JPH04102504A - Automatic bag packing method for molten substance and device therefor - Google Patents

Abstract

PURPOSE:To reduce the equipment cost and shorten the working processes by a method wherein a bag in a carrying can is drawn by a vacuum suction pad, and the mouth part is opened, and a nozzle of a injector is inserted in the mouth part, a molten substance is injected, and the molten substance is extended to corners by lifting the bottom of the bag, and after filling has been performed by a large filling machine, the filling is continued by a small filling machine. CONSTITUTION:A carrying can 4 is sent to a large filling machine 5 by a conveyor 2, and a paper bag 3 is drawn by a vacuum suction pad 56, and the mouth part of the paper bag 3 is opened by retracting the vacuum suction pad 56, and a nozzle 28 of an injector 11 is inserted in the mouth part. The mouth part of the paper bag 3 is gripped by closing clamp members 80, 81, asphalt emulsion is injected in the paper bag 3 through the injector 11 from a fixed volume apparatus 8. By raising a lifter 62, the bottom of the paper bag 3 is pushed up by the bottom of the carrying can 4, and thus, the asphalt emulsion is extended to corners of the bottom of the paper bag 3. When the large quantity filling is completed, the carrying can 4 is carried to a small filler machine 6 side. By a weight measuring device, the weight of the asphalt emulsion in the paper bag 3 is measured, and if the weight is, e.g. at least 85% or more, the asphalt emulsion in a receiver 52 is injected in the paper bag 3 through an injector 55 at small flow rate.

Description

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

TECHNICAL FIELD The present invention relates to an automatic bagging method and apparatus for automatically filling a bag with a fixed amount of molten material such as asphalt emulsion.

[Conventional technology]

The present applicant has published Japanese Patent Application Laid-Open No. 6278002 as this type of device.
We have already provided what is described in the publication. In this conventional device, a paper bag is placed in a transport can with the bag closed and transported to the second air injection flake, which injects air into the paper bag to forcibly inflate it, and then the paper bag is placed at the bottom of the syringe. At this position, the paper bag is suctioned from both sides with a set of vacuum suction pads to open the mouth, and while the paper bag is in this suction state, the paper bag is raised all at once to a predetermined height by the vacuum suction pads, and the paper bag is placed at the mouth of the paper bag. At the same time as the nozzle of the syringe is inserted, the transport can is also raised all at once to a predetermined height. 6. Next, the vacuum suction pads on both sides are advanced to close the mouth of the paper bag, and while maintaining this state, insert the syringe into the paper bag. Fill with melt from. After a predetermined amount of filling is performed, the suction by the vacuum suction pads on both sides is released, these vacuum suction pads are moved back, and then the transport can is lowered to a height at which it is to be carried out. In addition, in this conventional device, a constant volume container that determines the amount of filling into a paper bag is installed with its axis horizontal, and a piston fitted into the container so as to be able to slide back and forth is connected to the piston rod of the extrusion hydraulic cylinder. By moving the piston of the fixed volume container back and forth with this hydraulic cylinder, the melt is pushed out of the fixed volume container on one side of the fixed volume container, and at the same time, the melt is pushed into the fixed volume container on the other side. flows into.

[Problem to be solved by the invention]

Conventionally, when filling a paper bag with melted material as described above, an air injection second flake was used to spread the melted material to the bottom corners of the paper bag, and this forced the paper bag before filling. It was inflated. A first object of the present invention is that it is possible to spread the melt to the bottom corner of the bag without having to inflate the bag before filling it by means of an air injection flake. It is an object of the present invention to provide an automatic bagging method for molten material, which can omit a mechanical inflator, reduce installation OI costs, and shorten the working process. In addition, in the conventional device, the constant volume container is a horizontal type with a piston that slides back and forth, and the melt is pushed out on one side of the front and back, while the melt flows in on the other side, and the extrusion and inflow of the melt are controlled. Since the structure was such that the pumping was performed alternately back and forth, at least four electromagnetic valves and a complicated control circuit were required to switch between extrusion and inflow. In addition, a large thrust force was required to operate the piston of the constant volume container and push out the melt. A second object of the present invention is to provide an automatic bag for the melt that allows the melt to flow into a constant volume container and extrude the melt from the container more easily than before, and that allows the melt to be extruded quickly with a small thrust. Our goal is to provide stuffing equipment.

