JP2015200405A - Lid body of cleaning hole joint, and cleaning hole joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid body of a cleaning hole joint capable of facilitating opening/closing operation with a general purpose tool while saving its space, and a cleaning hole joint using the lid body.SOLUTION: A lid body of a cleaning hole joint includes: an insertion cylindrical part that is inserted into a cleaning hole part 13 of a cleaning hole joint 10; an annular flange part 23 that is formed so as to extend radially outward from one end of the insertion cylindrical part; a plurality of engagement projections that are engaged to a plurality of engagement grooves formed in the cleaning hole part 13 by rotating them around the central axis of the insertion cylindrical part; and a pair of tool engagement grooves 40 that are formed on both sides across the center of the flange part 23, in the flange part 23.

Description

  The present invention relates to a lid for a cleaning port joint and a cleaning port joint.

  In order to inspect and clean the inside of the piping, a cleaning port joint having a cleaning port that can be opened and closed by a lid is used. The lid of such a cleaning port joint is provided with a protrusion or the like for opening and closing. When the lid is tight and cannot be opened by hand, the lid is also opened using a tool.

  Patent Document 1 discloses a configuration in which a convex portion is provided on the lid, and the lid can be opened and closed by applying a general-purpose tool such as a screwdriver or a monkey wrench to the convex portion.

  Further, Patent Document 2 discloses a lid having a bottomed cylindrical sealing portion. The lid is formed with a grip portion protruding from the bottom surface inside the sealing portion, and a jig hole for engaging a tool or the like with the grip portion.

Japanese Patent No. 4280103 Design Registration No. 1385425

  However, in the configuration disclosed in Patent Document 1, the convex portion protrudes from the lid. For this reason, it is necessary to secure a space around the cleaning port joint where the convex portion can rotate and a tool can be hung on the convex portion. Therefore, the pipe space for storing the piping tends to be reduced, and it is difficult to provide a space for the cleaning joint.

In the configuration disclosed in Patent Literature 2, since the gripping portion is formed in the bottomed cylindrical sealing portion, space saving can be achieved.
However, in order to open and close the lid with a tool, it is necessary to use a dedicated bar-shaped jig that can be inserted into a jig hole formed at the tip of the gripping part. In this case, it is expensive and inconvenient to prepare a dedicated jig.
Therefore, the present invention provides a cover for a cleaning port joint that can be easily opened and closed using a general-purpose tool while saving space, and a cleaning port joint using the same.

The present invention employs the following means in order to solve the above problems.
The lid of the cleaning port joint according to the present invention includes an insertion portion to be inserted into the cleaning port portion, an annular flange portion formed to extend radially outward from one end of the insertion portion, and the insertion portion. A plurality of engagement protrusions engaged with a plurality of engagement grooves formed in the cleaning port portion by rotating around a central axis, and the flange portion are formed on both sides sandwiching the center of the flange portion. And a pair of tool engaging grooves.
According to such a configuration, since the tool engaging groove is formed on both sides of the center of the flange portion, for example, by engaging a rod-shaped tool such as a shaft portion of a driver with the tool engaging groove. The lid can be rotated. Moreover, since the force by turning a tool is transmitted to the flange part which is the outermost peripheral part of a cover body, it becomes possible to rotate a cover body by light force.
And, it is only necessary to form a tool engagement groove with a depth that can engage a rod-shaped tool such as a driver's shaft in the lid, so that the projecting dimension from the flange is minimized. Can do.

Further, in the lid of the cleaning port joint according to the present invention, the tool engaging groove is a notch portion formed on a part of the flange portion in the circumferential direction on both sides sandwiching the center of the flange portion. It may be formed by a recess.
By comprising in this way, the protrusion dimension from the flange part of a cover body can be suppressed to the minimum.

In the lid of the cleaning port joint according to the present invention, the tool engaging groove rises from the flange portion at intervals in the circumferential direction of the flange portion on each of both sides sandwiching the center of the flange portion. A pair of rising walls may be provided.
In such a configuration, the lid can be rotated by engaging a tool between the pair of rising walls. The rising wall only needs to have a height sufficient to engage with a rod-shaped tool, and the protruding dimension from the flange portion of the lid can be minimized.

