JP5290369B2 - Plug device for pipe end - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe end plug unit activated to press a fitting portion of a plug member so as to be fittingly inserted into the inner face of a socket, and activated to press the plug member so as to depart from the inner face of the socket. <P>SOLUTION: The pipe end plug unit is composed of: the plug member 10 including the fitting portion 10a having an outer peripheral face whose diameter is smaller than the inner diameter of the socket 6 constituting a pipe end portion and fittingly inserted into the inner face of the socket 6 and a large-diameter collar portion 10b having the fitting portion 10a at the approximate center and bolt holes for fixing it to the socket 6; a fixing member 12 fixed to the outer surface of the socket 6; and engaging bolts 14 engaged to the fixing member 12 and the collar portion 10b of the plug member 10. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention has an outer peripheral surface having a diameter smaller than the inner diameter of the receiving port constituting the pipe end portion, and a fitting insertion portion to be inserted into the inner surface of the receiving port, and the fitting insertion portion at a substantially center with respect to the receiving port. The present invention relates to a plug device for a pipe end portion which is at least composed of a plug member provided with a large-diameter bowl-shaped portion having a bolt hole for fixing.

  The conventional pipe end plug device has a seal member disposed in the gap between the end surface of the receiving port and the end surface of the plug member that is inserted into the receiving port, in the circumferential direction of the end surface of the receiving port. Using the reaction force of the fixing member fixedly attached to a predetermined position on the outer surface of the receiving port, the plug member is pressed and held on the end surface side of the receiving port to seal the receiving port in a watertight manner (for example, Patent Document 1).

Japanese Utility Model Publication No. 48-94414 (first page, FIG. 2)

  However, in Patent Document 1, as shown in FIG. 9 as a conventional example of a plug device, a seal member 111 formed of a ring body is provided between an end surface of a plug member 110 and an end surface of a receiving port 106, that is, a receiving port. It is arranged along a circumferential direction at a predetermined position outside the 106, and the receiving port 106 is sealed in a watertight manner by tightening with bolts and nuts 120.

  When the stopper device is configured as in the above-described conventional example, there is a possibility that the bolt / nut 120 tightened with the seal member 111 may be loosened over a long period of time, so that the sealing performance of the seal member 111 cannot be maintained. It was. Further, since the outer peripheral surface of the seal member 111 is affected by temperature, humidity change, earth pressure, atmospheric pressure, etc. outside the receiving port 106 for a long period of time, the quality of the seal member 111 is deteriorated and the sealing performance is maintained. There was also a risk of being unable to do so.

  In order to eliminate the above-described concern, for example, when the seal member is arranged to seal the gap between the outer surface of the insertion portion of the plug member and the surface of the receiving port, the plug member is fitted to the inner surface of the receiving port. Under the inserted condition, the seal member is hidden from the outside of the receiving port by the hook-shaped portion, so that the seal member seals the gap between the outer surface of the insertion portion and the inner surface of the receiving port along the circumferential direction. A problem arises in that it cannot be confirmed whether or not

  The present invention has been made paying attention to such problems.

In order to solve the above problems, a plug device for a pipe end of the present invention is:
A fitting insertion portion that has an outer peripheral surface smaller in diameter than the inner diameter of the receiving port constituting the pipe end portion, and is fitted to the inner surface of the receiving port; A plug member having a large-diameter bowl-shaped portion having a bolt hole for,
A fixing member fixed to the outer surface of the receptacle;
An engagement bolt engaged with the fixing member and the hook-shaped portion of the plug member;
An inner surface of the fixing member is formed on a tapered surface that expands toward the opening of the receiving port so as to face an outer peripheral surface of the receiving port that is formed on a tapered surface that expands toward the opening of the receiving port. And
A plurality of extending portions extending in the circumferential direction in the fixing member extending toward the end surface of the hook-shaped portion of the plug member are formed .
According to this feature, the engaging bolt is operated to press and insert the plug member into the inner surface of the receiving port using the reaction force of the fixing member, and the plug member is detached from the inner surface of the receiving port. Press to actuate.
Then, the fixing member abuts against the tapered surface that expands toward the opening of the receiving port, and movement in the direction of the plug member is prevented. The plug member can be inserted and operated by reliably using the force. Furthermore, the hook-shaped portion of the plug member is brought into contact with the extending portions formed at a plurality of locations in the circumferential direction of the fixing member by the engagement of the engagement bolts, so that the insertion depth of the plug member is aligned in the circumferential direction. Can be equal.

