JP7084119B2 - Cleaning port fitting - Google Patents

Description

The present invention relates to a cleaning port joint incorporated in a part of a drain pipe.

The cleaning port joint incorporated in a part of the drain pipe includes a joint body formed in a cylindrical shape and having a cleaning port portion, and a lid body is detachably attached to the cleaning port portion via an annular sealing member. Here, in order to easily attach / detach the lid to / from the cleaning port, the adoption of a bayonet-type lid that can be attached and positioned by inserting the lid into the cleaning port and twisting the lid is widespread.

Patent Document 1 discloses an example of a cleaning port joint provided with a bayonet type lid. In this cleaning port joint, a plurality of substantially L-shaped engaging grooves are provided on the inner peripheral surface of the cleaning port portion, and a plurality of engaging protrusions are provided on the outer peripheral surface of the lid. When attaching the lid to the cleaning port, align the engagement groove and the engaging protrusion, insert the lid into the cleaning port, and rotate the lid around the axis of the cleaning port by a predetermined angle. The lid is fixed with. Here, in this cleaning port joint, a receiving surface is provided on the inner peripheral surface of the cleaning port portion, and a step portion is provided on the outer peripheral surface of the lid body. When the lid is attached to the cleaning port, the seal member is sandwiched between the receiving surface of the cleaning port and the stepped portion of the lid and compressed in the axial direction of the cleaning port. Water stoppage between the cleaning port and the lid is ensured.

Japanese Unexamined Patent Publication No. 2015-2000405

By the way, drainage pipes in buildings such as condominiums are regularly cleaned (cleaned) using a high-pressure washer in order to remove deposits and clogging in the drainage pipes. Here, in the cleaning port joint provided with the bayonet type lid, the high-pressure cleaning water sprayed from the cleaning nozzle of the high-pressure washer passes through the gap between the inner peripheral surface of the cleaning port and the outer peripheral surface of the lid. Since the structure is such that it directly hits the seal member, high-pressure cleaning water may get over the seal member and leak from the cleaning port during high-pressure cleaning.

An object of the present invention is to provide a cleaning port joint that enhances the water blocking performance of a lid attached to the cleaning port and prevents water from leaking from the cleaning port during high-pressure cleaning.

The cleaning port joint of the present invention includes a joint body that is formed in a cylindrical shape and has a cleaning port portion, a lid that is attached to the cleaning port portion by a bayonet method, an inner peripheral surface of the cleaning port portion, and the lid. A cleaning port joint including an annular sealing member provided between the outer peripheral surface of the insertion portion to be inserted into the cleaning port portion of the body, wherein the cleaning port portion is located at a central end portion of the joint body. The lid has a formed circumferential step, the lid has an elastic flange formed on the outer periphery of the central end of the joint body of the insertion portion, and the elastic flange has an elastic flange. It is characterized in that it is located on the center side of the joint body of the step portion.

Further, the cleaning port joint of the present invention is characterized in that the elastic flange portion is formed of a rubber plate.

Further, the cleaning port joint of the present invention includes a joint body that is formed in a cylindrical shape and has a cleaning port portion, a lid that is attached to the cleaning port portion by a bayonet method, an inner peripheral surface of the cleaning port portion, and the above. A cleaning port joint provided with an annular first seal member provided between the outer peripheral surface of the insertion portion to be inserted into the cleaning port portion of the lid, and the center side of the joint body with respect to the first seal member. At the position of, the annular second seal member provided between the inner peripheral surface of the cleaning port portion and the outer peripheral surface of the insertion portion is provided.

Further, the cleaning port joint of the present invention is characterized in that the outer peripheral surface of the insertion portion does not project toward the inner peripheral surface side of the cleaning port portion at a position closer to the center of the joint body than the first seal member. do.

According to the present invention, it is possible to provide a cleaning port joint that enhances the water blocking performance of the lid body attached to the cleaning port portion and prevents water from leaking from the cleaning port portion during high-pressure cleaning.

It is a perspective view of the cleaning port joint which concerns on 1st Embodiment. It is a vertical sectional view of the cleaning port joint which concerns on 1st Embodiment. It is an enlarged view of a part of the vertical sectional view of the cleaning port joint which concerns on 1st Embodiment. It is a vertical sectional view of the cleaning port joint which concerns on 2nd Embodiment.

