JP4853669B2 - Flange connector and flange connector connection method - Google Patents

Description

  The present invention relates to a flange connector used for connecting, for example, a high-frequency coaxial cable and various gas pipes, and a method of connecting the flange connector.

Conventionally, this type of flange connector is used in, for example, a connection part in a high-frequency coaxial cable, a connection part of various gas pipes, and the like.
FIG. 9 is a diagram showing an example of a conventionally proposed high-frequency coaxial cable connector, and FIG. 10 is a diagram showing an outline of a connection operation performed during the connection work.

  This high-frequency coaxial cable connector basically conforms to the regulations of EIAJ TT-3005A, as with other coaxial cable connectors. In the connection work, the flange connector 100a to which the high-frequency coaxial cable 101a is connected and the flange connector 100b to which the high-frequency coaxial cable 101b is connected are packed (also referred to as O-ring or sealing material) 103 between them. The outer body 106a, 106b, which is a so-called body part, is connected to the packing 103, the insulator 104, and the anchor connector 105 by interposing an anchor connector 105 (or a phase adjusting connecting device) provided with the insulator 104. The internal conductors 107a and 107b are connected to the anchor connector 105 while being enclosed in the interior (FIG. 10A).

Then, the flange connector 100a and the flange connector 100b are hermetically sealed by fastening with a plurality of sets of bolts 109, washers 110, spring washers 111, and nuts 112 in a state where the rotary flange 108a and the rotary flange 108b are abutted. Or in a watertight state). In FIG. 9 and FIG. 10, only one set of bolts 109 and the like is drawn for the sake of simplicity, and the others are omitted (FIG. 10B).

  More specifically, the main part of the flange connector 100 includes a rotating flange 108, an outer body 106, a stop ring 102, and an inner conductor 107. The stop ring 102 is engaged and locked in both the groove-shaped recess 113 of the outer body 106 and the groove-shaped recess 114 of the rotary flange 108, thereby deviating from a predetermined position near the front end side of the outer body 106. The rotating flange 108 is assembled so that there is nothing.

In the outer body 106, the packing 103 is received by the recess 115 provided on the front end side, and the insulator 104 is received in the recess 116 on the inner peripheral side, and a flat portion that is a protrusion between the recess 115 and the recess 116. The foremost surface 117 is set so as to face the same part of the other party to be connected and be brought into contact with each other without a gap.
The inner conductor 107 has a so-called connector structure to which the anchor connector 105 is connected. A hole 118 of the rotating flange 108 is set so that a fastening bolt 109 is inserted.
A sealing material 119 is used as necessary at the connecting portion between each flange connector 100 and each high-frequency coaxial cable 101, and the sealing performance of that portion is further ensured.

  According to the flange connector having such a configuration, a plurality of types of anchor connectors 105 integrated with the insulator 104 are prepared, and an optimum type of anchor connector 105 corresponding to a desired frequency to be adjusted can be easily obtained. It is possible to select and use (Patent Document 1).

Japanese Patent Laid-Open No. 2005-175792

By the way, in the conventional flange connector as described above, for example, when the connection work is performed in a place where the working environment is severe such as a place where the outdoor scaffolding is bad or on a ship with shaking, etc. For example, if the bolt 109 or the like is tightened as it is in a state of being partially deviated or twisted from the concave portion 115 without being able to be reliably stored in the position of 115, there is a possibility that a sufficient sealed state cannot be obtained. There is.
Moreover, since it is practically extremely difficult or impossible to check during operation whether or not such packing 103 is misaligned, poorly accommodated, etc., with the flange connector having the conventional structure as described above. There is also a risk of oversight without obtaining a sufficient sealed state.
In addition to the high-frequency coaxial cable connector as described above, for example, a flange connector used for connecting various gas pipes is also caused by oversight of misalignment, poor accommodation, twisting, etc. of the packing 103 as described above. There is a possibility that a sufficient sealed state cannot be obtained.

