JP2002005353A - Conduit connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely maintain the connecting state and sealing of fitted and connected conduits easy to be executed. SOLUTION: A first conduit 2 on a fitting side is provided with a first coupling part 4 fixed in extracting direction to a tip side. A second conduit 3 on a fitting-in side is provided with a second coupling part 5 fixed in extracting direction to the tip side. A stopper part 9 is provided between the second coupling part 5 and the tip part. A sealing member 8 is mounted on a fitting-in part 13 of the second conduit 3 by locking axial moving by the stopper part 9. By coupling the first coupling part 4 and the second coupling part 5 by coupling means 6 and 7, the sealing member 8 is pushed by the stopper part 9 to seal the connection part between the first conduit 2 and the second conduit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit connecting device for connecting conduits such as water and sewage pipes, gas pipes, and transport pipes for transporting various fluids.

[0002]

2. Description of the Related Art In the piping work of various conduits, the operation of connecting the conduits is performed by various methods depending on the types of the conduits to be connected, connection strength conditions, connection sites, and other conditions.
As the conduit, for example, a metal pipe such as a steel pipe, a stainless steel pipe, a copper pipe, and an aluminum alloy pipe, a metal casting pipe, or a resin pipe formed of a vinyl chloride resin or a polyethylene resin is used. For example, a steel pipe or a cast pipe is used for a main pipe having a large diameter and a relatively large internal pressure, and a stronger connection is made between the pipes directly or via an appropriate connecting pipe member.

A large-diameter cast pipe or the like has, for example, a connection flange plate having a large number of connection holes at its connection end integrally formed around the circumference thereof, and this connection flange plate is provided with an appropriate shielding mechanism. A direct connection mechanism is employed in which the bolts are screwed into the coupling holes and then coupled after butting with each other.
In addition, a direct connection mechanism that integrates a member equivalent to the above-described connection flange plate by welding or the like to the connection end and connects via the connection member to the steel pipe or the like is employed.

In general, a so-called mating connection structure having a simple structure is adopted in which an end of one of the conduits is fitted to a fitting portion bulged at the other end and connected thereto. ing. In such a mating connection structure, a conduit is used in which a large-diameter fitting portion is bulged at one end and a straight pipe portion at the other end is a fitting portion fitted to the mating portion on the other side. Can be In the fitting connection structure, the fitting portions and the fitting portions are alternately fitted to each other to directly connect a large number of conduits.

[0005] Further, as another fitting connection structure,
Since the connection is often made by cutting the conduit to an appropriate length according to the site response, a connection is formed at both ends by fitting portions for fitting the ends of the conduit having the same diameter over the entire length. A method using a pipe member has also been adopted. In the mating connection structure, the end of the conduit is configured as a fitting portion, and the conduit is sequentially connected via the connecting pipe member by fitting the end to the fitting portion.

However, the above-mentioned fitting connection structure has a problem that when a pulling force is applied to the conduit or the connecting pipe member in a direction opposite to the fitting direction, the conduit is likely to be de-tubered. . Therefore,
The fitting connection structure is provided with an appropriate detachment prevention mechanism for maintaining the connection state of the conduit or the connection pipe member. The detachment prevention mechanism is provided, for example, by providing opposed connecting flange plates fixed in the connecting direction on the outer peripheral portion of the conduit or the connecting pipe member, and connecting the connecting flange plates with bolts or the like. The disengagement prevention mechanism is assembled in such a manner that one side is integrally formed around the circumference of the conduit and the other side is prevented from being pulled out by being frictionally coupled to the conduit.

On the other hand, the connecting structure of the conduit is provided with a sealing structure in which a sealing member formed of rubber or the like is inserted into the connecting portion in order to prevent water leakage from the connecting portion. In the case of a connection structure such as a cast pipe or a steel pipe described above, an annular sealing member is inserted between the connection flange plates, and the connection flange plate is crimped by bolts so that sealing is performed. ing. In the case of the fitting connection structure, a sealing member is attached to an outer peripheral portion on a fitting side, and the sealing member is closely attached between an outer periphery of the fitting portion and an inner periphery of the fitting portion to perform sealing. I am trying to be.

For example, Japanese Patent Application Laid-Open No. 10-122455, "Earthquake-resistant structure of a pipe joint" discloses a first conduit having a fitting portion bulged at an end and a connecting flange portion integrally formed, and a fitting. There is disclosed a second conduit in which a stopper convex portion is formed on the outer peripheral portion on one end side and a connecting flange member which is prevented from being removed by the stopper convex portion is combined. This prior invention discloses a through bolt for connecting the connecting flange portion and the connecting flange member to maintain the fitted state of the second conduit with the first conduit, and a press ring member assembled to the through bolt. Have been. According to the invention of the prior application, the pressing ring member moves to the first conduit side by tightening the through bolt and presses the sealing member, thereby preventing the first conduit and the second conduit from being separated from each other. Make sure that sealing is also performed.

[0009]

In the conventional detachment prevention mechanism described above, one of the connecting flange members has a structure in which the connecting flange member is frictionally connected to the conduit. Is applied, the second conduit on the insertion side moves in the removal direction, and as a result, there is a problem in that a detubing accident occurs. In the conventional detachment prevention mechanism, in order to suppress the movement of the second conduit,
By assembling the coupling flange member so as to press and deform a part of the conduit with a large force, a larger frictional force is generated between the conduit and the conduit. However, the conventional detachment prevention mechanism has a problem in that the internal strain is generated in the conduit, the material is deteriorated, and the product life is significantly shortened.

In the detachment prevention mechanism, a connecting flange member having a half-split structure capable of being attached / detached to / from a conduit is also used, and a bolt and a nut are tightened in a state where each half member is assembled to the conduit. Be transformed into
In such a disengagement prevention mechanism, particularly when the connecting flange member is integrated with the resin pipe, a large deformation of the conduit often occurs due to one-sided tightening or over-tightening of the bolts and nuts due to the material characteristics, and cracks are generated in the deformed portion And damage easily occur.

For example, in a detachment prevention mechanism for a cast iron tube or the like, a coupling flange member provided with a plurality of ratchet claws on the inner diameter portion acting in the coupling direction is also used. In the disengagement prevention mechanism, a bolt provided on the ratchet pawl is tightened after a through bolt is passed between the connecting flange member and the mating connecting flange portion. In the disengagement prevention mechanism, this causes each ratchet pawl to bite into the outer periphery of the conduit to secure the conduit to the coupling flange member. In the detachment prevention mechanism, since the coating on the surface of the conduit is peeled off by the ratchet claw biting, there is a problem that corrosion due to a natural potential difference between the ratchet claw and the conduit progresses and water leakage is likely to occur.

In the above-mentioned prior invention, the separation prevention between the first conduit and the second conduit to be connected and the mounting of the sealing member are performed at the same time. It has the features that it is secured and the workability is good. Further, in the invention of the prior application, since the connecting flange member is prevented from coming off by the stopper convex portion, the second
The characteristic feature is that the load for fixing the connecting flange member to the conduit in the detaching direction is small.

However, in the invention of the prior application, in a state where the connecting flange member and the pressing ring member are previously mounted on the second conduit, a through bolt is inserted from the connecting flange member side, and a stopper nut is assembled to this. After that, the pressing ring member is penetrated, and a screwing operation to the second coupling flange portion is further performed. Therefore, in the invention of the prior application, there has been a problem that, for example, when connecting pipes in a narrow and dim excavation groove or the like, alignment of each member is troublesome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a conduit connecting device in which conduits and the like connected by simple construction by a mating connection structure can reliably maintain their connection state and sealing. It is a proposal.

[0015]

To achieve this object, a conduit connecting device according to the present invention comprises a first mating connection.
And a second conduit. The conduit connecting device is provided with a first coupling portion fixed in the first conduit on the fitting side in a direction toward the distal end, and fixed in the second conduit on the fitting side in a direction toward the distal end. And a stopper portion is provided between the second connecting portion and the distal end portion. The conduit connecting device is provided with a sealing member mounted on the fitting portion of the second conduit by locking the movement in the axial direction by the stopper portion.

According to the conduit connecting device of the present invention constructed as described above, the second conduit is fitted and connected to the fitting portion of the first conduit with the sealing member mounted on the fitting portion. Is done. According to the conduit connecting device, the first conduit and the second conduit are coupled between the first coupling portion and the second coupling portion by coupling means, so that the fitting portion is fitted to the fitting portion. The connected state is securely maintained. According to the conduit connection device, as the fitting portion enters the fitting portion, the sealing member is pressed by the stopper portion and comes into close contact with the fitting portion and the fitting portion,
Sealing between the first conduit and the second conduit is assured. Therefore, according to the conduit connecting device, the first conduit and the second conduit are prevented from being separated from each other, and the first conduit is connected to the first conduit.
The sealing action between the second conduit and the second conduit is reliably achieved by a simple structure and a simple operation.

