Drain trap

Abstract

To provide a drain trap that can be installed in a drain passage arranged along a lateral direction including a horizontal direction, aiming the simplification of the cleaning work.SOLUTION: A drain trap consists of: a cylindrical main body 5 comprising a flow-in part 3 to let drain water A flow in and a discharge part 4 to discharge the drain water A; and a retention body 6 that is arranged inside the main body 5 communicating with the flow-in part 3 and the discharge part 4 leaving a space 100 between itself and the main body 5 and retains the drain water A that has flown in through the flow-in part 3. The flow-in part 3 and the discharge part 4 are arranged on the side wall part of the main body 5. The retention body 6 is detachably fitted on the main body 5. The main body 5 is arranged in a drain passage with the flow-in part 3 and the discharge part 4 connected to the discharge passage. The flow-in part 3 and the discharge part 4 are formed in a pipe shape to let the drain water A flow through.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a drain trap that prevents the backflow of polluted air, odors, etc. [Background technology]

[0002] As the above-mentioned drain trap, there is known a trap that is arranged in a drainage path through which drainage water such as that from an air conditioner flows, and that prevents the backflow of contaminated air, odors, etc. in the drainage path (see, for example, Patent Document 1).

[0003] The drain trap of Patent Document 1 is provided with a main body having an inlet into which wastewater flows and an outlet from which wastewater is discharged, the inlet and outlet being arranged on a side wall, and the inlet and outlet being connected to a drainage path. The main body is formed in a cylindrical shape with a bottom, and wastewater flowing in from the inlet is stored inside the main body. The main body is provided with a normally closed valve member that opens when a set amount or more of wastewater is stored inside the main body, allowing the wastewater to flow out to the outlet.

[0004] Another example of a drain trap is one that is installed in the drain outlet of a sink tank (see, for example, Patent Document 2). The drain trap of Patent Document 2 is provided with a cylindrical main body with a bottom that is open at the top, the open upper part of the main body being an inlet part, and a discharge part being arranged at the bottom of the main body. A cylindrical storage body with a bottom that stores wastewater flowing in from the inlet part is provided inside the main body. A communication pipe that communicates with the discharge part of the main body is arranged at the bottom of the storage body, and the communication pipe is provided with a normally closed valve member that opens when more than a set amount of wastewater is stored in the storage body, allowing the wastewater to flow out to the discharge part. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5810035 [Patent Document 2] Japanese Utility Model Application Publication No. 53-029549 Summary of the Invention [Problem to be solved by the invention]

[0006] In Patent Document 1, wastewater is stored inside the main body, so wastewater contaminants such as dust and foreign matter accumulate inside the main body, requiring periodic cleaning of the inside of the main body. However, because the main body is disposed in the drainage path, it cannot be removed from the drainage path, and the inside of the main body must be cleaned while it is disposed in the drainage path, making cleaning difficult. For example, if the drainage path is disposed above the ceiling, it is difficult to secure enough space for cleaning, making cleaning a very time-consuming task.

[0007] In this regard, in Patent Document 2, if the reservoir disposed inside the main body can be removed from the main body, cleaning work can be easily performed. However, in Patent Document 2, a communication pipe is disposed at the bottom of the reservoir, so the reservoir must be removed so that wastewater does not leak from the communication pipe. This makes it difficult to remove the reservoir from the main body, which ultimately leads to a complicated cleaning work.

[0008] Furthermore, in the drain trap of Patent Document 2, the inlet portion is arranged on the upper side of the main body and the outlet portion is arranged on the lower side of the main body, so it is not suitable as a drain trap to be arranged in a drainage path that is usually arranged along a lateral direction such as horizontally.

[0009] In view of this situation, the main object of the present invention is to provide a drain trap that can be used as a drain trap to be placed in a drainage path that is arranged along a horizontal direction, such as a lateral direction, and that can simplify cleaning work. [Means for solving the problem]

[0010] A first characteristic configuration of the present invention is a tubular body having an inlet portion into which wastewater flows and an outlet portion from which the wastewater is discharged; A reservoir is provided inside the main body in a state of communication with the inlet and the outlet and forming a space between the main body and the reservoir, and the reservoir stores wastewater flowing in from the inlet, the inlet and outlet are disposed on a side wall of the main body; The reservoir is provided so as to be freely attachable to and detachable from the main body.

[0011] According to this configuration, the main body can be disposed in a drainage path with the inlet and outlet portions disposed on the side wall of the main body connected to the drainage path, making it possible to use it as a drain trap disposed in a drainage path disposed in a lateral direction, such as a horizontal direction. The reservoir body can be attached and detached from the main body, allowing cleaning of the reservoir body to be performed at a location other than the drainage path, simplifying cleaning work. Moreover, since the reservoir body can be detached from the main body for not only cleaning but also other maintenance work, workability is improved. After cleaning work, etc., is completed, the reservoir body can be attached to the main body to configure the drain trap to perform its original function.

