JP2009208824A - Powder and granular material discharging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder and granular material discharging device capable of easily and rapidly connecting and detaching a bag thereto/therefrom when discharging a powder and granular material stored in the bag, and preventing the powder and granular material from being scattered or dropped therefrom. <P>SOLUTION: The powder and granular material discharging device is equipped with a device body 10 for suspending a bag 3 which stores the powder and granular material and has a discharging port 3a of the powder and granular material, a cylindrical discharging unit 61 with the discharging part of the powder and granular material covered thereon so as to discharge the powder and granular material, and a clamp 63 for detachably attaching the discharging port of the powder and granular material to the cylindrical discharging unit. The clamp has a tube 66 and an annular holding part 67. When the clamp is lowered, an inner peripheral part 67a of the annular holding part folds the discharging port of the powder and granular material to the center side from an inner peripheral surface of the cylindrical discharging unit and presses it against an upper surface of the cylindrical discharging unit, and the swollen tube 66 presses the discharging port of the powder and granular material housed to the cylindrical discharging unit against an outer peripheral surface of the cylindrical discharging unit. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a granular material discharging apparatus used for discharging granular materials contained in a bag such as a flexible container bag.

  Conventionally, when a granular material is transported from a specific place to another place, a flexible container bag is often used from the viewpoint of easy storage. This flexible container bag is formed into a bag shape from a flexible material / cloth, and a cylindrical discharge port portion is formed on the bottom surface.

  This flexible container bag is formed by filling the granular material from above with the discharge port portion closed by a string or the like, and by opening the bag by releasing the closed state of the discharge port portion by this string or the like. The granular material stored in the flexible container bag can be discharged.

  Then, the granular material discharge apparatus which discharges a granular material from a flexible container bag is proposed (for example, refer patent document 1). Such a granular material discharging apparatus is provided with an apparatus main body that suspends a flexible container bag in which the granular material is housed and a discharge opening for the granular material is formed, and is suspended at a bottom portion of the apparatus main body. And a discharge tool that is detachably connected to the discharge port of the flexible container bag.

  When discharging the granular material from the flexible container bag, the lower portion of the discharge port portion is covered with a discharge tool, and the discharge port portion of the flexible container bag is fastened and fixed around the discharge tool using a clamp.

  After the discharge port portion of the flexible container bag and the discharge tool are thus tightly connected, the discharge port portion of the flexible container bag is opened by releasing the binding string that closes the discharge port portion. The inner granular material falls by its own weight and is discharged through the discharge port.

Here, as shown in FIG. 11, the clamp 100 includes a pair of sandwiching bodies 101, 101 that can be opened and closed in the left-right direction, and by fastening both ends of both sandwiching bodies 101, 101 with bolts 102, flexible The well-known thing which can connect the discharge port part and discharge tool of a container bag is used. Alternatively, as shown in FIG. 12, an appropriate string 107 may be used in place of the clamp, and the discharge port portion 105 of the flexible container bag enclosing the discharge device 106 may be tied with the string 107.
JP 2000-296818 A

  However, the conventional granular material discharging apparatus disclosed in Patent Document 1 is configured to fasten and fix a pair of sandwiching bodies 101, 101 that can be opened and closed in the left-right direction of the clamp 100 with bolts 102. Since the clamp 100 requires the operation of the bolt 102, the attaching / detaching work of the clamp 100 is complicated and troublesome. Moreover, since the aperture diameter at the time of fastening of the clamp 100 is constant, it is limited to use of the discharge tool which has a specific diameter, and lacks versatility. As a result, it is necessary to prepare a plurality of types of clamps 100 having different diameters.

  Further, when the strap 107 shown in FIG. 12 is used, the discharge port portion 105 of the flexible container bag that wraps the discharge tool 106 is tied with the string 107. In the meantime, the granular material 108 remains. As a result, after the discharge operation of the granular material is finished, if the string 107 is released and the discharge port portion 105 of the flexible container bag is removed from the discharge tool 106, the remaining granular material is scattered or dropped on the floor. This will contaminate the floor and cause the working environment to deteriorate.