Further, a conduit connecting device according to the present invention for achieving the above-mentioned object has a first fitting-fitted connection.
, A second conduit, and a connecting pipe member interposed therebetween. The conduit connecting device is configured such that a first or second connecting direction is fixed to a connecting pipe or a connecting pipe member.
And a connecting pipe member or conduit on the fitting side is provided with a second connecting section fixed in the direction of withdrawal toward the distal end, and a stopper section is provided between the second connecting section and the distal end. Is provided. The conduit connecting device is configured such that a stopper member stops axial movement of the fitting portion of the fitting side member, and a sealing member is attached to the fitting portion.

[0018] According to the conduit connecting device of the present invention configured as described above, the first fitting portion of the connecting pipe member and the second fitting portion of the connecting pipe member are connected.
The first fitting portion of the first conduit and the second fitting portion of the first conduit.
Are fitted and connected to the second fitting portions of the conduits. According to the conduit connecting device, the first conduit and the second conduit are coupled to the connecting pipe member by the coupling means between the first coupling portion and the second coupling portion facing each other. Thereby, the fitting state of the fitting portion to the fitting portion is securely held and connected. According to the conduit connecting device, as the first fitting portion and the second fitting portion enter the opposing first fitting portion and the second fitting portion, respectively, the sealing member is pressed by the stopper portion. By sealing between each fitting portion and the fitting portion, the first
The second conduit and the second conduit are connected to the connecting pipe member while the sealing is securely held.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 as a first embodiment of the present invention,
An example in which the second conduit 3 is connected to the first conduit 2 by a fitting structure is shown. The conduit connection device 1 is an appropriate conduit such as a conduit for flowing a liquid such as a water and sewage pipe, a conduit for flowing a gas such as a city gas or a cooling gas, or a conduit for flowing a fluid composed of a solid such as powder, granules, and gels. Applied as a conduit connection device.

The conduit is applied not only to a straight pipe but also to a connection of a spiral pipe or any other suitable conduit which is suitable for use in, for example, bypass piping. For the conduit, a resin tube molded of vinyl chloride resin or polyethylene resin,
A metal tube such as a steel tube, an aluminum alloy tube, or a cast iron tube is used. The conduit connecting device 1 is applied to connection of not only conduits of the same material but also conduits of different materials.

The conduit connecting device 1 has a detachment preventing function for maintaining a fitted state of the first conduit 2 and the second conduit 3 connected by a fitting structure as described in detail later,
A sealing function for maintaining airtightness, watertightness, and the like between the first conduit 2 and the second conduit 3 is achieved at the same time. The conduit connecting device 1 includes a first coupling flange 4 formed integrally with the first conduit 2, a second coupling flange 5 formed integrally with the second conduit 3, Coupling bolt 6
And a tightening nut 7. In the conduit connection device 1, these parts and the stopper projection 9 constitute a detachment prevention mechanism that maintains the fitted state of the first conduit 2 and the second conduit 3. A first connecting pipe 2 and a second connecting pipe 3 are connected to the connecting pipe 1.
Are sealed by the sealing member 8. The conduit connecting device 1 includes a sealing member 8 in the second conduit 3.
Is provided.

As shown in FIGS. 1 and 2, the first conduit 2 has a fitting portion 11a having a large-diameter fitting opening 11a formed by swelling the distal end portion 10 over the entire circumference. The unit 11 is configured. The other end (not shown) of the first conduit 2 is left as the straight pipe portion 2a, and is configured as a fitting portion with the other party. As shown in FIG. 2, the fitting portion 11 includes a large-diameter cylindrical portion 11a at a distal end portion, and a connecting cylindrical portion 11b having a funnel-shaped cross section connecting the large-diameter cylindrical portion 11a and the straight pipe portion 2a. Become. The inner diameter of the large-diameter cylindrical portion 11a is
Having an inside diameter sufficient to fit the conduit 3 of
It is configured as a tapered hole whose diameter gradually decreases inward from the opening. Needless to say, the fitting portion 11 is not limited to such a structure.
a may be formed to have the same inner diameter, or the connecting tubular portion 11b may have a vertical shape.

The first conduit 2 is integrally formed with a disc-shaped first coupling flange 4 over the entire circumference at a distal end portion of the outer peripheral portion 11c of the large-diameter cylindrical portion 11a. A large number of guide holes 12 are formed in the first coupling flange 4 so as to penetrate in the thickness direction. The guide holes 12 are provided at regular intervals in the circumferential direction with respect to the first coupling flange portion 4. By forming the guide holes 12 at equal intervals, the first coupling flange portion 4 provides a uniform clamping force in the circumferential direction when coupling with the coupling bolt 6 and the clamping nut 7 as described later. Is generated. In addition, each guide hole 12 may be configured by a screw hole into which the coupling bolt 6 is screwed.

When the first conduit 2 is, for example, a steel tube, it is difficult to integrally form the first coupling flange portion 4 with the fitting portion 11 described above, and it becomes extremely expensive. Therefore, the first conduit 2 made of steel pipe is
A separate annular connecting flange member may be used, and the connecting flange member may be fixed at its inner peripheral portion to the outer peripheral portion of the conduit by welding.

Further, in the first conduit 2, for example, the entire fitting portion 11 including the first coupling flange portion 4 may be constituted by a separate fitting member. The fitting member has, for example, an inner diameter on the base end side substantially equal to the outer diameter of the straight pipe portion 2a, and an inner circumferential screw formed on an inner circumferential wall of the base end portion is formed on an outer circumferential portion of the straight pipe portion 2a. The first conduit 2 is integrally formed by being screwed into the outer peripheral screw. Further, the fitting member may be a member that is fixed to the first conduit 2 in the detaching direction but is combined in a free state in the circumferential direction. By rotating the fitting member relative to the first conduit 2, the mutual coupling flange portions can be aligned without rotating the first conduit 2 and the second conduit 3.

When the first conduit 2 has a relatively short axis and can be inserted from the other end, the first conduit 2 is inserted through a coupling flange member formed in a ring shape by another member from the other end. It may be assembled. The first conduit 2 is prevented from falling off from the distal end side by the engagement of the coupling flange member by the fitting portion 11.

When the strength condition is sufficiently ensured, the first conduit 2 has a plurality of strip-shaped or channel-shaped connecting flange projections having guide holes integrally formed on the outer periphery of the fitting portion 11. It may be formed. Further, the first conduit 2 may be configured such that the coupling flange pieces of the separate members having such a shape are fixed to the outer peripheral portion of the fitting portion 11 at equal intervals by welding. In the first conduit 2, these connecting flange protrusions and connecting flange pieces are provided at equal intervals on the outer peripheral portion of the fitting portion 11.

The second conduit 3 is a straight pipe portion 2 of the first conduit 2.
One end having the same diameter as a is formed as a fitting portion 13 with respect to the fitting portion 11 of the first conduit 2, and the other end (not shown) has the same fitting as the fitting portion 11 of the first conduit 2 described above. It is configured as a joint. When the second conduit 3 is connected to the first conduit 2 as described later, the fitting portion 13 is provided between the fitting portion 11 and the large-diameter cylindrical portion 11a when the second conduit 3 is connected to the first conduit 2. As shown in FIG. 2, a circumferential clearance d is formed. In addition, the clearance d is the large-diameter cylindrical portion 11.
It is the minimum clearance formed between a and the fitting portion 13.

The outer peripheral portion 1 of the fitting portion 13 is
A stopper protrusion 9 for pushing the sealing member 8 into the large-diameter cylindrical portion 11a of the first conduit 2 is formed integrally with the 3a as described later. The stopper convex portion 9 is provided with the fitting portion 1.
3 is integrally formed over the entire circumference with a protrusion amount equal to or slightly larger than the clearance d. The second conduit 3 is configured such that the fitting portion 13 extending from the stopper convex portion 9 to the distal end portion is fitted into the large-diameter cylindrical portion 11a of the fitting portion 11 with an appropriate fitting margin.
Is connected to the conduit 2.