Further, a knob part formed in a flat cylindrical shape may be formed inside the flange part, and an inner space of the knob part may be a tool insertion part.
In such a configuration, it is possible to grip the knob and rotate the lid. It is also possible to rotate the lid by inserting the tool into the tool insertion portion and rotating the tool.

The cleaning port joint according to the present invention has a pipe connection part to which pipes are connected to both ends, a joint body provided with a cleaning port part formed between the pipe connection parts, and the joint body And a lid as described above that can be attached to the cleaning port.
According to such a cleaning port joint, the lid can be rotated by engaging the rod-shaped tool with the tool engaging groove. Further, the lid can be rotated with a light force. Moreover, since the lid can minimize the projecting dimension from the flange portion, the size of the cleaning joint can be reduced.

A through hole through which a string-like member can be inserted may be formed in the joint main body and the lid body of the cleaning joint according to the present invention.
According to such a cleaning port joint, the lid member and the joint body can be connected by inserting the string-like member through the through hole.

  According to the lid of the cleaning joint and the cleaning joint using the same according to the present invention, it is possible to save space by minimizing the projecting dimension from the flange portion of the lid. Further, the lid can be easily opened and closed by engaging a rod-shaped tool such as a driver shaft portion, that is, a general-purpose tool, with the tool engaging groove formed in the flange portion.

It is sectional drawing which shows the components structure of the cleaning-joint joint which concerns on this embodiment. It is a perspective view which shows the coupling main body of a cleaning mouth coupling. It is the figure which looked at the cleaning port joint from the cleaning port side. It is sectional drawing which shows the state which made the cover body oppose the cleaning port part of a coupling main body. It is a figure which shows the cover body which comprises a cleaning port joint, (a) is the perspective view seen from the side which turned to the outer side in the state which attached the cover body to the cleaning port joint, (b) is a cover body to a cleaning port joint. It is the perspective view seen from the side used as piping inner side in the mounted state. It is the figure seen from the side which becomes piping inner side in the state which mounted | wore the cleaning mouth joint with the cover body. It is sectional drawing which shows the state which inserted the cover body into the cleaning port part of the coupling main body. It is the perspective view which looked at the state which inserted the lid in the cleaning mouth part of a joint main part from the inside of a joint main part. It is sectional drawing which shows the closed state which attached the cover body to the cleaning port part of the coupling main body. It is the perspective view which looked at the closed state which attached the lid to the cleaning mouth part of a joint main part from the inside of a joint main part. It is the figure which looked at the closed state which mounted | wore the cleaning port part of the coupling main body from the cleaning port side. It is the perspective view which showed the cleaning-joint provided with the cover body of other embodiment of this invention. It is the perspective view which showed the use condition of the cleaning-mouth joint provided with the cover body of other embodiment of this invention. It is the figure which looked at the cleaning-joint of other embodiment of this invention from the side of the cleaning-mouth part. It is the figure which looked at the cleaning-joint of other embodiment of this invention from the cleaning-mouth part side.

  Hereinafter, with reference to an accompanying drawing, a form for carrying out a cover of a cleaning mouth joint by the present invention and a cleaning mouth joint using the same is explained. However, the present invention is not limited only to this embodiment.

FIG. 1 is a cross-sectional view showing a component configuration of a cleaning joint according to the present embodiment. FIG. 2 is a perspective view showing a joint body of the cleaning joint. FIG. 3 is a view of the cleaning port joint as viewed from the cleaning port side. FIG. 4 is a cross-sectional view showing a state in which the lid is opposed to the cleaning port of the joint body. FIG. 5 is a view showing a lid constituting the cleaning joint, wherein (a) is a perspective view seen from the side facing the outside in a state where the lid is attached to the cleaning joint, and (b) is a perspective view of the lid. It is the perspective view seen from the side which becomes piping inner side in the state with which the cleaning mouth joint was mounted | worn. FIG. 6 is a view as seen from the inner side of the pipe with the lid attached to the cleaning joint.
As shown in FIG. 1, the cleaning joint 10 is incorporated into a part of the drain pipe, and includes a joint body 11, a lid 20, and an annular packing 30.

