The present invention relates to a medicine supply device.
Japanese Patent Laying-Open No. 2014-144207 (PTL 1) is a prior art document that discloses a configuration of a medicine supply device. The medicine supply device described in PTL 1 includes a containing portion, a rotor, and a partitioning member. Block portions are provided on a side surface portion of the rotor and spaced from each other, and gaps between the block portions form medicine containing grooves. As the rotor rotates, part of the rotor contacts part of the partitioning member, to provide movement to the partitioning member and move a medicine on the partitioning member.
In the medicine supply device described in PTL 1, the rotor may stop when medicines get stuck between a portion of a circumferential surface of the rotor that is above a block portion and an inner surface of the containing portion.
The present invention has been made in view of the aforementioned problem, and an object of the present invention is to provide a medicine supply device capable of preventing the occurrence of remaining medicines in a medicine containing portion, and suppressing sticking of medicines in the medicine containing portion.
A medicine supply device based on a first aspect of the present invention includes a medicine containing portion, a rotor, a plurality of first protrusions, at least two second protrusions, and a partitioning portion. The medicine containing portion has a circumferential wall and a discharge port, and contains a medicine on an inner side of the circumferential wall and discharges the medicine through the discharge port. The rotor is rotatably disposed on the inner side of the circumferential wall, and has an upwardly convexly inclined top surface and a circumferential surface adjacent to the top surface. The plurality of first protrusions are provided on the circumferential surface and positioned with a gap between them in a circumferential direction of the rotor. The at least two second protrusions are provided on the circumferential surface, each of the at least two second protrusions being disposed above each of at least two first protrusions of the plurality of first protrusions. The partitioning portion is provided to extend from an inner surface of the circumferential wall toward the circumferential surface so as to partition between the at least two first protrusions and the at least two second protrusions above the discharge port. Each of the plurality of first protrusions is formed to be capable of, upon rotation of the rotor, pressing a medicine contained in the gap and conveying the medicine to the discharge port. Each of the at least two second protrusions is formed to be capable of, upon rotation of the rotor, pressing a medicine located on the partitioning portion and moving the medicine from over the partitioning portion. Each of the at least two second protrusions has, on one side in the circumferential direction, a one-side upper surface inclined downward to one side in the circumferential direction.
In one embodiment of the present invention, each of the at least two second protrusions further has, on the other side in the circumferential direction, an other-side upper surface inclined downward to the other side in the circumferential direction.
In one embodiment of the present invention, in each of the at least two second protrusions, an upper surface including the one-side upper surface and the other-side upper surface is inclined downward toward its tip end in a radial direction of the circumferential surface.
In one embodiment of the present invention, in the circumferential direction, an overall length of each of the at least two second protrusions is shorter than an overall length of each of the at least two first protrusions.
In one embodiment of the present invention, the partitioning portion is formed of a flexible member.
A medicine supply device based on a second aspect of the present invention includes a medicine containing portion, a rotor, a plurality of first protrusions, one second protrusion, and a partitioning portion. The medicine containing portion has a circumferential wall and a discharge port, and contains a medicine on an inner side of the circumferential wall and discharges the medicine through the discharge port. The rotor is rotatably disposed on the inner side of the circumferential wall, and has an upwardly convexly inclined top surface and a circumferential surface adjacent to the top surface. The plurality of first protrusions are provided on the circumferential surface and positioned with a gap between them in a circumferential direction of the rotor. The one second protrusion is provided on the circumferential surface and disposed above one first protrusion of the plurality of first protrusions. The partitioning portion is provided to extend from an inner surface of the circumferential wall toward the circumferential surface so as to partition between the one first protrusion and the one second protrusion above the discharge port. Each of the plurality of first protrusions is formed to be capable of, upon rotation of the rotor, pressing a medicine contained in the gap and conveying the medicine to the discharge port. The one second protrusion is formed to be capable of, upon rotation of the rotor, pressing a medicine located on the partitioning portion and moving the medicine from over the partitioning portion. The one second protrusion has, on one side in the circumferential direction, a one-side upper surface inclined downward to one side in the circumferential direction.
According to the present invention, the occurrence of remaining medicines in the medicine containing portion can be prevented, and sticking of medicines in the medicine containing portion can be suppressed.
A medicine supply device according to each embodiment of the present invention will be described hereinafter with reference to the drawings. In the following description of the embodiments, the same or corresponding portions in the drawings are denoted by the same reference characters and description thereof will not be repeated.
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Each of the plurality of first protrusions 122 is formed to be capable of, upon rotation of rotor 120, pressing a medicine contained in gap 124 and conveying the medicine to discharge port 112. Specifically, as rotor 120 rotates, the medicine contained in gap 124 is conveyed in the circumferential direction of rotor 120 while being pressed by first protrusions 122, and falls to discharge port 112.
