vertical movement of conveyor, 26 ... Constant volume container,
27...Extrusion piston, 32...Volume syringe, 3
8...Strut, 39...Valve piston, 39a...Air passage, 40...Nozzle, 41...Discharge air cylinder, 42...Piston rod, 42a...
...Air passage, 44...Bag opening/closing mechanism, 47...Arm, 51...Vacuum suction member, 54...Air cylinder for opening/closing the bag, 59...Air cylinder for vertically moving the bag.

Claims (1)

[Claims] 1. While the bag 1 is placed in the transport can 2 in an upright state,
In an automatic bagging device for high-temperature molten material that is transported to a filling position together with a transport can 2 and filled with high-temperature molten material, a large-diameter cylindrical constant volume container 26;
A volume injector 32 with a much smaller diameter than the constant volume container 26 is connected to the container via a conduit 31 and an electromagnetic valve 37, a lifter 22 that raises and lowers the transport can 2, and a bag that opens and closes the mouth of the bag 1. The constant volume container 26 has a large-diameter extrusion piston 27 slidably fitted therein in order to receive and extrude a certain amount of high-temperature melt from a high-temperature melt supply source. The syringe 32 is installed perpendicularly to the column 38, has a nozzle 40 at its lower end, and has a discharge air cylinder 41 attached to its upper end. A valve piston 39 that opens and closes is fitted so as to be vertically slidable, and air passages 39a and 42a for air injection are provided in the valve piston 39 and piston rod 42. , an air cylinder 25 for vertically moving the conveyor 23, a stopper 24 for stopping the conveyance can 2 transferred onto the conveyor 23 at a fixed position below the volume injector 32, and a bag opening/closing mechanism 44. A set of vacuum suction members 51 for suctioning the opening of the bag 1 in the transport can 2 on the lifter 22 from both sides is attached to the arm 47 which is attached to the support column 38 so as to be movable up and down so as to be movable in the vertical direction. At the same time, a bag opening/closing air cylinder 54 for advancing and retracting these vacuum suction members 51 is attached to the arm 47, and the vacuum suction member 51 suctions the mouth of the bag 1 and raises the bag 1 while keeping it open. An automatic bagging device for high-temperature molten material, comprising: an air cylinder 59 for moving the bag up and down to move the arm 47 up and down in order to insert the nozzle 40 into the bag.