JP4280103B2 - Inspection port lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for an inspection port provided at a bent portion or a junction portion of a drain pipe in order to perform inspection or cleaning in a drain pipe such as a building.
[0002]
[Prior art]
Conventionally, an inspection port with a lid is installed in a bent part or a junction part of a drain pipe to inspect and clean the pipe. FIG. 4 is a plan view of a conventional inspection port lid, and the lid 20 is detachably screwed into a cylindrical mouth body as a receiving portion. The lid 20 is provided with a knob 22 formed integrally with the closing portion 21 so as to be tightened or loosened by hand. The knob 22 has a rectangular shape with a central portion in plan view, and forms a finger engagement portion.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 60-19179 (2 pages, Fig. 3)
[0004]
As another conventional example, a pair of concave portions are formed in the lid of the inspection port that is detachably screwed into the cylindrical mouth body, and the pair of convex portions 23, 23 ′ of the dedicated lid opening / closing wrench 24 shown in FIG. There is one that is inserted into a concave portion of the lid, and the lid opening / closing wrench 24 is rotated to open and close the lid.
[0005]
[Problems to be solved by the invention]
However, in the drainage pipe in the piping, the inspection port located at a position where water pressure is likely to occur such as at the junction, bites between the male screw part of the lid and the female screw part of the cylindrical mouth body that is the receiving part. When checking, the lid cannot be easily loosened by hand. In addition, when it is difficult to loosen by hand, there is a problem that it is necessary to prepare a lid opening / closing wrench, which is a dedicated tool, in advance.
[0006]
The present invention has been made to solve the above-described problem, and can easily open and close the lid of the screw fitting type inspection port by hand. If it is difficult to open and close by hand, the lid can be opened and closed using a lid opening and closing wrench, which is a special tool. Further, the present invention provides a drainage pipe inspection port lid that can open and close the lid even when a general tool such as a screwdriver or a spanner is used even when a dedicated tool cannot be prepared.
[0007]
[Means for Solving the Problems]
The present invention relates to a screwed lid that detachably closes an inspection port of a drain pipe, and on the upper surface of the lid, a pair of convex portions that are symmetrical with respect to the center of the lid are formed, and the top of the convex portion The lid of the inspection port is characterized by forming a recessed portion into which a projection of the lid opening / closing wrench can be inserted.
[0008]
2. The inspection port cover according to claim 1, wherein the pair of convex portions have straight portions on the side surfaces thereof, the extension lines being parallel lines in a plan view, and the corner portions are arcuate. Is the body.
[0009]
[Action]
In the present invention, a pair of convex portions are formed in the closed portion of the screw fitting type opening / closing lid body at a constant interval symmetrically with the central axis of the lid body. You can open and close the lid by putting your finger on it and turning the lid with your hand. In addition, since the top of the pair of convex portions of the lid has a recessed portion for inserting the lid opening / closing wrench, the pair of convex portions of the dedicated lid opening / closing wrench is inserted into the recessed portion of the lid and rotated. Can be opened and closed.
[0010]
Furthermore, a rod-shaped tool such as a screwdriver is assigned between the pair of convex portions formed on the lid, and the tool's operating point abuts against the pair of convex portions at an interval. I can do it.
[0011]
In addition, since the pair of convex portions, which are spaced apart from each other, have a straight line portion whose extension line is the same parallel line on the side surface in a plan view, it can be sandwiched and opened by a general-purpose monkey wrench.
[0012]
In addition, the corners are arc-shaped, the touch of the fingers hung on the convex portions is good, and a force is easily applied to the hand, so that the lid can be easily rotated and opened / closed. That is, the lid of the inspection port according to the present invention can be opened and closed by selecting any one of rotation by hand, rotation by a dedicated lid opening / closing wrench, and rotation by a general-purpose tool such as a rod-shaped tool or a monkey wrench. .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The lid of the inspection port according to the present invention will be described below. FIG. 1 is a plan view of an inspection port 1 according to an embodiment of the present invention, and FIG. 2 is a side partial sectional view of FIG. In order to inspect and maintain the piping in the building, the inspection port 1 is connected to the drainage pipe P at the junction and the bent portion of the piping. The inspection port 1 includes a short tubular receiver 2 and a lid 3 that is detachably screwed into the receiver 2 and inserted therein. Further, an O-ring 4 is sandwiched between the receiver 2 and the lid 3 and sealing is possible by screwing.
