JPS6152050B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bag opening/closing device, such as a bagging machine for powder and granules. In an automatic or semi-automatic bagging machine that bags a fixed amount of powder or granular material continuously or intermittently, the opening of the bag into which a fixed amount of powder or granular material is introduced is opened, and This relates to a device for closing and crimping the mouth of a person.

(Prior Art) There is no similar bagging machine known in the art that can be compared with the present invention. In known bagging machines,
Separate mechanisms were provided for attaching an empty bag to the chute inlet, opening the mouth of the bag, closing the mouth of the bag after loading powder and granular material, and crimping.

For example, in the bagging machine shown in FIG. 7, bagging is performed through the following steps.

(1) The bag b supplied by the bag feeder a is (2) picked up by the suction cup d of the bag feeder c, and (3) fed into the chute by the horizontal transfer mechanism (bag feeder cylinder) e. (4) The end of the bag is held by the bagging device g provided on the chute f, and (5) it is opened by the bagging device c and the suction cup d.

(6) After opening the lower part of the chute f (Fig. 8) and inserting the powder, the bag is held by the bag fastening device g in (4) and the bag opening is crimped by the crimping device h. It is passed on to the next process (sewing etc.).

It is composed of individual mechanisms corresponding to each process. For this reason, the device becomes complicated, and there are disadvantages such as troublesome not only the combination but also the interlocking operation adjustment and maintenance inspection.

(Prior Invention Forming the Basis of the Present Invention) The present applicant has previously discovered that, unlike conventionally known bagging machines, the transfer of bags, the opening/closing of the bag opening, and the crimping are carried out by the rotational movement of a pair of endless belts. He invented and filed a patent application for a bag opening and sealing device that opens the bag by suctioning the air between the belt and the bag through the provided air holes and adhering the bag to the belt. The present invention is based on this invention as a basic principle. This basic principle of the invention will be explained below with reference to FIGS. 1 to 5.

Reference numerals 1 and 1' designate transfer belts that attract and transfer the bags 13, and are provided symmetrically with respect to the traveling line of the bags 13 in plan view, as shown in FIG. Transfer belt 1,
1' is guided in an annular manner by a guide wheel 2 on the entrance side, a guide wheel 3 on the intermediate part, a drive wheel 4 on the exit side, and an air box 5, and the bag opening is opened at a location below the chute input port 8. It is arranged so that powder and granular materials can be input. The pair of transfer belts 1 and 1' are driven by a drive device 6 via the drive wheel 4 in the direction of the arrow shown in FIG. There is.

On the other hand, the transfer belts 1 and 1' have a plurality of air holes 9, and the air box 5 has a plurality of air holes 10 along its entire length on the contact surface with the transfer belt, as shown in FIG. Further, the air in the air box 5 is sucked by an air suction pump 12 via a piping part 11. A total of four air boxes 5 are installed, two on the left and right in the direction of travel of the bag, and each air box is provided with an inclined wall 5a in the center to form a bag filling part. By arranging the inclined walls 5a symmetrically in a plane, a substantially diamond-shaped opening space is formed.

Therefore, if the air holes 9 of the transfer belts 1, 1' are made to overlap the air holes 10 of the air box, by operating the air suction pump 12, the bags 13 in contact with the transfer belts 1, 1' can be removed. is transfer belt 1,
1' and transported together with the transport belt.

(Problems to be Solved by the Invention) However, when guided in the state shown in FIG. Guide car 3 is bag 13
This may prevent complete opening of the package. More specifically, the bag opened at the entry side comes into contact with the guide roller 3 and is braked, which not only prevents it from moving smoothly toward the exit side, but also causes the bag opening to close easily, causing damage to the bag. This will cause problems in the feeding of powder and granular materials.

The present invention takes this point into consideration, and attempts to prevent the presence of anything that would be an obstacle to opening the bag in the opening portion of the bag 13.

(Solution by the Invention) Two pairs of endless transport belts each having a large number of through holes over the entire surface for transporting bags are provided.
The opposing inner sides are parallel to each other at the entry side and the exit side, and the intermediate portions are arranged opposite each other so as to form a diamond shape in a plan view. An air box having air holes for sucking air through the through holes of the endless transfer belt is installed along its entire length, and the inlet transfer belt is endlessly hung on two guide wheels, and the outlet transfer belt is hung endlessly on two guide wheels. They are endlessly hung on the guide car and drive car, respectively.
Adjacent guide wheels in the middle part can be interlocked by winding chains around sprockets attached to the shafts of these guide wheels.

(Example) Hereinafter, it will be explained based on FIG. 10 and FIG. 11. Reference numerals 15 and 16 indicate intermediate guide wheels, which are spaced apart from each other in the bag transport direction, and are connected by a chain 19. The transfer belt is composed of four transfer belts 1, 1', 1'', and 1, and the transfer belts 1 and 1' on the entry side have a guide wheel 2 and a guide wheel 16.
It is hung endlessly in between. Further, the transfer belts 1'' and 1 are endlessly hung between the guide wheel 16 and the drive wheel 4.The drive wheels 4 and 4 are connected by a synchronization mechanism 7 and receive the rotation of the drive device 6 in a synchronous state. As a result, the pair of transfer belts on the left and right in the transfer direction are driven synchronously.The driving force from the drive device 6 is transmitted from the drive wheel 4 to the transfer belt 1.
→ Guide wheel 15 → Sprocket 17 → Chain 1
9→sprocket 18→guide wheel 16→transfer belt 1'. Also, from the drive device 6 to the synchronization mechanism 7 → drive wheel 4 → transfer belt 1'' → guide wheel 15 →
The other transfer belt is also driven in the order of sprocket 17→chain 19→sprocket 18→guide wheel 16→transfer belt 1.

