JP2005095736A - Drain cup - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain cup which receives fluid discharged from a discharge hole of a filter and allows the fluid to a desired place. <P>SOLUTION: The drain cup 40 comprises a bottomed cylindrical cup body 41 having an opening part 46 with an upper portion opened and an internal space 48 formed therein, a hose 44 which extends downwardly from a bottom surface of the cup body 41 and has a second flow passage 50 communicating with the internal space 48 inside thereof, and a magnet 45 mounted on the opening part 46. A discharge hole 26 is inserted in the opening part 46 from a lower side of a filter 1 having a bottomed cylindrical case 3 with the discharge hole 26 to discharge the fluid inside formed therein, and the drain cup 40 is mounted on the case 3 by the magnet 45. The fluid discharged from the discharge hole is received, and allowed to flow outside from the flow rate of the hose 44. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drain cup for preventing scattering when a fluid is discharged from a filter used to filter a fluid such as oil, and more particularly to a spin-on having a metal case. The present invention relates to a drain cup used for a filter.

  A filter for filtering fluid such as oil includes, for example, a filter head formed in an engine case, a cylindrical case with a bottom that is detachable from the filter head, and a cylindrical filter disposed in the case. It is composed of elements (such filters are called “spin-on filters”). The filter head has an inflow hole and an outflow hole, and allows fluid introduced from the inflow hole to a space outside the filter element in the case to pass from the outer peripheral surface of the filter element to the inner peripheral surface. Then, it is filtered with the filter medium of the filter element to capture and remove solids contained in the fluid. The fluid that has passed through the filter element flows into the internal space of the filter element in a clean state from which solids and the like have been removed, and flows out from the internal space through the outflow holes. For this reason, when a certain amount of solid matter or the like is captured by this filter medium, the filter medium is clogged and the filter's filtering ability is lowered. Generally, it is necessary to periodically replace the filter element inside the filter.

When replacing the filter element, if the case is removed with the fluid accumulated inside, the fluid will flow out to the outside and splash around. In order to make it discharge | emit, it has a discharge hole in the lower part of a case (for example, refer patent document 1). Therefore, when replacing the filter element, it is necessary to first discharge the fluid accumulated in the filter to the outside through the discharge hole. The fluid discharged from the discharge hole is collected in a receiving tray such as a bucket prepared below the filter.
Heisei 9-173716

  However, depending on the installation location of the filter, etc., the installation location of the saucer is limited and work efficiency is deteriorated, or the fluid flowing out from the discharge hole is drowned, leaked, or scattered to the ground and peripheral devices, etc. There was a problem.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a drain cup that receives fluid discharged from a discharge hole of a filter and flows it out to a desired location.

  In order to solve the above-mentioned problems, a drain cup according to the present invention includes a bottomed cylindrical cup body having an opening with an upper opening and an internal space, and a bottom extending from the bottom surface of the cup body. A hose having a flow path (for example, the second flow path 50 in the embodiment) formed therein and a coupling member (for example, the magnet 45 in the embodiment) attached to the opening. Consists of This drain cup has a bottomed cylindrical housing (for example, the case 3 in the embodiment), and a drain hole is inserted into the opening from below the filter in which a drain hole for draining the internal fluid is formed in the housing. In addition, the coupling member is attached to the housing. Then, the fluid discharged from the discharge hole is received by the cup body and flows out from the flow path of the hose.

  The housing is preferably made of a metal material and the coupling member is preferably made of a magnet.

  In addition, the filter has a plug for closing the discharge hole, and a work window for inserting a tool for removing the plug into the internal space when the plug is removed from the discharge hole with the drain cup attached to the filter. It is preferable that it is formed in the side part of the cup main body.

  Alternatively, the drain cup is configured to have a plug removing portion that is attached to the cup body so as to be rotatable relative to the cup body in the axial direction, and when the drain cup is attached to the filter, the plug is removed. It is preferable that the plug is removed by engaging the plug with the plug and rotating the plug removal portion in the axial direction.

  At this time, it is preferable that the inner space below the cup body has a wire mesh that is captured when the plug is removed and dropped.

  Furthermore, it is preferable that the cup main body and the hose have an engaging portion that is loosely coupled and the cup main body and the hose are configured to be relatively rotatable in the axial direction in the engaging portion.