[0012] A second characteristic feature of the present invention is that the reservoir is attached to the main body in a watertight state via a packing.

[0013] According to this configuration, the reservoir can be attached to the main body in a watertight state, which prevents wastewater from entering the space formed between the reservoir and the main body. This makes it possible to appropriately prevent wastewater from entering the space formed between the reservoir and the main body and causing wastewater stains on the main body.

[0014] A third characteristic configuration of the present invention is that the main body is provided with an opening that opens to the outside, a cover body that can be switched between a closed state that closes the opening and an open state that opens the opening, The reservoir is provided so as to be freely attached to and detached from the main body through the opening.

[0015] According to this configuration, the opening can be opened by switching the lid to the open state, so that the reservoir can be easily attached to the inside of the main body by passing through the opening, and the reservoir can be easily removed from the inside of the main body by passing through the opening, thereby simplifying the work of attaching and removing the reservoir.

[0016] A fourth characteristic configuration of the present invention is that the main body is provided with a normally closed valve member and a water seal forming body, The water seal forming body is attached to the main body in a state where it is supported by the reservoir attached to the main body, and is provided so as to be detachable from the main body, The valve member is attached to the main body in a state where it is supported by the water seal formation body attached to the main body, and is provided so as to be removable from the main body.

[0017] According to this configuration, by providing a normally closed valve member, the valve opens and allows the wastewater to flow out to the discharge section only when a set amount or more of wastewater is stored, so that the outflow of wastewater is permitted while the valve member normally prevents the backflow of contaminated air, odors, etc. In addition to the normally closed valve member, a water seal forming body is provided, so that the wastewater stored in the storage body can form a water seal, thereby appropriately preventing the backflow of contaminated air, odors, etc.

[0018] The water seal formation body can be freely attached to the main body while being supported by the reservoir body attached to the main body, and can therefore be attached to the main body while using the reservoir body attached to the main body first as a support body. The valve member can be freely attached to the main body while being supported by the water seal formation body attached to the main body, and can therefore be attached to the main body while using the water seal formation body attached to the main body first as a support body. In this way, the reservoir body, water seal formation body, and valve member can be attached to the main body in this order, and each component can be attached while using the component attached first as a support body. Therefore, there is no need to provide a separate support body or the like to support each component, and each component can be attached appropriately while simplifying the attachment configuration.

[0019] Furthermore, in addition to the storage body, the valve member and water seal forming body can also be freely removed from the main body, so that each component can be removed from the main body and cleaning work can be performed at a location other than the location where the drainage path is located, thereby simplifying the cleaning work.

[0020] A fifth characteristic feature of the present invention is that the main body is provided with a communication part that connects the space between the reservoir and the main body to the outside of the main body.

[0021] For example, if the space between the reservoir and the main body is a sealed space, changes in the internal pressure of the main body may cause the main body and the reservoir to adhere to each other, making it difficult to remove the reservoir from the main body. Therefore, according to this configuration, by providing a communication part that connects the space between the reservoir and the main body to the outside of the main body, the space between the reservoir and the main body is not a sealed space. Therefore, even if changes in the internal pressure of the main body occur, air can be discharged to the outside of the main body through the communication part, preventing problems such as the main body and the reservoir adhering to each other, and making it easy to remove the reservoir from the main body.

[0022] When attaching the reservoir to the main body, if the space between the reservoir and the main body is an enclosed space, the reservoir must be attached to the main body while compressing the air in that space, making it difficult to attach the reservoir to the main body. Therefore, by providing a communication part that connects the space between the reservoir and the main body to the outside of the main body and not making the space between the reservoir and the main body an enclosed space, it is possible to easily attach the reservoir to the main body.

[0023] A sixth characteristic feature of the present invention is that the communication portion is provided with a filter that allows air to pass through but prevents water from passing through.

[0024] If wastewater enters the space formed between the reservoir and the main body for some reason, the wastewater may flow out of the main body through the communication part, causing wastewater contamination, etc. on the outside of the main body. Therefore, according to this configuration, the communication part is provided with a filter that allows air to pass through but prevents water from passing through. This makes it possible to prevent the wastewater from flowing out of the main body through the communication part, even if wastewater enters the space formed between the reservoir and the main body, and effectively prevents wastewater contamination, etc. from occurring on the outside of the main body.