[Means to solve the problem]

In the automatic bag filling method of the present invention, bags are filled with melted material using the following procedure. ■ A process in which the transport can is set at the first height, vacuum suction pads are advanced against the bag from both sides to suction the bag, and then these vacuum suction pads are moved back to open the mouth of the bag.■ With the vacuum suction pad A process of raising the vacuum suction pad while suctioning the bag and inserting the nozzle of the syringe into the opening of the opened bag ■ A process of clamping the opening of the bag with a clamp member ■ Raising the transport can from the first height The process of raising the can to the second height ■ The process of injecting the melt into the bag from the syringe while holding the opening of the bag with the clamp member ■ The process of raising the transport can from the second height to the third height while performing the injection.
The process of raising the can to a height of 1. After filling the bag with a predetermined amount of melted material, the process of releasing the grip by the clamp member. The process of lowering the transport can from the third height to the height at which it is to be carried out. , a syringe with a nozzle at the lower end and a built-in valve piston for opening and closing the nozzle, and a piston fitted into a vertical cylinder connected to a melt supply source via piping so that the piston can slide up and down within a predetermined stroke range. a constant volume container that can accommodate a predetermined amount of the melt by pushing up the piston with the pressure of the melt fed from a melt supply source; An extrusion actuator presses down to push the melt from the constant volume container to the syringe, and an extrusion actuator moves forward and backward on both sides of the bag to open and close it by adsorbing the opening of the bag inside the transport can that is transported below the syringe. In order to insert the nozzle at the lower end of the syringe into the opening of the bag that is sucked by a set of vacuum suction pads, these vacuum suction pads are raised, and after the suction is released, the vacuum is applied. A vacuum suction pad vertical movement mechanism that lowers the bite pad; a clamp device that clamps the opening of the bag after the nozzle is inserted and releases the clamping after filling a fixed volume of melt; After inserting the nozzle, the transport can is raised from the first height to a second height, and during the injection of the melt by the injector, the transport can is raised from the second height to the third height. and a lifter that raises the clamp device and lowers it from the third height to the first height after releasing the clamping device. This bag filling device is equipped with a small bag filling device that, after the above-mentioned large filling, that is, after filling a fixed volume of melt, injects the melt into the bag little by little until a predetermined Mfl is reached while measuring the weight of the filling including the transport can. A filling machine can be provided. The small filling machine is
a small filling syringe having a nozzle at the lower end and a built-in valve piston for opening and closing the nozzle, and a piston fitted in a vertical cylinder connected to the melt supply source by piping so as to be slidable up and down, A receiver capable of containing the melt by pushing up the piston with the pressure of the melt pumped from the melt supply source, and a receiver mounted on the receiver and pushing down the piston to push the melt from the receiver for the small filling. and an actuator for pressurizing the syringe.

[For production]

In the bag filling method according to the present invention, the bag is placed in a transport can and transported to the bottom of the syringe, and the bag is suctioned from both sides by the - set of vacuum suction pads to open the mouth, and is also suctioned to the vacuum suction pads. The nozzle of the syringe is inserted into the open mouth. Further, the transport can is raised from the first height (lower position) to the second height (interruption position), and supports the lower end of the bag lifted by the vacuum suction pad from below. After this, the bag is clamped at the mouth by a clamping device. When the melt is injected from the syringe in this state, the weight of the melt is applied to the bag, but since the mouth of the bag is held by the clamp device, the melt is suspended in the clamp device. It receives an injection and expands as the amount of injection increases. When a certain amount has been poured and the transport can is raised from the second height to the third height (upper position), the bottom of the bag into which the melt is being poured is lifted by the transport can, causing the bottom to expand and The molten material spreads to every corner. Subsequent injections are carried out with the weight supported from below by the transport can, and when the predetermined amount is filled, the clamping device is released.
The transport can is lowered from the third height (upper stage position) to the height at which it is to be transported. In the bagging device according to the present invention, the melt fed under pressure from the melt supply source does not push up the piston of the constant volume container due to its pressure, and therefore automatically flows into the constant volume container in a predetermined amount. When this piston is pushed down by the extrusion actuator, a predetermined amount of melt in the volumetric container is expelled into the syringe and filled into the bag as described above. When introducing the melt into the constant volume container, the nozzle of the syringe is closed with a valve piston in the syringe and a solenoid valve, for example, arranged between the constant volume container and the melt supply source is opened. Also, when pushing out the melt in the constant volume container and injecting it from the syringe into the bag, close the above NWa valve,
Just open the nozzle. After most of the filling is done by a large filling machine, if the remaining small amount is to be filled by a small filling machine at a small flow rate, the melt can be stored in a receiver and pushed out from the receiver to the injector. A small flow rate can be filled at a constant pressure without being affected by drops or fluctuations in supply pressure.