The plug device for the pipe end of the present invention is
The fixing member is characterized in that an overhanging portion that protrudes toward the tube axis of the receiving port is formed so as to contact the end surface of the receiving port.
According to this feature, the protruding portion of the fixing member comes into contact with the end face of the receiving port, and the fixing member is prevented from moving in the inward direction of the receiving port in the tube axis direction. can do.

The plug device for the pipe end of the present invention is
A bolt screw hole is opened in the fixing member toward the outer peripheral surface of the receiving port, and a push bolt is screwed into the bolt screw hole to restrict relative movement of the fixing member in the axial direction with respect to the receiving port. It is characterized by that.
According to this feature, a bolt screw hole is opened in the fixing member toward the outer peripheral surface of the receiving port, and the axial movement relative to the receiving port of the fixing member is restricted by the push bolt screwed into the bolt screw hole. In addition, positioning can be performed with the axial center of the fixing member aligned with the tube axis of the receiving port.

It is the schematic which shows piping using the plug apparatus for piping edge parts in Example 1. FIG. It is an assembly exploded view of the stopper device. (A)-(c) is a perspective view which shows the penetration condition of a volt | bolt nut. (A) is a partial cross section figure which shows the state which assembled | attached the stopper apparatus to the receptacle, (b) is an enlarged view of the dotted-line enclosure part of (a). It is a rear view of the stopper device in the tube axis direction. It is a front view of the stopper device in the tube axis direction. It is an expanded sectional view showing the situation of removing a stopper device It is a partial cross section figure which shows the state which assembled | attached the stopper apparatus in the receiving port in Example 2. FIG. It is sectional drawing which shows the state which assembled | attached the stopper apparatus in the receiving port in a prior art example.

  Examples of the present invention will be described below.

  Example 1 of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic view showing a pipe using a plug device for a pipe end part in Example 1. FIG. FIG. 2 is an exploded view of the stopper device. 3 (a) to 3 (c) are perspective views showing the insertion state of bolts and nuts. FIG. 4A is a partial cross-sectional view showing a state in which the stopper device is assembled to the receiving port, and FIG. 4B is an enlarged view of a dotted line encircled portion of FIG. FIG. 5 is a rear view of the stopper device in the tube axis direction. FIG. 6 is a front view of the stopper device in the tube axis direction. FIG. 7 is an enlarged cross-sectional view showing a situation where the stopper device is removed.

  First, as shown in FIG. 1, a plug device 2 for a pipe end of the present invention constitutes a part of a pipe 1 that forms a flow path such as a water and sewage system, for example, an embedded object such as an existing pipe. 3 is used to at least temporarily block the flow path, and the receiving port 6 constituting the end of the pipe 1 is sealed in a watertight manner.

  The pipe 1 is not limited to the flow path at the time shown in FIG. 1, and is often shown in FIG. 1 because there are many plans or possibilities for expanding or changing the flow path in the future. In addition to the original flow path used at the time, a straight pipe 4 or a T-shaped pipe 5 as a branch pipe is provided in advance, and the plug device 2 is opened at the receiving port 6 constituting the end of the pipe 1. Install so that it can be plugged.

  Next, the insertion and removal of the plug member 10 of the plug device 2 from the receiving port 6 will be described below.