  Moreover, it is preferable to be comprised so that the hose for extension can be connected to the lower end part of a hose.

  When the drain cup according to the present invention is configured as described above, the drain hole is covered with the cup body, and the fluid discharged from the discharge hole is received by the cup body. Scattering can be prevented. Furthermore, since the fluid discharge path can be freely taken by the hose, there are less restrictions on the arrangement place of the receiving tray for receiving the discharged fluid, and work efficiency can be improved.

  In addition, a special mounting structure is not required by configuring the coupling member for attaching the drain cup according to the present invention as a magnet for a filter whose housing is made of a metal material, and it can also be used for existing filters. be able to.

  Further, by forming a work window in the cup body for inserting a tool for removing the plug attached to the discharge hole of the filter, the plug is removed and the fluid is discharged while the drain cup is attached to the filter. Therefore, the fluid can be reliably discharged without being scattered.

  Alternatively, by providing a plug removing portion for removing the plug from the drain cup, the plug can be removed with the drain cup attached to the filter, and the scattering of the fluid can be completely prevented.

  At this time, the removed plug can be easily taken out by having a wire mesh to be captured when the removed plug falls in the internal space below the cup body.

  Furthermore, the cup body and the hose are loosely coupled and attached so that they can rotate relative to each other, so that when removing the case from the filter, the hose does not rotate and does not twist even when the case is rotated.

  Further, by making it possible to connect the extension hose to the lower end portion of the hose, the restriction of the installation location of the receiving tray for receiving the discharged fluid is further reduced, and the working efficiency can be improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, as a filter 1 in which the drain cup according to the present invention is used, a spin-on filter will be described with reference to FIG. The filter 1 includes a filter head 2 and a case 3 having a bottomed cylindrical shape that is detachably attached to the filter head 2 and has an opening at the top and a closed bottom to form a space inside. The case 3 has a cylindrical shape with a bottom and is attached to an inner peripheral surface of a metal case member 4 and an opening at the top of the case member 4, and has a cylindrical shape in which a female screw portion 5a is formed on the inner peripheral surface. The female screw member 5 is constituted. An O-ring 13 is disposed at the upper end of the case 3, and when the case 3 is attached to the filter head 2, the internal fluid flows out to the outside in close contact with the filter head 2 and the case 3. It is sealed so that it does not.

  Further, a drain mounting hole 4a penetrating vertically is formed at the bottom of the case member 4, and the drain member 25 is fitted into the drain mounting hole 4a, and the drain member 25 and the case member 4 are joined by welding. Yes. For this reason, the gap between the drain member 25 and the drain mounting hole 4a is sealed by this welding. A drain hole 26 is formed in the drain member 25 so as to penetrate vertically. A plug 28 is screwed into a lower end opening of the drain hole 26. The plug 28 is provided with a seal member 29, and the lower end opening of the discharge hole 26 is closed by the plug 28 when the filter 1 is in use.

  On the other hand, a connecting portion 6 protruding downward is formed on the lower surface of the filter head 2. The connecting portion 6 has an outer cylindrical portion 7 and an inner cylindrical portion 8 and is formed in a double cylindrical shape. For this reason, a ring-shaped outer passage 9 extending in the vertical direction is formed between the inner peripheral surface of the outer cylindrical portion 7 and the outer peripheral surface of the inner cylindrical portion 8, and the upper portion of the outer passage 9 is formed outside the filter 1. It communicates with the inflow hole 10 that communicates, and the lower part is open. Further, an inner passage 11 is formed in the inner cylindrical portion 8 so as to extend vertically therethrough, and communicates with an outflow hole 12 communicating with the outside of the filter 1 in the upper portion, and the lower portion is opened.

  As shown in FIG. 2, the inner cylindrical portion 8 has a larger amount of protrusion below the outer cylindrical portion 7, and the portion of the inner cylindrical portion 8 protruding downward from the outer cylindrical portion 7 has a diameter larger than that of the upper portion 8a. A narrowed filter mounting portion 8b is formed. Further, a second seal surface 8c is formed on the lower surface of the upper portion 8a of the inner cylindrical portion 8 so that a gasket 20 of the filter element 14 described later contacts, and the second seal surface 8c and the lower surface of the outer cylindrical portion 7 are substantially the same. It is formed so as to be located on the same plane. Furthermore, a male screw portion 7 a is formed on the outer peripheral surface of the outer cylindrical portion 7. A first seal surface 2 a is formed on the lower surface of the filter head 2 on the outer peripheral side of the outer cylindrical portion 7 so that the O-ring 13 contacts with the case 3 attached to the filter head 2. Yes.