[0025] A seventh characteristic configuration of the present invention is a liquid ejection device, wherein the communication portion is disposed in a side wall portion of the main body, The lower end of the communication portion is disposed at the same height as the inner bottom of the main body or lower than the inner bottom of the main body in the vertical direction.

[0026] As described in the sixth characteristic configuration, even if wastewater enters the space formed between the reservoir and the main body for some reason, the filter can prevent the wastewater from flowing out of the main body through the communication part. However, in this case, there is a possibility that the wastewater will accumulate at the bottom inside the main body, so cleaning work such as removing the wastewater is required.

[0027] Therefore, according to the present configuration, the communication part is disposed on the side wall of the main body, and the lower end of the communication part is disposed at the same height as the inner bottom of the main body or lower than the inner bottom of the main body in the vertical direction. As a result, wastewater accumulated at the inner bottom of the main body can be easily moved to the lower end of the communication part, which is at the same height as the inner bottom of the main body or lower than the inner bottom of the main body. For example, by removing the filter provided in the communication part, the wastewater accumulated at the inner bottom of the main body can be easily discharged to the outside of the main body through the communication part, facilitating cleaning work such as removing the wastewater. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a perspective view of a drain trap disposed in a drain path; [Figure 2] Cross-sectional view of the drain trap as seen from a direction perpendicular to the opposing direction of the inlet and outlet portions. [Figure 3] An exploded perspective view of the drain trap with each component disassembled. [Figure 4] Cross-sectional view of the drain trap as seen from the opposite direction of the inlet and outlet [Figure 5] 10 is a cross-sectional view of the drain trap seen from the opposing direction of the inlet and outlet in the second embodiment; [Figure 6] 10 is a cross-sectional view of the drain trap seen from a direction perpendicular to the opposing direction of the inlet portion and the outlet portion in the third embodiment; [Figure 7] FIG. 10 is a perspective view of a drain trap according to a fourth embodiment; [Figure 8] 10 is a cross-sectional view of the drain trap of the fourth embodiment as seen from a direction perpendicular to the opposing direction of the inlet portion and the outlet portion. DETAILED DESCRIPTION OF THE INVENTION

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a drain trap according to the present invention will be described with reference to the drawings. [First embodiment] As shown in Figure 1, this drain trap 1 is arranged in a drainage path 2 through which drainage water such as that from an air conditioner drain flows, and is intended to prevent the backflow of contaminated air, odors, etc. in the drainage path 2.

[0030] (Main body) As shown in Figures 1 and 2, the drain trap 1 is provided with a main body 5 having an inlet section 3 into which waste water A flows and a discharge section 4 from which the waste water A is discharged. The main body 5 is formed in a cylindrical shape with a bottom, and as shown in Figure 3, the upper side thereof is an opening section 51 that is open. As shown in Figure 2, the inlet section 3 and the discharge section 4 are formed in a tubular shape that allows the waste water A to flow, and are provided in a position extending horizontally on a side wall section 52 of the main body 5. The inlet section 3 and the discharge section 4 are disposed in positions where they face each other.

[0031] As shown in Figure 2, the main body 5 has an upper end portion 53 which is the portion with the largest diameter in the vertical direction, and a main body thread portion 54 is formed on the outer wall of the upper end portion 53. The inlet portion 3 and the outlet portion 4 are disposed below the upper end portion 53. Below the locations where the inlet portion 3 and the outlet portion 4 are disposed is a first reduced diameter portion 55 which is smaller in diameter than the upper end portion 53, and below the first reduced diameter portion 55 is a second reduced diameter portion 56 which is smaller in diameter than the first reduced diameter portion 55.

[0032] 2 and 3, the main body 5 is provided with a storage body 6 that stores wastewater A flowing in from the inlet portion 3, a normally closed valve member 7, a water seal forming body 8 that forms a water seal portion 81 with the wastewater A stored in the storage body 6, and a lid body 9 that closes the opening 51 on the upper side of the main body 5. The storage body 6, the valve member 7, and the water seal forming body 8 are each provided so as to be freely attached to and detached from the main body 5. The lid body 9 is configured to be freely switchable between a closed state in which it closes the opening 51 of the main body 5, and an open state in which it opens the opening 51 of the main body 5.

[0033] (reservoir) 2 and 3, similar to the main body 5, the storage body 6 is formed in a cylindrical shape with a bottom, and as shown in Fig. 2, is disposed inside the main body 5, forming a space 100 between the inner wall 11 and the inner bottom 12 of the main body 5 in a state of communication with the inlet portion 3 and the outlet portion 4. The storage body 6 is provided with a cylindrical storage area 61 with a bottom that bulges downward to store the wastewater A, and a connection area 62 that extends outward around the entire circumferential direction at the upper end of the storage area 61.

