JPH0714724B2 - Flexible container bag opening machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flexible container bag opening machine,
More specifically, a flexible bag body is filled with powder such as cement, talc, calcium carbonate, bentonite, etc. and transported to a remote place, which is suitable for use when opening the bag locally. The present invention relates to a container bag opening machine.

[Conventional technology]

It has been conventionally performed to fill powders such as cement and talc into a flexible container bag (hereinafter, referred to as a flexible container bag) having a so-called flexibility such as various resin bags and to transport it to a remote place. ing.

The advantage of the flexible container bag is that it is a disposable type, and therefore, it is very easy to dispose of the container after taking out the powder without bulking it after opening the bag at the transportation site.

[Problems to be Solved by the Invention]

However, in the past, the actual bag opening work for taking out powder such as cement from the flexible container bag has not been performed in a closed space. Therefore, if the bag opening work is carried out for a long period of time, the lungs will be sucked by dust. There is a problem that not only the occupational disease of so-called pneumoconiosis, which causes a decrease in cardiorespiratory function, may occur due to the change of fiber proliferation in the tissues of the above-mentioned tissues, but also the surrounding environment may be polluted to cause dust pollution. .

The present invention has been made in consideration of the above points,
The purpose is to open the flexible container bag which is very easy to dispose after taking out the powder because it is flexible because it has flexibility, that is, the powder such as cement is removed from the flexible container bag. Even if you are involved in this kind of work for a long time when you take out the bag, you do not have to worry about pneumoconiosis diseases, and at the same time solve the problem of polluting the surrounding environment and causing dust pollution, so that a clean working environment It is to provide a flexible container bag opening machine that can secure

[Means for Solving the Problems]

The above-mentioned object is a bag opening machine casing having a closed structure excluding an upper opening, and the flexible container attached to the upper opening of the bag opening machine casing and accompanying the downward movement of the flexible container bag set above the flexible container. A stretchable canvas shutter that expands in close contact with the side surface of the bag, a blower that creates a negative pressure inside the bag opening machine casing, and is located inside the bag opening machine casing and descends from the canvas shutter direction. A table on which the flexible container bag is placed, a cutter that cuts the flexible container bag temporarily placed on the table with a joint margin on its peripheral wall, and a powder that falls from the flexible container bag due to the cutting action of the cutter outside the system. It is achieved by providing a feeder for transferring to.

[Action]

According to the present invention having the above structure, the flexible container bag to be opened is lifted by an appropriate means such as a crane or a hoist before opening the flexible container bag filled with the powder such as cement. And passes through the upper part of the bag opening machine casing, more specifically, the canvas shutter attached to the upper opening of the bag opening machine casing.

As the flexible container bag descends, the expandable canvas shutter expands in close contact with the side surface of the flexible container bag, and the flexible container bag is placed on the table in the casing of the bag opening machine.

When the flexible container bag is temporarily placed on the table, the cutter operates and the peripheral wall of the flexible container bag placed on the table is cut with a joint margin.

On the other hand, due to the cutting action of the cutter, the filler such as cement dropped from the flexible container bag is transferred to the outside of the predetermined system by the feeder, and according to the present invention, all the bag opening work of the flexible container bag is performed. , The canvas shutter attached to the bag opening machine casing and the upper opening thereof, that is, a closed space between the expandable and contractible canvas shutters that is expanded in close contact with the side surface of the flexible container bag when the flexible container bag is lowered.

〔Example〕

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to an embodiment of the drawings. FIG. 1 is an overall configuration explanatory view of a flexible container bag opening machine according to the present invention, and FIGS. 2 (a) to (e) are FIG. FIG. 7 is an operation explanatory view of the bag opening machine shown in FIG.

In FIG. 1 showing the overall configuration of the flexible container bag opening machine, reference numeral 1 denotes a bag opening machine casing having a closed structure except for an upper opening, and the bag opening machine casing 1 includes a main body casing 1a and an upper casing 1b. It is configured.

Reference numeral 2 denotes a flexible container inner guide provided at the upper end opening of the upper casing 1b. A flexible container bag (indicated by reference numeral 30 in FIG. 2) filled with powder such as cement is placed through the inner guide 2 through the inner guide 2. And is guided into the bag opening machine casing 1.

Reference numeral 3 denotes a canvas shutter which is located directly below the flexible container inner guide 2 and attached. The canvas shutter 3 is configured as follows.

