JP4675699B2 - Receptacle stopper - Google Patents

Description

  The present invention relates to a receiving plug that at least temporarily blocks a receiving port that constitutes a pipe line, a plug member that is inserted into the inner surface of the receiving port, a fixing member that fixes the plug member at an insertion position, and a plug The present invention relates to a receptacle plug that includes a seal member that seals a gap between the member and the inner surface of the receptacle in a water-tight manner, and an engagement member that holds the stopper member in a fitted state.

  In a conventional receptacle plug, a seal member is disposed in the gap between the end face of the receptacle and the end face of the plug member that is inserted into the receptacle. By utilizing the reaction force of a fixing member fixedly attached to a predetermined position on the outer surface, the stopper member is pressed and held on the end face side of the receiving port to seal the receiving port in a watertight manner (for example, Patent Document 1). reference).

  In another conventional receptacle plug, a convex portion having a diameter smaller than the inner diameter of the receptacle inserted into the inner surface of the receptacle is formed, and the seal member is disposed on the inner surface of the receptacle in the circumferential direction. Thus, the seal member watertightly seals the gap between the outer surface of the convex portion of the plug member and the inner surface of the receiving port inside the receiving port. (For example, refer to Patent Document 2).

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

Utility Model Registration No. 2597594 (1st page, Fig. 2)

  However, in Patent Document 1, a sealing member that is a ring body and seals the receiving port in a watertight manner is disposed at a position where the sealing member comes into contact with the stopper member and the receiving end surface that is outside the receiving port. Since the outer peripheral surface of the seal member is affected by temperature, humidity change or earth pressure, atmospheric pressure, etc. outside the receiving port for a long period of time, the quality of the seal member may deteriorate and the sealing performance may not be maintained. It was.

  Further, in Patent Document 2, since the seal member is inward of the receiving port, deterioration due to an external factor can be avoided. However, when opening the receiving port that is watertightly sealed by the plug member, the receiving port Inside, the convex part of the plug member compresses the seal member in the gap with the inner surface of the receiving port, so that it is not easy to use the pressing member or the reaction force outward of the receiving port in the opening direction. Therefore, it is necessary to open the plug member by using a tool or pressing force or reaction force.

  The present invention has been made paying attention to such problems, and is capable of avoiding deterioration due to external factors of the seal member and enabling a smooth removal operation of the plug member without requiring a tool or the like. The purpose is to provide a stopper.

In order to solve the above-described problem, the receptacle plug according to claim 1 of the present invention is
A plug member having a large-diameter flange portion than the convex portion and the receptacle to be inserted into the receptacle, a fixing member attached taken at a predetermined position of an outer surface of the receptacle, convex portion of said plug member A receiving member comprising: a sealing member for watertightly sealing a gap between the outer surface of the receiving member and the inner surface of the receiving port; and an engaging member for inserting or removing the plug member from the receiving port. There,
The fixing member is
A first fixing member having a first fitting portion along the circumferential direction of the receiving port, and disposed closer to the opening of the receiving port than the first fixing member, and is fitted to the first fitting portion. A second fixing member having a second fitting portion,
The engaging member is
A bolt inserted into a bolt hole provided in the flange portion of the plug member and a fixing bolt hole provided in the flange portion of the second fixing member, with the head portion disposed on the first fixing member side; ,
A first nut screwed into the front side of the bolt inserted through the bolt hole of the bowl-shaped portion;
A second nut screwed into the bolt across the flanged portion with respect to the first nut,
The first fitting portion and the second fitting portion are provided behind the flange portion, and the first fitting portion or the second fitting portion has an end surface with which the head of the bolt abuts. Have
While screwing in and tightening the first nut, the plug member is inserted into the receiving port,
The tightening of the first nut is released, the second nut is screwed out in a state where the head of the bolt is in contact with the first fitting portion or the second fitting portion, and the plug member is It is characterized by being separated from the receptacle .
According to this feature, since the seal member is inward of the receiving port, deterioration due to external factors can be avoided, and the engagement member is the first fitting portion or the second fitting portion constituting the fixing member. Using the reaction force generated by the contact with the plug member, the plug member is detachably operated from the receiving port, so that no plug is required and a special stopper for obtaining the reaction force is not provided. The member can be smoothly detached. Moreover, the reaction force in the case of removing the plug member from the inner surface of the receiving port can be obtained by contacting the head of the bolt with the first fitting portion or the second fitting portion.