  The filter 1 configured as described above is configured to fit the filter head 2 and the case 3 by screwing the male screw portion 7a formed on the filter head 2 into the female screw portion 5a formed on the upper portion of the case 3. Can be combined. A filter element 14 is disposed in a space surrounded by the filter head 2 and the case 3 screwed together.

  The filter element 14 has a cylindrical inner tube 15 having a large number of small holes 15a formed on the circumferential surface thereof, and a cross-shaped chrysanthemum flower shape in which a filter paper is folded in a bellows shape on the outer peripheral surface of the inner tube 15 and wound into a cylindrical shape. The inner tube 15 and both ends of the filter medium 16 in the cylindrical axial direction are sandwiched between a disc-shaped upper end plate 17 and lower end plate 18. An opening 17a penetrating in the thickness direction is formed at the center of the upper end plate 17, and is surrounded by the internal space of the filter element 14 (the inner peripheral surface of the inner tube 15 and the upper and lower end plates 17, 18). In the following description, it is referred to as “inner space 19”.

  The diameter of the opening 17a of the upper end plate 17 is formed to be slightly larger than the outer diameter of the filter mounting portion 8b, and protrudes from the upper and lower surfaces of the upper end plate 17 in close contact with the inner periphery of the opening 17a. Thus, a ring-shaped gasket 20 having a U-shaped cross section is disposed. The gasket 20 is formed so that the inner diameter of the opening 17a (the inner diameter of the gasket 20) when the gasket 20 is mounted is slightly smaller than the outer diameter of the filter mounting section 8b.

  On the lower surface of the lower end plate 18 of the filter element 14, a spring receiving portion 18 a that is recessed upward is formed. When attaching the filter element 14 to the filter 1, a spring 23 is disposed on the bottom surface of the case 3, and the filter element 14 is inserted into the case 3 so that the lower end plate 18 faces downward. At this time, the spring 23 is held between the bottom surface of the filter element 23 and the lower end plate 18. Then, the case 3 and the filter element 14 are attached to the filter head 2 so that the filter attachment portion 18 b of the filter head 2 is inserted from the opening 17 a formed in the upper end plate 17.

  At this time, since the inner diameter of the gasket 20 is formed slightly smaller than the outer diameter of the filter mounting portion 8b as described above, the inner peripheral surface of the gasket 20 and the outer peripheral surface of the filter mounting portion 8b are in close contact with each other. Then, when the female screw portion 5a formed in the case 3 and the male screw portion 7a formed in the filter head 2 are screwed together as described above, the O-ring 13 attached to the upper portion of the case 3 becomes the first seal surface. 2a, the filter element 14 is pushed upward to compress the spring 23, and the upper portion of the gasket 20 disposed on the upper end plate 17 of the filter element 14 is formed in the inner cylindrical portion 8. It contacts the sealing surface 8c.

  Since the diameter of the filter element 14 is slightly smaller than the inner diameter of the case 3, a space outside the filter element 14 in the case 3, that is, the outer periphery surrounded by the inner surface of the case 3 and the outer peripheral surface of the filter element 14. A space 21 is formed. Further, since the gasket 20 is formed so as to protrude from the upper and lower surfaces of the upper end plate 17, when the filter element 14 is attached to the filter 1, the lower surface of the filter head 2 and the upper surface of the upper end plate 17 are A space 22 is formed between them by the gasket 20. Therefore, the outer passage 9 and the outer peripheral space 21 formed in the filter head 2 communicate with each other through the space 22. Further, since the filter mounting portion 8 b of the inner cylindrical portion 8 protrudes into the inner peripheral space 19 of the filter element 14, the inner passage 11 communicates with the inner peripheral space 19 of the filter element 14. At this time, since the gasket 20 is in close contact with the second seal surface 8c and the filter mounting portion 8b, the opening 17a of the upper end plate 17 is sealed with respect to the space 22, and the filter head 2 and the case 3 The space formed by is separated into an inner peripheral space 19 and an outer peripheral space 21 by the filter element 14.