That is, 3a indicates a steel ring that constitutes the outer frame of the canvas shutter 3, and 3b indicates an elastic rubber ring that constitutes the inner frame of the canvas shutter 3, and between the steel ring 3a and the rubber ring 3b. At this position, for example, a polyester resin sheet 3c is stretched.

Thus, the opening size of the central portion of the canvas shutter 3 (reference numeral D _{1 in} FIG. ₁ ), that is, the opening inner diameter D ₁ of the elastic rubber ring 3b is, for example, a flexible container bag.
The diameter is 30 to 50% (indicated by D ₂ in FIG. 2B) within a range of 50 to 110%, and in the free state,
As shown in FIG. 2 (a), the minimum diameter of 50% is maintained.

Therefore, as the flexible container bag 30 descends, the expandable canvas shutter 3 expands in close contact with the side surface of the flexible container bag 30 as shown in FIG. It is placed on the table 4 in the bag opening machine casing 1.

Reference numeral 5 denotes a flexible container bag sensing bar provided at the center of the table 4.

In the illustrated embodiment, the table 4 is moved by the operation of the link mechanism 8 connected to the air cylinder 7.
As shown by the chain line in FIG. 1 and the solid line in FIG. 2 (d),
It is composed of two butterfly table members 4a and 4b which tilt downward with respect to the central axis 9.

On the other hand, in FIG. 1, the pair of left and right cutter mounting units 6 to which the cutters 6a are attached are urged forward, that is, toward the center of the bag opening machine casing 1, by springs 10 provided at their backs.

In addition, at the upper tip of the cutter mounting member 6, the roller 11
This roller 11 is in contact with the cam surface of the plate cam 12 fixed to the outer periphery of the inner case 1b- ₁ of the upper casing 1b.

Further, the lower bottom of the base member 14 which fixes one end of the spring 10 and mounts the cutter mounting member 6 via the wheel 13 is fixed to the upper surface of the swivel ring 15. Is rotated in the circumferential direction by driving the motor 16.

That is, when the bag opening machine is stopped, the roller 11 attached to the upper end of the cutter mounting unit 6 is a plate cam.
The cutter 6a rides on twelve convex portions (not shown) and retracts to a predetermined position.

On the other hand, when the flexible container bag 30 is placed on the table 4 as shown in FIG. 2 (b) and the peripheral wall of the flexible container bag 30 is cut by the cutter 6a as shown in FIG. 2 (c). The drive of the motor 16 causes the swivel ring 15, and hence the cutter mounting unit 6 mounted on the swivel ring 15 via the base member 14, to start to rotate in the circumferential direction, and at the same time, hit the plate cam 12. The roller 11 in contact with the plate cam 12 gradually descends from the convex portion of the plate cam 12 on which it has been riding until it finally moves in the circumferential direction on a flat curved cam surface. When gradually descending from the convex portion of 12, the cutter 6a is given a movement in the forward direction together with a movement in the circumferential direction, that is, a movement in the direction toward the center of the bag opening machine casing 1, and by this movement in the forward direction, Shown in Figure 2 (c) As described above, the tip of the cutter 6a will pierce the peripheral wall of the flexible container bag 30, and thereafter, by the movement of the cutter 6a in the peripheral direction, the peripheral wall of the flexible container bag 30 corresponds to the moving distance in the peripheral direction of the cutter 6a. The predetermined length is cut.

Then, when a predetermined length of the flexible container bag 30 is cut by the cutter 6a, the roller 11 rides on the convex portion of the plate cam 12 again, and at this time, therefore, the cutter 6a moves in the backward direction together with the movement in the circumferential direction, That is, a motion in the direction opposite to the center of the bag opening machine casing 1 is imparted, and the cutter 6a does not come into contact with the peripheral wall of the flexible container bag 30 when the cutter 6a moves forward and backward, so that the flexible container bag 30 A joint margin is partially left on the peripheral wall of the container, and as a result, the cut pieces of the flexible container bag 30 can be prevented from being mixed into the discharged powder.

17 is a level switch for detecting the presence or absence of powder discharged from the flexible container bag 30 into the main casing 1a, 18 is a screw feeder for transferring the powder dropped from the flexible container bag 30 into the main casing 1a to the outside of the system, 19 is A dust collecting duct, one end of which faces the main body casing 1a and the other end of which is connected to the dust collecting box 20, 22 is a rotary valve provided in the middle of a pipe line 21 connecting the dust collecting box 20 and the screw feeder 18. , 23 is a back filter adjacent to the dust collection box 20, and 24 is a turbo blower attached to the back filter 23.