Hereinafter, the cleaning port joint according to the embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of the cleaning port joint according to the first embodiment, FIG. 2 is a vertical sectional view of the cleaning port joint, and FIG. 3 is an enlarged view of a part of the vertical sectional view of the cleaning port joint. Is. The cleaning port joint 10 is incorporated in a part of the drain pipe, and is a lid that is attached to the joint body 11 formed in a cylindrical shape and the cleaning port portion 13 formed in the joint body 11 by a bayonet method. An annular seal member (O-ring for water stoppage) provided between the body 20 and the inner peripheral surface of the cleaning port 13 and the outer peripheral surface of the insertion tube (insertion) 21 to be inserted into the cleaning port 13 of the lid 20. It is equipped with a ring) 30.

The joint main body 11 includes a main pipe member 12 and pipe connecting portions 12p and 12p to which pipes (not shown) provided at both ends of the main pipe member 12 and constituting a drainage pipe are connected. In this embodiment, the main pipe member 12 has a straight shape in which one pipe connecting portion 12p and the other pipe connecting portion 12p are linearly connected, but the main pipe member 12 is curved or bent. May be good.

The cleaning port portion 13 is formed in the main pipe member 12 so as to extend in a direction orthogonal to the axis L1 direction of the joint body 11 (axis L2 direction). An engaged portion 14 having an enlarged inner diameter of the pipeline of the cleaning port portion 13 is formed on the inner peripheral surface of the tip portion 13a on the side separated from the main pipe member 12 of the cleaning port portion 13. A plurality of engaging grooves 15 (three in the present embodiment) are formed in the engaged portion 14 at intervals in the circumferential direction of the cleaning port portion 13. Further, a receiving surface 16 orthogonal to the axis L2 direction is formed on the main pipe member 12 side of the engaged portion 14. Further, a circumferential step portion 17 is formed at the end portion of the cleaning port portion 13 on the main pipe member 12 side.

The engagement groove 15 includes an opening opened at the tip portion 13a of the cleaning port portion 13, an introduction groove extending from the opening portion parallel to the axis L2 direction of the cleaning port portion 13 toward the main pipe member 12, and an introduction groove. It is provided with a sliding groove extending from the end portion on the main pipe member 12 side along the circumferential direction of the main pipe member 12. The sliding groove is formed so as to be inclined so as to gradually approach the main pipe member 12 from the introduction groove side.

The lid 20 includes an insertion tube portion 21, an engaging portion 22, a flange portion 23, a closing plate 24, and an elastic flange portion 25. The insertion tube portion 21 has a cylindrical shape and has an outer diameter slightly smaller than the inner diameter of the conduit of the cleaning port portion 13. The engaging portion 22 has a cylindrical shape whose diameter is expanded toward the outer peripheral side of the insertion cylinder portion 21. On the outer peripheral surface of the engaging portion 22, the same number of engaging projections (not shown, three in the present embodiment) are formed at intervals in the circumferential direction. The engaging protrusion is formed so that the width of the engaging portion 22 along the circumferential direction is such that it can be inserted into the engaging groove 15. The engagement groove 15 formed in the engaged portion 14 of the cleaning port portion 13 and the engaging protrusion formed in the engaging portion 22 of the lid body 20 attach the lid body 20 to the cleaning port portion 13. Make up a bayonet.

The closing plate 24 is formed so as to be continuous with the inner peripheral surface of the main pipe member 12 when the lid 20 is attached to the cleaning port 13 and closed. The elastic flange portion 25 is formed of a rubber plate and is attached to the outer periphery of the end portion on the center side of the main pipe member 12 of the insertion cylinder portion 21. The elastic flange portion 25 is located on the center side of the main pipe member 12 of the step portion 17 when the lid 20 is attached to the cleaning port portion 13 and closed.

Inside the insertion tube portion 21 of the lid body 20, a knob portion 26 is provided for an operator to grasp when opening and closing the lid body 20. Further, the lid body 20 is provided with a tool engaging groove 27 at a position facing the insertion cylinder portion 21 of the flange portion 23 with the central axis thereof interposed therebetween.

