JP2000264318A - Bag unsealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely transfer the contents in a bag into a container or the like in a bag unsealing device and protect a human body, particularly a respiratory organ system, from the infiltration of dust generated when the bag is unsealed. SOLUTION: A bag unsealing device is provided with a mounting stand constituted of two tables 31a and 31b, left and right, set through a clearance 30 in the interior of the device, wherein the pressure is set negative, and revolved between the posture of lowering the edges facing each other and the horizontal posture of the tables 31a and 31b. A bag press section pressing the bags by a pressing pawl and revolved integrally with the tables 31a and 31b is set above the mounting stand, and a revolving blade 4 moved relatively along the clearance 30 is provided on the extension of the clearance 30. The bags are cut by moving the mounting stand toward the revolving plate 4. Then the tables 31a and 31b, left and right, are opened and closed several times to the lower side. A content is discharged while the empty bags are fixed on the tables 31a and 31b by the above operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for opening a bag containing a granular material such as a material powder to be a plastic material.

[0002]

2. Description of the Related Art In general, material powder, which is a plastic material, reagent powder used in a synthetic chemical factory, and feed powder of livestock are stored in a bag made of paper for convenience of storage and transportation. After a bag of this type is carried into a factory, it is usually opened manually with a knife such as a sickle.

[0003]

However, when the opening operation is manually performed, dust is generated due to the impact at the time of opening, and there is a concern that the respiratory system of the human body may be adversely affected.

[0004] On the other hand, it has been considered to automate the opening of the bag, but it is difficult to completely transfer the contents of the bag, which has been accurately packed by measurement and shipped, to, for example, a container. There is a possibility that a predetermined compounding ratio cannot be obtained for the product, and this has prevented automation.

An object of the present invention is to solve the above-mentioned problems and to provide a simple apparatus which makes it possible to take out the contents of a bag almost completely, and to automate this work.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a bag opening device for opening a bag containing powdery or granular materials, comprising a pair of tables arranged on the left and right sides with a gap therebetween, and the table extending over the gap. A mounting table on which the bags are mounted, bag holding means provided on a pair of tables for holding the bags mounted on the mounting table, and a relative movement with respect to the mounting table along the gap; While the table is rotated between a horizontal position and a cutting blade for cutting the bag on the mounting table pressed by the bag pressing means, and a position in which a facing edge on a side where the pair of tables face each other is lowered. Bag holding means, characterized in that, when the opposing edge of the table is lowered, the powdered granules fall and are discharged from the bag while the cut bag is pressed against the table. Are lined up and down, stab the bag and hold down What is used with a plurality of presser pawls, during this cutting of the bag, the force to the extent that the bag at the time of rotation of the table does not move from the table is added. The cutting blade rotates around a horizontal axis positioned above the bag on the mounting table, and moves relatively back and forth with respect to the mounting table. The contents can be taken out reliably.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bag opening apparatus according to the present invention will be described. First, an outline of opening a bag P using this apparatus will be described. Loading port 1 as shown in Fig. 2
1, a mounting table 31 including a pair of tables 31a and 31b which can be moved back and forth, which are disposed to the left and right through a gap 30 as shown in FIG. And a rotary blade 4 (in this example, the mounting table 31 moves back and forth with respect to the rotary blade 4) that relatively moves back and forth along the gap 30 of the mounting table 31. Is fixed to the mounting table 31 by the pressing claws 35 (pressed).

The mounting table 31 moves in the direction of the carry-out port 12, that is, in the direction of the arrow in FIG.
Is cut and opened. Next, when the left and right tables 31a and 31b of the mounting table 31 are opened downward as shown in FIG. 1, the powdery material as the content falls and is discharged from the bag, and the container provided below the mounting table 31. Is taken out. After taking out the contents, the left and right tables 31a,
31b is returned to the horizontal position.
5 is pulled out and sent to the carry-out port 12 side by the empty bag discharging means 52 having a U-shaped top as shown in FIG. 6, thereby completing a series of operations for the bag P.

Hereinafter, the configuration of the bag opening apparatus according to the present embodiment will be described in detail. FIG. 2 shows the appearance of the apparatus. The housing 1 supports, for example, a rectangular parallelepiped box-shaped container provided with a carry-in port 11 for bags P and a carry-out port 12 for cut empty bags P at both ends. The structure is supported by the member 13. A duct 14 for maintaining the inside of the housing at a negative pressure and a suction pump 15 for sucking scattered powder are provided on the ceiling of the housing 1.