[0034] The outer diameter of connection portion 62 of reservoir 6 is smaller than the inner diameter of upper end portion 53 of main body 5, and is formed to be equal to or slightly smaller than the inner diameter of first reduced diameter portion 55 of main body 5. This allows reservoir 6 to be freely moved from the outside to the inside of main body 5 through opening 51 on the upper side of main body 5, and from the inside to the outside of main body 5.

[0035] As shown in Figure 2, the mounting position of the reservoir 6 relative to the main body 5 is a position where the convex main body side fitting portion 57 formed in the first reduced diameter portion 55 of the main body 5 and the concave reservoir side fitting portion 63 formed in the connection portion 62 of the reservoir 6 are fitted and connected.

[0036] 2, an annular first packing P1 (for example, an O-ring or a packing of another shape is applicable) is disposed above the point where the main body-side fitting portion 57 and the reservoir-side fitting portion 63 are fitted and connected. The reservoir 6 is attached to the main body 5 in a watertight state via the first packing P1. This prevents wastewater A and the like from entering the space 100 formed between the reservoir 6 and the inner wall portion 11 and inner bottom portion 12 of the main body 5, causing the wastewater A and the like to stagnate at the inner bottom portion 12 of the main body 5, and prevents dirt from adhering to the inner wall portion 11 and inner bottom portion 12 of the main body 5.

[0037] As shown in Fig. 3, a plurality of reservoir-side fittings 63 formed at the connection site 62 of the reservoir 6 are arranged at intervals in the circumferential direction. In contrast, although not shown, a plurality of body-side fittings 57 of the main body 5 are also arranged at intervals in the circumferential direction. As a result, a plurality of locations at which the body-side fittings 57 and the reservoir-side fittings 63 are fitted and connected are provided at intervals in the circumferential direction. Therefore, by performing a rotation operation that rotates the reservoir 6 in the circumferential direction relative to the main body 5, the body-side fittings 57 and the reservoir-side fittings 63 are positioned to coincide in the circumferential direction, and the body-side fittings 57 and the reservoir-side fittings 63 are fitted and connected.

[0038] 3, a plurality of reservoir-side fitting portions 63 are arranged at intervals in the circumferential direction, and therefore the spaces between the reservoir-side fitting portions 63 in the circumferential direction become fitting-portion-absent portions 64. Therefore, in the up-and-down movement permitted position where the fitting-portion-absent portions 64 and the main body-side fitting portion 57 are aligned in the circumferential direction, the reservoir-side fitting portion 63 and the main body-side fitting portion 57 do not interfere with each other, and the reservoir 6 can be moved downward relative to the main body 5, or the reservoir 6 can be moved upward relative to the main body 5.

[0039] When attaching the reservoir 6 to the mounting position of the main body 5, the reservoir 6 is moved from the upper opening 51 of the main body 5 to the inside of the main body 5, and the reservoir 6 is adjusted to a vertical movement permitted position where the non-fitting portion 64 and the main body side fitting portion 57 are aligned in the circumferential direction. In this state, the reservoir 6 is moved downward, for example, until it abuts the main body 5. Thereafter, by performing a rotation operation to rotate the reservoir 6 in the circumferential direction relative to the main body 5, the main body side fitting portion 57 and the reservoir side fitting portion 63 are fitted and connected, as shown in FIG. 2, and the reservoir 6 can be attached to the mounting position of the main body 5.

[0040] When removing the reservoir 6 from the main body 5, the reservoir 6 is rotated in the opposite circumferential direction relative to the main body 5, in the opposite direction to the attachment, to rotate the reservoir 6 to a vertical movement permitted position where the non-fitting portion 64 circumferentially matches the main body side fitting portion 57. Thereafter, the reservoir 6 is moved upward and moved to the outside of the main body 5 through the upper opening 51 of the main body 5, whereby the reservoir 6 can be removed.

[0041] As shown in FIG. 3 , an upper protrusion 65 that protrudes upward is disposed on the upper surface of the connection portion 62 of the reservoir 6. The upper protrusions 65 are disposed at intervals in the circumferential direction, and a notch 66 is formed between the upper protrusions 65. The notch 66 and the non-fitting portion 64 are disposed at positions that coincide with each other in the circumferential direction. This allows an operator, etc., to easily and appropriately adjust the position of the reservoir 6 to the vertical movement permitted position using the position of the notch 66 as a marker. Furthermore, when rotating and counter-rotating the reservoir 6, the operator, etc., can grasp the upper protrusion 65, and the upper protrusion 65 can also be used as an operating part.

