JP6360433B2 - Flexible container discharge device - Google Patents

Description

  The present invention relates to a flexible container bag discharging device that can automatically discharge powder filled in a flexible container bag while preventing manual dust generation during discharging.

  When discharging the powder filled in the flexible bag, which is a flexible bag, the operator hangs the flexible container bag with a hoist, etc., and gradually lifts the powder so that the powder is smoothly discharged from the lower outlet. And it is made to fall to a receiving container (for example, refer patent document 1).

JP 2004-174339 A (FIG. 3)

The powder discharge of this conventional flexible container bag has the following desired improvements.
(1) When the powder is discharged, the flexible flexible container bag is deformed according to the discharge of the powder, and the powder is difficult to be discharged. The worker needs to gradually pull up the flexible container bag so that the discharge is smooth. Therefore, it is impossible to leave the place until the entire amount is discharged.
(2) Dust is easily generated when the powder is discharged. Dust collection cannot be completely prevented.

  The present invention has been made in view of the above-mentioned facts, and its technical problem is that when discharging powder from the outlet of a suspended flexible container bag, the flexible container bag is gradually discharged until the total amount is discharged in order to smoothly discharge the powder. It is an object of the present invention to provide a flexible container bag discharging device that improves the problem of manpower that an operator needs to pull up and cannot leave the place, and prevents the generation of dust during discharging.

According to the present invention, as a flexible container bag discharging device that solves the above technical problem, a flexible container bag that is a flexible bag body that is filled with powder and is suspended by an elevating means with the discharge port at the bottom positioned downward is provided at the bottom. Installed below the bag cradle, which supports the periphery and places the bag cradle, detection means for detecting the suspended weight including the powder of the flexible container bag, and guides the powder from the discharge port to the discharge destination Connecting means for connecting the cylindrical member, the upper end portion of the cylindrical member and the discharge port of the flexible container bag placed in a sealed state in a separable manner, and opening and closing of the discharge of powder to the discharge destination installed in the cylindrical member And a control means for intermittently controlling the “raising allowance” that is the amount by which the flexible container bag is lifted by the lifting means based on the detected suspension weight,
Powder discharge is
The outlet of the flexible container bag placed on the bag cradle and the cylindrical member with the on-off valve closed are connected by connecting means, and the flexible container bag is raised by the lifting means until it is separated from the bag cradle, and this lifting position is maintained. To discharge the powder to the cylinder member, open the on-off valve and start,
The control means
Following this `` start discharge '', the flexible container bag is pulled up by the lifting and lowering means, and the lifting position is set in advance every time the lifting weight until `` total discharge '' reaches a preset weight divided into a plurality of stages. There is provided a flexible container bag discharging device characterized in that it is raised by "raising allowance", maintained in this lifting position until the next weight loss is reached, and this control is repeated until "full discharging".

  Preferably, the connecting means includes a disk portion formed in a size so that the periphery of the upper end of the tubular member covers the discharge port of the flexible container bag, and a discharge port covered with the disk portion via an annular seal. A plurality of cylinders attached to a cylindrical member pressed by an annular member.

  In addition, the “raising allowance” is set to be gradually increased from “discharge start” to “total discharge”.

  The “powder” in the present invention includes various properties such as granular, fine, lump, and strip.

  A flexible container bag discharging apparatus constructed in accordance with the present invention comprises a bag cradle for supporting a flexible container bag suspended by an elevating means, a detecting means for detecting a suspended weight including powder of the flexible container bag, and powder from a discharge port. A cylindrical member that guides the body to the discharge destination, a connecting means that connects the upper end of the cylindrical member and the discharge port in a separable manner, and opening and closing the discharge of powder to the discharge destination installed in the cylindrical member And a control means for intermittently controlling the “lifting amount” that is the amount by which the flexible container bag is lifted by the lifting means based on the detected suspension weight.

  And, when discharging the powder from the outlet of the suspended flexible container bag, until the total amount of the flexible container bag is discharged, the "lifting allowance" is intermittently controlled based on the suspended weight and gradually pulled up by the control means, The flexible container bag always has an appropriate tension, and it is easy to discharge the powder. Further, when discharging the powder, the outlet of the flexible container bag and the cylindrical member for guiding the powder to the discharge destination are connected in a sealed state by a connecting means.

  Therefore, when discharging the powder in the flexible container bag, the operator does not need to gradually raise the flexible container bag in order to discharge smoothly, and once set, the worker can leave the place until the whole amount is discharged. No need for manpower. Further, at the time of discharge, the discharge port and the cylindrical member are connected in a sealed state, so that generation of dust can be prevented.