As shown in FIGS. 1 to 4, the joint body 11 is integrally provided with a main pipe member 12 and a cleaning port portion 13.
The main pipe member 12 has a tubular shape and includes pipe connection portions 12p and 12p at both ends to which pipes (not shown) constituting a drain pipe are connected. In this embodiment, the main pipe member 12 has a straight shape in which one pipe connection portion 12p and the other pipe connection portion 12p are linearly arranged, but the main pipe member 12 may be curved or bent. Good.

  The cleaning port portion 13 has a cylindrical shape and is connected to the main pipe member 12 between the pipe connecting portions 12p and 12p. The cleaning port portion 13 is formed to extend toward the side perpendicular to the direction of the axis L1 of the main pipe member 12. A pipe line 13k formed inside the cleaning port portion 13 communicates with the main pipe line 12k in the main pipe member 12.

In the cleaning port portion 13, an engaged portion 14 having an inner diameter larger than that of the pipe line 13 k is formed on the inner peripheral surface of the distal end portion 13 s on the side away from the main pipe member 12. A plurality of engagement grooves 15 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 axial direction of the pipe line 13k is formed between the pipe line 13k of the cleaning port 13 and the engaged part 14.

  As shown in FIG. 4, each engagement groove 15 has an opening 15 a that opens at the distal end portion 13 s of the cleaning port portion 13, and the main tube member 12 side from the opening 15 a to the axis L <b> 2 direction of the cleaning port portion 13. An introduction groove 15b extending toward the end, a sliding groove 15c extending from the end of the introduction groove 15b on the main pipe member 12 side along the circumferential direction of the main pipe member 12, and a terminal fixing portion 15d formed at the end of the sliding groove 15c. And.

The sliding groove 15c is formed to be inclined so as to gradually approach the main pipe member 12 from the introduction groove 15b side toward the terminal fixing portion 15d.
The terminal fixing portion 15 d is formed so that the groove inner peripheral surface 15 f on the tip end portion 13 s side of the cleaning port portion 13 is orthogonal to the axial direction of the cleaning port portion 13.

In the present embodiment, three sets of the engagement grooves 15 are provided in the circumferential direction of the cleaning port portion 13.
Here, as shown in FIG. 3, one of the three sets of engagement grooves 15 has an opening 15 a in the direction along the circumferential direction of the cleaning port 13 and a width W 1 of the introduction groove 15 b. It is set to be larger than the width W2 of the opening 15a of the two engagement grooves 15 and the introduction groove 15b.

  As shown in FIGS. 4, 5, and 6, the lid 20 is integrally provided with an insertion tube portion 21, an engagement portion 22, a flange portion 23, and a closing plate 24.

  The insertion tube portion 21 has a cylindrical shape and has an outer diameter slightly smaller than the inner diameter of the pipe line 13 k of the cleaning port portion 13 and can be inserted into the cleaning port portion 13.

  The engagement portion 22 has a cylindrical shape whose diameter is expanded on the outer peripheral side of the insertion tube portion 21 on one end side of the insertion tube portion 21. The outer diameter of the engaging portion 22 is set to be larger than the inner diameter of the pipe line 13k of the cleaning port portion 13 and smaller than the inner diameter of the engaged portion 14. A step portion 25 is formed between the engagement portion 22 and the insertion tube portion 21 and is located in a plane orthogonal to the axis of the insertion tube portion 21.

  As shown in FIG. 6, the same number of engaging protrusions 27 as the engaging grooves 15 are formed on the outer peripheral surface of the engaging portion 22 at intervals in the circumferential direction. In this embodiment, three engagement protrusions 27 are provided. The engaging protrusion 27 is formed such that the width along the circumferential direction of the engaging portion 22 can be inserted into the engaging groove 15. The width W3 of one of the three engagement protrusions 27 is set to be larger than the width W4 of the other two engagement protrusions 27.

