JP2006152731A - Medicine feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medicine feeder of a simple structure which can securely raise or lower a float. <P>SOLUTION: The medicine feeder 10 comprises a case 12, the float 14, and a medicine cartridge 16. The case 12 is provided with an upper case 20, a lower case 22, and lids 24, 26. An insertion hole 14a to which a float support rod 25 is inserted is provided at the midsection of the float 14, and a packing 46 is provided on the top surface of the float 14. The packing is an elastic member, and is integrally molded in a shape that a truncated cone is placed on the top surface of a cylinder. Then four air vents 24a are provided at the nearly midsection of the lid 24, and the float support rod 25, which is inserted to the insertion hole 14a of the float 14, is attached to the midsection of the lid 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drug supply device for supplying water containing a drug.

  The medicine supply device is used by being installed in a flush toilet, for example. In a flush toilet equipped with a drug supply device, a drug supply device is installed to prevent adhesion of urine stones to the toilet and to disinfect, deodorize, and wash the toilet. Then, when the user uses the toilet, flush water is supplied to the toilet automatically or manually by the user, and water containing the medicine is supplied from the medicine supply device into the toilet. It has become.

  FIG. 10 is a schematic cross-sectional view showing the configuration and use state of a conventional medicine supply device 100. First, the structure of the conventional medicine supply device 100 will be described. As shown in the figure, the medicine supply device 100 includes a housing 102, a float 104, and a medicine container 106. The housing 102 has an air hole 110 that penetrates the ceiling surface 108 to the outside, and an inflow / outflow port 114 to which an elbow portion 118 is connected to the bottom surface 112. The casing 102 is provided with a substantially cylindrical float guide frame 116 toward the bottom surface 112 so as to surround an air hole 110 provided in the ceiling surface 108. A float 104 is reciprocally loaded in a hollow portion surrounded by the float guide frame 116. Further, a drug container 106 containing a desired drug is installed at a predetermined position of the housing 102.

  Next, the usage state of the conventional medicine supply device 100 will be described. As shown in FIG. 10, a main pipe 120 for supplying flush water to the toilet bowl B is connected to the upper part of the toilet bowl B. The main pipe 120 is connected to a branch pipe 122 that branches from the side surface and extends to the side. A substantially L-shaped elbow part 118 is connected to the other end of the flow dividing pipe 122. The other end of the elbow part 118 is connected to an inflow / outflow port 114 provided on the bottom surface of the medicine supply device 100. Thereby, the flush water is supplied from the main pipe 120 to the medicine supply device 100 through the branch pipe 122. Further, the water containing the medicine is discharged from the medicine supply device 100 through the branch pipe 122 to the main pipe 120 and supplied to the toilet B.

  In the configuration of the medicine supply device 100, when flush water is supplied from the main pipe to the toilet B, a part of the flush water flows from the main pipe 120 through the branch pipe 122 into the housing 102 of the medicine supply apparatus 100. Is done. The float 104 is raised toward the ceiling surface 108 along the inner surface of the hollow portion of the float guide frame 116 due to the rise of the level of flush water flowing into the housing 102. And when the upper part reaches | attains the ceiling surface 108, the air hole 110 is obstruct | occluded. In addition, the drug in the drug container 106 is dissolved in water while gradually invading through the spongy body 124 as water flows into the housing 102.

  When the air hole 110 is blocked by the float 104, the pressure inside the housing 102 increases, and the flow of flush water into the housing 102 is stopped. The flush water supplied to the toilet bowl B is stopped after a predetermined time has elapsed. When the supply of flush water from the main 120 to the toilet B is stopped, when the flush water in the main 120 disappears, the water containing the medicine accumulated in the housing 102 flows out from the inflow / outlet 114. The The discharged water flows into the main pipe 120 through the branch pipe 122 and is supplied into the toilet bowl B.