The receptacle plug according to claim 2 of the present invention is
A plug member having a convex portion to be inserted into the receptacle, and a hook-shaped portion having a diameter larger than that of the receptacle, a fixing member attached to a predetermined position on the outer surface of the receptacle, and a convex portion of the plug member A receiving plug comprising: a sealing member for watertightly sealing a gap between an outer surface and the inner surface of the receiving port; and an engaging member for inserting or removing the plug member with respect to the receiving port. And
The fixing member is
A first fixing member having a first fitting portion along the circumferential direction of the receiving port, and disposed closer to the opening of the receiving port than the first fixing member, and is fitted to the first fitting portion. A second fixing member having a second fitting portion,
The engaging member is
A bolt inserted into a bolt hole provided in the flange portion of the plug member and a fixing bolt hole provided in the flange portion of the second fixing member, with the head portion disposed on the first fixing member side; ,
A first nut screwed into the front side of the bolt inserted through the bolt hole of the bowl-shaped portion;
A second nut screwed into the bolt across the flanged portion with respect to the first nut,
After the bolt is inserted in the fixing bolt hole in advance, the second fixing member is attached to the outer surface of the receiving port, and then the first fixing member is fitted to the second fixing member. By attaching to the outer surface of the mouth, the first fitting part and the second fitting part are provided in the vicinity of the head of the bolt behind the flange part,
While screwing in and tightening the first nut, the plug member is inserted into the receiving port,
The tightening of the first nut is released, the second nut is screwed out in a state where the head of the bolt is in contact with the first fitting portion or the second fitting portion, and the plug member is It is characterized by being separated from the receptacle .
According to this feature, since the seal member is inward of the receiving port, deterioration due to external factors can be avoided, and the engagement member is the first fitting portion or the second fitting portion constituting the fixing member. Using the reaction force generated by the contact with the plug member, the plug member is detachably operated from the receiving port, so that no plug is required and a special stopper for obtaining the reaction force is not provided. The member can be smoothly detached. With the bolt inserted in the fixing bolt hole in advance, the second fixing member is attached to the outer surface of the receiving port, and then the first fixing member is attached to the outer surface of the receiving port. The bolt can be disposed at a predetermined engagement position without the first fitting portion and the second fitting portion provided at the place being in the way. The reaction force when the plug member is detached from the inner surface of the receiving port can be obtained by bringing the head of the bolt into contact with the first fitting portion or the second fitting portion.

The receptacle plug according to claim 3 of the present invention is the receptacle plug according to claim 1 or 2,
The outer surface in the vicinity of the end of the receiving port is formed as a tapered surface that expands toward the opening of the receiving port, and the first fixing member is in contact with the tapered surface, and the fixing member The movement in the direction of the plug member is prevented.
According to this feature, the first fixing member is in contact with the tapered surface whose outer surface expands toward the opening of the receiving port and is prevented from moving in the direction of the plug member. The plug member can be inserted and operated by reliably utilizing the reaction force of the one fixing member.

The receptacle plug according to claim 4 of the present invention is the receptacle plug according to any one of claims 1 to 3,
An end portion of the second fixing member is formed in an overhang portion that protrudes toward the axial center of the receiving port so as to come into contact with an end surface of the receiving port. The two fixing members are prevented from moving inward in the axial direction of the receptacle.
According to this feature, since the second fixing member is in contact with the end face of the receiving port and the movement of the receiving port in the axial direction is prevented, the engaging member is The stopper member can be detached by reliably utilizing the reaction force of the fixing member.