[0042] (water sealing body) As shown in FIG. 3, the water seal forming body 8 is provided with a curved, L-shaped water sealing flow path portion 82 and a flow path support portion 83 that supports the water sealing flow path portion 82 while penetrating it. The flow path support portion 83 is formed in a disk shape with a larger diameter than the connection portion 62 of the storage body 6. The side of the flow path support portion 83 through which the water sealing flow path portion 82 penetrates is the side on which the inlet portion 3 is located. As shown in FIG. 2, the water sealing flow path portion 82 is disposed such that its upstream end portion 82a is fitted and connected to the inlet portion 3 of the main body 5, and its downstream end portion 82b is located inside the storage body 6 (storage portion 61) (the portion where wastewater A is stored). This forms a flow path that turns up and down within the storage body 6 (storage portion 61), forming the water sealing portion 81 that is sealed by the wastewater A stored in the storage body 6. An upstream end 82a of the water sealing flow path portion 82 is fitted and connected to the inlet portion 3 in a watertight manner via an annular second packing P2 (for example, an O-ring or a packing of another shape can be applied).

[0043] 2 and 3, the flow path support portion 83 is provided with a water-sealing side opening 84 that penetrates in the vertical direction on the side opposite to the portion through which the water-sealing flow path portion 82 penetrates (the side where the discharge portion 4 is located). Through this water-sealing side opening 84, the interior of the storage body 6 (storage portion 61) is connected to the upper portion of the water-sealing body 8. The water-sealing side opening 84 is formed in a protruding shape with its opening edge portion 84a protruding upward.

[0044] When attaching the water seal forming body 8 to the main body 5, the reservoir 6 is first attached to the main body 5, and then the water seal forming body 8 is attached to the main body 5. The upstream end 82a of the water seal flow path portion 82 is fitted and connected to the inlet portion 3, and the radially outer portion of the flow path support portion 83 is placed and supported on the connection portion 62 of the reservoir 6, thereby supporting the water seal forming body 8 on the reservoir 6. By placing and supporting the radially outer portion of the flow path support portion 83 on the connection portion 62 of the reservoir 6 over the entire circumferential direction, the water seal forming body 8 can be attached in a stable position.

[0045] (Valve member) As shown in Figure 3, the valve member 7 includes a ball-shaped float valve 71 and a valve seat 72 that supports the float valve 71. The valve seat 72 is circular in plan view and is configured as a concave body with its radially outer end extending downward over its entire circumferential length. A valve storage space 73 that bulges downward and stores the float valve 71 is provided on the side of the valve seat 72 where the discharge section 4 is located. As shown in Figures 2 and 3, a discharge section-side communicating section 74 that communicates with the discharge section 4 is formed on the side wall of the valve storage space 73, and a thin plate-like separator 75 that divides the discharge section-side communicating section 74 in the left-right direction is provided.

[0046] A valve member-side opening 76 is provided at the bottom of the valve storage space 73. The valve member-side opening 76 is formed in a protruding shape with its opening edge 76a protruding downward. The float valve 71 is formed with a larger diameter than the valve member-side opening 76. Typically, the float valve 71 is configured as a normally closed type that blocks the valve member-side opening 76 to prevent backflow of wastewater and odors from the discharge section 4. When the amount of wastewater A stored in the storage body 6 (storage portion 61) exceeds a set amount (for example, when the water surface of the wastewater A reaches above the valve member-side opening 76), the float valve 71 floats up from the valve member-side opening 76 and opens the valve member-side opening 76. As a result, the wastewater A flowing out from the valve member-side opening 76 flows from the valve storage space 73 through the discharge section-side communicating portion 74 to the discharge section 4, as shown by the outline arrow in FIG. 2.

[0047] When attaching the valve element 7 to the main body 5, the reservoir 6 and the water seal formation body 8 are attached to the main body 5 in this order first, and then the valve element 7 is attached to the main body 5. As shown in Figure 2, the valve element side opening 76 formed at the bottom of the valve storage space 73 and projecting downward is fitted from above into a water seal side opening 84 formed at a flow path support portion 83 in the water seal formation body 8, thereby supporting the valve element 7 on the water seal formation body 8. Since the opening edge 84a extending upward at the water seal side opening 84 abuts against the bottom wall of the valve storage space 73, the valve storage space 73 is supported by the opening edge 84a, and the valve element side opening 76 can be properly maintained in a state where it is fitted into the water seal side opening 84.

[0048] (lid) The lid 9 is formed in a circular shape in a plan view, and is configured as a concave body with its radially outer end portion extending downward over its entire circumferential length. A lid-side thread portion 91 is formed on the inner side of the downwardly extending portion of the lid 9.

