JP7307920B2 - Dust collector, dust collector, solid preparation manufacturing device, dust collection system, and solid preparation manufacturing method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a dust collection device, a dust collector, a solid formulation manufacturing apparatus, a dust collection system, and a solid formulation manufacturing method.

BACKGROUND ART A solid formulation filling machine is known in which a material (powder or granular material) is introduced from an inlet on the top of the machine to produce divided products. In a device such as this filling machine that feeds powder into the inlet, an exhaust hood is installed above the inlet as a measure to prevent dust from scattering around the inlet when the powder is fed. , the scattered dust is sucked out from an exhaust hood (for example, Patent Document 1).

JP 2009-249359 A

However, in the exhaust hood, the sucked dust may not be completely discharged and part of the dust may remain attached to the inner peripheral surface of the hood. In this case, if the hood is not sufficiently cleaned, clumps of dust that have adhered later may come off and fall off and be mixed into the product.

The present disclosure aims to provide a dust collecting device, a dust collector, a solid preparation manufacturing apparatus, a dust collection system, and a solid preparation manufacturing method that can more efficiently and effectively suppress the generation of dust when powdered or granular material is introduced. aim.

A dust collecting device according to an aspect of an embodiment of the present invention is a dust collecting device installed at an inlet of a device into which powdery or granular material is introduced, comprising: a cylindrical portion through which the powdery or granular material passes; and an annular pipeline provided on the outer peripheral side of the tubular portion, and an annular pipeline provided along the entire circumferential direction of the inner peripheral surface of the tubular portion to communicate between the inner side of the tubular portion and the annular pipeline. and a suction port provided at one end of the annular conduit for inhaling dust generated by charging the granular material into the annular conduit and communicating with the outside to discharge the dust sucked into the annular conduit to the outside. and a suction port for sucking out the liquid, and the annular conduit is formed so that the cross-sectional area decreases as it progresses from the one end where the suction port is provided to the other end.

Similarly, a dust collector according to an aspect of an embodiment of the present invention includes the above-described dust collecting device, and an air suction device connected to the suction port of the dust collecting device to suck air in the annular conduit. and an apparatus.

Similarly, a solid preparation manufacturing apparatus according to one aspect of an embodiment of the present invention is a solid preparation manufacturing apparatus that outputs a solid preparation by filling a bag with powder or granular material to be fed into an inlet, wherein A dust collector is installed in the inlet.

Similarly, a dust collection system according to an aspect of an embodiment of the present invention includes a filling device that fills a bag with powder or granular material that is put into an inlet and outputs the bag, and the dust collection device that is placed in the inlet. and the dust collector installed above.

Similarly, the method for producing a solid preparation according to one aspect of the embodiment of the present invention includes a cylindrical portion through which the powder or granular material passes, an annular pipeline provided on the outer peripheral side of the cylindrical portion, and the cylindrical portion. A suction unit provided along the entire circumferential direction of the inner peripheral surface, communicating between the inside of the cylindrical portion and the annular pipeline, and sucking dust generated along with the introduction of powder or granular material into the annular pipeline. and a suction port provided at one end of the annular pipeline and communicating with the outside for sucking out the dust sucked into the annular pipeline , wherein the annular pipeline is provided with the suction port. a step of installing a dust collecting device formed so that the cross-sectional area becomes smaller as it progresses from the one end to the other end of the dust collecting device at the inlet of the device into which the granular material is charged; connecting an air suction device to the suction port to suck out the air in the annular pipeline; include.

According to the present disclosure, a dust collection device, a dust collector, a solid preparation production apparatus, a dust collection system, and a solid preparation production method that can more efficiently and effectively suppress the generation of dust when powders are added are provided. can do.

It is a mimetic diagram showing a dust collection system concerning an embodiment. It is an assembly perspective view of the instrument for dust collection which concerns on embodiment. 1 is an exploded perspective view of a dust collecting device according to an embodiment; FIG. FIG. 3 is a sectional view along IV-IV in FIG. 2; Fig. 10 is a top view of the upper body; FIG. 4 is a schematic diagram showing the flow of air in an annular conduit; FIG. 4 is a diagram showing an example of an arrangement pattern of suction ports provided on an inner peripheral surface of a cylindrical portion;

Embodiments will be described below with reference to the accompanying drawings. In order to facilitate understanding of the description, the same constituent elements in each drawing are denoted by the same reference numerals as much as possible, and overlapping descriptions are omitted.

In each drawing, the x-direction, the y-direction, and the z-direction are directions orthogonal to each other. Typically the x and y directions are horizontal and the z direction is vertical. The x direction is the axial direction of the suction port 51 . The z direction is the stacking direction of the upper member 41 and the lower member 42 of the dust collecting device 4 . In the following description, the positive z direction side is also referred to as the "upper side" and the negative z direction side is referred to as the "lower side".

<Dust collection system>
First, with reference to FIG. 1, a dust collection system 1 to which a dust collection device 4 according to this embodiment is applied will be described. FIG. 1 is a schematic diagram showing a dust collection system 1 according to an embodiment.

As shown in FIG. 1 , the dust collection system 1 includes a filling device 2 and a dust collector 3 . The filling device 2 is a device that fills a bag 25 with the granular material 24 introduced into the inlet 21 and outputs the same. The filling device 2 typically injects the granular material 24 into an inlet 21 that opens upward, and fills a bag 25 such as a capsule or a small bag with the powder to produce a packaged product. In the filling device 2, for example, powdery grains 24 fed into an inlet 21 are aggregated by a hopper 21a and introduced into a main body 22. Inside the main body 22, a bag 25 such as a capsule or a small bag is filled, and an output section 23 is filled. output from

The filling device 2 of the present embodiment also includes a “solid preparation manufacturing device” that fills the bag body 25 with powder or granular material that is introduced into the inlet 21 and outputs a solid preparation.

When the granular material 24 is introduced into the charging port 21 of the filling device 2, dust is generated outside from the charging port 21 because the granular material 24 collides with the hopper 21a and the inner wall of the charging port 21. Sometimes. The dust collector 3 is a device for collecting dust generated at the inlet 21 of the filling device 2 in this way. The dust collector 3 includes a dust collector 4 , an air suction device 5 and an air supply device 6 .

The dust collecting device 4 is installed at the inlet 21 of the filling device 2 . The dust collecting device 4 is typically fitted along the outer edge of the upper end of the inlet 21 . The dust collector 4 installed above the inlet 21 receives the powder 24 introduced into the filling device 2 instead of the inlet 21 and guides the generated dust to the air suction device 5 . Details of the dust collecting device 4 will be described later.

The air suction device 5 is connected to the suction port 51 of the dust collecting device 4 and collects dust by sucking air from an annular pipe 48 (see FIG. 4) inside the dust collecting device 4 . The air suction device 5 has a suction device 5a and a tube 5b. The tube 5b communicably connects the suction port 51 and the suction device 5a. The suction device 5a can transmit suction force to the dust collecting device 4 via the tube 5b to suck out the dust from the dust collecting device 4. As shown in FIG.

The air supply device 6 is provided on the input side (upper side) of the particulate matter 24 from the dust collecting device 4 and feeds the cleaning air washed by the filter device 62 toward the dust collecting device 4 . The air supply device 6 has a fan 61 and a filter device 62 . A fan 61 is arranged above the filter device 62, and when the fan 61 is rotationally driven, it generates a wind toward the inlet 21 of the dust collecting device 4 vertically downward. The air generated by the fan 61 passes through the filter device 62 and is cleaned, and the cleaning air is output from the air supply device 6 .

Thus, the dust collector 3 has two elements for suppressing dust generated at the inlet 21 of the filling device 2 . The first element is a combination of the dust collection device 4 and the air suction device 5. By efficiently collecting dust with the dust collection device 4 and collecting it with the air suction device 5, dust generation is suppressed. do. The second element is the air supply device 6, which supplies cleansing air to the input port 21 to prevent the dust from rising upwards, thereby suppressing the generation of dust. By using these two elements together, the dust collector 3 can efficiently and effectively suppress the generation of dust.

Note that the dust collector 3 may be configured to include only a combination of the dust collector 4 and the air suction device 5 without including the air supply device 6 .

The dust collecting device 4 of the dust collector 3 is not an independent object attached to the inlet 21 of the filling device 2 shown in FIG. good. In this case, for example, a suction port 49 (see FIG. 4), which will be described later, is provided on the inner wall of the inlet 21, and an annular conduit 48 is provided around the inner wall. A suction port 51 is provided on the outer wall of the inlet 21 .

<Dust collection device>
The configuration of the dust collecting device 4 according to the present embodiment will be described with reference to FIGS. 2 to 7. FIG. FIG. 2 is an assembled perspective view of the dust collecting device 4 according to the embodiment. FIG. 3 is an exploded perspective view of the dust collecting device 4 according to the embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 5 is a top view of the upper body 43. FIG. FIG. 6 is a schematic diagram showing the flow of air in the annular conduit 48. As shown in FIG. FIG. 7 is a diagram showing an example of an arrangement pattern of the suction ports 49 provided on the inner peripheral surface of the cylindrical portion 47. As shown in FIG.

As shown in FIGS. 2 and 3, the dust collecting device 4 is constructed by vertically stacking two members, an upper member 41 (first member) and a lower member 42 (second member). The upper member 41 has an upper body 43 , a top plate 44 and a lid 45 . A top plate 44 is attached from above the upper body 43 , and a lid 45 is attached from above the top plate 44 . The lower member 42 has a funnel portion 46 and a connecting portion 57 . The funnel portion 46 is arranged above the connecting portion 57 .

The upper main body 43 includes a tubular portion 47 through which the granular material 24 passes, and a housing 50 provided on the outer peripheral side of the tubular portion 47 . An inner wall forming the tubular portion 47 and an outer wall of the housing 50 form an annular pipe 48 provided on the outer peripheral side of the tubular portion 47 . As shown in FIGS. 2, 5 and 6, the tubular portion 47 and the annular conduit 48 are annular. The lower end of the annular conduit 48 is sealed with a bottom plate 56 provided between the tubular portion 47 and the housing 50 . On the other hand, the upper end of the annular conduit 48 is closed with a detachable upper plate 44 as shown in FIG. By removing the upper plate 44 from the upper body 43 during maintenance, the upper surface of the annular conduit 48 can be opened over the entire flow direction, and the inside of the conduit can be easily cleaned.

As shown in FIGS. 3 and 5 , reinforcing plates 53 are provided on the upper end of the annular conduit 48 to connect the tubular portion 47 and the housing 50 at approximately 90° intervals along the circumferential direction of the tubular portion 47 . is provided. The reinforcing plate 53 is arranged so that its main surface is in the vertical direction and its longitudinal direction is in the radial direction of the cylindrical portion 47 , and one end in the longitudinal direction is connected to the cylindrical portion 47 and the other end is connected to the housing 50 . there is The reinforcing plate 53 maintains the width of the annular pipeline 48 and supports the bottom surface of the upper plate 44 .

The upper plate 44 has substantially the same shape as the upper end of the upper body 43 and is attached to the upper end of the upper body 43 . A substantially circular opening 44 a is provided in the central portion of the upper plate 44 . The opening 44a is provided at a position overlapping the tubular portion 47 when viewed in the z-direction, and when the upper plate 44 is assembled to the upper body 43, the opening 44a closes the annular conduit 48 and closes the tubular portion 47. is formed to open to the outside. Also, the lid 45 is attached to the upper plate 44 so as to close the opening 44a of the upper plate 44 . When the lid 45 is attached, the opening at the upper end of the cylindrical portion 47 is closed. For example, by covering the opening 44a of the upper plate 44 with the lid 45 when the filling device 2 is not in use, it is possible to prevent impurities such as dust from falling into and entering the inlet 21 of the filling device 2. FIG.

As shown in FIGS. 5 and 6 , two partition plates 52 and 55 are arranged between the tubular portion 47 and the housing 50 to block the annular conduit 48 . The partition plate 55 is arranged so as to extend along the radial direction of the tubular portion 47 at a substantially central position on the positive x direction side of the circular tubular portion 47 . The partition plate 52 is arranged at a position on the positive y direction side of the partition plate 55 . The suction port 51 is provided at a position on the y negative direction side of the partition plate 55 . FIG. 6 is a schematic diagram highlighting the annular pipeline 48 from FIG. As shown in FIG. 6, the annular conduit 48 starts from an end 48A (the other end) on the side of the partition plate 52 and extends counterclockwise along the tubular portion 47 to an end 48B (the one end) on the side of the partition plate 55. extends up to The suction port 51 is provided at the end portion 48B on the one end side of the annular conduit 48 .

When viewed from the z-direction, the partition plate 52 is arranged so as to be inclined with respect to the partition plate 55 in the flow direction of the annular pipeline 48 . In other words, the end portion of the partition plate 52 that contacts the outer casing 50 is arranged downstream (counterclockwise direction) of the annular conduit 48 than the end portion that contacts the inner cylindrical portion 47 . . As a result, the dust introduced into the annular pipe 48 from the suction port 49 (to be described later) can be smoothly guided to the downstream side of the annular pipe 48 .

The partition plate 52 is fixed between the housing 50 and the cylindrical portion 47, for example. The partition plate 55 is provided, for example, so as to protrude from the bottom surface of the upper plate 44 in the z-negative direction, and is inserted into the annular conduit 48 when the upper plate 44 is attached to the upper body 43 . In addition, the two partition plates 52 and 55 only need to be able to separate the starting end side and the terminal end side of the annular pipeline 48, and only one of them may be provided.

