JP6612054B2 - Powder suction extraction tube and powder suction extraction device - Google Patents

Description

  The present invention relates to a powder suction / extraction tube that sucks and extracts powder in a bag with a nozzle and a powder suction / extraction device having the powder suction / extraction tube.

  Conventionally, in order to take out powder contained in a bag, a powder suction tube for taking out powder with the upper portion of the bag opened is disclosed (for example, see Patent Document 1). In this powder suction pipe, a pressure air injection nozzle is provided on the outer periphery of the suction port of the suction nozzle, and the compression of the bag and the bag adsorption are prevented by this pressure air injection.

  However, in the powder suction tube of Patent Document 1, in order to quickly take out the powder in the bag, the suction air amount of the suction nozzle is increased as much as possible, and the injection air amount of the injection nozzle is increased so that the bag is not adsorbed. There is a need to. For this reason, if the amount of jet air is increased, the powder in the bag is blown away to generate dust, so there is a limit to increasing the amount of jet air. In addition, the empty bag after the remaining amount of powder is reduced is easily adsorbed by the suction port. Furthermore, a resin bag such as polyethylene inserted in the bag has a problem that it is easily adsorbed. Further, in connection with the suction of the bag by the suction nozzle, it is difficult to completely suck the powder near the bottom of the bag, that is, the bag surface, and there is a problem that the powder tends to remain on the bottom.

  In order to solve these problems, a suction nozzle having an elevating means that is inserted through the opening into a bag having an upper opening and sucks and takes out the powder in the bag through the suction port at the tip, and is lifted and lowered together with the suction nozzle. A bag bottom presser that is formed in a frame shape surrounding the outer periphery of the suction port and that contacts the bag bottom in a state where a gap is formed between the tip of the suction nozzle and the bag bottom when the suction nozzle is lowered. An apparatus for sucking and taking out powder in a bag is disclosed (for example, see Patent Document 2). According to this apparatus, by pressing the bag with the bag bottom pressing body, it is possible to reliably prevent the bag from adsorbing to the suction port and to eliminate the problem that the powder cannot be taken out. Moreover, since the adsorption | suction of a bag is prevented, the powder of the bottom of a bag can be attracted | sucked reliably and the problem that powder remains on a bag bottom can also be solved.

  As another prior art, a powder suction device in which a suction nozzle for sucking powder in a cylindrical container is formed in a flat shape is disclosed (for example, see Patent Document 3). The first opening formed on the bottom surface of the nozzle has substantially the same length as the radius of the cylindrical container. According to the powder suction device, the powder in the cylindrical container can be sucked efficiently.

  Also, there is disclosed a sand raising device provided with a sand prevention wall that covers one end side of the suction pipe when sand is sucked and sanded from the suction port on one end side of the suction pipe by supplying fluid into the suction pipe. (For example, see Patent Document 4). This sand barrier wall is formed in a conical shape whose diameter increases toward the bottom. According to this sand raising device, the suction pipe can be prevented from being clogged and sand can be smoothly delivered.

  Further, a device for sucking and taking out powder in the bag is disclosed that reduces the amount of air sucked in when the remaining amount of powder in the bag is less than a predetermined amount (for example, Patent Documents). 5). This device detects the remaining amount of powder in the bag, means for injecting compressed air from the vicinity of the suction port, and reduces the amount of suction air from the suction air source and injects compressed air by the detecting means. Control means are provided. According to this apparatus, when the powder in the bag is sucked and taken out by the suction nozzle, the powder can be taken out efficiently without the bag adsorbing to the suction port of the nozzle.

Japanese Patent Laid-Open No. 9-254944 (Claim 1, paragraph [0010], FIG. 7) JP 2006-168852 A (Claim 1, paragraph [0013], FIG. 1) JP 2012-201466 A (Claim 1, paragraph [0013], FIG. 7) JP 2010-036151 A (Claim 1, Claim 3, Paragraph [0006], FIG. 2) JP 2006-111282 A (Claim 1, paragraph [0001], FIG. 1)

  However, in the apparatus for sucking and taking out powder in the bag shown in Patent Document 2, the tip of the suction nozzle is lowered when the suction nozzle is lowered in order to prevent the bag from adsorbing to the suction port of the suction nozzle. It is necessary to provide a frame-shaped bag bottom retainer that forms a gap between the bag bottom and the bag bottom, and when the suction nozzle is inserted into the powder by installing this bag bottom retainer The bag opening had to be opened wide.

  Further, in the suction nozzle shown in Patent Document 3 and the sandproof wall shown in Patent Document 4, the respective tips of the suction nozzle and the sandproof wall are widened. For this reason, when sucking powder instead of sand with a sand raising device, when the powder in the bag is extracted, the opening of the bag has to be opened widely. Further, the device for sucking and taking out powder in the bag shown in Patent Document 5 requires means for detecting the remaining amount of powder in the bag and, if necessary, means for injecting compressed air from the vicinity of the suction port. However, there is a problem that the powder suction control is complicated and the scale of the apparatus becomes large. Furthermore, in the powder suction and take-out device shown in Patent Documents 2 and 5, when the bottom area of the bag is wider than the outer diameter of the suction nozzle, in order to take out all the powder in the bag, the repose angle of the powder is used. As a result, it has been necessary to move the suction nozzle along the inner bottom surface of the bag, or to move the bag with the suction nozzle fixed.

  A first object of the present invention is to provide a powder suction / extraction tube capable of smoothly extracting powder without blocking the nozzle when the powder is sucked and extracted by a nozzle inserted into the powder contained in the bag. Is to provide. A second object of the present invention is to provide a powder suction / extraction tube that reliably sucks the powder remaining on the bottom of the bag without requiring complicated control and does not leave the powder on the bottom of the bag. It is in. A third object of the present invention is to provide a powder suction / extraction tube capable of extracting powder contained in a bag without generating dust without greatly opening the bag. A fourth object of the present invention is to provide a powder suction / extraction device that can completely extract the powder in the bag by inclining the bag to an angle exceeding the repose angle of the powder.

As shown in FIGS. 1 to 4, 6, and 9, the first aspect of the present invention includes a tube body 11 and a nozzle 12 connected to the tip of the tube body 11. The end 12 is connected to a suction pump 15 (FIG. 6), and the nozzle 12 is inserted into the powder 14 contained in the bag 13 having the filling port 17 for powder filling, and the bag is passed through the nozzle 12 by the suction force of the suction pump 15. In the powder suction / extraction tubes 10 and 30 for extracting the powder 14 contained in the bag 13 from the bag 13, the tube main body 11 is formed in a straight cylinder, and the nozzle 12 is formed in a straight cylinder or a tapered cylindrical body (FIGS. 3 and 4). A plurality of cuts 12b are formed at the nozzle opening end 12a, the tip is connected to the side of the nozzle 12 of the cylindrical body, and the pipe body 11 is provided to introduce compressed air into the tube body 11. The outer peripheral surface of the nozzle side part of the cylindrical body provided with the air introduction pipe 16 A tubular or rod-shaped nozzle blockage prevention body 33 protruding from the nozzle opening end 12a is provided, and the powder 14 is extracted from the bag 13 with the nozzle blockage prevention body 33 in contact with the inner bottom surface of the bag 13. When the tube main body 11 is inserted into the bag 13 from the filling port 17 until the nozzle blockage prevention body 33 comes into contact with the inner bottom surface of the bag 13, the filling port 17 has a portion corresponding to the filling port 17. A large-diameter portion 31 corresponding to the aperture is provided .

  A second aspect of the present invention is an invention based on the first aspect. As shown in FIGS. 1 and 6 to 9, the powder suction / extraction tubes 10 and 30 are filled with a filling port 17 for powder filling. The tube body 11 and the air introduction tube 16 are configured to be inserted into the bag 13 through the filling port 17.

As shown in FIG. 5, the third aspect of the present invention is an invention based on the first or second aspect , in which the powder suction and extraction pipes 10 and 30 have a notch 12b opened at a nozzle opening end 12a. It is characterized by being formed in a V shape (FIG. 5A), a U shape (FIG. 5B) or a U shape (FIG. 5C).

A fourth aspect of the present invention is an invention based on any one of the first to third aspects as shown in FIG. 9, wherein the powder suction / extraction tube 30 is open at the tip within the bag 13 and An air blowing pipe 32 for blowing compressed air into the bag 13 attached to the pipe body 11 is further provided.

As shown in FIGS. 6 to 9, the fifth aspect of the present invention is the powder suction / extraction tube 30 according to any one of the first to fourth aspects, and the powder suction / extraction tube 30. A suction pump 15 (FIG. 6) connected to the base end of the tube body, a bag holding device 18 for receiving and holding the bag 13 containing the powder 14, and a bag holding device attached to the bag holding device in a horizontal position The powder suction / extraction device 20 includes (FIG. 7) and an actuator 18a that is displaced from a horizontal position to a position (FIG. 8) that is inclined to an angle θ that exceeds the angle of repose of the powder 14 (FIG. 8).

A sixth aspect of the present invention is an invention based on the fifth aspect , and further includes a compression pump 19 (see FIG. 6) connected to the other end of the air introduction pipe body 16c of the air introduction pipe 16 as shown in FIG. 6).

7th viewpoint of this invention is invention based on 5th viewpoint, Comprising: As shown in FIGS. 6-8, it is the powder suction / extraction apparatus 20 whose actuator 18a is a fluid pressure cylinder.

An eighth aspect of the present invention is an invention based on the fifth aspect , and as shown in FIGS. 6 to 8, the bag holding device 18 has wheels 18j and 18k at its bottom and is configured to be transportable. This is a powder suction / extraction device 20.

In the powder suction / extraction tube according to the first aspect of the present invention, the nozzle opening end is provided with a tubular or rod-shaped nozzle blockage prevention body protruding from the nozzle opening end on the outer peripheral surface of the nozzle side portion of the cylindrical body. The gap with the bottom surface in the bag can be increased. As a result, when the powder is sucked and extracted by the nozzle inserted into the powder contained in the bag, the bottom of the bag is less likely to be adsorbed to the nozzle opening end, and the powder can be extracted more smoothly. If the nozzle blockage prevention body is formed into a tubular shape, it is possible to secure a passage for powder and air in addition to the cut at the nozzle opening end, thereby improving the cut-off blocking effect. The air introduced from the air introduction tube causes aeration in the tube main body, and the powder sucked into the tube main body is smoothly extracted from the powder suction / extraction tube without clogging inside the tube main body. Further, when the tube main body is inserted into the bag from the filling port until the nozzle blockage prevention body comes into contact with the bottom surface of the bag, a portion of the tube main body corresponding to the filling port is provided with a large diameter portion corresponding to the diameter of the filling port. In addition, there is no gap between the filling port and the tube body, and foreign matter can be prevented from entering the bag through the filling port from the outside of the bag.

The powder suction / extraction tube according to the first aspect is such that the nozzle blockage prevention body always abuts or adsorbs to the inner bottom surface of the bag by the suction force of the suction pump during the suction operation, and sucks the powder from the cut. Therefore, the powder remaining on the bottom of the bag is reliably sucked without requiring complicated control, and the powder does not remain on the bottom of the bag. Further, this powder suction / extraction tube has a tube body formed in a straight tube, a nozzle formed in a straight body or a tapered tubular body, and an air introduction tube attached to the tube body. There is no need to open the bag large at the time of insertion, whereby the powder in the bag can be extracted without being scattered as dust from the opening of the bag.

  In the powder suction / extraction tube according to the second aspect of the present invention, a powder filling port provided in the bag is used, and the tube body and the air introduction tube are inserted into the bag from the filling port. The powder in the bag can be extracted, and there is no need to newly provide an opening for the powder suction / extraction in the bag, and dust is not scattered around during the powder suction / extraction to improve the work environment. .

Further, in the powder suction / extraction tube of the third aspect of the present invention, a V-shape (FIG. 5 (a)), a U-shape ( The notch 12b formed in FIG. 5B or U-shape (FIG. 5C) can be used.

The powder suction / extraction tube of the fourth aspect of the present invention includes an air blowing tube for blowing compressed air into the bag, and air is blown from the air blowing tube during the extraction of the powder. Prevents the bag from shrinking during extraction. As a result, until the powder is completely extracted from the bag, the shape of the bag is maintained at the same shape as before the powder is extracted, and the powder can be extracted more smoothly.

Further, in the powder suction / extraction device according to the fifth aspect of the present invention, the bag is held by the bag holding device and is displaced by the actuator to a position inclined to an angle exceeding the repose angle of the powder. Because the suction force of the suction pump sucks powder from the nozzle of the powder suction and extraction tube, even if the bottom area of the bag is wider than the outer diameter of the suction nozzle, the powder gathers at the nozzle and the powder is contained in the bag. Does not remain, and the powder can be completely extracted from the bag.

In the powder suction / extraction device according to the sixth aspect of the present invention, when the powder suction / extraction tube sucks and extracts the powder, the nozzle is not blocked by the cutting of the nozzle opening end, and is removed from the air introduction tube. Since the inside of the tube body is not clogged with the sucked powder due to the introduction of compressed air, the powder can be smoothly extracted from the bag.

In the powder suction / extraction apparatus according to the seventh aspect of the present invention, the angle of repose of the powder can be reduced by an actuator using a fluid pressure cylinder without requiring much labor even if the weight of the bag filled with the powder is large. The bag holding device can be tilted to an angle that exceeds.

Furthermore, in the powder suction / extraction device according to the eighth aspect of the present invention, the bag holding device can be easily transported together with the powder suction / extraction tube to a place where the powder needs to be extracted.

It is sectional drawing of the powder suction extraction pipe | tube of this embodiment. It is a perspective view of the powder suction extraction tube. It is a side view of the nozzle formed in the cylindrical body of the straight body of the powder suction extraction pipe and the air introduction pipe. It is a side view of the nozzle and air introduction pipe which were formed in the tapered cylindrical body of the powder suction extraction pipe. It is an expanded view of the nozzle front-end | tip part which shows the shape of the notch | incision in the nozzle front-end | tip part of the powder suction extraction pipe | tube. 5A shows a V-shaped cut, FIG. 5B shows a U-shaped cut, and FIG. 5C shows a U-shaped cut. It is an air circuit diagram of the powder suction extraction tube. It is a figure which shows the state which inserted the powder suction extraction pipe | tube before the powder extraction of the powder suction extraction apparatus of this embodiment in the bag. It is a figure which shows the state which is extracting the powder from the bag with the powder suction extraction device. It is a block diagram of the powder suction extraction pipe | tube of another this embodiment.

<First Embodiment>
It will be described with reference to the first embodiment in the drawings in the following. The first embodiment described below is a reference form of the present invention. The second embodiment described below is an embodiment of the present invention. As shown in FIG. 1 to FIG. 3 and FIG. 6, the powder suction / extraction tube 10 of the first embodiment is used for sucking and extracting a powder 14 contained in a paper bag 13. The powder suction / extraction tube 10 includes a tube body 11 and a nozzle 12 connected to the tip of the tube body 11. The proximal end of the tube body 11 is connected to the suction pump 15 (FIG. 6). In this embodiment, the suction pump 15 is a diaphragm pump, and driving air is introduced into the diaphragm pump by opening and closing the valve 15a. Although not shown, a diaphragm pump that electrically drives the diaphragm may be used, or powder may be sucked using a general centrifugal pump or blower. In the powder suction / extraction tube 10, the nozzle 12 is inserted into the powder 14 contained in the bag 13, and the powder 14 contained in the bag 13 is extracted from the bag 13 through the nozzle 12 by the suction force of the suction pump 15. Configured. The powder suction / extraction tube 10 has a tube body 11 formed in a straight cylinder, a nozzle 12 formed in a cylindrical body (FIG. 3), and a plurality of cuts 12b formed in a nozzle opening end 12a. The powder suction / extraction tube 10 includes an air introduction tube 16 for introducing compressed air into the tube main body, the tip of which is connected to the side of the nozzle 12 of the cylindrical body and attached to the tube main body 11. The powder 14 is extracted from the bag 13 with the nozzle opening end 12 a in contact with the bottom surface of the bag 13.

  As shown in FIGS. 1 to 3, the cylindrical nozzle 12 has a large-diameter portion 12 d on the distal end side, a small-diameter portion 12 e on the side connected to the tube main body, and an inclined portion 12 f that connects them. It is a hard synthetic resin pipe typified by a vinyl chloride pipe. In this embodiment, six V-shaped cuts 12b are formed at the nozzle opening end 12a of the large diameter portion 12d. The large-diameter portion 12d of the nozzle 12 may not be a straight body but may have a tapered shape as shown in FIG. The tapered shape has an effect that it is not necessary to widen the opening of the bag, and an effect that the powder suction / extraction tube can be easily inserted into the powder. The shape of the notch 12b is not limited to the V shape shown in FIGS. 1 to 3 and FIG. 5A, but is a U shape shown in FIG. 5B, a U shape shown in FIG. The shape may be acceptable. Moreover, the internal diameter of the large diameter part 12d exists in the range of 10-80 mm. The depth of the notch 12b is at least 10 mm, preferably in the range of 20 to 40 mm. The size of the notch 12b at the nozzle opening end 12a is in the range of 10 to 20 mm. The number of the cuts 12b is determined by the peripheral length of the large diameter portion 12d and the size of the cuts 12b at the nozzle opening end 12a. The plurality of cuts 12b are preferably provided at equal intervals around the large diameter portion 12d. The number, size, and shape of the cuts are determined in order to efficiently suck the powder according to the type of powder to be extracted, the required extraction speed, the inner diameter of the large diameter portion 12d, the inner diameter of the tube body 11, and the like. .

  More specifically, the notch 12b has a shape, depth, and number of the notches 12b, as shown in FIGS. 5A to 5C, in a portion from the nozzle opening end 12a to the depth of the notches 12b. When the total area of the nozzle tip 12c viewed from the side of the nozzle before the cut formation is 100%, the tip 12c of the nozzle 12 is defined as a plurality of cuts 12b viewed from the nozzle side of the nozzle tip 12c. The ratio of the total area is determined to be 10% to 90%, preferably 20% to 75%. If this ratio is less than 10%, the amount of powder sucked by cutting becomes too small, and if it exceeds 90%, the nozzle opening end becomes fragile and the nozzle tip tends to be damaged when the nozzle is inserted.

  The pipe body 11 formed in a straight cylinder is made of a hard synthetic resin pipe typified by a vinyl chloride pipe, and its distal end is inserted into the base end of the nozzle 12 and joined by an adhesive or the like. In this embodiment, the tip of the tube body 11 is inserted into the nozzle small diameter portion 12e. Although not shown, the diameter of the tube body 11 may be increased to be equal to the large diameter nozzle portion 12d, and the small diameter nozzle portion 12e may be inserted into the tube main body. Further, the tube main body and the nozzle small diameter portion may be screwed together so that the nozzle 12 can be detached from the tube main body 11. In this embodiment, an L-shaped small-diameter pipe 16a is inserted into a hole provided in the side portion of the nozzle 12 in the side portion of the large-diameter portion 12 in this embodiment. The distal end of the air introduction pipe main body 16c is connected to the proximal end of the small diameter pipe 16a via the connector 16b. In this embodiment, the air introduction tube 16 is a nylon tube, and the air introduction tube main body 16c is provided along the tube main body 11, and is bound by a band 21 (see FIG. 2). The small diameter pipe 16a, the connector 16b, and the air introduction pipe main body 16c constitute an air introduction pipe 16. A compression pump 19 is connected to the proximal end of the air introduction pipe body 16c as shown in FIG. Reference numeral 19a in FIG. 6 is an open / close valve. In this embodiment, the compressed pump 19 controls the compressed air that has been dried to a speed of 1 to 2 m / second by a flow meter (not shown) and introduces it into the air introduction pipe 16. In FIG. 1, the flow of the powder 14 is indicated by a solid line arrow, and the flow of compressed air is indicated by a broken line arrow.

  6 to 8 show a powder suction / extraction device 20 according to an embodiment of the present invention. The powder suction / extraction device 20 includes a pipe main body 11 and a nozzle 12 connected to the tip of the pipe main body, and a powder suction / extraction pipe 10 for extracting powder 14 contained in the bag 13 through the nozzle from the bag. A suction pump 15 (FIG. 6) connected to the tube main body base end of the powder suction / extraction tube 10, a bag holding device 18 for storing and holding the bag 13 containing the powder 14, and the bag holding The bag holding device attached to the apparatus is displaced to a horizontal position (FIG. 7) and a position (FIG. 8) inclined from the horizontal position to an angle θ exceeding the repose angle of the powder 14, for example, a maximum of 50 degrees from the repose angle. And an actuator 18a that can be used. In the embodiment shown in FIG. 8, the repose angle of the powder 14 is 35 degrees, and the inclined angle θ is 60 degrees.