  As shown in FIG. 2, the plug device 2 of the present invention has an insertion insertion portion 10 a slightly smaller in diameter than the inner diameter of the receiving port 6 to be inserted into the inner surface of the receiving port 6, and a larger diameter than the outer diameter of the receiving port 6. A stopper member 10 having a hook-shaped portion 10b, a fixing member 12 fixedly fixed at a predetermined position on the outer surface of the receiving port 6, an outer surface of the fitting insertion portion 10a of the plug member 10 and an inner surface of the receiving port 6 The seal member 11 that seals the gap between the plug member 10 and the member are integrally engaged with each other as will be described later, so that the fitting insertion portion 10a of the plug member 10 is inserted into the inner surface of the receiving port 6. And a bolt and nut 20 including an engagement bolt engaged to hold.

  The outer peripheral surface of the fitting insertion portion 10a of the plug member 10 is a curved surface formed substantially flush with the tube axis direction, and is continuous with the end surface of the bowl-shaped portion 10b. Moreover, it opens toward the ring-shaped sealing member 11 which seals the clearance gap between the outer surface of the fitting insertion part 10a and the inner surface of the receiving port 6 along the circumferential direction so that it may mention in the end surface of the collar-shaped part 10b. The openings 10f thus formed are opened at a plurality of locations (four locations in this embodiment) equally along the circumferential direction. The opening 10f is opened in the vicinity of the outer peripheral surface of the fitting insertion portion 10a.

  The attachment of the fixing member 12 to the outer surface of the receiving port 6 will be described. The fixing member 12 has an upper and lower divided structure, and the attachment is inserted through a mounting bolt hole (not shown) at a predetermined position on the outer surface of the receiving port 6. It is fixed with bolts and nuts 13.

  The receiving port 6 constitutes a so-called straight pipe end, and the outer peripheral surface of the receiving port 6 at the predetermined position is formed as a tapered surface 6a that expands toward the opening of the receiving port 6, and the tapered surface 6a. The inner surface of the fixing member 12 that comes into contact with is formed in a tapered shape that expands toward the opening of the receiving port 6 so as to face each other. The fixing member 12 is in contact with the tapered surface 6a, and movement in the direction of the plug member 10 is prevented. Moreover, the bulging part 6b which bulges outward along the circumferential direction is formed in the outer peripheral surface in the receiving port 6 edge part, and the plug member 10 direction of the fixing member 12 is also formed by the bulging part 6b. Movement to is prevented.

  Further, four projecting portions 12a projecting toward the tube axis C of the receiving port 6 are formed along the circumferential direction so that the fixing member 12 contacts the end surface 6d of the receiving port 6 (FIG. 5). Reference), the projecting portion 12a abuts against the end surface 6d of the receiving port 6, so that the fixing member 12 is prevented from moving inward of the receiving port 6 in the tube axis C direction. Furthermore, an extending portion 12e extending toward the flange-shaped portion 10b side of the plug member 10 is formed in the protruding portion 12a.

  A seal member 11 that is a ring body having substantially the same diameter as the inner diameter of the receiving port 6 and has elasticity, a fitting portion 11a that is fitted in a recess 6c formed along the circumferential direction on the inner surface of the receiving port 6, And a valve portion 11b for sealing a gap between the stopper member 10 and the receiving port 6.

  The bolt / nut 20 includes a T-head bolt 14 as an engagement bolt having a T-shaped head 14 a formed in a T-shape, and a first nut 15 and a second nut screwed into the T-head bolt 14. 16 and. The T-head bolt 14 includes a bolt hole 10c provided in the flange-shaped portion 10b of the plug member 10 and a bolt hole 12c substantially on the same axis as the central axis D of the bolt hole 10c provided in the flange 12b of the fixing member 12. In addition, the T-shaped head portion 14a is disposed on the fixing member 12 side and inserted. The first nut 15 is screwed into the T-head bolt 14 on the fixing member 12 side of the hook-shaped portion 10b, and the second nut 16 is T-head bolt so as to sandwich the first nut 15 and the hook-shaped portion 10b. 14 is screwed. The T-head bolts 14, the first nuts 15, and the second nuts 16 are arranged at predetermined intervals in a direction substantially parallel to the tube axis C direction along the circumferential direction of the receiving port 6.