The structure explanatory view of the flexible container bag discharge device constituted according to the present invention. Explanatory drawing of the connection means shown in FIG. (A) Unconnected state, (b) Connected state. The control diagram of the relationship between hanging weight and raising amount. Explanatory drawing of powder "start of discharge". Explanatory drawing of powder discharge work. The perspective view of a typical flexible container bag.

  Hereinafter, a flexible container bag discharging apparatus constructed in accordance with the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.

  First, a flexible container bag, which is a typical flexible bag body, will be described with reference to FIG. The flexible container bag denoted by reference numeral 2 includes a cylindrical powder inlet 2b at the top of a cylindrical main body 2a and a cylindrical outlet 2c at the bottom. The inlet 2b is provided with an inlet tie string 2d, and the outlet 2c is provided with an outlet tie string 2e. 2 g of presser cloths with ties to be pressed are provided.

  The flexible container bag 2 is formed of an appropriate material such as cloth, synthetic rubber, or resin depending on the type and properties of the powder to be accommodated. At the upper part of the main body 2a, two hanging ropes 2h for hanging the flexible container bag 2 are provided.

  The flexible container bag discharging apparatus will be described with reference to FIG. The flexible container bag discharging device 4 is a bag receiver for placing the flexible container bag 2 filled with the powder P and suspended by a hoist 6 as an elevating means with the bottom discharge port 2c downward and supporting the peripheral edge of the bottom portion. Below the bag cradle 8 that guides the pedestal 8, the load cell 9 that is a detecting means for detecting the suspended weight including the powder of the flexible container bag 2, and the powder P from the discharge port 2c to the hopper 10 that is the discharge destination. The connecting member 14 that connects the installed cylindrical member 12, the upper end of the cylindrical member 12 and the discharge port 2 c of the flexible container bag 2 placed in a separable manner, and the discharge destination installed in the cylindrical member 12. And a control means 16 for intermittently controlling the “lifting allowance”, which is the amount by which the flexible container bag 2 is lifted by the hoist 6, based on the butterfly valve 22, which is a powder on-off valve to 10, and the detected suspension weight. prepare for That.

  The flexible container bag 2 filled with the powder P is hung on the hanging bracket 7 of the hoist 6 with the hanging rope 2h and is suspended and placed on the bag receiving base 8. The load cell 9 is well known, and is attached between the hook of the hoist 6 and the hanging bracket 7.

  The bag receiving base 8 is formed by welding a steel member such as a round steel pipe or a round steel bar, and has an annular receiving portion 8a for placing the peripheral edge of the bottom portion of the flexible container bag 2, and the receiving portion 8a on the lower hopper 10. A plurality of support columns 8b to be attached to the vehicle.

  The cylindrical member 12 is formed in a cylindrical shape by welding a steel pipe or a steel plate, and includes a cylindrical main body 12a protruding upward from a hopper 10 positioned below, and a small diameter cylindrical portion 12b positioned at the upper end of the main body 12a. Further, a disc portion 12c welded to the periphery of the upper end of the cylindrical portion 12b and 12d attached to a connecting portion between the main body 12a and the cylindrical portion 12b, which constitute a part of the connecting means 14, are provided.

  The butterfly valve 22 is disposed at the lower end of the main body 12a of the cylindrical member 12, and the flexible container bag 2 is cleaned by discharging the powder P between the butterfly valve 22 and the small-diameter cylindrical portion 12b. An air connection port 18 with an automatic valve for supplying air and a dust collection port 20 with an automatic valve connected to a dust collector are provided.

  The butterfly valve 22 is a known on-off valve and is opened and closed by a pneumatic cylinder.

  The connecting means 14 will be described with reference to FIG. 2 together with FIG. The connecting means 14 is configured to press the disc portion 12c and the discharge port 2c of the flexible container bag 2 covered on the disc portion 12c via the annular seal 14a so as to be contacted and separated by the annular member 15. The number of cylinders 14b (three in the embodiment) is provided.

  The cylinder 14 b is a double-acting pneumatic cylinder that is attached in a vertical direction on a flat plate portion 12 d provided on the cylindrical member 12, and a rod positioned upward is connected to the annular member 15.

  The annular member 15 is formed by welding steel, and an outer annular portion 15a to which the tip of the rod of the cylinder 14b is connected, an inner annular portion 15b that presses the annular seal 14a and the discharge port 2c, and an outer annular portion 15a. And the connection part 15c which connects the inner side annular part 15b radially at three places of the circumferential direction is provided. The outer annular portion 15a need not be annular because the tip of the rod of the cylinder 14b may be connected to the inner annular portion 15b by the connecting portion 15c.

  The seal 14a is formed of an elastic synthetic rubber having a square cross section having substantially the same outer diameter as that of the disc portion 12c.

The unconnected state and the connected state of the connecting means 14 will be described.
(1) Unconnected state (FIG. 2 (a)):
The rod of the cylinder 14b is extended, and the space between the disc portion 12c and the seal 14a and the annular member 15 inner annular portion 15b is opened, and the discharge port 2c is passed through this portion to cover the portion of the disc portion 12c and the seal 14a. State.
(2) Connection state (FIG. 2 (c)):
A state in which the rod of the cylinder 14b in an unconnected state is contracted and the discharge port 2c is pressed and held by the annular member 15 against the seal 14a of the disc portion 12c.

  The control means 16 will be described with reference to FIG. 3 together with FIG.

  The discharge operation will be described in detail later. The discharge of the powder P from the flexible container bag 2 is performed by connecting the discharge port 2c of the flexible container bag 2 placed on the bag receiving base 8 and the cylindrical member 12 with the butterfly valve 22 closed. 14, the flexible container bag 2 is raised by the hoist 6 until it is separated from the bag cradle 8, the powder P is discharged to the tubular member 12 while maintaining this lifted position, and the butterfly valve 22 is opened to start. The control means 16 controls the “lifting amount” that is the amount by which the flexible container bag 2 is pulled up.

  The control means 16 is a sequence controller that controls the “lifting cost” of the flexible container bag 2 by the hoist 6 based on the detected suspended weight, has a PLC (programmable logic controller), and is provided in the operating device of the hoist 6. It has been.

  A description will be given mainly with reference to FIG. The control means 16 has a plurality of stages from W1 when the lifting weight W of the hoist 6 is “starting discharge” to W6 of “all discharge” following “starting discharge” when the flexible container bag 2 is pulled up by H1 (in the embodiment, five stages). ) Each time reaching the preset weights W2, W3, W4, W5, the raising amount H is increased by the preset “raising allowance” H2, H3, H4, H5 respectively, and the next weight loss This pulling position H is maintained until W is reached, and this control is repeated until “total discharge”.

  In the embodiment of FIG. 3, examples of “hanging weight W” and “lift amount H” are shown together with ().

  Preferably, the “suspending weight W” divided into a plurality of stages is made substantially uniform, and the “lifting allowance” from “H2” to “H5” of the “lift amount H” is “suspended weight” so that the powder P is discharged smoothly. It is preferable to increase the size sequentially so that it is small when the residual weight of the powder is large and large when the residual weight is small.

  The powder discharging operation by the flexible container bag discharging device 4 will be described with reference to FIGS.

(1) FIG. 4 (a) Flexible container mounting, connecting means connection:
The flexible container bag 2 filled with the powder P is hung by hanging the hanging rope 2h on the hanging metal fitting 7 of the hoist 6 and lowered onto the bag cradle 8 to place the flexible container bag 2 by the hoist 6. Hold in this state. The butterfly valve 22 is closed.
The connecting means 14 is brought into a non-connected state (FIG. 2A) by extending the cylinder 14b, and the discharge port 2c of the flexible container bag 2 is set on the cylindrical member 12. Next, the rod of the cylinder 14b of the connecting means 14 is contracted and lowered, and the discharge port 2c of the flexible container bag 2 is pressed against the upper end portion of the cylindrical member 12 to be connected (FIG. 2 (a)).

(2) Fig. 4 (b) Lifting the flexible container bag:
The strap 2e (FIG. 4A) that closes the discharge port 2c of the flexible container bag 2 is unwound and the discharge port 2c is opened. Next, the flexible container bag 2 is lifted and separated from the bag cradle 8 by a predetermined lifting amount H1 by the hoist 6, held in that position, and the powder P is discharged to the cylindrical member 12.

(3) Figure 5 (a) Start of discharge:
The butterfly valve 22 of the tubular member 12 is opened, and the discharge of the powder P from the flexible container bag 2 to the discharge destination hopper 10 is started.

(4) Fig. 5 (b) (c) Continuation of discharge, automatic lifting of flexible container bags:
Every time the suspended weight W reaches the preset weights W2, W3, W4, W5 from “discharge start” W1 to “full discharge” W6, the lift amount H is set to the preset “lifting allowances” H2, H3, It is increased by H4 and H5, and this pull-up position H is maintained until the next weight loss W is reached, and this control is repeated until “total discharge”.

(5) (Figure 5 (d) Total discharge:
When the powder P is “completely discharged”, the butterfly valve 22 is closed. If necessary, cleaning air is introduced into the empty flexible container bag 2 from the air connection port 18 with an automatic valve, and the dust collector connected to the dust collection port 20 with the automatic valve is operated. Thereafter, the connecting means 14 is brought into a non-connected state (FIG. 2A), and the flexible container bag 2 is removed.

  The effect of the flexible container bag discharging apparatus 4 as described above will be mainly described with reference to FIG.

