JP2001032348A - Drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a drain pipe from being clogged with rubbish while retaining a high speed stream in the drain pipe and safely use the drain trap which can be presentably and compactly used without using a waterproof pan and can be set to the drain pipe by using a specially shaped socket even when the diameters of drain pipes are different from each other and can be easily installed. SOLUTION: A cover body 1 fitted to a drain inlet B of a floor face A and put on the floor face is provided with a hose,joint 3 having a drain hole 2, a waterproof 4 box in which the hose joint 3 is internally provided, a special shaped cylindrical socket 8 in which a large diameter cylinder 5 and a small diameter cylinder 6 are integrally formed at the tapered inclined wall part 7. A drain pipe C is connected to the small diameter cylinder 6 of the cylindrical socket 8 and inserted in the drain pipe C. A water seal cup body 10 inserted in the drain pipe C and provided with overflow holes 9 and a draining cylindrical trap-shaped body 11 having gaps for flowing water at the inner peripheral part and the lower part of the water seal cup body 10 and inserted in the water seal cup body 10 and retained therein are put on the cover body 1. Further, a gap for flowing water is formed in the trap shaped body 11 and a guide pipe 12 integrally formed from the hose joint 3 or connectedly extended by an adhesive is disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain trap attached to a floor drain outlet in a kitchen, a washroom, a veranda or various cabinets of a washing place, a bathroom or an apartment, and a drain hose of a washing machine or the like. Drain trap.

[0002]

2. Description of the Related Art A conventional drain trap is provided with a hose joint, is connected to a drain hose of a washing machine, and is used to guide waste water (sewage) flowing out of the drain hose to a drain pipe disposed under the floor. The wastewater flows from the hose joint into the drain trap and is sent to the drain pipe side. In such a drain trap,
As disclosed in Japanese Utility Model Publication No. 60-15824, a connecting tubular portion is projected downward from a lower surface portion of a ring body attached to a drain port of a drain pipe to facilitate incorporation. A cup body provided with an overflow hole in the upper part of the peripheral surface of the suspension flange is fitted and suspended through a gap, and a hose is inserted into the cup body. Therefore, when attaching to the drain port of the floor, first, the cylindrical portion of the ring body is fitted into the drain port of the drain pipe, and the cup body is fitted and suspended in the suspension flange of the cylindrical portion via a gap, It is known that a hose is inserted into this cup body and used as a drain trap.

[0003]

In this conventional drain trap, since only one tubular portion having a predetermined pipe diameter protrudes downward from the lower surface of the ring body, the tubular portion and the drain pipe are connected. When the pipe diameters are different, two types of drain traps must be prepared, and as a result, there is a problem in that the manufacturing work and the construction work become complicated and complicated. In addition, in the case of a drain pipe with a small pipe diameter, especially in a configuration in which a water bottle is inserted into the drain pipe, the trap formation mechanism is housed in the narrow part, so that the drain flow channel cannot be sufficiently secured, and overflow and water leakage phenomenon occurs. Frequent waterproof pans are required, which is uneconomical and poor in appearance.Furthermore, lint and other garbage generated during washing are clogged in the flow path, drainage is poor, and cleaning must be done frequently. There is a drawback that occurs.

The present invention is intended to eliminate these conventional inconveniences, and uses a compact socket without using a waterproof pan, and uses a modified socket even when a drain pipe has a different diameter. The purpose of the present invention is to provide a low-cost drain trap that can be set in a drain pipe, facilitates construction work, and maintains a high flow velocity in the drain pipe, does not cause clogging of a drain port, and can be used safely. .

[0005]

SUMMARY OF THE INVENTION The present invention relates to a hose joint having a drain hole in a lid fitted to a floor drain port and mounted on the floor surface, and a waterproof box in which the hose joint is provided. And a different-diameter cylindrical socket in which a large-diameter cylindrical portion and a small-diameter cylindrical portion are integrally formed with an inclined wall portion, and a drain pipe is connected to the small-diameter cylindrical portion of the cylindrical socket, and in the drain pipe. The lid body includes a water-tight cup body that is fitted and has an overflow hole, and a trap forming body that is inserted and held in the water-tight cup body with a gap for flowing water provided between an inner peripheral portion and a lower portion of the water-tight cup body. And a guide pipe extending from the hose joint with a gap for flowing water in the trap forming body.