[0049] When attaching the lid body 9 to the main body 5, the storage body 6, the water seal forming body 8, and the valve member 7 are attached in this order first, and then the lid body 9 is attached to the main body 5 last. By rotating the lid body 9 relative to the main body 5, as shown in Figure 2, the main body side threaded portion 54 and the lid side threaded portion 91 are screwed together to attach the lid body 9 to the main body 5, and the lid body 9 is switched to a closed state in which the upper opening 51 of the main body 5 is closed by the lid body 9.

[0050] An annular third packing P3 (for example, an O-ring or a packing of another shape can be used) is disposed above the portion where the body-side threaded portion 54 and the lid-side threaded portion 91 are threaded together. The lid 9 is attached to the body 5 via the third packing P3, making the inside of the body 5 watertight.

[0051] In this manner, by attaching the reservoir 6, water seal formation body 8, valve member 7, and cover 9 to the main body 5 in this order, wastewater A can be stored in the reservoir 6, and the water seal formation body 8 can form a water seal portion 81 in the reservoir 6, as shown in FIG. 2, thereby forming a drain trap 1 having a normally closed valve member 7. For example, the entire main body 5, the entire reservoir 6, the entire water seal formation body 8, the entire valve seat portion 72 of the valve member 7, and the entire cover 9 can be made transparent, and the float valve 71 of the valve member 7 can be made colored. This allows the degree of dirt inside the reservoir 6 and the condition of each component to be visually confirmed from the outside of the main body 5, and by making the float valve 71 colored, the condition of the float valve 71 can be easily confirmed. Here, "transparent" means that the interior of the main body 5 can be seen from the outside, and is not limited to colorless transparency, but can also be colored transparency or translucent. Regarding the color of each member, it is possible to appropriately change which parts are transparent and which parts are colored, and they may be transparent, colored, or opaque.

[0052] (Communication part) As shown in Fig. 4, when the reservoir 6 is attached to the attachment position of the main body 5, a space 100 is formed between the reservoir 6 and the main body 5, and a communication part 101 is provided that connects the space 100 to the outside of the main body 5. The communication part 101 is configured, for example, by a communication hole part formed in the side wall part 52 of the main body 5, as shown in Figs.

[0053] The communication part 101 is provided with, for example, a filter F that allows the passage of air but prevents the passage of water. As a result, the space 100 between the reservoir 6 and the main body 5 is not an airtight space but is a space that communicates with the outside of the main body 5, and the filter F prevents liquid such as wastewater A from flowing out of the main body 5 from the space 100.

[0054] The location of the communicating part 101 is, for example, as shown in Fig. 1, a position perpendicular to the opposing direction of the inlet part 3 and the outlet part 4, and as shown in Fig. 4, the communicating part 101 is disposed above the second reduced diameter part 56 of the main body 5. The location of the communicating part 101 is not limited to this location and can be changed as appropriate. Incidentally, the communicating part 101 may also be provided without the filter F.

[0055] Second Embodiment The second embodiment is an alternative embodiment of the communication part 101 in the first embodiment, and therefore will be described mainly with reference to Fig. 5, focusing on the communication part 101. Other configurations are the same as those in the first embodiment, and therefore the same reference numerals will be used and descriptions thereof will be omitted.

[0056] In the first embodiment, as shown in FIG. 4, an example was shown in which the communication portion 101 was configured as a communication hole portion formed in the side wall portion 52 of the main body 5. In contrast to this, in the second embodiment, in addition to the communication hole portion 101a formed in the side wall portion 52 of the main body 5, the communication portion 101 is provided with a communication connection portion 102 that is communication-connected to the communication hole portion 101a. The communication connection portion 102 is formed in an L-shaped tube that extends horizontally and then bends downward and extends upward, and its upper end portion extends above the upper end of the reservoir 6 (a position corresponding to the upper limit water level of the reservoir 6). As a result, the communication hole portion 101a and the communication connection portion 102 allow the space 100 between the reservoir 6 and the main body 5 to communicate with the outside of the main body 5 at a portion above the upper limit water level of the reservoir 6.

[0057] Third Embodiment The third embodiment is an alternative embodiment of the valve member 7 and the water seal forming body 8 in the first embodiment, and therefore will be described mainly with reference to Fig. 6, focusing on the valve member 7 and the water seal forming body 8. Other configurations are the same as those in the first embodiment, and therefore the same reference numerals will be used and descriptions thereof will be omitted.

[0058] As shown in Fig. 6, the water seal forming body 8 and the valve member 7 are provided integrally. The water seal forming body 8 is provided with a curved, L-shaped water sealing flow path portion 85. The valve member 7 is provided with a communication connection flow path 77 in which a connection flow path communicating with the water sealing flow path portion 85 is formed, and a valve 78 for opening and closing the communication connection flow path 77.