The second conduit 3 has a disk-shaped second coupling flange 5 all around the outer periphery of the straight pipe portion 3a opposite to the distal end side via the stopper projection 9. They are integrally formed to protrude. A plurality of guide holes 14 are formed in the second coupling flange 5 so as to penetrate in the thickness direction. The guide holes 14 are provided at equal intervals in the circumferential direction with respect to the second coupling flange portion 5, and have the same number and spacing as the guide holes 12 of the first coupling flange portion 4 of the first conduit 2. Are made equal. By forming the guide holes 14 at equal intervals, the second connecting flange portion 5 is provided with a connecting bolt 6 and a tightening nut 7 as described later.
When performing the connection by the above, a uniform tightening force is generated in the circumferential direction. Note that each guide hole 14 may be formed by a screw hole into which the coupling bolt 6 is screwed.

When the second conduit 3 is, for example, a steel tube, it is difficult to integrally form the second coupling flange 5 or the stopper projection 9 with the fitting portion 13 described above. is there. Therefore, the second made of steel tube
Is formed by combining an annular stopper member and a coupling flange member formed as separate members, and the stopper member and the coupling flange member are fixed by welding the inner peripheral portion to the outer peripheral portion of the fitting portion 13. It is composed.

The above-mentioned stopper member and coupling flange member need not necessarily be fixed to the outer peripheral portion of the second conduit 3, but are fixed in the pulling-out direction, but are combined in a free state in the circumferential direction. Is also good. The connecting flange members can be rotated with respect to the second conduit 3 so that the mutual connecting flanges can be aligned without turning the first conduit 2 or the second conduit 3.

When the strength condition is sufficiently ensured, the second conduit 3 is provided with a plurality of strip-shaped or channel-shaped connecting flange projections having guide holes on the outer periphery of the fitting portion 13. You may. In addition, the second conduit 3 may be configured such that the connecting flange pieces of another member having such a shape are fixed to the outer peripheral portion of the fitting portion 13 at equal intervals by welding, and the second conduit 3 is fixed in the detaching direction. You may make it combine in the direction free. In the second conduit 3, the connecting flange projections and the connecting flange pieces are provided at equal intervals on the outer peripheral portion of the fitting portion 13.

A sealing member 8 is mounted on the outer peripheral portion 13a of the fitting portion 13 from the distal end side of the second conduit 3.
The sealing member 8 is made of a water-tight and air-tight elastic material such as rubber or synthetic rubber, and has an outer peripheral portion 13 a of the fitting portion 13.
It is formed into a cylindrical shape having an inner diameter that fits tightly. The sealing member 8 has a thickness of the fitting portion 1 in a state where the second conduit 3 is connected to the first conduit 2.
The clearance d is slightly larger than the clearance d formed between the large-diameter cylindrical portion 11a and the outer peripheral portion 13a of the fitting portion 13, and is formed so as to maintain watertightness and airtightness therebetween.

Each of the connecting bolts 6 connects the first connecting flange 4 and the second connecting flange 5 in a state where the second conduit 3 is connected to the first conduit 2 as described later. I do. The connecting bolt 6 is connected to the connecting flange 4,
It is made of stainless steel, other metal material, synthetic resin material, or the like, which has a slightly longer axis than the opposing interval 5 and has mechanical strength and rust resistance. The coupling bolt 6 has a length sufficient to penetrate the guide holes 12 and 14 formed in the coupling flange portions 4 and 5, and has an outer peripheral screw into which a fastening nut 7 is screwed at a tip portion.

A conduit connection device 1 having the above-mentioned components.
In, the fitting portion 13 of the second conduit 3 is fitted and connected from the distal end portion 10 of the first conduit 2 to the fitting portion 11 thereof. The sealing member 8 is attached to the fitting portion 13 of the second conduit 3 in advance. Sealing member 8
Is prevented from moving inward because its insertion end abuts against the stopper projection 9. The sealing member 8 is
As the second conduit 3 is pushed into the first conduit 2, the second conduit 3 is compressed in the thickness direction, and the large-diameter cylindrical portion 11 of the fitting portion 11 is compressed.
Sealing is performed between the inner peripheral portion of the inner peripheral portion a and the outer peripheral portion 13a of the fitting portion 13.

In the conduit connecting device 1, the first conduit 2
The second conduit 3 has a second coupling flange 5
Are adjusted to correspond to the respective guide holes 14 of the first coupling flange 4 and the respective guide holes 12 of the first coupling flange portion 4.
In the conduit connecting device 1, the coupling bolts 6 are inserted into the respective guide holes 12 of the first coupling flange 4 from the first conduit 2 side. The coupling bolt 6 has its tip exposed through the guide hole 14 of the second coupling flange 5.
A fastening nut 7 is screwed into the coupling bolt 6 at the exposed end.

In the conduit connecting device 1, the second conduit 3 gradually moves toward the first conduit 2 as the tightening nut 7 is screwed. The sealing member 8 is pressed by the stopper projection 9 with the movement of the second conduit 3, and is compressed in the thickness direction by the above-described configuration of the tapered inner hole of the large-diameter cylindrical portion 11 a of the first conduit 2. It enters the inside of the fitting portion 11. As shown in FIG. 2, the sealing member 8 is interposed in a compressed state between the inner peripheral portion of the large-diameter cylindrical portion 11 a and the outer peripheral portion 13 a of the fitting portion 13, thereby reliably sealing therebetween. .

In the conduit connecting device 1, the first connecting flange 4 and the second connecting flange 5 are connected to the connecting bolts 6.
By firmly connecting the second conduit 3 to the first conduit 2 by firmly connecting the first conduit 2 and the tightening nut 7. In the conduit connecting device 1, even when a tensile force is applied to the first conduit 2 or the second conduit 3 due to vibration, land subsidence, or the like, the occurrence of detubing or loosening is reliably prevented.

In the conduit connecting device 1, the first conduit 2
The separation prevention function for maintaining the fitted state and the sealing function for maintaining watertightness and airtightness between the and the second conduit 3 are simultaneously operated, so that the structure is simple and the workability is excellent. ing. According to the conduit connection device 1, the first
Since the structure is such that a large force that distorts the conduit 2 and the second conduit 3 is not applied to the conduit 2 and the second conduit 3, the occurrence of material deterioration, breakage, deformation or cracking due to internal distortion is suppressed. According to the conduit connecting device 1, even when applied to a painted metal conduit, the coating is not peeled off, so that corrosion due to a natural potential difference between dissimilar metals is prevented.

In the conduit connecting device 20 shown in FIGS. 3 and 4 as a second embodiment of the present invention, a connecting flange member 21 and a stopper member 22 which are separate members are retrofitted to the second conduit 3. It has a feature in the structure to be assembled with. Since the other components of the conduit connecting device 20 are the same as those of the above-described conduit connecting device 1, the corresponding portions are denoted by the same reference numerals and detailed description thereof will be omitted. The conduit connecting device 20 is suitably used, for example, in a case where the second conduit 3 is cut to an appropriate length at a site in the laying work of the conduit.

The outer peripheral portion 1 of the fitting portion 13 is
A fitting groove 23 for attaching a stopper member 22 to be described later and fixing it in the axial direction is formed in 3a. The fitting concave groove 23 is formed such that the distance from the distal end portion is equal to that of the stopper convex portion 9 of the conduit connection device 1 described above. That is, the fitting concave groove 23 pushes the sealing member 8 into the fitting portion 11 of the first conduit 2 at an interval from the distal end portion into the outer peripheral portion 13a of the fitting portion 13 so that the sealing action is exerted. Are formed over the entire circumference corresponding to the positions that are sufficient. When the second conduit 3 is used after being cut to an appropriate length for the site, the fitting groove 23 is formed by performing a grooving process at the site.

The coupling flange member 21 is an annular disk member having a center hole 21a having an inner diameter that can be inserted into the straight pipe portion 3a of the second conduit 3, and is formed of a metal material, a synthetic resin material, or the like. ing. A plurality of guide holes 24 penetrating in the thickness direction of the coupling flange member 21 are formed at equal intervals in the circumferential direction. Each guide hole 24 is formed with the same number and the same interval as the guide holes 12 of the first coupling flange portion 4 of the first conduit 2. The connecting flange member 21 forms the guide holes 24 at equal intervals so that a uniform tightening force is generated in the circumferential direction when the connecting bolt 6 and the tightening nut 7 are connected. . Each guide hole 24
May be constituted by a screw hole into which the coupling bolt 6 is screwed.