  The present invention has been proposed in order to solve the problems of the above-described conventional apparatus, and in discharging a granular material stored in a bag such as a flexible container bag, the bag and the granular material discharging are performed. It is an object of the present invention to connect or remove the apparatus easily and quickly and to prevent the powder particles from being scattered or dropped.

  The present invention has been made in order to solve the above-described problems. The apparatus main body suspends the bag in which the powder is housed and the discharge port of the powder is formed, and the powder is discharged. In a granular material discharging apparatus comprising: a cylindrical discharge portion that covers the discharge port portion of the granular material, and a clamp portion that detachably attaches the discharge port portion of the granular material to the cylindrical discharge portion The clamp portion is located above the cylindrical discharge portion and is provided so as to be movable up and down with respect to the cylindrical discharge portion. Further, the clamp portion expands in the inner diameter direction by fluid pressure or contracts by discharging the fluid. An annular tube, and an annular retainer portion having an inner peripheral portion that protrudes closer to the center than the inner peripheral surface of the cylindrical discharge portion, and when the clamp portion is lowered, the inner peripheral portion of the annular retainer portion However, the discharge port part of the granular material is closer to the center than the inner peripheral surface of the cylindrical discharge part. Ri bend and causes pressed against the upper surface of the cylindrical discharge portion, inflated tube is to be pressed outlet portion of the fitted on the granular material into the tubular discharge portion on the outer peripheral surface of the tubular discharge portion.

  In the granular material discharging apparatus of the present invention, when the clamp part is lowered, the inner peripheral part of the annular pressing part of the clamp part is pressed against the upper surface of the cylindrical discharge part so that the discharge port part is folded from the outside to the inside. Hold it. Further, when compressed air is supplied to the tube, the tube expands in the inner diameter direction. Therefore, the discharge port portion is pressed against the outer peripheral surface of the cylindrical discharge portion and is sandwiched between the cylindrical discharge portion. The part and the cylindrical discharge part are connected.

  By this connection, the discharge port portion is folded at the center side with respect to the inner peripheral surface of the cylindrical discharge portion at the inner peripheral portion of the annular pressing portion, so that the granular material is formed between the discharge port portion and the cylindrical discharge portion. It wo n’t get in between.

  Furthermore, since the discharge port portion is covered with the cylindrical discharge portion and connected to the cylindrical discharge portion via the tube, the connection between the discharge port portion and the cylindrical discharge portion becomes strong, The granular material passing through the cylindrical discharge portion from the discharge port portion does not become inadvertently scattered as dust. In addition, after the discharge operation is finished, when the clamp part is raised and the discharge port part is removed from the cylindrical discharge part, the powder particles do not remain between the discharge port part and the cylindrical discharge part. The granular material is not scattered as dust, contaminates the floor surface, and does not cause deterioration of the working environment.

  Further, since the discharge port portion is configured to cover the cylindrical discharge portion and to be connected to the cylindrical discharge portion via the tube, the diameter of the tube is different even when the diameter of the cylindrical discharge portion is different. The difference in the diameter of the cylindrical discharge portion can be absorbed and reliably chucked by the elastic force in the direction.

  The present invention can easily and quickly connect or remove the bag and the granular material discharging device when discharging the granular material stored in a bag such as a flexible container bag, and the granular material is scattered. Can be reliably prevented from falling or falling.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-10 shows one Embodiment of the granular material discharge | emission apparatus which concerns on this invention. As shown in FIGS. 1 to 3, the granular material discharge device 1 includes a device main body 10 that suspends a flexible container bag (hereinafter referred to as a bag) 3 as a bag in which salt as a granular material is expropriated. I have.

  The apparatus body 10 includes a gantry 11 and a top member 20, and the gantry 11 includes four columns (front columns 14a and 14a and rear columns 14b and 14b) and upper and lower columns connected between the front and rear columns 14a and 14b. Both side connecting members 15a and 15b, and upper and lower rear connecting members 16a and 16b installed between the rear columns 14b and 14b.

  An elevating cylinder 17 is fixed upward at the upper ends of the front and rear columns 14a and 14b, and the top member 20 is connected to the gantry 11 through the rod 17a of the elevating cylinder 17 so as to be movable up and down. On the lower surface of the top member 20, a hanger portion 21 for detachably locking the upper portion of the bag 3 is provided.