[0059] The valve 78 is configured as a normally closed type that is normally in a closed state to close the communicating connection flow path 77, and when a set amount or more of wastewater A is stored in the storage body 6, it is in an open state to open the communicating connection flow path 77. As the valve 78, various types of valves can be used, such as an umbrella valve that changes from a closed state to an open state when a predetermined pressure is applied to the valve.

[0060] The water seal forming body 8 and the valve member 7 are integrated by communicating and connecting the water sealing flow path portion 85 of the water seal forming body 8 with the communicating connection flow path 77 of the valve member 7. The integrated body of the water seal forming body 8 and the valve member 7 is arranged such that the upstream end 85a of the water sealing flow path portion 85 is located inside the reservoir 6 (storage area 61) (the area where wastewater A is stored) and the downstream end 77a of the communicating connection flow path 77 is fitted and connected to the discharge part 4 of the main body 5. This forms a flow path that turns back in the vertical direction within the reservoir 6 (storage area 61), forming the water seal part 81 that is sealed with the wastewater A stored in the reservoir 6. The downstream end 77a of the communicating connection flow path 77 is fitted and connected to the discharge part 4 in a watertight manner via an annular fourth packing P4 (for example, an O-ring or a packing of another shape can be used).

[0061] When attaching the reservoir 6, water seal forming body 8, and valve member 7 to the main body 5, the reservoir 6 is attached in the same manner as in the first embodiment, but unlike in the first embodiment, the water seal forming body 8 and valve member 7 are attached as a single unit.

[0062] In the third embodiment, the main body 5 and the lid 9 are partially modified from those in the first embodiment. As shown in FIG. 6 , a main body packing mounting portion 58 for mounting an annular fifth packing P5 (for example, an O-ring or a packing of another shape can be applied) is provided inward of the outer wall portion of the upper end portion 53 of the main body 5. The lid 9 also has a lid packing mounting portion 92 corresponding to the main body packing mounting portion 58. The main body packing mounting portion 58 is formed in a convex shape that protrudes upward, and the lid packing mounting portion 92 is formed in a concave shape that recedes upward. The lid 9 is attached to the main body 5 via the fifth packing P5, making the interior of the main body 5 watertight. This allows the main body packing mounting portion 58 to be sandwiched between the lid packing mounting portion 92 and the fifth packing P5.

[0063] [Fourth embodiment] The fourth embodiment is an alternative embodiment of the communication part 101 and the filter F in the first embodiment, and will be described mainly with reference to Figures 7 and 8. The other configurations are the same as those in the first embodiment, so the same reference numerals are used and the description thereof will be omitted.

[0064] 8, the communication part 103 is disposed at the lower end portion of the side wall part 52 of the main body 5, and is configured as a cylindrical part extending horizontally from the side wall part 52 of the main body 5. A filter F1 that allows the passage of air but prevents the passage of water is disposed at the outer end of the communication part 103.

[0065] 8, a nut 104, a seat 105, and a sixth packing P6 (for example, an O-ring or a packing of another shape can be used) are provided to install the filter F1 at the outer end of the communication part 103. A communication part-side threaded part 106 is formed on the outer periphery of the communication part 103, which is a cylindrical part, and a nut-side threaded part 107 is formed on the inner periphery of the cylindrical nut 104, and the communication part-side threaded part 106 and the nut-side threaded part 107 are provided so as to be freely threadably engageable with each other.

[0066] 8, base 105 includes cylindrical portion 105a that is fitted into communicating portion 103, and disk-shaped portion 105b that has a larger diameter than cylindrical portion 105a. Disk-shaped portion 105b has a plurality of through-holes that communicate with the inside of cylindrical portion 105a and the outside of disk-shaped portion 105b through the plurality of through-holes.

[0067] To attach the filter F1, as shown in FIG. 8, the sixth packing P6 is positioned between the disk-shaped portion 105b of the base 105 and the outer end of the communicating portion 103, and the cylindrical portion 105a of the base 105 is fitted into the communicating portion 103. With the filter F1 positioned between the disk-shaped portion 105b of the base 105 and the nut 104, the nut 104 is rotated relative to the communicating portion 103 to thread the communicating portion-side threaded portion 106 and the nut-side threaded portion 107. This attaches the base 105 to the communicating portion 103 via the sixth packing P6 in a watertight manner, and the filter F1 can be attached by being sandwiched between the base 105 and the nut 104. Because the nut 104 is cylindrical, the filter F1 is exposed to the outside at the center of the nut 104, as shown in FIG. 7.