Such a medicine supply device is disclosed in Patent Document 1 below, for example.
Japanese Patent No. 2417514

  However, in the medicine supply device 100 described above, since the contact area between the side surface of the float 104 and the inner surface of the hollow portion of the guide frame 116 is large, when the float 104 is lifted, it can be used or squeezed on the way. There was a case where it didn't move. When the float 104 stops moving on the way, there is a problem that the air hole 110 cannot be blocked by the float 104 and the flush water leaks from the air hole 110 to the outside. In addition, when dust or moss adheres to the surface of the float guide frame 116 or the float 104, or when dust or the like enters the hollow portion of the float guide frame 116, there are the same problems as described above. In addition, when the water containing the medicine is discharged from the toilet medicine supply device 100, the float 104 may be used halfway or stagnate and may not descend, causing a failure.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a medicine supply device that has a simple structure and can reliably raise or lower the float.

  In order to solve the above problems, a drug supply device according to the present invention stores a drug dissolved by a fluid flowing in from a fluid supply pipe, and supplies the fluid containing the dissolved drug to the fluid supply pipe by flowing out. A medicine supply device that is connected to the fluid supply pipe and stores the fluid that has flowed into the inside of the medicine supply device, and a support rod provided in the casing so as to extend vertically. An air hole provided on an upper surface portion of the housing and capable of communicating with the outside of the housing; and a float formed with an insertion hole into which the support rod is inserted and capable of being raised or lowered along the support rod. The float rises with an increase in the water level of the fluid that has flowed in, and the inside of the housing is sealed by closing the air hole, and the inflow of fluid from the fluid supply pipe is stopped. It is characterized by that.

  According to the medicine supply device of the present invention, it is possible to prevent water leakage by raising or lowering the float with a simple structure and with certainty.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. This Embodiment demonstrates the chemical | medical agent supply apparatus used by installing in a flush toilet.

  First, the configuration of the medicine supply device 10 according to the present embodiment will be described. 1 is a perspective view showing an external configuration of a medicine supply device 10 according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of the medicine supply device 10 with a cover removed, and FIG. 3 is a medicine supply device. FIG. 4 is a schematic cross-sectional view of FIG. 10, and FIG.

  As shown in FIGS. 1 to 4, the medicine supply device 10 according to the present embodiment includes a housing 12, a float 14, and a medicine cartridge 16.

  The housing 12 includes an upper housing 20, a lower housing 22, and lids 24 and 26, each of which is integrally formed of a plastic material.

  The housing 12 forms an area that is a cylindrical float housing space capable of housing the float 14 by the upper housing 20, and can accommodate the drug cartridge 16 by the upper housing 20 and the lower housing 22. A region that is a cylindrical medicine cartridge housing space is formed inside.

  In addition, a disk-shaped float support portion 28 for supporting the lower end of the float 14 is provided at the lower portion of the float housing space of the upper housing 20. Further, as shown in detail in FIG. 4, a female screw portion 29 to be fitted with a male screw portion 24 d of the lid 24 described later is provided in the upper portion of the float housing space of the upper housing 20. In the present embodiment, the float support portion 28 is provided with a plurality of holes 28a. The float 14 is configured to rise or fall when water enters and exits from the hole 28a. In addition, the float support portion 28 defines the range of strokes of the float 14 rising and lowering. In the present embodiment, the float support portion 28 is provided at a position where the stroke length of the float 14 is 2 to 3 mm. ing.

  Further, as shown in detail in FIG. 4, a female screw portion 30 to be fitted with a male screw portion 26 a of the lid 26 described later is provided in the upper portion of the medicine cartridge housing space of the upper housing 20. Further, a step portion 31 for holding the medicine cartridge 16 is provided on the inner side of the female screw portion 30 by placing a flange 16a of the medicine cartridge 16 described later. Further, as shown in FIG. 2, an upper flange 32 that is fastened to a lower flange 38 of the lower housing 22 described later is formed at the lower portion of the upper housing 20.

  The lower housing 22 has a track-like long cylindrical shape, and forms a space in which flush water can be stored. And the connecting pipe 34 which can connect the diversion pipe | tube 122 through which flush water passes is shape | molded in the lower center part outer side. In addition, an inflow / outflow pipe 36 that communicates with the connecting pipe 34 and allows flush water to flow into the lower casing 22 is formed inside the lower central portion of the lower casing 22. Further, as shown in FIG. 2, a lower flange 38 that is fastened to the upper flange 32 is formed on the upper portion of the lower housing 22. The inflow / outflow pipe 36 is provided with a rectifying plate 18 for rectifying the inflow state of the flush water. Thus, the flush water is supplied from the main pipe 120 through the branch pipe 122 into the lower housing 22.