The receiving plug according to claim 5 of the present invention is the receiving plug according to any one of claims 1 to 4 ,
A plurality of sets of the engaging members including one bolt, one first nut, and one second nut are provided along the circumferential direction of the receiving port. It is said.

The receptacle plug according to claim 6 of the present invention is the receptacle plug according to any one of claims 1 to 5 ,
The bolt is a T-head bolt in which the head is formed in a T shape.
According to this feature, when the first nut or the second nut is screwed or unscrewed, the rotation of the head formed on the T-shape is prevented by contacting the side surface of the second fixing member. Therefore, only the first nut or the second nut can be screwed or unscrewed by the tool without requiring fixing to the head with a special tool such as a spanner.

  Examples of the present invention will be described below.

  Embodiment 1 of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic view showing a pipe member using the receiving plug of the present invention. FIG. 2 is an exploded view of the first embodiment of the present invention with a partial cross-section of the receiving plug. FIG. 3 (a) is a partial cross-sectional view showing a state in which a receiving port is attached to the receiving port, and FIG. 3 (b) is a front view. FIG. 4A is an enlarged cross-sectional view showing a situation where the plug member is removed, and FIG. 4B is a plan view.

  First, as shown in FIG. 1 of the present invention, the receptacle plug 2 according to the present invention avoids an embedded object 3 such as an existing pipe, and forms a flow path such as a water and sewage system. As part of this, it is used to at least temporarily block the flow path and seal the end of the branch pipe in a watertight manner.

  The pipe member 1 is not limited to the flow path at the time shown in FIG. 1, and in many cases has a plan or possibility of expanding or changing the flow path in the future. In addition to the original flow path used at the time shown in FIG. 2, a straight pipe 4 or a T-shaped pipe 5 as a branch pipe is provided in advance, The stopper 2 is attached so that it can be opened.

  Next, the first embodiment will be described below with respect to the insertion and removal of the plug member 10 of the plug 2 for the socket from the receptacle 6.

  As shown in FIG. 2, the receiving plug 2 includes a convex portion 10 a having a diameter slightly smaller than the inner diameter of the receiving port 6 fitted into the inner surface of the receiving port 6, and a flange having a larger diameter than the outer diameter of the receiving port 6. A gap between the outer surface of the convex portion 10a of the stopper member 10 and the inner surface of the receptacle 6; the stopper member 10 having the shape portion 10b; the fixing member 12 fixedly attached at a predetermined position on the outer surface of the receptacle 6; By sealingly engaging the seal member 11 for watertightly with these members as will be described later, the convex portion 10a of the plug member 10 is held in a state of being inserted into the inner surface of the receiving port 6. And an engaging member.

  The fixing member 12 includes a first fixing member 50 having a first fitting portion 51 bulging outward along the circumferential direction on the opening side of the receiving port 6, and closer to the opening of the receiving port 6 than the first fixing member 50. And a second fixing member 55 having a second fitting portion 56 fitted to the first fitting portion 51.

  Further, the inner peripheral surfaces of the first fixing member 50 and the second fixing member 55 are formed to have substantially the same diameter as the outer peripheral surface of the receiving port 6. The first fixing member is formed in a vertically split structure, and is fixed at a predetermined position on the outer surface of the receiving port 6 by a mounting bolt nut 13 inserted through the mounting bolt hole 12d. The second fixing member is formed on the ring body.

  The attachment of the fixing member 12 to the outer surface of the receiving port 6 will be described. The receiving port 6 is configured such that the end portion of the second fixing member 55 located near the opening of the receiving port 6 contacts the end surface 6d of the receiving port 6. The second fixing member 55 is prevented from moving inward in the direction of the axis C of the receiving port 6 by the protruding portion 57 that extends toward the center of the shaft C. Yes.