Further, LS1 is a limit switch for detecting the retracted state of the cutter 6a, and LS2 is a limit switch for detecting the presence or absence of the flexible container bag 30 in the sensing bar 5 portion provided at the center of the table 4, and this limit switch is used.
The LS2 operates by placing the flexible container bag 30 on the sensing bar 5.

That is, when the flexible container bag 30 is placed on the sensing bar 5, the sensing bar 5 is configured to slightly descend against the compression spring 25 provided thereunder, and at this time, the limit switch. The LS2 operates to detect the presence of the flexible container bag 30 on the sensing bar 5.

LS3 is a limit switch for detecting the closed state of the butterfly table members 4a and 4b, and LS4 is a limit switch for detecting the open state of the butterfly table members 4a and 4b in conjunction with a link mechanism 8 connected to the flexible container back sensing bar 7. Is.

In FIG. 1, reference numeral 26 denotes a top cover of the bag opening machine. This top cover 26 is used when the bag opening machine is not in use.
Covers the opening of the flexible container bag inner guide 2 provided on the upper part of the.

Further, 27 is a compressed air supply source for the air cylinder 7, and 28 is a compressed air supply valve provided in the middle of a pipe line 29 connecting the compressed air supply source 27 and the air cylinder 7.

Next, the operation of the flexible container bag opening machine having the above structure will be described. First, the capacity of the screw feeder 18 is set in accordance with the capacity of the external transport machine.

Then, the compressed air supply valve 28 of the air cylinder 7 is fully opened to check whether the predetermined pressure is reached.

Then, the top cover 26 is removed so that the flexible container bag 30 can be loaded into the bag opening machine.

Further, the screw feeder 18 and the dust collecting system turbo blower 24 are sequentially activated.

An indicator lamp (not shown) that allows the flexible container bag 30 to be turned on is turned on when all the following conditions are satisfied.

That is, (1) Detection of the ON state of all the screw feeder 18, the dust collecting system rotary valve 22, and the turbo blower 24 described above.

(2) Detecting the retracted state of the cutter 6a. That is, the ON state of the limit switch LS1 is detected.

(3) No detection of the flexible container bag 30 on the table 4 part. That is, the OFF state of limit switch LS2 is detected.

(4) Detection of the closed state of the butterfly tables 4a and 4b. That is, limit switch LS3 ON state detection, and limit switch LS4 OFF state detection.

(5) No detection of powder in the bag opening machine casing 1. That is, the off state of the level switch 17 is detected.

On the other hand, the indicator lamp (not shown) that makes it impossible to put the flexible container bag 30 under the conditions reverse to those of (1) to (5) above.
Lights when one is satisfied.

That is, (1) detection of any one of the screw feeder 18, the dust collecting system rotary valve 22, and the turbo blower 24 in the off state.

(2) No detection of the retracted state of the cutter 6a. That is, the OFF state of limit switch LS1 is detected.

(3) Detection of the flexible container bag 30 on the table 4 part. That is, the ON state of the limit switch LS2 is detected.

(4) Detection of the closed state of the butterfly tables 4a and 4b. That is, limit switch LS3 OFF state detection, and limit switch LS4 ON state detection.

(5) Detection of powder in the bag opening machine casing 1. That is, the ON state of the level switch 17 is detected.

Then, if it is confirmed that the indicator lamp that enables the insertion of the flexible container bag 30 is turned on, the worker lifts the flexible container bag 30 to be opened by an appropriate means such as a crane or a hoist. Then, the flexible container bag 30 passes through the canvas shutter 3 via the inner guide 2.

Incidentally, in consideration of the case where the diameter of the flexible container bag 30 is extremely small, an inner guide case for a small diameter may be prepared in advance and set in the inner guide 2.

As described above, the canvas shutter 3 that has passed the flexible container bag 30 expands in a state of being in close contact with the side surface of the flexible container bag 30, while the flexible shutter bag 30 passes through the canvas shutter 3 and the flexible container bag 30 is centered on the table 4. It is placed on the upper part of the bag sensing bar 5 provided in the section, and the fact that the flexible container bag 30 is placed on the upper part of the sensing bar 5 is provided below the sensing bar 5. The sensing bar 5 is slightly lowered against the compression spring 25, and the limit switch LS2 is actuated to detect it.

