JP5321408B2 - Rod sampler - Google Patents

Description

  The present invention relates to a bar sampler that collects powder from a powder mixer or the like for verification of a mixed state.

  After the completion of the mixing process, which is part of the manufacturing process for solid preparations (tablets, capsules, granules, etc.), the work to verify the appropriateness of the mixing uniformity of the powder (powder, granules) This is one of the important tasks for ensuring the quality of the product. For this reason, various rod-like samplers that collect powder in the mixer as a sample after the completion of the mixing operation are known.

  For example, an inner shaft having a circular cross section and an outer cylinder fitted to the outer periphery of the circular cross section of the inner shaft so as to be rotatable about the axis are inserted into the powder from the front end side of the insertion portion, Patent that collects powder in the housing part as a sample by forming a housing part that accommodates and closes the powder on the inner circumference side of the outer cylinder by rotating the outer cylinder around the axis with respect to the inner shaft The rod-shaped samplers shown in Documents 1, 2, and 3 are known.

  In addition, a pair of holding bodies that displace each other in the direction of separation and proximity by rotating the outer cylinder about the axis with respect to the inner shaft are provided, and when the insertion portion is inserted into the powder, the separated pair A rod-shaped sampler shown in Patent Document 4 is known in which powder holders are moved in the proximity direction, and powder is sandwiched and held between a pair of holders as a sample.

Japanese Patent Laid-Open No. 10-300645 JP-T-2001-503157 JP 2003-270101 A JP 2004-309253 A

  However, the rod-shaped samplers disclosed in Patent Documents 1 to 3 have notches formed in the outer cylinder by rotating the outer cylinder around the axis relative to the inner axis after the insertion portion has been inserted into the powder. The granular material is poured into the accommodating portion by opening the accommodating portion provided on the inner shaft through the shaped window, and the mixing state of the powder at the collection target location is changed by the flow of the powder. Therefore, there is a problem that a sample that does not accurately reflect the mixed state of the collection target portion may be collected.

Moreover, since the rod-shaped sampler of Patent Document 4 operates so that the pair of holding bodies sandwich and hold the powder, the movement of the powder at that time is suppressed. Therefore, there is a problem in that the surrounding powder may be moved at the time of insertion into the powder, and the mixed state of the powder at the collection target portion may not be maintained. In addition, a pair of holding bodies and a supporting member for supporting the holding bodies are required, and there is a problem that the structure becomes complicated.
The present invention is a rod-shaped sampler that solves the above-described problems and collects powder from a powder mixer such as a V-type mixer for verification of the mixing state, and collects the sample without complicating the structure. An object of the present invention is to provide a rod-shaped sampler capable of verifying an accurate mixed state by suppressing movement of powder at the time.

In order to solve the above problems, a rod-shaped sampler of the present invention includes , firstly, an inner shaft 2 having a circular cross section, and an outer cylinder 3 fitted to the outer periphery of the circular cross section of the inner shaft 2 so as to be rotatable about the axis. Is inserted into the powder from the insertion portion 6 on the distal end side, and the outer cylinder 3 is rotated around the axis with respect to the inner shaft 2 to accommodate the powder on the inner peripheral side of the outer cylinder 3. In the rod-shaped sampler that forms a container portion 17 that is closed and collects powder, the outer periphery of the circular cross section of the piercing portion 6 of the inner shaft 2 is a non-recessed notch and has a tip along the axial direction. The receiving surface 13 is formed into a linear shape, a raised shape, a raised arc shape, or a protruding shape in the axial direction of the insertion portion 6. The housing portion 17 is formed by the receiving surface 13 and the inner peripheral surface of the outer cylinder 3.

Secondly, the receiving surface 13 is extended to the tip side in parallel with the axis S of the inner shaft 2 in a side view, or the receiving surface 13 is notched toward the tip in a side view. It is characterized by being inclined on the opposite side to the side .

Third, the receiving surface 13, set the guide surface 14 inclined allowed to connect the peripheral surface of the circular cross section of the base end portion side of the receiving surface 13 only by the guide surface 14 and the receiving surface 13, side view It is characterized by the formation of a single surface that has a letter shape .