  As shown in FIG. 5, the rectifying plate 18 has a plate shape, and one end thereof is attached to the side surface portion of the inflow / outflow pipe 36. The other end is attached to the inner surface of the lower housing 22. Accordingly, the flush water that has flowed in from the inflow / outflow port 36 a of the inflow / outflow pipe 36 proceeds along the rectifying plate 18. The flush water that has flowed in flows into the lower housing 22 and flows around the drug cartridge 16 while swirling.

  As shown in detail in FIGS. 2 to 4, the lid 24 is provided with four air holes 24 a at a substantially central portion thereof. Further, a vertical wall 24b that comes into contact with a packing 46 of the float 14 described later is provided at a position surrounding the air hole 24a on the lower surface side of the lid 24. The vertical wall 24b is formed in a cylindrical shape so as to surround the air hole 24a.

  A float support rod 25 to be inserted into an insertion hole 14 a of the float 14 described later is attached to the center of the lid 24. In the present embodiment, the float support rod 25 is formed of a metal or plastic material and attached to the lid 24 with a nut.

Further, on the outer side of the lower part of the lid 24, a male screw part 24d fitted with the female screw part 29 provided in the upper part of the float housing space of the upper housing 20 described above is provided. In the present embodiment, an O-ring 42 for sealing the upper portion of the float housing space of the upper housing 20 and the lid 24 is disposed between the upper portion of the float housing space of the upper housing 20 and the lid 24. ing. Therefore, it can seal by screwing the lid | cover 24 in the upper part of the float accommodation space of the upper housing | casing 20. FIG.

  As shown in detail in FIGS. 3 and 4, the lid 26 is provided with a male screw portion 26 a that fits with a female screw portion 30 provided in the upper portion of the medicine cartridge housing space of the upper housing 20 on the outer side of the lower portion thereof. It has been. In the present embodiment, an O-ring 42 for sealing the upper part of the medicine cartridge housing space of the upper housing 20 and the lid 26 is provided between the upper part of the medicine cartridge housing space of the upper housing 20 and the lid 26. Has been placed. Therefore, it can seal by screwing the lid | cover 26 on the upper part of the medicine cartridge accommodation space of the top housing | casing 20. FIG.

  The float 14 has a specific gravity smaller than that of water and is formed into a cylindrical shape using a foam material that is a material that floats on water. In addition, an insertion hole 14a into which the float support rod 25 is inserted is provided at the center. The insertion hole 14a is formed vertically from the center of the upper surface of the float 14 to the lower surface through the center of gravity. In the present embodiment, the lengths of the float 14 and the float support rod 25 have lengths that can be reliably raised or lowered when they are raised or lowered by the flush water that is introduced. In addition, the float 14 is held in a region that is a float accommodation space by a float support portion 28 that supports the lower end of the float 14.

  Further, a packing 46 integrally formed in a shape in which a truncated cone is placed on the upper surface of a column is provided by an elastic member on the upper surface portion of the float 14. The packing 46 can press-contact the vertical wall 24b of the lid 24 and close the air hole 24a of the lid 24 as the float 14 moves up. In the present embodiment, an elastic member such as rubber is used for the packing 46.

  The medicine cartridge 16 is integrally formed in a lattice shape with a plastic material. And the space which can accommodate the chemical | medical agent Y is formed in the grid | lattice inside. In the present embodiment, the medicine cartridge 16 has a space in which four cylindrical medicines Y can be stacked and accommodated.