  The flexible container bag discharging device 4 includes a bag receiving base 8 that supports the flexible container bag 2 suspended by the lifting and lowering means 6, a detecting means 9 that detects the suspended weight including the powder P of the flexible container bag 2, and an outlet 2c. A cylindrical member 12 that guides the powder P to the discharge destination 10, a connecting means 14 that detachably connects the upper end of the cylindrical member 12 and the discharge port 2c, and a discharge installed in the cylindrical member 12. On-off valve 22 that opens and closes the discharge of the powder P to the tip 10, and control means for intermittently controlling the “lifting amount” that is the amount by which the flexible container bag 2 is lifted by the lifting means 6 based on the detected suspension weight. 16 is provided.

  Then, when the powder P is discharged from the outlet 2c of the suspended flexible container bag 2, the “lifting allowance” is intermittently controlled based on the suspended weight by the control means 16 until the flexible container bag 2 discharges the entire amount. The flexible container bag 2 is always subjected to appropriate tension, and the powder is easily discharged. Further, when the powder P is discharged, the discharge port 2 c of the flexible container bag 2 and the cylindrical member 12 that guides the powder P to the discharge destination 10 are connected in a sealed state by the connecting means 14.

  Therefore, once the powder P in the flexible container bag 2 is set, the flexible container bag 2 is intermittently stretched until the whole amount is discharged, and is automatically discharged smoothly without any manual operation. The operator does not need to perform an operation of gradually lifting the flexible container bag 2, can leave the place, and does not have to put manpower during discharge. Further, when the powder is discharged, the discharge port 2c and the cylindrical member 12 are connected in a sealed state, so that generation of dust can be prevented.

  Further, the connecting means 14 includes a disc portion 12c formed in a size that covers the discharge port 2c of the flexible container bag 2 on the periphery of the upper end of the cylindrical member 12, and an annular seal 14a on the disc portion 12c. A plurality of cylinders 14b attached to the cylindrical member 12 that presses the covered outlet 2c with the annular member 15 are provided.

  Therefore, generation of dust during powder discharge can be reliably prevented.

  Further, the “raising allowance” that is the amount of increase is sequentially set to be larger from “start of discharge” to “total discharge”.

  Therefore, when the powder remaining in the flexible container bag 2 is reduced and the weight of the powder becomes small and it is difficult to fall down due to its own weight, the flexible container bag 2 is stretched and deformed by gradually increasing the “raising allowance” The discharge of the powder P can be promoted.

2: Flexible container 2c: Discharge port 4: Flexible container discharge device 6: Hoist (lifting means)
8: Bag base 9: Load cell: Detection means 10: Hopper (discharge destination)
12: cylinder member 12c: disc part 14: connection means 14a: seal 14b: cylinder 15: annular member 16: control means 22: butterfly valve (open / close valve)
H: Lifting amount W: Suspension load P: Powder

Claims (3)

A bag cradle for placing a flexible container bag, which is a flexible bag body filled with powder and suspended by an elevating means with the outlet at the bottom downward, supporting the peripheral edge of the bottom;
Detection means for detecting the suspended weight including the powder of the flexible container bag;
A cylindrical member installed under the bag pedestal for guiding the powder from the discharge port to the discharge destination;
A connecting means for connecting the upper end of the cylindrical member and the outlet of the flexible container bag placed in a sealed state in a separable manner;
An on-off valve installed on the cylindrical member for opening and closing the discharge of the powder to the discharge destination;
Control means for intermittently controlling the “lifting allowance”, which is the amount of lifting of the flexible container bag by the lifting means, based on the detected suspended weight,
Powder discharge is
The outlet of the flexible container bag placed on the bag cradle and the cylindrical member with the on-off valve closed are connected by connecting means, and the flexible container bag is raised by the lifting means until it is separated from the bag cradle, and this lifting position is maintained. To discharge the powder to the cylinder member, open the on-off valve and start,
The control means
Following this `` start discharge '', the flexible container bag is pulled up by the lifting and lowering means, and the lifting position is set in advance every time the lifting weight until `` total discharge '' reaches a preset weight divided into a plurality of stages. ”Raise up” and maintain this lifted position until the next weight loss is reached, and repeat this control until “full discharge”.
A flexible container bag discharging apparatus characterized by that. The connecting means is
A disk part formed in a size that covers the outlet of the flexible container bag on the periphery of the upper end of the cylindrical member;
A plurality of cylinders attached to a cylindrical member that presses the discharge port covered by an annular seal on the disc part with an annular member;
The flexible container bag discharging apparatus according to claim 1. "Raising fee"
From “Discharge Start” to “Total Discharge”, the value is set to be larger sequentially.
The flexible container bag discharging apparatus according to claim 1.