The stopper member 22 is made of a spring steel or a synthetic resin having mechanical rigidity and elasticity.
In the natural state, both ends 22a and 22b are formed in an annular shape butted against each other. The stopper member 22
Its width is substantially equal to the groove width of the fitting groove 23, and its thickness is larger than the depth of the fitting groove 23. Stopper member 2
2 is configured as an annular body as described above,
Its inner diameter is substantially equal to the inner diameter of the bottom of the fitting groove 23.

The stopper member 22 is composed of, for example, two semicircular arc-shaped divided bodies, and is joined by bolts to integrate the respective butted ends in a state fitted in the fitting concave groove 23. It may be. Further, the stopper member 22 is composed of, for example, two semi-circular arc-shaped divided bodies, but one end side of these divided bodies may be connected to be openable and closable by a hinge mechanism. The stopper member 22 is fitted into the fitting concave groove 23 with the split body opened, and then joined together by joining the butting ends on the other end side with bolts.

The stopper member 22 constructed as described above
As shown by the chain line in FIG. 3, the ends 22a and 22b are fitted to the fitting portion 13 from the front side by expanding the diameter of the both ends 22a and 22b, and then fitted into the fitting groove 23. Stopper member 2
2 returns to the natural state when fitted into the fitting groove 23, and its inner peripheral portion is fitted into the fitting groove 23 as shown in FIG. The outer peripheral portion of the stopper member 22 projects and is exposed from the outer peripheral portion 13a of the fitting portion 13 over the entire periphery as shown in FIG. The stopper member 22 is, like the stopper projection 9 of the conduit connection device 1 described above, provided with the fitting portion 1.
A convex portion is formed on the outer peripheral portion 13a of No.3.

In the conduit connecting device 20, the fitting portion 13 of the second conduit 3 on which the sealing member 8 is mounted is fitted from the distal end portion 10 of the first conduit 2 to the fitting portion 11 thereof. Is done. The sealing member 8 is attached to the fitting portion 13 of the second conduit 3 in advance. In the conduit connecting device 20, the coupling bolts 6 are inserted into the respective guide holes 12 of the first coupling flange 4 from the first conduit 2 side. The coupling bolt 6 has its tip exposed through the guide hole 24 of the coupling flange member 21. A fastening nut 7 is screwed into the coupling bolt 6 at the exposed end.

In the conduit connecting device 20, as the tightening nut 7 is screwed in, the connecting flange member 21 moves to the distal end side along the fitting portion 13 to stop the stopper member 2.
Conflict with 2. In the conduit connecting device 20, the movement of the coupling flange member 21 toward the distal end side is stopped by the stopper member 22, so that the second conduit 3 gradually moves toward the first conduit 2. In the conduit connecting device 20, the sealing member 8 is pressed by the stopper member 22 with the movement of the second conduit 3, and the fitting portion 11 of the first conduit 2 is moved.
It enters while being compressed inside. Conduit connection device 20
In FIG. 4, as shown in FIG. 4, the sealing member 8 is brought into close contact with the inner surface of the connecting tubular portion 11 b, so that the inner peripheral portion of the large-diameter tubular portion 11 a of the fitting portion 11 and the outer peripheral portion 13 a of the fitting portion 13 are separated. The gap is reliably sealed.

In the conduit connecting device 20, the first connecting flange 4 and the connecting flange member 21 are connected to the connecting bolt 6
By firmly connecting the second conduit 3 to the first conduit 2 by firmly connecting the first conduit 2 and the tightening nut 7. In the conduit connection device 20, even when a tensile force is applied to the first conduit 2 or the second conduit 3 due to vibration, land subsidence, or the like, the occurrence of detubing or loosening is reliably prevented. .

In the conduit connecting device 20, similarly to the above-described conduit connecting device 1, a separation preventing function for maintaining a fitted state between the first conduit 2 and the second conduit 3 and a watertightness or airtightness are provided. The sealing action that maintains the properties is simultaneously performed. According to the conduit connection device 20, the first conduit 2 or the second conduit
The structure is such that a large force that distorts them is not applied to the conduits 3, so that deterioration of the material due to internal distortion, breakage, deformation or cracking is suppressed. According to the conduit connecting device 20, even when applied to a painted metal conduit, the paint is not peeled off, so that corrosion due to a natural potential difference between dissimilar metals can be prevented.

According to the conduit connecting device 20, even when the second conduit 3 is cut to an appropriate length according to the site, the fitting groove 13 is grooved in the fitting portion 13 and the connecting flange is formed. By assembling the member 21, connection with the first conduit 2 that maintains the separation prevention function and watertightness and airtightness is enabled. Therefore, according to the conduit connecting device 20, for example, it is not necessary to prepare a conduit having a predetermined length in advance by a preliminary investigation, and the workability can be further improved.

As the conduit, those made of various materials as described above are used, and the coupling structure also varies. The conduit connecting device 30 shown in FIG. 5 as a third embodiment of the present invention is different from the first conduit 31 in which, for example, the coupling flange portion forming the coupling structure is not integrally formed with the second conduit. 3 is applied when connecting. The conduit connection device 30 is the same as the above-described conduit connection device 1 except for the configuration other than the first conduit 31, and therefore, the corresponding portions are denoted by the same reference numerals and detailed description thereof will be omitted.

The first conduit 31 has a fitting portion 33 having a large-diameter fitting opening therein by forming a distal end portion 32 bulging over the entire circumference. The other end (not shown) of the first conduit 31 is left as a straight pipe portion 31a, and is configured as a fitting portion with a counterpart. Fitting part 33
Is a large-diameter cylindrical portion 33a at the distal end, and the large-diameter cylindrical portion 33a
And a connecting tube portion 33b having a funnel-shaped cross section for connecting the tube portion with the straight tube portion 31a.

A connecting flange member 34, which is a separate member, is retrofitted to the straight pipe portion 31 a in the first conduit 31, and is prevented from being pulled out by the fitting portion 33. The coupling flange member 34 includes a semicircular first ring half 35.
a and a second half ring 35b. First ring half 3
5a and a second ring half 35b (hereinafter, ring half 35
Collectively. ) Are formed in the same shape as each other, and have a semi-cylindrical base 36, a coupling flange 37 integrally projecting from the distal end side of the outer periphery of the base 36, and the base 36 and the coupling flange 37. And a connecting portion 38 orthogonally protruding from an end of the connecting portion 38.

In the ring half 35, the base 36 has an inner diameter substantially equal to the outer diameter of the straight pipe portion 31a.
1a is assembled so as to be in close contact with the outer peripheral portion. In the ring half 35, the inner diameter of the pair of bases 36, 36 having the overall cylindrical shape in the combined state is smaller than the outer diameter of the large-diameter cylindrical part 33 a of the fitting part 33. The ring half 35 has a plurality of guide holes 3 in the coupling flange 37.
9 are formed at equal intervals from each other, and a mounting hole 40 is formed in the connecting portion 38.

A pair of the ring halves 35 is combined with the first conduit 31 so as to sandwich the straight pipe portion 31a, and a connection bolt 41 and a nut are inserted between the opposed connection portions 38 through the mounting holes 40. (Not shown) to form a combined flange member 34. The coupling flange member 34 is prevented from coming off to the distal end side when the base 36 of each ring half 35 abuts against the large-diameter cylindrical portion 33a. Therefore, the coupling flange member 3
4, even if the first conduit 31 has a long axis or is difficult to insert from the other end because it is buried or the like, the mounting operation can be easily performed at an arbitrary position in the middle thereof. is there.

The connecting flange member 34 is
As described above, the pair of ring halves 35 are completely divided into two.
In addition to this, a structure in which the ring halves 35 are integrally formed by, for example, a synthetic resin and the respective ring halves 35 are continuously provided by thin hinge portions may be used.

In the conduit connecting device 30, the connecting flange member 34 having a half-split structure is assembled to the first conduit 31. However, the connecting flange member 34 having the same half-split structure on the second conduit 3 side is used. You may make it attach a coupling flange member. That is, the coupling flange member having the half-split structure is used by assembling it to either one or both depending on the structure of the first conduit and the second conduit to be fitted or the structure of the connecting pipe member described later.

In the conduit connecting device 30, the fitting portion 13 of the second conduit 3 on which the sealing member 8 is mounted is fitted from the distal end portion 32 of the first conduit 31 to the fitting portion 33 thereof. Is done. In the conduit connecting device 30, the coupling flange member 34 is assembled to the first conduit 31, and the coupling bolts 6 are inserted through the guide holes 39. In the conduit connecting device 30, the tip of each coupling bolt 6 is exposed through the guide hole 14 of the coupling flange 5 of the second conduit 3, and the fastening nut 7 is screwed into the exposed end.

In the conduit connecting device 30, as the tightening nut 7 is screwed in, the coupling flange member 34 moves to the distal end side along the straight pipe portion 31a to abut the large-diameter cylindrical portion 33a of the fitting portion 33. I do. In the conduit connecting device 30, the movement of the coupling flange member 34 toward the distal end is locked by the large-diameter cylindrical portion 33 a, so that the second conduit 3 is connected to the first
Gradually moves to the side of the conduit 31. In the conduit connecting device 30, the sealing member 8 is pressed by the stopper member 9 with the movement of the second conduit 3, and the first conduit 31
Of the fitting portion 33 while being compressed. In the conduit connection device 30, the sealing member 8 is
3 and the outer peripheral portion 13a of the fitting portion 13
Is tightly sealed, so that the space therebetween can be reliably sealed.

According to the conduit connecting device 30, the coupling flange member 34 can be assembled from an arbitrary position to the first conduit 31 in which the coupling flange portion constituting the detachment preventing mechanism is not integrally formed. Is done. Conduit connection device 30
According to this, the engagement of the coupling flange member 34 with respect to the first conduit 31 using the fitting portion 33 is achieved. According to the conduit connecting device 30, since it is not necessary to fix the coupling flange member 34 to the first conduit 31 with a large coupling force, it is possible to suppress the occurrence of material deterioration, breakage, deformation or cracking due to internal strain. . According to the conduit connecting device 30, even when applied to a painted metal conduit, the paint is not peeled off, so that corrosion due to a natural potential difference between dissimilar metals is prevented. Conduit connection device 30
Has the same functions and effects as the above-described embodiments.

A conduit connecting device 50 shown in FIG. 6 as a fourth embodiment of the present invention is the same as the above-described third embodiment in which the first conduit 51 has the connecting flange member 34 having a half-split structure. And a stopper member 22 in which the second conduit 52 side is assembled to the fitting portion 13.
Is configured in the same manner as in the above-described second embodiment. Therefore, with respect to the conduit connection device 50, the same reference numerals are given to portions corresponding to the respective embodiments, and the description thereof will be omitted.

According to the conduit connecting device 50, the first conduit 5
On the other hand, as described above, the connecting flange member 34 having a half-split structure is assembled at an arbitrary position of the straight pipe portion 31a by an extremely simple operation. Pipe connection device 5
According to 0, the stopper member 22 is assembled to the second conduit 52 by the extremely simple operation in the fitting groove 23 formed in the fitting portion 13 as described above. Therefore, according to the conduit connecting device 50, a reliable disconnection preventing function and a sealing function can be achieved by applying the present invention to the first conduit 51 and the second conduit 52 of the existing fitting structure which is not provided with the detachment preventing mechanism. The connection is made.

In the conduit connecting device 50, the second
Connecting flange member 21 for conduit 52
Is stopped by the stopper member 22 inserted from the front end side. In the conduit connecting device 50, for example, the coupling flange member 21 also has a half-segment structure similarly to the first conduit 51 side, and is located inside the stopper member 22 fitted in the fitting groove 23. It goes without saying that it may be assembled to the second conduit 52.

In each of the conduit connecting devices described above, the second
Stopper member 9 and stopper member 22 provided on the conduit side of
The sealing member 8 is pushed into the first conduit by the stopper member 22 (collectively referred to as a stopper member 22). Therefore, in the conduit connection device, the stopper member 22
It is preferable that the front end portion of the sealing member 8 be uniformly pressed by the pressing surface 22c, and that the sealing member 8 be uniformly adhered in the connected state.

For this purpose, the stopper member 22 is formed such that the pressing surface 22c is convex in the pressing direction of the sealing member 8, as shown in FIG. The stopper member 22 is formed to have a circular cross-sectional shape as shown in FIG. 2A, so that the pressing surface 22c for pressing the sealing member 8 has a larger contact area with the vertical surface. It is constituted by the arc surface to be performed.

The stopper member 22 has a substantially D-shaped cross-sectional shape as shown in FIG. 4B, and has a second conduit so that the side surface on the arc side is the pressing surface 22c. 3 may be attached. Stopper member 22
In, the pressing surface 22c is constituted by an arc surface that has a larger contact area with respect to the vertical surface.

Further, the stopper member 22 is shown in FIG.
As shown in FIG. 5, at least one side surface may be formed to have a polygonal cross-sectional shape, and the polygonal side surface may be attached to the second conduit 3 so as to serve as the pressing surface 22c. In the stopper member 22, the pressing surface 22
c is constituted by a polygonal surface having a larger contact area with respect to the vertical surface.

In each of the above-described embodiments, the fitting portion of the second conduit is fitted to the fitting portion of the first conduit for connection, but the present invention is limited to such a mode. Not something. The present invention is such that a connecting pipe member is interposed between a first conduit and a second conduit, and the first conduit is connected to the connecting pipe member, and the connecting pipe member and the second conduit are connected by fitting. The present invention is also applied to the conduit connecting device described above.

In a conduit connecting device 60 shown in FIG. 8 as a fifth embodiment of the present invention, a first conduit 61 and a second conduit 62 having a straight pipe structure butted against each other are connected to a connecting pipe member 63. Connected by The conduit connection device 60 is a conduit in which the first conduit 61 and the second conduit 62 are not only conduits that are separately piped, but also, for example, are leaked due to breakage or the like between the conduits, and the broken portions are cut. Is also good.

The conduit connecting device 60 includes not only a conduit in which the first conduit 61 and the second conduit 62 are opposed to each other substantially in a straight line but also a conduit in which the first conduit 61 and the second conduit 62 are connected at an appropriate angle. It may be. In this case, the connection pipe member 63 is
Although the details are omitted, the middle portion is bent or bent at an appropriate angle, or is formed of a flexible spiral tube. As the first conduit 61, the second conduit 62, and the connecting pipe member 63, those formed of the various materials described above are used.

The first conduit 61 is fitted over the entire outer periphery 61b at a predetermined distance from the distal end 61a so that a fitting margin for the connecting pipe member 63 is maintained as described later. A concave groove 64 is provided. First conduit 6
1 is fitted with an annular first stopper member 65 such that an outer peripheral portion thereof is exposed to the outside of the fitting concave groove 64. Although not described in detail, the first stopper member 65 is a member configured to have an annular shape in a natural state by abutting both ends like the stopper member 22 described above. The first stopper member 65 is attached to the fitting concave groove 64 from outside the first conduit 61 with both end portions expanded. The first conduit 61 may, of course, be formed such that the outer peripheral portion 61b is integrally formed with a stopper convex portion over the entire periphery.

The first connecting flange member 66 is attached to the outer peripheral portion 61b of the first conduit 61 at a position opposite to the distal end portion 61a with the first stopper member 65 interposed therebetween. The first coupling flange member 66 is formed of an annular disk member having a center hole 66a, and is formed of a metal material, a synthetic resin material, or the like. First coupling flange member 66
The inner diameter of the center hole 66 a is slightly larger than the outer diameter of the first conduit 61, so that the center hole 66 a can be inserted through the outer peripheral portion 61 b of the first conduit 61.

The first coupling flange member 66 is formed with a plurality of guide holes 66b penetrating in the thickness direction thereof at equal intervals in the circumferential direction. As will be described later, first coupling bolts 72 are inserted into the respective guide holes 66b, and the first coupling bolts 72 are connected to the connection pipe member 63 by the first tightening nuts 73. Each guide hole 66b
Are arranged at equal intervals so that a uniform tightening force is generated in the circumferential direction. Note that each guide hole 66b may be formed by a screw hole into which the first coupling bolt 72 is screwed.

The second conduit 62 is also the first conduit 6 described above.
The fitting groove 6 is formed on the outer peripheral portion 62b at a predetermined interval from the distal end portion 62a so as to maintain the fitting allowance for the connecting pipe member 63 over the entire circumference.
7 is recessed. An annular second stopper member 68 is fitted to the second conduit 62 such that an outer peripheral portion of the second conduit 62 is exposed to the outside of the fitting concave groove 67. Although not described in detail, the second stopper member 68 is a member configured to have an annular shape in a natural state by abutting both ends like the first stopper member 65 described above. Second
The stopper member 68 of the second conduit 62 is expanded at both ends.
Is assembled to the fitting groove 67 from outside. The second
It is a matter of course that the conduit 62 may be formed such that a stopper convex portion is integrally formed on the outer peripheral portion 62b over the entire periphery thereof.

The second connecting flange member 69 is attached to the outer peripheral portion 62b of the second conduit 62 at a position opposite to the distal end portion 62a with the second stopper member 68 interposed therebetween. The second coupling flange member 69 is formed of an annular disk member having a center hole 69a, and is formed of a metal material, a synthetic resin material, or the like. Second coupling flange member 69
The inner diameter of the center hole 69a is slightly larger than the outer diameter of the second conduit 62, so that the center hole 69a can be freely inserted into the outer peripheral portion 62b of the second conduit 62.

A large number of guide holes 69b penetrating in the thickness direction of the second coupling flange member 69 are formed at equal intervals in the circumferential direction. As will be described later, second connection bolts 74 are inserted into the respective guide holes 69b, and the connection with the connection pipe member 63 is achieved by the second fastening nut 75. Each guide hole 69b
Are arranged at equal intervals so that a uniform tightening force is generated in the circumferential direction. Note that each guide hole 69b may be configured by a screw hole into which the second coupling bolt 74 is screwed.

The first conduit 61 has a tip 61
a side of the first sealing member 7
0 is attached. The first sealing member 70 is made of a water-tight and air-tight elastic material such as rubber or synthetic rubber.
The first conduit 61 is formed into a cylindrical shape having an inner diameter that is tightly fitted to the outer peripheral portion 61b. The first sealing member 70 includes the fitted first conduit 61 and the connecting pipe member 6.
3 has a thickness slightly larger than the clearance formed between the fitting portions.

The second conduit 62 also has a second sealing member 71 attached to its outer peripheral portion 62b from the distal end portion 62a side. The second sealing member 71 is also the first sealing member described above.
Similarly to the sealing member 70, the second conduit 62 is made of a watertight and airtight elastic material such as rubber or synthetic rubber.
And is formed into a cylindrical shape having an inner diameter that is tightly fitted to the outer peripheral portion 62b of the cylindrical member. The second sealing member 71 also has a thickness slightly larger than the clearance formed between the fitting portions of the second conduit 62 and the connecting pipe member 63.

The connecting pipe member 63 has a first fitting tube 78 having a first fitting opening 78a opened at both ends of a connecting tubular portion 76 having substantially the same diameter as the first conduit 61 and the second conduit 62. Part 77a
And the second fitting cylindrical portion 7 having the second fitting opening 78b opened.
7b are formed integrally with each other. Connecting pipe member 6
3, a first coupling flange portion 79a is integrally formed on the outer peripheral portion of the first fitting cylindrical portion 77a so as to protrude over the entire periphery, and is formed on the outer peripheral portion of the second fitting cylindrical portion 77b. A second coupling flange portion 79b is integrally formed so as to protrude over the entire circumference.

Each fitting tube portion 77 has a large-diameter fitting opening 78 formed therein by forming a distal end portion of the connection tube portion 76 so as to protrude over the entire circumference. Each fitting tube 77
The inner diameter of the fitting port 78 is the first conduit 61 and the second conduit 62
Are larger than the outer diameter of
a and 62a are each fitted with an appropriate clearance. When the first conduit 61 and the second conduit 62 are fitted to the fitting port 78 as described later, the fitting cylinder portions 77 are hermetically sealed by the sealing members 70 and 71 filled in the clearances. Is done.

Each coupling flange 79 is provided with a respective fitting cylinder 77
Is a disc-shaped part integrally formed so as to protrude over the entire circumference at the tip end part of. A plurality of guide holes 80a and 80b penetrating in the thickness direction are formed in each coupling flange portion 79, respectively. The guide holes 80 are provided at equal intervals in the circumferential direction with respect to the respective connection flange portions 79, and are connected by the connection bolt 72 and the fastening nut 73 or the connection bolt 74 and the fastening nut 75 as described later. Is performed so that a uniform tightening force is generated in the circumferential direction. In addition, each guide hole 80 may be configured by a screw hole.

In the connecting pipe device 60 provided with each member configured as described above, the distal end portion 61a of the first conduit 61 is fitted to the first fitting cylindrical portion 77a with respect to the connecting pipe member 63. At the same time, the distal end portion 62a of the 21st conduit 62 is fitted and connected to the second fitting cylinder portion 77b. The connecting pipe device 60 reliably holds the fitted state and the sealing state of the first conduit 61 and the connecting pipe member 63 and the fitted state and the sealed state of the second conduit 62 and the connecting pipe member 63. . The connecting pipe device 60 includes a first conduit 61.
The connection operation between the first conduit 61 and the connection pipe member 63 and the connection operation between the second conduit 62 and the connection pipe member 63 are performed in substantially the same manner. I will explain.

In the connecting pipe device 60, the first conduit 6
1, a first sealing member 70 is attached to an outer peripheral portion 61b of the first sealing member 70, which is inserted from a distal end portion 61a. The first sealing member 70 is attached to the first conduit 61 in a state where the insertion end thereof is in contact with the first stopper member 65 so that the first sealing member 70 is prevented from moving inward. In the connection pipe device 60, as the first conduit 61 is pushed into the first fitting cylindrical portion 77 a of the connection pipe member 63, the first sealing member 70 is compressed in the thickness direction, and the first conduit 61 is compressed. 61
Between the outer peripheral portion 61a and the fitting opening 78a.

In the connection pipe device 60, the first connection flange member 66 is provided in the first conduit 61 with the guide hole 66 b of the first connection flange portion 79 of the connection pipe member 63.
Position adjustment is performed so as to coincide with the respective guide holes 80a. In the connection pipe device 60, the first connection bolts 72 are inserted into the guide holes 66b of the first connection flange member 66, respectively. First coupling bolt 72
Are exposed through the guide holes 80a of the first coupling flange 79a. First coupling bolt 7
2, a first tightening nut 73 is screwed into the exposed end.

In the connecting pipe device 60, as the first tightening nut 73 is screwed in, the first connecting flange member 66 moves toward the first stopper member 65 and abuts against the first stopper member 65 to be locked. You. In the connection pipe device 60, the connection pipe member 63 is gradually moved toward the first conduit 61 by further screwing the first tightening nut 73.

The first sealing member 70 is engaged with the first stopper member 65 at the front end thereof with the movement of the connecting pipe member 63 and locked, but the rear end side is further pressed to connect. It enters into the first fitting cylindrical portion 77a of the tube member 63 while being compressed. The sealing member 70 is thereby brought into close contact with the inner surface of the fitting tube portion 77a of the connection pipe member 63, and the fitting inlet 78a and the outer peripheral portion 61b of the first conduit 61 are provided.
Sealing between and.

In the conduit connecting device 60, the first connecting flange member 66 and the first connecting flange portion 79a are firmly connected by the first connecting bolt 72 and the first tightening nut 73, so that The fitted connection between the first conduit 61 and the connecting pipe member 63 is reliably maintained. In the conduit connecting device 60, even when a tensile force is applied between the first conduit 61 and the connecting pipe member 63 due to vibration, land subsidence, or the like, the occurrence of detubing or loosening is reliably prevented.

In the conduit connecting device 60, the fitting connection operation between the second conduit 62 and the connecting pipe member 63 is performed in the same manner as the fitting connection operation between the first conduit 61 and the connecting pipe member 63 described above. Done.

In the conduit connecting device 60, the first pipe 61 and the second pipe 62 are fitted to the connecting pipe member 63 so as to prevent the detachment function of maintaining the connected state, and the sealing function of maintaining watertightness and airtightness. Function at the same time, the structure is simple and the workability is excellent.
According to the conduit connecting device 60, the first conduit 61, the second conduit 62, or the connecting pipe member 63 has a connection structure in which a large force that distorts the first conduit 61, the second conduit 62, or the connecting pipe member 63 is not applied. The occurrence of breakage, deformation, cracks, etc. is suppressed. According to the conduit connecting device 60, even when applied to a painted metal conduit, the coating is not peeled off, so that corrosion due to a natural potential difference between dissimilar metals is prevented.

The present invention relates to a connecting pipe member 63 having the above-described structure.
However, the present invention is not limited to the connection structure using the cable, but may be configured in various modes depending on the structure of the conduit. In the connection pipe member 63, the coupling flange portion 76 is formed integrally, but a coupling flange member having, for example, a half-split structure may be assembled to the fitting cylinder portion 77. The conduit connecting device 60 is configured to couple the first conduit 61 and the second conduit 62 to the connecting pipe member 63 by separate coupling bolts and tightening nuts. For example, the first coupling flange member may be used. 6
6. The connecting flanges 79a, the second connecting flange 79b, and the connecting bolts communicating with the second connecting flange member 69 may be collectively connected by connecting bolts.