  A floor plate 25 having a central opening is horizontally installed on the lower connecting members 15a and 16a, and a discharge promoting device 30 is attached to the upper surface of the floor plate 25. As shown in FIGS. 4 and 5, the discharge promoting device 30 operates in a vertical direction with respect to the base frame 32 fixed to the floor plate 25 via a plurality of legs 31 made of rubber or the like. There is provided a bottom plate 35 that can be freely (rotated), and an operating means 40 that rotates the bottom plate 35 up and down.

  The base frame 32 includes an upper base frame 32a and a lower base frame 32b that are rectangular frames in plan view.

  The bottom plate 35 includes a plurality of (for example, four in the present embodiment) plate members arranged as a set, and each bottom plate 35 of the apparatus main body 10 is arranged so that both side edges 35a and 35a thereof are close to each other. It inclines so that the width becomes narrower toward the center. Further, the front edge 35b of each bottom plate 35 is formed in an arc shape, and the discharge port 3a protruding below the bag 3 is inserted into the center of the apparatus body 10 by the front edge 35b of the bottom plate 35. An opening 36 is formed.

  A plurality of stays 37 protrude downward from the lower surface of the outer portion of each bottom plate 35 at intervals, and these stays 37 are horizontally attached to an attachment portion 33 erected on the upper surface of the upper base frame 32a. Are connected via a support shaft 34. Therefore, each bottom plate 35 is rotatable up and down about the support shaft 34 so that the tip end side (the center side of the apparatus main body 10) which is the free end side thereof moves up and down.

  Moreover, each bottom plate 35 is comprised so that it may act | operate simultaneously by the air lifter 40 as an operation means. The air lifter 40 includes a bellows-like annular contraction portion 41 that can be expanded or contracted by air pressure, an upper member 43 provided at the upper end of the annular contraction portion 41, and an expansion or contraction operation of the annular contraction portion 41. And a plurality of connecting members 44 composed of vertically moving rods.

  The annular contraction part 41 is formed in an annular shape having an opening 41a penetrating in the vertical direction while a soft member having elasticity such as rubber that can expand or contract is formed in a bellows shape. An air intake / exhaust means (not shown) is connected to the annular contraction portion 41, and air is press-fitted or exhausted into the annular contraction portion 41 from this means, and the annular contraction portion 41 is caused by the air pressure. It can be expanded or contracted.

  An annular contraction portion support plate 45 is interposed between the upper base frame 32a and the lower base frame 32b, and the lower surface of the annular contraction portion 41 is fixed to the annular contraction portion support plate 45 with bolts 46.

  The upper member 43 provided at the upper end of the annular contracting portion 41 is formed of a circular annular plate material, and a guide roller 47 made of a rubber material is rotatably supported on the upper surface thereof via a roller receiving member 48. Has been. This guide roller 47 is provided with respect to each bottom plate 35, is in rolling contact with the bottom plate 35 from below, and supports the center side (free end side) of the support shaft 34 from below. When the annular contracting portion 41 contracts, the guide roller 47 is positioned below the support shaft 34, and the bottom plate 35 is configured to maintain a lowered position where the free end side is inclined downward.

  Further, when the annular contraction portion 41 is expanded upward due to the expansion, the guide roller 47 is positioned above the support shaft 34 as shown in FIG. 2, and the bottom plate 35 is positioned at the ascending position where the center side is inclined upward. Is configured to change. The guide roller 47 guides the bottom plate 35 while rolling the bottom plate lower surface when the bottom plate 35 rotates.

  The upper end of the connecting member 44 is connected to the outer peripheral portion of the upper member 43 at equal intervals in the circumferential direction. A rod 49 b of the cylinder 49 is connected to the lower end of each connecting member 44.

  A chucking device 60 is fixed to the cylinder body 49a. That is, as shown in FIGS. 4 and 6 to 9, the chucking device 60 is inserted and held in the support 64 attached to the cylinder body 49 a that moves up and down and the holding portion 64 a provided in the center of the support 64. A cylindrical discharge portion 61, and a clamp portion 63 that moves up and down with respect to the cylindrical discharge portion 61 by an elevating cylinder 62 so as to sandwich and fix the discharge port portion 3a of the bag 3 to the cylindrical discharge portion 61. Prepare.