  The present invention has been made in view of such problems, and its object is to provide the flange connector 100 in a state in which the packing 103 is securely disposed and accommodated at a predetermined position such as the concave portion 115 of the outer body 106 during connection work. To provide a flange connector that can be connected to each other, and as a result, for example, a connection portion in a high-frequency coaxial cable and various gas pipes can be surely brought into a sufficiently sealed state, and a connection method using the same. is there.

Flange connector of the present invention is connected to the other flange connector having a structure of the same type are butted so as to face via a packing, a cylindrical outer shell body, the outer peripheral surface of the body the shell An annular rotary flange provided in a part and movable back and forth with respect to the outer shell body, a groove formed on an outer peripheral surface of a rear end side of the outer shell body, and attached to the groove, the rotary flange And a drop-off prevention ring for preventing the outer shell body from falling off , wherein the outer shell body is fitted with the packing on the front end side which is abutted against the other flange connector. includes a recess, a flat foreground to be butted to face to the other flange connector, the outward flange portion for locking protruding in a centrifugal direction from a portion of the outer peripheral surface of this outer shell body Cage, large inner diameter the rotary flange, with said outer with the shell body is formed separately, the outer shell body of the inner diameter larger than the diameter of the located to the front side the locking outward flange portion And an inner diameter greater than the diameter of the outer shell body and equal to or less than the diameter of the outward flange portion for locking, and more concentric than the inner peripheral surface of the large inner diameter portion and a flared locking inward flange portion, the front Symbol locking outward flange portion, engages said locking inward flange portion, the large diameter portion, the rotary flange said shell It is characterized in that it is in a state of being fitted to the locking outward flange portion between the locking outward flange portion that can move back and forth with respect to the body and the drop-off preventing ring .
Further, the flange connector connection method of the present invention is provided in a cylindrical outer shell body and a part of the outer peripheral surface of the outer shell body, an annular rotary flange that can move back and forth with respect to the outer shell body , Two flange connectors having a groove formed on the outer peripheral surface on the rear end side of the outer shell body, and a drop-off prevention ring attached to the groove and preventing the rotating flange from dropping from the outer shell body A flange connector connection method in which the two are connected to each other via a packing, and the outer shell body is respectively connected to the other flange connector as the two flange connectors. A concave portion in which the packing is fitted and a flat frontmost surface that is abutted against the other flange connector, and a centrifugal direction from a part of the outer peripheral surface of the outer shell body The overhanging previously formed to include a outward flange portion for locking, and the rotation flange, and the outer shell body separately, for the locking located on the top front side of the outer shell body A large inner diameter portion having an inner diameter larger than the diameter of the outward flange portion, an inner diameter adjacent to the large inner diameter portion and larger than the diameter of the outer shell body and equal to or smaller than the diameter of the outward flange for locking. It formed aft and to comprise a locking inward flange portion of the inner peripheral surface overhanging centripetal direction of the large diameter portion, the said rotary flange in a state with its the large inner diameter portion in the traveling direction front When the outer shell body is inserted from the rear end side opposite to the front end side to the front end side, the locking inward flange portion is locked by the locking outward flange portion of the outer shell body. And the rotating flange is connected to the outer shell body. And between said falling prevention ring and the locking outward flange portion movable back and forth, have set up the large inner diameter portion such that in a state fitted to the outward flange portion for the locking, The packing is accommodated in the recess, and the rotary flange is retracted to the rear end side, so that the packing is not covered with the rotary flange and is visible from the outside. butt front ends of the shell body, before Symbol go the rotary flange being directed in the traveling direction front large diameter portion is moved to the front side of the body the outer shell, inward flange portion for the engagement The two flange connectors are connected in a state of being locked by the locking outward flange portion of the outer shell body.
The flange connector according to the present invention is a connector in which the outer shell body is provided with a connection part that is connected to an external cable on the rear end side, and is electrically connected to another flange connector of the same type. If the structure is provided inside, it can be suitably used as one used for connecting cables.
Alternatively, if the outer shell body includes a connection part connected to an external gas pipe on the rear end side, and a flow path continuous with the gas pipe inside, the gas pipe is connected. It can use suitably as what is used for.

  According to the present invention, the outer shell body is provided with a recess into which the packing is fitted and a flat frontmost surface that is faced against the other flange connector, on the front end side faced against the other flange connector. In addition, the outer shell body itself is provided with a locking outward flange portion projecting in a centrifugal direction from a part of the outer peripheral surface of the outer shell body itself, and the rotating flange is formed separately from the outer shell body for locking. A large inner diameter portion having an inner diameter larger than the diameter of the outward flange portion, and a large inner diameter portion adjacent to the larger inner diameter portion and having an inner diameter larger than the diameter of the outer shell body and not more than the diameter of the outward flange for locking And an inward flange portion for locking projecting in the centripetal direction from the inner peripheral surface of the outer flange, with the large inner diameter portion facing the front side in the traveling direction, the rotating flange is opposite to the front end side of the outer shell body Insert from the rear end to the front end It was inward flange portion for gradually when locking and is engaged by the locking outward flange portion of the outer shell body, and rotating flange constituted the flange connector so as to be movable back and forth relative to the outer shell body. As a result, it is possible to check whether the packing is housed in the correct position in the correct position without being displaced or twisted, while confirming visually, etc., or after checking As a result, the connection portion using the flange connector can be reliably sealed without fear of occurrence of packing accommodation failure or oversight.

Hereinafter, a flange connector and a method of connecting the flange connector according to the present embodiment will be described with reference to the drawings.
1 is a diagram showing a schematic configuration of the entire flange connector according to the present embodiment, FIG. 2 is an exploded view of the flange connector shown in FIG. 1 into an outer shell body and a rotating flange, FIG. 3 and FIG. 4 is a diagram showing a state during connection work when the flange connector according to the present embodiment is used as a flange connector for high-frequency cable connection, and FIG. 5 is a double-flange connector according to the connection work shown in FIG. 3 and FIG. It is a figure which shows the state by which was connected. FIGS. 6 and 7 are diagrams showing a connection operation when the flange connector according to the present embodiment is used as a flange connector for gas pipe connection, and FIG. 8 is shown in FIGS. 6 and 7. It is a figure which shows the state by which both flange connectors were connected by the connection operation | work.

Each flange connector 1 (for example, 1a in FIGS. 3, 4, and 5) is replaced with another flange connector 1 (for example, 1b in FIGS. 3, 4, and 5) having the same structure as shown in FIG. ) With a moderate flexibility and weather resistance and a high sealing property, but the outer shape is almost a cylinder that is abutted and connected to face each other via a packing 5 made of a material such as a synthetic rubber for sealing. The outer shell body 2 and a rotating flange 3 having a substantially annular outer shape are provided. A flexible covered electric wire such as a high-frequency coaxial cable 6 or a flexible material is provided on the rear end side of the outer shell body 2. A connecting component 4 for connecting a gas pipe 14 made of the like is provided.

  The outer shell body 2 includes a locking outward flange portion 21 provided so as to project in a centrifugal direction from a part of the outer peripheral surface of the outer shell body 2 and is abutted against the other flange connector 1. On the front end side, a recess 22 set so that the packing 5 is fitted and a flat frontmost surface 23 facing the other flange connector 1 are provided. Further, when the flange connector 1 is used for connection of the gas pipe 14, the cavity 24 inside the outer shell body 2 is a flow path through which gas flows continuously with the gas pipe 14, In the case of being used for connection of a high-frequency coaxial cable, the cavity 24 is a recess for accommodating the insulator 81 and is electrically connected to the other flange connector 1 of the same type in the cavity 24. A connector structure 7 to be connected to is provided. A groove 25 is provided in the outer shell body 2 at a predetermined position closer to the rear end side than the position at which the rotary flange 3 can be most retracted. The groove 25 has an appropriate elasticity such as butyl rubber and the like. A drop-off prevention ring 34 made of a material having strength is fitted. This drop prevention ring 34 is for preventing the rotary flange 3 from moving backward further and dropping off from the outer shell body 2.

The rotating flange 3 is separate from the outer shell body 2, has a large inner diameter portion 32 having an inner diameter larger than the diameter of the locking outward flange portion 21, and is larger than the diameter of the outer shell body 2 and is locked outward. A locking inward flange portion 31 is provided which has an inner diameter equal to or smaller than the diameter of the flange 21 and protrudes in the centripetal direction (that is, inward) from the inner peripheral surface of the large inner diameter portion 32. The locking inward flange portion 31 is set to be locked to the locking outward flange portion 21 of the outer shell body 2. The rotating flange 3 is provided with a plurality of holes 33 penetrating in the front-rear direction through which the bolts 9 can be inserted. In FIG. 1 to FIG. 5, only one set of the bolt 9, the washer 10, the spring washer 11, and the nut 12 is drawn for the sake of simplicity, and the others are omitted.
The length D of the large inner diameter portion 32 is desirably set so as to be smaller than the length d ₁ from the forefront surface 23 to the rear end of the locking outward flange portion 21 (D <d ₁ ). As a result, the flange connectors 1a and 1b are connected to each other with the bolt 9 and the nut 12 in a state where the locking inward flange portions 31a and 31b provided on the rotary flanges 3a and 3b are locked to the locking outward flange portions 21a and 21b. Etc. can be used for connection. Therefore, the forefront surfaces 23a and 23b provided on the flange connectors 1a and 1b can be connected to each other, and after the flange connectors 1a and 1b are connected, the rotary flanges 3a and 3b are connected to the outer shell body 2a and 2b. On the other hand, it does not move back and forth.
Further, it is desirable that the length D of the large inner diameter portion 32 is set so as to be equal to or longer than the length d _{2 of the} locking outward flange portion 21 (d ₂ ≦ D). Thereby, when confirming whether the packing 5 is accommodated in a predetermined position between the rotary flanges 3a and 3b, the rotary flanges 3a and 3b are respectively shown as rear end sides (in FIG. 2, arrows "rear end side"). ), The large inner diameter portion 32 is fitted to the locking outward flange portion 21. After confirming that the packing 5 is accommodated in this state, the rotary flanges 3a and 3b are respectively connected to the front end side ( The rotation flanges 3a and 3b can be brought into contact with each other only by moving to the arrow “front end side” in FIG. 2, and the connection work can be performed easily and reliably.
When the rotary flange 3 is inserted from the rear end side opposite to the front end side of the outer shell body 2 with the large inner diameter portion 32 directed to the front side in the traveling direction, finally, the rotation flange 3 is finally inserted. The locking inward flange portion 31 (the front facing surface thereof) is set to be locked by the locking outward flange portion 21 (the rear end facing surface) of the outer shell body 2. Further, the rotary flange 3 is set to be movable back and forth with respect to the outer shell body 2 by a distance that is at least the length of the large inner diameter portion 32 longer than the length of the outward flange portion 21 for locking. . The forward / backward movement of the rotary flange 3 is stopped by the locking outward flange portion 21 of the outer shell body 2 in the forward direction and stopped by the drop-off prevention ring 34 in the rear direction as described above.

  When such a flange connector 1 is set so as to be used for connecting a high-frequency coaxial cable, the connection work state as shown in FIGS. A connection that realizes a tightly sealed (watertight) state is made.

That is, as shown in FIG. 3, between the two flange connectors 1a and 1b to which the high-frequency coaxial cables 6a and 6b are connected, the phase adjusting connecting device 8 including the insulator 81 and the anchor connector 82, and the like, Those parts are prepared so that the packing 5 is interposed.
Then, as shown in FIG. 4, the packing 5 at the front end of the outer shell body 2a, 2b is accommodated by moving the rotary flanges 3a, 3b back to the rear end side of the outer shell body 2a, 2b. The vicinity of the portion to be formed can be visually confirmed from the outside, and the outer shell body 2a and the outer shell body 2a are maintained while maintaining the state in which the packing 5 is reliably accommodated in the recesses 22a and 22b of the outer shell bodies 2a and 2b. 2b. At this time, the movement of the rotary flanges 3a and 3b in the backward direction is substantially stopped by the drop-off prevention ring 34. Therefore, the rotary flange 3 is moved backward further by the drop-off prevention ring 34 and the outer shell body 2 is moved backward. Is prevented from falling off.

If it can be confirmed that the packing 5 is correctly accommodated in the recesses 22a and 22b in this way, then the rotary flanges 3a and 3b are moved to the front end sides of the outer shell bodies 2a and 2b, respectively. Go. In this movement, the locking inward flange portions 31a and 31b are finally locked by the locking outward flange portions 21a and 21b of the outer shell bodies 2a and 2b, respectively, so that the forward movement is stopped. Continue until. If the packing 5 is housed in the recesses 22a and 22b in the correct position and posture when the movement is stopped, the rotating flange 3a and the rotating flange 3b are abutted against each other without a gap. It is set to become.
Alternatively, when the outer shell bodies 2a and 2b are abutted with each other, the packing 5 is not properly accommodated in the recesses 22a and 22b as a result of visual confirmation. Is confirmed to have deviated or twisted from the recesses 22a and 22b, after the abutting operation is interrupted and the packing 5 is properly accommodated in the recesses 22a and 22b. Then, the matching operation is performed again.

Then, as shown in FIGS. 4 to 5, the bolt 9 is inserted into the holes 33 a and 33 b provided so as to penetrate the rotary flanges 3 a and 3 b in the front-rear direction, and the nut 12 is attached together with the washer 10 and the spring washer 11. By performing the so-called bolt fastening used, the rotating flanges 3a and 3b are fixed in contact with each other, and the substantial main part of the connecting operation between the flange connector 1a and the flange connector 1b is completed.
Thereafter, the connecting portion between each flange connector 1 and the high-frequency coaxial cable 6 (that is, in the vicinity of the connecting component 4) is excellent in insulation and weather resistance as necessary to further ensure the sealing performance of the portion. Sealing is performed using a sealing material 119 made of a resin of a different material.

  When the flange connector 1 is set so as to be used for connecting various gas pipes, it is surely sealed through the connection work state as shown in FIGS. Connections that realize the (airtight) state are made.

That is, as shown in FIG. 6, first, two flange connectors 1a, 1b, packing 5, and plural sets of fastening parts (bolts 9, washers 10, spring washers 11, nuts) to which the gas pipes 14a, 14b are connected, respectively. 12) is prepared.
Then, as shown in FIG. 7, the packing 5 at the front end of the outer shell body 2a, 2b is accommodated by moving the rotary flanges 3a, 3b back to the rear end side of the outer shell body 2a, 2b. The outer periphery of the outer shell body 2a and the outer shell body 2b of the outer shell body 2a and 2b are visually confirmed to be received in the recesses 22a and 22b. Match 2a and 2b. At this time, the movement of the rotary flanges 3a and 3b in the backward direction is substantially stopped by the drop-off prevention ring 34. Therefore, the rotary flange 3 is moved backward further by the drop-off prevention ring 34 and the outer shell body 2 is moved backward. It is exactly the same as the case of connecting a high-frequency coaxial cable that it is prevented from falling off.

At this time, when it can be confirmed that the packing 5 is properly accommodated in the recesses 22a and 22b, the rotary flanges 3a and 3b are then placed with the large inner diameter portions 32a and 32b facing the front in the traveling direction. , And move to the front end side of the outer shell body 2a, 2b, respectively. In this movement, the locking inward flange portions 31a and 31b are finally locked by the locking outward flange portions 21a and 21b of the outer shell bodies 2a and 2b, respectively, so that the forward movement is stopped. Continue until. If the packing 5 is housed in the recesses 22a and 22b in the correct position and posture when the movement is stopped, the rotating flange 3a and the rotating flange 3b are brought into contact with each other without a gap. . The main part of such connection work is exactly the same as in the case of connecting a high-frequency coaxial cable.
Alternatively, when the outer shell bodies 2a and 2b are abutted with each other, the packing 5 is not accommodated in the correct state in the recesses 22a and 22b. For example, a part of the packing 5 is partially recessed in the recess 22a. , 22b is confirmed to be deviated or twisted, the abutting operation at that time is interrupted, the packing 5 is restored to the state of being correctly accommodated in the recesses 22a, 22b, and then again. Do the matching process.