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 3 show an overview of an automatic bag filling device 1 according to the present invention for filling paper bags with asphalt emulsion. This automatic bagging device'! A conveyor 2 is installed to cross the + from right to left in FIG. transported to paper bag 3
After being filled with Hairsfeld emulsion, it is conveyed to the right by the same conveyor 2. The automatic bagging device l is used to pack each paper bag 3
It has a large filling machine f15 and a small filling machine 6 in order to fill the asphalt emulsion into the inside of the machine in two large and small quantities. These large and small filling machines 5 and 6 are installed side by side in the transport direction of the conveyor 2, and most of them are filled with a constant volume at a large flow rate by the large filling IR5, and the rest are filled by the small filling machine 6 while measuring the weight.
Filling is performed at a small flow rate until the final weight reaches a constant weight (for example, 40 kg). The large filling 41g5 is stored in a constant volume container 8, which is a cylindrical container vertically installed on a pedestal 7, as shown in FIGS. 1 and 2.
The constant volume W1 vessel 8 includes an extrusion hydraulic nolinder 9 vertically mounted on the constant volume N vessel 8, and a large filling syringe 11 vertically installed on the column 10. It is connected to an asphalt latex supply source (not shown) via a connected elbow 12, a solenoid valve 13, and a supply pipeline 14, and is also connected to an elbow 15 connected to the lower surface and horizontally attached to a support column 0. It is connected to the syringe 11 via a connecting pipe 16. Figure 4 shows the constant volume! The internal structure of the vessel 8 is shown. The constant volume container 8 has a double cylindrical structure including an inner cylinder 17 and an outer cylinder 18, and a steam insulating chamber 19 is formed between these two cylinders I7 and 18. High-temperature steam is circulated and introduced into the stem air insulating greenhouse 19 in order to keep the asphalt emulsion contained in the inner cylinder F warm. A free piston 20 is fitted in the inner cylinder 17 so as to be slidable up and down. A stroke adjustment rod 21 is vertically fixed to the center of the lower surface of the free piston 20 to determine its upward stroke. . The stroke adjustment rod 21 passes downward through the bottom cover 22 of the constant volume container 8, and by adjusting the upper limit height of the stroke adjustment rod 21 below the outside of the inner cylinder 17, the free piston 20 It is possible to adjust the upward stroke of the The heated and melted asphalt latex from the asphalt latex supply source is pumped through the supply pipeline 14 at a constant pressure, so the N
When the m-valve 13 is opened, the asphalt milk flows into the inner cylinder 17 from below while pushing up the free piston 20. Since the free piston 20 can only rise by the stroke determined by the stroke adjustment rod 21 as described above, only the stationary asphalt emulsion corresponding to the upward stroke of the free piston 20 can enter the inner cylinder 17. The piston rod 23 of the extrusion hydraulic cylinder 9 penetrates the upper lid 24 of the constant volume container 8 and protrudes into the inner cylinder 17, and when the piston rod 23 is propelled downward, the free piston 20 is pushed down. Therefore, after a certain amount of asphalt emulsion has entered the inner cylinder 17 as described above, when the magnetic valve 13 is closed and the free piston 20 is pushed down to the stroke end by the piston rod 23, the inner cylinder 1
A fixed amount of asphalt emulsion in 7 is forced out from elbow 15 into syringe 11. Note that a pneumatic cylinder may be used instead of the hydraulic cylinder 9. The structure of the injector 11 is shown in FIG. 5. The injector 11 also has a double cylindrical structure consisting of an inner cylinder 25 and an outer cylinder 26, and a steam insulating chamber 27 is formed between these two cylinders 25 and 26. High-temperature steam is also circulated and fed into the steam storage room 27. A nozzle 28 is removably fixed to the lower end of the inner cylinder 25 by a threaded portion 29 thereof. The nozzle 28 is connected to the inner cylinder 2
An upper part 28a having an inner diameter equal to 5, a lower part 28b smaller in both inner and outer diameter than this, and a lower part 28b from the lower part 28a.
It has an intermediate portion 28c whose diameter gradually decreases toward the center. A valve piston 31 fixed to the lower end of a valve rod 30 is provided in the inner cylinder 25 so as to open and close the nozzle 28 from inside. A valve piston 3 is provided on the upper cover 32 common to the inner cylinder 25 and outer cylinder 2G.
An opening/closing pneumatic cylinder 33 for opening and closing the nozzle 28 by moving the nozzle 1 up and down is installed. The valve stem 30 is integrally connected to a piston rod 34 of a pneumatic cylinder 33. The valve stem 30 is a sleeve 3 provided on the top cover 32.
5 in a fluid-tight manner so as to be able to slide vertically. FIG. 6 shows an enlarged view of the valve piston 31, the nozzle 28, and the surrounding area thereof. In the packing groove 36 of the valve piston 31, a plurality of ■-shaped packings 37 for sealing between the inner peripheral surface of the lower part 28b and the inner circumferential surface of the lower part 28b are stacked one on top of the other. It is fixed to . This valve piston 31
