JPH0476848B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device for opening bags filled with powder and granules, and is particularly used for opening and stuffing paper bags filled with brown rice in large-scale rice milling factories. The present invention relates to a bag opening device.

Conventional technology and its background Currently, automation of each process is being implemented in large-scale rice milling factories, and labor savings are being promoted through computer-based centralized control and automatic control in departments from milling to measuring and packaging. However, in terms of the receiving department, incoming paper bags, etc., still need to be opened and stacked manually, which not only requires more manpower, but also has a strong need for improvement in terms of the working environment. In response to this, some rice milling factories have introduced so-called bag-opening devices to improve operations, but conventional bag-opening devices were developed for heat-sealed plastic bags, etc. Although it is widely used in the field, it has been impossible to completely discharge the brown rice when opening a paper bag filled with brown rice. In other words, in order to facilitate standard inspection, the paper bag's upper opening is tied with a string so that it can be opened and closed. Fold it at the center of the bag opening at a 10cm point and tie it with the left and right opening strings.

Conventional bag-opening devices convey a paper bag, incise the front and both sides to discharge the brown rice, and then unfold the bag after opening. When the bag was transported and cut open, the incision at the folded part of the bag was incomplete, and a large amount of brown rice remained after the bag was opened, making it unsuitable for practical use. On the other hand, even if the paper bags are conveyed in a constant direction, the fastening part of each bag is transported with the fastening part at the rear, the three sides are cut open except for the fastening part, and the bag is unfolded after being opened, brown rice still remains in the bag. The brown rice got stuck in the folded part of the bag, and attempts were made to shake out the brown rice by shaking it when it was unfolded, but it did not completely detach from the bag. In addition, a bag-opening device using a cylindrical rotating sieve screen separator that separates the bag from the powder and granules of the filler after vertically cutting the bag into strips with a cutter (for example, Japanese Patent Laid-Open No. 59-59255 However, this method increases the size of the device and increases the equipment cost. The presence of residue not only causes loss of brown rice, but also makes it difficult to reuse empty bags because if more than a certain amount of brown rice grains remain, the brown rice grains will gelatinize when the paper bag is dissolved and processed, making reuse difficult. Ta.

Purpose of the Invention The present invention aims to develop a bag-opening device that can completely discharge paper bags filled with grains such as brown rice without leaving any residual grains, thereby saving labor and improving the work environment, especially in large-scale rice milling factories. The aim is to achieve improvements in

Structure of the Invention The present invention includes a bag incision section equipped with a cutter for cutting off the front and both sides of a bag that is transported with the fastening section of the bag filled with powder and granular material sealed at the opening. , a discharge section that flows down and discharges the powder and granular material after opening the bag;
In an apparatus having a bag expanding section for expanding and transporting an empty bag after opening, a cutter for cutting a fastening section is provided at the bag opening section, and a feed roll extends the empty bag after opening at the bag opening section. It is characterized by having the following.

Embodiment of the Invention An embodiment of the present invention will be specifically described below with reference to the drawings.

1 is a bag supply conveyor, 2 is a paper bag filled with grains, 3 is a bag opening device equipped with cutters 4, 5, 6, and 7, 8 is a flow path for tensioning, 9 is a tensioning hopper, and 10 is an empty bag. It is a bag processing machine.

The bag opening device 3 includes a bag body incision section 11 and a grain discharge section 1.
2. It is composed of a bag deployment section 13. Four of the bag body incision parts 11 are first ones for cutting the front part A (bottom of the paper bag body) of the paper bag body conveyed with the fastening part as the rear part.
cutters 5 and 6 are second and third cutters for cutting both sides of the paper bag body; reference numerals 14, 15, and 16 are motors that rotationally drive the respective cutters;
7 is a fourth cutter for cutting the fastening part B; 17;
is the motor that rotates the cutter. 1st
The cutter 4 and the fourth cutter 7 are provided to be able to raise and lower freely, and 18 and 19 are cutter raising and lowering devices for the first cutter 4 and the fourth cutter 7.
It consists of arms 20, 21, air cylinders 22, 23, etc., and 24, 25 are respective rotation axes. 26 is a bag conveyance belt wound around pulleys 27 and 28, 29 is a guide wall provided on the bag conveyance belt 26, and 30 and 31 are limit switches for sensing the bag position. A grain discharge port 32 for discharging the cut grains is opened in the grain discharge portion 12. The bag deployment unit 13 has a plurality of Vs for transporting empty bags.
A belt 33 is wound around pulleys 34 and 35, and 3
6 is a triangular cam-shaped vibrating body, 37 and 38 are primary feed rolls which are an upper and lower pair, and 39 and 40 are also secondary feed rolls which are an upper and lower pair. The feed speed of the secondary feed rolls 39 and 40 is configured to be faster than that of the primary feed rolls 37 and 38. Reference numeral 42 denotes a bag outlet for sending empty bags to the empty bag processing machine 10.

The fastening section includes the above-mentioned fastening section that fastens the bag using the string, as well as a fastening section formed by sewing with a sewing machine or the like.

Next, the operation of the present invention will be described. The paper bag body 2 filled with grains is conveyed by the bag supply conveyor 1 to the bag opening device 3 with the fastening part B at the rear, and is guided to the guide wall 29. The bag is conveyed to the bag incision section 11 on the bag conveyor belt 26 while being moved. If the conveyance speed of the bag supply conveyor 1 is, for example, 7 m/min, then the conveyance speed of the bag conveyance belt 26 is 18 m/min.
The structure is such that an appropriate distance can be provided between the paper bag bodies. When the front part A (bottom of the paper bag) of the paper bag conveyed inside the bag incision 11 contacts the limit switch 30, the fourth cutter 7 is lowered by the action of the cutter raising/lowering device 19 based on the signal. Then, the fastening part B at the rear of the bag is cut, and at the same time, the first cutter 4 cuts the front part A (bottom of the paper bag) of the paper bag, and the tip of the paper bag is connected to the next limit switch 31. Upon contact, the signal causes the cutter lifting device 18 to operate and move the first cutter 4 upward. After a predetermined period of time has elapsed, the first cutter 4 descends again to meet the paper bag to be conveyed next. On the other hand, the fourth cutter 7
is moved up and down by signals from two limit switches 30 and 31.

The paper bag 2 further transported on the bag transport belt 26 is cut at both sides by second and third cutters 5 and 6 provided at the downstream end of the transport belt, and is filled with grains. The paper bag that had been stored is transferred to the bag opening 13 while discharging the grains from the incision.
The bag is unfolded with its inner surface facing downward (see FIG. 2) and transported on a plurality of V-belts 33 for transporting empty bags.
In this bag development section 13, the feed speed of the downstream feed rolls 39, 40 is adjusted to the feed speed of the upstream feed roll 3.
By increasing the feed speed faster than the feeding speed in steps 7 and 38, the incised bag is stretched and the folded part is relaxed, and the triangular cam-shaped vibrating body 36 is activated to completely remove the remaining grains that have bitten into the folded part. to be discharged. The empty bags flow down from the bag body discharge port 42 to the empty bag processing machine 10, are compressed as appropriate, and are collected.

Effects of the Invention As explained above, when opening a paper bag filled with grains, the present invention not only cuts the three sides excluding the fastening part, but also cuts the fastening part with a cutter. Furthermore, by stretching the empty bag with a feed roll, the folded part is relaxed and complete ejection without residual grains is achieved.The simple structure makes the device compact and allows the paper bag body to be used to hold brown rice for improving large-scale rice milling. This will stably automate and save labor, and further improve the working environment.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a bag opening device according to an embodiment of the present invention, FIG. 2 is a side sectional view of a main part of the bag opening device of the present invention, and FIG. 3 is a perspective view of the main part. 1...Bag body supply conveyor, 2...Paper bag body, 3...
...Bag opening device, 4...Cutter, 5...Cutter,
6... cutter, 7... cutter, 8... flow path, 9... tension hopper, 10... empty bag processing machine, 11... bag body incision section, 12... discharge section, 13
... Bag deployment part, 14 ... Motor, 15 ... Motor, 16 ... Motor, 17 ... Motor,
18...Cutter's lifting device, 19...Cutter's lifting device, 20...Crank arm, 2
1... Crank arm, 22... Air cylinder, 23... Air cylinder, 24... Rotating shaft, 2
5... Rotating shaft, 26... Bag conveyance belt, 27...
Pull wheel, 28... Pull wheel, 29... Guide wall, 30...
Limit switch, 31...Limit switch, 32...Grain discharge port, 33...V belt, 3
4...pulley, 35...pulley, 36...vibrator, 3
7...Feed roll, 38...Feed roll, 39...
...Feed roll, 40...Feed roll, 41...Motor, 42...Bag body discharge port.

Claims (1)

[Claims] 1. A bag incision section equipped with a cutter to cut the front and both sides of the paper bag to be transported, with the fastening section of the paper bag filled with powder and the opening sealed as the rear part, and the bag incision section equipped with a cutter to cut the front and both sides of the paper bag that is transported with powder and granules sealed and the opening closed, and the bag incision section that is equipped with a cutter that cuts off the front and both sides of the paper bag that is transported as the rear part. In an apparatus having a discharge section for flowing down and discharging granules, and a bag unfolding section for unfolding and transporting an empty bag after opening, a cutter for cutting the fastening section is provided in the bag incision section, A bag opening device comprising a feed roll for stretching an empty bag after opening.