  In this embodiment, the powder suction / extraction tube 10 shown in FIGS. 1 and 2 is used. The repeated description of the powder suction / extraction tube 10 is omitted. The bag holding device 18 includes two base frames 18b (only one base frame is shown in FIGS. 7 and 8) provided in parallel at a predetermined interval, and a bag holding frame above these base frames 18b. 18c is provided. An actuator 18a is pivotally supported on the base frame 18b by a support. A beam 18d is installed between one ends of the two base frames 18b. The beam 18d is placed on the rear side (left end in the figure) of the bottom of the bag holding frame 18c. In this embodiment, the bag holding frame 18c has a volume corresponding to the thickness of the bag and is formed in a cage shape so that the flat bag 13 can be shaped and stored during suction extraction. The actuator 18a is a fluid pressure cylinder in this embodiment. The tip of the cylinder rod 18e of the fluid pressure cylinder is pivotally supported by a first bracket 18f fixed to the substantially center of the bottom of the bag holding frame 18c. A second bracket 18g is fixed to the bottom of the bag holding frame 18c slightly forward of the first bracket 18f, and a third bracket 18h is fixed to the upper surface of the base frame 18b so as to face the second bracket 18g. . A third bracket is also provided on the upper surface of the other base frame (not shown in FIGS. 7 and 8), and a second bracket is also provided on the bottom of the bag holding frame in opposition thereto. The support shaft 18i passes through the second and third brackets 18g and 18f so as to straddle the two base frames 18b. The thickness of the bag holding frame 18c (the size in the direction perpendicular to the paper surface in FIGS. 7 and 8) is narrower than the interval between the two base frames 18b. Wheels 18j and 18k are disposed in front of and behind the bottom of the two base frames 18b. In this embodiment, when the cylinder rod 18e of the actuator 18a which is a fluid pressure cylinder is extended to the maximum, the bag holding frame is inclined to an angle θ (FIG. 8) exceeding the repose angle of the powder.

  Next, a method of using the powder suction / extraction device 20 according to the embodiment of the present invention will be described. First, the bag holding device 18 is prepared so that the bag holding frame 18c shown in FIG. 7 is in a horizontal position. Next, the bag 13 filled with the powder having the powder filling port 17 at the corner of the bag is accommodated in the bag holding frame 18c. The bag is stored in such a manner that when the bag holding frame 18c is tilted by the actuator 18a, the corner of the bag corresponding to the lower part of the filling port 17 becomes the lowermost part of the bag holding frame 18c. Next, in order to fill the powder, the bag filling port 17 is opened, and the powder suction / extraction tube 10 is straightly inserted into the powder from the opened filling port 17. More specifically, as shown in FIG. 1, the powder suction / extraction tube 10 is inserted until the open end 12 a of the nozzle 12 of the powder suction / extraction tube contacts the inner bottom surface of the corner of the bag 13. When the filling port is not at the corner of the bag, for example, at the center of the bag, the nozzle opening end 12a is located at the corner of the bottom surface of the bag that becomes the bottom when the bag holding frame 18c is inclined. The powder suction extraction tube 10 is inserted so as to be positioned.

  Subsequently, the actuator 18a, which is a fluid pressure cylinder, is operated to extend the cylinder rod 18e. As a result, the bag holding frame 18c of the bag holding device 18 is tilted about the support shaft 18i, and the bag holding frame holding the bag 13 is displaced from the horizontal position to an angle θ exceeding the angle of repose of the powder (FIG. 8). .

  After the state shown in FIG. 8 is reached, the suction pump 15 is driven. Thereafter or simultaneously with this driving, the compression pump 19 is driven. A suction force is generated in the tube main body 11 by driving the suction pump 15, and the powder 14 in the bag is sucked into the tube main body 11 through the notch 12b of the nozzle opening end 12a and extracted from the bag. Even when the bag is adsorbed to the open end 12a of the nozzle 12 when the powder 14 is extracted, the powder is sucked into the tube body 11 by the notch 12b and the nozzle 12 is not blocked. Compressed air is generated by driving the compression pump 19, and this compressed air is introduced into the pipe body 11 from the air introduction pipe 16. The aeration is generated in the tube main body 11 by the compressed air, and the powder 14 can be smoothly extracted from the powder suction / extraction tube 10 without clogging the sucked powder inside the tube main body. Further, since the bag holding frame 18c is maintained at an angle θ exceeding the repose angle of the powder, even when the bottom area of the bag 13 is wider than the outer diameter of the nozzle large diameter portion 12d, the nozzle and the bag are not moved. All the powder 14 in the bag is automatically collected at the nozzle opening end 12a. As a result, the nozzle opening end always abuts against the inner bottom surface of the bag 13 during the suction operation, and the powder is sucked from the cut, so that the powder remaining on the bottom of the bag is reliably sucked and the bag All the powder can be extracted without leaving any powder on the bottom.

  After the powder extraction operation is completed, the compression pump 19 is stopped, the cylinder rod 18e of the actuator 18a that is a fluid pressure cylinder is contracted, the bottom of the bag holding frame 18c is placed on the beam 18d, and the bag holding frame 18c is moved. Set to the horizontal position (FIG. 7). Thus, the powder in the bag can be extracted completely and smoothly by a simple operation of turning on and off the suction pump 15 and the compression pump 19 from the start of use to the end of use of the powder suction / extraction device 20.

  The empty bag is taken out from the bag holding frame 18c and placed together with the powder suction / extraction tube 10 on a flat place, and then wrapped around the powder suction / extraction tube 10 or the bag is removed by the powder suction / extraction tube 10. Wind up. Thereafter, the suction pump 15 is stopped and the powder suction / extraction tube 10 is gently extracted from the bag to prevent generation of dust from the bag and the powder adhering to the powder suction / extraction tube spills out of the bag. The amount can be minimized. The powder suction / extraction device 20 can be easily transported to a desired place during or after use by the wheels 18j and 18k.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIG. In 2nd Embodiment, the same code | symbol is used for the same component as 1st Embodiment. The powder suction / extraction tube 30 of this embodiment is a tube corresponding to the filling port 17 when the tube body 11 is inserted into the bag 13 from the filling port 17 until the nozzle opening end 12a contacts the inner bottom surface of the bag 13. A large-diameter portion 31 corresponding to the diameter of the filling port 17 in a portion of the main body 11, an air blowing pipe 32 for blowing out compressed air into the bag 13, the tip of which opens in the bag 13 and attached to the pipe main body 11; Further, a tubular or rod-shaped nozzle blocking prevention body 33 protruding from the nozzle opening end 12a is further provided on the outer peripheral surface of the nozzle side portion 12d of the cylindrical body. Since the configuration other than the large-diameter portion 31, the air blowing pipe 32, and the nozzle blockage prevention body 33 is the same as that of the first embodiment, repeated description is omitted.

  The large-diameter portion 31 includes a cylindrical portion 31a having an outer diameter slightly smaller than the diameter of the filling port 17, and a tapered portion 31b whose proximal end is connected to the cylindrical portion 31a and whose distal end is fitted to the tube body 11. Prepare. By providing the taper portion 31b, the powder suction / extraction tube 30 can be easily inserted into the bag. The cylindrical part 31a and the taper part 31b are integrally formed. The large diameter portion 31 is formed by a hard synthetic resin pipe typified by a vinyl chloride pipe. The large-diameter portion 31 is preferably provided so as to be slidable with respect to the tube main body 11 so as to correspond to the filling port of the bag according to the size of the bag. The large-diameter portion 31 is provided with an air introduction pipe body 16c and an air blowing pipe 32 penetrating therethrough.

  The air blowing pipe 32 is attached to the pipe body 11 so that the tip thereof is located in the bag 13. Although not shown, the other end of the air blowing pipe 32 is connected to a compressed air source. The air blowing pipe 32 is bound to the pipe main body 11 together with the air introduction pipe main body 16 c by the band 21. The tip of the air blowing pipe 32 serves as an air blowing nozzle.

  In this embodiment, the nozzle blockage preventing bodies 33 are tubular, extend in the length direction of the tube body 11, and are bonded to the outer peripheral surface of the nozzle side portion 12d of the cylindrical body at intervals of 90 degrees. Each tip of the four tubular nozzle blockage prevention bodies 33 is cut obliquely, and the cut surface is directed to the notch 12b at the nozzle opening end. In addition, the number of the nozzle obstruction | occlusion prevention bodies 33 is not restricted to four, and may be 1 to 3 or 5 or more. Further, it is not limited to a tubular shape, and may be a rod shape.

  In the powder suction / extraction tube 30 of the second embodiment configured as described above, filling is performed when the tube body 11 is inserted into the bag through the filling port 17 until the nozzle opening end 12a contacts the bottom surface of the bag. Since the large diameter portion 31 corresponding to the diameter of the filling port 17 is provided in the portion of the tube body 11 corresponding to the port 17, no gap is generated between the filling port 17 and the tube body 11. As a result, foreign matter can be prevented from entering the bag through the filling port 17 from the outside of the bag. During the extraction of powder from the air blowing pipe 32 that blows out compressed air into the bag, the air is adjusted to an amount that suppresses the shrinkage of the bag due to the extraction of the powder, and is blown out, thereby extracting the powder. In addition, the bag 13 is prevented from contracting, and the powder can be more smoothly extracted by maintaining the shape of the bag 13 as before the powder is extracted until the powder is completely extracted from the bag. Furthermore, by providing a tubular or rod-shaped nozzle blockage prevention body 33 protruding from the nozzle opening end on the outer peripheral surface of the nozzle side portion of the cylindrical body, the gap between the nozzle opening end 12a and the inner bottom surface of the bag 13 can be increased. In addition, the bottom of the bag 13 is less likely to be adsorbed to the nozzle opening end 12a, and the powder can be extracted more smoothly. If the nozzle blockage prevention body 33 is formed in a tubular shape, a passage for powder and air can be secured in addition to the cut 12b at the nozzle opening end 12a, and the blockage prevention effect of the cut 12b can be improved.

  The powder suction / extraction tube 30 of the second embodiment is similar to the powder suction / extraction tube 10 of the first embodiment, and the bag holding device 18 of the powder suction / extraction device 20 shown in FIG. Is inserted straight into the powder of the bag filled with the powder contained in the basket-type bag holding frame 18c (not shown). Thereafter, the powder is extracted from the bag using the powder suction extraction tube 30 in the same manner as in the first embodiment.

  In the first and second embodiments, the powder suction / extraction tube 10 or 30 shown in FIG. 1 is used for the powder suction / extraction device 20, but the powder suction / extraction device of the present invention is the same. Not only the powder suction / extraction tube but also an existing powder suction / extraction tube can be used.

10, 30 Powder suction extraction pipe 11 Pipe body 12 Nozzle 12a Nozzle opening end 12b Notch 12c Nozzle tip 13 Bag 14 Powder 15 Suction pump 16 Air inlet pipe 17 Bag filling port 18 Bag holding device 18a Actuator 19 Compression pump 20 Powder suction / extraction device 31 Large diameter portion 32 Air blowing pipe 33 Blocking prevention body

Claims (8)

A tube body and a nozzle connected to the distal end of the tube body, the proximal end of the tube body is connected to a suction pump, and the nozzle is inserted into powder contained in a bag having a filling port for powder filling. In the powder suction extraction pipe for extracting the powder that has entered the bag through the nozzle by the suction force of the suction pump from the bag,
The tube body is formed in a straight tube, the nozzle is formed in a straight tube or a tapered tubular body, a plurality of cuts are formed in the nozzle opening end, a tip is connected to a nozzle side portion of the tubular body, and An air introduction pipe attached to the pipe body for introducing compressed air into the pipe body, and protruding from the nozzle opening end provided on the outer peripheral surface of the nozzle side portion of the cylindrical body It comprises a tubular or rod-shaped nozzle blockage prevention body, and is configured to extract the powder from the bag in a state where the nozzle blockage prevention body is in contact with the bottom surface of the bag ,
When the tube main body is inserted into the bag from the filling port until the nozzle blockage prevention body contacts the bottom surface of the bag, the portion of the tube main body corresponding to the filling port corresponds to the diameter of the filling port. A powder suction / extraction tube having a large diameter portion . 2. The powder according to claim 1, which is used for extracting powder in a bag having a filling port for powder filling, and wherein the tube main body and the air introduction tube can be inserted into the bag through the filling port. Suction extraction tube.
In the suction extraction tube, 3. The powder suction / extraction tube according to claim 1, wherein the cut is formed in a V shape, a U shape, or a U shape that opens at the nozzle opening end. Tip is additionally provided in the opening vital the tube body within the bag, the powder suction extraction according to a further 1 Section 3 or to claims 1 comprising a air outlet tube for blowing compressed air into said bag tube. A powder suction / extraction tube according to any one of claims 1 to 4, a suction pump connected to a tube main body base end of the powder suction / extraction tube, and a bag containing powder. Powder suction device comprising: a bag holding device for holding; and an actuator attached to the bag holding device for displacing the bag holding device from a horizontal position to a position inclined from the horizontal position to an angle exceeding the repose angle of the powder. Extraction device. The powder suction / extraction device according to claim 5, further comprising a compression pump connected to the other end of the air introduction tube main body of the air introduction tube. The powder suction / extraction device according to claim 5 , wherein the actuator is a fluid pressure cylinder. The powder suction / extraction device according to claim 5, wherein the bag holding device has a wheel at its bottom and is configured to be transportable.

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