FIG. 3 is a sectional view showing the inside of the apparatus, and FIG.
Is a plan view of the same. In the plan view of FIG. 4, only the outline of the housing 1 is shown by dotted lines for convenience of explanation. First, a description will be given from the upstream side of the present apparatus shown on the right side of FIG. 3. Reference numeral 21 denotes a conveyor forming a carry-in path. Is provided. The bag supply mechanism 23 includes a vertically movable extruding member 24 for sending the bag P to the downstream side of the apparatus. Although not shown in FIG. 3, as shown in FIG. 4, a bag positioning mechanism 26 having, for example, three bar-shaped members 25 provided on each side of the conveyor 21 is provided in the middle of the conveyor 21. The upper bag P is positioned by being pushed by the bar-like members 25 from both sides.

On the downstream side of the conveyor 21, there is provided a bag mounting table 31 composed of two tables 31a and 31b arranged on the left and right with a gap 30 therebetween. In a horizontal state where the bag P is placed, these two tables 31a,
Reference numerals 31b are spaced apart from each other so as not to be touched by a rotary blade, which will be described later, and the interval is, for example, about 1 cm. These tables 31a and 31b are provided with bag holding means 3 for holding the bag left and right.

The bag holding means 3 includes left and right tables 31
a, 31b, a horizontal shaft provided to extend in the front-rear direction via a support shaft 33 provided at an outer end portion (a left end portion and a right end portion) and a support member 33 at an upper end portion of the lift shaft 32. , And three pressing claws 35 provided before and after the plate 34 at an interval.

The outer edges of each of the tables 31a and 31b are notched at the front and rear ends, and a support member 36 is disposed so as to sandwich the front and rear of the outer edge. A horizontal rotating shaft 37 is provided from the support member 36 to penetrate the outer edge of each of the tables 31a and 31b, and the tables 31a and 31b can be rotated by the rotating shaft 37, that is, the inner ends of the tables 31a and 31b. (The opposing edges 38 facing each other) are configured to be lowered and open downward. Since the bag holding means 3 is provided integrally with the tables 31a and 31b, it rotates together with the tables 31a and 31b. Then, as shown in FIG. 5, the support member 36 once falls down from the portion where the rotating shaft 37 penetrates when viewed from the upstream side of the present apparatus, and further bends outward in the horizontal direction.
It is configured to be guided by the guide rail 39 at the outer end of the bent portion. The guide rail 39 is provided so as to cover a necessary moving area of the mounting table 31.

The center position of the moving area of the mounting table 31 composed of a pair of tables 31a and 31b (each table 31
a, 31b), the mounting table 3
In order to cut the center of the bag P mounted on 1, a rotary blade 4 that is rotated by a horizontal rotating shaft 41 extending left and right is provided, and the rotating shaft 41 does not contact the bag P on the mounting table 31. It is set to the height of about. An arc-shaped cover 42 is provided at a position above the rotary blade 4 so as to cover the blade of the rotary blade 4. A suction tube 43 is connected to the suction pump 15, and a trumpet-shaped suction port 44 formed at the tip of the suction tube 43 is provided near the rotary blade 4.

A rail 51 extending back and forth is provided above the moving area of the bag P on the downstream side of the rotary blade 4, and the rail 51 is suspended and serves to discharge empty bags also serving as holding means. Means 52 are provided. The empty bag discharging means 52 has a flat U-shape so as to be able to press both of the empty bags P cut in the traveling direction left and right as shown in FIG. An extruding member 53 is provided so as to protrude downward at such a height that the empty bag P can be extruded forward and discharged to the carry-out port 12 without contacting the surface.

A carry-out path 54 inclined forward and downward is provided in front of the empty bag discharge means 52, and a stocker 55 for receiving empty bags is provided outside the carry-out port 12 at the downstream end. The stocker 55 can be moved up and down by a telescopic mechanism. On the other hand, empty bag discharging means 5
An opening of the hopper 6 for receiving the powder, which is the contents of the bag, is located below the moving path of the mounting table 31 up to the vicinity of the position where the device 2 is installed. The lower end of the hopper 6 is connected to a stocker 61. A vibrator 62 is installed on the outside of the side wall of the hopper 6 in close contact therewith.

Next, the operation of each step in the present embodiment mentioned at the beginning of this section "Embodiments of the invention" will be described in detail. First, before the bag P is carried into the apparatus, the inside of the housing 1 is evacuated from the duct 14 connected to the motor by a suction force of a motor (not shown), and is maintained at a negative pressure. This suppresses the dust generated at the time of cutting the bag P described later and at the time of discharging the contents from the cut bag P from leaking out of the apparatus. Although not shown, it is possible to enhance the effect of suppressing leakage of dust by providing air curtains at the carry-in port 11 and the carry-out port 12, respectively.

The bag P carried in by the conveyor 21 is
It is pushed out by the bag supply mechanism 23. That is, the bag supply mechanism 23 is lowered to a position where the pushing member 24 can push out the bag P, that is, to a height slightly higher than the conveyor 21, and is guided forward by the rail 22 by the driving force of the driving device (not shown) and moves forward. I do. At this time, conveyor 21
The position is adjusted by the positioning mechanisms 26 provided on the left and right in the middle of the movement path so that the bag P is placed at the center of the placing table 31. The position adjustment is performed by, for example, pushing the moving bag P from the side by the rod-shaped members 25 provided on the left and right sides of the positioning mechanism 26. After the bag P is positioned in this manner, the bag supply mechanism 23
Is pushed out to the mounting table 31. This position where the bag supply mechanism 23 is moved by the guide of the rail 22 is a position where the bag P is pushed out to a substantially central position of the mounting table 31.
The bag supply mechanism 23 in which the bag P is placed at the center of the mounting table 31,
The extruding member 24 is raised, guided by the rails 22 and returned to the original position, in preparation for carrying in the next bag P.

Next, the holding claw 35 descends and pierces the bag P mounted on the mounting table 31, and presses the bag P against the mounting table 31. This prevents the bag P from being separated from the mounting table 31 when the bag P is cut, which will be described later. Also, when the tables 31a and 31b are opened downward after the bag P is cut, the bag P is separated from the tables 31a and 31b. Prevent slipping. Therefore, the load applied to the three pressing claws 35 is set to such a size that the bag P does not move when the bag P is cut or when the mounting table 31 rotates.

Next, the mounting table 31 is guided by the guide rail 39 and moves forward, and the rotary blade 4 provided on the course of the mounting table 31 relatively approaches the mounting table 31. As described above, since the blade of the rotary blade 4 and the center of the gap 30 between the mounting tables 31 are located on the same line, the rotary blade 4 passes through the gap 30 while cutting the bag P on the mounting table 31. Then, the cutting of the bag P is completed.

After the cutting of the bag P is completed, the tables 31a, 31
The rotating shaft 37 is rotated by, for example, the driving force of a motor (not shown) so that the cut surface of each of the bags P on b faces downward. As a result, the content powder falls from the bag P, passes through the opening of the hopper 6, and is taken out to the stocker 61 arranged below. And the rotating shaft 37 is
For example, the tables 31a and 31b are rotated so that the facing edges 38 of the tables 31a and 31b are repeatedly lowered and leveled several times. As a result, the contents stored in the bag P can be almost completely discharged by the centrifugal force and vibration during rotation. On the other hand, at this time, the vibrator 6
The entire contents of the bag P attached to the inner wall surface of the hopper 6 are dropped to the stocker 61 by vibrating the entire hopper by using 2, so that the contents of the bag P are more reliably taken out to the stocker 61.

The opening of the hopper 6 is large enough to cover the lower side of each of the position of the rotary blade 4 and the position where the mounting table 31 passes through the rotary blade 4 and rotates the rotary shaft 37. , The contents spilled out of the gap 30 between the table 31a and the table 31b when the rotary blade 4 cuts the bag P, and the bag P is rotated by the rotating shaft 37 a plurality of times. Since the discharged contents are completely received and the contents are prevented from adhering to the hopper 6 due to the vibration of the vibrator 62, the bag P
Is almost exactly transferred to the stocker 61.

When the bag P is cut by the rotary blade 4, dust generated when the bag P is cut is sucked from the suction port 44 provided near the rotary blade 4 by the suction force of the suction pump 15. The scattering of dust into the interior of the housing 1 and the adhesion of dust to components in the housing 1 are suppressed, and the maintenance efficiency of the components in the housing 1 is improved. Note that the dust sucked in here is extremely small, so
It does not affect the weighing of the contents transferred to 1. further,
The cover 42, which covers the upper part of the rotary blade 4 in an arc shape, also suppresses the scattering of dust into the inside of the housing 1 and repels the contents downward, thereby improving the maintainability and ensuring the removal of the contents from the bag P. Plays a role of enhancing.

After the series of operations for removing the contents from the bag P described above are completed, the tables 31a, 31
b is returned to the initial horizontal position, and the mounting table 31 is guided by the guide rail 39 to the downstream end of the apparatus with the empty bag P mounted. Here, the empty bag discharging means 52 suspended in a flat U-shape suspended on the rail 51 is pressed down to hold the empty bag P, and the bag holding portion 3 is held in a state where the empty bag discharging means 52 holds the bag P. Rises, and the holding claw 35 is pulled out of the bag P.

Then, with the mounting table 31 stopped, the empty bag discharging means 52 moves forward along the rail 51, and the empty bags P cut left and right are sent out to the carry-out path 54. The carry-out path 54 is inclined forward and downward, and the bags P sent out along the inclined surface are stacked on an empty bag stocker 55 provided outside the carry-out port 12.

As described above, in the above-described embodiment, the cutting of the bag P, the taking out of the powdery material as contents into another container, and the carrying out of the empty bag can be automatically and continuously performed. Efficiency can be increased, and adverse effects of dust on workers can be avoided.

Further, the bag is held down by the holding claws 35, so that the bag is held not by a surface but by a point.
a, 31b is opened downward to take out the powder,
The contents can be reliably taken out. Furthermore, since the apparatus is housed in the housing 1 and the dust generated when the bag P is opened is suppressed from leaking to the outside, it is possible to suppress the adverse effects of dust to the surroundings.

In the above description, the bag holding means is not limited to the holding claw, and suction holes are formed in the tables 31a and 31b.
The bag may be sucked from the suction holes to be sucked to the tables 31a and 31b. Tables 31a, 3
1b, holes are formed at positions where the holding claws 35 press down on the respective surfaces in such a manner that the holding claws 35 pass therethrough in accordance with the respective holding claws 35, and after the holding claws 35 pierce the bag P, the table 31a May be configured to enter the holes.

Further, the cutting blade is not limited to the rotary blade 4,
For example, a vertical blade that moves up and down may be used. here,
In order to prevent the cut material of the bag P from being mixed with the contents when cutting the bag P and taking out the contents, the rotary blades 4 and the like are knife-shaped instead of saw blades.

[0030]

According to the apparatus of the present invention, it is possible to automate the opening operation of the bag containing the granular material, and at the same time, to take out the contents reliably.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a process from when a bag P is mounted on a mounting table until its contents are discharged.

FIG. 2 is a perspective view showing an appearance of the apparatus main body.

FIG. 3 is a sectional view of the device according to the embodiment of the present invention.

FIG. 4 is a plan view of the device according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a state in which contents are discharged from a bag cut by a rotary blade.

FIG. 6 is an explanatory diagram illustrating a step of discharging an empty bag from the inside of the apparatus housing to the outside.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 11 Carry-in port 12 Carry-out port 14 Duct 15 Suction pump 21 Conveyor 22 Rail 23 Bag supply mechanism 24 Extrusion member 25 Bar-shaped member 26 Positioning mechanism 3 Bag fixing part 30 Gap 31a Table 31b Table 31 Mounting table 33 Support member 34 Plate 35 Pressing pawl 36 Rotating shaft 37 Support member 38 Opposing edge 39 Guide rail 4 Rotating blade 41 Rotating shaft 42 Cover 44 Suction port 51 Rail 52 Empty bag discharging means 53 Pushing member 54 Unloading path 55 Stocker 6 Hopper 61 Stocker 62 Vibrator

Claims (3)

[Claims] 1. A bag opening device for opening a bag containing powdery or granular materials, comprising: a pair of tables arranged on the left and right sides with a gap therebetween, on which the bag is placed across the gap. Bag holding means respectively provided on a pair of tables for holding bags mounted on the mounting table, and the bag holding means while relatively moving with respect to the mounting table along the gap. A cutting blade that cuts the bag on the mounting table pressed by the cutting table, and a rotating unit that rotates the table between a horizontal position and a posture in which a facing edge on a side where the pair of tables face each other is lowered. A bag opening apparatus characterized in that, when the opposing edge of the table is lowered, the granular material falls and is discharged from the bag while the cut bag is pressed against the table. 2. The cutting blade according to claim 1, wherein the cutting blade rotates about a horizontal axis positioned above the bag on the mounting table and moves back and forth relative to the mounting table. Bag opening device. 3. The bag holding means has a plurality of pressing claws arranged in front and rear, which stabs and presses the bag.
The bag opening device according to the above.