JPS6149170B2 - - 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 granular materials. To be more specific, 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. The present invention also relates to a device for closing and compressing the mouth of the bag after it has been put into the bag.

(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 are used for loading an empty bag into the chute input port, opening the bag mouth, closing the bag mouth after loading powder and granular material, and crimping. was established.

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 bag fixing device g provided on the chute f, and (5) it is opened by the bag inserting device c and the suction cup d.

(6) After opening the lower part of the chute f (Fig. 8) and loading 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 previously discovered that, unlike conventionally known bagging machines, the bag transfer, opening/closing, and crimping of the bag mouth 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. This basic principle of the invention will be explained below with reference to FIGS. 1 to 6.

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 provided, 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 bagging section. 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.

However, if the suction force increases when the bag 13 is attracted to the transfer belts 1, 1', the transfer belts 1, 1'
1' and the air box 5 increases, there is a risk that the transfer belts 1, 1' may slip with respect to the drive wheel 4, causing problems in the driving and synchronization of the transfer belts 1, 1'.

(Problems to be Solved by the Invention) Considering the problems of the previous invention, which are the basis of the above description, when the bag 13 is attracted to the transfer belts 1, 1', the adsorption force increases, and the transfer belts 1, 1' Even if the contact resistance between the air box 5 and the transport belt 1, 1' increases,
The purpose of this invention is to enable the transfer belts 1, 1' to be driven smoothly without slipping relative to the drive wheel 4.

(Solution by the Invention) A pair of endless transfer belts each having a large number of through holes over the entire surface for conveying bags,
The opposing inner sides are parallel to each other at the entry side and the exit side, and are arranged so that they form a diamond shape in a plan view at the middle part, and are provided on the inner sides of the opposite sides of both endless transfer belts over almost the entire length. An air box having an air hole for sucking air through the through hole of the endless transfer belt is installed, a chain is attached to both side edges of the transfer belt, and a sprocket is attached to the drive wheel and the guide wheel. It was designed to be driven by meshing with the

(Example) Details of the drive section of the present invention will be described below with reference to FIG. 10. Note that the configuration is the same as that of the previous invention, which is the basis except for the drive unit, so detailed description will be omitted.

In FIG. 10, a sprocket 16 is fixed to the end of the shaft 4a of the driving wheel 4. As shown in FIG. On the other hand, chains 15 are attached to both side edges of the transfer belts 1, 1' via brackets 17. The chain 15 is then engaged with the sprocket 16. Because it is like this, transfer belt 1,
1' will never slip with respect to the drive wheel 4 or the guide wheels 2, 3, so there is no fear of the above-mentioned problems, and the transfer belt can be driven very regularly.

(Operation) The bagging machine of the present invention has the above-described configuration, and after the bags 13 are fed to the device manually or by a separately provided automatic feeding mechanism, the bags 13 are automatically opened and sealed. be exposed. The operation of this device will be explained below with reference to FIG.

The supplied bag 13 is continuously transferred to the right (arrow) in the figure by the rotation of the transfer belt while being sandwiched and attracted between the transfer belts 1 and 1' (FIG. 6-a).

When the bag 13 reaches the part where the distance between the transfer belts 1 and 1' widens, the bag 13 is transferred to the transfer belts 1 and 1'.
Since it is absorbed by the bag, it is inflated together with the transfer belt, and the mouth of the bag gradually opens (Figure 6-B).

When the mouth of the bag is completely open (Fig. 6-C)
Then, the powder and granular material is charged into the bag 13 through the chute input port 8.

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 mouth gradually begins to close together with the transfer belt (FIG. 6-d).

The transfer belts 1, 1' are again in contact and parallel (Fig. 6-E), and the bag opening is connected to the transfer belts 1, 1'.
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 mechanism of the present device integrates the bag transfer mechanism and the bag suction mechanism, making it a much simpler mechanism than conventionally known devices. That is, the number of moving parts is only a pair of belts, and adjustment, maintenance and inspection are easy, and the device can be provided at a low cost.

Furthermore, since the pair of transfer belts moves in a circular motion, continuous work is possible, which has the advantage of highly efficient operation.

In particular, chains are installed on both sides of the transfer belt,
By meshing this with sprockets attached to the drive wheel and guide wheel, extremely regular driving became possible.

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 into bags is not limited to powder or granule 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/closing device according to the basic principle invention. Figure 2 is a schematic diagram of the plane. FIG. 3 shows a schematic front view thereof. FIG. 4 is a perspective view showing the relationship between the air box and the air suction pump in FIG. 1. FIG. 5 is an exploded perspective view illustrating the relationship between the air box, the transfer belt, and the suction portion of the bag in FIG. 1. FIG. 6 is an explanatory diagram of the operation mode of the bag according to the embodiment of 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 detailed sectional view of the transfer belt and drive wheel according to the invention. In the figure; 1, 1'... transfer belt, 2...
(Entrance side) Guide car, 3... (middle part) Guide car, 4
...(Exit side) Drive vehicle, 4a...(Drive vehicle)
Shaft, 5... Air box, 5a... Inclined wall (of the air box), 6... Drive device, 7... Synchronization mechanism, 8... Chute inlet, 9... Air hole (of the transfer belt),
10...Air hole (of air box), 11...Piping, 1
2... Air suction pump, 13... Bag, 14... Frame, 15... Chain, 16... Sprocket,
17...Bracket.

Claims (1)

[Claims] 1. A pair of endless transfer belts with a large number of through holes formed over the entire surface for conveying bags, with the opposing inner spaces parallel to each other at the entry side and exit side, and the middle section being parallel to each other in plan view. An air box is disposed oppositely so as to form a rhombus shape, and has air holes for sucking air through the through-holes of the endless transfer belt over substantially the entire length thereof, and is installed on the inner side of the opposite side of both the endless transfer belts. , chains 15 at both side edges of the transfer belt.
A suction belt type bag opening/closing device characterized in that the chain is attached to a sprocket 16 attached to a drive wheel and a guide wheel.