A conical recess 40 is provided on the lower surface of the valve piston 31, leaving only its circular periphery 39, and the lower end of the valve piston 31 is shaped like a sharp ring-shaped blade. An air injection head 41 with a portion protruding is screwed into the deepest part of the center of the four parts 40. The valve stem 30 is provided with an air passage 42 that extends long along its axis and exits to the air injection head 41 . Compressed air is fed into the air passage 42 from outside the inner cylinder 25. Furthermore, the air injection head 41 branches radially from the air passage 42 and injects air along the conical surface of the recess 40 . One number of injection holes 43 are provided. Furthermore, a guide wheel 44 is attached to the valve stem 30 slightly above the valve piston 31, and between the guide wheel 44 and the valve piston 31, an auxiliary valve 45 and an insert 46 are vertically slidable. It is attached to the valve stem 30. As shown in FIG. 6, the guide wheel 44 has a boss 47 that fits onto the valve stem 30, a rim 48, and a plurality of arms 49 that connect these. It slides along the inner peripheral surface of the cylinder 25. The valve stem 30 is provided with a stepped portion 50 that engages with the boss 47 . A coil spring 51 is provided between the insert 46 and the boss 47 of the guide wheel 44, and the auxiliary valve 45 is urged downward by the spring 51 via the insert 46. The auxiliary valve 45 has a truncated conical insert 4 that tightly engages with a part of the truncated conical inner peripheral surface of the intermediate portion 28c of the nozzle 28.
6 has a truncated conical shape that is oriented upside down compared to the auxiliary valve 45. The asphalt emulsion extruded from the constant volume container 8 as described above flows into the inner tube 25 of the syringe 11 through the connecting vibrator 16. When asphalt latex is injected into the paper bag 3 from the syringe 11, the valve piston 31 is pulled up to the position indicated by the chain line in FIG. 6 by the opening/closing pneumatic cylinder 33, and the nozzle 28 is opened. At this time, the auxiliary valve 45 is also lifted together with the valve piston 31, and the nozzle 28
move away from A fixed amount of asphalt emulsion extruded from the constant volume container 8 flows out vertically from the nozzle 28 under a constant pressure and is injected into the paper bag 3. To stop the injection, the valve piston 31 is pushed down by the opening/closing pneumatic cylinder 33 so that it fits into the lower part 28b of the nozzle 28 as shown by the solid line in the figure, and the lower part 28b of the nozzle 28 is inserted.
The nozzle 28 is closed from the inside while scraping off the asphalt emulsion adhering to the inner surface with the valve piston 31. At this time, the auxiliary valve 45 engages with the truncated conical inner circumferential surface of the intermediate portion 28c of the nozzle 28 and is pressed against the inner circumferential surface by the coil spring 51, so that the nozzle 28
1 and the auxiliary valve 45. After that, when compressed air is introduced from the outside into the air passage 42 of the valve stem 30, the air is injected from the injection hole 43 of the air injection head 41 along the conical surface of the recess 40, so that the nozzle 28 and the valve piston 31 The asphalt emulsion remaining on the paper bag 3 is blown away and injected into the paper bag 3. When the nozzle 28 is closed as described above and the piston rod 23 of the extrusion hydraulic cylinder 9 is raised, asphalt latex from the asphalt latex supply source flows into the constant volume container 8 while pushing up the free piston 20 as described above. Therefore, quantitative filling can be repeated. The small filling machine 6 is smaller than the large filling IR5 and has a slightly different function, but is substantially the same in structure. That is, the small filling machine 6 includes a receiver 52 which has a smaller capacity than the constant volume container 8 but has the same internal structure, and a free piston in the receiver 52 that is pushed downward to fill the receiver 52.
Pressurizing hydraulic cylinder 5 that pressurizes the asphalt emulsion inside
3 and a small filling syringe 55 having the same structure except for the nozzle 54 being smaller than the syringe 11 of the large filling machine 5, the amount of asphalt emulsion to be injected is controlled according to the weight. In order to determine the capacity, it is not necessary to use the receiver 52 to determine the capacity to be constant. Although the receiver 52 is not necessarily required, having it has the following advantages. In other words, if the supply pressure of the asphalt emulsion source is too low or fluctuates greatly, the asphalt emulsion will flow out from the small filling syringe 55 at a small flow rate over a long period of time, which will lengthen the time required for filling to a constant weight. , or the small filling syringe 55 may not drain properly, and the liquid may drip onto the outer surface of the paper bag 3 that is sent to the small filling machine 6 after being filled by the large filling machine 5, staining it. There is a problem. However, inside the receiver 52,
As with the constant volume container 8, the asphalt milky lotion is allowed to flow in while pushing up the free piston with its supply pressure, and when the free piston is pushed down by the pressurizing hydraulic flip 53 when injecting with the small filling syringe 55, the asphalt milky liquid is can be pushed out to the small filling syringe 55 side with a constant pressure, so the above-mentioned problems can be solved. As shown in FIG. 2, below the injection K11l of the large filling machine 5, the opening of the paper bag 3 in the transport can 4 is sucked from both sides to open it, and the paper bag 3 is lifted in this state. A set of vacuum suction pads 56 are installed as follows. That is, a horizontal elevating platform plate 58 is attached to a guide rod 57 vertically installed in the branch office 10 so as to be movable up and down. This elevating platform plate 58 is moved up and down by a pneumatic cylinder 59 for moving the pad up and down. A set of pneumatic cylinders 60 for moving the pads back and forth are mounted on the lifting table 58 so as to face each other, and -All vacuum suction pads 56 are fixed to the ends of the piston rods of the pneumatic cylinders 60 for moving the pads back and forth, respectively. . As shown in FIG. 7, the lifting platform plate 58 has a structure having a size sufficient to allow the paper bag 3 to be inserted between the mounting positions of a pair of pneumatic cylinders 60 for moving the pads back and forth, with its mouth open. An opening 61 is provided. The - set of vacuum suction pads 56 are connected to a vacuum device via an air hose (not shown). When the transport can 4 is stopped directly below the injector 11 of the large filling machine 5 as described below, the pneumatic cylinders 60 for moving the pads back and forth in the - group simultaneously reciprocate, and the vacuum suction pads 56 in the pair are moved forward relative to each other. After that, the paper bag 3 is immediately retracted, and the opening of the paper bag 3 is pulled open by suctioning the central part of the outer surface from both sides by a set of vacuum suction pads 56, as shown in FIG. Thereafter, the elevating platform plate 58 is raised to a predetermined height along the guide rod 57 by the pneumatic cylinder 59 for vertically moving the pad, so that the paper bag 3 remains attracted by the -U vacuum suction pad 56 and is opened. Injector 1 into the mouth
．． It is raised to a predetermined height at which one nozzle 28 is inserted. After the paper bag 3 is opened and raised as shown in 2, in order to raise the transport can 4, the transport can 4 is placed below the vacuum suction pad 56 as shown in FIGS. 2 and 8, and then raised and lowered. Phthalo 2 is installed as shown below. A vertical lifting plate 65 is connected to the piston rod 64 of the pneumatic cylinder 63 for lifting and lowering the lifter. This elevating plate 65 is located behind the conveyor 2, and upper and lower rollers 67 that move along a pair of vertical guide rails 66 are pivotally supported on both left and right sides of the elevating plate 65. It is vertically raised and lowered along a guide rail 66 by a pneumatic cylinder 63. At the lower end of the lifting plate 65, a pair of left and right arms 68 are provided horizontally protruding forward at a distance that allows the transport can 4 to be placed thereon while supporting both left and right ends of the bottom. Each arm 68 is located in a gap between the roller groups 2a constituting the conveyor 2, and can vertically pass through the gaps between the roller groups 2a as the elevating plate 65 moves up and down. On the left and right arms 68, there are conveyor cans 4.
Left and right stopper plates 69 and 70 are fixed vertically in order to restrict the left and right movement of the vehicle when it is placed on the vehicle. The stopper plate 69 on the left side normally protrudes slightly above the height of the roller group 2a of the conveyor 2, as shown in FIG. 4 collides with this stopper arm 69 and lands on both arms 68! ! It is stopped at a fixed position where it can be placed. Note that the stoppage is detected by a sensor (not shown). Further, a front guide is provided between the tips of these arms 68 in order to restrict the back and forth movement of the transport can 4 placed on both arms 68 and to guide the transport from right to left on the conveyor 2. A rear guide rod 72 is installed horizontally in front of the rod 71 and the elevating plate 65, respectively. The height of the left and right arms 68 on which the transport can 4 is placed can be changed in four stages by controlling the operation of the pneumatic cylinder 63. The first is a stopper plate 69 on the left side, which is slightly lower than the roller group 2a of the conveyor 2, as shown in FIG.
This is the height at which the transport can 4 can be stopped at a fixed position by
is higher than the first height, and after the paper bag 3 is attracted by the vacuum suction pad 56 and raised to a predetermined height as described above, the transport can 3 is lifted and the lower end of the paper bag 3 is gently touched from below with the bottom of the transport can 3. The third height, which is the height that can be supported (middle position), is slightly higher than the second height, and the lower end of the paper bag 3 can be slightly pushed up by lifting the transport can 4 during injection by injection ill. The fourth height (upper stage position) is lower than the first height, and after the stationary filling of the asphalt emulsion as described above, the transport can 3 is returned to the conveyor 2.
The height at which the left stopper arm 69 can be placed on top and transported to the left by the conveyor 2, that is, the height at which the left stopper arm 69 is slightly lower than the roller group 2a of the conveyor 2 (lower limit position)
It is. Further, above the vacuum suction pad 56, a frame 73 installed horizontally in front of the support column 10 is clamped in order to hold the opening of the paper bag 3 which has been suctioned and lifted by the vacuum suction pad 56 at a predetermined height. A device 74 is attached. 9th
This clamping device 74 is specifically shown in FIG. 1 and FIG. 1O. A pair of front and rear shafts 75 are supported in parallel on a frame 73. Sector gears 76 that mesh with each other are fixed to these shafts 75, and the front shaft 75
is connected to the piston door 8 of the clamp pneumatic cylinder 77 via a crank 79, and both shafts 75 are simultaneously rotated by this pneumatic cylinder 77 in mutually opposite directions. On both left and right sides of the frame 73, a front-rear set of clamp members 80 on the left side and a front-rear set of clamp members 81 on the right side are connected to one link 82 and a shaft, respectively, which are pivotally connected to the frame 73. It is mounted so that it can move in parallel with two arms 83 fixed to 75. Therefore, when both fan-shaped gears 76 are rotated in the direction of the arrow in FIG. The clamp members 81 approach each other, and these two sets of clamp members clamp the opening of the paper bag 3 into which the nozzle 28 of the syringe 11 is inserted, on both sides of the nozzle 28 as described above. Syringe 1
The injection as described above by No. 1 is performed in this state. On the other hand, below the syringe 55 for small filling I16, there is a transport can 4.
A weighing device 84, which is the same as the conventional weighing device 84, is installed to lift the asphalt emulsion and measure the filled weight of the asphalt emulsion. The structure of this automatic bag filling device is as described above, and the flow of its operation will now be explained with reference to the operation explanatory diagrams of FIGS. 11 to 18 and the flowchart of FIG. 19. In order to send the conveyor cans 4 one by one to the large filling machine 5 by the conveyor 2, the conveyor cans 4 are temporarily stopped by a carry-in stopper 85 as shown in FIG. 11 at a position just before entering the large filling machine 115. In large filling 4!15, after detecting in step 101 in FIG. 19 that the transport can 4 is not directly below the syringe 11 of the large filling machine 5 using a transport can sensor (not shown),
In step 102, the lifter 62 is placed at a lower position, that is, at a height that allows the left stopper plate 69 to stop the transport can 4. After that, in step 103, the carry-in stopper 85 is retracted, and the carry-in can 4, which has been stopped by the stopper 85 and waiting, is transported to the fixed position where it is stopped by the stopper plate 69, and in step 104, the carry-in can 4 is moved into the transport can 4. A bag sensor (not shown) detects whether or not there is a paper bag 3 in the bag. If there is a paper bag 3, a set of vacuum suction pads 56 are lowered from the upper position to the lower position where the paper bag 3 can be sucked in step 105. Next, in step 106, both vacuum suction pads 56 are advanced toward each other, and at the same time, in step 107, the vacuum suction of the vacuum suction pads 56 is turned on to suction the paper bag 3, and in step 1.08, the suction is properly performed. A vacuum sensor (not shown) detects whether or not the If it is suctioned, the vacuum suction pad 5 is removed in step 109.
6 to open the 11th part of the paper bag 3 as shown in FIG.
The nozzle 28 of the syringe 11 is inserted into the opened mouth of the syringe. After this, in step 111, the clamp member 8 of 2&Il is
0.81 is closed and the opening of the paper bag 3 is clamped from both sides as shown in FIG. 14, and in step 112, a clamp sensor (not shown) detects whether or not the clamping has been properly performed. If the bag is properly clamped, the process proceeds to step 113, where the lifter 62 is raised from the lower position to the middle position and the lower end of the paper bag 3 is lightly supported from below by the bottom of the transport can 4 as shown in FIG. , in step 114, vacuum first pad 5
Turn off the vacuum suction 6 and release the suction of the paper bag 3. Next, the process proceeds to step 1.15, and large-scale filling is started in which the asphalt milky lotion from the fixed volume I container 8 is injected into the paper bag 3 through the syringe 11 in a large amount. At this time, the paper bag 3
As shown in the figure, the paper bag 3 receives the weight of the asphalt emulsion while being suspended from the clamp member 80 of 21J, so that the bottom of the paper bag 3 is expanded by the weight of the asphalt emulsion. At this stage, the paper bag 3 is pushed and expanded only by the weight of the asphalt emulsion, so the bottom of the paper bag 3 cannot be sufficiently expanded, and it is expected that the asphalt emulsion will not reach all the corners of the bottom of the paper bag 3. Therefore, when the injection amount reaches the final filling amount, for example, about 30 parts, step 116
As shown in FIG. 16, the lifter 62 is raised from the middle position to the upper position, and the bottom of the paper bag 3 containing the asphalt latex is slightly pushed up by the bottom of the transport can 4. As a result, the asphalt latex is pushed up to the bottom of the paper bag 3. reach every corner,
Further, the weight of the asphalt emulsion is supported by the transport can 4. Specifically, this operation is performed when the time from the start of injection reaches a predetermined time or more, or when the injection flow rate is measured with a flowmeter and the flow rate exceeds a predetermined value, the lifter is activated. This is done by operating the pneumatic cylinder 63 to raise the cylinder 62 from the middle position to the upper position. When the entire amount of asphalt emulsion in the constant volume container 8 is pushed out and the nozzle 28 is closed by the valve piston 31 in the injector 11 to complete the fixed amount filling (large filling), air is discharged from the air injection head 41 in step 117. After spraying and blowing the asphalt milk into the paper bag 3 as described above, in step 118, the clamp members 80 and 81 are opened as shown in FIG. 17 to release the paper bag 3 from being held. Also,
On the small filling machine 6 side, in order to carry out the conveyor can 3 that has been filled by the conveyor 2 by the conveyor 2, it is checked in step 11 whether or not the carry-out stopper 86 shown in FIG. 18 is retracted.
If it is determined in step 9 and has been evacuated, lifter 6 is moved in step 120.
2 is lowered to the lower limit position, and the transport can 4 that has been filled by the large filling machine 5 is placed on the conveyor 2 again as shown in FIG. 17 and is transported to the small filling machine 6 side. And large filling 81
On the 5 side, the process returns from step 120 to step 101 and repeats the same operation. On the other hand, in the small filling machine 6, a sensor detects whether or not the preceding transport can 4 has already been carried out from directly below the small filling syringe 55 in step 121, and if it has been carried out, the carrying out is stopped in step 122. Step 6: Move the stopper 86 from the retracted position to the stop position, and stop the large-filled transport can 4 directly below the small-fill syringe 55.6 Next, step 1
At step 23, the sensor detects whether there is a transport can 4 directly below the syringe 55, and if there is, at step 124, the weighing device 8
4 and measure the weight of the asphalt emulsion in the paper bag 3, and if the weight exceeds a certain level (for example, 85% of the final filling weight)
It is determined in step 125 whether the weight is %. If the weight is above a certain level, the process proceeds to step 126, where small filling is started in which the asphalt milky lotion in the receiver 52 is injected into the paper bag 3 at a small flow rate through the syringe 55, and at the same time, the stopper 86 for stopping the delivery is retracted in step 127. . Next, in step 128, it is determined whether the final filling weight has been reached based on the output of the weighing device 84, and if so, step 1
At step 29, remove the residual asphalt emulsion by air injection into a paper bag 3.
After blowing into the inside, in step 130, the weighing device 8
4 is lowered, the conveyor can 4 is placed on the conveyor 2 again and carried out to the left, and then the process returns to step +21 and the same operation is repeated. [Effects of the Invention] As detailed above, according to the automatic bag filling method of the present invention, the melt can be spread to the bottom corner of the bag without inflating the bag before filling with the air injection type inflation. Therefore, the air injection type inflation can be omitted, equipment costs can be reduced, and the work process can be shortened. Further, according to the automatic bagging device of the present invention, it is possible to flow the melt into the constant volume container and extrude the melt from there more easily than before, and extrude the melt quickly with a small thrust. After most of the filling is done by a large filling machine, when filling the remaining small amount with a small filling machine at a small flow rate, the melt from the melt supply source is temporarily stored in a receiver and then pushed from the receiver to the small filling syringe. By doing so, it is possible to perform filling at a small flow rate at a constant pressure without being affected by drops or fluctuations in the supply pressure of the melt supply source, which increases the time required for filling until a constant weight is reached.
Problems such as affecting other operations, or the liquid not draining properly in the small-filling syringe, dripping onto the outside of the bag sent to the small-filling machine after it has been filled by the large-filling machine, contaminating it. It can be resolved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an entire example of an automatic bagging device according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view of the same, and FIG. Figure 5 is a sectional view of the syringe of the large filling machine, Figure 6 is an enlarged sectional view of the lower end of the syringe, and Figure 7 is a state in which a paper bag is sucked with a vacuum suction pad and its mouth is opened. FIG. 8 is a partially cutaway front view of the beam lid; FIG. 9 is a side view of a clamping device for clamping the opening of a paper bag; FIG. 10 is a partially cutaway plan view of the clamping device; Figures 18 to 18 are operation explanatory diagrams showing the operation of the large filling machine from the state before filling to filling and sending to the small filling machine side according to the work order, and Fig. 19 is the operation of the large filling machine and small filling machine. It is a flow chart explaining. ■...Automatic bag filling device, 2...Conveyor, 2a...Roller group, 3...Paper bag,
4...Transportation can, 5...Large filling machine, 6.
...Small filling machine, 7... Frame, 8...
... Constant volume container, 9 ... Hydraulic cylinder for extrusion, 1
0... Strut, 11... Injector for large filling, 12... Elbow, 13... Solenoid valve, 14... For supply Pipeline, 15...
...Elbow, 16...Connection pipe, 17...
...Inner cylinder, IB...Outer cylinder, 19...Steam storage room, 20...
... Free piston, 21 ... Stroke adjustment rod, 22 ... Bottom cover, 23 ... Piston rod, 24 ... Top cover, 25 ...・・・
Inner cylinder, 26...Outer cylinder, 27...Steam storage chamber, 28...Nozzle, 28a, 28b, 28c...Upper side of nozzle, bottom Side part, middle part, 29... Threaded part, 30.
... Valve stem, 31 ... Valve piston, 32.
...Top lid, 33...Pneumatic cylinder for opening/closing, 34...Piston rod, 35...
・Sleeve, 36... Packing groove, 37...
...Packskin, 38...Press plate, 39...
... Periphery of valve piston, 40 ... Recessed part of valve piston, 41 ... Air injection head, 42 ...
... Air passage, 43 ... Injection hole, 44.
...Guide wheel, 45...Auxiliary valve,
46...intervention, 47...boss, 48
...Rim, 49...Arm, 50...
...Stepped portion, 51...Coil spring, 5
2... Receiver, 53... Hydraulic cylinder for pressurization, 54... Nozzle, 55...
Syringe for small filling, 56... Vacuum suction pad, 5
7...Guide rod, 58...Elevating table plate, 59...Pneumatic cylinder for vertical movement of pad,
60...Pneumatic cylinder for moving the pad back and forth, 61
...Opening, 62...Lifter, 63.
...Pneumatic cylinder for lifting lifter, 64...
... Piston rod, 65 ... Lifting plate, 66.
...Guide rail, 67 ...Roller, 6
8...Am, 69.70...Stomper plate, 71.72...Guide rod, 73
...Frame, 74...Clamp device,
75...Shaft, 76...Sector gear 77...Pneumatic cylinder for clamp, 78...
...Piston rod, 79...Crank, 80.81 ...Clamp member, 82...
...Link, 83...Arm, 84...
... Weight capacity device, 85 ... Stopper for stopping carrying in, 86 ... Stopper for stopping carrying out. FIG, 3 FIG, 1 FIG, 2 70 t)-:) bJ FIG, 8 FIG, 10 Procedural amendment September 3, 1990 Commissioner of the Japan Patent Office Satoshi Uematsu 1, Indication of case Patent application Hei 2-204980 No. 2, Name of the invention Automatic bagging method and device for molten material 3. Relationship with the amended case Patent applicant 1) Sokichi Naka 4, Agent ■ 18-11 Shinbashi-chome, Minato-ku, Tokyo -Matsubiru (1) "Left side" on page 13, line 10 of the specification is corrected as "right side," and "right side" on line 13 of the same page is corrected as "left side." (2) In the same book, page 20, lines 12 to 13, ``skived'' is replaced with ``
``Dropped'' and ``kept'' in line 6 of page 33 as ``Dropped''.
"I dropped it," they each corrected. (3) "Large weight" on page 30, line 7 of the same book is corrected to "large i1." 7° correction details