When the connecting pipe member is used, for example, between the first conduit 2 and the second conduit 3 shown in the first embodiment, the first conduit 2 side is a straight pipe. The fitting portion is configured as a fitting portion, and the fitting portion is formed to protrude on the second conduit 3 side. For example, when the fitting portions are formed to bulge in the first conduit 2 and the second conduit 3, respectively, the connecting pipe member has a straight pipe structure as a whole, and stopper members or stopper protrusions are provided at both ends thereof. The part is provided fixed in the axial direction.
When the connecting pipe member is relatively short, a stopper member or a stopper protrusion may be provided at a substantially central portion in the axial direction, and sealing members may be attached to both sides thereof.

The connecting pipe member 63 is made of a first pipe having the same outer diameter.
The second conduit 62 is connected to the second conduit 61, but it is also used when connecting conduits having different outer diameters. In this case, the connecting pipe member 63 has, of course, the inside diameter or the outside diameter at both ends adapted to the specification of the connecting pipe.

A conduit connecting device 90 shown in FIGS. 9 and 10 as a sixth embodiment of the present invention is suitably used for connecting a first conduit 91 and a second conduit 92 having a slightly larger diameter. ,
It is characterized by the configuration of the fitting portion 92a of the second conduit 92 and the stopper member 93 that is to be retrofitted to the fitting portion 92a. The configuration with the second conduit 92 and the stopper member 93 described later is of course also applied to the connecting pipe member of the conduit connecting device 60 described above.

In the conduit connecting device 90, the first conduit 91 has the same configuration as the first conduit 2 of the above-described conduit connecting device 1, and other configurations except for the second conduit 92 and the stopper member 93. The members are the same as those in the above-described embodiments, and the corresponding portions are denoted by the same reference numerals and detailed description thereof will be omitted. The conduit connection device 90 includes:
The coupling structure and the like described in each of the above embodiments may be appropriately adopted for the coupling portion and the like.

In the second conduit 92, a first fitting groove 94 and a second fitting groove 95 are formed on the outer periphery of the fitting portion 92a. First fitting groove 94 and second fitting groove 95
Are formed at different positions in the axial direction, in other words, in a region having a predetermined width in the axial direction. First fitting groove 9
Reference numeral 4 includes a plurality of recesses formed along the same circumference c1. The second fitting groove 95 also includes a plurality of recesses formed along the same circumference c2, and each of these recesses and each recess of the first fitting groove 94 extend in the circumferential direction. The position is different. Therefore, the first fitting groove 94 and the second fitting groove 95 are
As shown in FIG. 10, the respective concave portions are arranged in a staggered manner and formed on the outer peripheral portion of the fitting portion 92a.

The stopper member 93 is made of a spring steel material or a synthetic resin material having mechanical rigidity and elasticity as in the case of the above-described stopper member 22, and is formed in an annular shape in which both ends 93a and 93b abut against each other in a natural state. It is formed in. The width of the stopper member 93 is slightly larger than the width obtained by adding the width of the first fitting concave groove 94 and the width of the second fitting concave groove 95. The inner diameter of the stopper member 93 is substantially equal to the outer diameter of the fitting portion 92a in a natural state.

The stopper member 93 has an inner peripheral portion 93c,
A first fitting projection 96 and a second fitting projection 97 are formed at different positions in the axial direction. The distance between the first fitting protrusion 96 and the second fitting protrusion 97 in the axial direction is substantially equal to the distance between the first fitting groove 94 and the second fitting groove 95. . The first fitting protrusions 96 are formed along the same circumference, and include a plurality of protrusions of the same number as the recesses of the first fitting recessed grooves 94. The outer shape of the first fitting projection 96 is substantially equal to the opening shape of each recess of the first fitting groove 94. The second fitting convex portion 97 is also formed along the same circumference and includes a plurality of convex portions of the same number as the concave portions of the second fitting concave groove 95. The second fitting projection 97 is
Each of the convex portions has an outer shape substantially equal to the opening shape of each concave portion of the second fitting concave groove 95.

The stopper member 93 is composed of, for example, two semicircular arc-shaped divided bodies based on the above-described configuration, and is provided with a butt end of each divided body in a state of being combined with the outer peripheral portion of the fitting portion 92a. The parts may be combined by bolts and integrated. Further, although the stopper member 93 is constituted by, for example, two semicircular arc-shaped divided bodies, the opposite ends of these divided bodies may be connected to be openable and closable by a hinge mechanism. The stopper member 93 is fitted to the outer peripheral portion of the fitting portion 92a in a state where each of the divided bodies is opened, and then integrated by joining the butting ends on the other end side with bolts.

The conduit connecting device 90 constructed as described above
According to this, the stopper member 93 is provided with both end portions 93a, 93b.
Is assembled to the fitting portion 92a from the front side by expanding the diameter. The stopper member 93 includes a first fitting projection 96.
And the respective convex portions of the second fitting convex portion 97 respectively fit into the corresponding concave portions of the first fitting concave groove 94 and the second fitting concave groove 95 and return to the natural state. The main body portion of the stopper member 93 is projected and exposed from the outer peripheral portion of the fitting portion 92a over the entire periphery. According to the conduit connection device 90, the first conduit 91 and the second
The stopper member 93 functions as a pushing member of the sealing member 8 in a state where the sealing member 8 is connected to the conduit 92 in the same manner as in the above embodiments.

In the conduit connecting device 90, the first fitting concave groove 94 and the second fitting concave groove 95 having different axial positions.
When the first fitting protrusion 96 and the second fitting protrusion 97 are fitted to each other, the stopper member 93 is moved to the fitting portion 92a.
Assembled in Therefore, in the conduit connecting device 90, the assembling strength of the stopper member 93 with respect to the fitting portion 92a is maintained even if the first fitting groove 94 and the second fitting groove 95 do not have a large groove depth. Become so. In the conduit connecting device 90, since the second conduit 92 is not formed with a large depth groove, the second conduit 92
Is maintained. The conduit connection device 90 includes:
It is suitably used for connecting the large diameter first conduit 91 and second conduit 92.

In the conduit connection device 90, the second
A first fitting groove 94 and a second fitting groove 95 each having a plurality of recesses are formed on the outer periphery of the fitting portion 92a of the conduit 92, and a plurality of recesses are formed on the inner periphery of the stopper member 93, respectively. Although the first fitting convex portion 96 and the second fitting convex portion 97 formed of the convex portions are formed, it is needless to say that the present invention is not limited to such a configuration.

In the conduit connecting device 90, for example, a first fitting concave groove 94 and a second fitting concave groove 95 are formed over the entire outer periphery of the fitting portion 92 a of the second conduit 92. The first fitting projection 96 and the second fitting projection 97 may be a projection formed on the inner periphery of the stopper member 93 over the entire circumference while being formed by the concave groove. . Moreover, since the stopper member 93 may be fixed in the axial direction and may be free in the circumferential direction,
Only the first fitting protrusion 96 and the second fitting protrusion 97 may be configured by a plurality of protrusions. Further, the conduit connecting device 90 may have a fitting convex portion formed on the fitting portion 92a side and a fitting concave groove formed on the stopper member 93 side.

In the conduit connecting device, the amount of the second conduit inserted into the first conduit is appropriately determined according to the outer diameter, material specification, laying specification, site conditions, and the like of each conduit. As described above, since the stopper member is fixed to the second conduit and the connecting pipe member in the axial direction and is assembled to the second pipe and the connecting pipe member, when the fitting amount is large, the sealing member can be sufficiently pushed. Is performed or the sealing member is cut to an appropriate length.

Therefore, the conduit connecting device 100 shown in FIG. 11 as the seventh embodiment of the present invention can be used even when the amount of fitting into the first conduit is different.
It is characterized in that the stopper member 102 can be assembled at an optimum position with respect to 01. For this reason, the conduit connecting device 100 uses the second conduit 101 in which the first fitting concave groove 103 and the second fitting concave groove 104 are formed on the outer peripheral portion of the fitting portion 101a. Since the other components of the conduit connection device 100 are the same as those of the above-described embodiments, the corresponding portions are denoted by the same reference numerals and the detailed description thereof will be omitted. In the conduit connection device 100, the components and members of other parts are appropriately used as the parts and members described in each of the above-described embodiments.

