JPH0622434Y2 - Granular material quantitative supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a powder and granular material quantitative supply device for quantitatively supplying powder and granular materials such as shells, medicines and the like.

(Prior Art) As a conventional powder and granular material supply device, for example, as shown in FIG.
The granular material is cut out from the hopper 62 to the supply pipe 64 by the rotary valve 63, and the supply pipe 64 is cut by the blower 65.
There is a supply device having a structure in which the air for transportation is blown and the granular material is sprayed from the tip of the supply pipe 64. Hopper 6
A brush 67, which is driven to rotate by an electric motor 66, is provided inside the unit 2, and is configured to scrape off the powder particles attached to the inner surface of the hopper 62.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional feeder, since the rotary valve 63 cuts out the powder or granular material in the hopper 62, the cut-out amount cannot be made very small and the predetermined amount cannot be obtained. Since the powder or granular material is supplied in a short time, it cannot be used for the purpose of supplying the powder or granular material little by little for a long time. Further, since the rotary valve 63 is used, cutting out becomes difficult when the powder in the hopper 62 gets wet. Especially, in the case of fine powder having a particle size of about 70 μm or less,
Supply is impossible.

Therefore, the applicant of the present invention, as shown in FIG.
The powder or granules therein are dropped and filled into the through hole 75 of the rotary disk 74 from the cutout 73 formed in the bottom wall 71a of the storage tank 71 by the rotation of the stirring blade 72, and the powder or granules are rotated by the rotation of the rotary disk 74. Has already proposed a powder and granular material quantitative supply device for transporting the powder and granular material support 76 to the air flow supply hole 77 and supplying it to the transport pipe 78 that constitutes the transport flow path (see Japanese Patent Application No. 63-81082). ). In FIG. 5, 7
Reference numeral 9 denotes an electric motor that drives the stirring blade 72 and the rotary disk 74.

However, in this device, since a predetermined clearance is provided between the lower end of the stirring blade 72 and the bottom wall 71a of the storage tank 71, the force for pushing the powder or granular material into the through hole 75 of the rotary disk 74 from the cutout portion 73 is required. Not enough, especially when the remaining amount of powder or granular material in the storage tank 71 becomes small, the through hole 7
Since the amount of the powder or granules filled in 5 decreases, the supply amount of the powder or granules per unit time changes.

(Means for Solving the Problems) In order to solve the above problems, a powdered and granular material supply device according to the present invention is provided with a storage tank for storing powdered and granular materials, and a drive device arranged near the bottom surface of the storage tank. And a rotary blade that is driven by an agitator to stir the powder and granules, and a rotary blade that is arranged in the vicinity of the lower surface of the storage tank so as to partially project radially outward from the outer periphery of the storage tank and is driven by a drive device. A disk and a powder / granular material support body disposed all around the lower surface of the outer peripheral portion of the rotary disk are provided, and the stirring blade is rotatably driven by the drive device, and an outer periphery of the rotary body. And a movable plate which is supported by the support member via an elastic body and whose lower end is pressed against the bottom wall of the storage tank and the upper surface of the rotary disk by the urging force of the elastic body. A plurality of through holes are formed on the outer circumference of the rotary disc at appropriate intervals on at least one circumference, and arc-shaped notches located above the rotary disc on the bottom wall of the storage tank. And the powdery or granular material support can be communicated with at least one of the through-holes of the through-hole of the rotary disk, which is located in a portion protruding outward in the radial direction from the outer periphery of the storage tank. A simple air flow supply hole is formed, and this air flow supply hole is positioned inside the air flow transport channel,
The powder in the storage tank is filled into the through hole of the rotary disk from the cutout portion of the bottom wall of the storage tank by rotating the stirring blade, and the powder or granular material is supported by rotating the rotary disk. The upper part is conveyed to the air flow supply hole and is supplied to the transportation flow path.