  As shown in FIGS. 4 and 5, the flange portion 23 is formed on the end portion of the engaging portion 22 opposite to the insertion tube portion 21 side, extending from the engaging portion 22 to the outer peripheral side. The flange portion 23 is set so that the outer diameter is larger than the inner diameter of the engaged portion 14.

  The closing plate 24 is provided to close the opening on the other end side of the insertion tube portion 21. The closing plate 24 is formed to be curved so as to be continuous with the inner peripheral surface of the main pipe line 12k of the main pipe member 12 when the lid 20 is attached to the cleaning port 13 and closed as described later. ing. Further, the end portion on the other end side of the insertion tube portion 21 is formed in a shape along the outer peripheral portion of the closing plate 24.

As shown in FIG. 5A, in the lid 20, a knob portion 26 is provided on the inner side of the insertion tube portion 21 so that an operator can grip the lid 20 when opening and closing the lid 20. The knob portion 26 projects from the closing plate 24 along the axial direction of the insertion tube portion 21 inside the insertion tube portion 21.
The knob portion 26 is formed so that the tip portion 26 s is positioned closer to the closing plate 24 than the flange portion 23. Thereby, the tool engaged with the tool engagement groove | channel 40 mentioned later does not interfere with the knob | pick part 26. FIG. Moreover, since the knob | pick part 26 is settled in the insertion cylinder part 21 of the cover body 20, and the insertion cylinder part 21 is settled in the cleaning port part 13 of the cleaning port joint 10, space saving can be carried out as the whole cleaning port joint 10. FIG.
In this embodiment, the knob part 26 is a pair of two, and is arranged along the diameter direction of the insertion cylinder part 21 on both sides of the center of the insertion cylinder part 21.

The lid 20 includes a tool engagement groove 40.
The tool engagement groove 40 is formed of a notch 41 and a rising wall 42 formed at positions facing each other across the central axis of the insertion cylinder portion 21 in the flange portion 23.

  The notch 41 is formed by notching a part of the flange portion 23 in the circumferential direction, is continuous in the diameter direction of the flange portion 23, and has a width that allows insertion of a general-purpose tool such as a driver shaft. By forming the notch 41, the distal end surface 21 s of the insertion tube portion 21 is exposed inside the notch 41.

Two rising walls 42 are provided in pairs along the circumferential direction of the flange portion 23 at intervals. The rising wall 42 is formed so as to rise from the flange portion 23 along both sides of the notch 41.
Here, the rising dimension of the rising wall 42 from the flange part 23 is such that the sum of the thickness of the flange part 23 and the rising dimension of the rising wall 42 is about ½ of the diameter of the shaft part of the driver expected to be used. It is preferable to set so that

  As shown in FIG. 4, in order to attach such a lid 20 to the cleaning port portion 13, the insertion tube portion 21 is placed with a packing 30 interposed between the lid 20 and the cleaning port portion 13. It inserts in the pipe line 13k of the coupling body 11, and engages the engaging part 22 with the engaged part 14 of the cleaning port part 13. In order to engage the engaging portion 22 with the engaged portion 14, each engaging protrusion 27 is inserted into the engaging groove 15. At this time, one of the engaging protrusions 27 and the opening 15a of the engaging groove 15 is formed wider than the other two, so that the lid 20 is predetermined with respect to the cleaning port portion 13. Inserted in the opposite direction. As a result, when the lid 20 is closed as will be described later, the closing plate 24 of the lid 20 is continuous with the inner peripheral surface of the main pipeline 12k of the main pipe member 12, and does not protrude into the main pipeline 12k. The lid 20 can be inserted into the lid.

FIG. 7 is a cross-sectional view showing a state in which the lid is inserted into the cleaning port portion 13 of the joint body 11. FIG. 8 is a perspective view of the state in which the lid 20 is inserted into the cleaning port 13 of the joint body 11 as viewed from the inside of the joint body 11.
As shown in FIGS. 7 and 8, when the lid 20 is pushed into the cleaning port 13 as it is, the engagement protrusion 27 moves along the introduction groove 15 b of the engagement groove 15 and hits the end of the introduction groove 15 b. Therefore, the movement of the lid 20 is regulated.
In a state where the lid 20 is pushed into the insertion port 13 and inserted, the distal end 21t of the insertion cylinder 21 and the closing plate 24 of the lid 20 protrude into the main conduit 12k.

Next, the lid 20 is rotated around the central axis L <b> 2 of the cleaning port 13. Then, the engaging protrusion 27 shown in FIG. 4 slides toward the terminal fixing portion 15d along the sliding groove 15c of the engaging groove 15 shown in FIG. As shown in FIG. 4, the sliding groove 15c is inclined so as to gradually approach the main pipe member 12 from the introduction groove 15b side toward the terminal fixing part 15d. The cover 20 is displaced to the main pipe member 12 side as it goes to.
At this time, as shown in FIG. 7, the packing 30 is sandwiched between the step portion 25 of the lid body 20 and the receiving surface 16 of the cleaning port portion 13, and the lid body 20 is displaced to the main pipe member 12 side. It is gradually crushed as you do.

FIG. 9 is a cross-sectional view showing a closed state in which the lid 20 is attached to the cleaning port portion 13 of the joint body 11. FIG. 10 is a perspective view of the closed state in which the lid 20 is attached to the cleaning port 13 of the joint body 11 as viewed from the inside of the joint body 11. FIG. 11 is a view of the closed state in which the lid 20 is attached to the cleaning port portion 13 of the joint body 11 as viewed from the cleaning port portion 13 side.
When the lid 20 is further rotated and the engagement protrusion 27 shown in FIG. 1 reaches the terminal fixing portion 15d of the engagement groove 15, further rotation of the lid 20 is restricted. Thereby, the cover body 20 will be in a closed state.

As shown in FIG. 9, in this closed state, the packing 30 has a predetermined compression rate that can exhibit a reliable water stop between the step portion 25 of the lid 20 and the receiving surface 16 of the cleaning port portion 13. The cleaning port 13 is compressed in the axial direction.
Further, in this closed state, the engagement protrusion 27 is formed on the groove inner peripheral surface 15 f side on the tip end portion 13 s side of the cleaning port portion 13 in the terminal fixing portion 15 d of the engagement groove 15 by the reaction force of the compressed packing 30. Is pressed. The groove inner peripheral surface 15 f is not inclined like the sliding groove 15 c and is formed so as to be orthogonal to the direction of the axis L 2 of the cleaning port 13. The lid 20 can be prevented from being loosened by being displaced toward the sliding groove 15c.

  When the lid 20 is closed as shown in FIGS. 9 and 10, the closing plate 24 of the lid 20 is continuous with the inner peripheral surface of the main pipe 12k of the main pipe member 12, and protrudes into the main pipe 12k. It is supposed not to. Thereby, in the part of the cover body 20 of the cleaning port joint 10, it can suppress that sewage accumulates or giving a loss to the flow of the waste_water | drain in the main pipe line 12k.

In order to remove the lid 20 from the cleaning port 13, the lid 20 is rotated in the opposite direction. When the lid body 20 is rotated in the opposite direction, each engagement protrusion 27 of the lid body 20 shown in FIG. 4 slides from the terminal fixing portion 15d of the engagement groove 15 along the slide groove 15c.
When the engagement protrusion 27 shown in FIG. 4 reaches the introduction groove 15b of the engagement groove 15, further rotation of the lid 20 is restricted. Therefore, when the lid 20 is pulled out from the cleaning port portion 13, the engagement protrusion 27 slides along the introduction groove 15 b of the engagement groove 15. Then, the engagement protrusion 27 is detached from the opening 15 a, whereby the lid 20 is removed from the cleaning port 13.