According to the first aspect of the present invention, since the waterproof box and the different-diameter cylindrical socket are provided on the lid placed on the floor, the drain passage in the drain trap is sufficiently provided. It is possible to secure and maintain high flow velocity in the drainage pipe without leaking, and it can be used safely without clogging phenomenon.Moreover, since the outer tubular part and the inner tubular part respectively protrude from the lid, Even when the pipe diameter of the tubular part or the inner tubular part and the drain pipe is different, the outer tubular part or the inner tubular part is connected to the drain pipe, and the drain pipe is smaller or larger than the outer tubular part. In such a case, the drain pipe may be connected to the outer tube and the inner tube with a cylindrical socket, and the hose joint, water-sealing cup body and trap forming body are detachable. Remove and clean body and trap formers It is possible.

According to the present invention, in the drain trap according to claim 1, an external thread provided on a waterproof box is removably screwed to a female thread provided on the lid, and the hose fitted on the lid. The water-sealing cup body is fixedly provided via a joint and a trap forming body, and the hose joint forms a flange portion fitted to the lid body, and a plurality of drain holes and a seal are formed in the flange portion. A step of fitting and a groove are provided for the packing to be a ring, and the packing fitted to the step and the groove is interposed between the lid and the waterproof box to be pressed and held. It is characterized by having done.

According to the present invention, in the drain trap according to the first aspect of the present invention, the lid has a disk having an attachment hole, and an outer cylindrical portion and an inner cylindrical portion provided on the lower surface of the disk with an interval. The watertight cup body is fitted to the outer cylindrical portion, the cylindrical socket is fitted to the outer cylindrical portion, and the flange portion protruding from the inner peripheral surface side of the inner cylindrical portion is formed. And the waterproof box is formed of a cylindrical or rectangular case, has a center hole at the bottom, and has a threaded cylinder or leg with a female thread on the bottom, and , An uneven portion or an operation piece for fastening operation.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 5, the drain trap in this embodiment has a drain port B on a floor surface A.
The lid 1 on which the hose joint 3 for connecting the hose D is mounted and fixed, and is connected to the drain pipe C via the cylindrical socket 8. The concentrically provided and the outer tubular section 1 ₁ and the inner tubular section 1 ₂ at intervals in the lid 1, the outer cylindrical portion 1 ₁
A cylindrical socket 8 that is fitted inserted into, the tubular is inserted into the socket 8, and water seal cup member 10 with overflow hole 9 which is fitted held inside tubular portion 1 ₂ of the cover 2
And a trap forming body 11 provided with a gap for flowing water at an inner peripheral portion and a lower portion of the water sealing cup body 10, and a hose joint 2 is provided on the lid 1 via packings 15 and 16. Are detachably equipped with and held by a waterproof box 4.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In an embodiment of the present invention, a hose joint 3 having a drain hole 2 in a lid 1 fitted on a drain port B of a floor surface A and placed on the floor surface is provided. And a different-diameter cylindrical socket 8 in which a large-diameter cylindrical portion 5 and a small-diameter cylindrical portion 6 are integrally formed with a tapered inclined wall portion 7. A drain pipe C is connected to the part 6, and a water-sealing cup body 10 fitted into the drain pipe C and having an overflow hole 9 and a gap for flowing water formed between the inner peripheral portion and the lower part of the water-sealing cup body 10. A drain-pipe-shaped trap forming body 11 inserted and held in the water-sealing cup body 10 is fitted and arranged on the lid 1, and a gap for flowing water is further opened in the trap forming body 11. A guide pipe 12 is provided which is connected to the hose joint 3 integrally or is extended by an adhesive. There as a drain trap. And
A male screw part 14 provided in the waterproof box 4 is detachably screwed to a female screw part 13 provided in the lid 1, and the hose joint 3 and the trap forming body 11 fitted to the lid 1 are fitted to the lid 1.
The water-sealing cup body 10 can be fixedly equipped via the. (FIGS. 1 and 2) The lid 1 is formed into a ring shape with an ABS resin or the like having excellent impact resistance, corrosion resistance, heat resistance, and the like, and has a plurality of mounting holes 17 (three in this embodiment). ) Are formed at intervals in the circumferential direction. This is the lower surface of the lid 1 are protruded integrally formed hanging down the outer tubular section 1 ₁ of the connection, the inner peripheral portion of the lid 1 for the connection is located within the outer tubular section 1 ₁ the inner tubular portion 1 ₂ is protruded integrally formed hanging down. These outer tubular section _{1 1} and the inner tubular section _{1 2}
Is the outer tubular section 1 ₁ or the inner tubular portion 1 ₂ is concentrically projected as connectable to the drain pipe of the drain pipe C or diameter of the enlarged diameter which is most frequently used, the outer tubular section 1 ₁ and the inner tube clearance for connection is formed between parts 1 _2. (Fig. 3)