  Further, a stopper 17 proximate to the rear side of the T-shaped head 14 a of the T-head bolt 14 in the direction of the central axis D extends from the outer surface of the fixing member 12. As shown in FIG. 5, the stopper 17 is slightly longer than the outer diameter of the neck lower portion 14 b of the T-head bolt 14 and includes a gap portion 17 a on the substantially same axis as the central axis D.

  As shown in FIGS. 3A to 3C, the insertion of the T-head bolt 14 into the bolt hole 12 c will be described. First, the T-head bolt 14 is connected to the center axis of the bolt hole 12 c on the back side of the stopper 17. It is arranged substantially coaxially with D, and the neck lower portion 14b of the T-head bolt 14 is passed through the gap portion 17a in the central axis D direction, and then the neck lower portion 14b is inserted into the bolt hole 12c (see FIG. 3A). Next, the T-shaped head portion 14a is lifted so as to be separated from the outer surface of the fixing member 12, and the neck lower portion 14b is further inserted into the bolt hole 12c in an oblique direction (see FIG. 3B). The T-head bolt 14 is installed substantially coaxially with the central axis D at a position between the bolt hole 12c and the stopper 17 so that the portion 14a gets over the stopper 17 (see FIG. 3C).

  In this way, the neck lower part 14b of the T-head bolt 14 can be passed through the gap 17a of the stopper 17 and the neck lower part 14b can be inserted into the bolt hole 12c, so that it is close to the rear side of the T-shaped head 14a. The T-head bolt 14 can be installed by disposing the T-shaped head portion 14a between the bolt hole 12c and the stopper 17 without the hindrance of the stopper 17 provided on the head.

  As shown in FIG. 4A, the insertion operation of the plug member 10 into the receiving port 6 will be described. The second nut 16 is screwed in a direction close to the T-shaped head 14 a of the T-head bolt 14. As a result, the T-head bolt 14 and the second nut 16 are pressed so as to fit the plug member 10 into the inner surface of the receiving port 6 using the reaction force of the fixing member 12.

  The fixing member 12 abuts against the tapered surface 6a whose outer peripheral surface expands toward the opening of the receiving port 6, and is prevented from moving in the direction of the plug member 10. By doing in this way, a bolt and a nut 20, the plug member 10 can be inserted and operated by reliably using the reaction force of the fixing member 12.

  The valve portion 11b of the seal member 11 is compressed in the gap between the outer surface of the fitting insertion portion 10a of the plug member 10 and the inner surface of the receiving port 6 as the plug member 10 moves inward of the receiving port 6 and the gap Seal watertight. Since the plug member 10 fitted inward of the receiving port 6 is held in a state in which it does not move with respect to the receiving port 6 by the T-head bolt 14 and the second nut 16, the valve portion 11b has the gap. Keeping hermetically sealed.

  Further, an extending portion 12e extending toward the end surface of the hook-shaped portion 10b of the plug member 10 is formed in the protruding portion 12a of the fixing member 12 along the circumferential direction. When the plug member 10 is inserted into the receiving port 6 by the engagement of the engagement bolt, the end surface of the hook-shaped portion 10b comes into contact with the extending portion 12e, so that the fitting insertion portion 10a of the plug member 10 is fitted. The insertion depth is made equal along the circumferential direction, and the fitting axis 10a and the seal member 11 can be adjusted in the tube axis C direction.