When opening and closing the lid 20 as described above, the operator can rotate the lid 20 by gripping the knob portion 26 provided inside the insertion tube portion 21.
Further, when the lid 20 is opened from the closed state, the engagement projection 27 is formed in the engagement groove when the lid 20 is fixed to the cleaning port 13 because the closed state has been maintained for a long time or when the reaction force of the packing 30 reacts. When the frictional force generated by being pressed against the inner circumferential surface 15 f of the groove 15 is large, it may be difficult to rotate the lid 20 by grasping the knob 26. In such a case, as shown in FIG. 11, a rod-shaped tool T such as a shaft portion of a driver is inserted into a notch 41 from between rising walls 42 and 42 formed on both sides in the radial direction of the flange portion 23. insert. Then, the shaft portion of the driver is turned around the central axis of the insertion tube portion 21. Then, force is transmitted from the tool T to the rising wall 42 and the notch 41 on both sides in the radial direction of the flange portion 23, and the lid 20 can be rotated.

According to the lid 20 and the cleaning joint 10 using the lid 20 described above, the flange portion 23 is provided with a pair of tool engagement grooves 40 formed on both sides of the flange portion 23 with the center therebetween.
Since the tool engagement groove 40 is formed on both sides of the center of the flange portion 23, for example, by engaging a rod-shaped tool T such as a shaft portion of a driver with the tool engagement groove 40, the lid body 20. Can be rotated. Further, the handle of the tool T as a power point is outside the flange portion 23 which is the outermost peripheral portion of the lid body 20 and is located farthest from the central axis of the lid body 20. Thus, the lid 20 can be rotated. In this way, the lid 20 can be easily opened and closed by engaging a rod-shaped tool such as a driver shaft, that is, a general-purpose tool.

And since the notch part 41 and the standing wall 42 should just be formed in the cover body 20 as the tool engaging groove 40, the protrusion dimension from the flange part 23 can be suppressed to the minimum.
In this way, by minimizing the projection size of the lid 20 from the flange portion 23, the cleaning joint 10 can be reduced in size and space.

(Other embodiments)
The lid of the cleaning port joint of the present invention and the cleaning port joint using the same are not limited to the above-described embodiments described with reference to the drawings, and various modifications are possible within the technical scope thereof. Examples are possible.

  For example, a plurality of sets of tool engagement grooves 40 including a pair of notches 41 and rising walls 42 as shown in the above embodiment may be provided at different angles in the circumferential direction of the flange 23. By providing the tool engagement grooves 40 at different angles in the circumferential direction of the flange portion 23, even if a tool T having a large handle is used, the outer periphery of the pipe connection portion 12 p interferes with the handle T and the tool T Inability to engage with the tool engagement groove 40 can be avoided. Further, by providing a plurality of sets of tool engagement grooves 40, the tool T can be engaged at an angle that is easy to rotate according to the shape of the pipe space.

  In addition, the tool engagement groove 40 is composed of a pair of cutout portions 41 and a rising wall 42, but the tool engagement groove 40 may be configured by only one of the cutout portion 41 or the rising wall 42.

  Furthermore, the tool engagement groove 40 has a depth corresponding to the thickness of the flange portion 23 by cutting out a part of the flange portion 23 in the circumferential direction. The tool engagement groove 40 may be formed by forming a recess in a part of the circumferential direction.

  Further, the tool engaging groove 40 has a groove side surface on which the tool T hits on the tip surface side of the flange portion 23 so that the tool can be surely engaged without accidentally coming off when the lid 20 is rotated. You may make it incline so that it may protrude inside the tool engagement groove | channel 40 as it goes.

  Furthermore, in the said embodiment, although the tool engaging groove 40 was formed in the both sides which pinched | interposed the center of the flange part 23, it was formed in the both sides which pinched | interposed the point a little apart from the center of the flange part 23, Also good. By doing so, it becomes difficult for the outer periphery of the pipe connecting portion 12p to interfere with the handle of the tool T.

  Further, the flange portion 23 is formed at the end of the engagement portion 22 opposite to the insertion tube portion 21 side, extending from the engagement portion 22 to the outer peripheral side. The engaging portion 22 protrudes more toward the opening side of the cleaning port portion 13 than the tip portion 13s of the cleaning port portion 13, and the tool engaging groove 40 is formed in the protruding portion of the engaging portion 22. May be.