[0011] That is, the lid 1 is a ring body with a mounting hole 17, the lower surface of the ring body, and the outer tubular section 1 ₁ and the inner tubular section 1 ₂ is suspended on a concentric circle at an interval integral made from those projected molded, the cylindrical socket 8 fitted on the outer peripheral surface of the outer tubular section 1 _1, the inner tubular portion 1 ₂
Used provided with fitted supporting the seal water cup body 10 to the flange portion 1 ₃ projecting from the inner peripheral surface side of the.

As shown in FIGS. 2 and 4, the hose joint 3 has a disc-shaped flange portion 30 fitted to the lid _1, and a hose receiving pipe 3 is provided in a center hole 31 of the flange portion 30. ₂ , a plurality of drain holes 2 are formed on the outer periphery of the pipe, and a fitting step 31 and a fitting groove 32 of a packing serving as a seal ring are provided on the upper and lower surfaces of the flange 30. The seals 15 and 16 of the seal ring fitted in the fitting step 31 and the fitting groove 32 are interposed between the lid 1 and the waterproof box 4 so as to be pressed and held. The guide pipe 12 is made of a transparent or opaque synthetic resin and is formed integrally with the hose joint 3 or is fixedly connected to the hose joint 3 via a coloring adhesive. The guide pipe 12 is fitted and connected to a pipe extending to the section, and the water sealing cup body 10 and the trap forming body 11
Trap molded body 1 at the gap _{d 1} is smaller than the gap _{d 2} between the
Fitted in 1, it is constituted to have an open end 12 ₁ from the trap formed body low end 11 ₁ to the lower position.

[0013] Examples of the waterproof box 4, as shown in FIG. 5, the cylindrical or consists square tube casing, threaded cylindrical portion 4 ₂ or legs 4 with external thread portion 14 on the bottom has a central hole 4 ₁ to the bottom ₃ as well as an uneven portion 18 or an operation piece 19 for tightening operation. And the lid 1
The female screw portion 13 provided in the waterproof box 4 is provided with a male screw portion 14 provided integrally with the waterproof box 4 or the waterproof box 4 as shown in FIG.
Male thread part 1 provided on holder member 20 fitted and deployed
4 is detachably screwed, and the hose joint 3 is pressed and fixed to the lid 1.

As the cylindrical socket 8, a large-diameter cylindrical portion 5 having a large-diameter one-end opening portion and a small-diameter cylindrical portion 6 having a small-diameter other end portion are continuously formed by an inclined wall portion 7. be one obtained by the Jo socket, the is fitted connected to the outer periphery of the outer tubular section 1 ₁ of the lid 1 is fitted connects the inner circumference or the outer circumference of the drain pipe C to the small-diameter cylindrical portion 6. Thus, the sealing cup body 1
The inclined wall portion 7 is opposed to the opening of the overflow hole 9 of zero.
The different-diameter cylindrical socket 8 designed to have the following characteristics hydrodynamically. For example, the water jet spouted from the overflow hole 9 of the water sealing cup 10 collides with the inclined wall 7 of the cylindrical socket 8 having a different diameter, and the periphery of the space formed by the inclined wall 7 and the water sealing cup 10. A vortex with strong turbulence is formed around the center, and this type of flow field has turbulence in a large and small wave number range, and particularly, it can generate a large vortex with a relatively low wave number scale, The flow velocity around the inner wall of the cylindrical socket and the wall of the water-sealing cup body fluctuates drastically, which has the effect of preventing the detergent and the like from adhering to the pipe wall. In the flow field where the flow path is contracted, the flow velocity on the contracted side (in this case, the direction outside the concentric circle) increases, and as a result, High flow velocity near the pipe wall is maintained even in the downstream To form a tube 施回 flow effectively used without the occurrence of blockage of the conduit flow.