In order to attach the lid 20 to the cleaning port portion 13 of the cleaning port joint 10, a sealing member 30 is interposed between the receiving surface 16 of the cleaning port portion 13 and the surface of the engaging portion 22 on the main pipe member 12 side. In this state, the engaging protrusion formed on the lid 20 is aligned with the position of the engaging groove 15, the insertion tube portion 21 is pushed into the cleaning port portion 13, and the engaging portion 22 is inserted into the engaged portion 14 of the cleaning port portion 13. Engage in. In this case, the outer diameter of the elastic flange portion 25 is larger than the inner diameter of the pipe line of the cleaning port portion 13, but the elastic flange portion 25 is flexed by pushing the insertion tube portion 21 of the lid 20 into the cleaning port portion 13. Then, it passes through the pipeline of the cleaning port 13 and moves to the center side of the main pipe member 12 of the step 17.

Then, the operator grips the knob portion 26 and rotates the lid body 20 around the axis L2 of the cleaning port portion 13, so that the lid body 20 is attached to the cleaning port portion 13 by a bayonet method. In this case, the seal member 30 is sandwiched between the receiving surface 16 of the cleaning port 13 and the surface of the lid 20 engaging portion 22 on the main pipe member 12 side in the axial direction (axis L2 direction) of the cleaning port 13. By being compressed, water stoppage between the cleaning port portion 13 and the lid body 20 is ensured.

When the lid 20 is closed, the closing plate 24 of the lid 20 is configured to be continuous with the inner peripheral surface of the main pipe member 12 so as not to protrude into the main pipe member 12. As a result, it is possible to prevent sewage from accumulating at the portion of the lid 20 of the cleaning port joint 10 and causing a loss in the flow of drainage in the main pipe member 12.

To remove the lid 20 from the cleaning port 13, the operator grasps the knob portion 26, rotates the lid 20 in the direction opposite to the above, and pulls out the lid 20 from the cleaning port 13. The lid 20 is removed from the cleaning port 13.

When cleaning the drain pipe to which the cleaning port joint 10 is connected by a high pressure washer, a high pressure cleaning hose provided with a cleaning nozzle at the tip is inserted into the drain pipe. The cleaning nozzle is rotatable about an axis with respect to a high-pressure cleaning hose, for example, and injects high-pressure cleaning water having a source pressure of 15 to 30 MPa while rotating with respect to the inner surface of the drain pipe.

In the cleaning port joint 10, since the elastic flange portion 25 of the lid 20 is located on the center side of the main pipe member 12 of the step portion 17, the surface of the step portion 17 perpendicular to the axis L1 and the elastic flange portion 25 during high-pressure cleaning. The washing water that has passed between the outer edge portion is received by the surface parallel to the axis L1 of the step portion 17 and is decelerated, and passes through the gap between the inner peripheral surface of the cleaning port portion 13 and the outer peripheral surface of the lid 20. To reach the seal member 30.

That is, since the water pressure of the washing water reaching the seal member 30 is small, the washing water does not get over the seal member 30, and the water blocking performance between the inner surface of the cleaning port 13 and the outer peripheral surface of the lid 20. It is possible to prevent water leakage from the cleaning port portion 13. Therefore, even with the bayonet type lid 20, it is possible to prevent water leakage when cleaning the drain pipe using a high pressure washer.

Next, the cleaning port joint according to the second embodiment will be described. FIG. 4 is a vertical cross-sectional view of the cleaning port joint according to the second embodiment. The cleaning port joint 40 according to the second embodiment uses two sealing members for the waterproof structure of the lid 20 attached to the cleaning port portion 13 in the cleaning port joint 10 according to the first embodiment. It has the same configuration as the cleaning port joint 10 according to the first embodiment in other respects. Therefore, the cleaning port joint 40 according to the second embodiment has the same configuration as the cleaning port joint 10 according to the first embodiment, and is attached to the configuration of the cleaning port joint 10 according to the first embodiment. The description will be given with the same reference numerals as those given.

The cleaning port joint 40 includes a circumferential recess 28 in which the seal member (O-ring) 32 is arranged on the center side of the main pipe member 12 with respect to the seal member 30 on the outer peripheral surface of the insertion cylinder portion 21. Here, the outer peripheral surface of the insertion cylinder portion 21 does not project toward the inner peripheral surface side of the cleaning port portion 13 at a position closer to the center of the main pipe member 12 than the seal member 30.