  Moreover, in the said embodiment, although the knob | pick part 26 was formed so that the front-end | tip part 26s might be located in the obstruction board 24 side rather than the flange part 23 so that the tool T engaged with the tool engagement groove | channel 40 might not interfere. However, the present invention is not limited to this, and the knob portion 26 may be provided so that the tip portion 26s of the knob portion 26 and the tool T do not overlap when the lid 20 is viewed from the cleaning port side. For example, the knob portion 26 may be offset from the tool engaging groove 40 provided on both radial sides of the flange portion 23 in the direction rotated about the central axis of the lid body 20.

Moreover, it is good also as a pair of 2 plate shape provided in parallel with the width | variety wider than the tool engagement groove | channel 40 so that the inserted tool T may be pinched | interposed. Accordingly, if the tool T to be engaged with the tool engaging groove 40 is accommodated between the pair of knobs 26, 26, interference between the tool T and the knob 26 can be avoided.
When the interference between the tool T and the knob portion 26 can be avoided in this way, the tip portion 26s of the knob portion 26 may protrude beyond the flange portion 23, and the knob portions 26 are not two pairs. It may be communicated on the side of the closing plate 24 to form a single knob.

Furthermore, the knob portion 26 protrudes low from the closing plate 24 to such an extent that there is a clearance for the operator's hand to enter between the tip portion 26s of the knob portion 26 and the tool engaged in the tool engaging groove 40. Also good.
By doing so, when the opening of the pipe space and the pipe space itself are narrow, it is not possible to rotate with the handle of the tool T outside the flange portion 23, or for further space saving, the lid 20 Even when the knob 26 is made so small that it is difficult to reduce the projecting dimension and turn it with force, the tool 20 between the tool engaging grooves 40 can be gripped and the lid 20 can be rotated.

  Further, for example, the engaging protrusion 27 and the opening 15a of the engaging groove 15 are formed so that one of the plurality of openings 15a is wider than the other, thereby correctly regulating the direction in which the lid 20 is attached to the cleaning port 13. However, the present invention is not limited to this, and it is only necessary that one of the plurality of engaging protrusions 27 and the opening 15a has a different width or shape from the other. In addition, in the plurality of engaging protrusions 27 and engaging grooves 15, the lid 20 can be attached to the cleaning port 13 by setting the intervals in the circumferential direction of the lid 20 and the cleaning port 13 to be unequal. The direction to do can be regulated correctly.

  Note that when there are two engagement protrusions 27 and two openings 15 a of the engagement grooves 15, the closing plate 24 and the inner peripheral surface of the main conduit 12 k of the pipe member 12 are continuous regardless of the mounting direction of the lid 20. The engaging protrusion 27 and the opening 15a may have the same width. Further, even when the closing plate 24 has a shape in which the inner peripheral surface of the main pipe line 12k of the pipe member 12 is not continuous, it is not necessary to regulate the direction in which the lid 20 is mounted. The portions 15a may have the same width.

Further, the shape and the like of the engagement groove 15 are not limited to the configuration shown in the above embodiment, and other configurations may be adopted as appropriate. For example, in the terminal fixing portion 15d of the engagement groove 15, the groove inner peripheral surface 15f is formed so as to be orthogonal to the axial direction of the cleaning port portion 13, so that the engagement protrusion 27 is displaced toward the sliding groove 15c. Although the lid 20 is prevented from loosening, the present invention is not limited to this. In the sliding groove 15c, a concave portion into which the engaging protrusion 27 is fitted may be formed on the inner circumferential surface of the cleaning port portion 13 on the distal end portion 13s side.
Furthermore, it is good also as a screw structure which used the engaging groove 15 and the engaging protrusion 27 as the internal thread and the external thread, respectively.

  Alternatively, as shown in FIG. 12, the knob 50 is flat when viewed in the direction of the arrow instead of the knobs 26 and 26 of the embodiment described above (that is, when viewed from the protruding direction of the knob 50). The lid 20 may be formed to be openable and closable by inserting a tool (see FIG. 13) 60 such as a wrench having a flat tip and a flat tip into the inner space (tool insertion portion) S.