Further, the hose joint 3 is provided with packings 15 and 16 at upper and lower portions, and is configured so as to be fitted to the lid 1 by the waterproof box 4 or the holder member 20 through the waterproof box 4, and the cylindrical socket is provided. Since the trap forming mechanism is accommodated inside the large-diameter 8, the clogging of dust can be easily prevented from occurring.

The water-sealing cup body 10 is lightweight,
Heat resistance, and is formed into a bottomed cylindrical shape such as excellent PP resin such as coloring property, a flange 10 ₁ on the upper end, at intervals rectangular overflow hole 9 in the circumferential direction on the circumferential surface upper portion a plurality (Four in this embodiment) are formed,
The trapped water acts as a trapping mechanism so as to be detachably fitted and held by the tubular trap forming body 11 with the stored water. The trap forming body 11 is formed of a PP resin into a cylindrical shape, and from the upper part to the lower part, the engaging flange 11 ₁ , the fitting cylindrical part 11
₂ and the throat portion 11 ₃ are respectively formed, the gap for the distribution between the overflow hole 9 of the throat portion 11 ₃ and the seal water cup body 10 is adapted to be formed.

[0017] In the example of FIGS. 6-8, a hose receiving pipe 3 _second open lower end of the hose joint 3 is extended downward, and fitting the guide pipe 12 in said extension setting pipe 3 _3,
While deployed against the bottom surface of the seal water cup body 10 to the lower end of the guide pipe 12 as an opening end 12 ₁ that the notch, the holder member 20 to be fitted into the center hole 4 ₁ of waterproof box 4
As a result, the male screw portion 14 provided on the holder member 20 is screwed into the female screw portion 13 of the lid 1 so that the hose joint 3
The waterproof box 4 is fixed to the lid 1 through
The sealing cup body 10 and the trap forming body 11 can be easily incorporated and set. In this case, the holder member 20 is provided with an operation piece 19 for screwing operation, so that the trap forming mechanism including the water sealing cup body 10 can be easily attached to and detached from the drain pipe C. The waterproof box 4
Is are the legs 4 ₃ to the bottom surface using what was square tubular shape provided data to improve concealment of shimming and water outlet B of the lid 1 provided with a leg portion 4 ₃ as the cylindrical portion Is also good.

In either of the examples shown in FIGS. 1 and 6, in order to attach the drain trap to the washing machine, first, the pipe diameter of the drain pipe C provided on the floor surface is checked, and the outer cylindrical portion 1 of the lid 1 is checked. ₁
Or tubular socket 8 is connected to one of the inner tubular portion 1 _2. Then, the lid 1 on the floor and secured with screws from the plurality of mounting holes 17, fitted with is fitted drooping seal water cup body 10, a trap formed body 11 to the seal water cup body 10 to the inner tubular part 1 ₂ Hold. Then, the hose joint 3 is fitted to the lid 1 from above via the packings 15 and 16, and is fixed by the waterproof box 4 or the waterproof box 4 and the holder member 20. Then, by inserting connecting hose D of the washing machine to the hose receiving pipe 3 ₂ of the hose joint 3, it is possible to terminate the construction work of the drain trap.

When sewage flows from the hose D of the washing machine in such a state, the sewage flows from the hose joint 3 to the guide pipe 12, the trap forming body 11, the water sealing cup body 10, the overflow hole 9, and the cylinder. It flows out to the drain pipe C via the socket 8 in sequence. It is to be noted that the malodor coming through the drain pipe C reliably flows into the overflow hole 9 and the trap forming body 11 composed of the drainage cylinder by the trapping action of the sewage stored in the water sealing cup body 11. Suppression is prevented. Further, since the guide pipe 12 is provided at the center of the trap forming body 11, the sealing water of the water sealing cup body does not overflow, and even if water leaks from the hose, it is received by the waterproof box 4 and the floor surface is received. Can be made to flow down from the overflow hole 9 to the drain pipe C from the drain hole 2 through the trap forming body 11 and the water sealing cup body 10 without being contaminated.