At this time, the inside of the bag opening casing 1 is maintained at a negative pressure by the turbo blower 24.

By the way, the flexible container bag 30 is replaced with the bag sensing bar 50.
It is convenient to collect the FIBC bag 30 that has become an empty bag after opening the bag if the hanging tool that suspends the upper part of the FIBC bag 30 is not removed even after the above setting.

Further, as shown in the illustrated embodiment, if the side surface shape of the bag sensing bar 5 is a delta shape having an acute angle portion at the upper side, the flexible container bag 30 placed on the sensing bar 5 can be easily eaten. , The mounting state can be made stable.

As described above, when the limit switch LS2 detects the flexible container bag 30, next, the peripheral wall of the flexible container bag 30 is cut by the cutter 6a.

That is, as shown in FIG. 2 (b), the flexible container bag 30 is placed on the table 4, and as shown in FIG. 2 (c), when the peripheral wall of the flexible container bag 30 is cut by the cutter 6a, By the drive of the motor 16, the swivel ring 15, and by extension, the cutter mounting unit 6 mounted on the swivel ring 15 via the base member 14 starts to rotate in the circumferential direction, and at the same time, comes into contact with the plate cam 12. The roller 11 is gradually lowered from the convex portion of the plate cam 12 on which it has been riding until it finally moves in the circumferential direction on a flat curved cam surface. When the cutter 6a is gradually lowered from the convex portion, the cutter 6a is given a movement in the forward direction along with a movement in the circumferential direction, that is, a movement in the direction toward the center of the bag opening machine casing 1, and the movement in the forward direction causes the second movement. Shown in Figure (c) As described above, the tip of the cutter 6a breaks through the peripheral wall of the flexible container bag 30, and then the peripheral wall of the flexible container bag 30 is moved in the peripheral direction of the cutter 6a according to the moving distance of the cutter 6a in the peripheral direction. A predetermined length is cut.

Then, when a predetermined length of the flexible container bag 30 is cut by the cutter 6a, the roller 11 rides on the convex portion of the plate cam 12 again, and at this time, therefore, the cutter 6a moves in the backward direction together with the movement in the circumferential direction, That is, a motion in the direction opposite to the center of the bag opening machine casing 1 is imparted, and the cutter 6a does not come into contact with the peripheral wall of the flexible container bag 30 when the cutter 6a moves forward and backward, so that the flexible container bag 30 A joint margin is partially left on the peripheral wall of, and as a result, the cut pieces of the flexible container bag 30 can be prevented from being mixed into the discharged powder.

As mentioned above, the flexible container bag sensing bar 5
If the side surface shape of the delta shape is a delta shape having an acute angle portion on the upper side, the flexible container bag 30 placed on the sensing bar 5 can be eaten well and the placed state can be made stable. In addition, even when the flexible container bag 30 receives the rotational force of the cutter 6a during the bag opening operation, the flexible container bag 30 does not move unintentionally due to the above-mentioned biting action, and the cutter 6a can perform the cutting work stably. be able to.

In addition, as shown in the illustrated embodiment, when a plurality of cutters 6a (two left and right in the illustrated embodiment) are provided,
Each of the plurality of cutters 6a is of a double-edged type, and the movement of the plurality of cutters 6a is a repetitive movement type (when a pair of left and right cutters 6a is provided as shown in the illustrated embodiment, about 180 degrees Repetitive motion formula)
It is possible to open one flexible container bag 30 and to open the next flexible container bag 30 in the subsequent returning operation, and it is possible to shorten the bag opening time compared to the case where there is only one cutter 6a. It has excellent workability.

Furthermore, if several types of cutters 6a with different lengths are prepared in advance and the cutters 6a of appropriate length are selectively used, even a single bag opening machine can produce flexible container bags of different sizes.
Even when dealing with 30, it is possible to cope with this sufficiently.

Furthermore, if it is necessary to change the seam allowance when cutting the bag due to the difference in the material of the flexible container bag 30, prepare a plate cam 12 corresponding to multiple kinds of seam allowances in advance. Good.

Then, the cutting of the flexible container bag 30 by the cutter 6a is completed, and the pulling of this cutter 6a is limited by the limit switch LS1.
Is detected, the link mechanism 8 causes the two butterfly table members 4a and 4b to tilt downward with respect to the central axis 9 as shown by the chain line in FIG. 1 and the solid line in FIG. 2 (d). To do.