  Then, as shown in FIGS. 7 to 8, the bolt 9 is inserted into the holes 33 a and 33 b provided so as to penetrate the rotary flanges 3 a and 3 b in the front-rear direction, and the nut 12 is attached together with the washer 10 and the spring washer 11. The so-called bolt fastening used is performed to complete substantially the main procedure of the connection work between the flange connector 1a and the flange connector 1b.

According to the flange connector and the connection method of the flange connector according to the present embodiment as described above, the rotating flange 3 is separated from the outer shell body 2 and the large inner diameter portion 32 faces the front in the traveling direction. When the rotating flange 3 is inserted from the rear end side opposite to the front end side of the outer shell body 2 to the front end side, the inward flange portion 31 for locking finally becomes the locking member for the outer shell body 2. It will be in the state where two rotating flanges 3 were faced | matched while it was latched by the outward flange part 21. FIG. Further, movable in its longitudinal direction rotation flange 3 relative to the outer shell body 2 since the set so that the length D of at least the large diameter portion 32 is a length d ₂ or more locking outward flange portion 21 The space between the two rotating flanges 3 can be opened. For this reason, the connecting work is performed while checking whether or not the packing 5 is housed in the correct position in the recess 22 without being displaced or twisted from the correct position of the recess 22 or by matching. As a result, the connecting portion using the flange connector 1 can be surely brought into a sufficiently sealed state (watertight or airtight) without the possibility of the packing 5 being poorly accommodated and overlooked. It becomes possible.

Further, in the flange connector according to the present embodiment, since the rotary flange 3 is separated from the outer shell body 2, the rotary flange 3 can be attached to and detached from the outer shell body 2. Accordingly, for example, a plurality of different types of materials, outer dimensions, fixing methods, etc. are prepared as the rotating flange 3, and the optimum type is selected and used as appropriate according to the needs and requirements of the application destination. It is possible to obtain a secondary merit such as being possible. Alternatively, it is possible to replace only the part of the rotary flange 3 in particular. For example, particularly when the rotary flange 3 is significantly deteriorated or deteriorated, the deterioration is not required without replacing the entire flange connector. A secondary merit that only the rotating flange 3 needs to be replaced can be obtained.

In the above-described embodiment, the case where the bolt fastening method using the bolt 9 or the like is employed as the means for fixing the rotating flanges 3 in a state of abutting each other has been described. It is also possible to use the method of the method.
Moreover, as a high-frequency coaxial cable that can be manually connected using this flange connector, in addition to those using the phase adjustment connecting device 8 as described above, those using an anchor connector having no phase adjustment function are also possible. Of course there is.
Needless to say, the flange connector and the connection method thereof according to the present embodiment can be applied even when other than the high-frequency coaxial cable or the gas pipe is connected.

It is a figure which shows the main structures of the whole flange connector which concerns on this Embodiment. It is a figure which decomposes | disassembles and shows the flange connector shown in FIG. 1 to an outer shell body and a rotation flange. It is a figure which shows the state at the time of the connection operation in the case of using the flange connector which concerns on this Embodiment as a flange connector for a high frequency cable connection. FIG. 4 is a diagram illustrating a state at the time of connection work when the flange connector according to the present embodiment is used as a flange connector for connecting a high-frequency cable, following FIG. 3. It is a figure which shows the state in which both the flange connectors were connected by the connection operation | work as shown in FIG. 3, FIG. It is a figure which shows the state at the time of the connection operation in the case of using the flange connector which concerns on this Embodiment as a flange connector for gas pipe connections. FIG. 7 is a diagram illustrating a state at the time of connection work in the case where the flange connector according to the present embodiment is used as a flange connector for high-frequency cable connection following FIG. 6. It is a figure which shows the state which both the flange connectors were connected by the connection operation | work as shown in FIG. 6, FIG. It is a figure which shows an example of the high frequency coaxial cable connector conventionally proposed. It is a figure which shows the state at the time of the connection operation performed at the time of the connection operation | work of the high frequency coaxial cable connector shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flange connector 2 Outer shell body 3 Rotating flange 4 Connection part 5 Packing 6 High frequency coaxial cable 7 Connector structure 9 Bolt 10 Washer 11 Spring washer 12 Nut 22 Recess 34 Fall-off prevention ring