  Further, a flange 16 a is provided on the entire periphery of the medicine cartridge 16. The flange 16a can be accommodated in the region by placing the flange 16a on the step 31 at the upper part of the region, which is the medicine cartridge housing space of the upper housing 20. Further, the peripheral surface of the medicine cartridge 16 is provided with a plurality of grid-like columns 16b extending from the flange 16a to the bottom surface side as shown in FIG. Therefore, flash water can enter from the gap. In the present embodiment, as shown in FIG. 3, flush water is always stored in the lower housing 22 up to the height of the inflow / outflow port 36a of the inflow / outflow pipe 36 (reference numeral W1 in FIG. 3). Water level). This is because a part of the medicine Y accommodated in the medicine cartridge 16 is always immersed in the flush water. Thereby, in the lower housing | casing 22, the water by which the chemical | medical agent Y was melt | dissolved can always be stored.

  The upper housing 20 and the lower housing 22 are integrally assembled by fastening the upper flange 32 and the lower flange 38 using bolts 40. An O-ring 44 for sealing the upper flange 32 and the lower flange 38 is disposed between the upper flange 32 and the lower flange 38 on the entire circumference. Thereby, the upper housing | casing 20 and the lower housing | casing 22 can be sealed.

  An installation state of the medicine supply device 10 configured as described above will be described. As shown in FIG. 1, a main pipe 120 for supplying flush water to the toilet bowl B is connected to the upper part of the toilet bowl B. The main pipe 120 is connected to a branch pipe 122 that branches from the side surface and extends to the side. The other end of the branch pipe 122 serving as a water (fluid) supply pipe to the housing 12 is connected to a connection pipe 34 provided on the lower surface of the lower housing 22. Thereby, the flush water is supplied from the main pipe 120 through the branch pipe 122 to the casing 12 of the medicine supply apparatus 10. The water containing the medicine is discharged from the medicine supply device 10 through the branch pipe 122 to the main pipe 120 and supplied to the toilet B.

  Next, the usage state of the medicine supply device 10 installed in the toilet bowl B will be described in detail below. As shown in FIG. 6, when the user uses the toilet B, flush water is supplied from the main 120 to the toilet B automatically or when the user presses a flush button (not shown). (The direction of arrow F in FIG. 6). Next, when the flush water is supplied to the toilet B, a part of the flush water flows from the main pipe 120 through the branch pipe 122 to the connection pipe 34 (in the direction of arrow F2 in FIG. 6). Then, the flush water that has flowed into the connection pipe 34 passes through the inflow / outflow pipe 36 and is supplied into the lower housing 22 of the medicine supply device 10 (in the direction of arrow F3 in FIG. 6).

  As shown in FIG. 5, the flush water that has flowed into the lower housing 22 is rectified by the current plate 18 and flows along the inner surface of the lower housing 22. At this time, the flush water flows around the medicine cartridge 16 while swirling (direction of arrow shown in FIG. 5). Thereby, the medicine Y accommodated in the medicine cartridge 16 becomes easier to melt. Further, the drug Y is gradually dissolved from the surface by the water that flows in while swirling.

  Next, the flush water that has flowed into the lower housing 22 gradually raises the water level in the housing 12, as shown in FIG. The water in the housing 12 enters the area that is the float accommodation space from the plurality of holes 28 a of the float support portion 28. As a result, the float 14 is pushed up by its buoyancy and is gradually raised along the float support rod 25. Then, as the flush water that has flowed up rises to a predetermined water level (the water level indicated by reference sign W2 in FIG. 6), the float 14 rises until it reaches the vertical wall 24b of the lid 24 as shown in FIG. As a result, the packing 46 provided on the upper portion of the float 14 is in pressure contact with the vertical wall 24b of the lid 24 and closes the air hole 24a of the lid 24.