  Next, as shown in FIG. 4B, after the above-described insertion operation of the plug member 10 is finished, the seal member 11 is located between the inner surface of the receiving port 6 and the outer surface of the insertion portion 10 a of the plug member 10. It is confirmed as follows whether or not is sealed in a predetermined manner. That is, the thin plate-like body S having a predetermined rigidity as a sealing confirmation means formed with a smaller diameter than the opening 10f provided in the bowl-shaped portion 10b is directed from the outside of the plug member 10 to the inside of the receiving port 6. The insertion depth of the thin plate-like body S until the seal member 11 is inserted into the opening 10f and the gap between the outer surface of the insertion portion 10a and the inner surface of the receiving port 6 is sealed. By measuring the thickness, it is possible to confirm whether or not the seal member 11 has sealed the gap.

  Further, the openings 10f are uniformly formed at a plurality of locations (four locations in the present embodiment) along the circumferential direction, and the thin plate-like body S is inserted into each of the openings 10f at the plurality of locations, and the insertion depth thereof. By comparing these, it can be confirmed whether or not the seal member 11 seals the gap evenly along the circumferential direction. Moreover, it is easy to open an opening part equally and the gravity center of a bowl-shaped part is stabilized.

  Furthermore, when the thin plate-like body S is inserted toward the seal member 11 using the outer peripheral surface of the insertion portion 10a that is formed substantially flush with the flange portion 10b, the outer periphery of the insertion portion 10a. The thin plate-like body S can be guided by the surface. In addition, if it forms so that the one side edge of the opening part 10f and the outer peripheral surface of the fitting insertion part 10a may become substantially flush, the one side edge of the opening part 10f formed in such a substantially flush manner is inserted. The thin plate-like body S can be guided more smoothly toward the seal member 11 using the outer peripheral surface of the portion 10a.

  Thus, the sealing member 11 that seals the gap between the outer surface of the insertion portion 10a and the inner surface of the receiving port 6 by inserting the insertion portion 10a of the plug member 10 into the inner surface of the receiving port 6 has a bowl shape. Even in a situation where the portion 10b is hidden from the outside of the receiving port 6, it can be confirmed whether or not the seal member 11 is sealed by using the opening 10f formed in the bowl-shaped portion 10b.

  In addition, the specific specification of the thin plate-like body S as the sealing confirmation means described above is, for example, a scale is previously displayed in the longitudinal direction, and the insertion depth of the thin plate-like body S may be measured by this scale. Good. Further, the sealing confirmation means may be, for example, a fiberscope using an optical fiber, a simple wire, or the like as long as it can be inserted into the opening 10f. Further, if the opening 10f is used as the above-described sealing confirmation means, it is not always necessary to use a thin plate-like body that is inserted into the opening 10f. For example, the inside of the opening 10f from the outside of the plug member 10 can be used. The sealing condition of the seal member 11 may be confirmed by visually checking the direction.

  Next, as shown in FIG. 7, the detachment operation of the plug member 10 from the receiving port 6 will be described. First, the second nut 16 is screwed and removed from the T-head bolt 14, and then the first nut 15 is removed by T. By screwing the head bolt 14 in a direction away from the T-shaped head portion 14a, the T-head bolt 14 and the first nut 15 use the stopper 17 as a reaction force, and the stopper member 10 is used as the inner surface of the receiving port 6. It operates to push away from.

  At this time, the protruding portion 12a of the fixing member 12 protruding toward the center of the tube axis C of the receiving port 6 comes into contact with the end surface 6d of the receiving port 6, and the fixing member 12 is fixed in the direction of the tube axis C. 12 is prevented from moving inwardly, and after the T-shaped head 14a of the T-head bolt 14 comes into contact with the stopper 17, the first nut 15 is further rotated to release the plug member 10. I can do it.

  When the first nut 15 is screwed out or the second nut 16 is screwed in as described above, the T-head bolt 14 is formed so that the T-shaped head 14a formed in the T-shape is fixed to the fixing member 12. Since the rotation is prevented by coming into contact with the outer surface, only the first nut 15 or the second nut 16 is used by the tool without requiring the T-head 14a to be rotated by a special tool such as a spanner. By turning, it can be screwed out or screwed in.

