JP7306864B2 - Indirect drainage fitting - Google Patents

Description

TECHNICAL FIELD The present invention relates to an indirect drainage joint for indirectly draining drainage from an upstream side.

Conventionally, for example, an indirect drainage joint described in Patent Document 1 below is known.

This conventional indirect drainage joint consists of a joint body having an opening for discharging waste water (backflow water) from the downstream side when backflow occurs, and a side wall of the joint body covering the opening. and a detachably attached cover body.

Japanese Patent Application Laid-Open No. 2017-83112

However, in the above-described conventional indirect drainage joint, since the cover is detachable from the joint body, the cover may be lost due to mismanagement or mischief at the factory or construction site.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an indirect drainage joint capable of preventing loss of a cover body.

The indirect drainage joint according to claim 1 is an indirect drainage joint for indirectly discharging drainage from the upstream side, comprising a joint body having an opening for discharging the drainage from the downstream side when backflow occurs, and this joint A cover body is non-removably provided in the main body and partially closes the opening.

The indirect drainage joint according to claim 2 is the indirect drainage joint according to claim 1, wherein the cover body is switchable between a closed state in which the opening is partially closed and an open state in which the opening is opened. It is.

The indirect drainage joint according to claim 3 is the indirect drainage joint according to claim 1, wherein the cover body is rotated with respect to the joint body in a closed state in which the opening is partially closed and in an open state in which the opening is opened. can be switched to .

According to a fourth aspect of the present invention, there is provided an indirect drainage joint according to the third aspect, wherein the cover body has rotation restricting means for restricting rotation of the cover body with respect to the joint body in the closed state.

In the indirect drainage joint according to claim 5, in the indirect drainage joint according to claim 4, the rotation restricting means for the cover body is engaged with the one side portion of the opening to rotate the cover body in one direction. It has a one-way rotation restricting portion for restricting movement and a second-direction rotation restricting portion for restricting rotation of the cover body in the other direction by engagement with the other side portion of the opening. .

In the indirect drainage joint according to claim 6, in the indirect drainage joint according to claim 5, the one-way rotation restricting portion of the rotation restricting means of the cover body is a grip portion that can be gripped with fingers, and the cover. The other-direction rotation restricting portion of the rotation restricting means of the body is a restricting convex portion that can enter into the joint main body based on elastic deformation of the cover body.

The indirect drainage joint of claim 7 is the indirect drainage joint of claim 4, wherein the rotation restricting means for the cover body restricts the rotation of the cover body before the cover body is elastically deformed. and a regulating protrusion that allows the cover body to rotate in a state after the cover body is elastically deformed.

The indirect drainage joint according to claim 8 is the indirect drainage joint according to any one of claims 1 to 7, wherein the joint body has a water conveying portion for guiding wastewater from the upstream side, and the water conveying portion includes: At least one of a convex portion and a concave portion is formed through which drainage from the upstream side is transmitted.

The indirect drainage joint according to claim 9 is the indirect drainage joint according to any one of claims 1 to 8, wherein the joint body is connected to the upstream side body member connected to the upstream side member and the downstream side member, a downstream side body member having an opening for discharging wastewater from the downstream side member when backflow occurs, and the upstream side body member and the downstream side body member are combined so that the cover body is the upstream side body member. It is stored between the side body member and the downstream side body member in a non-removable state.

According to the present invention, loss of the cover body can be prevented.

1 is a front view of an indirect drainage joint (when the cover body is closed) according to one embodiment of the present invention; FIG. Fig. 10 is a front view of the same indirect drainage joint (when the cover body is open); Fig. 10 is a side view of the same indirect drainage joint (when the cover body is closed); FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1; FIG. 2 is a cross-sectional view taken along the line BB in FIG. 1; 3 is a cross-sectional view taken along line CC in FIG. 2; FIG. Fig. 3 is a perspective view of the same indirect drainage joint (when the cover body is closed); Fig. 3 is a perspective view of the same indirect drainage joint (when the cover body is open); It is an exploded perspective view of an indirect drainage joint same as the above. It is a front view of the cover body of an indirect drainage joint same as the above. It is a front view which shows the use condition of an indirect drainage joint same as the above.