  When the air hole 24a is blocked by the float 14, the pressure inside the housing 12 of the medicine supply device 10 rises and the inflow of flush water is stopped. The flush water supplied to the toilet bowl B is stopped after a predetermined time has elapsed. When the supply of flush water from the main 120 to the toilet B is stopped and the flush water in the main 120 is exhausted, the medicine accumulated in the housing 12 of the medicine supply device 10 is contained as shown in FIG. Waste water flows out from the inflow / outflow port 36a of the inflow / outflow pipe 36 (see arrow S1 in FIG. 7). The float 14 returns to the initial position while descending along the float support rod 25 when a predetermined amount of water containing the chemical is discharged from the inflow / outflow pipe 36 (the water level indicated by reference numeral W3 in FIG. 7). Further, the water flowing out from the inflow / outflow pipe 36 flows into the main pipe 120 through the branch pipe 122 (see arrow S2 in FIG. 7). Thereby, the water containing the medicine is supplied into the toilet bowl B. At this time, the water containing the medicine stored in the housing 12 gradually lowers the water level, and the water flows out to the height of the inflow / outflow port 36a of the inflow / outflow pipe 36 (reference numeral W4 in FIG. 7). Water level). And in the lower housing | casing 22, the water to the height of the inflow / outflow port 36a is always stored.

  As described above, according to the medicine supply device 10 according to the present embodiment described in detail, the center of gravity of the float 14 is configured to be substantially on the center line of the float support rod 25. Thus, the float 14 can reduce lateral deflection when rising or lowering. As a result, the float 14 can rise or fall smoothly without stagnation when rising or lowering due to the rise or fall of the flush water level. Further, since the float 14 rises smoothly and reliably blocks the air holes 24a, water leakage can be prevented.

  Further, in the medicine supply device 10 according to the present embodiment, since the contact area between the surface of the insertion hole 14a of the float 14 and the surface of the float support rod 25 is small, it can be smoothly raised or lowered without being caught. It becomes possible.

  Further, in the medicine supply device 10 according to the present embodiment, the float support rod 25 is arranged on the upper surface side of the float 14 and is configured not to contact the flush water that has flowed into the housing 12. Thereby, it is possible to reduce the amount of dirt and moss attached to the surface, and to prevent dust and the like from entering the insertion hole 14a of the float 14. With this configuration, the float 14 can be raised or lowered smoothly.

  Further, in the present embodiment, the lower end of the stroke of the float 14 is defined by the float support portion 28, and the stroke length of the float 14 is set to 2 to 3 mm. The longer the stroke length, the higher the possibility of catching in the middle. Therefore, according to this embodiment, a stable float stroke is realized even if the stroke length is shortened.

In the present embodiment, the float 14 and the vertical wall 24b around the air hole 24a are pressed against each other via the packing 46, which is an elastic member, so as to close the air hole 24a. The inside of the body 12 can be sealed to stop the inflow of water.

  In the present embodiment, it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, in the present embodiment, the lid 22 is provided with four air holes 22a, but an arbitrary number of air holes may be provided as necessary.

  Moreover, in this Embodiment, although tap water was used as the flush water used for the chemical | medical agent supply apparatus 10, other fluids, for example, the water etc. which reused waste_water | drain, may be used.

  In the present embodiment, four drugs are stored in the drug cartridge 14, but a desired number of drugs may be stored as appropriate.

  Further, in the present embodiment, by providing the inflow / outflow port 36a at the upper part of the inflow / outflow pipe 36, water is always stored in the lower housing 22, and a part of the medicine Y is always immersed in flush water. However, the inflow / outflow port 36a may be provided on the bottom surface of the lower housing 22 so that all the water in the lower housing 22 flows out.

  Further, in the present embodiment, a packing 46 of an elastic member integrally formed in a shape in which a truncated cone is placed on the upper surface of a cylinder is provided on the upper surface portion of the float 14 and is brought into contact with the vertical wall 24 b of the lid 24. However, the present invention is not limited to this, as long as the air hole 24a of the housing can be reliably closed by raising the float. For example, as shown in FIG. 8A, a packing formed in a cylindrical shape with an elastic member is provided at the center of the upper surface of the float, and the air hole is closed by contacting the lower surface of the lid. May be. Further, as shown in FIG. 8B, a packing may be provided around the air hole of the lid, and the air hole may be closed by bringing the upper surface of the float into contact with the packing. Also, as shown in FIG. 8 (c), the upper surface of the float is provided with a convex portion integrally formed in a shape in which a circular column and a truncated cone are placed on the upper surface, and elastic provided around the air hole of the lid. You may comprise so that an air hole may be obstruct | occluded by making it contact | abut to the vertical wall (packing) shape | molded by the member.