  Fourth, a gripping portion 7 exposed from the outer cylinder 3 is formed at the proximal end portion of the inner shaft 2, a guide groove 3b is formed in the outer cylinder 3, and the inner shaft 2 is formed along the guide groove 3b. A guide piece 8 that is movably engaged with the guide groove 3b is provided so as to be movable, and the rotation range of the outer cylinder 3 is regulated by the guide groove 3b and the guide piece 8.

  The sampler of the present invention configured as described above is formed with a non-recessed notch on the outer periphery of the circular cross section of the inner shaft insertion portion, and a receiving surface that reaches the tip along the axial direction. The receiving portion and the inner peripheral surface of the outer cylinder form the housing portion, and the unevenness on the piercing portion side can be minimized, so that the powder during piercing without complicating the structure Is prevented from being moved, and the outer cylinder is rotated about its axis with respect to the inner shaft, so that the powder in the vicinity of the receiving surface, which is a sampling target, is enclosed in the inner cylinder so as to be enclosed in the inner portion. Therefore, the flow of the powder at this time is also minimized. This has the effect that it is possible to verify the mixed state more accurately.

  Further, the receiving surface 13 is formed so as not to be inclined toward the inner shaft 2 notch side with respect to the inner shaft biaxial direction toward the distal end, and the base end side of the receiving surface 13 and the base end side By providing the inclined guide surface 14 that connects the peripheral surface of the circular cross section, there is an effect that the movement of the powder during the insertion can be further suppressed.

  In addition, the configuration of the piercing portion of the inner shaft is configured so as to be detachable from the main body portion of the inner shaft, so that the configuration of the piercing portion can be changed in a timely manner depending on the type of powder state to be collected. There is.

  Furthermore, by forming the grip portion exposed from the outer cylinder at the proximal end portion of the inner shaft, there is an effect that workability in sampling is improved. In addition, a guide groove is formed in the outer cylinder, and a guide piece that engages with the guide groove is movably provided along the guide groove on the inner shaft, and the outer cylinder is rotated by the guide groove and the guide piece. By regulating the range, workability in sampling is improved, and there is an effect of preventing powder leakage.

It is an exploded side view of the sampler to which the rod-shaped sampler of the present invention is applied. (A) is a side view of an inner-shaft main body, (B) is an AA expanded sectional view of (A). (A) is a side view of the inner shaft insertion body, (B) is a front view, (C) is an AA enlarged sectional view of (B), and (D) is (B). It is a BB expanded sectional view. (A) is a front view of an outer cylinder, (B) is an AA expanded sectional view of (A), (C) is a BB expanded sectional view of (A). It is a whole side view of this sampler. (A) is the principal part front view and bottom view of a sampler which shows a fully open state, (B) is the principal part front view and bottom view of a sampler which shows a half-open state, (C) is a sampler which shows a most closed state It is a principal part front view and bottom view. (A) thru | or (C) are the principal part plane sectional views of the piercing body 6 which shows other embodiment of this invention, respectively, (D) and (E) are each stab which shows other embodiment of this invention. It is a side view of the insert body 6. FIG. (A) is a perspective view which shows the principal part structure of the conventional rod-shaped sampler used for the comparison experiment, (B) is a simplified diagram of the V-type mixer used for the comparison experiment. FIG. 9 is a list showing what kind of particle size powder is contained in what ratio with respect to each of the sample for one time with the handle and the sample for 8 times with the rod-shaped sampler of the present invention. It is a table. It is a table | surface which shows what kind of particle diameter and what ratio were contained with respect to each of the sample for 1 time by a handle, and the sample for 8 times by the conventional rod-shaped sampler. (A) is a graph showing the list of FIG. 9, and (B) is a graph showing the list of FIG. In the collected sample, the ratio of the powder having a particle diameter of 75 μm or less is shown for the handle rod, the rod-shaped sampler of the present invention, and the conventional rod-shaped sampler, respectively.