  In addition, the outer surface of the receiving port 6 at a predetermined position where the first fixing member is attached is formed as a tapered surface 6a that expands toward the opening of the receiving port 6, and the first fixing member that contacts the tapered surface 6a. The inner surface is formed on a tapered surface 52 that expands toward the opening of the receiving port 6 so as to face each other. Therefore, the 1st fixing member contact | abuts to the taper surface 6a, and the movement to the plug member 10 direction is prevented.

  Next, as shown in FIGS. 3 (a) and 3 (b), the engaging member is inserted into the bolt hole 10 c provided in the flange-shaped portion 10 b of the plug member 10 and the flange portion 12 b of the second fixing member 55. A fixing bolt 14 that is inserted through a center axis D of the provided bolt hole 10c and a fixing bolt hole 12c on substantially the same axis with the head portion 14a disposed on the fixing member 12 side, and has a hook shape in the direction of the center axis D The first nut 15 is screwed into the front side of the portion 10b, and the second nut 16 is screwed into the rear side of the bowl-shaped portion 10b. A plurality of the fixing bolts 14, the first nuts 15, and the second nuts 16 are provided at predetermined intervals in the direction substantially parallel to the central axis C direction along the circumferential direction of the receiving port 6 (eight in this embodiment). Has been placed.

  A first fitting portion 51 and a second fitting portion 56 are formed on the rear side of the head 14 a of the fixing bolt 14 in the direction of the central axis D. As shown in FIG. 2, the first fitting portion 51 and the second fitting portion 56 are arranged at a predetermined interval at the rear side of the head 14 a of the fixing bolt 14 so that the bolt can be inserted from the rear into the fixing bolt hole. Since the first fitting portion 51 and the second fitting portion 56 are separated from each other, the fixing bolt 14 is inserted in an oblique direction with respect to the central axis D without being in contact with the head portion 14a. The bolt hole 10c and the fixing bolt hole 12c can be inserted, and the plug member 10 described later can be inserted into and removed from the receiving port 6.

  Moreover, the sealing member 11 which is a ring body having substantially the same diameter as the inner diameter of the receiving port 6 and has elasticity is provided with a convex portion 11 a fitted into a concave portion 6 c 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 plug member 10 and the receiving port 6.

  Next, the operation of inserting the plug member 10 into the receiving port 6 will be described. The fixing bolt 14 and the first nut 15 are screwed into the first nut 15 in a direction close to the head portion 14a of the fixing bolt 14. However, using the reaction force of the fixing member 12, the plug member 10 is pressed to be inserted into the inner surface of the receiving port 6.

  That is, the first fixing member 50 is in contact with the tapered surface 6a whose outer surface expands toward the opening of the receiving port 6, and is prevented from moving in the direction of the plug member 10, and in this way, The engaging member can insert and operate the plug member 10 by reliably using the reaction force of the first fixing member 50.

  The valve portion 11b of the sealing member 11 is compressed in the gap between the outer surface of the convex 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. To seal. The valve portion 11b is pressed by the fixing bolt 14 and the first nut 15, and the state where the gap is sealed is maintained.

  Next, as shown in FIGS. 4A and 4B, the operation of detaching the plug member 10 from the receiving port 6 will be described. The first nut 15 is removed from the fixing bolt 14 and the second nut 16 is fixed. By screwing the bolt 14 away from the head portion 14a, the fixing bolt 14 and the second nut 16 utilize the reaction force generated by the contact between the first fitting portion 51 and the second fitting portion 56. Then, the plug member 10 is pressed so as to be detached from the inner surface of the receiving port 6.

  That is, after the head 14a of the fixing bolt 14 comes into contact with the end surface 51a of the first fitting portion 51, the second nut 16 is further rotated to project toward the center axis C center of the receiving port 6. The overhanging portion 57 of the second fixing member 55 that comes into contact with the end surface 6d of the receiving port 6 prevents the second fixing member 55 from moving in the inner direction of the second fixing member 55 in the central axis C direction. By doing so, the engaging member can use the reaction force of the second fixing member 55 to reliably insert and operate the plug member 10.

  Further, by doing so, since the seal member 11 is inside the receiving port 6, deterioration due to an external factor can be avoided, and the engaging member is the first fitting portion constituting the fixing member 12. 51. The plug member 10 is detachably operated from the receiving port 6 by utilizing the reaction force generated by the contact with the first fitting portion 51 or the second fitting portion 56, so that a reaction force can be obtained without requiring a tool or the like. Smooth disengagement of the plug member 10 is possible without providing a special stopper or the like.

  In the present embodiment, the head 14 a of the fixing bolt 14 is in contact with the end surface 51 a of the first fitting portion 51, but the engaging member obtains a reaction force for detaching the plug member 10. The part may be any part of the first fitting part 51 or the second fitting part 56.

  In particular, as shown in FIG. 4B, the second fitting portion 56 is formed so as to protrude in a convex shape over the entire circumferential direction of the receiving port 6, whereas the second fitting portion 56. The first fitting portion 51 to be fitted with is formed only at a predetermined location (in this embodiment, two locations at the top and bottom in a total of four locations) along the circumferential direction of the receiving port 6. Accordingly, among a plurality (eight in this embodiment) of engaging members formed along the circumferential direction of the receiving port 6, some of the required engaging members (in this embodiment, up and down) Only two of them (two in total) come into contact with the end surface 51a of the first fitting portion 51 formed at the predetermined location, and the wire member 10 is detached.

  By doing in this way, among the engaging members formed in a plurality along the circumferential direction of the receiving port 6, at least necessary for pressing the plug member 10 so as to be detached from the inner surface of the receiving port 6. Corresponding to only one engagement member, the first fitting portion 51 or the second fitting portion 56 may be formed along the circumferential direction of the receiving port 6. It is not necessary to be formed over.

  The fixing bolt 14 of this embodiment is a so-called T-head bolt in which the head portion 14a is formed in a T shape, and when the first nut 15 or the second nut 16 is screwed in or screwed out as described above. Since the rotation of the head portion 14a formed in the T shape is prevented by contacting the side surface of the second fixing member 55, the head portion 14a needs to be fixed with a special tool such as a spanner. Instead, only the first nut 15 or the second nut 16 can be screwed or unscrewed by the tool.

  Further, as shown in FIG. 3 (b), the plug member 10 of the present embodiment has a 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 detachably and watertightly screwed. 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.

  Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is an exploded view of the second embodiment of the present invention with a partial cross-section of the receptacle plug. FIG. 6A is an enlarged cross-sectional view showing a situation where the plug member is removed, and FIG. 6B is a plan view. The description of the same configuration as that of the first embodiment is omitted.

  As shown in FIG. 5, the engaging member in the second embodiment has substantially the same configuration as that of the first embodiment, and the first fitting portion 51 ′ and the second fitting portion formed in the first fixing member 50 ′. The second fitting portion 56 ′ formed on the fixing member 55 ′ is different in that it is located closer to the rear side of the head 14 a of the fixing bolt 14.

  Then, as shown in FIG. 5, with the fixing bolt 14 inserted in advance into the fixing bolt hole 12c, the second fixing member 55 ′ is attached to the outer surface of the receiving port 6, and then the first fixing member 50 ′ is attached. The first fitting portion 51 ′ and the second fitting portion 56 ′ are attached to the outer surface of the receiving port 6 in a state where the first fitting portion 51 ′ and the second fitting portion 56 ′ are fitted.

  By doing in this way, 1st fitting part 51 'and 2nd fitting part 56' provided in the location close | similar to the back side of the head 14a of the fixing bolt 14 do not become obstructive, but the fixing bolt 14 Can be arranged at a predetermined engagement position. And the reaction force in the case of removing the plug member 10 from the inner surface of the receiving port 6 is obtained by contacting the head 14a of the fixing bolt 14 with the first fitting portion 51 ′ or the second fitting portion 56 ′. Can do.