An embodiment of the present invention will be described with reference to FIGS. 1 to 11. FIG.

In FIG. 11, 1 is a device with a latent heat recovery mechanism (for example, a latent heat recovery type gas water heater), and this device 1 discharges wastewater (drainage) generated inside based on the temperature difference between combustion and stop to the outside. It has an outlet part 2 for doing.

The upstream end of a connection pipe 3, which is an upstream member, is connected to the discharge port 2 of the device 1, and the upstream end of an indirect drainage joint 5 is connected to the downstream end of the connection pipe 3. The downstream end of the joint 5 is connected to the upstream end of a drain pipe 6 which is a downstream member.

In this way, the indirect drainage joint 5 installed in the middle of the drainage channel through which the drainage from the device 1 flows allows the drainage from the device 1 to be indirectly drained (the drainage from the upstream side) to be transferred to the downstream drainage pipe ( It is a pipe joint for indirectly draining water to the drain pipe) 6 and is connected between the connecting pipe 3 and the drain pipe 6 .

As shown in FIGS. 1 to 10, the indirect drainage joint 5 is designed to prevent backflow of wastewater due to clogging of the drainpipe 6 on the downstream side or backflow of wastewater from the main sewage pipe due to heavy rain or the like. A cylindrical (substantially cylindrical) shape having an opening 10 for opening to the atmosphere for discharging (removing to the outside) the drainage (backflow water) from the drain pipe 6 radially outward. and the joint body 11, and an opening for release to the atmosphere, which is provided in the joint body 11 so as not to be removable and rotatable with respect to the joint body 11, and which opens toward the side. A cover body 12 that is an elastically deformable screen body that partially closes the joint body 10 to prevent foreign matter (insects, dust, etc.) from entering the joint body 11 is provided.

The joint body 11 includes a cylindrical upstream body member (inner cylinder) 16 connected to the upstream connecting pipe 3 and a cylindrical downstream body member (outer cylinder) connected to the downstream drain pipe 6. It consists of 17 That is, the joint main body 11 is composed only of two cylindrical members 16 and 17 which are combined with each other, as is clear from FIG.

By combining and integrating the upstream main body member 16 and the downstream main member 17, the cover body 12 is positioned between the outer peripheral side of the upstream main member 16 and the inner peripheral side of the downstream main member 17. , it is stored in a non-removable and rotatable state.

First, the downstream side main body member 17 has a cylindrical main body portion 21 which is elongated in the vertical direction and has a cylindrical shape with both ends open. A circular annular projection 22 is projected from the lower portion of the inner peripheral surface of the cylindrical body portion 21 . A portion of the cylindrical main body 21 located below the annular projection 22 serves as a pipe connection port (outflow portion) 23 on the downstream side. The upstream end of the drain pipe 6 on the downstream side is connected to the pipe connection port 23 .

In addition, the cylindrical main body 21 is formed with an opening 10 which is elongated in the vertical direction and has a rectangular shape when viewed from the front. In other words, the tubular main body 21 has an opening that is a main body opening for releasing the internal space 25 in the tubular main body 21 to the atmosphere (outside air) outside the tubular main body 21. It has a portion (window portion) 10 . Furthermore, rectangular fitting holes 26 are formed on both left and right sides of the upper end portion of the cylindrical body portion 21 .

The upstream main body member 16 includes a cylindrical upstream pipe connection port (inflow portion) 31 to which the downstream end of the upstream connection pipe 3 is threadedly connected, and from the lower end of the pipe connection port 31 It has a cylindrical water guide portion 32 that protrudes downward and guides the wastewater from the upstream side downward at a position within the downstream side main body member 17 . A thread groove 30 is formed on the inner peripheral surface of the tube connection port portion 31 .

