JPH032730B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic feeding device for packaging bags used in a series of facilities for bagging flour and other powdery materials. Equipment that automates the bagging of powder and granules has been known for some time, and these usually have a built-in hopper, screw feeder, etc. for storing powder and granules, and project a certain amount of powder and granules to the outside. An automatic quantitative filling device for powder and granular material configured to be discharged from a blowing pipe, and a packaging bag for filling the powder and granular material are taken out one by one from a magazine, and the filling device is opened with the filling port opened. It consists of a combination with a bag feeding device that feeds the bag by fitting it into the blowing pipe. Among these, a known bag feeding device is disclosed in Japanese Patent Publication No. 12360/1983, for example.
In this method, packaging bags (hereinafter simply referred to as bags) are bundled horizontally and stored in a magazine, and a filling hole located at one corner of the lower end of the bag taken out in the thickness direction is opened, and the filling hole is The bag is rotated 90 degrees from horizontal to vertical around the center, and the filling hole is inserted into the blowing tube of the filling device. However, regarding this type of bag feeding device, several points need to be improved. One of them is for the magazine that stores the bags.
Although it is necessary to store the bag in a predetermined position, that is, with the filling hole at a fixed position, this operation is complicated and causes a decrease in work efficiency. This is due to the fact that the process of unpacking and separating a bundle of bags purchased from a bag manufacturer and placing them in a magazine in a horizontal position requires manual labor. Another problem is that the filling device and the bag feeding device are arranged in a one-to-one relationship due to the above-mentioned relationship. Originally, the bag feeding device has a completely separate function from the filling device, so if one bag feeding device could be applied to multiple filling devices, it would be extremely advantageous in terms of equipment and cost. This is because it is difficult to adopt such a configuration with such a device. Another problem is that the operation of inserting the filling hole of the bag into the blowing pipe of the filling device is performed by changing the orientation of the bag from horizontal to vertical. This method requires high precision in positioning the bag, which is difficult. This is because it is undesirable to have a loose fitting relationship between the diameter of the filling hole of the bag and the diameter of the blowing pipe with too large a gap from the viewpoint of leakage of powder and granular material during filling. The present invention has been made based on these assumptions, and is intended to provide a novel bag feeding device by fundamentally changing the concept of conventional bag feeding devices. One of the objects of the present invention is to provide an apparatus that can supply bags by simply unpacking a bundle of bags purchased from a bag manufacturer and placing them in a predetermined location. Another object of the present invention is to consider the functions of each part of the bag feeding device in decomposition, and to share as much of the parts that can be shared among a plurality of filling devices as possible. Still another object of the present invention is to provide an apparatus that allows the operation of inserting the filling hole of the bag into the blowing tube to be easily and accurately performed. The gist of the present invention to achieve such an object is to provide a bag loading device for loading a large number of packaging bags horizontally on a horizontal table rotatable around a vertical axis; a take-out device that sequentially transfers the bags in the upper tier one by one onto an adjacent horizontal transport conveyor;
A guide means for vertically changing and guiding the feeding bag to a lower stop position, and a filling hole near the upper end of the bag in the vertical position that has reached the stop position using an upper suction cup and a clamp rod on both sides. The bag loading device includes a support device that supports the bag in an open state, and a horizontal movement mechanism of the support device that inserts a filling hole of the opened bag into a blowing pipe protruding from a powder filling device attached thereto. The bag feeding device is characterized in that a horizontal table rotating device is connected to the horizontal table for positioning the filling hole of the bag on the rear side in the feeding direction. The present invention will be described below based on embodiments shown in the drawings. FIG. 1 shows an overall outline of an example in which a bag feeding device is applied to two powder and granular material filling devices 1, 1. In the figure, 2 is a bag loading device, and a stand 3
A horizontal table 4 on a circular plate is placed above, and this horizontal table 4
A large number of bags P are stacked on top in a flat state. Further, the horizontal table 4 has a gear formed around its periphery, and is provided so that it can rotate every 90 degrees around a vertical central axis by meshing with a gear on the motor 5 side. Further, the pedestal 3 is provided so that it can be raised and lowered in a horizontal state by an elevator 6 consisting of folding legs 7 and a push-up cylinder device 8. It is now possible to maintain a constant level. Note that 9 is a base. The loading example of such a bag loading device 2 is shown in the second example.
As shown in Figures A and B, in this example, a bundle of bags delivered from a bag manufacturer is generally grouped into groups of about 25 bags with their filling openings aligned, and these bags are rotated 90 degrees in sequence. Although it is in a bundled state (see Figure 2 A and B), if you simply unpack it and place it on the horizontal table 4, the rest will be done on the horizontal table 4.