  Further, as shown in FIG. 4A, the plug member 10 is formed with a water drain hole 10d and an air vent hole 10e for discharging fluid such as water or air inside the sealed receiving port 6 to the outside. The plugs 40 and 41 are respectively screwed in a detachable and watertight manner. By doing in this way, even after sealing the plug member 10 to the receiving port 6, by removing the plugs 40 and 41 as appropriate without removing the plug member 10 with labor, water or the like inside the receiving port 6 can be obtained. Can be easily discharged to the outside of the receiving port 6.

  In particular, in the case of this embodiment, a stopper 17 is provided at a predetermined position of the fixing member 12 close to the rear side of the T-shaped head 14 a of the T-head bolt 14, and the second nut 16 is connected to the T-head bolt 14. When the T-shaped head 14a is screwed in a direction away from the T-shaped head 14a, the T-shaped head 14a immediately comes into contact with the stopper 17 formed at a close position. Therefore, the stopper member 17 can be operated to be pushed away from the inner surface of the receiving port 6 by using the reaction force of the stopper 17.

  Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a partial cross-sectional view showing a state in which a stopper device is assembled to a receiving port in the second embodiment. The description of the same configuration as that of the first embodiment is omitted.

  As shown in FIG. 8, the receiving port 8 in this embodiment constitutes an end portion of a so-called deformed tube, and a recess 8 a is formed in a part of the outer peripheral surface of the receiving port 8 along the circumferential direction. ing. The fixing member 22 of the present embodiment has substantially the same configuration as that of the first embodiment, but a bolt screw hole 22f that opens toward the outer peripheral surface of the receiving port 8 in which the recess 8a is formed is screwed. ing. A push bolt 23 is screwed into the bolt screw hole 22f to restrict relative movement of the fixing member 22 in the axial direction with respect to the receiving port 8.

  By doing so, the fixing member 22 is securely fixed to the receiving port 8 in the tube axis direction by screwing the push bolt 23 toward the outer peripheral surface of the receiving port 8. By using the stopper 17 provided on the fixed member 22 that is securely fixed as a reaction force, and removing the T-head bolt 14 and the nuts 15 and 16 in the same manner as in the first embodiment, the stopper member 10 is received by the receptacle. 8 can be inserted or removed.

  Further, a bolt screw hole 22f is opened toward the outer peripheral surface of the receiving port 8 in the fixing member 22, and relative to the receiving member 8 of the fixing member 22 in the axial direction by a push bolt 23 screwed into the bolt screw hole 22f. Since the movement is restricted and the axial center of the fixing member 22 is aligned with the tube axis C of the receiving port 8, positioning is possible. The axial center of the part 10a and the seal member 11 can be adjusted.

  In particular, since the recess 8a is formed on the outer peripheral surface of the receiving port 8 into which the push bolt 23 is screwed, and the push bolt 23 is screwed into the recess 8a, the T-head bolt 14 and the nuts 15 and 16 can be attached and detached. When the fixing member 22 is about to move in the tube axis direction with respect to the receiving port 8, the fixing bolt 22 comes into contact with the peripheral side wall of the concave portion 8 a, so that the fixing member 22 is more reliably fixed to the receiving port 8. Fixed.

  After the above-described plug device is attached to the receiving port, fluid pressure such as water pressure is applied to the inside of the pipe, and the plug member is pressed in a direction away from the receiving port, but the fixing member integrated with the plug member by the bolt and nut However, since the axial movement with respect to the receiving port is restricted by the push bolt, the plug member does not come off from the receiving port, and the sealing property of the receiving port is maintained.