Embodiments of the present invention will be described below based on the illustrated example.
FIG. 1 is an exploded side view of a rod-shaped sampler provided with the present invention. A main sampler (bar-shaped sampler) 1 is mainly composed of a cylindrical inner shaft 2 extending linearly and an outer tube 3 supported on the outer periphery of the inner shaft so as to be rotatable about an axis and extending linearly. The inner shaft 2 includes an inner shaft main body (main body portion, inner shaft main body portion) 4 on the proximal end portion and the middle portion side, and a piercing body (piercing portion) 6 on the distal end portion side. In addition, the sampler 1 is formed in a full length and a full width that match the particle diameter of the target powder and the shape and capacity of a container such as a mixer for storing the powder in accordance with the purpose of sampling.

  2A is a side view of the main body of the inner shaft, and FIG. 2B is an enlarged cross-sectional view taken along the line AA in FIG. The inner shaft main body 4 of the inner shaft 2 is formed so that the cross-sectional shape is circular from the base end to the entire front end, and the base end portion of the inner shaft main body 4 has a diameter compared to the midway portion and the front end portion. A cylindrical grip (gripping part) 7 having a large diameter is formed, and a cylindrical guide pin (guide piece) 8 is projected outwardly on the outer periphery of the midway part, and is axially engaged at the tip. A hole 4 a is recessed concentrically with the inner shaft body 4. The engagement hole 4a is opened toward the distal end side of the inner shaft main body 4, and is formed into a shape in which a part of the outer periphery of the circular cross section is formed in a notch shape with a string.

  FIG. 3A is a side view of the inner shaft insertion body, FIG. 3B is a front view, FIG. 3C is an AA enlarged sectional view of FIG. 3B, and FIG. It is a BB expanded sectional view of). The piercing body 6 is mainly attached and fixed integrally or embedded in a cylindrical portion 9 having a circular cross-sectional shape and extending on a concentric axis of the main body, and one end (inner shaft main body 4 side) of the cylindrical portion 9. The engaging piece 11 protrudes from the end portion in the axial direction of the cylindrical portion 9, and the receiving body 12 extends integrally from the other end of the cylindrical portion 9 in the axial direction.

  The engagement piece 11 is disposed on a concentric shaft with the cylindrical portion 9, and is formed in a shape corresponding to the engagement hole 4a of the inner shaft main body 4 (see FIG. 3C), and the engagement hole 4a. Is detachably inserted into and engaged. Incidentally, as described above, the engagement hole 4a is formed in a shape in which a part of a circle is cut out by a string, so that the rotational position of the insertion body 6 relative to the inner shaft main body 4 is relative to the axis. The engagement piece 11 is inserted into the engagement hole 4a in a state determined at a predetermined position. The engaging piece 11 may be provided at the end of the inner shaft main body 4 on the side of the piercing body 6 and the engaging hole 4 a may be provided at the end of the inner shaft main body 11 of the cylindrical portion 9.

  The outer periphery of the circular cross section of the cylindrical portion 9 formed in the same shape as the circular cross section is cut out in a non-depressed shape so as to have a cross-sectional shape composed of linear chords 12a and arcs 12b. The receiving surface 13 which reaches the tip of the piercing body 6 along the axial direction of the receiving body 12 is formed (see FIG. 4D).

  The receiving surface 13 is shaped so as not to incline toward the notch side (left side of the piercing body 6 in FIG. 1A) with respect to the axis S of the inner shaft 2 (see FIG. 1A) toward the tip. Has been. In the illustrated example, the receiving surface 13 is extended toward the distal end side in parallel with the axis S in a side view. Incidentally, the receiver 12 is formed in a shape in which a conical shape is cut out in the axial direction so that the tip is sharpened, and the cut-out portion constitutes a part of the receiving surface 13 described above. ing.

  The peripheral surface of the cylindrical portion 9 and the receiving surface 13 of the receiver 12 are connected by a guide surface (joint surface, inclined surface) 14 that is inclined with respect to the peripheral surface and the receiving surface 13. Since the receiving surface 13 and the guide surface 14 are processed to form a single smooth surface having a U-shape when viewed from the side, the resistance to the powder is reduced. When inserting into the powder, the movement (flow) of the powder is minimized.

  Then, by inserting the engagement piece 11 of the piercing body 6 into the engagement hole 4a of the inner shaft main body 4 (engagement insertion), the piercing body 6 is attached and fixed to the inner shaft main body 4, and the inner shaft The main body 4 and the piercing body 6 are in a state of rotating integrally around the axis. The form of engagement may be any form such as fitting, fixing with a pin or screw, screwing, or the like, but it is desirable to install a fitting portion so that it can be easily fixed in a certain direction during engagement. In addition, the piercing body 6 and the inner shaft main body 4 may be integrally formed, and the piercing body 6 and the inner shaft main body 4 are not necessarily limited to being separable.

