JP2012088109A - Powder characteristic measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder characteristic measuring apparatus capable of promptly exhausting powder scattered inside a measuring chamber to an outside so as to prevent the powder scattered inside the measuring chamber from being congested or accumulated inside the measuring chamber.SOLUTION: In a powder characteristic measuring apparatus, an exhaust fan 88 is actuated to form air flow in which external air comes inside a measuring chamber through an air suction opening 57 and an air suction unit 51, passes through a powder dust outlet 53 and an exhaust hose 65 and is discharged to an outside from an exhaust port 65a. With the air flow, powder scattered inside the measuring chamber is discharged to the outside.

Description

  The present invention relates to a powder characteristic measuring apparatus for examining powder characteristics of powders used for industrial use and medicine.

  For example, powders such as powdered drugs measure various properties of powder such as repose angle, collapse angle, spatula angle, etc. In order to measure such powder properties, The powder is dropped from above the chamber onto the powder table to form a powder deposit layer on the powder table, and the inclination angle of the powder deposit layer is measured. Impact vibration is applied to the formed powder deposition layer, and the tilt angle of the powder deposition layer broken by the impact vibration is measured.

JP 2005-308502 A

  As described above, in order to measure various characteristics of the powder such as the angle of repose, the collapse angle, the spatula angle, etc., the powder is dropped onto the powder table from above, and the powder is then placed on the powder table. It is necessary to form a body deposition layer and to apply impact vibration to the powder deposition layer on the formed powder table. When impact vibration is applied to the layer, the powder scatters into the measurement chamber, and there is a problem that the measurement cannot be performed promptly. The scattered powder is not only the bottom of the measurement chamber, but also the measurement members in the measurement chamber, etc. There is a problem of depositing on various parts.

  The present invention has been made in view of the above, and an object of the present invention is to reduce the amount of powder scattered in the measurement chamber to prevent stagnation and accumulation in the measurement chamber. An object of the present invention is to provide a powder characteristic measuring apparatus capable of quickly exhausting outside.

  In order to achieve the above object, the powder characteristic measuring apparatus according to claim 1 is a measuring means which is disposed in the measuring chamber and measures at least an angle of repose, a collapse angle and a spatula angle with respect to a powder deposit layer on the powder table. The measurement chamber is provided on the ceiling portion with an exhaust fan that creates a flow in which at least air from outside enters the room through the indoor upper opening and flows outward from the indoor lower opening. And a powder input port for manually supplying the powder of the measuring means.

  The gist of the powder characteristic measuring apparatus according to claim 2 is that the powder inlet is a detachable port that can be attached to and detached from a supply port of a powder automatic supply unit prepared separately.

  According to the present invention, air from the outside enters the measurement chamber through the indoor upper opening, and an air flow is formed by the exhaust fan toward the outside from the indoor lower opening, and is scattered along with the air flow into the measurement chamber. The powder is discharged to the outside, so that the powder does not stagnate inside the measurement chamber and deposit on various parts such as the bottom of the measurement chamber or the measurement member in the measurement chamber, so that the measurement of the powder deposition layer 7 can be performed. It can be implemented promptly.

1 is a perspective view showing an overall configuration of a powder property measuring apparatus according to an embodiment of the present invention. It is a front view which shows the structure at the time of the collapse angle measurement of the powder characteristic measuring apparatus shown in FIG. It is a side view which shows the structure at the time of the collapse angle measurement of the powder characteristic measuring apparatus shown in FIG. It is a front view which shows the structure at the time of the spatula angle measurement of the powder characteristic measuring apparatus shown in FIG. It is a side view which shows the structure at the time of the spatula angle measurement of the powder characteristic measuring apparatus shown in FIG. It is a figure which shows the structure of the air suction part of the powder characteristic measuring apparatus shown in FIG. 1 thru | or FIG. It is a figure which shows the structure of the dust discharge port of the powder characteristic measuring apparatus shown to FIG. 1 thru | or FIG. It is a figure which shows the structure of the powder automatic supply unit of the powder characteristic measuring apparatus shown in FIG. 1 thru | or FIG. It is a figure which shows the structure of the powder automatic supply unit of the powder characteristic measuring apparatus shown in FIG. 1 thru | or FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 1 is a perspective view showing the overall configuration of a powder property measuring apparatus according to an embodiment of the present invention. 2 and 3 are a front view and a side view of the powder property measuring apparatus shown in FIG. 1, respectively.

  As shown in FIGS. 1 to 3, the powder property measuring apparatus 100 of the present embodiment has a stage 1 projecting at a lower portion with a predetermined thickness, and the rear side of the stage 1 rises upward to form a rear box. Part 3 is formed. Various parts for measuring the characteristics of the powder accumulation layer are provided in a portion sandwiched between the stage 1 and the rear box 3 between the upper surface of the stage 1 and the front of the rear box 3. However, the entire portion is covered with a double-spread transparent acrylic cover 99 indicated by a dotted line so that the powder is not scattered outside during measurement or the like. A plurality of legs 1a are attached to the lower end of the stage 1, and the whole powder characteristic measuring apparatus is supported by the plurality of legs 1a.

  A rectangular flat plate-like bat 5 is provided slightly above the center of the stage 1, and a powder table 9 on which a substantially conical powder deposition layer 7 is placed is provided in the bat 5. As can be seen from FIG. 3, the powder table 9 is placed on one end of a repose angle bar 11 which is a plate-like member. The bat 5 is supported by a lifter 13 that is a support member extending upward from the stage 1 so as to be movable up and down.

  On the stage 1 on the front side of the bat 5, a lower end of a large-diameter cylindrical member 15 is fixedly attached, and on the upper end of the large-diameter cylindrical member 15, a flange member 17 having a raised peripheral edge is attached. The other end of the repose angle bar 11 is mounted on the flange member 17. The upper end of the large-diameter cylindrical member 15 to which the other end of the repose angle bar 11 is attached is connected to the lower end of a small-diameter cylindrical body 21 that is a rod-shaped member. A ring-shaped weight 19 made of is fitted so as to be movable up and down, and this weight 19 is placed on the other end of the repose angle bar 11 mounted on the flange member 17. A cap 23 is attached to the upper end of the cylindrical body 21, and a stopper 25 is attached just below the cap 23.

  A funnel 31 is provided above the powder accumulation layer 7, and powder is supplied from the funnel 31 onto the powder table 9, and the powder accumulation layer 7 is formed on the powder table 9. The funnel 31 is supported by a diaphragm 33 attached to the front surface of the rear box 3, and a plurality of sieves 35 are provided on the funnel 31.

  Further, an automatic powder supply unit 37 is detachably provided above the sieve 35, and the automatic powder supply unit 37 is attached to the uppermost part of the front surface of the rear box 3. When powder is put into the automatic powder supply unit 37, the powder is supplied from the automatic powder supply unit 37 to the lower sieve 35. The powder supplied to the sieve 35 is vibrated by the diaphragm 33, falls from the sieve 35 through the funnel 31 onto the powder table 9, and is deposited on the powder table 9 as the powder accumulation layer 7.

  More specifically, the automatic powder supply unit 37 puts the powder in a basket-like container 39 as shown in FIG. When the container 39 containing the powder is put into the supply unit 41 shown in FIG. 8B, the shaft 43 hits the shutter receiver 45 of the container 39, the shutter 47 of the container 39 is opened, and the powder falls downward. , And is supplied into the sieve 35. As shown in FIG. 9, it is also possible to provide a supply drive source 40 made of, for example, a screw at the rear of the container 39 and supply the powder in the container while stirring.

  Further, as shown in FIGS. 1 and 2, two air suction parts 51 are provided on the left and right of the upper part of the front surface of the rear box part 3 of the powder property measuring apparatus 100, and the stage 1 and the rear box part 3 are provided. A plurality of dust discharge ports 53 are formed at the boundary between the external air sucked from the air suction unit 51 and the dust discharge port 53 together with the internal dust through the measurement chamber of the powder characteristic measuring device 100. It is designed to be discharged from the outside. The air suction portion 51 and an air suction opening portion 57 described later constitute an indoor upper opening, and the dust discharge port 53 constitutes an indoor lower opening.

  More specifically, as shown in FIG. 6, the air suction portion 51 is covered with a mesh 55, and then the interior of the rear box portion 3 extends obliquely upward, and is formed on the ceiling of the rear box portion 3. The air communicates with the opening 57, sucks external air from the air suction opening 57, supplies the air into the measurement chamber through the air suction part 51, and discharges the air through the dust discharge port 53. A filter 59 is attached inside the air suction opening 57 on the ceiling of the rear box 3, and a filter replacement lid 61 made of a net or punching metal is attached outside the air suction opening 57. It has been. The net 55 covering the air suction part 51 may be a punching metal or the like.

  The plurality of dust discharge ports 53 formed at the boundary between the stage 1 and the rear box 3 are partially enlarged and illustrated in FIGS. 7 (a), 7 (b), and 7 (c). The dust discharge port 53 is entirely covered with one discharge duct 63 as shown in FIG. 3. The dust discharge port 53 is formed as a short rectangular hole 53a, a substantially round hole 53b, or an elongated rectangular hole 53c. After being combined, the exhaust hose 65 is connected to the exhaust hose 65 so as to be discharged to the outside. As shown in FIG. 1, the exhaust hose 65 has an exhaust port 65a exposed to the outside of the powder characteristic measuring apparatus 100, and dust and the like in the measurement chamber are discharged to the outside from the exhaust port 65a.

  An exhaust fan 88 is provided at the end of the exhaust hose 65 connected to the exhaust port 65a. The exhaust fan 88 discharges dust in the measurement chamber to the outside. That is, the powder is dropped onto the powder table 9 from the automatic powder supply unit 37 via the sieve 35 and the funnel 31 to form the powder accumulation layer 7 on the powder table 9, and will be described later. As described above, even if the powder is scattered in the measurement chamber due to the impact vibration applied to the powder accumulation layer 7 formed on the powder table 9, the exhaust fan 88 is activated, so that the external air is Powder that has entered the measurement chamber through the air suction opening 57 and the air suction portion 51, passes through the dust discharge port 53 and the exhaust hose 65, and is discharged to the outside through the exhaust port 65a, and is scattered into the measurement chamber. Is discharged to the outside, and the powder does not stagnate in the measurement chamber and accumulate on various parts such as the bottom of the measurement chamber or the measurement member in the measurement chamber.

  For example, a vacuum cleaner or the like may be connected to the exhaust port 65a of the exhaust hose 65, and the dust flowing inside the apparatus may be sucked by the vacuum cleaner or the like.

  As shown in FIGS. 1 and 2, an infrared camera 71 and an infrared LED light source 73 are opposed to each other on the front surface of the rear box 3 on both the left and right sides of the powder accumulation layer 7 with the powder accumulation layer 7 interposed therebetween. It is attached. The infrared camera 71 images the powder accumulation layer 7 toward infrared rays from the infrared LED light source 73, supplies data of the imaged powder accumulation layer 7 to a computer (not shown), and the computer records the powder accumulation layer 7. Characteristics such as repose angle, collapse angle, and spatula angle are analyzed.

  4 and 5 is provided with a spatula bar 111 which is a plate-like member instead of the angle of repose bar 11 in the powder property measuring apparatus 100 shown in FIGS. The only difference is that a powder accumulation layer 70 for measuring a spatula angle is placed on 111, and the other components are the same as those of the powder characteristic measuring apparatus shown in FIGS. Are denoted by the same reference numerals, and description thereof is omitted. The powder property measuring apparatus shown in FIGS. 4 and 5 is denoted by reference numeral 100a and described as the powder property measuring apparatus 100a when it is necessary to explain separately from those shown in FIGS. To do.

  In the powder characteristic measuring apparatus 100 or 100a configured as described above, in order to measure the repose angle, collapse angle, spatula angle, etc. of the powder accumulation layer, first, the powder is dropped on the powder table 9 from above. Thus, it is necessary to form the powder deposition layer 7.

  In order to form the powder accumulation layer 7, first, powder is put in a basket-like container 39 of an automatic powder supply unit 37, and the container 39 containing the powder is supplied as shown in FIG. Place in unit 41. When the container 39 containing powder is put into the supply unit 41, the shaft 43 hits the shutter receiver 45 of the container 39, the shutter 47 of the container 39 is opened, and the powder in the container 39 falls downward, and the powder It is supplied into the sieve 35 below the automatic supply unit 37.

  The powder supplied to the sieve 35 is vibrated by the diaphragm 33, falls from the sieve 35 through the funnel 31 onto the powder table 9, and is deposited on the powder table 9 as the powder accumulation layer 7.

  As described above, in the process of forming the powder accumulation layer 7 on the powder table 9, the powder is charged into the sieve 35 from the automatic powder supply unit 37, and the powder charged into the sieve 35 is While being oscillated by the diaphragm 33, it is dropped onto the powder table 9 through the funnel 31, but when such powder is charged, vibrated, or dropped, the powder scatters into the measurement chamber. In this embodiment, the upper part of the measurement chamber is open at the top of the measurement chamber. However, in this embodiment, the scattered powder may accumulate on various parts such as the bottom of the measurement chamber and the measurement member in the measurement chamber. An air suction part 51 serving as a mouth is provided in communication with the air suction opening 57, and a dust discharge port 53 is provided in the lower part of the measurement chamber. The dust discharge port 53 includes an exhaust hose 65 and an exhaust fan 88. Exhaust port 65a through Therefore, by operating the exhaust fan 88, external air enters the measurement chamber through the air suction opening 57 and the air suction portion 51, passes through the dust discharge port 53 and the exhaust hose 65, and is exhausted. A flow of air that is discharged to the outside from the opening 65a is formed, and the powder scattered in the measurement chamber along with this air flow is discharged to the outside, the powder stays in the measurement chamber, and the bottom of the measurement chamber or the measurement chamber Therefore, the powder deposited layer 7 can be measured quickly.

  Further, when impact vibration is applied to the powder accumulation layer 7 on the powder table 9 by the weight 19 in order to measure a spatula angle or the like, the powder in the powder accumulation layer 7 is measured by the impact vibration in the measurement chamber. However, as described above, when the exhaust fan 88 is actuated, the scattered air enters the measurement chamber from the air suction opening 57 and the air suction section 51, and the dust discharge port. 53, it passes through the exhaust hose 65 and is discharged to the outside along with the flow of air that is discharged to the outside from the exhaust port 65a, so that the powder does not stagnate inside the measurement chamber and accumulate in various parts. The body deposition layer 7 can be measured quickly.

  In the above embodiment, the powder is automatically supplied by the automatic powder supply unit 37, but it may be supplied by hand instead. In this case, a powder inlet is provided at the automatic powder supply unit 37. The powder inlet is a detachable port that can be attached to and detached from the supply port of the automatic powder supply unit 37.

DESCRIPTION OF SYMBOLS 1 Stage 3 Back box part 5 Butt 7, 70 Powder accumulation layer 9 Powder table 11 Repose angle bar 15 Cylindrical member 19 Weight 19a Recess 21 Tubular body 25, 251 Stopper 31 Funnel 35 Sieve 37 Automatic powder supply unit 51 Air suction portion 53 Dust discharge port 55 Net 57 Air suction opening 59 Filter 61 Filter replacement lid 63 Discharge duct 65 Exhaust hose 71 Infrared camera 73 Infrared LED light source 88 Exhaust fan

Claims (2)

A powder property measuring apparatus provided with a measuring means for measuring at least an angle of repose, a collapse angle, and a spatula angle with respect to a powder accumulation layer on a powder table disposed in a measurement chamber,
The measurement chamber is provided on the ceiling and an exhaust fan that creates a flow in which at least air from the outside enters the room through the indoor upper opening and flows outward from the indoor lower opening, and manually supplies the powder of the measuring means. A powder characteristic measuring device comprising a powder inlet for the purpose.   2. The powder characteristic measuring apparatus according to claim 1, wherein the powder inlet is a detachable port that can be attached to and detached from a supply port of a powder automatic supply unit prepared separately.

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