JP2000160622A - Drainage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of reverse flow for the other drainage instrument connected to a drain introduction pipe by protruding a reverse flow prevention protrusion part on the peripheral edge or in the neighborhood of the peripheral edge of the drain flow passage side of an introduction hole provided on an introduction pipe connection part. SOLUTION: A drain opening 2 and a drain outlet 3 are provided, and an introduction pipe connection part 4 providing an introduction hole 5 for connecting a drain introduction pipe P for introducing drain from the other drain instrument into a drain flow passage is provided on a drain device body part 1 forming the drain flow passage in the inside. In the drain device body part 1 of such a constitution, a reverse flow prevention protrusion part 6 such as a wall and a stage part is provided on the peripheral edge or a part or the whole part of the neighborhood of the peripheral part of the drain flow passage side of the introduction hole 5. Thus, the flow of drain is controlled by the reverse flow prevention protrusion part 6, the drain intruded in the introduction hole 5 is reduced remarkably, and the reverse flow for the other drain instrument connected is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to an improvement of a drainage device attached to a waterproof pan, a sink, a wash basin or the like of a bathroom or a bathtub.

[0002]

2. Description of the Related Art Conventionally, a drainage device is attached to a waterproof pan, a sink, a wash basin, and the like of a bathroom and a bathtub in order to treat drainage generated by using equipment. These drainage devices include those that simply discharge wastewater from drainage outlets to drainage outlets, and those that have a function called a drainage trap that prevents odors and pests from entering the indoor side from the sewage side. It has been known. In these drainage devices, a plurality of drainage devices may be connected for reasons of piping configuration. When such piping is performed, a pipe member (hereinafter referred to as a “drain introduction pipe”) that is connected to a discharge port of an upstream drainage device (hereinafter referred to as a “drainage device”) and includes a pipe, a hose, an inner part, and a joint. In order to connect the drainage device to the downstream drainage device (hereinafter simply referred to as “drainage device”), the drainage device is also widely known to have an inlet pipe connection portion for connecting a drainage inlet pipe. ing.

FIGS. 13 and 14 and FIGS. 15 and 16 show well-known examples of the above drainage device.
Is known.

Hereinafter, the drainage device shown in FIGS. 13 and 14 will be described with reference to the drawings. The drainage device shown in FIGS. 13 and 14 is composed of a drainage device main body and a flange member. The structure of the drainage device is described below. The drainage device main body is provided with a drainage port and a discharge port, and has a drainage flow path formed therein. It is provided with an introduction pipe connecting portion having an introduction hole for connecting a drainage introduction pipe for introducing wastewater into the drainage flow path. The flange member is
It is formed of a cylinder having an opening having a substantially inverted L-shaped cross section, and the outer surface of the cylinder is configured to be in water-tight engagement with the drain port of the drain device main body.

In the case of using the drainage device constructed as described above, first, as shown in FIG. 13, a drainage device main body is attached to the periphery of an attachment hole provided in a waterproof pan or the like using a flange member. . Next, a drainage introduction pipe composed of a pipe or the like connected to another drainage device is connected to the introduction pipe connection portion, and further, the outlet is connected to the sewage through a pipe or the like. In the drain device provided in this way, when drain water flows from the drain port, the drain water flows from the drain port to the drain port through the drain channel, and is further discharged to the sewage side. In addition, when drainage occurs in other drainage equipment connected to the drainage introduction pipe, the drainage flows from the drainage introduction pipe into the main body of the drainage device through the introduction hole of the introduction pipe connection part, and passes through the drainage flow path to the drainage outlet. It is discharged to the sewage side.