  4A is a front view of the outer cylinder, FIG. 4B is an AA enlarged cross-sectional view of FIG. 4A, and FIG. 4C is a B-B enlarged cross-sectional view of FIG. The outer cylinder 3 is formed in a hollow cylindrical shape that can accommodate the distal end portion and the middle portion of the inner shaft 2, and the proximal end is open. From this open part, the tip of the inner shaft 2 is inserted to a position reaching the tip of the inner periphery of the outer cylinder 3.

  The outer cylinder 3 is axially cut at the front end side so as to expose the entire receiving surface 13 and guide surface 14 of the piercing body 6 of the inner shaft 2 when the inner shaft 2 is housed. A notch window (exposure window) 16 extending to the tip is formed. In addition, the distal end portion of the outer cylinder 3 is formed in a substantially semiconical shape corresponding to the shape of the distal end portion of the inner shaft 2 accommodated therein.

  An insertion guide groove (guide groove) 3a that extends in the axial direction of the outer cylinder 3 and is open on the proximal end side is cut out on the base end side of the outer periphery of the outer cylinder 3, and a circle extending in the direction around the axis An arcuate rotation guide groove (guide groove) 3b is cut out. A terminal end, which is the end opposite to the start end, which is the open end of the insertion guide groove 3a, and one end of the rotation guide groove 3b are connected to form a single guide groove 3a, 3b. .

  FIG. 5 is an overall side view of the sampler. After the inner shaft 2 is inserted into the outer tube 3 so that the guide pin 8 enters the insertion guide groove 3a from the start end, the inner shaft 2 is moved into the outer tube 3 until the guide pin 8 reaches the end of the insertion guide groove 3a. When inserted, the tip of the inner shaft 2 is positioned on the inner periphery of the tip of the outer cylinder 3. From this state, when the outer cylinder 3 is rotated about the axis with respect to the inner shaft 2 by the operation of the grip 7 or the like, the guide pin 8 moves into the rotation guide groove 3b and the outer cylinder 3 with respect to the inner shaft 2 is moved. The movement in the axial direction is restricted, and the outer cylinder 3 is prevented from coming off from the inner shaft 2.

  FIG. 6A is a front view and a bottom view of the main part of the sampler showing the fully opened state, FIG. 6B is a front view and a bottom view of the main part of the sampler showing the half-opened state, and FIG. It is the principal part front view and bottom view of the sampler which are shown. When the guide pin 8 is positioned at the insertion guide groove 3a side end (fully open end) of the rotation guide groove 3b, the entire receiving surface 13 and guide surface 14 of the inner shaft 2 (indentation) are provided through the notch window 16. The body 6) is exposed to a fully opened state (see FIG. 5A).

  When the outer cylinder 3 is rotated about the inner shaft 2 so that the guide pin 8 is positioned in the middle of the rotation guide groove 3b by gripping the grip 7, the receiving surface 13 and the guide are guided. A half portion of the surface 14 is in a half-open state covered with the outer cylinder 3, and a receiving portion 17 is formed by the receiving surface 13 and the inner peripheral surface of the outer cylinder 3.

  Further, by gripping the grip 7, the outer cylinder 3 is moved to the inner shaft 2 so that the guide pin 8 is positioned at the most closed end (fully closed end) which is the end opposite to the fully opened end in the rotation guide groove 3 b. When the rotary operation is performed with respect to the axis, the receiving surface 13 and the guide surface 14 are entirely covered so that the housing portion 17 is closed, and the front end portion of the sampler 1 is closed. Is in a conical state with the outer cylinder 3 and the tip of the inner shaft 2.