  The operation of inserting and removing the plug member 10 from the receiving port 6 will be described. Similarly to the above-described first embodiment, the first nut 15 is screwed in a direction close to the head 14a of the fixing bolt 14. The fixing bolt 14 and the first nut 15 are pressed to insert the plug member 10 into the inner surface of the receiving port 6. On the contrary, as shown in FIG. 6, by screwing the second nut 16 in a direction away from the head 14 a of the fixing bolt 14, the fixing bolt 14 and the second nut 16 receive the plug member 10. The pressing operation is performed so as to separate from the inner surface of 6.

  In particular, in the case of the present embodiment, the first fitting portion and the second fitting portion are provided at predetermined positions of the fixing member 22 close to the rear side of the head portion 14a of the fixing bolt 14, and the second nut When screwing 16 in a direction away from the head 14a of the fixing bolt 14, the head 14a immediately comes into contact with the end face 51a 'of the first fitting portion 51' formed at a close position. Using the reaction force generated by the contact, the stopper member 10 can be pressed so as to be detached from the inner surface of the receiving port 6.

  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 said Example, the 2nd fitting part is formed so that it may bulge in convex shape along the circumferential direction of a receptacle, and the 1st fitting part bulges in this convex shape. However, the shape of the first fitting portion and the second fitting portion is not limited to the present embodiment. For example, the second fitting portion may be a second fitting portion. The fitting portion is formed in a concave shape along the circumferential direction of the receiving port, and the first fitting portion is formed in a convex shape so as to be unevenly provided on the second fitting portion formed in the concave shape. May be.

  Moreover, in the said Example, the outer surface of the receptacle 6 is formed in the taper surface 6a which expands toward the opening of the receptacle 6, and a 1st fixing member contact | abuts to the taper surface 6a and goes to the plug member 10 direction. However, if the movement of the first fixing member is prevented, the shape of the outer surface of the receiving port is not limited to the tapered surface 6a. For example, the outer surface at the end of the receiving port is , Formed in parallel with the central axis C of the receiving port 6, a part of the outer surface bulges into the convex portion along the circumferential direction, and the first fixing member comes into contact with the convex portion, thereby The movement of one fixing member may be prevented.

  Moreover, in the said Example, the inner surface of the 1st fixing member contact | abutted with the taper surface 6a formed in the outer surface of the receptacle 6 is expanded toward the opening of the receptacle 6 so that it may oppose the taper surface 6a. Although the taper surface 52 is formed, the inner surface of the first fixing member may not necessarily be formed on the taper surface 52 as long as the movement of the first fixing member is prevented. It may be formed parallel to the central axis C.

It is the schematic which shows the pipe line member using the stopper for receptacles of this invention. It is the assembly exploded view which gave the partial cross section of the stopper plug in 1st Example of this invention. (A) is a partial sectional view which shows the state which similarly attached the stopper plug to the receptacle, (b) is also a front view. (A) is the expanded sectional view which similarly showed the condition which removes a plug member, (b) is a top view similarly. It is the assembly exploded figure which gave the partial cross section of the stopper plug in 2nd Example of this invention. (A) is the expanded sectional view which similarly showed the condition which removes a plug member, (b) is a top view similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe line member 2 Receptacle plug 3 Buried object 4 Straight pipe 5 T-shaped pipe 6 Receptacle 6a Tapered surface 6c Recessed part 6d End surface 10 Plug member 10a Convex part 10b Gutter part 10c Bolt hole 10d Drain hole 10e Air vent hole 11 Seal member 11a Convex part 11b Valve part 12 Fixing member 12b Ridge part 12c Fixing bolt hole 12d Fixing bolt hole 13 Fixing bolt nut 14 Fixing bolt (bolt)
14a head 15 first nut 16 second nut 22 fixing member 40, 41 plug 50, 50 ′ first fixing member 51, 51 ′ first fitting portion 51a, 51a ′ end surface 52 taper surface 55, 55 ′ second fixing Members 56, 56 ′ Second fitting portion 57 Overhang portion C, D Center axis