(Function) The particles in the storage tank fall into the through hole of the rotary disc from the notch in the bottom wall of the storage tank by the rotation of the stirring blade, and by the rotation of the rotary disk, up to the air supply hole on the powder support. It is transported and supplied to the transportation channel. At this time,
Since the lower end of the movable plate is pressed against the upper surface of the rotary disc by the urging force of the elastic body, a fixed amount of powder is always passed through the rotary disc by the movable plate regardless of the amount of powder in the storage tank. Is pushed into.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a cross-sectional view of a powder and granular material quantitative supply device according to an embodiment of the present invention. The powder and granular material quantitative supply device includes a storage tank 1 for storing powder and granular materials, and a controller (not shown). Controlled by. Further, an air flow for conveying the granular material is supplied from a compressed air supply source (not shown), and a transportation pipe 2 constituting a transportation flow path for conveying the granular material by the air current is connected. Reference numeral 4 denotes a base, and an electric motor 6 capable of speed control as a drive device is mounted on the base 4 via a bracket 5.
Is installed. AC power is supplied to the electric motor 6 from the control device, and the speed is controlled by changing the frequency of the AC power, for example. A cylindrical sleeve 7 is placed on the upper surface of the base 4, and a disc-shaped casing 8 is placed on the sleeve 7. The lower end inner circumference of the sleeve 7 is engaged with the step portion 4a on the upper surface of the base 4, and the upper end inner circumference is engaged with the step portion 8a on the lower surface of the casing 8, so that the relative movement in the horizontal direction is restricted. On the upper surface of the casing 8, a cylindrical storage tank 1 having a bottom wall 1a and an annular flange 10 that fits on the outer circumference of the lower end of the storage tank 1 are placed. It engages with the step portion 1b at the lower end of the outer periphery of the tank 1 in the vertical direction. On the upper surface of the base 4, the lower ends of a plurality of brackets 11 whose upper ends are opposed to the outer periphery of the annular flange 10 with appropriate intervals are fixed, and the toggle clamps 12 are provided on the respective brackets 11.
Is installed. The toggle clamp 12 can be opened and closed by manually operating the handle, and in the closed state, pushes the upper surface of the annular flange 10 downward. As a result, the storage tank 1, the casing 8, and the sleeve 7 are pressed toward the upper surface of the base 4, and the movement in the vertical direction is restricted. An O-ring 13 that is in contact with the lower surface of the annular flange 10 is attached to the annular recess formed on the upper surface of the casing 8. An annular flange 14 is provided on the outer periphery of the upper end of the storage tank 1.
Is fitted to the annular flange 14, and the hinge 15
The lid 16 that closes the upper end of the storage tank 1 is attached so as to be openable and closable. A toggle clamp 17 is attached to the annular flange 14 at a position opposite to the hinge 15.
The toggle clamp 17 can be opened and closed by manually operating the handle, and in the closed state, pushes the upper surface of the lid 16 downward. As a result, the lid 16 is pressed against the upper end of the storage tank 1 and the lid 16 is locked. An O-ring 18 that abuts the lower surface of the lid 16 is attached to the annular recess formed on the upper surface of the annular flange 14. Inside the storage tank 1, a stirring blade 20 is arranged near the bottom wall 1a,
The stirring blade 20 is fixed to the upper end of a rotary shaft 23 rotatably supported by a plurality of bearings 22 in a housing 21 fixed to the lower surface of the casing 8. Rotating shaft 2
A coupling 24 is attached to the lower end of the rotating shaft 23, and the rotary shaft 23 is connected to the output shaft 6 of the electric motor 6 by the coupling 24.
It is connected to a. A disc-shaped rotary disc 26 is arranged in a circular recess formed on the upper face of the casing 8. The upper face of the rotary disc 26 is
It closely faces the lower surface of the bottom wall 1 a of the storage tank 1, and a part thereof projects radially outward from the outer periphery of the storage tank 1. The rotary disk 26 is fixed to the upper end of a rotary shaft 29 rotatably supported by a plurality of bearings 28 in a housing 27 fixed to the lower surface of the casing 8. A gear 30 is fixed to the outer circumference of the lower end of the rotary shaft 29, and the gear 30 meshes with a gear 31 fixed to the outer circumference of the rotary shaft 23.

As shown in detail in FIG. 2, the rotary disc 26 has a large number of through holes 33 formed at equal intervals in the circumferential direction in the outer peripheral portion thereof, and the rotary disc 26 is provided on the bottom wall 1 a of the storage tank 1. Arcuate notch 3 in the portion located above
4 are formed. The stirring blade 20 shown in FIG.
Indicates only the rotating body 41.

The casing 8 has an air flow supply hole 3 that can communicate with one through hole 33 at a position radially outside the outer circumference of the storage tank 1.
5 is formed. The annular flange 10 is formed with a hole 36 having the same diameter and the same axis as the air flow supply hole 35, and the air flow is supplied from the compressed air supply source to the air flow supply hole 35. On the annular flange 10, there is rotatably installed a disc-shaped rotary plate 37 that is reciprocally driven by a drive device (not shown) controlled by a control device. A plurality (two in this embodiment) of holes 38 are formed at equal intervals in the circumferential direction. The transport pipe 2 is in the hole 38.
Are connected to each other, and one of the holes 38 communicates with the hole 36 by the rotation of the rotary plate 37. The annular flange 10
An O-ring 39 that contacts the lower surface of the rotary plate 37 is mounted in an annular recess formed on the upper surface of the O-ring 39. The O-ring 39 is arranged so as to surround the holes 36 and 38. The stirring blade 20 includes a conical rotating body 41 fixed to the upper end of the rotating shaft 23, and a plurality of plate-shaped supporting members 42 fixed to the outer circumference of the lower end of the rotating body 41 at equal intervals in the circumferential direction. ,
It is constituted by a movable plate 44 having a substantially V-shaped cross section attached to each support member 42 via an elastic body 43 made of, for example, a sponge, and the lower end of the movable plate 44 contacts the bottom wall 1a of the storage tank 1. ing.

That is, as shown in FIG. 3, the movable plate 44 is urged by the urging force of the elastic body 43 so that the lower end of the movable plate 44 is directed in the rotation direction of the stirring blade 20 indicated by the arrow. 1 is pressed against the bottom wall 1a. The movable plate 4
When 4 is located in the notch 34 formed in the bottom wall 1 a of the storage tank 1, the lower end of the movable plate 44 is pressed against the upper surface of the rotary disk 26 by the urging force of the elastic body 43.
That is, the notch 34 is formed on the outer peripheral portion of the bottom wall 1a of the storage tank 1 concentrically with the bottom wall 1a over a predetermined angle, and the width in the radial direction is just fitted at the lower end of the movable plate 44 of the stirring blade 20. It is about the length. The stirring blade 20 in FIG. 4 omits the rotor 41.

Next, the operation will be described. When the electric motor 6 is driven by the control device, the stirring blade 20 rotates via the output shaft 6a, the coupling 24, and the rotating shaft 23, the powder particles in the storage tank 1 are stirred, and the notch of the bottom wall 1a is formed. It falls from the portion 34 into the plurality of through holes 33 of the rotary disk 26. At this time, the movable plate 4 of the stirring blade 20 is urged by the urging force of the elastic body 43.
Since the lower end of 4 is urged in the rotating direction of the stirring blade 20 and pressed against the upper surface of the rotary disk 26, the storage tank 1
The movable plate 44 reliably pushes a certain amount of powder or granular material into the through hole 33 regardless of the amount of powder or granular material inside. Since the lower end of the through hole 33 closely faces the casing 8, the artificial mixed feed is supported by the casing 8 and filled in the through hole 33. That is, in this embodiment, the casing 8 functions as a powder / particle support. On the other hand, the power of the electric motor 6 is transmitted to the rotary disc 26 via the output shaft 6a, the coupling 24, the rotary shaft 23, the gear 31, the gear 30 and the rotary shaft 29, and the rotary disc 2
6 rotates. As a result, the powder or granular material filled in the through hole 33 moves on the casing 8 integrally with the through hole 33 toward the air flow supply hole 35, and the new through hole 33 is filled with the powder or granular material. When the rotary disk 26 rotates by a predetermined angle, the through hole 33 filled with the powder or granular material reaches the position of the air flow supply hole 35 of the casing 8. Here, since the air flow for conveyance is upwardly supplied from the compressed air supply source to the air flow supply hole 35, the powder or granular material filled in the through hole 33 passes through the holes 36 and 38 by the air flow. It flows into one of the transport pipes 2. In this way, a predetermined amount of powder or granular material is supplied to one of the transport pipes 2 and is transported to a predetermined place by the air flow. Since the amount of powder or granular material supplied to the transport pipe 2 per unit time is determined by the volume and pitch of the through holes 33 and the rotation speed of the rotary disk 26, the volume and pitch of the through holes 33 are By selecting appropriately,
It is possible to quantitatively supply a small amount of powder and granules.
The supply amount can be varied over a wide range by varying the rotation speed of the rotary disk 26 by varying the frequency of the AC power source supplied to the.

Next, the rotating plate 37 is moved in the positive direction by a command from the control device.
When it is driven to rotate by 180 degrees, the other transport pipe 2 communicates with the air flow supply hole 35, and a predetermined amount of powder or granular material is supplied to a predetermined place different from the transport place by the one transport pipe 2. Further, when the rotary plate 37 is driven to rotate in the opposite direction by 180 degrees, it goes without saying that one of the transport pipes 2 again transports the granular material.

In this way, the stirring blade 20 is connected to the rotor 41 and the support member 42.
Since the elastic body 43 and the movable plate 44 are used, the through-hole 33 of the rotary disk 26 can always be filled with a fixed amount of the granular material regardless of the amount of the granular material in the storage tank 1. The amount supplied per hour can be constantly maintained. Further, as in the present embodiment, if the rotating plate 37 is provided and the powder particles are selectively supplied to the plurality of transport pipes 2,
It is very convenient because powder and granular materials can be supplied to a plurality of different places with one powder and granular material quantitative supply device.

(Other Embodiments) In the above embodiments, the sponge is used as the elastic body 43, but the present invention is not limited to such a configuration, and for example, a coil spring or the like may be used as the elastic body 43. .

Further, in the above embodiment, the rotary body 41 is fixed to the upper end of the rotary shaft 23, but the present invention is not limited to such a configuration, and the rotary body 41 is formed integrally with the rotary shaft 23, for example. Good.

Further, in the above embodiment, the rotary plate 37 is provided to selectively supply the powdery particles to the plurality of transport pipes 2, but the present invention is not limited to such a configuration, and the rotary plate is not limited thereto. Alternatively, the powder or granular material may be supplied to one transport pipe 2 without providing 37.

Further, in the above embodiment, an example in which the stirring blade 20 and the rotary disk 26 are driven by the common electric motor 6 has been described, but these may be driven by separate driving devices.

Further, in the above embodiment, the through holes 33 are provided on the outer circumference of the rotary disk 26 at equal intervals in the circumferential direction and on the same circumference, but the arrangement of the through holes 33 is not limited to this. , A plurality of through holes 33 are provided on two circles having slightly different radii at equal pitches, and the through holes 33 on one circle and the through holes 33 on the other circle are displaced from each other by a half pitch. Then, various modifications can be made such that the through holes 33 are arranged in a zigzag shape as a whole.

Further, in the above-described embodiment, the diameter and position of the air flow supply hole 35 are selected so that only one through hole 33 communicates with the air flow supply hole 35 at the same time, but a plurality of through holes 33 are simultaneously formed in the air flow supply hole 35. The diameter and position of the airflow supply hole 35 may be selected so that they communicate with each other.

In the above embodiment, the power of the electric motor 6 is changed to the gear 3
It was transmitted to the rotary disk 26 by 0, 31,
The power transmission means is not limited to the gears 30 and 31, and other power transmission means such as a belt may be used.

(Effects of the Invention) As described above, according to the powdery granular material supply device of the present invention, the stirring blade is composed of the rotating body, the supporting member, the elastic body and the movable plate, and the movable plate is urged by the elastic body. Since the lower end of the rotary disk is pressed against the upper surface of the rotary disk, a certain amount of powder or granular material can be constantly pushed into the through hole of the rotary disk by the movable plate regardless of the amount of powder or granular material in the storage tank. Therefore, the supply amount per unit time can be always maintained constant.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a powder and granular material quantitative supply device according to an embodiment of the present invention, FIG. 2 is a schematic plan view of the vicinity of a rotary disk in FIG. 1, and FIG. 3 is a front view of a stirring blade in FIG. , FIG. 4 and FIG. 5 are cross-sectional views of a conventional powder and granular material quantitative feeder. 1 ... Storage tank, 1a ... Bottom wall, 2 ... Transport pipe (transport flow path), 6 ... Electric motor (driving device), 8 ... Casing (powder / particle support), 20 ... Stirring blade, 26: rotary disk, 33: through hole, 34: notch, 35
...... Air flow supply hole, 41 ...... Rotating body, 42 ...... Support member,
43 ... elastic body, 44 ... movable plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 61-104065 (JP, U) Shoko 42-17401 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A storage tank for storing powder and granular material, a stirring blade arranged near the bottom surface in the storage tank and driven by a driving device to stir the powder and granular material, and near a lower surface of the storage tank. A rotary disc, which is arranged so that a part thereof protrudes outward in the radial direction from the outer periphery of the storage tank, and is rotationally driven by a drive device, and a granular material disposed around the entire periphery in the vicinity of the lower surface of the outer peripheral portion of the rotary disc. A supporting body is provided, the stirring blade is rotated by the driving device, a rotating member, a supporting member protruding to the outer periphery of the rotating member, and an elastic body supported by the supporting member via an elastic body. A movable plate whose lower end is pressed against the bottom wall of the storage tank and the upper surface of the rotary disc by the urging force of the rotary disc, and a plurality of through holes are formed on the outer periphery of the rotary disc. Formed at appropriate intervals above, on the bottom wall of the storage tank, arc-shaped cutouts located above the rotary disk are formed, and in the powder or granular material support, through holes of the rotary disk An air flow supply hole capable of communicating with at least one of the through holes located in a portion protruding outward in the radial direction from the outer periphery of the storage tank is formed, and the air flow supply hole is provided inside the transportation flow path by the air flow. The powder particles in the storage tank are filled in the through hole of the rotary disk from the notch of the storage tank bottom wall by the rotation of the stirring blade, and the powder particles are rotated by the rotary disk. An apparatus for quantitatively supplying powder and granules, wherein the powder and granular material support is conveyed to the air flow supply hole and supplied to the transportation channel.