  In this case, for example, the second notches 51 and 51 can be formed at the tip 50 a of the knob 50. By forming the second cutouts 51 and 51 in this way, the lid 20 can be rotated by fitting a tool that is shorter than a tool fitted into the cutouts 41 and 41 formed in the flange portion 23. It becomes possible. The second notches 51 and 51 are preferably formed on a diameter passing through the center of the flange portion 23.

Further, the knob 50 may be formed with a projecting dimension smaller than that of the flange 23, or the tip 50 a may be formed on substantially the same plane as the end surface 23 a of the flange 23.
The longitudinal direction of the knob 50 is oriented in the horizontal direction, the second notches 51 and 51 are formed on the same diameter as the notches 41 and 41, and the tip 50a of the knob 50 is a flange. It may be formed on substantially the same plane as the portion 23. In this case, it becomes possible to fit a rod-like member that rotates the lid 20 to any or all of the notches 41, 41 and the second notches 51, 51.

As shown in FIG. 12, FIG. 14 or FIG. 15, through holes 56 and 57 through which a string-like member 55 such as a ball chain shown in FIG. It is good to be formed.
In the lid body 20, the through hole 56 may be formed at a position near the lower side of the lid body 20 so as not to interfere with the rotation of the lid body 20 by fitting a bar-like member into the notches 41 and 41. .

In the cleaning port portion 13, the through hole 57 may be formed below the cleaning port portion 13, preferably at the lowest position.
By forming the through holes 56 and 57 in this way, the lid 20 can be suspended below the cleaning port 13 when the lid 20 is removed from the cleaning port 13. The effect that the trouble of the storage place of the cover material 20 with which the surface of 24 duct sides becomes dirty is acquired. Moreover, it can prevent that the cover body 20 is accidentally dropped.

  Further, by forming the through holes 56 and 57 at the positions described above, the lid 20 is suspended below the cleaning port 13 when the lid 20 is removed from the cleaning port 13. Can be prevented from interfering with the maintenance of the exhaust pipe.

  In addition to this, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Cleaning port joint 12p Pipe connection part 13 Cleaning port part 15 Engagement groove 20 Cover body 21 Insertion cylinder part (insertion part)
23 Flange part 27 Engagement protrusion 40 Tool engagement groove 41 Notch part 42 Standing wall 50 Knob part 56 Through hole 57 Through hole S Inner space (tool insertion part)

Claims (6)

An insertion portion to be inserted into the cleaning port portion;
An annular flange portion formed to extend radially outward from one end of the insertion portion;
A plurality of engagement protrusions engaged with a plurality of engagement grooves formed in the cleaning port by rotating around the central axis of the insertion portion;
The said flange part is provided with a pair of tool engaging groove formed in the both sides which pinched | interposed the center of the said flange part, The cover body of a cleaning-mouth-joint characterized by the above-mentioned.   2. The tool engagement groove is formed by a notch or a recess formed in a part of the flange portion in a circumferential direction on both sides of the flange portion with the center therebetween. The cover of the cleaning joint as described in 1.   The tool engagement groove includes a pair of rising walls that rise from the flange portion at intervals in the circumferential direction of the flange portion on each of both sides across the center of the flange portion. Or the cover of the cleaning joint as described in 2. On the inside of the flange portion, a knob portion formed in a flat cylindrical shape is formed,
The interior of the said knob | pick part is a tool insertion part, The cover body of the cleaning mouth joint of any one of Claim 1 to 3 characterized by the above-mentioned. A joint main body having a pipe connecting portion to which pipes are connected to both ends, and a cleaning port portion formed between the pipe connecting portions,
The lid according to any one of claims 1 to 3, attachable to the cleaning port of the joint body,
A cleaning mouth joint comprising:   The through-hole through which a string-like member can be inserted is formed in the joint body and the lid, respectively, The cleaning mouth joint according to claim 5 characterized by things.

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