Claims (1)

[Scope of Claims] 1. In an automatic bagging method for molten material, in which a bag is placed in a transport can, the bag is transported to below a syringe at a predetermined position, and the bag is filled with the melt through the syringe, the transport can a step in which vacuum suction pads are moved forward toward the bag from both sides to a first height to suction the bag, and then these vacuum suction pads are retreated to open the mouth of the bag; A process of raising the vacuum suction pad while suctioning the bag and inserting the nozzle of the syringe into the mouth of the opened bag, a process of clamping the mouth of the bag with a clamp member, and a process of placing the transport can in the first position. a step of injecting the melt into the bag from the syringe while the mouth of the bag is held between the clamp members, and a step of raising the conveying can from the height of 3rd higher than the height of
After filling the bag with a predetermined amount of molten material, the bag is released from the clamping member, and the transport can is lowered from the third height to a height at which it is unloaded. Features an automatic bagging method for molten materials. 2. A syringe with a nozzle at the lower end and a built-in valve piston for opening and closing the nozzle, and a vertical cylinder connected to a melt supply source with piping, in which the piston can be slid up and down within a predetermined stroke range. a constant volume container that can accommodate a predetermined amount of the melt by pushing up the piston with the pressure of the melt fed from the melt supply source; An extrusion actuator presses down to push the melt from the constant volume container to the syringe, and the syringe moves downwards on both sides of the bag to open and close it by adsorbing the opening of the bag inside the transport can, which is transported below the syringe. A set of vacuum suction pads retreats, and in order to insert the nozzle at the lower end of the syringe into the mouth of the bag that has been opened by suction by these vacuum suction pads, these vacuum suction pads are raised, and after the suction is released. a vacuum suction pad vertical movement mechanism that lowers the vacuum suction pad; a clamp device that clamps the opening of the bag after the nozzle is inserted and releases the clamping after filling a fixed volume of melt; and a clamp device that transports the syringe downward. After inserting the nozzle, the transport can is raised from the first height to a second height, and while the melt is injected by the injector, the second
An automatic bagging device for molten material, comprising: a lifter that raises the bag from the height of the clamp device to a third height, and lowers the bagger from the third height to the first height after the clamping device releases the clamping device. 3. After filling the fixed volume of melt, a small filling machine is provided, which measures the filling weight including the transport can and injects the melt into the bag little by little until a predetermined weight is reached. A small filling syringe having a nozzle and a built-in valve piston for opening and closing the nozzle, and a vertical cylinder connected to the melt supply source with piping, the piston being fitted so as to be vertically slidable; a receiver capable of containing the melt by pushing it up with the pressure of the melt pumped from the melt supply source; and a syringe for small filling that is attached to the receiver and pushes down the piston to push the melt from the receiver. 3. The automatic bagging apparatus for melted material according to claim 2, further comprising a pressurizing actuator for pushing out the melted material.