As shown in FIG. 5, when viewed from the z direction, the direction of the axis C of the suction port 51 is parallel to the direction of the tangent line B of the annular shape of the cylindrical portion 47, and the center of the cylindrical portion 47 provided at a position displaced from the The tangent line B is a tangent line that passes through the contact point A on the most negative y direction side of the annular shape of the cylindrical portion 47 (in other words, the intersection point A of a straight line that passes through the center of the cylindrical portion 47 and is parallel to the y axis), parallel to the x-axis. That is, the axis C of the suction port 51 is also parallel to the x-axis. The suction port 51 is offset from the center of the cylindrical portion 47 in the y negative direction, and is provided at a position where the tangent line B can pass through the suction port 51 . The suction port 51 is preferably located inside (y positive direction side) of the side surface of the housing 50 on the y negative direction side.

The annular conduit 48 shifts the axial center position of the cylindrical portion 47 in the positive y direction with respect to the central position of the housing 50 in the y direction when viewed from the direction (z direction) of the powdery material 24 being introduced. As a result, the distance between the inner wall of the tubular portion 47 and the outer wall of the housing 50 is formed to decrease from one end (end portion 48B) where the suction port 51 is provided to the other end (end portion 48A). Thereby, the annular pipeline 48 is formed such that the cross-sectional area decreases from one end where the suction port 51 is provided to the other end.

As shown in FIGS. 3 and 4, the inner peripheral surface of the tubular portion 47 is provided with a plurality of suction ports 49 along the entire inner peripheral surface. The suction port 49 communicates between the inner side of the tubular portion 47 and the annular conduit 48 and sucks dust generated along with the injection of the granular material 24 into the annular conduit 48 .

The suction port 49 is arranged such that the position of the annular pipe line 48 arranged advances from the end portion 48B (one end) on the terminal side where the suction port 51 is provided to the end portion 48A (the other end) on the starting end side. is formed so that the aperture ratio with respect to the area of the inner peripheral surface provided with is large. For example, as shown in FIG. 7, the tubular portion 47 is divided into four along the end side from the starting end side of the annular conduit 48, and the opening ratio of the suction port 49 is 40 in the first region 47a on the most starting end side. %, the opening ratio of the suction port 49 is 30% in the next second region 47b, the opening ratio of the suction port 49 is 20% in the next third region 47c, and the opening of the suction port 49 is in the fourth region 47d on the most terminal side. Formed to have a rate of 10%.

The aperture ratio can be increased or decreased by changing the size of each hole since the number of suction ports 49 is the same in each region 47a to 47d as shown in FIG. 7, but another method may be used. For example, the opening ratio may be adjusted by making the size of the suction port 49 the same in each of the regions 47a to 47d and changing the number of the suction port 49 in each of the regions 47a to 47d.

Moreover, the suction port 49 only needs to be able to vary the opening ratio according to the position of the annular conduit 48, and the shape of the suction port 49 may be a shape other than the circular shape shown in FIG. For example, a polygonal shape may be used, and slits may be used instead of holes. Also, the range of variation in the aperture ratio may be different from 10 to 40% in this embodiment, and the steps of variation in the aperture ratio may be different from the four steps in this embodiment.

As shown in FIGS. 3 and 4, the funnel portion 46 is a trumpet-shaped cylindrical body, and is formed such that the upper portion is longer in circumference than the lower portion and spreads upward. The funnel portion 46 can allow the granular material 24 to pass through the center similarly to the cylindrical portion 47 .

A connecting portion 57 is connected to the lower end of the funnel portion 46 . The connecting portion 57 is a box-shaped member with an open bottom, and has a substantially rectangular top plate 57a and a frame body 57b protruding downward along the outer edge of the top plate 57a. The lower end of the funnel portion 46 penetrates the top plate 57a, so that the granular material 24 introduced from above can pass downward. As shown in FIG. 4, the connecting portion 57 has a frame 57b formed in the same shape as the upper opening of the inlet 21 of the filling device 2. It is attached to the input port 21 by being supported by the upper end of the port 21 .

4 and 5, the upper end of the funnel portion 46 supports the bottom plate 56 of the upper member 41 at a position where the funnel portion 46 and the cylindrical portion 47 overlap when viewed from the z direction. , the upper member 41 and the lower member 42 are assembled integrally.

As shown in FIG. 4 , the inner peripheral surface of the tubular portion 47 protrudes toward the center from the upper end of the funnel portion 46 (the end on the tubular portion 47 side), and the tubular portion 47 and the funnel portion 46 are separated from each other. A portion of the bottom plate 56 of the annular conduit 48 is exposed therebetween. A portion of the bottom plate 56 is also referred to as a “connecting portion” that connects the end portion of the cylindrical portion 47 on the funnel portion 46 side (lower side) and the end portion of the funnel portion 46 on the cylindrical portion 47 side (upper side). can be expressed.

As shown in FIG. 5, the portion of the bottom plate 56 exposed between the tubular portion 47 and the funnel portion 46 (the portion indicated by the radial width D in FIG. 5) has a second suction port 54 formed in a tubular shape. It is provided over the entire circumferential direction of the portion 47 . As shown in FIG. 4, the second suction port 54 is provided so as to communicate between the inside of the funnel portion 46 and the annular pipeline 48, and directs the dust generated along with the injection of the granular material 24 into the annular pipeline 48. Can be inhaled.

The second suction port 54 is formed in a slit shape along the circumferential direction of the cylindrical portion 47 in FIG. Other shapes, such as a contiguous configuration, may also be used.

Next, the effects of the dust collecting device 4 of this embodiment will be described. The dust collecting device 4 includes a cylindrical portion 47 through which the powdery particles 24 pass, an annular pipe line 48 provided on the outer peripheral side of the cylindrical portion 47, and the entire inner peripheral surface of the cylindrical portion 47 in the circumferential direction. a suction port 49 for sucking into the annular pipeline 48 the dust generated along with the injection of the granular material 24, and the annular pipeline 48; and a suction port 51 that is provided at one end of the and communicates with the outside.

With this configuration, as shown by the shaded area in FIG. 6, air flows in one direction (counterclockwise direction in FIG. 6) outside the cylindrical portion 47, and the air flow is discharged to the outside from the suction port 51. An annular conduit 48 is formed which creates a . Air always flows into the annular conduit 48 from the inside of the tubular part 47 along the entire length of the annular conduit 48 through the suction port 49 provided along the entire circumferential direction of the tubular part 47 . By creating such an air flow, when dust is generated from the granular material 24 thrown into the cylindrical portion 47, the dust is reliably generated at any position in the internal space of the cylindrical portion 47. Dust can be introduced from the suction port 49 into the annular conduit 48 , and the dust introduced into the annular conduit 48 can be quickly discharged from the suction port 51 . Therefore, it becomes possible to collect the dust generated when the granular material 24 is charged very efficiently, and the generation of dust when the granular material 24 is charged can be suppressed more efficiently and effectively.

Further, in the present embodiment, the cylindrical portion 47 and the annular conduit 48 are annular, and the axial direction of the suction port 51 is the tangential direction of the annular shape of the cylindrical portion 47 (the tangential line B shown in FIG. 5). extending direction) and is provided at a position displaced from the center of the cylindrical portion 47 . As shown by the dotted line in FIG. 6, when the air outlet 51a is located at the center of the tubular portion 47, the flow bends at the portion entering the air outlet 51 from the annular conduit 48. The loss is large, and dust tends to accumulate in the annular pipe 48 at the portion where the flow bends. On the other hand, if the suction port 51 is at a position deviated from the center of the cylindrical portion 47 as in the present embodiment, when the annular air flow around the cylindrical portion 47 is guided to the suction port 51, Since the air flow is less bent and flows smoothly with relatively low resistance, the energy loss of the air flow in the annular conduit 48 is reduced, dust can be discharged more efficiently, and the dust can be discharged into the annular conduit 48. Deposition can be suppressed.

In addition, in the present embodiment, the annular pipeline 48 is formed so that the cross-sectional area becomes smaller as it progresses from one end where the suction port 51 is provided to the other end. In other words, the cross-sectional area increases from the starting point of the annular conduit 48 toward the terminal point. Specifically, in the present embodiment, when viewed from the charging direction (z direction) of the granular material 24, the axial center position of the tubular portion 47 is shifted with respect to the center position of the housing 50, whereby the suction is performed. The annular conduit 48 is formed such that the distance between the inner wall of the cylindrical portion 47 and the outer wall of the housing 50 becomes smaller as it progresses from one end where the outlet 51 is provided to the other end. That is, the distance between the inner wall of the cylindrical portion 47 and the outer wall of the housing 50 increases from the start point (end portion 48A) of the annular conduit 48 toward the end point (end portion 48B).

If the cross-sectional areas of the annular pipeline 48 are all the same size along the flow direction, the air suction device 5 is connected to the end point (end 48B) of the annular pipeline 48, so that the flow of the annular pipeline 48 The amount of air introduced into the annular duct 48 at the suction port 49 at each position in the direction tends to be larger nearer the end point and smaller nearer the starting point (end portion 48A). On the other hand, in the present embodiment, as described above, the cross-sectional area of the annular pipeline 48 is formed so as to decrease toward the start point side and increase toward the end point side. The amount of air flowing through the suction port 49 can be made uniform at each position of , and as a result, the amount of dust sucked from the suction port 49 can be made uniform throughout the flow direction of the annular pipe 48 .

In addition, since the suction port 49 provided in the cylindrical portion 47 is provided over the entire circumferential direction, if substantially the same amount of dust is sucked at each position in the circumferential direction, the air will be sucked from the upstream of the annular duct 48 . The amount of dust increases as it goes downstream. On the other hand, as in the present embodiment, the distance between the inner wall of the tubular portion 47 and the outer wall of the housing 50 is increased as the annular pipe 48 progresses from the upstream side to the downstream side. By forming the cross-sectional area to be large, a sufficient space corresponding to the amount of dust can be secured at each position of the annular pipe 48, so that the pipe can be prevented from being clogged with dust, and the dust can be directed downstream. It can flow easily and smoothly.

Further, in the present embodiment, the position of the annular conduit 48 disposed in the suction port 49 increases as the suction port 49 advances from one end (end portion 48B) at which the suction port 51 is provided to the other end (end portion 48A). is formed so that the aperture ratio with respect to the area of the inner peripheral surface provided with is large. That is, the opening ratio of the suction port 49 becomes smaller as it progresses from the upstream to the downstream of the annular conduit 48 .

With this configuration, on the starting point side of the annular duct 48 where the air volume of the suction port 49 is small, the opening ratio of the suction port 49 is increased to reduce the resistance when the air passes through the suction port 49, thereby reducing the dust. can be easily absorbed. On the other hand, on the end point side of the annular duct 48 where the air volume of the suction port 49 increases, the opening ratio of the suction port 49 is decreased to increase the resistance when the air passes through the suction port 49, thereby sucking dust. It can be done easily. As a result, the amount of dust sucked from the suction port 49 can be made uniform over the entire flow direction of the annular conduit 48, in the same manner as in the configuration that varies the cross-sectional area.

In addition, as the circular pipeline 48 progresses from the upstream to the downstream, the dust accumulates from each suction port 49, and the amount of dust flowing through the pipeline tends to increase. On the other hand, by decreasing the opening ratio of the suction port 49 toward the downstream side as in the present embodiment, the amount of dust newly accumulated on the downstream side of the pipeline 48 can be suppressed. Clogging can be further prevented, and dust can flow more smoothly downstream.

A portion of the bottom plate 56 of the cylindrical portion 47 that is exposed to the inside of the funnel portion 46 (the portion indicated by the radial width D in FIG. 5) communicates between the inside of the funnel portion 46 and the annular conduit 48 . A second suction port 54 is provided along the entire circumferential direction of the cylindrical portion 47 to suck dust generated by the injection of the granular material 24 into the annular conduit 48 .

With this configuration, dust can be collected not only from the inner peripheral surface of the cylindrical portion 47 but also from the bottom plate 56, so that the dust generated when the granular material 24 is introduced can be collected more efficiently. The occurrence can be suppressed more efficiently and effectively.

The dust collecting device 4 includes an upper member 41 including a tubular portion 47 and an annular conduit 48, and a lower member 42 including a funnel portion 46. At a position where the funnel portion 46 and the tubular portion 47 overlap, , the bottom plate 56 of the upper member 41 is supported by the upper end of the funnel portion 46, so that the upper member 41 and the lower member 42 are assembled integrally.

With this configuration, it is possible to dismantle a place where dust tends to accumulate, such as the joint between the funnel portion 46 and the cylindrical portion 47, and facilitate maintenance of the dust collecting device 4, such as removal of accumulated dust.

In addition, the dust collecting device 4 of the present embodiment is a system for producing solid preparations using different types of materials (granules) in one production line (manufacturing apparatus), that is, a (first) It can also be applied to a system that manufactures a solid formulation product using a material and then manufactures a solid formulation product using another (second) material on the same production line (manufacturing apparatus). Even in such a case, the clumps of dust adhering to the inner peripheral surface of the exhaust hood will not come off or fall and mix into the product. There is no

<Examples and application examples showing the effect of the embodiment>
The dust collector, dust collector, and filling device based on this embodiment are used as a dust collection system, and 0.5 μm fine particles and 5.0 μm fine particles, which are the raw materials of solid products of Chinese herbal medicine, are used as the target powders and granules. An example will be described to demonstrate the effect of dust suppression when

The details of various conditions in the examples are as follows.

(Implementation method) Measurement of the dust collection effect around the filling equipment for herbal medicine solid products (Measurement conditions) Confirmation of cleanness recovery while the air-conditioning system and local exhaust equipment of the injection hopper are in normal operation (Inspection object) Solid drug filling equipment System clean room (Inspection purpose) Confirm that the work is recovered within the set standard value (Measuring equipment) Particle counter (manufactured by Kanomax Japan Co., Ltd.: calibrated)

(Judgment Criteria) Measure at specified time intervals, and measure the recovery time until the measured value satisfies the cleanliness class Grade B listed in Table 1 below specified in the PIC/S GMP guidelines. The cleanliness class exemplified in Table 1 is the cleanliness class in manufacturing sterile pharmaceuticals according to ISO14644-1. Grade B is a clean area with high risk operations and a Grade A background environmental level for aseptic preparation and filling processes.

(Measurement method) 20 kg of herbal medicine solid product is put into the feeding hopper of the filling device, and immediately after that (t=0) is set as the worst condition, and the fine particles in the indoor air are measured with a particle counter every 2 minutes. When the measurement result reaches below the cleanliness standard value shown in Table 1 above two times in a row, it is considered to have recovered and the measurement is terminated.

(Measurement result)
The measurement results of the above examples are shown in Table 2 below. In the particle data obtained at each measurement time, the actual measured air volume of 2.83 L/min was converted to 1.0 m ³ /min.

As shown in Table 2, in this cleanliness recovery test, a dust collecting effect that quickly satisfied the criteria value of Grade B of the above criteria was obtained. From this result, it was found that the use of the dust collector or the like based on this embodiment can efficiently and effectively suppress the dust generated when the target powder or granular material is charged.

Dust-generating substances to be suppressed include, for example, natural products, minerals, chemicals, foods, pharmaceuticals, herbal medicines, agricultural chemicals, and powders such as raw materials, intermediates, and final products thereof. Examples are not limiting.

In addition, by suppressing the generation of dust from the target powder and granular material based on this embodiment, contamination with substances outside the system of the dust collection system is suppressed, and the environment due to diffusion into the air, water, and soil It is also useful for worker safety measures such as suppressing contamination, suppressing dust inhalation, and suppressing dust explosion.

Furthermore, by using the dust collection system and the solid preparation manufacturing apparatus based on this embodiment, it becomes possible to remove fine dust in the granules generated in the manufacturing process, and the quality of the final solid preparation product is improved. be able to.

The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Design modifications to these specific examples by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each specific example described above and its arrangement, conditions, shape, etc. are not limited to those illustrated and can be changed as appropriate. As long as there is no technical contradiction, the combination of the elements included in the specific examples described above can be changed as appropriate.

In the above-described embodiment, as elements for sucking dust into the annular conduit 48 of the dust collecting device 4 , the suction port 49 provided on the inner peripheral surface of the cylindrical portion 47 and the second nozzle provided on the bottom plate 56 of the annular conduit 48 are provided. Although the configuration provided with two types of suction ports, ie, the two suction ports 54, is illustrated, a configuration including at least the suction port 49 may be used.

In the above-described embodiment, the configuration in which the dust collecting device 4 can be disassembled into the upper member 41 and the lower member 42 was exemplified, but a configuration in which it is integrally formed is also possible.

When the dust collecting device 4 is provided integrally with the inlet 21 of the filling device 2, only the portion corresponding to the upper member 41 of the dust collecting device 4 may be used.

The suction port 51 of the dust collecting device 4 may be arranged such that its axis passes through the center of the tubular portion 47, like the suction port 51a indicated by the dotted line in FIG.

In the above-described embodiment, the opening ratio of the suction port 49 provided on the inner peripheral surface of the tubular portion 47 is changed according to the position of the annular conduit 48. 49 may have a uniform aperture ratio.

1 dust collection system 2 filling device (solid preparation manufacturing device)
24 Granular material 3 Dust collector 4 Dust collector 41 Upper member (first member)
42 Lower member (second member)
46 funnel portion 47 cylindrical portion 48 annular conduit 49 suction port 50 housing 51 suction port 54 second suction port 56 bottom plate (connecting portion)
5 air suction device 6 air supply device

Claims (11)

A dust collection device installed at an inlet of a device into which powder or granular material is introduced,
a tubular portion through which the granular material passes;
an annular pipeline provided on the outer peripheral side of the cylindrical portion;
It is provided over the entire circumferential direction of the inner peripheral surface of the cylindrical portion, and communicates between the inner side of the cylindrical portion and the annular conduit to remove dust generated along with the introduction of powder or granular material into the annular conduit. an inlet for inhaling into the passage;
a suction port provided at one end of the annular conduit and communicating with the outside for sucking out the dust sucked into the annular conduit ;
with
The annular conduit is formed so that the cross-sectional area decreases as it progresses from the one end where the suction port is provided to the other end.
Dust collector. The tubular portion and the annular pipeline are annular,
The suction port is provided at a position where the axial direction of the suction port is parallel to the tangential direction of the annular shape of the cylindrical portion and is deviated from the center of the cylindrical portion.
The dust collecting device according to claim 1. A housing provided on the outer peripheral side of the tubular portion,
The annular conduit is formed by an inner wall forming the cylindrical portion and an outer wall of the housing,
By shifting the axial center position of the cylindrical portion with respect to the center position of the housing when viewed from the charging direction of the powder or granular material, it is possible to move from the one end where the suction port is provided to the other end. formed so that the distance between the inner wall and the outer wall is small,
The dust collecting device according to claim 2 . The opening ratio of the suction port with respect to the area of the inner peripheral surface provided with the suction port increases as the position of the annular conduit arranged advances from the one end where the suction port is provided to the other end. formed like,
A dust collecting device according to any one of claims 1 to 3 . A dust collection device installed at an inlet of a device into which powder or granular material is introduced,
a tubular portion through which the granular material passes;
an annular pipeline provided on the outer peripheral side of the cylindrical portion;
It is provided over the entire circumferential direction of the inner peripheral surface of the cylindrical portion, and communicates between the inner side of the cylindrical portion and the annular conduit to remove dust generated along with the introduction of powder or granular material into the annular conduit. an inlet for inhaling into the passage;
a suction port provided at one end of the annular conduit and communicating with the outside;
with
The suction port is arranged such that the opening ratio with respect to the area of the inner peripheral surface where the suction port is provided increases as the position of the annular conduit arranged advances from the one end where the suction port is provided to the other end. formed,
a funnel portion provided downstream of the cylindrical portion in the charging direction of the powder or granular material and connected to the cylindrical portion, into which the powder or granular material that has passed through the cylindrical portion is charged;
The inner peripheral surface of the cylindrical portion protrudes toward the center from the end portion of the funnel portion on the cylindrical portion side. A connecting portion is provided to connect the end portion on the cylindrical portion side,
The connecting portion includes a second suction port that communicates between the inside of the funnel portion and the annular pipeline and sucks dust generated by charging the granular material into the annular pipeline. provided over the entire circumferential direction of
Dust collector. a first member including the tubular portion and the annular conduit;
a second member including the funnel,
The first member and the second member are integrally assembled by supporting the bottom plate of the first member at the end portion of the funnel portion at a position where the funnel portion and the cylindrical portion overlap,
The dust collecting device according to claim 5 . A dust collecting device according to any one of claims 1 to 6 ,
an air suction device connected to the suction port of the dust collecting device and sucking air in the annular conduit;
A dust collector with An air supply device is provided on the inlet side of the dust collecting device and feeds cleaning air washed by the filter device toward the dust collecting device,
The dust collector according to claim 7 . A solid preparation manufacturing apparatus for outputting a solid preparation by filling a bag with powder or granules fed into an inlet,
A solid preparation manufacturing apparatus, wherein the dust collection device according to any one of claims 1 to 6 is installed at the inlet. a filling device that fills a bag with powder or granular material that is fed into the inlet and outputs the bag;
9. The dust collector according to claim 7 or 8 , wherein the dust collecting device is installed at the input port;
dust collection system. A cylindrical portion through which the powder or granular material passes; an annular pipeline provided on the outer peripheral side of the cylindrical portion; and the annular pipeline, a suction port for sucking dust generated by the introduction of powder or granular material into the annular pipeline, and a suction port provided at one end of the annular pipeline and communicating with the outside, the annular and a suction port for sucking the dust sucked into the pipe to the outside , and the annular pipe is formed so that the cross-sectional area becomes smaller as it progresses from the one end where the suction port is provided to the other end. A step of installing a dust collecting device at an inlet of a device into which the granular material is introduced;
a step of connecting an air suction device to the suction port of the dust collecting device to suck out the air in the annular conduit;
a step of filling a bag with the powder or granular material introduced into the inlet and outputting a solid preparation.

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