[0068] 8, the filter F1 can be removed simply by rotating the nut 104 in the opposite direction relative to the communication part 103 to remove the nut 104. Therefore, the filter F1 can be attached and detached without removing the main body 5, which simplifies maintenance work such as replacing the filter F1.

[0069] The communicating portion 103 is disposed at the lower end portion of the side wall portion 52 of the main body 5, and the lower end 103a of the communicating portion 103 is disposed at the same height as the inner bottom 12 of the main body 5 in the vertical direction. The inner bottom 12 of the main body 5 and the lower end 103a of the communicating portion 103 are flush with each other, and even if wastewater A or the like accumulates in the inner bottom 12 of the main body 5, the wastewater A or the like can be easily discharged to the outside of the main body 5 through the communicating portion 103, facilitating cleaning work such as removing the wastewater A. Incidentally, the lower end 103a of the communicating portion 103 can also be disposed a predetermined distance below the inner bottom 12 of the main body 5 in the vertical direction.

[0070] 8, the lower end 103a of the communicating portion 103 is disposed a predetermined distance above the outer bottom portion 13 of the main body 5. This ensures a space below the communicating portion 103 for the nut 104 to be present, thereby realizing the threaded engagement between the communicating portion-side threaded portion 106 and the nut-side threaded portion 107. For this reason, the inner bottom portion 12 of the main body 5 is raised above the outer bottom portion 13 of the main body 5 by an amount sufficient to allow the nut 104 to be present.

[0071] 7, a hollow space 108 is formed between the outer bottom 13 and inner bottom 12 of the main body 5. A first rib portion 109 and a second rib portion 110 are provided in the hollow space 108, extending downward from the inner bottom 12 of the main body 5. The first rib portion 109 is formed in a circular shape and disposed in the center of the hollow space 108, and the second rib portions 110 are formed in linear shapes extending radially around the first rib portion 109, with multiple second rib portions 110 provided at intervals in the circumferential direction.

[0072] In the fourth embodiment, the configuration of the valve member 7 and the lid 9 is partially modified compared to the first embodiment. As shown in FIG. 8 , a valve member-side packing mounting portion 79 for mounting an annular seventh packing P7 (for example, packings of various shapes can be applied) is provided inward of the outer wall portion of the upper end portion 53 of the main body 5. The lid 9 also has a lid-side packing mounting portion 93 corresponding to the valve member-side packing mounting portion 79. The valve member-side packing mounting portion 79 is formed in a convex shape that protrudes horizontally, and the lid-side packing mounting portion 93 is formed in a convex shape that protrudes downward. The lid 9 is attached to the main body 5 via the seventh packing P7 to make the interior of the main body 5 watertight. Incidentally, although the shapes of the inlet portion 3, outlet portion 4, etc. are slightly modified in the fourth embodiment, the functions and configurations are basically the same as those of the first embodiment, and therefore detailed description thereof will be omitted.

[0073] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0074] (1) In the above embodiment, the inlet section 3 and the outlet section 4 are arranged in opposing positions. However, for example, the inlet section 3 and the outlet section 4 can also be arranged in perpendicular positions, and the arrangement can be changed as appropriate.

[0075] (2) In the above embodiment, the main body 5 is exemplified as being cylindrical, but it may also be formed into a polygonal cylindrical shape, for example, and the shape of the main body 5 can be changed as appropriate.

[0076] (3) In the above embodiment, the communication part 101 is always in a state of communication with the outside of the main body 5. However, for example, it is also possible to provide a shutter member that switches the communication part 101 to a state of communication with the outside of the main body 5 before rotating the reservoir 6 relative to the main body 5, and switches the communication part 101 to a state of not being in communication with the outside of the main body 5 by rotating the reservoir 6 relative to the main body 5. [Explanation of symbols]

[0077] 1 drain trap 3 Inlet 4 Discharge section 5 Main unit 6 Reservoir 7 Valve member 8 Water sealing body 9 Lid 51 Main body opening 52 Side wall of main body 100 Space between reservoir and main body 101 Communication part (communication hole part) 103 communicating part (cylindrical part) A Drainage F Filter F1 Filter P1 First packing (equivalent to packing)

Claims

[Claim 1] a cylindrical body having an inlet portion into which wastewater flows and an outlet portion from which the wastewater is discharged; A reservoir is provided inside the main body in a state of communication with the inlet and the outlet and forming a space between the main body and the reservoir, and the reservoir stores wastewater flowing in from the inlet, the inlet and outlet are disposed on a side wall of the main body; The reservoir is provided so as to be freely attached to and detached from the main body, The main body is disposed in a drainage path so as to connect the inlet portion and the outlet portion to the drainage path; The inlet portion and the outlet portion are a drain trap formed in a tubular shape to allow drainage to flow.

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