  When fluid such as oil is introduced into the outer peripheral space 21 from the inflow hole 10 of the filter 1 configured as described above, it passes through the filter medium 16 from the outer peripheral surface of the filter element 14 and passes through the small hole 15a of the inner tube 15 to the inner peripheral space. 19 flows into. When the fluid passes through the filter medium 16, solids contained in the fluid are captured and removed, so that the fluid flowing into the inner peripheral space 19 is in a clean state. The clean fluid in the inner peripheral space 19 flows out from the outflow hole 12 to the outside.

  When a certain amount or more of solid matter or the like is captured by the filter medium 16 of the filter element 14, the filter medium 16 is clogged and the filtration ability is lowered. Therefore, it is necessary to replace the filter element 14 with a new one. The procedure for removing the filter element 14 from the filter 1 can be performed by reversing the above-described installation procedure. However, since the fluid remains in the inside, the case 3 is removed from the filter head 2 in this state. And the internal fluid will scatter around. Therefore, first, the plug 28 screwed into the drain member 25 is removed, and an operation of discharging the fluid accumulated inside from the discharge hole 26 is performed.

  At this time, a tray B such as a bucket is placed below the discharge hole 26 to collect the fluid to be discharged. However, depending on the position where the filter 1 is attached, the place where the tray B is placed is limited. The degree of freedom becomes low. Therefore, when discharging the fluid from the filter 1, the operation is performed using the drain cup 40 according to the present invention. Now, the drain cup 40 will be described. As shown in FIG. 3, the drain cup 40 is attached so as to cover the drain member 25 located at the lower portion of the filter 1, and the fluid flowing out from the discharge hole 26 of the drain member 25 is scattered to the surroundings without being scattered. It is collected at the position (bucket etc.) and discharged.

  First, a first embodiment will be described with reference to FIGS. The drain cup 40 has a bowl-shaped (bottom-cylindrical cylindrical) cup body 41 having an opening 46 having an open top and an internal space 48, and a cylindrical shape protruding downward from the bottom surface of the cup body 41. And a connection portion 43 having a first flow path 49 penetrating vertically inside and communicating with the internal space 48, and a second flow path 50 connected to the connection portion 43 and formed inside is a first. The hose 44 communicates with the flow path 49. A work window 42 is formed on the side (cylindrical surface) of the cup body 41 in the drain cup 40 and communicates with the internal space 48 of the cup body 41. A ring-shaped magnet 45 is attached to the upper end of the cup body 41 so as to surround the opening 46. Further, the hose 44 is connected so that the connection portion 43 is inserted into the second flow path 50.

  In the filter 1, the case member 4 is formed of a metal material as described above for pressure resistance and strength against the fluid to be filtered. Therefore, when the drain cup 40 is attached from below the filter 1 so that the drain member 25 is inserted into the opening 46, the magnet 45 is attracted to the case member 4 and the drain cup 40 is fixed to the filter 1. At this time, the drain member 25 of the filter 1 is covered with the cup body 41, and the lower portion of the drain member 25 and the plug 28 are located in the internal space 48. Then, the tool T is inserted into the internal space 48 from the work window 42 and the plug 28 is removed from the drain member 25. When the plug 28 is removed, the fluid staying in the filter 1 flows out from the discharge hole 26 to the internal space 48 of the cup body 41 and flows through the first flow path 49 of the connection portion 43 and the second flow path 50 of the hose 44. Then, it flows out from the lower end opening of the hose 44 and collects in the tray B.

  Note that when the removed plug 28 falls into the internal space 48, a wire mesh is provided below the work window 42 and below the cup body 41 so as to be in contact with the inner peripheral surface of the internal space 48 so that the plug 28 can be easily taken out from the work window 42. 47 is preferably provided. Since the plug 28 that has fallen off the drain member 25 is captured by the wire mesh 47, the plug 28 does not fall down to the connecting portion 43 and the hose 44, and can be easily taken out from the work window 42.

  When the drain cup 40 according to the present invention is configured as described above, a special mounting structure is not required when the drain cup 40 is mounted on the filter 1, and the filter 1 is configured by the metal case 3 (case member 4). In addition, the drain cup 40 can be used for the existing filter 1. Further, since the drain cup 40 is attached to the filter 1 by being attracted to the filter 1 by the magnet 45, the attaching and removing operations are easy. Furthermore, since the fluid discharge path can be freely taken by the hose 44, the position of the receiving tray B or the like that receives the fluid discharged from the filter 1 is less restricted, and the working efficiency is improved. Therefore, there is an effect of preventing the fluid from leaking, leaking and scattering from the filter 1, and discharging the fluid from the filter 1 and the filter element 14 without contaminating the peripheral device to which the filter 1 is attached under any environment. Exchange work can be performed.