  The push bolt is not necessarily screwed into the recess 8a formed on the outer peripheral surface of the receiving port 8. For example, the push bolt is formed at the opening of the receiving port as in the first embodiment. It may be screwed into the receiving port 6 formed in the tapered surface 6a that expands toward the diameter, and the bulging surface is formed in the receiving port in which a bulging surface bulging in the outer peripheral direction is formed at the opening end. It may be screwed so as to be along the side peripheral wall of the exit surface.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the first embodiment, the outer peripheral surface of the receiving port 6 is formed on the tapered surface 6 a that expands toward the opening of the receiving port 6, and the fixing member contacts the tapered surface 6 a in the direction of the plug member 10. In the second embodiment, the outer peripheral surface of the receiving port 8 is formed in the concave portion 8a along the circumferential direction, and the push bolt 23 is screwed toward the concave portion 8a to fix the fixing member. 22 is prevented from moving in the direction of the plug member 10, but the shape and specifications of the fixing member are in accordance with the shape of the outer surface of the receiving port if movement in the tube axis direction with respect to the receiving port is prevented. For example, the outer surface at the end of the receiving port is formed only on the bulging portion 6b that bulges in the circumferential direction, and a fixing member attached to a predetermined position on the outer surface of the receiving port is provided. The movement of the receiving port in the opening direction is fixed by coming into contact with the bulging portion 6b. It may be obtained by.

  Moreover, in the said Example, although the volt | bolt nut 20 which engaged the fixing member 12 and the plug member 10 consists of the T head volt | bolt 14 as an engagement volt | bolt, the 1st nut 15, and the 2nd nut 16, The engagement bolt is not necessarily limited to the T-head bolt 14 whose head is formed in a T shape, and may be a hexagon bolt, for example. Further, the nut screwed into the engagement bolt is not limited to the above-described configuration. For example, only the second nut is screwed in for insertion of the plug member, and the plug member is removed by the above-described first nut. Other methods may be used regardless of the screwing. Further, the nut described above may not be screwed into the engagement bolt, and for example, the engagement bolt may be directly screwed into the bolt hole of the hook-shaped part or the bolt hole of the fixing member.

DESCRIPTION OF SYMBOLS 1 Pipe 2 Plug apparatus 3 Embedded object 4 Straight pipe 5 T-shaped pipe 6 Receptacle 6a Tapered surface 6b Swelling part 6c Recessed part 6d End face 8 Receptacle 8a Recessed part 10 Plug member 10a Insertion part 10b Bolt part 10c Bolt hole 10d Water Vent hole 10e Air vent hole 10f Opening portion 11 Seal member 11a Fitting portion 11b Valve portion 12 Fixing member 12a Overhang portion 12b Hook portion 12c Bolt hole 12d Mounting bolt hole 12e Extension portion 13 Mounting bolt nut 14 T head bolt (engagement) bolt)
14a T-shaped head portion 14b Neck lower part 15 First nut 16 Second nut 17 Stopper 17a Gap 20 Bolt / nut 22 Fixing member 22f Bolt screw hole 23 Push bolt 40, 41 Plug C Pipe axis D Center axis S Thin plate

Claims (3)

A fitting insertion portion that has an outer peripheral surface smaller in diameter than the inner diameter of the receiving port constituting the pipe end portion, and is fitted to the inner surface of the receiving port; A plug member having a large-diameter bowl-shaped portion having a bolt hole for,
A fixing member fixed to the outer surface of the receptacle;
An engagement bolt engaged with the fixing member and the hook-shaped portion of the plug member;
An inner surface of the fixing member is formed on a tapered surface that expands toward the opening of the receiving port so as to face an outer peripheral surface of the receiving port that is formed on a tapered surface that expands toward the opening of the receiving port. And
A plug device for a pipe end , wherein a plurality of extending portions extending in the circumferential direction are formed on the fixing member so as to extend toward an end face of the hook-shaped portion of the plug member . 2. The pipe end portion according to claim 1, wherein an extension portion that extends toward the tube axis of the receiving port is formed on the fixing member so as to contact the end surface of the receiving port . Stopper device. A bolt screw hole is opened in the fixing member toward the outer peripheral surface of the receiving port, and a push bolt is screwed into the bolt screw hole to restrict relative movement of the fixing member in the axial direction with respect to the receiving port. plug device for pipe ends of claim 1 or 2, characterized in that it is.

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