It has the feature that the feeding position can be kept constant by rotating 90 degrees at a time. Furthermore, the second
Figure A shows a state in which the pedestal 3 is lowered and a bundle of bags is placed thereon, and after being placed, the pedestal 3 is raised as shown by the arrow. Next, 10 shown in FIG. 1 is a take-out device that sends out the uppermost bags of the loading device 2 one by one to an adjacent conveyor, and includes a vertically movable cylinder device 11 having a suction cup 12 at the lower end, and this vertically movable cylinder device. It consists of a horizontal movable cylinder device 13 that moves the entire bag in the horizontal direction, and moves in the direction of arrow A from the position and state shown by the solid line in the figure to the position and state shown by the broken line, and moves the loaded bag to the top. The bag is taken out one by one by lifting the upper one with a suction cup 12, returning to the dotted line position in the direction of arrow B, and dropping the bag. In this example, a lateral position adjustment cylinder device 14 is attached to the vertically movable cylinder device 11, and the lateral position can be corrected in conjunction with a lateral position detection photoelectric switch 15. Each part constituting these take-out devices and the horizontal transport conveyor described below are supported in a fixed or movable manner by a predetermined support frame 16 constructed using an angle or the like. Reference numerals 17 and 18 are horizontal conveyors, and in this example, the second conveyor 18 is placed adjacent to the loading device 2 in contrast to the first conveyor 17 that receives the bags taken out one by one by the take-out device 10 . 1
It is installed downstream of the conveyor.
A switchable guide means is interposed between the first and second conveyors 17 and 18.
In addition, at both lower end portions of each conveyor 17, 18,
Driven rollers 19 and 20 are arranged in contact with the upper surface thereof,
This prevents the tip of the bag being fed from lifting up. 21 is a switching type guide interposed between the first and second conveyors 17 and 18; 22 is a fixed type guide provided adjacent to the downstream side of the second conveyor 18; The top of the bag is conveyed in the direction of arrow C, and the leading end of the bag is turned downward and guided downward in the direction of arrow D. As shown in FIG. 3, the switching type guide means is provided so as to be switched between the solid line position and the chain line position by a driving means (not shown), and in the solid line position, the bag being conveyed is moved downward. In the position indicated by the chain line, the bags being conveyed are sent to the second conveyor 18. This means that the bag feeding device in this example has two filling devices 1 and 1.
This is for distributing and supplying bags to people. Next, a device for inserting the bag sent downward from the guide means into the suction pipes 1', 1' of the filling device with its filling hole opened will be explained. Since the same devices are provided corresponding to the filling devices 1 and 1 of the table, in principle, one of them (on the right side in Figure 1) will be explained, and the other one will be indicated with the same reference numerals. do. The bag sent downward from the guide means 21 in a vertical position is stopped at the stop position. In this example, the locking means for this stop position is composed of:
As shown in FIG.
The upper ends of these plates are provided with flanges 23', 24' extending toward opposite sides, respectively. In this example, the upper end flanges 23', 24' of these plates 23, 24 are the upper end bottom part of the bag P.
P' (usually referred to as ears) is locked to support the bag P, and also ensures engagement with the upper end flanges 23' and 24' of the bag's upper end side bottom tension part P'. In order to smooth it out, in this example, an air blow (indicated by the arrow in Fig. 4B) is applied to the bag P while it is being fed downward so as to make the bottom part P' stand up in relation to the entire bag P. ing. In FIG. 4, reference numeral 25 is a guide plate, and 26 is a bag holding roller, and the one plate 24 and the holding roller 26 are moved at a predetermined timing around a shaft 27 to ensure the entry of the lower end of the bag. It is designed to tilt and stand up. The cylinder device designated 28 in FIG. 1 is a drive device for this purpose. As will be described later, when the bag P locked at the stop position is sent out from the loading device 2 , the filling hole is on the rear end side of the conveyance (that is, on the upper end side at the stop position).
Therefore, the filling hole in the bottom part of the upper end located at the upper end of the bag is connected to the suction cup 29.
Then, it is held in an open state by a pair of clamping rods 30, 30 on both sides, and is supported by a support device. This state is shown in Figure 5 A and B. The structure and function of the suction cup 29 and the pair of clamping rods 30, 30 are such that the suction cup 29 contacts the upper surface of the upper end side bottom part and lifts it upward, thereby expanding the bottom part into a diamond shape. As a result, the filling hole facing the side is opened, and the diamond-shaped bottom part is held by the clamping rods 30, 30 attached to the tips of the pair of arms 31, 31 that expand and contract. It has come to be held and supported. As described above, when the bag is supported by the suction cup 29 and the clamping rods 30, 30 with its filling hole open,
One plate 2 constituting the locking member at the stop position
3 is retracted from the side position of the bag P. This is because, in this example, the bag is moved to the same side (in the direction of arrow E in FIG. 1) when the bag is inserted into the blowing pipe of the filling device. code 4
0 indicates a cylinder device for retracting the plate 23. In this example, after the bag at the stop position is moved laterally, the filling hole is inserted into the suction pipe 1' of the filling device 1 because
This is to speed up the work by transporting the next bag and opening the filling hole during filling of the powder or granular material. Figures 6A and 6B show the outline of the operation when the filling hole of the upper end side bottom tension part P' is opened and inserted into the blowing pipe 1' of the filling device 1. The broken line shows the locus of movement of the filling hole portion of the bag P.