  After discharging the fluid in the filter 1 from the discharge hole 26 as described above, the case 3 is rotated and removed from the filter head 2. During the removal of the case 3, the fluid or the like accumulated in the inner circumferential space 19 of the filter element 14 flows out from the discharge hole 26, so that the drain cup 40 is attached to the filter 1 and the case 3 is removed. It is preferable. However, when the case 3 is rotated, the drain cup 40 is also rotated at the same time, so that the hose 44 is twisted, and the lower end portion of the hose 44 may jump out of the tray B, and the fluid may be scattered around. .

  Therefore, as shown in FIG. 4, an engagement protrusion 43 a that protrudes in an annular shape is formed on the outer periphery of the connection portion 43, while the engagement protrusion 43 a is formed at the upper end of the hose 44 attached to the connection portion 43. Corresponding to this, an engaging recess 44a that is annularly recessed outward from the inner peripheral surface is formed, and the engaging protrusion 51a is engaged with the engaging recess 44a to constitute the engaging portion 51. With such a configuration, the connecting portion 43 and the hose 44 are loosely coupled at the engaging portion 51 and can rotate relative to each other with respect to the cylindrical axis direction. Therefore, even if the case 3 and the cup body 41 rotate in the cylindrical axis direction, the hose 44 does not rotate coaxially and does not twist, so the lower end portion of the hose 44 is always located in the tray B, and thus stable. The discharged fluid can be collected.

  In addition, in order to use the extension hose 50 when there is a distance between the filter 1 and the installation location of the tray B, an extension connection portion 44b is formed at the lower end portion of the hose 44 as shown in FIG. It is possible to connect the extension hose 50 to the extension connection portion 44b. If it is set as such a structure, the restriction | limiting of the installation place of the receiving tray B will further decrease, and work efficiency can be improved.

  In the first embodiment described above, the work window 42 is provided in the cup body 41, and the tool T is inserted through the work window 42 to remove the plug 28. Fluid may splash. Therefore, as a second embodiment, a case where a drain cup 40 'incorporating a mechanism for removing the plug 28 is used to prevent the fluid from scattering outside will be described with reference to FIGS. In addition, about the structure similar to 1st Example, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the second embodiment, the cup body 41 includes an upper cup 41a and a lower cup 42a. On the lower outer peripheral surface of the upper cup 41a, an upper engaging convex portion 62a protruding in an annular shape is formed, while on the upper outer peripheral surface of the lower cup 41b, a lower engaging convex portion 63a protruding in an annular shape is formed. Is formed. And the plug removal part 60 is attached so that this upper cup 41a and the lower cup 41b may be connected.

  The plug detaching portion 60 has a cylindrical coupling portion 61 having an inner diameter slightly larger than the diameter of the cup body 41 (41a, 41b) and a central direction from the inner peripheral surface of the substantially axial central portion of the coupling portion 61 in the central direction. The four hubs 64 extending and a plug fitting portion 65 connected to the hub 64 and positioned at the center of the coupling portion 61 are configured. The plug fitting portion 65 is formed with a plug fitting hole 66 that has substantially the same shape as the plug 28 and penetrates the plug 28 in the vertical direction. Further, the upper and lower engaging recesses 62b and 63b that engage with the above-described upper and lower engaging protrusions 62a and 63a, respectively, are annularly recessed in the inner peripheral surfaces of the upper and lower cylindrical axial directions of the coupling portion 61. Is formed. Further, two handles 67 extending outward from the outer peripheral surface of the coupling portion 61 are formed.

  The plug removing portion 60 is coupled so that the inner circumferential surface of the coupling portion 61 is located close to the outer circumferential surfaces of the upper cup 41a and the lower cup 41b and is sandwiched between the upper and lower cups 41a and 41b from above and below. At this time, the upper cup 41a and the plug removal portion 60 are loosely coupled by the upper engagement portion 62 engaged with the upper engagement convex portion 62a and the upper engagement concave portion 62b, and the lower cup 41b and the plug removal portion 60 are The lower engaging portion 63 is engaged with the engaging convex portion 63a and the lower engaging concave portion 63b, and the upper cup 41a, the plug removing portion 60, and the lower cup 41b are relatively rotatable around a cylindrical axis. is there.