(Operation) The bagging machine of the present invention has the above-described configuration, and after the bags 13 are supplied to the device manually or by an automatic bag supplying machine provided separately, the bags 13 are automatically opened and sealed. . The operation of this device will be explained.

The supplied bag 13 is held and attracted between the transfer belts 1 and 1' and is continuously transferred to the right in FIG. 10 by the rotation of the transfer belt.

When the bag 113 reaches the part where the distance between the transfer belts 1 and 1' widens, the bag 113 is transferred to the transfer belts 1 and 1'.
Since it is absorbed by the bag, it is inflated together with the transport belt, and the mouth of the bag gradually opens.

Powder and granular material is charged into the bag 13 through the chute input port 8 with the mouth of the bag completely opened.

After the introduction of the powder and granular material is completed, the distance between the transfer belts 1 and 1' begins to narrow, and since the bag 13 is attracted to the transfer belt, the bag opening gradually begins to close together with the transfer belt.

The transfer belts 1 and 1' are brought into contact and parallel again, and the bag opening is pinched and attracted between the transfer belts 1 and 1', and is completely closed.

When the above series of steps are completed, the bag 13 is transferred to a sealing device for the next step.

The weight of the bag and the powder after the granular material has been introduced is supported by a bag receiving device (not shown) provided below the bag, and is transferred in synchronization with the transfer belts 1, 1'.

(Effects) As described above, according to the present invention, the bag transfer mechanism and bag suction mechanism are integrated, resulting in a much simpler mechanism than conventionally known devices. That is, the number of movable parts is small with only two pairs of belts, adjustment, maintenance and inspection are easy, and the device can be supplied at low cost.

Furthermore, since the two pairs of transfer belts each move in circulation, continuous work is possible and highly efficient operation is possible. In particular, since the intermediate guide wheel is positioned between the air boxes, the guide wheel will not get caught between the transfer belt and the bag, and there is no worry that the opening of the bag will be obstructed. The opening is extremely smooth.

Of the two pairs of endless transfer belts facing left and right in the bag transfer direction, the inlet transfer belts 1 and 1' are endlessly hung in the guide wheels 2 and 16, respectively, and the outlet transfer belts 1'' and 1 are hung endlessly in the guide wheels 2 and 16, respectively. Guide car 15
and the drive wheel 4, respectively, and the adjacent guide wheels 5 and 16 in the middle part are connected to sprockets 17 and 18 attached to the shafts of these guide wheels.
Since the chain is wound around the chain to enable interlocking, the intermediate guide wheels 15 and 16 do not get in the way of the bag 13, so the bag can be transferred smoothly.

In the above description, a bag filling machine has been described, but the present invention can be generally applied to cases where it is necessary to open and seal bags.

Therefore, the material to be packed in the bag is not limited to powder or granular materials, but of course liquid materials can also be used.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a bag opening and sealing device according to the basic principle invention, FIG. 2 is a schematic plan view thereof, and FIG. 3 is a schematic front view thereof. Figure 4 is a perspective view showing the relationship between the air box and air suction pump in Figure 1, Figure 5 is the air box in Figure 1,
FIG. 3 is an exploded perspective view illustrating the relationship between the transfer belt and the suction portion of the bag. FIG. 6-A to FIG. 6-H are explanatory diagrams of the operation mode of the bag of the embodiment according to the present invention;
FIG. 7 shows an example of a conventionally known automatic bagging machine. FIG. 8 shows the chute in the open state, and FIG. 9 shows the chute in the closed state. FIG. 10 is a plan view showing an embodiment of the present invention, and FIG. 11 is a front view. In the figure: 1, 1': transfer belt, 2: (inlet side) guide wheel, 3: (middle section) guide wheel, 4... (exit side) drive wheel, 5: air box, 5a: (air box)
Inclined wall, 6: Drive device, 7: Synchronization mechanism, 8: Chute inlet, 9: Air hole (of transfer belt), 1
0: Air hole (of air box), 11: Piping, 12: Air suction pump, : 13: Bag, 14: Frame, 15,
16: Guide wheel, 17, 18: Sprocket, 1
9: Chain.

Claims (1)

[Claims] 1. Two pairs of endless transfer belts with a large number of through holes formed over the entire surface for conveying bags are arranged so that the opposing inner spaces are parallel to each other at the entry side and the exit side, and the middle part is parallel to each other in plan view. An air box is disposed oppositely to form a rhombus shape, and has an air box having an air hole for sucking air through the through hole of the endless transfer belt over substantially the entire length thereof, on the inner side of the opposite side of the two pairs of endless transfer belts. The inlet transfer belts 1 and 1' are endlessly hung around the guide wheels 2 and 16, respectively, and the outlet transfer belts 1'' and 1 are endlessly hung around the guide wheels 15 and the drive wheel 4, respectively. The suction belt type bag opening/closing device is characterized in that adjacent guide wheels 15 and 16 in the middle part can be interlocked by winding a chain around sprockets 17 and 18 attached to the shafts of these guide wheels.