At least two second protrusions 123 are further provided on circumferential surface 121. Specifically, one second protrusion 123 is disposed above each of at least two first protrusions 122 of the plurality of first protrusions 122. As shown in
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In the present embodiment, second protrusion 123 further has, on the other side in the circumferential direction of rotor 120, an other-side upper surface 123c inclined downward to the other side in the circumferential direction of rotor 120. Second protrusion 123 does not necessarily need to have other-side upper surface 123c. In this case, one-side upper surface 123b may extend over the entire upper surface of second protrusion 123.
Second protrusion 123 has a horizontally positioned lower surface. In the present embodiment, second protrusion 123 has a triangular outer shape with rounded apexes as seen in the radial direction of rotor 120.
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In the present embodiment, partitioning portion 140 is formed of a flexible member. Specifically, as shown in
Operation of medicine supply device 100 according to the first embodiment of the present invention is now described.
As rotor 120 rotates with medicines put in medicine containing portion 110, the medicines located on top surface 126 move toward a space between the inner surface of circumferential wall 111 and circumferential surface 121 of rotor 120. As rotor 120 rotates, the plurality of grooves 127 shake the medicines located on top surface 126, to facilitate the movement of the medicines to the aforementioned space.
Some of the medicines that have moved to the aforementioned space are contained in gaps 124, such that one medicine is contained in each gap 124. As rotor 120 rotates, the medicines contained in gaps 124 are conveyed in the circumferential direction of rotor 120 while being pressed by first protrusions 122. A medicine contained in gap 124 located above and in communication with discharge port 112 falls to discharge port 112 from within gap 124 and is dispensed.
At this time, gap 124 in communication with discharge port 112 is covered with partitioning portion 140, so as to prevent entry of medicines from above. As a result, one medicine can be dispensed at a time through discharge port 112.
As rotor 120 rotates, medicines located on partitioning portion 140 are pressed by second protrusions 123 and moved from over partitioning portion 140. The medicines moved from over partitioning portion 140 are eventually contained in gaps 124 and conveyed to discharge port 112.
In the present embodiment, the forward rotation of rotor 120 causes a medicine to be dispensed through discharge port 112. When a medicine is not dispensed through discharge port 112 for a certain period of time during the forward rotation of rotor 120, rotor 120 repeats the backward rotation and the forward rotation. When a medicine is dispensed during the repeated backward rotation and forward rotation of rotor 120, rotor 120 performs the forward rotation again. When it is confirmed that a medicine has not been dispensed even after the backward rotation and the forward rotation of rotor 120 have been repeated multiple times, it is determined that all the medicines in medicine containing portion 110 have been discharged and no medicine is remaining in medicine containing portion 110, and rotor 120 stops.
Here, sticking of medicines in medicine containing portion 110 is described.
In medicine supply device 100 according to the first embodiment of the present invention, as shown in
Accordingly, if medicines 1 get caught between a portion of circumferential surface 121 that is above first protrusion 122 and the inner surface of circumferential wall 111, these caught medicines 1 can be pressed by one-side upper surface 123b with the forward rotation of rotor 120. Medicines 1 pressed by one-side upper surface 123b are picked up by second protrusion 123, to move out of the state of being caught between circumferential wall 111 and circumferential surface 121.
Since medicine supply device 100 has at least two second protrusions 123, medicines 1 caught between circumferential wall 111 and circumferential surface 121 can be released by at least two second protrusions 123 each time rotor 120 performs one rotation. Thus, sticking of medicines 1 in medicine containing portion 110 can be suppressed.
As described above, in medicine supply device 100 according to the first embodiment of the present invention, the occurrence of remaining medicines in medicine containing portion 110 can be prevented, and sticking of medicines 1 in medicine containing portion 110 can be suppressed.
In medicine supply device 100 according to the first embodiment of the present invention, second protrusion 123 further has, on the other side in the circumferential direction of rotor 120, other-side upper surface 123c inclined downward to the other side in the circumferential direction of rotor 120.
Accordingly, if medicines 1 get caught between the portion of circumferential surface 121 that is above first protrusion 122 and the inner surface of circumferential wall 111, these caught medicines 1 can be pressed by other-side upper surface 123c with the backward rotation of rotor 120. Medicines 1 pressed by other-side upper surface 123c are picked up by second protrusion 123, to move out of the state of being caught between circumferential wall 111 and circumferential surface 121. Therefore, sticking of medicines 1 in medicine containing portion 110 can be suppressed during both the forward rotation and the backward rotation of rotor 120.
In medicine supply device 100 according to the first embodiment of the present invention, the upper surface including one-side upper surface 123b and other-side upper surface 123c of second protrusion 123 is inclined downward toward its tip end in the radial direction of circumferential surface 121. Therefore, climbing of medicines 1 onto second protrusion 123 can be suppressed, and medicines 1 caught between circumferential wall 111 and circumferential surface 121 can be readily picked up, so that sticking of medicines 1 in medicine containing portion 110 can be effectively suppressed.
In medicine supply device 100 according to the first embodiment of the present invention, the overall length of second protrusion 123 is shorter than the overall length of first protrusion 122. Therefore, as compared to an example where second protrusion 123 has a similar shape to first protrusion 122, the volume of second protrusion 123 in medicine containing portion 110 can be reduced, to increase the number of medicines 1 contained in medicine containing portion 110.
In medicine supply device 100 according to the first embodiment of the present invention, partitioning portion 140 is formed of a flexible member. Therefore, a load applied to medicine 1 can be reduced when medicine 1 located on first protrusion 122 is pressed by second protrusion 123 and caught between second protrusion 123 and partitioning portion 140, to suppress damage to medicine 1.
A medicine supply device according to a second embodiment of the present invention will be described hereinafter with reference to the drawings. As the medicine supply device according to the second embodiment of the present invention is different from medicine supply device 100 according to the first embodiment of the present invention in that the number of second protrusions is one, description of the configuration similar to that of medicine supply device 100 according to the first embodiment of the present invention will not be repeated.
One second protrusion 123 is provided on circumferential surface 121 of a rotor 220 of the medicine supply device according to the second embodiment of the present invention. As shown in
In the medicine supply device according to the second embodiment of the present invention, too, the occurrence of remaining medicines in medicine containing portion 110 can be prevented, and sticking of medicines 1 in medicine containing portion 110 can be suppressed. In addition, since the number of second protrusions 123 is one, the number of medicines 1 contained in medicine containing portion 110 can be increased, as compared to medicine supply device 100 according to the first embodiment in which one second protrusion 123 is disposed above each of the plurality of first protrusions 122.
A medicine supply device according to a third embodiment of the present invention will be described hereinafter with reference to the drawings. As the medicine supply device according to the third embodiment of the present invention is different from medicine supply device 100 according to the first embodiment of the present invention in terms of the shape of the second protrusion, description of the configuration similar to that of medicine supply device 100 according to the first embodiment of the present invention will not be repeated.
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Between first protrusion 122 and second protrusion 323 aligned in the vertical direction, passage 125 through which partitioning portion 140 passes during rotation of rotor 320 is provided. In the vertical direction, passage 125 has a width dimension slightly larger than a thickness dimension of partitioning portion 140. Second protrusion 323 is formed to be capable of, upon rotation of rotor 320, pressing a medicine located on partitioning portion 140 and moving the medicine from over partitioning portion 140.
Second protrusion 323 has, on one side in a circumferential direction of rotor 320, a one-side upper surface 323b inclined downward to one side in the circumferential direction of rotor 320.
In the present embodiment, second protrusion 323 further has, on the other side in the circumferential direction of rotor 320, an other-side upper surface 323c inclined downward to the other side in the circumferential direction of rotor 320.
Second protrusion 323 has a horizontally positioned lower surface. In the present embodiment, second protrusion 323 has an isosceles trapezoidal shape with rounded apexes as seen in a radial direction of rotor 320.
In second protrusion 323, an upper surface 323a including one-side upper surface 323b and other-side upper surface 323c is inclined downward toward its tip end in the radial direction of circumferential surface 121. That is, second protrusion 323 has a tapered shape. A portion of an upper surface of second protrusion 323 that is located between one-side upper surface 323b and other-side upper surface 323c continues to top surface 126.
In the circumferential direction of rotor 320, an overall length of second protrusion 323 is shorter than the overall length of first protrusion 122. The overall length of second protrusion 323 refers to a length of second protrusion 323 at its longest point in the circumferential direction of rotor 320. The overall length of second protrusion 323 is longer than the overall length of second protrusion 123 according to the first embodiment.
In the medicine supply device according to the third embodiment of the present invention, too, the occurrence of remaining medicines in medicine containing portion 110 can be prevented, and sticking of medicines 1 in medicine containing portion 110 can be suppressed.
In addition, since the overall length of second protrusion 323 is longer than the overall length of second protrusion 123 according to the first embodiment, the inclination of each of one-side upper surface 323b and other-side upper surface 323c can be made more gentle. Therefore, the medicine supply device according to the third embodiment of the present invention can readily pick up medicines 1 caught between circumferential wall 111 and circumferential surface 121, as compared to medicine supply device 100 according to the first embodiment, to effectively suppress sticking of medicines 1 in medicine containing portion 110.
It should be noted that the embodiments disclosed herein are illustrative in every respect, and do not serve as a basis for restrictive interpretation. Therefore, the technical scope of the present invention is defined based on the terms of the claims, rather than interpreted based on the above embodiments only, and encompasses all modifications within the scope and meaning equivalent to the terms of the claims.
1 medicine; 100 medicine supply device; 110 medicine containing portion; 111 circumferential wall; 112 discharge port; 113 opening; 120, 220, 320 rotor; 121 circumferential surface; 122 first protrusion; 123, 323 second protrusion; 123a, 323a upper surface; 123b, 323b one-side upper surface; 123c, 323c other-side upper surface; 124 gap; 125 passage; 126 top surface; 127 groove; 128 columnar portion; 129 cover; 130 lid portion; 140 partitioning portion; 150 connecting shaft portion.
Number | Date | Country | Kind |
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2019-158827 | Aug 2019 | JP | national |
Filing Document | Filing Date | Country | Kind |
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PCT/JP2020/024624 | 6/23/2020 | WO |