At the same time, the cut portion of the flexible container bag 30 is opened gently, and the discharge of the powder filling the flexible container bag 30 is started.

Then, as the discharge of the powder progresses, the flexible container bag
Although 30 loses the filling and starts shrinking, the inner diameter of the canvas shutter 3 also becomes smaller following this, and at this time, since the inside of the bag opening machine casing 1 is maintained at a negative pressure by the turbo blower 24, It is possible to effectively prevent dust generation outside the bag opening machine.

As shown in the illustrated embodiment, when the table 4 is composed of two butterfly table members 4a and 4b tilting downward, the butterfly table members 4a and 4a
The shoot action of 4b can prevent the free fall phenomenon of the powder and reduce dust generation inside the machine.

Further, by adjusting the tilting angles of the butterfly table members 4a and 4b, the amount of powder discharged from the flexible container bag 30 per unit time can be adjusted, and the larger the tilting angle is (that is, , The closer the tilting angles of the butterfly table members 4a and 4b are to the horizontal state, the more the amount of powder discharged from the flexible container bag 30 per unit time can be reduced, and this also reduces dust inside the machine. It is effective.

Furthermore, as shown in the illustrated embodiment, if the side surface shape of the flexible container bag sensing bar 5 is a delta shape having an acute angle portion at the upper side, the flexible container bag 30 placed on the sensing bar 5 can be easily fed. , It is possible to make the placement state stable, and at the time of bag opening operation,
Even if the flexible container bag 30 receives the rotational force from the cutter 6a, the flexible container bag 30 does not move unintentionally due to the above-mentioned biting action, and the cutting operation by the cutter 6a can be stably performed. When the powder is completely discharged from the bag 30, the remaining amount of the powder in the bag 30 can be reduced as much as possible.

Then, the powder discharged from the flexible container bag 30 is quickly transferred to the outside of the system by the screw feeder 18 placed below the butterfly table members 4a and 4b. Due to the suction action of the turbo blower 24, the suspended dust in 1 is collected in the dust collection box 20 via the dust collection duct 19, and is passed to the screw feeder 18 side via the rotary valve 22 provided in the middle of the pipeline 21. To be collected,
When the level switch 17 operates, the air cylinder 7 operates to close the butterfly table members 4a and 4b, and the limit switch LS3 detects this state and prepares for loading the next flexible container bag 30.

〔The invention's effect〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, all the bag opening work of the flexible container bag is performed by the bag opener casing and the canvas attached to the upper opening thereof. It is performed in the closed space between the shutters, that is, the stretchable canvas shutters that expand in close contact with the side surface of the flexible container bag when the flexible container bag descends.

Therefore, according to the present invention, since the flexible container is not bulky after opening the bag because it has flexibility, it is very easy to dispose of the powder after the powder is taken out, that is, the flexible container bag is opened. When opening the bag to remove
Even if you are involved in this kind of work for a long time, there is no risk of pneumoconiosis, and at the same time you can solve the problem of polluting the surrounding environment and generating dust pollution, and secure a clean working environment. A flexible container bag opening machine can be provided.

[Brief description of drawings]

The drawings show one embodiment of the flexible container bag opening machine according to the present invention, and FIG.
(A)-(e) is operation | movement explanatory drawing of the bag opening machine shown in FIG. 1 …… Bag opening machine casing, 3 …… Canvas shutter, 4 …… Table, 6 …… Cutter mounting unit, 6a
…… Cutter, 18 …… Screw feeder, 30 …… Flexible container bag.

Claims (1)

[Claims] 1. A bag opening machine casing having a closed structure excluding an upper opening, and a lowering operation of a flexible container bag attached to the upper opening of the bag opening machine casing and set on the upper opening thereof. A stretchable canvas shutter that expands in close contact with the side surface of the container bag, a blower that creates a negative pressure inside the bag opening machine casing, and is located inside the bag opening machine casing and descends from the canvas shutter direction. A table on which the incoming flexible container bag is placed, a cutter that cuts the flexible container bag temporarily placed on the table with a joint margin on its peripheral wall, and drops from the flexible container bag by the cutting action of the cutter. It is equipped with a feeder for transferring the powder out of the system. Flexible container bag bag opening machine according to.