JPH0647221U - Combination of vibrator and screw used for powder measurement - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] A vibratory motion is applied to a conveyor cylinder to discharge a very small amount of powder to meet minute requirements. A conveyor device (10) used in a weighing device for powder during transportation, which comprises a conveyor cylinder (42) vibrated by a vibrator (62) for fine control of powder discharged from the conveyor cylinder (42). Inside the conveyor cylinder 42, the shaft 5 with the first and second blade segments 52, 54 being driven in rotation.
Since there is 0, the powder enters from the loading hopper 20 and exits to the outside. The oscillating movement of the conveyor cylinder 42 is independent of the rotational movement of the shaft 50, and either or both the conveyor cylinder 42 and the shaft 50 are selected to function to meter a desired amount of powder. That is, in the case of a very small amount, the vibrator 62 functions, and in the case of a large amount, both the vibrator 62 and the shaft 50 operate.

Description

[Detailed description of the device]

The present invention relates generally to powder weighing devices. More particularly, the present invention relates to a vibrator and screw combination conveyor for a metering device for finely grinding powders, eg pharmaceutical powders. The vibrator in this combination conveyor is incorporated in this conveyor to perform a vibrating transfer operation in spite of the normal transfer operation by the drive shaft with spiral blades, so that powders of various weights in a wide range can be used. In particular, a very small amount of powder can be discharged from the conveyor of the present invention.

[0002]

[Prior art]

 Conventional conveyors or conveyors used in metering devices are not suitable for discharging very small amounts of powder due to the rotational movement of shafts or shafts with helical blades. That is, it is not only difficult to finely control the number of rotations of the shaft, but it is also difficult to measure or control the amount of powder discharged by one rotation of the shaft. As is well known, shafts with helical blades, which are generally referred to as screws and have an auger-like appearance, are commonly used to expel powder by rotating the shaft about its axis. Is provided in the hollow cylinder.

When the shaft rotates at a predetermined rotation speed, the amount of powder discharged is determined according to the outer diameter of the blade. More than two sets of cylinders and augers of different sizes are needed to eject different amounts of powder. For example, for very fine weighing on the order of 0.01 grams, it is necessary to install a cylinder and auger of very small size. However, the amount of powder discharged by one rotation of the shaft cannot solve the problem that the column of powder suddenly collapses and is difficult to predict.

[Problems to be solved by the device]

Another problem with prior art conveyor systems is that of "viscous" powders and coarse powders, which are harmful to the blades and cylinder walls and stick to them. It solidifies and solidifies, which disturbs the rotation of the shaft. In other words, since the thrust or pressing force of the blades obtained by the simple rotational movement of the shaft is sufficient, it cannot prevent the powder from damaging the conveyor device.

It is necessary to finely control the amount of powder during transportation so as to conform to a fine allowable range, and from a practical viewpoint, it is necessary to measure a wide range of various amounts with a single device. Also, such delivery devices need to be able to handle "viscous" powders or very coarse powders as reliably as regular powders.

[0006]

[Means for Solving the Problems]

 Therefore, it is an object of the present invention to provide an oscillating transfer device that imparts an oscillating motion to a conveyor cylinder, so that a very small amount of powder can be discharged to meet fine requirements. Another object of the present invention is to use an oscillatory motion of a conveyor cylinder, a rotary motion of a shaft with blades, or both to generate an extremely small amount of powder, a medium amount of powder, and a large amount of powder, respectively. An object is to provide a vibrating and conveying device capable of discharging a quantity of powder that can be weighed and can be changed in an extremely wide range.

Yet another object of the present invention is to provide a vibrating transfer device which can avoid the accumulation phenomenon and thus can reliably handle "viscous" powders and coarse powders. Although not described in the present specification, each of the above objects will be readily apparent to those skilled in the art from the following detailed description with reference to the accompanying drawings.

[0008]

【Example】

 Referring to the attached drawings, in particular, FIGS. 1 to 3 show a large number of vibration carrying devices of the present invention, each of which is provided at the lower end of the corresponding loading hopper 20 arranged side by side. It is installed. A vibrating transfer device, generally designated by reference numeral 10, comprises a support means secured to the loading hopper 20 on two opposite sides, a chamber means movably carried by the support means, and a combination of shafts and vanes. It includes drive means for discharging the powder, and vibrator means fixedly supported on the chamber means for discharging the powder by applying vibration to the chamber means.

The chamber means comprises a hollow cylinder 42 having a chamber 422 (see FIGS. 4-6) having an inlet communicating with the loading hopper 20 and an outlet communicating with the outside for discharging powder. A carrying element 44 fixed to the bottom of the cylinder 42. As best shown in FIGS. 2 and 3, the support means is substantially a first bearing element 32 for piercing the first bearing element 32 and securing the element 32 to the loading hopper 20. A pair of connecting rods 36, a pair of support rods 38 (only one shown) for elastically or movably supporting the carrying element 44 of the chamber means, and a hollow cylinder 42 for the chamber means. Includes two bearing elements 34.

The first bearing element 32 has a carrying side 322 for fitting and mounting on the side flange 22 of the loading hopper 20, and an outer side 324 for contacting the inner wall of the hollow cylinder 42. The second bearing element 34 has the outer wall 426 of the hollow cylinder 42, the connecting rod 36 and a plurality of holes 344 corresponding to the support rod 38, and the second bearing element 34 uses nuts and bolts to form the rods 36. And 38 have an inner side 342 adapted to be removably carried. A carrying element 44 of the chamber means fixed to the hollow cylinder 42 is slidably carried on a pair of supporting rods 38 of the supporting means so that this chamber means is carried in a movable manner relative to the supporting means. .

As mentioned above, and as shown in FIG. 3, the support means are secured to the loading hopper 20 at two opposite sides. The components shown on the left side of FIG. 3 do not form a part of the present invention, and thus it is considered that detailed explanation is not necessary. However, these components are briefly described in connection with the drive means description below. The drive means for conveying the powder from the loading hopper 20 to the hollow cylinder 42 and then discharging the powder to the outside includes a shaft 50 and blades on the shaft. This shaft extends to the other side of the loading hopper 20. On this side, the shaft is rotatably supported on the support means in a known manner, for example by bearings. A gear may be provided at the end of the shaft 50 so that the drive means can rotate relative to the support means.

The vane comprises a first helical vane segment 52 and a second helical vane segment 54. Vane segment 52 extends from near the center of hollow cylinder 42 to near loading hopper 20 and vane segment 54 extends from the center of cylinder 42 to near the free end of shaft 50. Thus, the vane segment 52 introduces the powder from the loading hopper 20 through the inlet of the cylinder 42 to near the center of the cylinder 42. At this time, the blade segment 54 continues to send the powder to the outlet of the cylinder 42. It goes without saying that the second helical blades 54 have a group of helical blades that are closer to each other than the first helical blades 52. As a result, the second blade segment 54 conveys the powder at a higher speed than the first blade segment 52, which prevents the powder from accumulating and clumping at the outlet of the cylinder 42. Thus, the normal transport function of the conveyor device is maintained. Also, as is apparent from the above, the outer diameters of the first and second helical blade segments 52 and 54 are smaller than the inner diameter of the hollow cylinder 42. The inner diameter of the cylinder will be described in more detail later.

Since the vibrator means are fixed to the bottom of the carrying element 44 of the chamber means, these chamber means and vibrator means form a unit carried in movable relation to the carrying means. . The vibrator 62 of the vibrator means may be of any type capable of functioning to impart oscillatory motion to the cylinder 42. Thus, the powder is pressed into the cylinder 42 and moves from the inlet to the outlet of the cylinder 42. As a result, the vibrator means also conveys and discharges the powder despite the actuation of the shaft 50 of the drive means. Preferably, the vibrator 62 is located in a direction away from the loading hopper 20, and as shown in FIG. 3, it reliably transports the powder in the cylinder 42 and discharges it, so that the longitudinal axis of the cylinder 42 can be discharged. It is tilted about 60 degrees. Furthermore, since the vibrator means is carried near the outlet of the cylinder 42, an arm with a large moment with respect to the carrying position between the first bearing element 32 of the support means and the cylinder 42 is obtained.

In order to reliably vibrate the cylinder 42, a holding means is provided on each of the pair of support rods 38. Preferably, this retaining means comprises a first spring 70 and a second spring 72 on opposite sides of the carrying element 44. These first and second springs 70 and 72 hold the carrying element 44 and thus the chamber means in their respective initial positions.

[0015]

[Effect of device]

 4 to 6 showing the amount of powder discharged from the cylinder in various modes of operation of the conveyor apparatus of the present invention, FIG. 6 shows the cylinder 42 exposed to an oscillating motion. 5 shows the powder that moves outward due to the rotational movement of the shaft 50, and FIG. 4 shows both the vibration action and the rotation action used to convey the powder. In these three figures it is clearly shown that the size of the first helical vane segment 52 and the second helical vane segment 54 is such that their outer diameter is smaller than the inner diameter of the hollow cylinder 42. ing. Furthermore, it can be seen that there is a space formed between the vane segments 52 and 54 and the cylinder wall, so that the powder is vibrated and the powder easily flows. Each actuation shown in these figures is obvious and will not be described in detail here. However, as is apparent, the vibrating action of the cylinder 42 is obtained, so that the powder is transported in a larger amount and more reliably than in the case of only the rotating action of the shaft 50 and the functions of the vanes 52 and 54 according to the present invention. Although the present invention has been described in connection with the preferred embodiments, it should be understood that various modifications will be apparent to those skilled in the art by reading this specification. Therefore, please note that all such modifications of the invention disclosed herein are within the scope of the claims.

[Brief description of drawings]

1 is a perspective view showing a row of a vibrating and conveying device according to the present invention, which is carried on the lower end of an individual loading hopper.

2 is a partially exploded view of one of the vibrating and conveying devices shown in FIG. 1, a portion of which is cut open and removed for clarity.

FIG. 3 is an axial cross-sectional view showing the vibrating transfer device shown in FIG. 2.

FIG. 4 is a view similar to FIG. 6, showing a large amount of powder ejected from a conveyor cylinder under the combined action of vibration and rotation.

FIG. 5 is a view similar to FIG. 6, showing a medium amount of powder ejected from a conveyor cylinder by the rotational movement of a bladed shaft.

FIG. 6 is an enlarged view of FIG. 3, showing a very small amount of powder being discharged from the conveyor cylinder undergoing vibrational action.

[Explanation of Codes] 10 Vibration Conveying Device 20 Loading Hopper 32 First Bearing Element 34 Second Bearing Element 42 Hollow Cylinder 44 Carrying Element 50 Shaft 52 First Helical Blade Segment 54 Second Helical Blade Segment 62 Vibrator 70 First Spring 72 Second 2 spring 422 chamber

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[Procedure amendment]

[Submission date] August 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Title of device] Combination of vibrator and screw used for powder measurement

Claims (9)

[Scope of utility model registration request] 1. A chamber elastically supported on a supporting means, the supporting means being fixed to be carried on the lower side of a loading hopper, and a carrying element elastically supported on the supporting means. Drive means for conveying powder from the inlet of the chamber to the outlet of the chamber, to the outlet, supported in a fixed relationship with the chamber means with respect to the supporting means so as to exert an oscillating action Vibrating means, the chamber means defining a chamber having an inlet and an outlet, the inlet opening to the loading hopper for receiving powder from the loading hopper, and the outlet to the outside for discharging the powder. Open, the drive means is faster at a speed closer to the outlet of the chamber than at a position closer to the inlet of the chamber, A conveyor device for conveying an object in the chamber, and thus the powder in the chamber moves from the inlet to the outlet even if the powder is conveyed by the drive means, and is used for weighing the powder. 2. A first bearing element having a carrying side adapted to mate with a side flange of a corresponding loading hopper and an outer side adapted to abut an inner wall of the chamber near the inlet. A plurality of connecting rods for fixing the first bearing element to the loading hopper, a pair of support rods for elastically supporting the carrying element of the chamber means, and to cover the outside of the chamber near the outlet. 2. A conveyor according to claim 1, wherein said support means comprises a second bearing element with an inner side made in this way, said second bearing element being removably carried on the respective end of each connecting rod. device. 3. A pair of first sealings carried on the outer side of the first bearing element and the chamber means are movably supported on the first and second bearing elements. The conveyor device of claim 2, further comprising a second seal ring carried on the inner side of the bearing element. 4. The conveyor device of claim 2, further comprising retaining means on the support rod to limit vibrational action of the carrying element of the chamber means on the support rod. 5. The conveyor device of claim 4, wherein the retaining means includes first and second springs on opposite sides of the carrying element. 6. The chamber means comprises a hollow cylinder fixedly supported on the top of the carrying element, the drive means comprising a shaft rotatably supported relative to a loading hopper, and generally the hollow cylinder. A first spiral vane segment extending substantially from the central portion into the loading hopper; and a second spiral vane segment extending substantially from the central portion to the outer free end of the shaft, the first and second The conveyor device of claim 1, wherein the outer diameter of the helical or spiral vane segment is smaller than the inner diameter of the hollow cylinder. 7. The conveyor device of claim 6, wherein the second helical vane segment includes helical vanes spaced less closely than the first helical vane segment. 8. The vibrator means includes a mechanical vibrator fixed to the bottom of the carrying emerent of the chamber means, the vibrator being positioned to oscillate in a direction away from the loading hopper and to be hollow. 7. Conveyor device according to claim 6, characterized in that it tilts about 60 degrees with respect to the longitudinal axis of the cylinder, so that when the hollow cylinder vibrates, the powder inside is discharged from the outlet of the chamber means. 9. The conveyor device of claim 8, wherein the carrying element is located on the support rod such that the vibratory force of the vibrator has a moment arm of at least half the axial length of the cylinder.