  When the drain cup 40 ′ thus configured is attached to the filter 1, the magnet 45 is attracted to the case 3 and the plug fitting hole 66 of the plug removing portion 60 is fitted to the plug 28 in the internal space 48. When the plug removing portion 60 is rotated by the handle 67, the plug removing portion 60 rotates relative to the upper and lower cups 41a and 41b, so that the plug fitting portion 65 also rotates and the plug 28 is removed from the discharge hole 26. It is. At this time, the removed plug 28 passes through the plug fitting hole 66 and falls downward in the internal space 48 and is captured by the wire mesh 47.

  According to the above configuration, the fluid can be discharged from the filter 1 by removing the plug 28 while the drain cup 40 ′ is attached to the filter 1. In the second embodiment, when the drain cup 40 'is attached to the filter 1, the drain hole 26 is completely covered with the drain cup 40', so that no fluid is scattered around.

  In the first embodiment, in order to prevent the hose 44 from being twisted when the case 3 is removed from the filter 1, the connecting portion 43 and the hose 44 are loosely coupled by the engaging portion 51 so as to be relatively rotatable. In the case of the second embodiment, the upper cup 41a and the plug removing portion 60 can be rotated relative to each other and the same effect can be obtained. Therefore, the hose 44 can be provided without providing the engaging portion 51 in the first embodiment. Can't twist.

  Further, the drain cup 40 according to the present invention is not limited to the filter 1 described with reference to FIG. 2, and may be used as long as the drain hole 26 (drain member 25) is formed at the bottom. Needless to say, you can.

It is a perspective view which shows the drain cup which concerns on 1st Example of this invention. It is sectional drawing which shows the filter in which the drain cup which concerns on this invention is used. It is sectional drawing which shows the state which attached the drain cup which concerns on 1st Example to the filter. It is sectional drawing which shows the drain cup which concerns on 1st Example which comprised the hose so that relative rotation with respect to the cup main body was possible. It is sectional drawing which shows the drain cup which concerns on 2nd Example of this invention. It is a top view which shows a plug removal part.

Explanation of symbols

1 Filter 3 Case (housing)
26 Discharge hole 28 Plug 41 Cup body 42 Work window 44 Hose 45 Magnet (coupling member)
46 Opening 47 Wire mesh 48 Internal space 49 Engaging portion 50 Second flow path (flow path)
52 Extension length hose 60 Plug removal part T Tool

Claims (7)

A bottomed cylindrical cup body having an opening with an upper portion and an internal space formed;
A hose which is attached to extend downward from the bottom surface of the cup body and in which a flow path communicating with the internal space is formed.
A coupling member attached to the opening,
The discharge hole is inserted into the opening from below the filter having a bottomed cylindrical housing, and the discharge hole for discharging the internal fluid is formed in the housing, and is attached to the housing by the coupling member The drain cup is configured to receive the fluid discharged from the discharge hole by the cup body and to flow out from the flow path of the hose. The drain cup according to claim 1, wherein the housing is made of a metal material, and the coupling member is made of a magnet. The filter is configured to have a plug that closes the discharge hole,
A work window for inserting a tool for removing the plug into the internal space when the plug is removed from the discharge hole while being attached to the filter is formed on a side portion of the cup body. The drain cup according to claim 1 or 2. The filter is configured to have a plug that closes the discharge hole,
A plug removing portion that is attached to the cup body so as to be relatively rotatable in the axial direction and fits in the internal space with the plug;
The plug removing part is fitted to the plug when attached to the filter, and the plug removing part is configured to be removed by rotating the plug removing part in an axial direction. The drain cup according to 1 or 2. 5. The drain cup according to claim 3, further comprising: a wire net that captures when the plug is removed and dropped in the internal space below the cup body. 6. The cup main body and the hose have an engaging portion attached loosely, and the cup main body and the hose are configured to be relatively rotatable in the axial direction at the engaging portion. The drain cup according to any one of claims 1 to 5. The drain cup according to claim 1, wherein an extension hose is connectable to a lower end portion of the hose.

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