Claims (6)

A plug member having a large-diameter flange portion than the convex portion and the receptacle to be inserted into the receptacle, a fixing member attached taken at a predetermined position of an outer surface of the receptacle, convex portion of said plug member A receiving member comprising: a sealing member for watertightly sealing a gap between the outer surface of the receiving member and the inner surface of the receiving port; and an engaging member for inserting or removing the plug member from the receiving port. There,
The fixing member is
A first fixing member having a first fitting portion along the circumferential direction of the receiving port, and disposed closer to the opening of the receiving port than the first fixing member, and is fitted to the first fitting portion. A second fixing member having a second fitting portion,
The engaging member is
A bolt inserted into a bolt hole provided in the flange portion of the plug member and a fixing bolt hole provided in the flange portion of the second fixing member, with the head portion disposed on the first fixing member side; ,
A first nut screwed into the front side of the bolt inserted through the bolt hole of the bowl-shaped portion;
A second nut screwed into the bolt across the flanged portion with respect to the first nut,
The first fitting portion and the second fitting portion are provided behind the flange portion, and the first fitting portion or the second fitting portion has an end surface with which the head of the bolt abuts. Have
While screwing in and tightening the first nut, the plug member is inserted into the receiving port,
The tightening of the first nut is released, the second nut is screwed out in a state where the head of the bolt is in contact with the first fitting portion or the second fitting portion, and the plug member is A stopper for a receptacle characterized by being separated from the receptacle.   A plug member having a convex portion to be inserted into the receptacle, and a hook-shaped portion having a diameter larger than that of the receptacle, a fixing member attached to a predetermined position on the outer surface of the receptacle, and a convex portion of the plug member A receiving plug comprising: a sealing member for watertightly sealing a gap between an outer surface and the inner surface of the receiving port; and an engaging member for inserting or removing the plug member with respect to the receiving port. And
  The fixing member is
  A first fixing member having a first fitting portion along the circumferential direction of the receiving port, and disposed closer to the opening of the receiving port than the first fixing member, and is fitted to the first fitting portion. A second fixing member having a second fitting portion,
  The engaging member is
  A bolt inserted into a bolt hole provided in the flange portion of the plug member and a fixing bolt hole provided in the flange portion of the second fixing member, with the head portion disposed on the first fixing member side; ,
  A first nut screwed into the front side of the bolt inserted through the bolt hole of the bowl-shaped portion;
  A second nut screwed into the bolt across the flanged portion with respect to the first nut,
  After the bolt is inserted in the fixing bolt hole in advance, the second fixing member is attached to the outer surface of the receiving port, and then the first fixing member is fitted to the second fixing member. By attaching to the outer surface of the mouth, the first fitting part and the second fitting part are provided in the vicinity of the head of the bolt behind the flange part,
  While screwing in and tightening the first nut, the plug member is inserted into the receiving port,
  The tightening of the first nut is released, the second nut is screwed out in a state where the head of the bolt is in contact with the first fitting portion or the second fitting portion, and the plug member is A stopper for a receptacle characterized by being separated from the receptacle. The outer surface in the vicinity of the end of the receiving port is formed as a tapered surface that expands toward the opening of the receiving port, and the first fixing member is in contact with the tapered surface, and the fixing member The receptacle plug according to claim 1 or 2 , wherein movement toward the stopper member is prevented. An end portion of the second fixing member is formed in an overhang portion that protrudes toward the axial center of the receiving port so as to come into contact with an end surface of the receiving port. The receptacle stopper according to any one of claims 1 to 3 , wherein the two fixing members are prevented from moving inward in the axial direction of the receptacle. 2. A plurality of sets of the engagement members including one bolt, one first nut, and one second nut are provided along the circumferential direction of the receiving port. The stopper plug according to any one of 4 to 4 .   The receptacle plug according to claim 1, wherein the bolt is a T-head bolt in which the head is formed in a T shape.

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