Next, the drainage device shown in FIGS. 15 and 16 will be described with reference to the drawings. The drainage device shown in FIGS. 15 and 16 is composed of a drainage device main body, an odor preventing cylinder, and a flange member. The structure of the drainage device is described below. The drainage device main body has a cylindrical watertight chamber having an opening at the upper end for storing drainage at a certain depth, and overflows from the opening at the upper end of the watertight chamber. An outer wall portion forming a drainage channel through which drainage flows, a cylindrical outlet provided on a side surface of the outer wall portion for discharging drainage, and a drainage outlet provided above the drainage device main body,
And an introduction pipe connecting portion provided with an introduction hole for connecting a drainage introduction pipe for introducing drainage from another drainage device into the drainage flow channel, which is provided on a side surface of the water sealing chamber. The flange member is formed of a cylinder having an opening having a substantially inverted L-shaped cross section, and the outer surface of the cylinder is configured to be in water-tight engagement with the drain port of the drain device main body. . The deodorizing cylinder has a cylindrical shape with upper and lower openings, and the upper end of the cylinder is detachably and watertightly engaged with the flange member,
Further, the lower opening is disposed in the watertight chamber when engaged, and the height of the lower opening is higher than the height of the bottom surface of the watertight chamber. In use, the upper end of the deodorizing cylinder is configured to engage with the flange member in a watertight manner, and the flange member is configured to engage in a watertight manner with the drain port of the main body of the drainage device. The upper end of the water bottle is held in a watertight state with respect to the drain port of the drain device main body.

In the case of using the drainage device configured as described above, as shown in FIG. 15, the drainage device main body is attached to the periphery of the attachment hole provided in the waterproof pan or the like using a flange member. Next, the deodorizing cylinder is engaged with the opening of the flange member in a watertight manner. Further, a drainage introduction pipe connected to another drainage device is connected to the introduction pipe connection portion, and an outlet is connected to the sewage side via a pipe or the like. In the drainage device provided in this manner, when drainage flows from the drainage outlet, the drainage channel is formed as described below and is discharged to the sewage side. Drainage from the drainage port falls directly below the deodorizing cylinder and collides with the bottom of the water sealing chamber. Due to this collision, the drainage forms a flow that spreads along the bottom surface, proceeds to the inner side of the watertight chamber, and then rises between the outer side of the odor control cylinder and the inner side of the watertight chamber, opening the watertight chamber. The water flows from the drainage channel to the outlet through the drain, and is discharged to the sewage side from the outlet. In addition, when drainage occurs in other drainage equipment connected to the drainage introduction pipe, the drainage flows from the drainage introduction pipe into the watertight chamber in the drainage device main body through the introduction hole of the introduction pipe connection part, and the drainage passage is formed. Through the outlet to the sewage side. When the drainage flows into the drainage device having the structure as shown in FIGS. 13 and 14, the drainage accumulates in the sealed chamber of the drainage device (the water collected in the sealed chamber is hereinafter referred to as "sealed water"). Even if foul odors and pests enter the indoor area through the discharge port from the sewage side, the path is blocked by this water sealing and it is not possible to enter the indoor area any more.
It is possible to prevent pests and the like from entering the room. That is,
The drainage device shown in the conventional example of FIGS. 15 and 16 has a trap function.

[0008]

When drainage is actually passed through a drainage device provided with an inlet pipe connection as shown in the above-mentioned conventional example, when drainage flows along a drainage flow path, Some of the wastewater flows into the drainage pipe from the inlet. For example, in the case of the drainage device shown in FIGS. 13 to 14, part of the drainage flowing along the inner side surface of the drainage device main body flows into the introduction hole in the drainage device main body and rises in the drainage introduction pipe. Go. When the amount of drainage is large and strong, the drainage overflows to the drainage device connected to the drainage introduction pipe, and a phenomenon called backflow occurs. In the case of the drainage device shown in FIGS. 15 and 16, the drainage from the drainage port collides with the bottom surface of the watertight chamber and spreads almost uniformly in all directions. Of this, of course, the drainage flowing from the center toward the introduction hole flows into the drainage introduction pipe, but most of the wastewater actually flowing into the drainage introduction pipe is the drainage that has spread in other directions. By the time it rises on the inner side, it collides with the inner side of the watertight chamber, and then spreads right and left along the inner side, so that it flows into the introduction hole. Again,
Of course, if the amount of drainage is large and vigorous, the drainage may overflow to the drainage device connected to the drainage introduction pipe, causing backflow. This backflow phenomenon is, of course, undesirable from the viewpoint of aesthetics and hygiene, but especially after cleaning the drainage equipment connected to the drainage introduction pipe, if there is a large amount of drainage in the drainage device and backflow occurs, It is necessary to clean the drainage equipment and the like at the connection source again, which causes a problem that efficiency is remarkably deteriorated.

In order to solve the above-mentioned problem of backflow, for example, a drainage device having a structure provided with a valve member for backflow prevention, which performs opening / closing operation using buoyancy of water or the like at a connection portion of an inlet pipe, is devised. However, in order for the drainage device to have such a structure, a plurality of members must be prepared, and the cost of the products increases because the member costs and the assembly costs increase. Furthermore, if the product has been used for a long period of time, the valve member may be damaged or dust may be attached, so that the function of the opening and closing operation of the valve member may not work and the performance may be deteriorated. In addition, since the opening area of the drainage introduction pipe is reduced by the space occupied by the valve member when the valve member is opened, the drainage performance of the drainage device connected to the drainage introduction pipe is deteriorated. Also, if the valve member breaks down or malfunctions, and the valve is closed and fixed, the drainage of the drainage equipment connected to the drainage introduction pipe may not be treated,
There was such a problem. The present invention has been made in view of the above problems, and in using a drainage device, a drainage device capable of preventing a backflow from occurring in a drainage device connected to an introduction pipe connection portion without using a valve member or the like. Is provided.

[0010]

According to a first aspect of the present invention, there is provided a drainage device including a drainage port (2) and a drainage port (3);
Drainage device body with a drainage channel formed inside (1)
And a drain hole (5) provided in the drain device body (1) for connecting a drain pipe (P) for introducing drain water from another drain device into the drain channel. It is characterized by comprising an inlet pipe connection part (4), and a backflow prevention convex part (6) provided on a part of or a whole of the periphery of the introduction hole (5) on the drain flow path side or the vicinity of the periphery. Drainage device.

A drainage device according to a second aspect of the present invention is the drainage device according to the above-mentioned drainage device, wherein the backflow prevention projection (6) is formed in a wall shape having an appropriate thickness.

According to a third aspect of the present invention, in the drainage device, the backflow prevention convex portion (6) extends laterally to an adjacent plane and has a stepped shape. It is a drainage device.

According to a fourth aspect of the present invention, in the drainage device, the backflow preventing projection (6) is provided integrally with the drainage device main body (1). It is.

According to a fifth aspect of the present invention, in the above drainage device, the backflow prevention projection (6) is provided with a backflow prevention member (6a) independent of the drainage device main body (1) and the drainage introduction pipe (P). ), Wherein the drainage device is configured as described above.

According to a sixth aspect of the present invention, in the drainage device, the backflow prevention convex portion (6) is provided at a distal end of a drainage introduction pipe (P) for introducing drainage from another drainage device. The drainage device according to the above description, characterized in that:

According to a seventh aspect of the present invention, in the drainage device, the drainage device has a trap function of preventing odors, pests, and the like from entering the drainage port (3) toward the drainage port (2). The drainage device according to the above, wherein the drainage device is provided.

In the drainage device according to the present invention, in the drainage device, the drainage device may be provided with an opening (7a) at an upper portion and an introduction pipe connecting portion (4) having an introduction hole (5) on a side surface. ), A backflow prevention protrusion (6) provided on a part of or a part of the periphery of the introduction hole (5) on the drain flow path side or in the vicinity of the periphery, and the water sealing chamber (7). An outer wall portion (8) forming a drainage channel (9) through which drainage overflows from the open portion (7a) of (7) flows, a drain port (2) provided above the outer wall portion (8), and drainage. The drainage device main body (1), which comprises a discharge port (3) provided at an arbitrary position on the outer wall (8), and an upper and lower opening, and the upper end (10a) of the cylinder drains during use. The device is maintained in a watertight state with respect to the drain port (2) of the main body (1), and the lower opening is used in the watertight chamber (7) when used. And a deodorizing cylinder (10) arranged at a position higher than the height of the bottom surface of the water sealing chamber (7). It is a drainage device with a trap function.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. The first embodiment of the present invention shown in FIGS. 1 and 2 is constituted by a drain device main body (1) and a flange member (11). The structure of the drainage device main body (1) is provided with a drainage port (2) and a discharge port (3), and a drainage channel is formed therein. An introduction pipe connecting portion (4) having an introduction hole (5) for connecting a drainage introduction pipe (P) for introducing drainage from another drainage device into a drainage channel on the side surface of 1); The introduction hole (5) is provided with a backflow prevention projection (6) formed of a protruding wall surface on the entire periphery of the drainage flow path side. Further, the flange member (11) is formed of a cylinder having an opening (11a) having a substantially inverted L-shaped cross section, and the outer surface of the cylinder is provided with the drain port (2) of the drain device main body (1). It is configured to engage in a watertight manner.