  That is, the rotation guide groove 3b and the guide pin 8 function as a regulating member that restricts the rotation range of the outer cylinder 3 relative to the inner shaft 2 to a necessary range, and improves the operability and workability of the sampler 1. . Incidentally, although the kind of material of the inner shaft main body 4 of the inner shaft 2, the insertion body 6, and the outer cylinder 3 is not ask | required, Preferably it is comprised from metal materials, such as stainless steel. Moreover, it is preferable that the outer cylinder 3 and the insertion body 6 have a smooth surface so that the movement resistance in the powder of the sampler 1 is reduced, and the surface of the outer cylinder 3 and the insertion body 6 is mirror-finished. Etc. may be performed.

Next, means for using the sampler 1 will be described.
The sampler 1 is first fully opened, and the powder in the container is inserted until the tip of the sampler 1 is positioned at the sampling target position in the mixer in which the powder in the state where the mixing operation has been completed is stored. Inserted. At this time, the tip of the sampler 1 is sharpened in a semiconical shape by the inner shaft 2 and the outer cylinder 3, so that the flow of the powder in the mixer is suppressed as much as possible, and the inside of the powder is smoothly It will be inserted into.

  Then, when gripping the grip 7 and rotating the outer cylinder 3 so that the sampler 1 changes from the fully open state to the closed state, the sample is collected in a state where the movement of the powder is minimized. The powder on the receiving surface 13 and the guide surface 14 that are target portions is enclosed and accommodated in the accommodating portion 17 so as to be enclosed in the inner periphery of the outer cylinder 2.

  Next, after the sampler 1 is extracted from the container, the sampler 1 is fully opened, and the powder in the housing portion 17 is collected as a sample. In this way, it is possible to collect a sample in which the mixed state is accurately reflected.

Next, a different point from the example mentioned above about another embodiment of this invention is demonstrated based on FIG.
FIGS. 7A to 7C are plan sectional views of the main part of the piercing body showing another embodiment of the present invention, respectively, and FIGS. 7D and 7E each show another embodiment of the present invention. It is a side view of a piercing body. FIG. 6A shows a connection in which the outer periphery of a circular cross section formed in the same manner as the circular cross section of the cylindrical portion 9 is cut out in a non-depressed shape, and the circular arc 12b is connected to both ends of the circular arc 12b. An example in which the receiving surface 13 described above is formed on the outer periphery of the receiver 12 by being formed so as to have a cross-sectional shape including the line 12c is shown.

  FIG. 5B shows an arcuate connection line 12d that connects the arc 12b and both ends of the arc 12b by notching the outer periphery of the circular section that is identical to the circular section of the cylindrical portion 9 in a non-depressed shape. An example in which the above-described receiving surface 13 is formed on the outer periphery of the receiving body 12 by being formed to have a cross-sectional shape consisting of

  In FIG. 5C, the outer periphery of the circular cross section of the same shape as the circular cross section of the cylindrical portion 9 is cut out in a non-depressed shape to connect the arc 12b and both ends of the arc 12b and the central portion protrudes into a convex shape. An example in which the receiving surface 13 is formed on the outer periphery of the receiver 12 by being formed to have a cross-sectional shape including the connecting line 12e is shown.

  FIG. 4D shows an example in which the receiving surface 13 is inclined and formed on the side opposite to the notch side with respect to the axis S of the inner shaft 2 toward the tip. Incidentally, the angle formed by the receiving surface 13 and the guide surface 14 in a side view is set to an angle larger than 90 ° and the powder smoothly flows from the receiving surface 13 to the guide surface 14. In addition, the angle formed by the guide surface 14 and the outer peripheral surface of the cylindrical portion 9 in a side view is set to an angle larger than 90 ° and the powder smoothly flows from the guide surface 14 to the outer peripheral side of the cylindrical portion 9. .

  In FIG. 5E, the guide surface 14 is not provided, and the side surface is inclined from the peripheral surface of the cylindrical portion 9 toward the tip of the piercing body 6 in the direction opposite to the notch side with respect to the axis S of the inner shaft. An example is shown in which a receiving surface 13 having a linear shape extending from the outer peripheral surface of the viewing cylindrical portion 9 to the tip of the insertion body 6 is formed.

  Next, a comparison experiment between the rod-shaped sampler 1 to which the present invention is applied and the conventional rod-shaped sampler 51 is performed, and based on the results, by using the rod-shaped sampler 1 of the present invention, the mixing state of the powder in the mixer Consider whether it is possible to perform accurate verification. FIG. 8A is a perspective view showing a configuration of a main part of a conventional rod sampler used in a comparative experiment, and FIG. 8B is a simplified diagram of a V-type mixer used in the comparative experiment.

  In this comparative experiment, the rod-shaped sampler 1 to which the present invention was applied was used as shown in FIGS. 1 to 6, and the conventional rod-shaped sampler 51 was used as shown in FIG.

  The configuration of the conventional rod sampler 51 shown in FIG. 8A will be described. The rod sampler 51 includes a cylindrical inner shaft 52 that extends linearly and an inner peripheral side of a cylindrical outer cylinder 53 that extends linearly. In addition, it is fitted and inserted so as to be movable in the axial direction. The inner shaft 52 is formed with an accommodating portion 54 that is a cylindrical space having a diameter slightly smaller than the diameter of the inner shaft 52 and having the same axis as the inner shaft 52, and the tip portion gradually approaches the distal end side. A conical insertion portion 56 having a small diameter is formed. The accommodating portion 54 has an opening 54a that is open on one semicircular side of the circular cross section, and opens and closes the opening 54a by sliding the outer cylinder 53 in the axial direction.

  The rod-like sampler 51 first slides the outer cylinder 53 to the base side to fully open the opening 54a. Subsequently, the rod-like sampler 51 is inserted into the powder in the container from the front side until the insertion portion 56 reaches the sampling target location in the mixer in which the powder for which the mixing operation has been completed is accommodated. . Subsequently, the outer cylinder 3 is slid to the front side so that the opening 54a changes from the fully open state to the most closed state. Subsequently, after the sampler 51 is extracted from the container, the opening 54a is fully opened, and the powder in the container 54 is collected as a sample.

  Further, the configuration of the V-type mixer 57 shown in FIG. 8B will be described. The V-type mixer 57 has a V-shape branched from the base portion toward the front portion and can be opened and closed at the front portion. The V-type confusion machine 57 as a whole is around the axis of the rotary shaft 59, with a shaft having a straight opening 58 extending straight in the branching direction in the middle portion between the base portion and the front portion. By being driven to rotate, the powder contained therein is mixed. Sample collection by the samplers 1 and 51 is performed through the opening 58.

  A comparative experiment was performed using the rod-shaped sampler 1 of the present invention configured as described above, the conventional rod-shaped sampler 51 and the V-type mixer 61. Specifically, first, a plurality of types of powders having different particle diameters were accommodated in the V-type mixer 61, and a mixing operation was performed for 5 minutes.

  Subsequently, the surface side portion (portion near the opening portion 58) of the powder accommodated in the V-type mixer 57 was collected with a handle through the opening portion 58.

  According to such a collecting means, since the flow of the powder at the time of collection is suppressed to the minimum, the sample reflects the accurate mixed state. For this reason, this sample was adopted as a standard for evaluating the sample collected by the rod-shaped sampler 1 of the present invention and the sample collected by the conventional sampler 1. By the way, if the surface side of the powder in the mixer is taken as a sample, the handle can be taken to accurately reflect the mixed state, but the handle can reach the bottom side in the mixer containing the powder. Is inserted, it is difficult to collect a sample that accurately reflects the mixing state of the mixer. Thus, since the collection location is limited, it is difficult to employ the handle as a sampler.

  As described above, the amount of the sample collected by the handle is 100 g. Thereafter, a 10 ml (5 g) sample is collected from the powder inside the V-type mixer 57 by the rod-shaped sampler 1 of the present invention. This operation was repeated 8 times, and 8 samples were collected. And what kind of particle diameter powder was contained in what ratio with respect to each of the sample for 1 time by the handle and the sample for 8 times by the rod-shaped sampler 1 of the present invention was examined.

  FIG. 9 is a list showing what kind of particle size powder is contained in what ratio with respect to each of the sample for one time with the handle and the sample for 8 times with the rod-shaped sampler of the present invention. It is a table. As shown in the figure, when the sample with the handle (denoted as “control” in the figure) and the sample with the rod-shaped sampler 1 (denoted as “n = 1 to 8” in the figure) were compared, they were almost in the same state. You can see that

  On the other hand, after taking a 100 g sample with a handle, a 10 ml (5 g) sample was taken from the powder inside the V-type mixer 57 with a conventional rod sampler 51, and this operation was repeated 8 times. 8 samples were collected. And what kind of particle diameter powder was contained in what ratio with respect to each of the sample for 1 time by the handle and the sample for 8 times by the conventional rod-shaped sampler 51 was investigated.

  FIG. 10 is a table showing what kind of particle size powder is contained in what proportion with respect to one sample with a handle and eight samples with a conventional rod sampler. It is. As shown in the figure, the sample using the rod-shaped sampler 51 (shown as “n = 1 to 8” in the figure) is a powder having a smaller particle size compared to the sample using the handle (shown as “control” in the figure). Is contained at a high rate, and it can be seen that the mixing state slightly changes when the rod-shaped sampler 51 is collected.

  11A is a graph showing the list of FIG. 9, and FIG. 11B is a graph showing the list of FIG. This figure also shows the same state as described above.

  Furthermore, FIG. 12 shows the ratio of the collected sample containing powder having a particle diameter of 75 μm or less for the handle, the rod-shaped sampler of the present invention, and the conventional rod-shaped sampler, respectively. According to the figure, in the sample collection by the rod-shaped sampler 1 of the present invention, the powder having a particle diameter of 75 μm or less is collected at substantially the same rate as the sample collection by the handle, while the conventional rod-shaped sampler 51 is used. In sample collection, powder having a particle size of 75 μm or less was collected at a higher rate than sample collection using the handle, indicating the superiority of the rod-shaped sampler 1.

  Incidentally, the reason why the results shown in FIGS. 9 to 12 are obtained is that in the conventional rod-shaped sampler 51, the powder moves so as to fall into the accommodating portion 54 at the time of sample collection. In this case, it is considered that the mixed state has changed. On the other hand, in the rod-shaped sampler 1 of the present invention, such movement of the powder is suppressed to the minimum for the reasons described above.

1 Rod sampler (sampler)
2 Inner shaft 3 Outer cylinder 3b Rotating guide groove (guide groove)
4 Inner shaft main body (main body, inner shaft main body)
6 Stab body (stab section)
7 Grip (grip)
8 Guide pin (guide piece)
13 Reception surface 14 Guide surface (joint surface, inclined surface)
17 Containment section

Claims (4)

An inner shaft (2) having a circular cross section, and an outer cylinder (3) fitted to the outer periphery of the circular cross section of the inner shaft (2) so as to be rotatable about the axis, ) And is inserted into the powder, and the outer cylinder (3) is rotated around the axis with respect to the inner shaft (2), so that the powder is accommodated and closed on the inner peripheral side of the outer cylinder (3). In the rod-shaped sampler that forms the container (17) and collects the powder, the outer periphery of the circular section of the piercing portion (6) of the inner shaft (2) is a non-recessed notch and is axially A receiving surface (13) extending along the tip is formed, and the receiving surface (13) is linear in the axial direction of the piercing portion (6), raised to a raised shape, and raised to an arc Or the rod-shaped sampler which has the shape which protruded in the shape of a convex, and forms the said accommodating part (17) with this receiving surface (13) and an outer cylinder (3) inner peripheral surface. The receiving surface (13) is extended to the tip side in parallel with the axis S of the inner shaft (2) in a side view, or the receiving surface (13) is cut toward the tip in a side view. The rod-shaped sampler according to claim 1, wherein the sampler is inclined on the side opposite to the notched side . A receiving surface (13), the circumferential surface and the inclined guide surface allowed to connect the circular cross section of the base end portion side of the receiving surface (13) (14) set only a said guide surface (14) and abutment ( The rod-shaped sampler according to claim 1 or 2, wherein a single surface having a U-shape in a side view is formed by 13) .   A grip portion (7) exposed from the outer cylinder (3) is formed at the base end of the inner shaft (2), a guide groove (3b) is formed in the outer cylinder (3), and the inner shaft (2) A guide piece (8) that engages with the guide groove (3b) is movably provided along the guide groove (3b), and the outer cylinder (3) is rotated by the guide groove (3b) and the guide piece (8). The rod-shaped sampler according to claim 1, 2 or 3, which regulates a moving range.

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