[0014]
A female screw portion 5 is provided on the inner periphery of the receiver 2, and a step portion 6 with which the O-ring 4 abuts is extended. Further, a stopper portion 7 is provided on the outer periphery of the receptacle 2 so that when the receptacle 2 is inserted into the end of the drain pipe P, the drain pipe P and the receptacle 2 can be easily bonded and fixed. Yes. The receptacle 2 is inserted into the drain pipe P, but may be extrapolated.
[0015]
A pair of convex portions 10, 10 ′ are integrally formed on the upper surface of the closing portion 8 of the lid body 3 at a position spaced apart from each other via a step portion 9, with respect to the center C of the lid body 3. The convex portions 10 and 10 'are located symmetrically. Further, recessed portions 11 and 11 ′ are formed on the tops of the convex portions 10 and 10 ′ so as to be fitted to the convex portions 23 and 23 ′ of the lid opening / closing wrench 24 shown in FIG.
[0016]
A cylindrical male screw portion 13 is integrally formed on the lower surface of the closing portion 8 of the lid 3, and an O-ring 4 is attached to the concave portion 14 between the closing portion 8 and the male screw portion 13. Yes. The O-ring 4 is pressed between the step portion 6 and the closing portion 8 of the receiving body 2 by the screwing of the lid body 3 to enable sealing.
[0017]
Next, a method of screwing and inserting the lid 3 into the receiving port 2 and removing it will be described. First, the lid 3 can be rotated and opened and closed by placing a hand on the pair of convex portions 10 and 10 '. The convex portions 10 and 10 ′ are preferably in a columnar shape, and an arcuate columnar shape in which each side corner portion has a curved surface portion 12 is preferable.
[0018]
When the lid 3 cannot be rotated by hand, the convex portions 23 and 23 ′ of the lid opening / closing wrench 24 of the dedicated tool are inserted into the concave portions 11 and 11 ′ of the pair of convex portions 10 and 10 ′. The body 3 can be rotated to open and close.
[0019]
Further, when the dedicated tool is not at hand, as shown in FIG. 1, a rod-shaped tool T such as a screwdriver is inserted between the pair of convex portions 10, 10 ′ of the lid 3, and the lid 3 is rotated. To do. At this time, the moment at the point of action between the pair of convex portions 10, 10 ′ and the rod-shaped tool T with respect to the lid center C acts, so that the lid 3 can be easily opened and closed. In addition, although the cover body 3 is inserted in the receiving body 2, it does not matter even if it is extrapolated.
[0020]
FIG. 3 shows an embodiment using other tools. On the side surfaces of the pair of convex portions 10, 10 'of the lid 3, parallel straight portions 14a, 14b and 14a', 14b 'are formed in plan view, and straight lines connecting 14a, 14a' , 14b, and 14b 'are parallel to each other, so that the tool is rotated by sandwiching one linear portion 14a, 14a' on the parallel line with the other straight portion 14b, 14b 'on the parallel line with the monkey wrench M of a general-purpose tool. By doing so, the lid 3 can be easily opened and closed.
[0021]
【The invention's effect】
As described above, according to the lid of the inspection port of the present invention, it is possible to select either rotation by hand, rotation by a dedicated lid opening / closing wrench, or rotation by various general-purpose tools. The method according to the situation of the piping location can be selected, and the lid of the inspection port can be easily rotated to open and close.
[Brief description of the drawings]
FIG. 1 is a plan view of an inspection port according to an embodiment of the present invention.
FIG. 2 is a half sectional view taken along line AA of FIG.
FIG. 3 is a plan view of an inspection port according to an embodiment of the present invention.
FIG. 4 is a conventional example.
FIG. 5 is a conventional tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inspection port 2 Receptacle 3 Cover body 5 Female thread part 10, 10 'Convex part 11, 11' Recessed part 12 Curved surface part 13 Male thread part 14a, 14b, 14a ', 14b' Straight line part

Claims (2)

In a screwed lid that detachably closes an inspection port of a drain pipe, a pair of convex portions symmetrical to the center of the lid is formed on the upper surface of the lid, and a lid is formed on the top of the convex portion. A lid for an inspection port, wherein a recess is formed into which a projection of an open / close wrench can be inserted. The lid of the inspection port according to claim 1, wherein the pair of convex portions have straight portions on the side surfaces thereof, the extension lines being parallel lines in plan view, and the corner portions are arcuate.

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