Claims (3)

A cylindrical outer shell body that is connected to face to face with another flange connector having the same type of structure via a packing ;
An annular rotating flange provided on a part of the outer peripheral surface of the outer shell body and movable back and forth with respect to the outer shell body ;
A groove formed on the outer peripheral surface on the rear end side of the outer shell body;
A drop-off prevention ring that is attached to the groove and prevents the rotating flange from falling off the outer shell body;
A flange connector comprising:
Said shell body is the front end that is matched to the other flange connector, and a recess in which the packing is fitted, a flat foreground to be butted to face to the other flange connector, those outer An outward flange portion for locking protruding in a centrifugal direction from a part of the outer peripheral surface of the shell body,
The rotating flange is formed separately from the outer shell body, and is located on the forefront side of the outer shell body and has a large inner diameter portion having an inner diameter larger than the diameter of the outward flange portion for locking. , Which is adjacent to the large inner diameter portion and has an inner diameter which is larger than the diameter of the outer shell body and equal to or smaller than the diameter of the outward flange portion for locking, and projects in a centripetal direction from the inner peripheral surface of the large inner diameter portion. And an inward flange portion for locking,
Before SL locking outward flange portion, engages said locking inward flange portion,
The large inner diameter portion is in a state of being fitted to the locking outward flange portion between the locking outward flange portion and the drop-off preventing ring, in which the rotating flange is movable back and forth with respect to the outer shell body. flange connector according to claim <br/> that is. The flange connector according to claim 1, wherein
A flange connector characterized in that a length D of the large inner diameter portion is smaller than a length d ₁ from the forefront surface of the outer shell body to a rear end of the locking outward flange portion . A cylindrical outer shell body and an annular rotary flange that is provided on a part of the outer peripheral surface of the outer shell body and is movable back and forth with respect to the outer shell body, and an outer peripheral surface on the rear end side of the outer shell body. Two flange connectors having a formed groove and a drop-off prevention ring that is attached to the groove and prevents the rotating flange from falling off the outer shell body are connected to each other through packing. A method of connecting a flange connector,
As the two flange connectors, the outer shell body is disposed on the front end side to be abutted against the other flange connector, the recess into which the packing is fitted, and the flat frontmost surface to be abutted against the other flange connector. And a locking outward flange portion projecting in a centrifugal direction from a part of the outer peripheral surface of the outer shell body, and the rotating flange is separate from the outer shell body. A large inner diameter portion positioned on the forefront side of the outer shell body and having an inner diameter larger than the diameter of the outward flange portion for locking, and adjacent to the large inner diameter portion and larger than the diameter of the outer shell body. large and aft the engagement the sealing has a diameter less than an inner diameter of the outward flange of the inner peripheral surface of the large diameter portion is formed to include a locking inward flange portion which protrudes centripetal direction
When the rotating flange is inserted from the rear end side opposite to the front end side of the outer shell body to the front end side with the large inner diameter portion facing the front in the traveling direction, the locking inward flange Between the outward flange portion for locking and the drop-off prevention ring, the portion of which is locked by the outward flange portion for locking of the outer shell body, and the rotary flange is movable back and forth with respect to the outer shell body. The large inner diameter portion is set so as to be fitted to the locking outward flange portion ,
The packing is accommodated in the recess, and the rotary flange is retracted to the rear end side, so that the packing is not covered with the rotary flange and is visible from the outside. butt front ends of the shell body, before Symbol go the rotary flange being directed in the traveling direction front large diameter portion is moved to the front side of the body the outer shell, inward flange portion for the engagement A method for connecting flange connectors, wherein the two flange connectors are connected in a state of being locked by the outward flange portion for locking of the outer shell body.

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