  The elevating cylinder 62 is vertically attached to a support 64 that holds the cylindrical discharge portion 61, and a bracket 69 is attached to the elevating cylinder 62 so as to be movable up and down. The clamp part 63 is supported horizontally by the bracket 69, and the clamp part 63 is configured to be movable up and down in a horizontal state.

  The clamp part 63 is an annular main body 65 having a U-shaped cross section with an inner peripheral surface opened, an annular tube 66 accommodated in the annular main body 65, and an annular presser part disposed on the upper surface of the annular main body 65. An annular rubber packing 67 and an annular rubber packing pressing plate 68 disposed on the upper surface of the rubber packing 67 are configured. The rubber packing presser plate 68 fastens and fixes the rubber packing 67 to the upper surface of the annular main body 65 from above via bolts 70.

  The inner diameter D1 of the rubber packing 67 is set smaller than the inner diameter D2 of the cylindrical discharge portion 61 as shown in FIG. Further, the inner diameter D3 of the annular main body 65 is set larger than the outer diameter of the cylindrical discharge portion 61 so that the annular main body 65 can be externally fitted to the upper portion of the cylindrical discharge portion 61 from above.

  Therefore, the inner peripheral portion 67 a of the rubber packing 67 protrudes toward the center side over the entire circumference of the cylindrical discharge portion 61 from the inner peripheral surface of the cylindrical discharge portion 61. Thus, since the inner peripheral portion 67a of the rubber packing 67 protrudes toward the center side from the inner peripheral surface of the cylindrical discharge portion 61, the annular main body 65 is fitted into the cylindrical discharge portion 61 as shown in FIG. When combined, the discharge port portion 3a can be bent firmly toward the center side of the inner peripheral surface of the cylindrical discharge portion 61 and firmly held.

  Moreover, as shown in FIG. 1, the sensor 50 for setting the raising position of the bottom plate 35 is provided in the mount frame 11 side (for example, the rear connection member 16a). The sensor 50 detects a detected part 51 provided on a member that moves up and down together with the bottom plate 35 (for example, the support 64 side). Based on the detection signal of the sensor 50, the rising position of the bottom plate 35 can be set. Note that the vertical position of the sensor 50 can be changed, and the operating stroke of the bottom plate 35 can be adjusted by changing the vertical position of the sensor 50.

  A vibration device 70 that vibrates the bottom of the bag is attached to the base frame 32 together with the discharge promoting device 30.

  The granular material discharge apparatus 1 concerning this Embodiment consists of the above structure, and demonstrates operation | movement of this apparatus 1 next.

  First, the upper part of the bag 3 in which powder particles such as salt are accommodated is suspended and set on the hanger part 21 provided on the upper part of the apparatus main body 10. At this time, the height of the bag 3 is adjusted to such an extent that the lower part of the bag 3 is brought into contact with or placed on the bottom plate 35 in the lowered position (the degree that the weight of the granular material acts on the bottom plate 35). Further, the midway part of the discharge port part 3a is closed by a closing tool 3b such as a string or a belt.

  Further, the discharge port 3 a provided at the lower part of the bag 3 is chucked by the chucking device 60. Specifically, the discharge port portion 3 a is inserted into the opening 36 of the bottom plate 35, the opening portion 41 a of the annular contraction portion 41, and the clamp portion 63, and the lower portion of the mouth portion 3 a is covered with the cylindrical discharge portion 61. At this time, the cylinder main body 49a and the chucking device 60 are raised, and the clamp part 63 is also in the standby position raised with respect to the cylindrical discharge part 61 (see FIGS. 1 and 8).

  Further, when the elevating cylinder 62 is operated, the clamp part 63 at the standby position is lowered. The inner peripheral part 67a of the rubber packing 67 of the clamp part 63 is pressed and clamped on the upper surface of the cylindrical discharge part 61 so that the discharge port part 3a is folded from the outside to the inside. In addition, when compressed air is supplied to the tube 66, the tube 66 expands in the inner diameter direction, so that the discharge port portion 3 a is pressed against the outer peripheral surface of the cylindrical discharge portion 61 and is sandwiched between the cylindrical discharge portions 61. (See FIG. 9). Thereby, chucking is completed, and the discharge port portion 3a and the cylindrical discharge portion 61 are connected.