According to the above arrangement, since the two types of different from the lower portion of the pipe diameter of the outer tubular section 1 ₁ and the inner tubular section 1 ₂ lid 1 is protruded, drainage pipes than the outer tubular section 1 ₁ C Even when the pipe diameter is small, it is possible to appropriately select and connect to the drain pipe C with the cylindrical socket 8. Therefore, there is no need to prepare a plurality of drain traps according to the diameter of the drain pipe C. Through this, it is possible to greatly simplify, increase efficiency, and facilitate manufacturing and construction. The lid body 1, the outer tubular section _{1 1,} and the inner tubular section _{1 2} A
Since it is integrally molded with a synthetic resin such as a BS resin, it does not rust, can greatly maintain cleanliness, and is extremely easy to handle. Further, since a large number of projections and depressions 18 are formed on the waterproof box 4, the removal and operation of the trap mechanism are extremely easy and convenient.

[0021] Incidentally, the the lid 1 by being screwed to the floor A consists annular plate having an inner outer tubular section 1 _1, 1 ₂ at the bottom, secured to the lid 1 the floor A Is done. Further, it provided hanging flange 1 ₃ on the section projecting to the inner circumferential surface of the inner tubular portion 1 ₂ of the lid 1 around the circumference, the flange portion 1 _3, the cup-shaped water seal cup member 10 of the It supports when inserted, and has a female screw portion 13 corresponding to the male screw portion 14 of the waterproof box 4 at the opening.

[0022] In these embodiments, the large-diameter cylindrical portion 5 is fitted on the outer periphery of the outer tubular section 1 ₁ of the lid 1 of the end opening of the tubular socket 8, the smaller-diameter tubular portion 6 of the other end opening It is fitted and fixed to the outer periphery of the drain pipe C and connected and connected, so that it is possible to easily form a line of a pipe system having a different diameter. In these cases, consideration is given to forming a step portion as necessary in the connection portion to optimize the sealing property, and to facilitate flowability by interposing a taper portion.

[0023]

According to the present invention, there is provided a hose joint having a drain hole in a lid fitted on a floor drain port and placed on the floor surface, a waterproof box in which the hose joint is provided, and a large-diameter hose. A cylindrical section having a cylindrical section and a small-diameter cylindrical section integrally formed with an inclined wall section, and a drain pipe connected to the small-diameter cylindrical section of the cylindrical socket, and fitted into the drain pipe to overflow; A watertight cup body having a hole, and a trap forming body inserted and held in the watertight cup body with a gap for flowing water provided between an inner peripheral portion and a lower portion of the watertight cup body, are fitted and provided on the lid body. And
In addition, by providing a guide pipe extending from the hose joint with a gap for running water in the trap forming body, the hose joint can be detached via a packing in a waterproof box having a cylindrical socket of a different diameter. Because it is held on the lid, it can be used even when the drain pipe diameter is different, it is easy to connect the pipes that can fully demonstrate the drain trap function, and the construction work is simple, versatile, and drainage The trap mechanism is housed in a cylindrical socket with a different diameter with a slanted wall, so there is sufficient drainage flow and there is no clogging of garbage. A vortex with strong turbulence is formed around the space where the turbulence occurs, and this type of flow field has turbulence in a large and small wave number range, especially a large vortex with a relatively low wave number scale. Because of this, the flow velocity around the inner wall of the cylindrical socket and the wall of the sealing cup body fluctuates drastically, which has the effect of preventing the adhesion of detergent etc. to the pipe wall, and the inclined wall of the cylindrical socket has This also affects the radial flow velocity distribution further downstream, and in a flow field where the flow path is reduced, the flow velocity on the reduced side increases, and as a result,
The high flow velocity near the pipe wall is maintained even in the downstream part after the cup, forming a circulating flow inside the pipe, effectively using it without the clogging phenomenon of the pipe flow, and requiring no frequent cleaning work and safe handling. There is an effect that a simple drain trap can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a drain trap according to the present invention is used.

FIG. 2 is a perspective view showing a separated state of the example of FIG. 1;

FIG. 3 shows the lid of the example of FIG. 1, (a) is a side view thereof,
(B) is a plan view thereof.