Further, the upstream main body member 16 includes a short cylindrical portion 33 that protrudes downward from the lower end portion of the pipe connection port portion 31 and covers the outer peripheral surface of the upper end portion of the water guide portion 32, and the outer peripheral surface of the short cylindrical portion 33. It has fitting protrusions 34 protruding on both left and right sides. The short cylindrical portion 33 has a diameter larger than that of the water guide portion 32 located inside, and is formed in a cylindrical shape that can be fitted into the inner peripheral side of the upper end portion of the cylindrical body portion 21 .

Then, the short cylindrical portion 33 of the upstream side main body member 16 is fitted into the inner peripheral side of the upper end portion of the cylindrical main body portion 21 of the downstream side main body member 17, and both the fitting projections 34 and the both fitting holes 26 are fitted. By fitting together, the upstream side body member 16 and the downstream side body member 17 are combined with each other and become inseparable. Therefore, the cover body 12 inside the joint main body 11 cannot be taken out of the joint main body 11 after the two main body members 16 and 17 are combined and integrated.

Here, the water guide section 32 has an outflow port (facing opening) 40 facing the opening 10 of the downstream side main body member 17 with a predetermined distance therebetween. The outflow port 40 includes an inclined opening 41 having a substantially triangular shape in front view, a slit-like vertical opening 42 extending vertically upward from the upper end of the inclined opening 41, and an approximately half opening extending obliquely downward from the lower end of the inclined opening 41 in plan view. It is configured with a circular lower end opening 43 .

The slanted slanted opening 41 is slanted at a predetermined slant angle α with respect to the vertical direction when viewed from the side (see FIG. 4). The predetermined inclination angle α is, for example, 5° to 15°, preferably 11°. The slanted slanted opening 41 faces the opening 10 with a gap therebetween.

The slit-shaped vertical opening 42 faces the opening 10 with a gap only at its lower part. In other words, the lower end of the vertical opening 42 is located below the upper end 10a of the opening 10, but the upper end of the vertical opening 42 extends to the lower end face 31a of the pipe connection port 31. Therefore, it is located above the upper end 10a of the opening 10. As shown in FIG. Therefore, the upper portion of the vertical opening 42 is covered with the tubular main body portion 21 .

In addition, the water guide section 32 has at least one of a convex portion and a concave portion, for example, a convex portion 46 for preventing splashing of waste water from the upstream side. The convex portion 46 extends axially in a straight line from the upper end to the vicinity of the lower end of the water conveying portion 32 on the rear portion of the inner peripheral surface of the water conveying portion 32, which is the portion opposite to the opening 10 side. For example, one line is formed. The cross-sectional shape of this convex portion 46 is, for example, a semicircular shape.

In the illustrated example, only the convex portion 46 is shown, but the present invention is not limited to this. and may be singular or plural.

The cover body (screen body) 12 is positioned at a predetermined height in the downstream side body member 17 of the joint body 11 so that the lower end surface 33a of the short cylindrical portion 33 of the upstream side body member 16 and the annular protrusion of the downstream side body member 17 are positioned. It is housed in the joint main body 11 in such a state that it cannot be taken out from the joint body 11 while being sandwiched between the upper surface 22a of the joint body 22 and the upper surface 22a of the joint body 22.

In addition, the cover body 12 is housed at a predetermined height position in the downstream side body member 17 of the joint body 11, and is vertically attached to the downstream side body member 17 passing through the axial center of the downstream side body member 17 with respect to the downstream side body member 17. It is horizontally rotatable around the rotation center axis X of the direction. In other words, the cover body 12 is rotated about the rotation center axis X with respect to the joint body 11, so that the opening 10 of the joint body 11 is partially closed and the opening 10 is opened. It is selectively switchable. More specifically, the cover body 12 is brought into a closed state in which the opening 10 is partially closed by the rotation of the joint body 11 in one direction, which is the closing direction with respect to the downstream side body member 17, and the joint body 11 is closed. By rotating in the other direction (direction opposite to the one direction) that is the opening direction with respect to the downstream side main body member 17, the entire opening 10 (including substantially the entirety) is opened (fully opened).

The cover body 12 has an arc plate-shaped front screen portion (small opening portion) 51 that closely faces the opening 10 in the closed state, and a rear cover opening that closely faces the opening 10 in the open state. It has a portion (large open portion) 52 and an arc plate-shaped arc plate portion 53 connected to one side edge of the screen portion.

Further, the cover body 12 has a circular annular upper end annular portion 56 positioned at the upper end and a short cylindrical lower end tubular portion 57 positioned at the lower end. An annular projecting portion 58 having a semicircular cross-section is formed on the outer peripheral surface of the upper end annular portion 56 so as to be in sliding contact with the inner peripheral surface of the cylindrical body portion 21 of the downstream side body member 17 . Similarly, the outer peripheral surface of the lower end tubular portion 57 is formed with an annular projecting portion 59 having a semicircular cross-section that is in sliding contact with the inner peripheral surface of the tubular main body portion 21 of the downstream side main body member 17 . The opening amount of the opening 10 when the cover body 12 is open is larger than the opening amount of the opening 10 when the cover body 12 is closed.

The screen portion 51, which is a foreign matter entry prevention portion, includes a plurality of arc-shaped hole portions (slits) 61 arranged in the vertical direction, and an arc rod-shaped longitudinal portion positioned between the vertically adjacent hole portions 61. a portion 62; Each rod portion 62 is formed with a sloped surface 63 that slopes forward downward.

The width of each slit-shaped hole portion 61 elongated in the horizontal direction is large enough to prevent foreign matter such as insects from entering the joint body 11, and is, for example, about 1 mm to 2 mm. On the other hand, the cover opening 52 is formed larger than the opening 10 of the joint main body 11 so that the entire opening (main body opening) 10 of the joint main body 11 can be opened.

Further, the cover body 12 has a rotation restricting means 65 which is a locking means for restricting the rotation of the cover body 12 in both directions with respect to the joint body 11 in the closed state and maintaining (locking) the cover body 12 in the closed state. are doing.

The rotation restricting means 65 restricts the one-way rotation of the cover body 10 in the closed state, for example, by engaging (abutting) with the abutted portion 66 of one side portion of the opening 10 of the joint body 11. The engagement (abutment) between the knob portion 71, which is a convex one-way rotation restricting portion, and the abutted portion 67 on the other side of the opening portion 10 of the joint body 11 causes the cover body 10 to be closed. It is composed of a restricting convex portion 72 which is a convex other-direction rotation restricting portion that restricts rotation in the other direction.

The grip portion 71 is elongated in the vertical direction and can be gripped with fingers by an operator (worker) who rotates the cover body 12. , and at least a portion thereof is positioned within the opening 10 . In the illustrated example, the vertical length dimension of the knob portion 71 is slightly shorter than the vertical length dimension of the opening 10 of the joint body 11, but substantially equal to the vertical length dimension of the opening 10, for example. It can be dimension.

The restricting convex portion 72 can enter into the downstream side body member 17 of the joint body 11 based on the elastic deformation of the cover body 12 inward in the radial direction, and after entering the downstream side body member 17, the restricting convex portion 72 can enter into the downstream side body member 17. It has a triangular cross-section that is slidable along the inner peripheral surface of the downstream side main body member 17, and one of the plurality of bar portions 62 of the screen portion 51 (for example, positioned at the center in the vertical direction of the screen portion). The central rod portion 62 is integrally protruding radially outward from the end portion of the arc plate portion 53 side, and at least a portion thereof is located within the opening portion 10 .

The restricting convex portion 72 includes a flat surface to be pressed 73 smoothly continuous with the surface of the rod portion 62, and a flat surface located along the radial direction of the cover body 12 and in contact with the abutted portion 67 of the opening 10. and an arcuate tip surface 75 positioned between the pressed surface 73 and the contact surface 74 (see FIG. 5).

When the cover body 12 is rotated in the other direction (opening direction) in a state of being elastically deformed inward in the radial direction of the cover body 12 (during the opening operation), the distal end surface 75 of the restricting convex portion 72 moves toward the downstream side. It slides along the inner peripheral surface of the body member 17 in the circumferential direction. Therefore, the height of the restricting convex portion 72 is such that when the operator presses the pressed surface 73 to elastically deform the cover body 12 radially inward, the distal end surface 75 is positioned within the downstream side main body member 17. It is set to a size that allows entry into (enterable).

In this manner, the restricting convex portion 72 restricts the rotation of the cover body 12 in the opening direction before the cover body 12 is elastically deformed. In the state, it enters into the joint body 11 and slides to allow the rotation of the cover body 12 in the opening direction.

As is clear from FIG. 10, the cover body 12 has an elongated hole portion which guides water droplets downward and facilitates elastic deformation of the cover body 12 to reduce the pressing force of the operator. has 77.

The elongated hole portion 77 is formed in a portion of the arc plate portion 53 on the screen portion 51 side. Therefore, when the cover body 12 is closed, for example, when water droplets of drainage from the upstream side adhere to the inner surface of the cover body 12, the long hole portion 77 allows the water droplet to flow along the long hole portion 77. Water droplets are prevented from flowing out of the joint main body 11 through the hole portions 61 of the screen portion 51 by guiding the water droplets downward.

The indirect drainage joint 5 is composed of three members, for example, the upstream body member 16, the downstream body member 17, and the cover body (cover member) 12, as described above. The upstream body member 16 and the downstream body member 17 are made of synthetic resin such as PVC. The cover body 12 is made of a synthetic resin such as PP, and more preferably has light transmittance so that the inside of the downstream side main body member 17 can be seen through the opening 10 .

Next, the operation of the indirect drainage joint 5 and the like will be described.

During normal operation (when foreign matter is prevented from entering), the cover body 12 is set in a closed state as shown in FIG. 7 and the like.

Therefore, the opening 10 of the joint body 11 is partially closed by being covered with the screen portion 51 of the cover body 12 in the closed state. As a result, foreign matter such as insects are prevented from entering the joint body 11 through the opening 10 .

Forward water, which is drain water from the equipment 1 on the upstream side, is rectified and guided downward by the water guiding portion 32 and flows out from the outflow port 40. The water is indirectly drained to the drain pipe 6 on the downstream side through the inside of the pipe connection port 23 of the downstream side main body member 17 .

However, if backflow of waste water occurs due to clogging of the drain pipe 6 on the downstream side, etc., the backflow water from the downstream side will flow into the hole portion 61 of the screen portion 51 of the cover body 12 in the closed state and the downstream side main body member 17. It is discharged out of the joint body 11 through the opening 10 of the . Therefore, backflow water is prevented from flowing into the device 1 on the upstream side.

Here, for example, foreign matter smaller than the hole portion 61 of the screen portion 51 may enter and accumulate in the joint body 11. During maintenance to remove such foreign matter, the operator must move the cover body 12 radially inward. After elastically deforming in the direction, the cover body 12 is switched from the closed state to the open state by pinching the knob portion 71 and rotating the cover body 12 in the opening direction.

Then, as shown in FIG. 8 and the like, the opening 10 of the downstream side main body member 17 of the joint main body 11 is wide open sideways. As a result, the operator can remove the foreign matter accumulated in the joint main body 11 to the outside of the joint main body 11 through the cover opening 52 and the opening 10 which face each other closely and communicate with each other.

After the maintenance work is completed, the operator picks up the knob 71 and rotates the cover body 12 in the closing direction, thereby returning the cover body 12 to the original closed state.

Further, according to the indirect drainage joint 5, the cover body 12 is provided in the cylindrical joint main body 11 so that it cannot be taken out. The cover body 12 is not lost due to mischief or the like.

When the cover body 12 is rotated in one direction with respect to the cylindrical joint body 11, the cover body 12 is brought into a closed state in which the opening 10 is partially closed, and when it is rotated with respect to the joint body 11 in the other direction, the opening 10 is closed. Therefore, the opening 10 of the joint body 11 can be easily opened and closed only by rotating the cover body 12 .

Further, since the cover body 12 has the rotation restricting means 65 for restricting the rotation of the cover body 12 with respect to the joint body 11 in the closed state, it is possible to prevent the cover body 12 in the closed state from unintentionally rotating. For example, during transportation or construction, the cover body 12 does not turn open due to vibration, mischief, or the like.