In order to attach the lid 20 to the cleaning port portion 13 of the cleaning port joint 40, a sealing member 30 is interposed between the receiving surface 16 of the cleaning port portion 13 and the surface of the engaging portion 22 on the main pipe member 12 side. With the seal member 32 arranged in the recess 28, the engaging protrusion formed on the lid 20 is aligned with the position of the engaging groove 15. Then, the insertion tube portion 21 is inserted into the cleaning port portion 13, and the lid 20 is rotated around the axis L2 of the cleaning port 13, so that the lid 20 is attached to the cleaning port 13 by a bayonet method. ..

In this case, the seal member 30 is sandwiched between the receiving surface 16 of the cleaning port 13 and the surface of the engaging portion 22 of the lid 20 on the main pipe member 12 side, and is further compressed in the axial direction of the cleaning port 13. When the seal member 32 comes into contact with the inner peripheral surface of the cleaning port portion 13, the water blocking property between the cleaning port portion 13 and the lid 20 is ensured.

When cleaning the drain pipe to which the cleaning port joint 40 is connected by a high pressure washer, a high pressure cleaning hose provided with a cleaning nozzle at the tip is inserted into the drain pipe and high pressure cleaning water is applied to the inner surface of the drain pipe. Inject while rotating. When the cleaning water sprayed toward the gap between the outer peripheral surface of the insertion tube portion 21 and the inner peripheral surface of the cleaning port portion 13 passes between the sealing member 32 and the inner peripheral surface of the cleaning port portion 13. The decelerated washing water reaches the seal member 30 through the gap between the inner peripheral surface of the cleaning port 13 and the outer peripheral surface of the lid 20.

That is, since the water pressure of the washing water reaching the seal member 30 is small, the washing water does not get over the seal member 30, and the water blocking performance between the inner surface of the cleaning port 13 and the outer peripheral surface of the lid 20. It is possible to prevent water leakage from the cleaning port portion 13. Therefore, even with the bayonet type lid 20, it is possible to prevent water leakage when cleaning the drain pipe using a high pressure washer.

In the second embodiment, the O-ring is used as the seal member 32, but an annular packing or an annular rubber plate may be used instead of the O-ring. Further, in the second embodiment, the circumferential recess 28 for arranging the seal member 32 on the center side of the main pipe member 12 with respect to the seal member 30 on the outer peripheral surface of the insertion cylinder portion 21 of the lid 20 is provided. However, a circumferential recess for arranging the seal member 32 may be provided on the center side of the main pipe member 12 with respect to the seal member 30 on the inner peripheral surface of the cleaning port portion 13.

10, 40 ... Cleaning port joint, 11 ... Joint body, 12 ... Main pipe member, 13 ... Cleaning port part, 14 ... Engaged part, 17 ... Step part, 20 ... Lid body, 21 ... Insert cylinder part, 22 ... Joint part, 23 ... Flange part, 24 ... Closing plate, 25 ... Elastic flange part, 30, 32 ... Seal member

Claims (1)

A joint body formed in a cylindrical shape and having a cleaning port portion, a lid body attached to the cleaning port portion by a bayonet method, and inserted into the inner peripheral surface of the cleaning port portion and the cleaning port portion of the lid body. A cleaning port joint incorporated in a part of a drain pipe in a building such as an apartment, which is provided with an annular first seal member provided between the outer peripheral surface of the insertion portion.
The joint body includes a main pipe member and pipe connection portions provided at both ends of the main pipe member.
The cleaning port portion has an opening into which the lid body is inserted and an engaging groove provided on the inner peripheral surface, and is formed so as to extend in a direction orthogonal to the axis of the main pipe member.
The lid body is provided with an engaging protrusion that engages with the engaging groove on the outer peripheral surface so as to be continuous with the inner peripheral surface of the main pipe member when the lid is attached to the cleaning port portion and closed. Equipped with a curved closing plate,
The first seal member is located closer to the center of the main pipe member than the engagement groove and the engagement protrusion.
An annular second seal member provided between the inner peripheral surface of the cleaning port portion and the outer peripheral surface of the insertion portion at a position closer to the center of the joint body than the first seal member is provided.
When viewed in cross section passing through the axis of the cleaning port and the axis of the main pipe member, the first seal member is arranged on the opening side of the cleaning port with respect to the outer peripheral surface of the pipe connecting portion.
When viewed in cross section passing through the axis of the cleaning port and the axis of the main pipe member, the second seal member is arranged on the center side of the main pipe member with respect to the outer peripheral surface of the pipe connection portion. Characterized cleaning port joint.

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