FIGS. 4A and 4B show the hose join of the example of FIG. 1, in which FIG. 4A is a side view and FIG.

FIGS. 5A and 5B show the waterproof floor of the example of FIG. 1, in which FIG. 5A is a plan view and FIG. 5B is a longitudinal sectional view.

FIG. 6 is a longitudinal sectional view of a use state showing another embodiment of the present invention.

7A and 7B show the hose joint of the example of FIG. 6, in which FIG. 7A is a plan view, FIG. 7B is a bottom view, and FIG. 7C is a longitudinal sectional view in combination with a fixing member.

8 shows a waterproof floor of the example of FIG. 6, (a) is a plan view thereof, and (b) is a longitudinal sectional view thereof.

[Explanation of symbols]

A Floor surface B Drainage port C Drainage pipe D Connection hose 1 Lid 1 ₁ Outer cylinder 1 ₂ Inner cylinder 1 ₃ Flange 2 Drain hole 3 Hose joint 4 Waterproof box 5 Large diameter cylinder 6 Small diameter cylinder 7 Inclined wall Part 8 Cylindrical socket 9 Overflow hole 10 Water-sealing cup body 11 Trap forming body 12 Guide pipe 12 ₁ Open end 13 Female screw part 14 Male screw part 15, 16 Packing 17 Mounting hole 30 Flange part 31 Fitting step part 32 Fitting concave part

Claims (9)

[Claims] 1. A hose joint having a drain hole in a lid fitted on a floor drain port and placed on the floor surface, a waterproof box in which the hose joint is provided, a large-diameter cylindrical portion and a small-diameter tube joint. A cylinder having a cylindrical portion integrally formed with an inclined wall portion, and a drain pipe connected to a small-diameter cylindrical portion of the cylindrical socket, and a sealing member having an overflow hole fitted into the drain pipe. A water cup body, and a trap forming body that is inserted and held in the water sealing cup body with a gap for flowing water provided between an inner peripheral portion and a lower portion of the water sealing cup body, are fitted to the lid body, and further provided. A drain trap, wherein a guide pipe extending from the hose joint is provided with a gap for flowing water in the trap forming body. 2. A water-sealing cup body which is detachably screwed with a male screw part provided on a waterproof box with a female screw part provided on the lid, and which is fitted through the hose joint and the trap forming body fitted on the lid. The drain trap according to claim 1, wherein the drain trap is fixedly equipped. 3. The hose joint forms a flange portion to be fitted to the lid, and the flange portion has a plurality of drain holes, a fitting step portion of a packing serving as a seal ring, and a fitting concave groove. The packing according to claim 1 or 2, wherein a packing fitted in the fitting step portion and the fitting groove is interposed between the lid and the waterproof box and pressed and held. Drain trap. 4. A ring body having a mounting hole, wherein the lid body has a mounting hole.
An outer cylindrical portion and an inner cylindrical portion are formed on the lower surface of the ring body so as to hang down concentrically with an interval therebetween and are integrally formed with the outer cylindrical portion, and the cylindrical socket is fitted to the outer cylindrical portion, and the inner cylindrical portion is fitted. 4. The drain trap according to claim 1, wherein the water sealing cup body is fitted and supported on a flange portion protruding from an inner peripheral surface of the portion. 5. The waterproof box is formed of a cylindrical or rectangular case, has a center hole at the bottom, and has a threaded cylinder or a leg with a male thread at the bottom, and has a tightening operation. The drain trap according to claim 4, comprising an uneven portion. 6. The drain trap according to claim 4, wherein the guide pipe is made of a transparent synthetic resin and is formed integrally with the hose joint. 7. The drain trap according to claim 4, wherein the guide pipe is fixedly connected to the hose joint via an adhesive. 8. The guide pipe is inserted into the trap forming body with a gap smaller than the gap between the drain cup body and the trap forming body, and has an opening below the lower end of the trap forming body. The drain trap according to claim 6 or 7, wherein the drain trap is provided. 9. A female screw part provided on the lid body is removably screwed with a male screw part provided on a holder member fitted and arranged in a waterproof box, and the hose joint is pressed and fixed to the lid body. The drainage trap according to claim 6, 7, or 8, wherein: