JPH07309315A - Bag opener - Google Patents

Abstract

PURPOSE:To efficiently unseal a bag such as a bag containing feed or the like with a simple facility and a space. CONSTITUTION:A rotating body part 2 is provided on a base 1, and a vertically movable arm 3 is provided at the body 2. The arm 3 is equipped with a fork 10 for holding a bag and a fixing cylinder for pressing the bag against the fork 10 to fix it, an air nozzle 14 for completely discharging contents from an unsealed bag and a solenoid valve 15 for intermittently blowing air from the air nozzle 14 are provided, and a cutter blade 23 for cutting the bag is further provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag opening device capable of carrying and opening bags containing powdered or granular materials such as feed materials.

[0002]

2. Description of the Related Art In a feed factory, various mixed feeds are manufactured by mixing a plurality of raw materials at a predetermined ratio, and the plurality of raw materials are brought into the feed factory in a bag. Then, the bags filled with these various raw materials are stored in a pallet in a temporary warehouse,
When producing feed, a bag is placed on a belt conveyor from a pallet by a robot or manually, and the bag conveyor conveys the bag to an open bag. Then, at the bag opening position, the bag is opened by the bag opening device, and the raw material is taken out and stored in a predetermined tank in a predetermined amount. The empty bag from which the raw material has been discharged is transported to the disposal unit.

[0003]

However, in the conventional bag opening method, the steps of transferring the bags stacked on the pallet to the conveyor, the step of conveying the bags to the bag opening part by the conveyor, and the bag opening part Since it requires a process of opening the bag, it takes a long time and costs much (a transfer robot, a conveyor, etc. are required depending on the type of the bag). In particular, in the case of a feed containing many kinds of raw materials, these problems were extremely serious.

Further, even in the case where a variety of raw materials such as chemicals are mixed in small amounts, that is, there are many types of bags but the number of one type of bag is small, the bag opening work can be efficiently performed. A device that can be used was desired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a bag opening device which can open bags of various kinds efficiently with simple equipment and space.

[0006]

The present invention has been made to achieve the above object, and a bag opening device according to the present invention is provided with a base and a base rotatably and vertically. A movable arm, bag holding means provided on the arm for holding a bag, and bag opening means for opening the bag held by the bag holding means.

The bag opening means opens the bag by cutting the bag, and may be cut by moving a cutter or a disc-shaped cutter, for example. Further, the form of bag opening by the bag opening means is not particularly limited as long as the bag product is laterally cut into one character or cross-shaped and other stored powder particles can be discharged.

The bag holding means may be any one that can hold the bag when the bag is opened, and can be appropriately selected depending on the cutting means and the cutting form, but normally a fork, a suction cup or the like is used.

The base is fixedly installed on the floor or the like, and the arm is provided on the base so as to be rotatable and movable in the vertical direction. Use an arm used for a palletizer, a crane or the like. You can

The shake-off mechanism applies vibration to the bag to efficiently discharge the powder and granules, and also discharges the powder and granules sandwiched in the peripheral portion, particularly the powder and granules remaining at the four corners of the sewing machine. What is necessary is just to make it possible to give vibration to the bag. For example, the bag is mechanically vibrated, mechanically hit, or compressed air is blown intermittently. Spraying of compressed air is preferable because it can be performed with a simple device.For spraying of this compressed air, for example, a spray nozzle that sprays air onto the bag, and a solenoid valve provided in the spray nozzle, This is done by a shake-off mechanism consisting of a control unit that controls the opening and closing of each solenoid valve and the opening and closing time according to the physical properties of the powder and granules. With such a sieving mechanism, it is possible to completely eliminate the residue of the powder and granules at the four corners of the sewing machine and to completely discharge the powder and granules, which could not be achieved in the past.

Bags contain powder and granules, and as the powder and granules, there are raw materials for feed such as pigs and chickens, raw materials for paints, and raw materials for simple body warmers.

[0012]

In the bag opening apparatus of the present invention, the arm conveys the bag to an arbitrary position, the bag holding means holds the bag on the arm, and the bag opening means opens the bag held by the bag holding means. Then, the powder or granular material stored in the bag is discharged at a predetermined place.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the bag opening device of the present invention will be described with reference to the drawings. 1 is a side view of the bag opening device, FIG. 2 is a front view of a main part of the bag opening device, FIG. 3 is a plan view of a main part of the bag opening device, and FIG. 4 is a bag using the bag opening device. FIG. 3 is a plan view showing the arrangement of each device for opening the bag.

In FIG. 1, reference numeral 1 is a base fixed to a floor, and a swing body 2 is provided on the base 1 so as to be rotatable. The swivel body portion 2 is provided with an arm portion 3 which includes an upper arm, a lower arm, a drive arm, and the like and is vertically movable. A frame 4 is fixed to the tip of the arm portion 3, and a horizontal width adjusting cylinder 5 for positioning the fork so as to fit the width of the bag is fixed to the frame 4. A vertical adjustment cylinder 6 for vertically moving the fork is fixed to the adjustment cylinder 5, and a rotation adjustment cylinder 7 for rotating the fork by 90 degrees is fixed to the vertical adjustment cylinder 6. A connecting plate 8 is rotatably connected to the tip of the piston shaft of the rotation adjusting cylinder 7, and the connecting plate 8 is rotatably provided around a shaft 9 fixedly provided to the rotation adjusting cylinder 7. At the same time, the fork 10 is fixed.

Further, at the four corners of the frame 4, a fixing cylinder for pressing and fixing the bag in the direction of the fork 10 is fixed.
11 is provided, and a suction cylinder 12 is provided in the approximate center.
Is provided. At the tip of the piston shaft of the suction cylinder 12, there is provided a suction portion 13 for sucking a bag, and the suction portion 13 is connected to a vacuum pump (not shown). The fork 10, the fixing cylinder 11 and the like form a bag holding means.

Further, a plurality of air nozzles 14 constituting a shake-down mechanism are provided at predetermined intervals at a location corresponding to the longitudinal edge of the bag held by the fork 10, and the air nozzles 14 are connected via a solenoid valve 15. It is connected to a compressor (not shown), and the solenoid valve 15 is connected to a controller (not shown) so as to intermittently blow out air from the air nozzle 14.

A blade rotating cylinder 16 and a mounting frame 17 are provided on the tip end side of the frame 4, and a connecting plate 19 is fixed to a rotatable shaft 18 of the mounting frame 17. The piston shaft of the blade rotating cylinder 16 is rotatably fixed to the connecting plate 19. A rotary plate 20 is provided on the shaft 18, and a blade advancing / retreating cylinder 21 is provided at an end of the rotary plate 20. A blade protruding cylinder 22 is provided at the tip of the piston shaft of the blade advancing / retreating cylinder 21, and a cutting blade 23 is fixed to the tip of the piston shaft of the blade protruding cylinder 22. The above-mentioned cutting blade 23 and the like constitute bag opening means for opening a bag.

To open a bag using such a bag opening device, each device is arranged as shown in FIG.

In FIG. 4, reference numeral 30 is the bag opening device described above, and four bag storage portions 40 are provided at substantially equal intervals around the bag opening device 30 and the bag opening device opens the bag. A unit 50 and an empty bag discharging unit 60 for discharging an empty bag that has been opened and the packing has been taken out are provided. The bag storage unit 40 is provided with a pallet (not shown), and the bag 70 is placed on the pallet. The bag opening portion 50 has a tray (not shown) for receiving the filler discharged from the bag 70.
The tray 51 is provided with a transfer conveyor (not shown) for transferring the filling to a tank (not shown). The empty bag discharge unit 60 is provided with a discharge conveyor (not shown) that receives an empty bag discharged from the bag opening apparatus 30 and conveys it to a discarding means.

The procedure of the bag opening device 30 is preliminarily entered according to the product to be opened, and the device operates according to this program.
For example, using feedstocks A, B, C, D, feeds I, II, II
When I is to be manufactured, the program shown in Table 1 is used.

[0021]

[Table 1]

A method of opening a bag with the above bag opening device will be described. First, the width adjustment cylinder 5 is adjusted to set the interval between the forks 10 according to the size of the bag 70 to be opened. Then, after rotating the arm 3 to move it to the programmed first bag storage unit 40A,
The arm 3 is lowered to bring the suction portion 13 into contact with the upper surface of the bag 70. Next, the vacuum pump is operated to adsorb the bag 70 by the adsorbing section 13, and then the adsorbing cylinder 12 is operated to raise the adsorbing section 13 to slightly lift the bag 70 from the pallet. Then, the rotation adjusting cylinder 7 is operated to activate the fork.
After rotating 10 by 90 degrees to hold the bag 70, the vertical adjustment cylinder 6 is operated to raise the fork 10, and the fixing cylinder 11 is operated to move the bag 70 to the fork 10.
The bag 70 is fixed by urging in the direction. Thus, the preparation for opening the bag 70 is completed, and the state shown in FIG. 5 is obtained.

To open the bag in the above state, first,
As shown in FIG. 6, the blade rotating cylinder 17 is operated to retract. Then, the rotary plate 19 rotates 90 degrees clockwise around the shaft 18 in the figure, and the cutting blade 23 becomes parallel to the bag 70. Then, as shown in FIG. 7, the blade advancing / retreating cylinder 21 is operated to extend the cutting blade 23 to the opposite side of the bag 70. And FIG.
As shown in, activate the blade protruding cylinder 22 to
After raising 23, as shown in FIG. 9, the blade advancing / retreating cylinder 21 is operated in reverse, and the cutting blade 23 is pulled back while cutting substantially the center of the bag 70 as shown by the cutting line A in FIG. Further, as shown in FIG. 10, after the blade protruding cylinder 22 is reversely operated to return the cutting blade 23, as shown in FIG. 11, the blade rotation cylinder 17 is reversely operated to rotate the rotary plate 20. Rotate by 90 degrees counterclockwise to return to the original state.

When the bag 70 is cut at substantially the center by the cutting blade 23, the stored raw material (powder or grain) is discharged from the cutting portion and dropped and stored in the tray of the bag opening portion 50. Also a cutting blade
23, at the same time as cutting the bag 70, the sieving mechanism is operated to prevent the raw material from remaining. That is, while intermittently operating the solenoid valve 15, air is intermittently sprayed from the air nozzle 14 onto the bag 70, and the end of the bag 70 vibrates due to this air spraying, so it is caught between the edges of the bag 70. The raw material is shaken out and is smoothly and completely discharged without remaining in the bag 70.

After the raw material is discharged by the air nozzle 14, the arm 3 is swung to the empty bag discharging section 60, and the fork is discharged.
10, the fixed cylinder 11 and the suction portion 13 are released, and the empty bag is dropped and discharged. Then, the next set bag 70 is swung to the bag storage unit 40, and the same operation is repeated.

[0026]

EFFECTS OF THE INVENTION According to the present invention, it is possible to carry out a bag-conveying operation for a bag containing powdery or granular material, a bag-opening operation, etc. at a single place, so that the use area related to the bag-opening operation can be reduced, and a carrying device or the like can be used. Since the number of facilities can be reduced, the bag can be opened efficiently and economically.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a bag opening device according to the present invention.

FIG. 2 is a schematic front view of a bag opening portion of an embodiment of the bag opening device of the present invention.

FIG. 3 is a schematic plan view of a bag opening portion of an embodiment of the bag opening device of the present invention.

FIG. 4 is a diagram showing a layout of equipment for opening bags using the bag opening device of the present invention.

FIG. 5 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

FIG. 6 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

FIG. 7 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

FIG. 8 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

FIG. 9 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

FIG. 10 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

FIG. 11 is a diagram showing a procedure for opening a bag with the bag opening device of the present invention.

[Explanation of symbols]

 1 ... Base 2 ... Revolving body 3 ... Arm 4 ... Frame 5 ... Horizontal adjustment cylinder 6 ... Vertical adjustment cylinder 7 ... Rotation adjustment cylinder 10 ... Fork 11 ... Fixing cylinder 12 ... Adsorption cylinder 13 ... Adsorption part 14 ... Air nozzle 15 ... Solenoid valve 17 ... Rotation cylinder 21 ... Blade advance / retreat cylinder 22 ... Blade protrusion cylinder 23 ... Cutting blade 30 ... Bag opener 40 ... Bag storage 50 ... Open bag 60 ... Empty bag discharge 70 ... Bag

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[Procedure amendment]

[Submission date] June 2, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Fig. 2]

[Figure 1]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 11

Claims (2)

[Claims] 1. A base, an arm rotatably mounted on the base and movable in the vertical direction, a bag holding means for holding a bag containing powder and granules, and a bag holding unit. And a bag opening device for opening the bag held by the device. 2. A plurality of spray nozzles for spraying air in the vicinity of the side edges of the bag held by the bag holding means, solenoid valves provided in each of the spray nozzles, and electromagnetic solenoids according to the physical properties of the powder and granules. The bag opening apparatus according to claim 1, further comprising a shake-off mechanism including a control unit that controls opening / closing of the valve and opening / closing time.