  In the present embodiment, the float stroke length is set to 2 to 3 mm. However, the present invention is not limited to this, and if the stroke length is 1 to 5 mm, the float is reliably and stably floated. Can be raised and lowered. Even with a stroke length of about 1 to 10 mm, a stable stroke is possible.

  In the present embodiment, the support rod that supports the float so as to be movable in the vertical direction is configured to pass through the center of gravity of the float. However, the support rod may be configured to pass through a portion that is off the center of gravity. As the distance from the center of gravity deviates, there is a risk of adversely affecting the rise and descent stability of the float, but it is possible to obtain higher stability compared to a conventional configuration in which the entire outer periphery of the float is supported by a float frame.

  In the present embodiment, the medicine supply device installed in the flush toilet has been described as an example. However, the present invention is not limited to this, and supplies a fluid in which medicine is dissolved, such as a sink or a drain pipe of a bathtub. If it is a facility with necessity, the chemical | medical agent supply apparatus which concerns on this invention is applicable.

(Second Embodiment)
Next, a second embodiment according to the present invention will be described. FIG. 9 is a schematic cross-sectional view of a medicine supply device 200 according to the second embodiment of the present invention. In the first embodiment, the float support rod 25 is attached to the lid 24 and inserted from the top surface of the float 14, whereas in the second embodiment, the float support portion 222 is placed on the top surface. A major feature is that the float support bar 222b is provided and is inserted from the lower surface of the float 216. Therefore, the configuration other than the above configuration is the same as that of the first embodiment, and the same configuration is denoted by the same reference numeral and description thereof is omitted. Moreover, since the usage state of the chemical | medical agent supply apparatus 200 is the same as that of the chemical | medical agent supply apparatus 10 of 1st Embodiment, description is abbreviate | omitted.

  As shown in FIG. 9, the medicine supply device 200 according to the present embodiment includes a casing 210, a float 216, and a medicine cartridge 16.

  The casing 210 includes an upper casing 212, a lower casing 214, and lids 218 and 26, each of which is integrally formed of a plastic material.

  The housing 210 forms an area which is a cylindrical float housing space capable of housing the float 216 by the upper housing 212, and can accommodate the drug cartridge 16 by the upper housing 212 and the lower housing 214. A region that is a cylindrical medicine cartridge housing space is formed inside.

  In addition, a disk-shaped float support portion 222 for supporting the lower end of the float 216 is provided in the lower portion of the float housing space of the upper housing 212. In addition, the float support portion 222 is provided with a plurality of holes 222a through which water, which will be described later, passes. In addition, a float support bar 222b that is inserted into an insertion hole 216a of a float 216, which will be described later, is provided at the center on the upper surface side of the float support portion 222. In addition, an upper flange 32 that is fastened to a lower flange 38 of a lower housing 214 described later is formed at the lower portion of the upper housing 212. In the present embodiment, the float support portion 222 is provided with a plurality of holes. The float 216 is configured to rise or fall when water enters and exits from the hole.

  The lid 218 is provided with four air holes 218a at the center thereof. Further, a vertical wall 218b that comes into contact with a packing 224 of a float 216, which will be described later, is provided at a position surrounding the air hole 218a on the lower surface side of the lid 218. The vertical wall 218b is formed in a cylindrical shape so as to surround the air hole 218a. Further, on the outer side of the lower surface of the lid 218, a male screw portion 218c that is fitted to the female screw portion 226 provided in the upper portion of the float housing space of the upper casing 212 described above is provided. In the present embodiment, an O-ring for sealing the upper portion of the float housing space of the upper housing 20 and the lid 24 is disposed between the upper portion of the float housing space of the upper housing 212 and the lid 218. Yes. Accordingly, the lid 218 can be screwed into the upper part of the float housing space of the upper housing 212 to be sealed.

  The float 216 has a specific gravity smaller than that of water and is integrally formed in a cylindrical shape with a foam material that is a material that floats on water. The float 216 has a height that can be raised or lowered by flush water that will be described later, in a region that is a cylindrical float accommodation space that can accommodate the float 216. In addition, an insertion hole 216a into which the float support bar 222b is inserted is provided at the center. In the present embodiment, the float 216 is formed longer than the float support bar 222b. In addition, the float 216 is held in a region that is a float accommodation space by a float support portion 222 that supports the lower end of the float 216.