  When the chucking is completed, the chucking device 60 is lowered to a predetermined height by releasing the closing body 3b such as the outlet string and extending the rod 49b of the cylinder 49 (see FIG. 10A). Thus, the slack of the discharge port portion 3a can be prevented by lowering the chucking device 60 to a predetermined height.

  Next, the particulate discharge operation is started. Specifically, when air is press-fitted into the annular contracting portion 41 of the air lifter 40 and the air lifter 40 is lifted, the bottom plates 35 rotate simultaneously around the support shaft 34 with the free end side above the support shaft 34. Move. By rotating the bottom plate 35 upward, the granular material at the center of the bottom of the bag 3 is lifted and moved from below toward the outer peripheral direction (see FIGS. 2 and 10B).

  Further, when the air in the annular contraction part 41 is discharged, the bottom plate 35 is rotated downward due to the weight of the bottom plate 35 and the granular material (see FIG. 3). The powder particles easily flow into the central cylindrical discharge portion 61 along the bottom plate 35 that returns and slopes downward. Thus, by the vertical movement of the bottom plate 35, the solidified granular material can be effectively crushed or broken in the bag 3 and activated, and the granular material can be discharged smoothly. it can. The chucking device 60 also moves up and down in conjunction with the vertical movement of the bottom plate 35.

  Further, as shown in FIG. 9, the discharge port portion 3 a is folded at the center side of the cylindrical discharge portion 61 from the inner peripheral portion 67 a of the rubber packing 67 rather than the inner peripheral surface of the cylindrical discharge portion 61. The granular material does not enter between the discharge port portion 3 a and the cylindrical discharge portion 61.

  Further, since the discharge port portion 3a is covered with the cylindrical discharge portion 61 and connected to the cylindrical discharge portion 61 via the rubber packing 67 and the tube 66, the discharge port portion 3a, the cylindrical discharge portion 61, In this case, the powder particles passing through the cylindrical discharge portion 61 from the discharge port portion 3a are not dusted and inadvertently scattered.

  Moreover, since the discharge port portion 3a is configured to cover the cylindrical discharge portion 61 and to be connected to the cylindrical discharge portion 61 via the rubber packing 67 and the tube 66, the diameter of the cylindrical discharge portion 61 is different. Even in this case, as described above, the rubber packing 67 prevents the powder particles from entering between the discharge port portion 3a and the cylindrical discharge portion 61, and the cylindrical discharge due to the elastic force in the diameter direction of the tube 66. The difference in the diameter of the part 61 can be absorbed and reliably chucked.

  The operating speed and stroke of the bottom plate 35 can be set as appropriate according to the material of the powder and the solidified state. The operation mode according to the state of the powder and granular material can be set, and the bottom plate can be moved up and down at a fixed position to break up or break up the powder particle and discharge it. The operation mode is, for example, operating in the long stroke mode of the bottom plate 35, and the bottom plate 35 is slowly moved up and down. In this long stroke mode operation, the bottom plate 35 is rotated at the normal speed according to the material of the granular material, the solidified state, and the like, with the position of the ascending position and the descending position of the bottom plate 35 set by the sensor 50. It is a driving to move.

  Further, a circulation mode in which a long stroke operation and a short stroke jogging operation are combined is also possible. That is, the short stroke jogging operation is an operation in which the bottom plate 35 is rotated at a speed shorter than the long stroke between the rising position and the lowering position of the bottom plate 35 set by the sensor 50 and faster than the long stroke. It is.

  Such a circulation mode that combines a long stroke operation and a short stroke jogging operation, for example, performs a plurality of long stroke operations, then performs a short stroke jogging operation, and then performs a long stroke from the raised position of the bottom plate 35. The bottom plate 35 is slowly lowered at a speed slower than the operation. By slowly lowering the bottom plate 35 in this way, it is possible to smoothly discharge the powder that has been crushed or unraveled by the rotation of the bottom plate 35.

  Moreover, since air is press-fitted into the annular contraction portion 41 of the air lifter 40 and the air lifter 40 is lifted, a strong rising pressure of the air lifter 40 is obtained, and the bottom is resisted against the weight of the granular material. The plate 35 can be reliably raised.

  Although the internal volume decreases with the discharge of the powder, the bag 3 becomes thinner with the decrease of the powder and becomes longer in the vertical direction. Accordingly, the cylinder 17 at the upper end of the gantry 11 is operated so that the bottom of the bag 3 can be constantly pushed up, and the top member 20 is adjusted upward by the length of the bag 3. As a result, since the optimum weight of the bag 3 acts on the bottom plate 35, stable discharge becomes possible.

  When the discharge of the powder is completed, the opposite process is performed. That is, the bottom plate 35 is lowered and the chucking device 60 is raised. Further, the air in the tube 66 is discharged, the clamp part 63 is raised, and the chucking of the discharge port part 3a is released. Thus, when the discharge part 3a is lifted and the discharge port part 3a is removed from the cylindrical discharge part 61 after the discharge operation is finished, the granular material is interposed between the discharge port part 3a and the cylindrical discharge part 61. Since it does not remain, such a granular material is not scattered as dust and does not contaminate the floor surface.

  The present invention is not limited to the embodiment described above. For example, in the above-described embodiment, the annular pressing portion (rubber packing 67) and the annular main body 65 are configured as separate members, but may be integrally formed with a synthetic resin.

  The actuating the bottom plate 35 means to eliminate or break the solidified state of the granular material, by lifting the center part of the bag from the side from below the bag, The operation is performed so that force acts in a direction (for example, upward and radial) in which the granular material in the bag is moved upward and laterally from the center side.

It is a whole front view of the granular material discharge apparatus which shows one embodiment of this invention. It is the whole front view of the state which operated the bottom plate of the granular material discharge device upwards. It is the whole front view of the state which operated the bottom plate of the granular material discharge device below. It is a cross-sectional front view which shows the principal part of the same granular material discharge apparatus. It is a top view including the partial cross section which shows the principal part of the granular material discharge apparatus. It is a front view containing the partial cross section which shows the chucking apparatus of the same granular material discharge | emission apparatus. It is a top view which shows the chucking apparatus of the same granular material discharge | emission apparatus. It is sectional drawing of the state which showed the principal part of the chucking apparatus of the same granular material discharge | emission apparatus, and the clamp part raised. It is sectional drawing of the state which showed the principal part of the chucking apparatus of the same granular material discharge | emission apparatus, and the clamp part fell. The operation | movement of the bottom plate of the same granular material discharge | emission apparatus is shown, (a) is a schematic sectional drawing which shows the descent position of a bottom plate, (b) is a schematic sectional drawing which shows the raising position of a bottom plate. It is a top view of the conventional clamp. It is principal part sectional drawing which shows a prior art example.

Explanation of symbols

1 Pulverizer 3 Flexible container bag (bag)
3a Discharge port 10 Device body 11 Base 20 Top member 30 Discharge promotion device 35 Bottom plate 40 Air lifter (actuating means)
41 Annular contraction part 60 Chucking device 61 Cylindrical discharge part 62 Elevating cylinder 63 Clamp part 65 Annular body 66 Tube 67 Rubber packing (annular retainer part)
67a Inner circumference 68 Rubber packing holding plate

Claims (1)

A device main body for suspending a bag in which a granular material is stored and a discharge port portion for the granular material is formed, and a cylindrical discharge in which the discharge port portion of the granular material is covered to discharge the granular material And a granular material discharging device comprising a clamp part that detachably attaches a discharge port of the granular material to the cylindrical discharge part,
The clamp part is located above the cylindrical discharge part and is provided so as to be movable up and down with respect to the cylindrical discharge part. In addition, the clamp part expands in the inner diameter direction by fluid pressure or contracts by discharging the fluid. An annular tube, and an annular presser portion having an inner peripheral portion that protrudes closer to the center than the inner peripheral surface of the cylindrical discharge portion,
When the clamp part is lowered, the inner peripheral part of the annular pressing part bends the discharge port part of the granular material to the center side with respect to the inner peripheral surface of the cylindrical discharge part and presses it to the upper surface of the cylindrical discharge part. And the expanded tube presses the discharge port part of the granular material fitted by the cylindrical discharge part to the outer peripheral surface of a cylindrical discharge part, The granular material discharge apparatus from the bag characterized by the above-mentioned.

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