Catch basin for a drainage trap

Abstract

To provide a catch basin for a drain trap, which can simplify construction work by preventing the catch basin from being screwed into a mounting port when the catch basin is inserted into the mounting port while being inclined with respect to the axis of the mounting port of a housing of the drain trap.SOLUTION: A perforated plate receiver 50 for a drain trap 20 is screwed and attached to an attachment port 31 of a housing 30 of the drain trap. The perforated plate receiver has a body part 52 covered with the perforated plate 40 and having an inflow port 51 for allowing the inflow of the drain, a screw part 53 formed on the outer periphery of the body part and having a male screw 31a screwed into a female screw 53a formed on the inner periphery of the installing port, and an insertion guide part 54 extending in the opposite direction to the inflow port from an end part of the screw part. The insertion guide portion inhibits the screw portion from being screwed into the female screw when the main body portion is obliquely inclined with respect to the axis g of the mounting port and inserted into the mounting port.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a strainer holder for a drain trap. [Background technology]

[0002] A waterproof pan is commonly used to place a washing machine inside a house, etc. (See, for example, Patent Document 1). A waterproof pan for a washing machine has a mounting hole formed in its bottom, into which a drain trap is attached. As is well known, a drain trap has a housing that supports the trap components (a bowl and a water seal tube) and a strainer holder that attaches the housing to the mounting hole of the waterproof pan and holds the strainer. The bowl stores wastewater and allows it to overflow and flow into the drain pipe. The water seal tube is immersed in a portion of the wastewater in the bowl, separating the drain pipe side from the room inside. The trap components (a bowl and a water seal tube) are supported while housed inside the housing. The strainer has a discharge hole that discharges wastewater and other wastewater accumulated at the bottom of the waterproof pan into the water seal tube and a hose joint to which the washing machine's drain hose is connected. The strainer holder is attached by screwing it into the mounting hole of the drain trap housing. A male thread is formed on the outer periphery of the strainer holder, and a female thread is formed on the inner periphery of the mounting opening into which the male thread of the strainer holder is screwed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-88630 Summary of the Invention [Problem to be solved by the invention]

[0004] If the strainer holder is inserted into the mounting hole at an angle relative to the axis of the mounting hole, a so-called slanted insertion can occur. In other words, when the strainer holder is inserted at an angle into the mounting hole, the threads on the strainer's male thread interfere with the threads adjacent to the threads on the mounting hole's female thread that it should be mating with. If the strainer holder is screwed in further when this occurs, it will not be properly tightened into the mounting hole. This can lead to problems such as water leaks from the waterproof pan mounting hole.

[0005] Therefore, if the strainer tray is inserted at an angle into the mounting hole, it is necessary to correct the orientation of the strainer tray relative to the mounting hole and perform the screw-in work again, which results in complicated installation work.

[0006] Therefore, the present invention aims to provide a strainer holder for a drain trap that prevents the strainer holder from being screwed into the mounting opening when the strainer holder is inserted into the mounting opening at an angle relative to the axis of the mounting opening of the drain trap housing, thereby simplifying the installation work. [Means for solving the problem]

[0007] To achieve the above object, the present invention provides a strainer holder for a drain trap that is threaded into a mounting opening in a drain trap housing. The strainer holder includes a main body portion having an inlet through which wastewater flows and over which a strainer is placed, a threaded portion formed on the outer periphery of the main body portion and having a male thread that screws into a female thread formed on the inner periphery of the mounting opening, and an insertion guide portion extending from the end of the threaded portion in a direction opposite to the inlet. The insertion guide portion prevents the threaded portion from being threaded into the female thread when the main body portion is inserted into the mounting opening at an angle relative to the axis of the mounting opening. [Effects of the Invention]

[0008] According to the present invention, when the main body of the strainer tray holder is inserted into the mounting hole at an angle relative to the axis of the mounting hole of the drain trap housing, the insertion guide portion can prevent the main body from being screwed into the mounting hole. This eliminates the need to repeatedly screw the strainer tray holder into the mounting hole, simplifying the installation work. [Brief explanation of the drawings]

[0009] [Figure 1] This is an oblique view showing the state in which a washing machine is installed in a waterproof pan for a washing machine. [Figure 2] A cross-sectional view showing the drain trap housing and strainer receiver attached to the bottom of the waterproof pan. [Figure 3] A cross-sectional view showing the drain trap housing and strainer holder separated. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] 4 is an enlarged cross-sectional view of a portion A surrounded by a two-dot chain line in FIG. 3. FIG. [Figure 7] This is a cross-sectional view showing a state in which the strainer holder is prevented from being screwed into the mounting opening when it is inserted at an angle into the mounting opening of the drain trap housing. [Figure 8] This is a cross-sectional view used to explain the length that the insertion guide portion of the strainer holder extends from the end of the threaded portion. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments shown here are merely examples for embodying the technical concept of the present invention and are not intended to limit the present invention. Therefore, all other embodiments, examples, and operational techniques that can be conceived by those skilled in the art without departing from the spirit of the present invention are included in the scope and spirit of the present invention, as well as in the scope of the inventions set forth in the claims and their equivalents.

[0011] In addition, for the convenience of illustration and ease of understanding, the drawings attached to this specification may be represented schematically with the scale, aspect ratio, shape, etc. appropriately changed from the actual product, but these are merely examples and do not limit the interpretation of the present invention.

[0012] <Embodiment> As shown in Fig. 1, a waterproof pan 10 can be used, for example, to raise and place a washing machine 100 inside a house, etc. The waterproof pan 10 has a bottom 11, a plurality of mounting portions 12 that protrude vertically from the bottom 11 and on which the washing machine 100 is placed, and a plurality of side wall portions 13 that are arranged to surround the periphery of the bottom 11. A drain trap 20 is attached to the bottom 11 of the waterproof pan 10. A strainer 40 of the drain trap 20 has a discharge hole 41 that discharges wastewater and the like that has accumulated in the bottom 11 of the waterproof pan 10, and a hose joint 42 to which a drain hose of the washing machine 100 is connected.

[0013] As shown in FIG. 2, the drain trap 20 is attached to a mounting hole 14 formed in the bottom 11 of the waterproof pan 10. As is well known, the drain trap 20 has a housing 30 that supports the trap components (bowl and water seal cylinder), and a strainer holder 50 that attaches the housing 30 to the mounting hole 14 of the waterproof pan 10 and holds the strainer 40. The strainer holder 50 is attached by screwing it into the mounting opening 31 of the housing 30 of the drain trap 20. The trap components of the drain trap 20 (bowl and water seal cylinder) are not shown in FIG. 2. A U-shaped gasket 60 seals the space between the housing 30 and the strainer holder 50. The U-shaped gasket 60 is attached to the stepped portion 15 of the mounting hole 14 of the waterproof pan 10.

[0014] As shown in Figures 3 to 6, strainer receiver 50 has a main body 52 that is covered with strainer 40 and has an inlet 51 through which wastewater flows in, and a threaded portion 53 formed on the outer periphery of main body 52. ​​Threaded portion 53 has a male thread 53a that screws into female thread 31a formed on the inner periphery of mounting port 31. Strainer receiver 50 further has an insertion guide portion 54 that extends from the end of threaded portion 53 in the direction opposite to inlet 51.

[0015] The insertion guide portion 54 has a tip portion 55 located on the front side in the insertion direction into the attachment opening 31. The insertion guide portion 54 has a ring shape with an outer diameter dimension that does not exceed the root diameter of the male thread 53a.

[0016] As shown in FIG. 7 , when the main body 52 is inserted into the mounting opening 31 at an angle with respect to the axis g of the mounting opening 31, the insertion guide 54 prevents the threaded portion 53 from being threaded into the internal thread 31a. Specifically, the tip 55 of the insertion guide 54 hits the internal thread 31a, preventing the threaded portion 53 from being threaded into the internal thread 31a. Therefore, even when the strainer tray holder 50 is inserted into the mounting opening 31 at an angle, so-called "slanted insertion" does not occur. In other words, the threads of the external thread 53a of the threaded portion 53 do not interfere with the threads of the internal thread 31a of the mounting opening 31 that they should be mating with. Therefore, the operator does not need to pay excessive attention to the orientation of the strainer tray holder 50, such as inserting it straight along the axis g of the mounting opening 31. If the insertion guide portion 54 can be inserted into the mounting opening 31 while slightly moving the main body portion 52, it is guaranteed that the strainer holder 50 will be held in the correct position relative to the mounting opening 31. The worker can then screw in the strainer holder 50, installing it straight and correctly into the mounting opening 31 of the housing 30 in just one operation. This eliminates the need to repeatedly screw the strainer holder 50 into the mounting opening 31, simplifying the installation process.

[0017] Next, the length by which the insertion guide portion 54 extends from the end of the threaded portion 53 will be described.

[0018] 3, the length a of the insertion guide portion 54 varies depending on the outer diameter b of the male thread 53a of the strainer holder 50 (= the root diameter of the female thread 31a of the mounting opening 31), the depth c from the upper edge of the mounting opening 31 to the position where the female thread 31a is formed, etc. However, it is preferable that the length a of the insertion guide portion 54 extending from the end of the thread portion 53 is at least longer than the length L described below.

[0019] As shown in Figure 8, the length L is defined as the first pitch of the male thread 53a located on the front side in the insertion direction into the mounting opening 31 meshed with the female thread 31a when viewed in a cross section including the axis g of the mounting opening 31 of the drain trap 20 (shown on the left side in Figure 8). At this time, the length L is the length from the end of the threaded portion 53 to the point where it comes into contact with the female thread 31a on the opposite side of the axis g (the right side in Figure 8). By setting the length a that the insertion guide portion 54 extends from the end of the threaded portion 53 to be at least longer than the length L, when the main body portion 52 is inserted obliquely into the mounting opening 31, the insertion guide portion 54 can prevent the threaded portion 53 from being screwed into the female thread 31a.

[0020] As described above, the strainer holder 50 for the drain trap 20 of this embodiment includes a main body 52 having an inlet 51 through which the strainer 40 is placed and through which wastewater flows in; a threaded portion 53 formed on the outer periphery of the main body 52 and having a male thread 53a that screws into a female thread 31a formed on the inner periphery of the mounting opening 31; and an insertion guide portion 54 extending from the end of the threaded portion 53 in the direction opposite the inlet 51. The insertion guide portion 54 prevents the threaded portion 53 from screwing into the female thread 31a when the main body 52 is inserted into the mounting opening 31 at an angle with respect to the axis g of the mounting opening 31. With the strainer holder 50 for the drain trap 20 configured in this manner, if the insertion guide portion 54 can be inserted into the mounting opening 31 while slightly moving the main body 52, the strainer holder 50 is guaranteed to be positioned correctly relative to the mounting opening 31. The strainer holder 50 can then be screwed in, allowing it to be properly attached to the mounting opening 31 of the housing 30 in a single operation. This eliminates the need to repeatedly screw the strainer receiver 50 into the mounting port 31, simplifying the installation process.

[0021] The insertion guide portion 54 has a tip portion 55 located on the front side in the insertion direction into the mounting opening 31, and when the tip portion 55 of the insertion guide portion 54 hits the female thread 31a, the threaded portion 53 is prevented from being screwed into the female thread 31a. With this configuration, the threaded portion 53 can be easily prevented from being screwed into the female thread 31a.

[0022] It is preferable that the length a of the insertion guide portion 54 extending from the end of the threaded portion 53 is at least longer than the above-mentioned length L. With this configuration, when the main body portion 52 is inserted obliquely into the mounting opening 31, the insertion guide portion 54 can prevent the threaded portion 53 from being screwed into the female thread 31a.

[0023] The insertion guide portion 54 preferably has a ring shape with an outer diameter that does not exceed the root diameter of the male thread 53 a. By configuring it in this way, the ring-shaped insertion guide portion 54 can prevent the threaded portion 53 from being screwed into the female thread 31 a, regardless of the direction in which the main body portion 52 is tilted.

[0024] Although the embodiments of the present invention have been described, the present invention is not limited to the configurations described in the embodiments, and can be modified as appropriate based on the claims.

[0025] In addition, the following embodiments are also included within the scope of the present invention: a strainer holder 50 for a drain trap 20 as described in claim 2 having the features of claim 3; a strainer holder 50 for a drain trap 20 as described in claim 2 or 3 having the features of claim 4. [Explanation of symbols]

[0026] 10 Waterproof pants 14 Mounting holes 20 Drain Trap 30 Case 31 Mounting port 31a Female thread 40 perforated plate 41 Discharge hole 42 Hose joint 50 plate holder 51 Inlet 52 Main body 53 Threaded section 53a Male thread 54 Insertion guide 55 Tip 100 washing machines

Claims

1. In a strainer holder that is screwed into the mounting hole of the drain trap housing, a main body portion covered with a strainer and having an inlet through which wastewater flows; a threaded portion formed on the outer periphery of the main body portion and having a male thread that is screwed into a female thread formed on the inner periphery of the mounting port; an insertion guide portion extending from an end of the threaded portion in a direction opposite to the inlet, The insertion guide portion prevents the threaded portion from being screwed into the female thread when the main body portion is inserted into the mounting port at an angle with respect to the axis of the mounting port.

2. the insertion guide portion has a tip portion located on the front side in the insertion direction into the attachment opening, 2. The strainer holder for a drain trap according to claim 1, wherein the tip of the insertion guide portion collides with the female thread, thereby preventing the threaded portion from being screwed into the female thread.

3. The length of the insertion guide portion extending from the end of the threaded portion is A strainer holder for a drain trap as described in claim 1, which, when viewed in a cross section including the axis of the mounting port of the drain trap, is at least longer than the length (L) from the end of the threaded portion on the opposite side of the axis to contact with the female thread when the first pitch of the male thread located on the front side in the insertion direction into the mounting port is engaged with the female thread.

4. The strainer holder for a drain trap according to claim 1 , wherein the insertion guide portion has a ring shape with an outer diameter dimension that does not exceed the root diameter of the male thread.

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