  In addition, a packing 224 that is integrally formed in a shape in which a truncated cone is placed on the upper surface of a cylinder is provided on the upper surface of the float 216 by an elastic member. The packing 224 can press-contact the vertical wall 218b of the lid 218 by closing the float 216, and can block the air hole 218a of the lid 218 described above. In the present embodiment, an elastic member such as rubber is used for the packing 224.

  As described above, according to the medicine supply device 200 according to the present embodiment described in detail, the center of gravity of the float 216 is configured to be substantially on the center line of the float support rod 222b as in the first embodiment. Yes. Thus, the float 216 can reduce lateral deflection when rising or lowering. As a result, the float 216 can rise or fall smoothly without stagnation when the flush water level rises or falls. Moreover, since the float 216 rises smoothly and reliably blocks the air hole 218a, water leakage can be prevented.

  Although the second embodiment has been described above, it is needless to say that the embodiment of the present invention is not limited to these configurations. For example, in the present embodiment, the length of the float support rod 222b is slightly shorter than the float insertion hole 216a, but may be a length that allows the float 216 to be reliably raised or lowered.

FIG. 1 is a perspective view showing the configuration of the medicine supply device according to the first embodiment of the present invention. FIG. 2 is a schematic perspective view of the medicine supply device according to the first embodiment of the present invention with the cover removed. FIG. 3 is a schematic cross-sectional view of the medicine supply device according to the first embodiment of the present invention. FIG. 4 is an enlarged view of the upper part of the upper housing 20 according to the first embodiment of the present invention. 5 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a schematic cross-sectional view showing a use state according to the first embodiment of the present invention. FIG. 7 is a schematic cross-sectional view showing a use state according to the first embodiment of the present invention. FIG. 8 is a diagram illustrating a configuration in which an air hole is closed by an elastic member according to another embodiment. FIG. 9 is a schematic cross-sectional view of a medicine supply device according to the second embodiment of the present invention. FIG. 10 is a schematic cross-sectional view showing a configuration of a conventional medicine supply device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Drug supply device 12 Case 14 Float 16 Drug cartridge 18 Current plate 20 Upper case 22 Lower case 24 Lid 25 Float support rod 26 Lid 28 Float support part 34 Connection pipe 36 Inflow / outflow pipe 46 Packing

Claims (7)

A drug supply device that stores a drug dissolved by a fluid flowing in from a fluid supply pipe and supplies a fluid containing the dissolved drug to the fluid supply pipe.
A housing connected to the fluid supply pipe and storing the fluid flowing therein;
A support bar provided extending vertically in the housing;
An air hole capable of communicating with the outside of the housing provided on the upper surface of the housing;
An insertion hole into which the support rod is inserted, and a float that can be raised or lowered along the support rod; and
The float rises as the water level of the inflowing fluid rises, and the inside of the housing is sealed by closing the air hole, so that the inflow of fluid from the fluid supply pipe is stopped. A drug supply device characterized by the above.   An elastic member is provided on the upper surface of the float or the upper surface of the housing, and the upper surface of the float and the upper surface of the housing are pressed against each other via the elastic member so as to close the air hole. The drug supply device according to claim 1.   The drug supply device according to claim 1 or 2, wherein the insertion hole of the float is formed so as to pass through the center of gravity of the float.   The drug supply device according to any one of claims 1 to 3, wherein the fluid supply pipe is a branch pipe that branches from a main pipe through which a fluid flows and into which a part of the fluid flows.   The support rod is provided to extend downward from the upper surface of the housing, and the insertion hole of the float is formed downward from the upper surface of the float. The medicine supply device according to any one of the above.   The medicine supply device according to any one of claims 1 to 5, wherein the casing includes a float support portion that defines a lower end of a stroke of the float.   The drug supply device according to any one of claims 1 to 6, wherein the float support portion is provided at a position where a stroke length of the float is 1 to 10 mm.

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