1" is a measuring instrument. In FIGS. 6A and 6B, the bag P supported by a support device (not shown) moves along an arcuate trajectory from the stop position (the position shown in FIG. 6B) to the blowing pipe 1. Directly facing ′,
After that, it advances further until it reaches a predetermined filling position and is stopped. Figure 7 A and B show the support device 32 (pinch rods 30, 30 and suction cup 29) used in this example.
A swing arm 37 containing a pair of shafts 34 and 35 connected by a timing belt 36 is rotated around the shaft 34 by a swing cylinder device 38. The support device 32 is translated in the downward direction of the arrow along an arcuate trajectory, and then the entire support device 32 including the swing arm 37 is moved in the direction of the arrow G (direction of the filling device) using the reciprocating cylinder device 39. It is designed to be moved. Note that the reference numeral 41 in FIG. 7 indicates a cylinder device for driving the arm 31 of the support device 32 . The bag feeding device configured as described above sends the bags P, which are taken out one by one from the bag loading device 2 at a predetermined timing, to each filling device 1, 1 according to the switching of the guide means 21, and when the bags P are placed at the stop position. It operates by opening the filling hole of the bag and inserting it into the blowing pipe 1' of the filling device, but the operation and timing of each cylinder device etc. is based on signals from a photoelectric switch, etc. (not shown). The system is controlled and driven by a control device incorporating a microprocessor, and FIG. 8 is a flowchart showing an example of such a series of operations. According to the above-described bag feeding device, a bundle of bags delivered from a bag manufacturer is simply unpacked and stacked on one bag loading device 2 , and the feeding position of the bags is automatically adjusted. The bag is transported while correcting and controlling the bag, and the filling hole is opened and the suction pipe is inserted into the bag. This improves work efficiency, reduces the size of equipment, or allows the bag to be used for multiple purposes. hole,
Since the bag can be inserted straight into the blowing pipe, the accuracy required for positioning and the like is reduced, and bag feeding errors are also reduced, which has extremely great results. It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that the present invention may be modified in various ways with respect to the overall equipment layout, the shape and structure of individual devices, etc. .

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the configuration of an embodiment of the bag feeding device according to the present invention, and Fig. 2 A and B are views showing a part of the bag loading device, where A is a front view and B is a bag loading state. A plan view, FIG. 3 is a partially enlarged view of the conveyor and the guide part, FIG. FIG. 6 shows a state in which the filling hole is supported in an open state.
Figures A and B are diagrams explaining the state when the bag is inserted into the blowing pipe of the filling device, Figures 7A and B are diagrams showing the structure of the support device and horizontal movement mechanism, and Figure 8 is the present embodiment. It is a flowchart explaining the operation of the device. 1: Filling device, 1′: Blow pipe, 1″: Measuring device,
2: Bag loading device, 3: Frame, 4: Horizontal stand, 5: Rotation motor, 6: Elevator, 7: Folding legs, 8: Push-up cylinder device, 9: Base, 10 : Take-out device, 11: Vertical movable cylinder device, 12: Suction cup,
13: horizontal movable cylinder device, 14: cylinder device for position adjustment, 15: photoelectric switch for lateral position detection, 16: support frame, 17, 18: horizontal conveyor, 19, 20: driven roller, 21: switching type guide, 22: Fixed guide, 23, 24: Plate, 23', 24': Upper end flange, 25: Guide plate, 26: Bag holding roller, 27: Shaft, 28:
Plate tilting cylinder device, 29: Suction cup, 3
0: Holding rod, 31: Arm, 32: Support device, 3
3: Horizontal movement mechanism, 34, 35: Axis, 36: Timing belt, 37: Swing arm, 38: Swing cylinder device, 39: Reciprocating cylinder device,
40: Cylinder device for plate retraction, 41: Cylinder device for arm drive.

Claims (1)

[Scope of Claims] 1. A bag loading device that loads a large number of packaging bags horizontally on a horizontal stand that is rotatable around a vertical axis, and a bag at the top of the horizontal stand is placed on an adjacent horizontal transport conveyor. a take-out device that sequentially hits and transfers one bag; a guide means located downstream of the horizontal transport conveyor that changes and guides the feed bags vertically to a lower stop position; A support device that supports the vicinity of the filling hole at the upper end of the bag in an open state with an upper suction cup and both side clamping rods, and a blowing pipe protruding from the attached powder filling device are used to hold the opened bag. a horizontal movement mechanism for the support device into which the filling hole is inserted;
A bag feeding device characterized in that a horizontal table rotation device is connected to position the filling hole of the bag on the rear side in the feeding direction. 2. The automatic bag feeding device according to claim 1, wherein a plurality of downstream devices from the guide means are installed in parallel to a set of devices from the bag loading device to the horizontal conveyor.