That is, in the second conduit 101, the first fitting concave grooves 103 which are parallel to each other at different axial positions.
And the second fitting concave groove 104 are formed over the entire outer periphery of the fitting portion 101a. In the second conduit 101,
As described above, the stopper member 102 is assembled from the distal end side of the fitting portion 101a, and the stopper member 102 is fitted into one of the first fitting groove 103 and the second fitting groove 104 by fitting. Fix it. When the fitting amount of the second conduit 101 is small with respect to the first conduit, the stopper member 102 is fitted into the first fitting concave groove 103 so as to be assembled. When the fitting amount of the second conduit 101 is large with respect to the first conduit, the stopper member 102 is fitted into the second fitting concave groove 104 so as to be relatively fitted.

Therefore, in the conduit connecting device 100, the stopper member 102 is attached to the outer peripheral portion of the fitting portion 101a in accordance with the fitting amount of the second conduit 101 to the first conduit, so that the stopper member 102 The sealing member is pushed well into the first conduit. The conduit connecting device 100 is adapted to allow the optimally aligned stopper member 10 as the second conduit 101 is pushed into its fitting 101a relative to the first conduit.
2 forces the sealing member into the first conduit,
Inner peripheral portion of first conduit and fitting portion 101 of second conduit 101
Seal with a.

It is needless to say that the configuration of the second conduit 101 described above is also applied to the connection pipe member. In addition, the second conduit 101 is provided on the outer peripheral portion of the fitting portion 101a.
Although the fitting concave grooves 103 and 104 are formed, it is a matter of course that the number is not limited.

Although a disc-shaped coupling flange is formed on each of the above-mentioned conduits and connecting pipe members, it is a matter of course that the present invention is not limited to such a shape. The coupling flange is
For example, in the case of a small-diameter conduit or the like that requires a small number of joints, it may be formed into a quadrangle having guide holes at four corners for easy production, or may be formed into an appropriate polygon. Similarly, the shape of the coupling flange member is not limited to a disk shape. Further, the stopper portion and the stopper member may be formed in an appropriate outer shape.

[0110]

As described above in detail, according to the conduit connecting device of the present invention, the conduit or the connecting pipe member to be mated and connected is connected to the connecting portion formed opposite to the connecting means. As a result, the connection state is reliably maintained, and the sealing member for sealing the connection portion is pushed into the conduit or the connection pipe member with the connection operation, so that reliable sealing is performed. Therefore, according to the conduit connecting device, even when a large load is applied to the connected conduit or connecting pipe member in the detaching direction by a simple construction by fitting, the connected state can be reliably maintained, The reliability can be improved, and the work efficiency can be greatly improved to reduce the construction cost. According to the conduit connecting device, since a large load is not applied to the conduit and the connecting pipe member,
Deterioration and damage due to internal distortion and the like, and occurrence of corrosion and the like due to a natural potential difference are suppressed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a conduit connecting device shown as a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the conduit connection device.

FIG. 3 is an exploded perspective view of a main part of a conduit connection device shown as a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a main part of the conduit connection device.

FIG. 5 is an exploded perspective view of a main part of a conduit connection device shown as a third embodiment of the present invention.

FIG. 6 is an exploded perspective view of a main part of a conduit connection device shown as a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram of a shape of a stopper member provided in the conduit connection device.

FIG. 8 is a longitudinal sectional view of a main part of a conduit connecting device using a connecting pipe member, shown as a fifth embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of a main part of a conduit connecting device shown as a sixth embodiment of the present invention.

FIG. 10 is an exploded perspective view of a main part of the conduit connection device.

FIG. 11 is an exploded perspective view of a main part of a conduit connection device shown as a seventh embodiment of the present invention.

[Explanation of symbols]

1 conduit connecting device, 2 first conduit, 3 second conduit,
4 coupling flange portion, 5 coupling flange portion, 6 coupling bolt, 7 fastening nut, 8 sealing member, 9 stopper convex portion, 11 fitting portion, 13 fitting portion, 20 conduit connecting device, 21 coupling flange member, 22 stopper member, 23 fitting groove, 30 conduit connecting device, 31 first
Pipe, 33 fitting part, 34 connecting flange member, 35
Ring half, 37 connecting flange, 60 conduit connecting device, 61 first conduit, 62 second conduit, 63 connecting pipe member, 64, 67 fitting concave groove, 65, 68 stopper member, 66, 69 connecting flange Member, 70, 71 Sealing member, 72, 74 Coupling bolt, 73, 75
Tightening nut, 77 fitting cylinder, 78 fitting opening, 79
Coupling flange portion, 90 conduit connecting device, 91 first conduit, 92 second conduit, 93 stopper member, 94 first fitting concave groove, 95 second fitting concave groove, 96 first fitting convex Part, 97 second fitting convex part, 100 conduit connecting device, 101 second conduit, 103 first fitting concave groove, 10
4 Second fitting concave groove

Claims (10)

[Claims] 1. A conduit connecting device in which a first conduit and a second conduit are fitted and connected to each other, wherein the first conduit on the fitting side is fixed to the first conduit in the direction of withdrawal toward the distal end. A connecting portion is provided, and a second connecting portion having a fixed insertion direction toward the distal end is provided in the second conduit on the fitting side, and a stopper portion is provided between the second connecting portion and the distal end. A sealing member is attached to the fitting portion of the second conduit by locking the movement in the axial direction by the stopper portion, and the sealing member fitted to the first conduit is attached. The connected second conduit is connected to the first connecting portion and the second connecting portion by the connecting means, so that the mating connection state is maintained, and the sealing member is pressed by the stopper portion. The first conduit and the second conduit Conduit connection apparatus characterized by sealing in close contact between the conduit. 2. A conduit connecting device comprising a first conduit, a second conduit, and a connecting pipe member interposed therebetween fitted and connected to each other. The member has a first coupling portion fixed in the direction of withdrawal toward the distal end side, and the connection pipe member or conduit on the fitting side has a second coupling portion fixed in the direction of withdrawal with the distal end side. With this second
A stopper portion is provided between the coupling portion and the distal end portion, and a sealing member is attached to the fitting portion of the fitting-side member by locking the movement in the axial direction by the stopper portion; The fitting side member fitted with the sealing member is connected to the first connecting portion and the second connecting portion by a connecting means, so that the fitted connection state is maintained, The conduit connecting device, wherein the sealing member is pressed by the stopper portion and tightly seals between the fitting-side member and the fitting-side member. 3. The stopper portion has a fitting groove formed in an outer peripheral portion of each of the conduits or the connecting pipe members, and a stopper fitted in the fitting groove to stop movement in the axial direction. The conduit connecting device according to claim 1, wherein the conduit connecting device is configured by a member. 4. The stopper member is formed as an annular body having both ends abutted with each other, and is capable of expanding its diameter by expanding the end portion. The conduit connecting device according to claim 3, wherein the conduit connecting device is attached to an outer peripheral portion, and is reduced in diameter and locked in axial movement by being fitted in the fitting concave groove. 5. The stopper member is divided into a plurality of parts, and each of the divided members is fitted into the fitting concave groove and combined with the outer peripheral portion of the conduit or the connecting pipe member, and then integrally formed with each other. The conduit connection device according to claim 3, wherein the conduit connection device is connected. 6. The fitting groove comprises a plurality of grooves formed at different positions in the axial direction on an outer peripheral portion of the conduit or the connecting pipe member, wherein the stopper member is provided on the fitting side member. 4. The conduit connecting device according to claim 3, wherein the fitting is selected according to an amount of fitting of the fitting-side member. 7. A plurality of fitting concave grooves formed on an outer peripheral portion of each of said conduits or connecting pipe members,
The stopper according to claim 1, further comprising: a stopper member having a plurality of fitting protrusions formed on the inner peripheral portion to be fitted into the fitting recess grooves, respectively. The conduit connection device according to claim 1. 8. Each of the fitting concave grooves is formed in an outer peripheral portion of the conduit or the connecting pipe member so as to be arranged in a staggered manner in the axial direction, and each of the fitting convex portions is formed on an inner periphery of the stopper member. The conduit connecting device according to claim 7, wherein the conduit connecting device is formed in a staggered manner at the portions. 9. The conduit connection device according to claim 1, wherein a side surface of the stopper that presses the sealing member is formed in a convex shape. 10. Each of the connecting portions is formed of a separate member which is retrofitted to an outer peripheral portion of the conduit or the connecting pipe member, and is divided into a plurality of parts, and each divided body is formed of an outer peripheral portion of the conduit or the connecting pipe member. The conduit connecting device according to any one of claims 1 to 5, wherein the conduit connecting device is integrally connected after being combined with the portion.