The rotation restricting means 65 of the cover body 12 includes a knob portion 71 which is a one-way rotation restricting portion for restricting the rotation of the cover body 12 in one direction in the closed state, and a knob portion 71 which is a one-way rotation restriction portion for restricting the rotation of the cover body in the closed state in the other direction. Since the knob 71 and the restricting convex portion 72 are constituted by the restricting convex portion 72 which is the other direction rotation restricting portion that restricts the rotation to the opposite direction, the rotation of the cover body 12 in the closed state is appropriately prevented by the knob portion 71 and the restricting convex portion 72. Moreover, the cover body 12 can be easily rotated by using the knob portion 71.例文帳に追加

Furthermore, since the water conveying portion 32 of the upstream body member 16 of the joint main body 11 is formed with a scattering prevention projecting portion 46 to which the waste water from the upstream side is transmitted, the projecting portion 46 of the water conveying portion 32 prevents the waste water from the upstream side. It is possible to flow downward along the portion 46 and prevent splashing of waste water.

Further, since the circular arc plate portion 53 of the cover body 12 is formed with the elongated hole portion 77 that guides the water droplets of the wastewater from the upstream side downward, the wastewater is scattered by the elongated hole portion 77 of the cover body 12 as well. can be prevented.

In addition, the joint body 11 of the indirect drainage joint 5 is not limited to the configuration consisting of the upstream side body member 16 and the downstream side body member (outer cylinder) 17 which are separate from each other. It is also possible to configure

Further, the screen portion 51 of the cover body 12 is not limited to a bar structure having a plurality of bar portions 62, and may be, for example, a mesh structure that can prevent foreign matter from entering and can discharge backflow water. Any structure may be used.

Furthermore, the cover body 12 may be configured without, for example, the long hole portion 77 for preventing scattering, or may be configured to have at least one of projections and recesses for preventing scattering instead of the long hole portion 77. It's okay.

Also, the case where the indirect drainage joint 5 is connected to the discharge port 2 of the device 1 via the connection pipe 3 has been described, but for example, when the indirect drainage joint 5 is directly connected to the discharge port 2 via a joint or the like, There is also

Furthermore, the screen portion 51 of the cover body 12 is not limited to a structure in which the inside of the joint body 11 can be visually observed in a front view as shown in FIG. A configuration in which the inside of 11 is not directly visible may be used.

Further, the screen portion 51 of the cover body 12 may have a structure or the like in which meshes or pores are provided.

Furthermore, the shape of the restricting convex portion 72 is not limited to a triangular cross section, and can be changed to various shapes such as a rectangular shape and an arc shape.

3 Connection pipe as an upstream member 5 Indirect drainage joint 6 Drainage pipe as a downstream member
10 openings
11 Joint body
12 cover body
16 Upstream body member
17 Downstream body member
32 Conveyor
46 Convex part
65 Rotation restricting means
71 Knob part that is a one-way rotation restricting part
72 Restriction protrusion that is a rotation restriction part in the other direction

Claims (2)

An indirect drainage joint for indirectly draining drainage from an upstream side,
a joint body having an opening for discharging wastewater from the downstream side during reverse flow;
a cover body that partially closes the opening,
The joint body is
an upstream body member connected to the upstream member;
a downstream body member connected to the downstream member and having the opening for discharging waste water from the downstream member in the event of reverse flow;
By combining the upstream body member and the downstream body member, the cover body is accommodated between the upstream body member and the downstream body member ,
The cover body can be switched between a closed state in which the opening is partially closed and an open state in which the opening is opened by rotating with respect to the joint body.
An indirect drainage joint characterized by: The cover body has rotation restricting means for restricting rotation of the cover body with respect to the joint body in the closed state,
The rotation restricting means is
a one-way rotation restricting portion that restricts rotation of the cover body in one direction by engaging with one side portion of the opening;
2. The indirect drainage joint according to claim 1 , further comprising: a second direction rotation restricting portion that restricts rotation of the cover body in the other direction by engagement with the other side portion of the opening.

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