When the drainage device constructed as described above is used, as shown in FIG. 1, the drainage device is first mounted on the periphery of a mounting hole (W) provided in a waterproof pan or the like by using a flange member (11). Attach the main body (1). Next, a drainage introduction pipe (P) composed of a pipe or the like connected to another drainage device is connected to the introduction pipe connection portion (4), and further, the discharge port (3) is connected to the sewage side via a pipe or the like. I do. In the drainage device provided in this way, when the drainage flows from the drainage port (2), the drainage flows down along the inner side surface of the drainage body (1), but the drainage flowing near the introduction hole (5) is introduced. Since it collides with the backflow prevention convex portion (6) provided on the periphery of the hole (5), the direction of the flow can be changed to the direction that is the least difficult to flow into the introduction hole (5) and diffuses from the introduction hole (5). . As a result, almost no drainage flows into the introduction hole (5), so that a backflow does not occur in the drainage device connected to the drainage introduction pipe (P), and the drainage smoothly flows along the drainage channel (the drainage outlet (P)). It is discharged from 3) to the sewage side. When drainage occurs from another drainage device connected to the drainage introduction pipe (P), the wastewater is drained from the drainage introduction pipe (P) through the introduction hole (5) of the introduction pipe connection part (4). Although it flows into the part (1), since the backflow prevention convex part (6) hardly affects the flow of the drainage from the drainage introduction pipe (P), the conventional drainage device shown in FIGS. In the same manner as described above, the water is discharged from the discharge port (3) to the sewage through the drain passage.

Next, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment of the present invention shown in FIGS. 3 and 4 is composed of a drain device main body (1), an odor control cylinder (10), and a flange member (11). The structure of the drainage device body (1) is as follows. The drainage device main body (1) has a cylindrical watertight chamber (7) having an opening (8) at an upper end for storing drainage at a certain depth, and A cylindrical outer wall portion (8) forming a drainage channel (9) through which drainage overflows from an open portion (8) at the upper end of the chamber (7), and a circular drainage provided above the outer wall portion (8). Mouth (2), cylindrical outlet (3) provided on the side of outer wall (8) for discharging wastewater, and drainage from other drainage equipment provided on the side of watertight chamber (7). For connecting a drainage introduction pipe (P) that introduces water into the drainage flow path,
An inlet pipe connecting portion (4) having an inlet hole (5), and a backflow prevention convex portion (a part of a peripheral edge of the inlet hole (5) on the drain passage side) formed of a protruding wall surface. 6). Further, the flange member (11) is formed of a cylinder having an opening (11a) having a substantially inverted L-shaped cross section, and the outer surface of the cylinder is provided with the drain port (2) of the drain device main body (1). It is configured to engage in a watertight manner. The deodorizing cylinder (10) has a cylindrical shape with upper and lower openings, and the upper end (10a) of the cylinder is detachably and watertightly engaged with the flange member (11). It is arranged in the water sealing chamber (7), and is configured so that the height position of the lower opening is higher than the height position of the bottom surface of the water sealing chamber (7). In use, the deodorizing cylinder (10)
The upper end (10a) of the cylinder water-tightly engages with the opening (11a) of the flange member (11).
1) is configured so as to be engaged with the drain port (2) of the drain device body (1) in a water-tight manner. ) Is kept watertight with respect to the drain port (2).

When the drainage device constructed as described above is used, as shown in FIG. 3, the drainage device is mounted on the periphery of the mounting hole (W) provided in the waterproof pan or the like by using the flange member (11). Attach the main body (1) and then the flange member (11)
The upper end (10) of the deodorizing cylinder (10) is inserted into the opening (11a) of the
a) is engaged in a watertight manner. Furthermore, the drainage introduction pipe (P) connected to another drainage device is connected to the introduction pipe connection part (4), and the discharge port (3) is connected to the sewage through a pipe or the like. Since the second embodiment is configured as described above, water is sealed in the water sealing chamber (7) during use. That is, the present drainage device is provided with a trap function capable of preventing bad smells, pests and the like from entering the room from the sewage side to the drainage port. In the drainage device provided in this way, when drainage is caused to flow from the drainage port (2), the drainage channel is formed as follows and discharged to the sewage side. Drainage from the drainage port (2) falls directly below the inside of the deodorizing tube (10) and collides with the bottom surface of the water sealing chamber (7). Due to this collision, the drainage forms a stream that spreads almost uniformly in all directions along the bottom surface. Of these, the drainage that has spread in a direction other than the direction toward the introduction hole (5) from the center, rises between the side surface of the water sealing chamber (7) and the side surface of the deodorizing cylinder (10), and then rises. Collision with the inner side surface of 7), and then spreads right and left along the inner side surface. The direction of the flow can be changed to the direction that is the least difficult to flow into the introduction hole (5) and diffuses from the introduction hole (5). Thereby, the flow of the drainage flowing into the introduction hole (5) is only a small amount of drainage flowing from the center toward the introduction hole (5). Almost no drainage occurs, and most of the drainage can be smoothly discharged from the drain (3) to the sewage through the drainage channel (9). Further, when drainage occurs from another drainage device connected to the drainage introduction pipe (P), the drainage is discharged from the drainage introduction pipe (P) through the introduction hole (5) of the introduction pipe connection part (4). Although it flows into the part (1), since the backflow prevention convex part (6) hardly affects the flow of the drainage from the drainage introduction pipe (P), the conventional drainage device shown in FIGS. Similarly, the water is discharged to the sewage side from the discharge port (3) through the drain passage.

Although the embodiment of the drainage device according to the present invention is as described above, the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the invention. For example, a backflow prevention protrusion provided in a drainage device (6)
May be constituted by a backflow prevention member (6a) independent of the drainage device main body (1) and the drainage introduction pipe (P) as shown in FIG. 5, or other drainage as shown in FIG. It may be constituted by the distal end of a drainage introduction pipe (P) for introducing wastewater from the equipment.

In providing the backflow preventing convex portion (6), the backflow preventing convex portion (6) may be partially or entirely provided on the periphery of the introduction hole (5) as long as its function can be sufficiently ensured. You may be prepared to hang on.

When the present invention is applied to a drainage device having a trap function, the structure of the drainage device having the trapping function is not limited to the structure as in the second embodiment. For example, like the drainage device shown in FIG.
It can also be used in a drainage device with a trap function having a structure mainly used for a sink, and a drainage device with a trap function having a so-called running trap structure shown in FIG. In the drainage device to which these trap functions are added, the drainage device in FIG. 7 drains water falling along the inner side surface of the drainage device main body (1), and the drainage device in FIG. ) Is changed in the direction in which the drainage spreads left and right along the inner side surface in the direction most difficult to flow into the introduction hole (6), so that backflow can be prevented.

In each of the above embodiments, the backflow preventing protrusion (6) is formed as a wall having an appropriate thickness in any case, but the backflow preventing protrusion (6) is adjacent to the backflow preventing protrusion (6). It is also possible to extend in the horizontal direction up to a plane to form a step. In the embodiment shown in FIGS. 9 to 10, the backflow prevention protrusion (6) extends laterally along the inner peripheral surface of the drainage device main body (1), and the backflow prevention protrusion (6) is circular. Stepped shape. In the drainage device shown in FIGS. 9 to 10, the drainage flowing near the introduction hole (5) collides with the upper surface of the step-shaped backflow prevention convex portion (6) provided in the drainage device main body (1). The direction of the flow can be changed to the direction that is most difficult to flow into the introduction hole (5) and diffuses from the introduction hole (5). As a result, almost no drainage flows into the introduction hole (5), so that a backflow does not occur in the drainage device connected to the drainage introduction pipe (P), and the drainage smoothly flows along the drainage channel (the drainage outlet (P)). It is discharged from 3) to the sewage side.

Further, like the drainage device of the embodiment shown in FIGS. 11 and 12, the backflow prevention convex portion (6) of the drainage device shown in the second embodiment is connected to the inner periphery of the water sealing chamber (7). It may be configured such that it extends in the lateral direction along the surface to form a step. In this case, the flow of the drainage spreading along the bottom surface of the water sealing chamber (7) collides with the backflow prevention protrusion (6) before the side surface of the water sealing chamber (7). As for the momentum at the time of collision, the larger the expansion of the bottom surface of the water sealing chamber (7) is, the more the urging is made and the stronger it is.
11 to 1 than the conventional drainage device of FIG.
In the drainage device of the embodiment shown in FIG. 2, the momentum of the collision is weaker because the bottom surface of the water sealing chamber is smaller. When the momentum of the collision is weakened, the momentum of the drainage generated along the backflow prevention convex portion (6) caused by the collision is also weakened. That is, the upward flow of the drainage becomes stronger. As a result, the upward flow becomes smooth, and conversely, the amount of drainage flowing into the introduction hole (5) decreases. That is, due to the rectification effect provided by the step-shaped backflow prevention convex portion (6), backflow does not occur in the drainage device connected to the drainage introduction pipe (P), and the drainage smoothly flows along the drainage flow path. It is discharged to the sewage side from the discharge port (3).

In the present invention, there is no particular limitation on the method of attaching the drain device body (1) to the attachment port (W) of a waterproof pan or the like. That is, the drain device body (1)
FIG. 1 to FIG. 2 show the attachment of the waterproof pan and the attachment opening (W).
Flange member (11) as shown in the first embodiment
Alternatively, as shown in the embodiment of FIG. 7, the drain device main body (1) and the flange member (11) are configured to be integrated, and a member called a lock nut member (12) is further provided. The present invention is not characterized by the method or structure of attaching the drain port (2) of the drain device and the attachment port (W) of a waterproof pan or the like.

[0028]

According to the present invention, the drainage device provided with the backflow prevention convex portion on the periphery of the introduction hole on the side of the drainage flow path or on a part or all of the vicinity of the periphery has the structure described above. It has excellent effects. i) In the drainage device according to the present invention, when the drainage is discharged from the drainage port, the flow of the drainage is controlled by the backflow prevention convex portion, so that the drainage that enters the introduction hole is significantly reduced as compared with the conventional drainage device. In addition, backflow can be substantially prevented from occurring in the drainage device connected to the drainage introduction pipe. ii) In the drainage device according to the present invention, when the backflow prevention convex portion is integrally provided in the drainage device main body or the distal end portion of the drainage introduction pipe, the number of members does not increase, and the cost increases due to an increase in members. It is not necessary, and the unit price increase is very small. ii
i) The drainage device according to the present invention has a simple structure that does not use a member such as a backflow prevention valve unlike a conventionally known drainage device that employs a backflow prevention valve or the like. Functions are not lost or degraded due to failure.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a perspective view of the first embodiment of the present invention in a state where a half is cut out.

FIG. 3 is a sectional view of a second embodiment of the present invention.

FIG. 4 is a perspective view of a second embodiment of the present invention, with a half cut away.

FIG. 5 is a cross-sectional view of an embodiment of the present invention in which a backflow prevention wall is provided at a distal end of a drainage introduction pipe.

FIG. 6 is a cross-sectional view of an embodiment of the present invention in which the backflow prevention wall is formed by an independent member.

FIG. 7 is a sectional view of another embodiment in which the present invention is employed in a drainage device having a trap function.

FIG. 8 is a sectional view of still another embodiment in which the present invention is applied to a drainage device having a trap function.

FIG. 9 is a cross-sectional view of an embodiment of the present invention in which the backflow prevention convex portion has a stepped shape.

FIG. 10 is a perspective view of an embodiment of the present invention in which a backflow prevention convex portion has a stepped shape, with a half cut away.

FIG. 11 is a sectional view showing a conventional drainage device.

FIG. 12 is a perspective view of a conventional drainage device in a state where half of the drainage device is cut out.

FIG. 13 is a cross-sectional view showing a conventional drainage device having a trap function.

FIG. 14 is a perspective view of a conventional drainage device having a trap function, with a half cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage device main body 2 Drainage port 3 Drainage port 4 Introductory pipe connection part 5 Inlet hole 6 Backflow prevention convex part 6a Backflow prevention member 7 Water sealing room 7a Opening part 8 Outer wall part 9 Drainage channel 10 Deodorant cylinder 10a Top end of cylinder 11 Flange member 11a Opening 12 Lock nut member P Drainage introduction pipe W Inlet

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[Procedure amendment]

[Submission date] April 27, 1999 (1999.4.2
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a perspective view of the first embodiment of the present invention in a state where a half is cut out.

FIG. 3 is a sectional view of a second embodiment of the present invention.

FIG. 4 is a perspective view showing a member configuration of a second embodiment of the present invention in a state where a half is cut out.

FIG. 5 is a cross-sectional view of an embodiment of the present invention in which a backflow prevention wall is provided at a distal end of a drainage introduction pipe.

FIG. 6 is a cross-sectional view of an embodiment of the present invention in which the backflow prevention wall is formed by an independent member.

FIG. 7 is a sectional view of another embodiment in which the present invention is employed in a drainage device having a trap function.

FIG. 8 is a sectional view of still another embodiment in which the present invention is applied to a drainage device having a trap function.

FIG. 9 is a cross-sectional view of an embodiment of the present invention in which the backflow prevention convex portion has a stepped shape.

FIG. 10 is a perspective view of an embodiment of the present invention in which a backflow prevention convex portion has a stepped shape, with a half cut away.

FIG. 11 is a cross-sectional view showing an embodiment of the drain trap adopting the present invention, in which the backflow prevention convex portion has a stepped shape.

FIG. 12 is a perspective view showing a member configuration of a drain trap adopting the present invention in a state in which a backflow prevention convex portion has a stepped shape and is cut in half.

FIG. 13 is a sectional view showing a conventional drainage device.

FIG. 14 is a perspective view of a conventional drainage device in a state where half of the drainage device is cut out.

FIG. 15 is a cross-sectional view showing a conventional drainage device having a trap function.

FIG. 16 is a perspective view showing a member configuration in a state where a half of a conventional drainage device having a trapping function is cut off.

[Description of Signs] 1 Drainage device main body 2 Drain port 3 Drain port 4 Inlet pipe connection part 5 Inlet hole 6 Backflow prevention convex part 6a Backflow prevention member 7 Watertight chamber 7a Opening part 8 Outer wall part 9 Drainage channel 10 Deodorization cylinder 10a Upper end of cylinder 11 Flange member 11a Opening 12 Lock nut member P Drainage introduction pipe W Inlet

Claims (8)

[Claims] A drain unit (1) having a drain port (2) and a drain port (3) and a drain channel formed therein, and a drain unit body (1). An introduction pipe connecting portion (4) having an introduction hole (5) for connecting a drainage introduction pipe (P) for introducing drainage from another drainage device into the drainage flow path; 5) A drainage device comprising: a backflow prevention projection (6) provided on a part or all of the periphery or the vicinity of the periphery of 5). 2. The drainage device according to claim 1, wherein the backflow prevention projection (6) has a wall shape having an appropriate thickness. 3. The drainage device according to claim 1, wherein the backflow prevention projection (6) extends in a lateral direction to an adjacent plane and has a stepped shape. 4. The drainage device according to claim 1, wherein the backflow prevention protrusion (6) is provided integrally with the drainage device main body (1). A drainage device according to claim 1. 5. In the drainage device, the backflow prevention protrusion (6) is provided with a drainage device main body (1) and a drainage introduction pipe (P).
The drainage device according to any one of claims 1 to 3, wherein the drainage device is constituted by a backflow prevention member (6a) independent of the drainage member. 6. The drainage device according to claim 1, wherein the backflow prevention protrusion (6) is provided at a distal end of a drainage introduction pipe (P) for introducing drainage from another drainage device. Or the drainage device according to claim 2. 7. The drainage device according to claim 1, wherein the drainage device is provided with a trap function for preventing odors, pests, and the like from entering the drainage port (3) toward the drainage port (2). The drainage device according to any one of claims 1 to 6. 8. The drainage device according to claim 1, wherein the drainage device has an opening (7a) at an upper part and an introduction hole (5) at a side surface.
A watertight chamber (7) provided with an inlet pipe connection (4) having
A backflow prevention convex portion (6) protruding from the introduction hole (5) on the drainage channel side and a drainage channel (9) through which drainage overflows from the open portion (7a) of the watertight chamber (7) are formed. Outer wall (8), and a drain port (2) provided above the outer wall (8)
And a drain (3) provided at an arbitrary position on the outer wall (8) for discharging drain water, and a drain device main unit (1).
The upper and lower openings are opened, and the upper end portion (10a) of the cylinder is held in a watertight state with respect to the drain port (2) of the drain device body (1) during use, and the lower opening is further opened during use. A deodorizing cylinder (10) arranged in the watertight chamber (7) and having a lower opening at a higher position than the height of the bottom surface of the watertight chamber (7). The drainage device according to claim 7, wherein: