JP3380526B2 - Conduit connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit connection device for connecting conduits such as water and sewer pipes, gas pipes, or carrier pipes for carrying various fluids.

[0002]

2. Description of the Related Art In the piping work of various conduits, the conduits are connected by various methods depending on the type of conduit to be connected, the connection strength condition, the connection site and the like.
As the conduit, for example, a metal pipe such as a steel pipe, a stainless pipe, a copper pipe, an aluminum alloy pipe, a metal casting pipe, or a resin pipe formed of vinyl chloride resin or polyethylene resin is used. A steel pipe, a cast pipe, or the like is used as a conduit for a main pipe having a large diameter and a relatively large internal pressure, and the conduits are connected to each other more directly or via a suitable connecting pipe member.

In a large diameter casting pipe or the like, for example, a connecting flange plate having a large number of connecting holes at its connecting end is integrally formed around the circumference, and the connecting flange plate is provided with an appropriate shield mechanism. A direct connection mechanism is employed in which bolts are screwed into the coupling holes and then coupled after they are abutted through each other.
Further, a direct connecting mechanism is used for steel pipes and the like, in which a member equivalent to the above-mentioned connecting flange plate is integrated by welding or the like at the connecting end portion, and is connected through this connecting member.

In general, a so-called mating connection structure having a simple structure is employed in which the end of one of the conduits is fitted and connected to a fitting portion formed to bulge at the end of the other side. ing. In such a mating connection structure, a conduit is used in which a large-diameter fitting portion is bulged at one end side and a straight pipe portion at the other end is fitted to the mating fitting portion. To 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.

As another mating connection structure,
Since the pipe is often cut to an appropriate length and connected depending on the site, a connection in which both ends have bulged fitting parts that fit the ends of the pipe with the same diameter over the entire length A method using a pipe member is also adopted. In the fitting connection structure, an end portion of the conduit is configured as a fitting portion, and by fitting this end portion to the fitting portion, the conduits are sequentially connected via the connecting pipe member.

By the way, in the above-mentioned fitting connection structure, there is a problem that the pipe is likely to be removed when a tensile force is applied to the conduit or the connecting pipe member in a direction opposite to the fitting direction. . Therefore,
The fitting connection structure is provided with an appropriate disconnection preventing mechanism for holding the connected state of the conduit or the connecting pipe member. The disengagement prevention mechanism is, for example, provided on the outer peripheral portion of the conduit or the connection pipe member with opposing coupling flange plates fixed in the coupling direction, and coupling the coupling flange plates with a bolt or the like. The separation prevention mechanism is assembled in a state in which one side is integrally formed with the conduit around its circumference, and the other side is frictionally coupled to the conduit so as to be retained.

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 in the connecting portion in order to prevent water leakage from the connecting portion. In the case of the above-mentioned connecting structure such as a cast pipe or a steel pipe, the sealing structure is such that an annular sealing member is inserted between the connecting flange plates and the connecting flange plates are crimped by tightening with bolts so that sealing is performed. ing. In the case of the mating connection structure, the sealing structure is such that a sealing member is attached to the outer peripheral portion on the fitting side, and the sealing member is brought into close contact with the outer circumference of the fitting portion and the inner circumference of the fitting portion to perform sealing. I am trying to be seen.

For example, in Japanese Unexamined Patent Publication No. Hei 10-122455, "Seismic Structure of Pipe Joint", a first conduit having a fitting portion bulging at its end and a coupling flange portion formed integrally with the fitting is inserted. A second conduit is disclosed in which a stopper convex portion is formed on the outer peripheral portion on one end side formed as a portion, and a coupling flange member held by the stopper convex portion is combined. This prior invention discloses a through bolt that holds the fitted state of the second conduit with respect to the first conduit by joining the joining flange portion and the joining flange member, and a push ring member assembled to the through bolt. Has been done. According to the invention of the prior application, the push ring member is moved to the first conduit side by tightening the through bolt and the sealing member is pushed in, whereby the separation between the first conduit and the second conduit is prevented and Make sure that sealing is also performed.

[0009]

By the way, in the above-described conventional separation preventing mechanism, since one coupling flange member is frictionally coupled to the conduit, a large pulling direction with respect to the conduit is provided. However, there is a problem that the second conduit on the fitting side moves in the removal direction when the action is performed, and as a result, a decapitation accident occurs. In the conventional separation prevention mechanism, in order to suppress the movement of the second conduit,
By assembling the coupling flange member so that a part of the conduit is pressed and deformed with a large force, a larger frictional force is generated with the conduit. However, in the conventional separation prevention mechanism, there is a problem in that the internal strain is generated in the conduit, which deteriorates the material and the product life is significantly shortened.

The disconnection prevention mechanism also uses a coupling flange member having a half-divided structure that enables the attachment / detachment operation to / from the conduit, and integrally tightens the bolt and the nut with each half member assembled to the conduit. Be converted.
In such a detachment prevention mechanism, particularly when the coupling flange member is integrated with the resin pipe, the conduit is often greatly deformed due to partial tightening or over-tightening of bolts and nuts due to material characteristics, and cracks occur at this deformed portion. There was a problem that it was easy to be damaged.

For example, in a separation preventing mechanism for a cast iron pipe or the like, a coupling flange member having a plurality of ratchet pawls acting in the coupling direction on the inner diameter portion is also used. In the disengagement prevention mechanism, after the joint flange member and the mating joint flange portion are tightened with a bolt, the bolt provided on the ratchet pawl is tightened. In the disengagement prevention mechanism, this causes each ratchet pawl to bite into the outer peripheral portion of the conduit to fix the conduit to the coupling flange member. In such a separation preventing mechanism, there is a problem that the coating on the surface of the conduit is peeled off by the biting of the ratchet claw, so that the corrosion due to the natural potential difference between the ratchet claw and the conduit progresses and water leakage easily occurs.

In the above-mentioned prior invention, since the separation prevention between the first conduit and the second conduit to be connected and the assembly of the sealing member are performed at the same time, the seismic resistance and the hermeticity are obtained. It has the characteristics of being secured and having good workability. Further, in the invention of the prior application, since the connecting flange member is prevented from coming off by the stopper protrusion,
The load for fixing the connecting flange member to the conduit in the pull-out direction is small.

However, in the invention of the prior application, in the state where the connecting flange member and the push ring member are attached to the second conduit in advance, the through bolt is inserted from the side of the connecting flange member and the stopper nut is attached thereto. After that, the push ring member is penetrated, and a screwing operation to the second coupling flange portion is performed. Therefore, in the invention of the prior application, there is a problem that alignment of each member is troublesome when connecting the conduits in, for example, a narrow and dim excavation trench.

Therefore, it is an object of the present invention to provide a conduit connection device in which a conduit or the like, which is connected by a simple construction with a mating connection structure, can surely hold the connection state and the sealing. Proposed.

[0015]

SUMMARY OF THE INVENTION A conduit connecting device according to the present invention that achieves this object comprises a first mating connection.
And a second conduit. In the conduit connection device, the fitting-side first conduit is provided with a first coupling portion whose removal direction to the tip side is fixed, and the fitting-side second conduit is fixed to the removal direction to the tip side. And a stopper portion between the second joint portion and the tip portion. The conduit connecting device includes a sealing member attached to the fitting portion of the second conduit by stopping the movement in the axial direction by the stopper portion.

According to the conduit connecting device of the present invention configured as described above, the second conduit is connected to the fitting part of the first conduit while being fitted with the sealing member in the fitting part. To be done. According to the conduit connecting device, the first conduit and the second conduit are coupled by the coupling means between the first coupling portion and the second coupling portion, so that the fitting portion is fitted to the fitting portion. The mated state is reliably held and connected. 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.
The sealing between the first conduit and the second conduit is ensured. Therefore, according to the conduit connecting device, the function of preventing separation between the first conduit and the second conduit, and the first conduit
The sealing action between the conduit and the second conduit is surely achieved by the simple structure and the simple work.

Further, the conduit connecting device according to the present invention which achieves the above-mentioned object is a first connecting device which is fitted and connected to each other.
, A second conduit, and a connecting pipe member interposed therebetween. The conduit connection device has a first fitting in which the fitting direction of the conduit or the connection pipe member is fixed in the direction of removal toward the distal end side.
And a second coupling part whose removal direction to the tip side is fixed to the connection pipe member or conduit on the fitting side, and a stopper part between the second coupling part and the tip part. Is provided. The conduit connecting device is configured by mounting a sealing member on the fitting portion of the fitting-side member by stopping movement in the axial direction by a stopper portion.

According to the conduit connecting device of the present invention constructed as described above, the first fitting portion 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.
And the second fitting portions of the conduits are fitted and connected. According to the conduit connecting device, the first conduit and the second conduit are connected to the connecting pipe member by the connecting means between the first connecting portions and the second connecting portions which face each other. Thus, the fitting state of the fitting portion with respect to the fitting portion is securely held and connected. According to the conduit connection device, the sealing member is pressed by the stopper portion as the first fitting portion and the second fitting portion enter into the opposing first fitting portion and second fitting portion, respectively. By sealing between each fitting portion and the fitting portion, the first
The second conduit and the second conduit are securely connected to the connecting pipe member while maintaining the sealing.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The conduit connecting device 1 shown in FIGS. 1 and 2 as the first embodiment of the present invention is
An example applied when 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 sewer 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 or gel. It is applied as a conduit connection device.

The conduit is applicable not only to a straight pipe, but also to a spiral pipe suitable for use in, for example, detour piping and other suitable conduit connections. For the conduit, a resin pipe molded with 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 connection device 1 is applicable not only to conduits made of the same material but also to conduits made of different materials.

The conduit connecting device 1 has a detachment preventing function for holding the fitted state of the first conduit 2 and the second conduit 3 which are connected by a fitting structure as will be described later in detail.
A sealing function for maintaining airtightness, watertightness, etc. between the first conduit 2 and the second conduit 3 is simultaneously achieved. The conduit connecting device 1 includes a first connecting flange portion 4 integrally formed with the first conduit 2, a second connecting flange portion 5 integrally formed with the second conduit 3, and a plurality of Connecting bolt 6
And a tightening nut 7. In the conduit connection device 1, these parts and the stopper projection 9 constitute a separation prevention mechanism that holds the fitted state of the first conduit 2 and the second conduit 3. A first conduit 2 and a second conduit 3 which are matingly connected to the conduit connection device 1.
And are sealed by the sealing member 8. The conduit connection device 1 includes a second conduit 3 and a sealing member 8
A stopper protrusion 9 for pressing is provided.

As shown in FIGS. 1 and 2, the first conduit 2 is fitted with a fitting opening 11a having a large diameter therein by forming a distal end portion 10 over the entire circumference thereof. The part 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 counterpart. As shown in FIG. 2, the fitting portion 11 includes a large-diameter tubular portion 11a at the tip portion and a funnel-shaped cross-section tubular portion 11b that connects the large-diameter tubular portion 11a and the straight pipe portion 2a. Become. In the fitting portion 11, the inner hole of the large-diameter cylindrical portion 11a is the second
Has an inner diameter sufficient to fit the conduit 3 of
It is configured as a tapered hole whose diameter is gradually reduced from the opening toward the inside. Of course, the fitting portion 11 is not limited to such a structure, and for example, the large diameter tubular portion 11
The a may be formed to have the same inner diameter, or the connecting cylinder portion 11b may have a vertical shape.

In the first conduit 2, a disc-shaped first coupling flange portion 4 is integrally formed over the entire circumference at the tip portion of the outer peripheral portion 11c of the large-diameter cylindrical portion 11a. The first coupling flange portion 4 is formed with a number of guide holes 12 penetrating in the thickness direction thereof. The guide holes 12 are provided at equal 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 connecting flange portion 4 has a uniform tightening force in the circumferential direction when the connecting bolt 6 and the tightening nut 7 are connected as will be described later. To be 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 and extremely expensive to integrally form the first coupling flange portion 4 with the fitting portion 11 described above. Therefore, the first conduit 2 made of steel pipe is
Alternatively, an annular coupling flange member may be used as a separate member, and the coupling flange member may have its inner peripheral portion fixed to the outer peripheral portion of the conduit by welding.

The first conduit 2 may be configured such that the entire fitting portion 11 including, for example, the first coupling flange portion 4 is a fitting member which is a separate member. The fitting member has, for example, an inner diameter on the base end side substantially equal to an outer diameter of the straight pipe portion 2a, and an inner peripheral screw formed on the inner peripheral wall of the base end portion is formed on the outer peripheral portion of the straight pipe portion 2a. The first conduit 2 is integrated by being screwed into the peripheral thread. Further, the fitting member may be a member that is fixed to the first conduit 2 in the pull-out direction but is combined in the free direction in the circular direction. By rotating the fitting member with respect to the first conduit 2, the fitting flange portions can be aligned with each other 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 side, a coupling flange member formed in a ring shape by another member is inserted from the other end side. It may be assembled. The first conduit 2 is prevented from coming off from the tip end side by the coupling flange member being locked by the fitting portion 11.

In the first conduit 2, a plurality of strip-shaped or channel-shaped coupling flange convex portions having guide holes are integrally formed on the outer peripheral portion of the fitting portion 11 when sufficient strength conditions are secured. It may be formed. Further, the first conduit 2 may be fixed to the outer peripheral portion of the fitting portion 11 at equal intervals by welding the connecting flange pieces of the separate member having such a shape. In the first conduit 2, these coupling flange convex portions and coupling flange pieces are provided on the outer peripheral portion of the fitting portion 11 at equal intervals.

The second conduit 3 is the straight pipe portion 2 of the first conduit 2.
One end of the same diameter as a is configured as a fitting portion 13 for the fitting portion 11 of the first conduit 2, and the other end side not shown is the same fitting as the fitting portion 11 of the first conduit 2 described above. It is configured as a joint unit. The fitting portion 13 is, when the second conduit 3 is connected to the first conduit 2 as described later, between the large diameter tubular portion 11a and the fitting portion 11 when fitted into the fitting portion 11. As shown in FIG. 2, a circumferential clearance d is formed. The clearance d is equal to
It is the minimum clearance formed between a and the fitting portion 13.

An outer peripheral portion 1 of the fitting portion 13 is attached to the second conduit 3.
As described later, a stopper protrusion 9 that pushes the sealing member 8 into the large-diameter cylindrical portion 11a of the first conduit 2 is integrally formed on the protrusion 3a. The stopper protrusion 9 is the fitting portion 1
3 is integrally formed over the entire circumference with an amount of protrusion equal to or slightly larger than the clearance d. In the second conduit 3, the fitting portion 13 extending from the stopper convex portion 9 to the tip end portion is fitted into the large-diameter cylindrical portion 11a of the fitting portion 11 with an appropriate fitting margin, whereby
Connected to the conduit 2.

In the second conduit 3, a disc-shaped second coupling flange portion 5 is provided over the entire circumference on the outer peripheral portion of the straight pipe portion 3a on the side opposite to the tip end side through the stopper protrusion 9. It is formed so as to integrally project. The second coupling flange portion 5 is formed with a large number of guide holes 14 penetrating in the thickness direction thereof. The respective guide holes 14 are provided at equal intervals in the circumferential direction with respect to the second connecting flange portion 5, and the same number and the same distance as the guide holes 12 of the first connecting flange portion 4 of the first conduit 2 are provided. Are formed to be equal. The second connecting flange portion 5 has the guide holes 14 formed at equal intervals, so that the connecting bolt 6 and the tightening nut 7 can be formed as described later.
A uniform tightening force is generated in the circumferential direction when the connection is made by using. The guide holes 14 may be screw holes into which the coupling bolts 6 are screwed.

In the second conduit 3, for example, when it is a steel tube, it is difficult to integrally form the second coupling flange portion 5 or the stopper convex portion 9 with the fitting portion 13 described above. is there. Therefore, the second consisting of steel tubes
The annular conduit member 3 is combined with an annular stopper member or coupling flange member formed as a separate member, and the inner peripheral portion of the stopper member or the coupling flange member is fixed to the outer peripheral portion of the fitting portion 13 by welding. Composed.

The above-mentioned stopper member and coupling flange member do not necessarily have to be fixed to the outer peripheral portion of the second conduit 3, but they are fixed in the pulling-out direction but are assembled in a circumferentially free state. Good. By rotating the coupling flange member with respect to the second conduit 3, the coupling flange portions can be aligned with each other without rotating the first conduit 2 and the second conduit 3.

The second conduit 3 is provided with a plurality of strip-shaped or channel-shaped coupling flange convex portions having guide holes on the outer peripheral portion of the fitting portion 13 when sufficient strength conditions are secured. May be. In addition, the second conduit 3 may be fixed to the outer peripheral portion of the fitting portion 13 at equal intervals by welding the coupling flange pieces of another member having such a shape. The directions may be combined in a free state. In the second conduit 3, these coupling flange protrusions and coupling flange pieces are provided on the outer peripheral portion of the fitting portion 13 at equal intervals.

A sealing member 8 is attached to the outer peripheral portion 13a of the fitting portion 13 from the tip 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 the outer peripheral portion 13a of the fitting portion 13 is formed.
It is formed into a tubular shape having an inner diameter that is tightly fitted. The sealing member 8 has a thickness such that when the second conduit 3 is connected to the first conduit 2, the fitting portion 1
It is formed to be slightly larger than the clearance d formed between the large-diameter cylindrical portion 11a of No. 1 and the outer peripheral portion 13a of the fitting portion 13, and to maintain the watertightness and airtightness therebetween.

Each connecting bolt 6 connects the first connecting flange portion 4 and the second connecting flange portion 5 in a state in which the second conduit 3 is connected to the first conduit 2 as described later. To do. The connecting bolt 6 has the connecting flange portions 4,
The axis is slightly longer than the facing interval of No. 5, and is made of stainless steel or other metal material or synthetic resin material having mechanical strength and rust resistance. The coupling bolt 6 has a length sufficient to pass through the guide holes 12 and 14 formed in the coupling flange portions 4 and 5, and an outer peripheral thread into which the tightening nut 7 is screwed is formed at the tip portion.

A conduit connection device 1 including the above-mentioned components
In, the fitting portion 13 of the second conduit 3 is fitted and connected to the fitting portion 11 from the tip portion 10 of the first conduit 2. The sealing member 8 is attached to the fitting portion 13 of the second conduit 3 in advance. Sealing member 8
The contact of the insertion end with the stopper protrusion 9 prevents the inward movement. 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 tubular portion 11 of the fitting portion 11 is compressed.
The inner peripheral portion of a and the outer peripheral portion 13a of the fitting portion 13 are sealed.

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

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

In the conduit connection device 1, the first connecting flange portion 4 and the second connecting flange portion 5 are connected by the connecting bolt 6.
And the tightening nut 7 firmly connect the second conduit 3 to the first conduit 2 so that the fitted state of the second conduit 3 is maintained. In the conduit connection device 1, even when a tensile force is applied to the first conduit 2 or the second conduit 3 due to vibration, ground subsidence, or the like, the occurrence of pipe removal or loosening is reliably prevented.

In the conduit connection device 1, the first conduit 2
Since the separation preventing function for maintaining the fitted state and the sealing function for maintaining the watertightness and airtightness between the second conduit 3 and the second conduit 3 simultaneously function, the structure is simple and the workability is excellent. ing. According to the conduit connection device 1, the first
Since the conduit 2 and the second conduit 3 have a structure in which a large force that distorts them is not applied, the deterioration of the material, the damage, the deformation or the cracking due to the internal strain is suppressed. According to the conduit connection device 1, even when applied to a coated metal conduit, the coating is not peeled off, so that the occurrence of corrosion due to the natural potential difference between different metals can be prevented.

In the conduit connecting device 20 shown in FIGS. 3 and 4 as the 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 configuration that is assembled in. Since the conduit connection device 20 has the same structure as the above-described conduit connection device 1 in other respects, detailed description thereof will be omitted by assigning the same reference numerals to corresponding parts. The conduit connection device 20 is preferably used in a case where the second conduit 3 is cut to an appropriate length in a field installation work, etc.

In the second conduit 3, the outer peripheral portion 1 of the fitting portion 13 is provided.
A fitting groove 23 for assembling a later-described stopper member 22 and fixing it in the axial direction is provided in 3a. The fitting concave groove 23 is formed so that the distance from the tip is equal to that of the stopper convex portion 9 of the conduit connection device 1 described above. That is, the fitting recessed groove 23 pushes the sealing member 8 into the outer peripheral portion 13a of the fitting portion 13 such that the sealing member 8 is inserted into the fitting portion 11 of the first conduit 2 with a distance from the tip end thereof. It is recessed over the entire circumference so as to correspond to a sufficient position. When the second conduit 3 is cut to an appropriate length for use in the field and used, the fitting groove 23 is formed by grooving on site.

The coupling flange member 21 is an annular disc member having a central hole 21a having an inner diameter that can be inserted into the straight pipe portion 3a of the second conduit 3, and is made of a metal material, a synthetic resin material or the like. ing. The coupling flange member 21 is provided with a number of guide holes 24 penetrating in the thickness direction thereof at equal intervals in the circumferential direction. The guide holes 24 are formed in the same number as the guide holes 12 of the first coupling flange portion 4 of the first conduit 2 and at equal intervals. By forming the guide holes 24 at equal intervals, the coupling flange member 21 generates a uniform tightening force in the circumferential direction when the coupling bolt 6 and the tightening nut 7 are coupled. . In addition, each guide hole 24
With respect to, a screw hole into which the coupling bolt 6 is screwed may be formed.

The stopper member 22 is made of a spring steel material or a synthetic resin material having mechanical rigidity and elasticity,
In a natural state, both end portions 22a and 22b are formed in an annular shape that is butted against each other. The stopper member 22 is
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,
The 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 while being fitted in the fitting groove 23, the respective butting ends are joined by bolts to be integrated. You may Further, the stopper member 22 is composed of, for example, two semicircular arc-shaped divided bodies, but one end sides of the divided bodies facing each other may be openably and closably coupled by a hinge mechanism. The stopper member 22 is fitted in the fitting groove 23 with the split body opened, and then the butt ends on the other end side are joined by bolts to be integrated.

The stopper member 22 configured as described above
As shown by the chain line in FIG. 3, the both ends 22a, 22b are expanded in diameter to be fitted into the fitting portion 13 from the front side and then fitted into the fitting concave groove 23. Stopper member 2
In the state of being fitted in the fitting concave groove 23, 2 returns to a natural state, and its inner peripheral portion is fitted in the fitting concave groove 23 as shown in FIG. As shown in the figure, the outer peripheral portion of the stopper member 22 is projected and exposed from the outer peripheral portion 13a of the fitting portion 13 over the entire circumference. The stopper member 22 is similar to the stopper protrusion 9 of the conduit connection device 1 described above, and the fitting portion 1 is provided.
A convex portion is formed on the outer peripheral portion 13 a of No. 3.

In the conduit connection device 20, the fitting part 13 of the second conduit 3 with the sealing member 8 fitted is connected to the fitting part 11 from the tip part 10 of the first conduit 2. To be done. The sealing member 8 is attached to the fitting portion 13 of the second conduit 3 in advance. In the conduit connection device 20, the coupling bolts 6 are inserted from the first conduit 2 side into the respective guide holes 12 of the first coupling flange portion 4. The tip of the coupling bolt 6 penetrates the guide hole 24 of the coupling flange member 21 to be exposed. A tightening nut 7 is screwed into the connecting bolt 6 at the exposed end.

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

In the conduit connection device 20, the first connecting flange portion 4 and the connecting flange member 21 are connected by the connecting bolt 6.
And the tightening nut 7 firmly connect the second conduit 3 to the first conduit 2 so that the fitted state of the second conduit 3 is maintained. 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, ground subsidence, or the like, the occurrence of pipe removal or loosening can be reliably prevented. .

In the conduit connection device 20, as in the case of the conduit connection device 1 described above, the separation preventing function for maintaining the fitted state between the first conduit 2 and the second conduit 3 and the watertightness and airtightness. The sealing action that retains the sexuality simultaneously functions. According to the conduit connecting device 20, the first conduit 2 and the second conduit 2
Since a large force that distorts the conduits 3 is not applied to the conduit 3, the occurrence of material deterioration, damage, deformation or cracking due to internal strain is suppressed. According to the conduit connection device 20, even when it is applied to a coated metal conduit, the coating is not peeled off, so that the occurrence of corrosion due to the natural potential difference between different metals can be prevented.

According to the conduit connection device 20, even when the second conduit 3 is cut to an appropriate length due to the site, the fitting concave groove 23 is formed in the fitting portion 13 and the coupling flange is formed. By assembling the member 21, the separation prevention function and the connection with the first conduit 2 that maintains watertightness and airtightness are possible. Therefore, according to the conduit connection device 20, it is not necessary to prepare a conduit having a predetermined length in advance by, for example, a preliminary survey, and the workability can be further improved.

As the conduit, those made of various materials are used as described above, and the connecting structure is also various. The conduit connection device 30 shown in FIG. 5 as the third embodiment of the present invention is, for example, a second conduit in contrast to a first conduit 31 in which a connecting flange portion forming a connecting structure is not integrally formed. It is applied when 3 are fitted and connected. Since the conduit connection device 30 is similar to the above-described conduit connection device 1 except for the configuration other than the first conduit 31, detailed description thereof will be omitted by assigning the same reference numerals to corresponding parts.

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

A coupling flange member 34, which is a separate member, is attached to the straight pipe portion 31a of the first conduit 31 afterwards, and is fixed by the fitting portion 33. The coupling flange member 34 includes a semi-circular first ring half 35.
It is constituted by a so-called half structure in which a is divided into a second ring half body 35b. First ring half 3
5a and the second ring half 35b (hereinafter, ring half 35
Collectively. ) Are formed in the same shape as each other, and have a semi-cylindrical base portion 36, a coupling flange portion 37 integrally provided on the distal end side of the outer peripheral portion of the base portion 36, and the base portion 36 and the coupling flange portion 37. And a connecting portion 38 that is integrally provided so as to project orthogonally to the end portions of and.

The ring half body 35 has a base portion 36 whose inner diameter is substantially equal to the outer diameter of the straight pipe portion 31a.
It is assembled so as to be in close contact with the outer peripheral portion of 1a. In the ring half body 35, the inner diameters of the pair of base portions 36, 36 that are cylindrical in the combined state are smaller than the outer diameter of the large-diameter cylindrical portion 33 a of the fitting portion 33. The ring half 35 has a plurality of guide holes 3 in the coupling flange 37.
9 are formed at equal intervals, and mounting holes 40 are formed in the connecting portion 38.

A pair of ring halves 35 are combined with the first conduit 31 so as to sandwich the straight pipe portion 31a, and the connecting bolts 41 and nuts in which the opposing connecting portions 38 are inserted into the mounting holes 40. (Not shown) are integrated with each other to form the coupling flange member 34. The coupling flange member 34 is prevented from coming off toward the tip side by the abutting of the base portion 36 of each ring half body 35 with the large-diameter cylindrical portion 33a. Therefore, the coupling flange member 3
Even when the first conduit 31 has a long axis or is buried or otherwise difficult to insert from the other end side, it is possible to easily carry out the mounting operation at an arbitrary position on the way. is there.

Regarding the coupling flange member 34,
As described above, the pair of ring halves 35 are completely divided into two.
Alternatively, the ring halves 35 may be integrally formed of, for example, a synthetic resin, and the ring halves 35 may be connected by thin hinge portions.

In the conduit connection device 30, the connecting flange member 34 having a half-split structure is attached to the first conduit 31, but the connecting flange member 34 having the same half-split structure as the second conduit 3 has the same structure. You may make it attach a coupling flange member. That is, the coupling flange member having the half-split structure is used not only in one of them but also in both of them depending on the structure of the first conduit and the second conduit to be fitted or the connecting pipe member described later.

In the conduit connection device 30, the fitting part 13 of the second conduit 3 having the sealing member 8 fitted therein is connected to the fitting part 33 from the tip part 32 of the first conduit 31. To be done. In the conduit connection 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 of the coupling flange member 34. In the conduit connection device 30, the tip of each coupling bolt 6 is exposed through the guide hole 14 of the coupling flange portion 5 of the second conduit 3, and the tightening nut 7 is screwed into this exposed end.

In the conduit connection device 30, as the tightening nut 7 is screwed in, the coupling flange member 34 moves toward the distal end side along the straight pipe portion 31a and collides with the large diameter cylindrical portion 33a of the fitting portion 33. To do. In the conduit connection device 30, the second flange 3 is connected to the first conduit pipe 33 by locking the movement of the coupling flange member 34 toward the distal end side by the large-diameter cylindrical portion 33a.
It gradually moves to the conduit 31 side. In the conduit connection device 30, the sealing member 8 is pressed by the stopper member 9 as the second conduit 3 moves, and the first conduit 31
It enters into the fitting portion 33 while being compressed. In the conduit connection device 30, the sealing member 8 has the fitting portion 3
3, the inner surface of the large diameter cylindrical portion 33a and the outer peripheral portion 13a of the fitting portion 13
The close contact between and ensures a reliable seal between them.

According to the conduit connecting device 30, the connecting flange member 34 can be assembled from an arbitrary position even with respect to the first conduit 31 in which the connecting flange portion forming the separation preventing mechanism is not integrally formed. To be done. Conduit connection device 30
According to this, the fitting flange 33 is used to prevent the coupling flange member 34 from being pulled out from the first conduit 31. According to the conduit connection 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, damage, deformation or cracking due to internal strain. . According to the conduit connection device 30, even when applied to a coated metal conduit, the coating is not peeled off, so that corrosion due to the natural potential difference between different metals can be prevented. Conduit connection device 30
Has the same effect as each of the above-described embodiments.

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

According to the conduit connecting device 50, the first conduit 5
As described above, the coupling flange member 34 having a half-split structure is assembled to the No. 1 at an arbitrary position of the straight pipe portion 31a by an extremely simple operation. Conduit connection device 5
According to 0, the stopper member 22 is assembled to the second conduit 52 in the fitting groove 23 formed in the fitting portion 13 as described above by an extremely simple operation. Therefore, the conduit connection device 50 is applied to the first conduit 51 and the second conduit 52 of the existing fitting structure that does not include the separation prevention mechanism, and thus the reliable separation prevention function and the sealing function are achieved. Then the connection is made.

In the conduit connection device 50, the second
Ring-shaped coupling flange member 21 for the conduit 52 of
However, the stopper member 22 inserted from the tip side prevents the stopper member 22 from being pulled out. In the conduit connection device 50, for example, the coupling flange member 21 is also formed of a half-structure similar to the first conduit 51 side, and is located inside the stopper member 22 fitted in the fitting groove 23. Of course, it may be assembled to the second conduit 52.

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

For this reason, the stopper member 22 is formed so 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. 7A, so that the pressing surface 22c that presses the sealing member 8 has a larger contact area with the vertical surface. It will be composed of a circular arc surface.

The stopper member 22 is formed so as to have a substantially D-shaped cross section as shown in FIG. 7B, and the second conduit is formed so that the side surface on the arc side is the pressing surface 22c. You may make it attach to 3. Stopper member 22
In the above, the pressing surface 22c is constituted by an arc surface that ensures a larger contact area with 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 with a cross-sectional shape having a polygonal 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 that ensures a larger contact area with the vertical surface.

In each of the above-mentioned embodiments, the fitting portion of the first conduit is fitted to the fitting portion of the second conduit to be connected, but the present invention is not limited to this mode. Not something. In the present invention, a connecting pipe member is interposed between the first conduit and the second conduit, and the first conduit and the connecting pipe member and the connecting pipe member and the second conduit are fitted and connected, respectively. It also applies to the conduit connection device.

In a conduit connection 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, which are butted against each other, have a connection pipe member 63. Connected by. The conduit connection device 60 is not only a conduit in which the first conduit 61 and the second conduit 62 are separately piped, but also a conduit in which water is leaked due to breakage or the like between them and the broken part is cut off. Good.

The conduit connecting device 60 is not only a conduit in which the first conduit 61 and the second conduit 62 are opposed to each other in a substantially straight line, but also a conduit in which the first conduit 61 and the second conduit 62 are curved or are connected at an appropriate angle. May be In this case, the connecting pipe member 63 is
Although not described in detail, the middle portion is curved 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 various materials described above are used.

As will be described later, the first conduit 61 is fitted over the entire circumference of the outer peripheral portion 61b at a predetermined distance from the tip end portion 61a so that the fitting margin for the connecting pipe member 63 is maintained. A mating groove 64 is provided as a recess. First conduit 6
An annular first stopper member 65 is fitted into the fitting groove 1 such that the outer peripheral portion of the fitting groove 64 is exposed to the outside. 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 thereof like the stopper member 22 described above. The first stopper member 65 is assembled in the fitting groove 64 from the outside of the first conduit 61 by expanding both ends. In addition, it goes without saying that the first conduit 61 may have a stopper projection integrally formed on the outer peripheral portion 61b over the entire circumference thereof.

A first coupling flange member 66 is attached to the outer periphery 61b of the first conduit 61, which is located on the opposite side of the tip 61a with the first stopper member 65 interposed therebetween. The first coupling flange member 66 is made of an annular disc member having a central hole 66a and is made of a metal material, a synthetic resin material, or the like. First coupling flange member 66
The central hole 66a has an inner diameter slightly larger than the outer diameter of the first conduit 61, so that the central hole 66a can be inserted into the outer peripheral portion 61b of the first conduit 61.

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

The second conduit 62 is also the first conduit 6 described above.
It is configured in the same manner as 1 and has a fitting recessed groove 6 over the entire circumference in the outer peripheral portion 62b at a predetermined distance from the tip portion 62a so that the fitting margin for the connecting pipe member 63 is maintained.
7 is recessed. An annular second stopper member 68 is fitted to the second conduit 62 such that the outer peripheral portion of the fitting groove 67 is exposed to the outside. 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 thereof like the first stopper member 65 described above. Second
The stopper member 68 of the second conduit 62 has its both ends expanded.
Is fitted into the fitting groove 67 from the outside. The second
It is needless to say that the conduit 62 may have a stopper projection integrally formed on the outer peripheral portion 62b over the entire circumference thereof.

A second coupling flange member 69 is attached to the outer peripheral portion 62b of the second conduit 62, which is located on the opposite side of the tip portion 62a with the second stopper member 68 interposed therebetween. The second coupling flange member 69 is an annular disc 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 central hole 69a has an inner diameter slightly larger than the outer diameter of the second conduit 62, so that the central hole 69a can be 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, the second coupling bolts 74 are inserted into the respective guide holes 69b, so that the second fastening nuts 75 and the second fastening nuts 75 are coupled to the connection pipe member 63. Each guide hole 69b
Are arranged at equal intervals so that a uniform tightening force is generated in the circumferential direction. The guide holes 69b may be screw holes into which the second coupling bolts 74 are screwed.

The above-mentioned first conduit 61 has a tip portion 61.
From the a side to the outer peripheral portion 61b, the first sealing member 7 is provided.
0 is installed. The first sealing member 70 is made of an elastic material such as rubber or synthetic rubber having watertightness and airtightness.
It is formed in a tubular shape having an inner diameter that is tightly fitted to the outer peripheral portion 61b of the first conduit 61. The first sealing member 70 includes the first conduit 61 and the connecting pipe member 6 which are fitted to each other.
It has a thickness that is slightly larger than the clearance formed between the mating portions with 3.

A second sealing member 71 is also attached to the outer peripheral portion 62b of the second conduit 62 from the tip portion 62a side. The second sealing member 71 is also the above-described first
Similarly to the sealing member 70 of FIG. 2, the second conduit 62 is made of an elastic material having watertightness and airtightness, such as rubber or synthetic rubber.
Is formed into a tubular shape having an inner diameter that is tightly fitted to the outer peripheral portion 62b. 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 cylinder in which first fitting ports 78a are opened at both ends of a connecting cylinder part 76 having substantially the same diameter as that of the first conduit 61 and the second conduit 62. Part 77a
And the second fitting tubular portion 7 in which the second fitting port 78b is opened.
7b and 7b are integrally formed. Connection pipe member 6
3, the first coupling flange portion 79a is integrally projectingly formed on the outer peripheral portion of the first fitting tubular portion 77a over the entire circumference, and is formed on the outer peripheral portion of the second fitting tubular portion 77b. The second coupling flange portion 79b is integrally formed so as to project over the entire circumference.

Each fitting cylindrical portion 77 has a large diameter fitting opening 78 formed therein by bulging the tip of the connecting cylindrical portion 76 over the entire circumference. Each fitting tubular portion 77 is
The inner diameter of the fitting port 78 is the first conduit 61 and the second conduit 62.
The outer diameter is larger than the outer diameter of
a and 62a are fitted together with appropriate clearances. Each fitting cylinder 77 is sealed by the above-mentioned respective sealing members 70 and 71 with which the clearance is filled in a state where the first conduit 61 and the second conduit 62 are fitted to the fitting port 78 as described later. To be done.

Each coupling flange portion 79 has a corresponding fitting tubular portion 77.
It is a disc-shaped portion integrally formed on the tip portion of the whole circumference. Each of the coupling flange portions 79 has a plurality of guide holes 80a and 80b penetrating in the thickness direction thereof. The guide holes 80 are provided at equal intervals in the circumferential direction with respect to the coupling flange portions 79, and are coupled by a coupling bolt 72 and a tightening nut 73 or a coupling bolt 74 and a tightening nut 75, as will be described later. When performing, an even tightening force is generated in the circumferential direction. The guide holes 80 may be screw holes.

In the connecting pipe device 60 including the above-mentioned members, the connecting pipe member 63 is fitted with the first fitting tubular portion 77a and the distal end portion 61a of the first conduit 61. At the same time, the tip end portion 62a of the 21st conduit 62 is fitted and connected to the second fitting tubular portion 77b. In the connecting pipe device 60, the fitting state and the sealing state of the first conduit 61 and the connecting pipe member 63 and the fitting state and the sealing state of the second conduit 62 and the connecting pipe member 63 are reliably held. . The connecting pipe device 60 includes a first conduit 61.
The connection operation between the first conduit 61 and the connection pipe member 63 will be described below because 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. And explain.

In the connecting pipe device 60, the first conduit 6
1, the first sealing member 70 is attached to the outer peripheral portion 61b by being inserted from the front end portion 61a thereof. The first sealing member 70 is attached to the first conduit 61 in a state in which the insertion end of the first sealing member 70 is in contact with the first stopper member 65 and thus is prevented from moving inward. In the connecting pipe device 60, as the first conduit 61 is pushed into the first fitting tubular portion 77a of the connecting pipe member 63, the first sealing member 70 is compressed in the thickness direction and the first conduit is formed. 61
The outer peripheral portion 61a and the fitting opening 78a are sealed.

In the connecting pipe device 60, the first connecting flange member 66 is provided with respect to the first conduit 61 so that the guide hole 66 b is formed in the first connecting flange portion 79 of the connecting pipe member 63.
The position adjustment is performed so as to match the guide holes 80a of a. In the connecting pipe device 60, the first coupling bolts 72 are inserted into the guide holes 66b of the first coupling flange member 66, respectively. First coupling bolt 72
Each of the tips is exposed by penetrating the guide hole 80a of the first coupling flange portion 79a. First connecting bolt 7
The first tightening nut 73 is screwed into the exposed end of the second screw 2.

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 side and is locked by abutting against this. It In the connection pipe device 60, the connection pipe member 63 is gradually moved to the first conduit 61 side by further screwing the first tightening nut 73.

The first sealing member 70 has its tip end abutted against the first stopper member 65 as the connecting pipe member 63 moves, and is locked, but the rear end side is further pressed to connect. The pipe member 63 enters the first fitting cylinder portion 77a while being compressed. The sealing member 70 is thereby brought into close contact with the inner surface of the fitting tubular portion 77a of the connecting pipe member 63, and its fitting inlet 78a and the outer peripheral portion 61b of the first conduit 61 are provided.
Make sure to seal between and.

In the conduit connection device 60, since 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, The fitting connection state between the first conduit 61 and the connecting pipe member 63 is reliably maintained. In the conduit connection device 60, even when a tensile force is applied between the first conduit 61 and the connection pipe member 63 due to vibration, ground subsidence, or the like, the occurrence of pipe removal or loosening is reliably prevented.

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

In the conduit connection device 60, a disconnection preventing function for maintaining the fitting connection state of the first conduit 61 and the second conduit 62 to the connecting pipe member 63 and a sealing action for maintaining watertightness and airtightness are provided. Since they function simultaneously, the structure is simple and the workability is excellent.
According to the conduit connection device 60, the first conduit 61, the second conduit 62, or the connection pipe member 63 has a connection structure in which a large force that distorts them is not applied. The occurrence of damage, deformation, cracking, etc. is suppressed. According to the conduit connection device 60, even when applied to a coated metal conduit, the coating is not peeled off, so that corrosion due to the natural potential difference between different metals can be prevented.

The present invention is directed to the connecting pipe member 63 having the above structure.
The structure is not limited to the connection structure using, but may be configured in various modes depending on the structure of the conduit. The connecting pipe member 63 is integrally formed with the connecting flange portion 76, but the connecting flange member 77 may be assembled with a connecting flange member having a half-split structure, for example. The conduit connecting device 60 connects the first conduit 61 and the second conduit 62 to the connecting pipe member 63 by separate connecting bolts and tightening nuts. For example, the first connecting flange member is used. 6
6, the first coupling flange portion 79a, the second coupling flange portion 79b, and the second coupling flange member 69 may be collectively coupled by a coupling bolt that communicates.

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

The connecting pipe member 63 has a first outer diameter of the same outer diameter.
The conduit 61 and the second conduit 62 are connected, but they are also used when connecting conduits having different outer diameters. Of course, in this case, the inner diameter or the outer diameter of both ends of the connecting pipe member 63 is adapted to the specifications of the conduit to be connected.

The conduit connection device 90 shown in FIGS. 9 and 10 as the sixth embodiment of the present invention is preferably used for connection between the first conduit 91 and the 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 retrofitted to the fitting portion 92a. The configurations of the second conduit 92 and the stopper member 93, which will be described later, are 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 is constructed in the same manner as the first conduit 2 of the conduit connecting device 1 described above, and the other structure except the second conduit 92 and the stopper member 93. Since the members are the same as those in each of the above-described embodiments, the corresponding parts will be denoted by the same reference numerals and detailed description thereof will be omitted. The conduit connection device 90 is
The coupling structure and the like shown in each of the above-described embodiments for the coupling portion and the like may be appropriately adopted.

In the second conduit 92, a first fitting concave groove 94 and a second fitting concave groove 95 are formed on the outer peripheral portion of the fitting portion 92a. First fitting groove 94 and second fitting groove 95
Are formed at different positions with respect to the axial direction, in other words, within 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 concave groove 95 is also composed of a plurality of concave portions formed along the same circumference c2, and these concave portions are arranged in the circumferential direction with the concave portions of the first fitting concave groove 94, respectively. In contrast, 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 are formed on the outer peripheral portion of the fitting portion 92a.

Similar to the stopper member 22 described above, the stopper member 93 is made of a spring steel material or a synthetic resin material having mechanical rigidity and elasticity as a material, and has an annular shape in which both end portions 93a and 93b are butted 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. In the natural state, the stopper member 93 has an inner diameter substantially equal to the outer diameter of the fitting portion 92a.

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

The stopper member 93 is formed of, for example, two semicircular arc-shaped divided bodies based on the above-described configuration as a basic form, and is joined to the outer peripheral portion of the fitting portion 92a, and the butt ends of the divided bodies are joined together. The parts may be connected by bolts to be integrated. Further, the stopper member 93 is composed of, for example, two semi-circular arc-shaped divided bodies, but the opposing one ends of these divided bodies may be openably and closably coupled 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 divided body is opened, and then the butt end portions on the other end side are joined by bolts to be integrated.

The conduit connection device 90 constructed as described above
According to the above, the stopper member 93 has the two end portions 93a, 93b.
The diameter is increased so that the fitting portion 92a is assembled from the front side. The stopper member 93 includes the first fitting protrusion 96.
And the convex portions of the second fitting convex portion 97 are respectively fitted into the concave portions of the first fitting concave groove 94 and the second fitting concave groove 95 which face each other, and the natural state is restored. The body part of the stopper member 93 is projected and exposed from the outer peripheral portion of the fitting portion 92a over the entire circumference. According to the conduit connection device 90, the first conduit 91 and the second conduit 91
The stopper member 93 acts as a pushing member of the sealing member 8 in the state of being connected to the conduit 92 of the sealing member 8 as in the above-described respective embodiments.

In the conduit connecting device 90, the first fitting concave groove 94 and the second fitting concave groove 95 whose axial positions are different from each other.
Since the first fitting protrusion 96 and the second fitting protrusion 97 are fitted to each other, the stopper member 93 is fitted into the fitting portion 92a.
Be assembled into. Therefore, in the conduit connection 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 connection device 90, since the second conduit 92 is not formed with a groove having a large depth, the second conduit 92 is not formed.
Will be retained. The conduit connection device 90 is
It is preferably used for connecting the large-diameter first conduit 91 and the second conduit 92.

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

In the conduit connection device 90, for example, the first fitting concave groove 94 and the second fitting concave groove 95 are formed over the entire outer circumference of the fitting portion 92a of the second conduit 92. The first fitting convex portion 96 and the second fitting convex portion 97 may be a convex portion formed along the entire circumference on the inner peripheral portion of the stopper member 93 while being constituted by a concave groove. . Further, in the conduit connection device 90, since the stopper member 93 may be fixed in the axial direction and may be free in the circumferential direction,
You may comprise only the 1st fitting convex part 96 and the 2nd fitting convex part 97 side by several convex parts, respectively. Further, in the conduit connection device 90, the fitting convex portion may be formed on the fitting portion 92a side and the fitting concave groove may be formed on the stopper member 93 side.

By the way, in the conduit connecting device, the fitting amount of the second conduit into the first conduit is appropriately determined depending on the outer diameter of each conduit, material specifications, laying specifications, site conditions, and the like. In the conduit connection device, as described above, the stopper member is fixed to the second conduit or the connection pipe member in the axial direction and assembled, so that the sealing member is sufficiently pushed in when the difference in the amount of fitting is large. Is insufficient, or the sealing member is cut into an appropriate length.

Therefore, according to the conduit connecting device 100 shown in FIG. 11 as the seventh embodiment of the present invention, even if the fitting amount to the first conduit is different, the second conduit 1 is different.
It is characterized in that the stopper member 102 can be assembled at an optimum position with respect to 01. Therefore, 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 in the outer peripheral portion of the fitting portion 101a. Since other configurations of the conduit connection device 100 are similar to those of the above-described embodiments, the corresponding parts are denoted by the same reference numerals and detailed description thereof will be omitted. For the conduit connection device 100, the configurations and members of other parts, and the parts and members described in each of the above-described embodiments are appropriately used.

That is, in the second conduit 101, the first fitting concave grooves 103 parallel to each other at different axial positions are provided.
And the second fitting concave groove 104 are formed over the entire circumference of the outer peripheral portion of the fitting portion 101a. In the second conduit 101,
As described above, the stopper member 102 is assembled from the tip end side of the fitting portion 101a, and the stopper member 102 is fitted into either the first fitting concave groove 103 or the second fitting concave groove 104. Fix it. When the fitting amount of the second conduit 101 is smaller than that of the first conduit 101, the stopper member 102 is relatively fitted to the first fitting concave groove 103 and assembled. When the fitting amount of the second conduit 101 is larger than that of the first conduit 101, the stopper member 102 is relatively fitted to the second fitting concave groove 104 and assembled.

Therefore, in the conduit connection device 100, the stopper member 102 is attached to the outer peripheral portion of the fitting portion 101a according to the fitting amount of the second conduit 101 into the first conduit, so that the stopper member 102 is Make sure that the sealing member is pushed into the first conduit in good condition. The conduit connecting device 100 has the stopper member 10 that is optimally aligned as the second conduit 101 is pushed into the fitting part 101a with respect to the first conduit.
2 pushes the sealing member into the first conduit,
Inner peripheral portion of the first conduit and fitting portion 101 of the second conduit 101
Seal with a.

The structure of the second conduit 101 described above is, of course, applied to the connecting pipe member. In addition, the second conduit 101 is attached to the outer peripheral portion of the fitting portion 101a.
Although the mating recessed grooves 103 and 104 are formed, it is needless to say that the number thereof is not limited.

Although a disc-shaped coupling flange portion is formed on each of the above-mentioned conduits and connecting pipe members, it is needless to say that the shape is not limited to such a shape. The connecting flange is
For example, in the case of a small-diameter conduit or the like in which the number of connecting points may be small, it may be a quadrangle with guide holes provided at the four corners, which facilitates manufacture, or may be formed in an appropriate polygonal shape. Similarly, the shape of the coupling flange member is not limited to the disc shape. Further, the stopper portion and the stopper member may also be formed in an appropriate outer shape.

[0110]

As described in detail above, according to the conduit connecting device of the present invention, the conduit or the connecting pipe member to be fitted and connected is connected to the connecting portion formed opposite to each other. The connection state is surely maintained by being coupled by, and the sealing member that seals the connection portion is pushed into the conduit or the connection pipe member in accordance with the coupling operation to perform reliable sealing. Therefore, according to the conduit connection device, even when a large load is applied to the conduit or the connection pipe member connected by simple construction by fitting in the pulling direction, the connection state can be reliably maintained, The reliability will be improved, and the work efficiency will 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 due to internal strain or the like, damage, or corrosion due to natural potential difference can be suppressed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of a conduit connection device shown as a first embodiment of the present invention.

FIG. 2 is a vertical cross-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 a shape explanatory view of a stopper member provided in the conduit connection device.

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

FIG. 9 is a longitudinal sectional view of an essential part of a conduit connection 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 essential parts of a conduit connection device shown as a seventh embodiment of the present invention.

[Explanation of symbols]

1 conduit connection device, 2 first conduit, 3 second conduit,
4 coupling flange part, 5 coupling flange part, 6 coupling bolt, 7 tightening nut, 8 sealing member, 9 stopper convex part, 11 fitting part, 13 fitting part, 20 conduit connection device, 21 coupling flange member, 22 stopper member, 23 Fitting groove, 30 Conduit connection device, 31 1st
Conduit, 33 fitting portion, 34 coupling flange member, 35
Ring half, 37 coupling flange part, 60 conduit connection device, 61 first conduit, 62 second conduit, 63 connection pipe member, 64, 67 fitting groove, 65, 68 stopper member, 66, 69 coupling flange Member, 70,71 sealing member, 72,74 coupling bolt, 73,75
Tightening nut, 77 Fitting cylinder part, 78 Fitting port, 79
Coupling flange portion, 90 Conduit connection 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 groove

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 2000-9274 (JP, A) JP 10-122455 (JP, A) JP 9-170686 (JP, A) JP 11-63325 (JP, A) Actual development Sho 52-123323 (JP, U) Actual development Sho 51-140219 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 21/02 F16L 1 / 024 F16L 21/08

Claims (10)

(57) [Claims] 1. A conduit connection device comprising a first conduit and a second conduit fitted together for connection, wherein the first conduit on the fitting side is fixed to the first conduit with the direction of removal to the distal end side fixed. In addition to providing the connecting portion, the second conduit on the insertion side is provided with the second connecting portion whose removal direction to the tip side is fixed, and the stopper portion is provided between the second connecting portion and the tip portion. 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 above-mentioned second conduit is maintained in the mating connection state by connecting the first connecting portion and the second connecting portion by the connecting means, and the sealing member is pressed by the stopper portion. And above the first conduit and the second Conduit connection apparatus characterized by sealing in close contact between the conduit. 2. A conduit connecting device in which a first conduit, a second conduit, and a connecting pipe member interposed therebetween are fitted and connected to each other. The member is provided with a first coupling portion whose removal direction to the tip side is fixed, and the connection pipe member or conduit which is the fitting side is provided with a second coupling portion whose removal direction to the tip side is fixed. With this second
A stopper portion is provided between the connecting portion and the tip end portion of the fitting side member, 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 fitted to the first joining portion and the second joining portion by joining means to hold the fitting connection state, and The conduit connection device, wherein the sealing member is pressed by the stopper portion to closely contact and seal between the fitting side member and the fitting side member. 3. The stopper portion is a fitting concave groove formed in an outer peripheral portion of each of the conduits or the connecting pipe member, and a stopper fitted in the fitting concave groove to lock the movement in the axial direction. The conduit connection device according to claim 1, wherein the conduit connection device is configured by a member. 4. The stopper member is an annular body whose both ends are abutted with each other, and the diameter of the stopper member can be expanded by expanding the end portions of the stopper member. The conduit connection device according to claim 3, wherein the conduit connection device is assembled to an outer peripheral portion, and is fitted in the fitting recessed groove to reduce the diameter and lock the movement in the axial direction. 5. The stopper member is divided into a plurality of pieces, and each divided body is fitted into the fitting concave groove to be combined with an outer peripheral portion of the conduit or the connecting pipe member, and then integrated with each other. The conduit connection device according to claim 3, wherein the conduit connection device is coupled. 6. The fitting recessed groove is composed of a plurality of grooves formed at different positions in the axial direction on the outer peripheral portion of the conduit or the connecting pipe member, and the stopper member is provided on the fitting side member. The conduit connection device according to claim 3, wherein the fitting-side member is selected and fitted in accordance with a fitting amount of the fitting-side member. 7. The stopper portion includes a plurality of fitting concave grooves formed in an outer peripheral portion of each of the conduits or the connecting pipe member,
3. A stopper member having a plurality of fitting projections formed in the inner circumferential portion, the fitting projections being fitted into the fitting recessed grooves, respectively. The conduit connection device according to. 8. The fitting concave grooves are formed on the outer peripheral portion of the conduit or the connecting pipe member in a staggered arrangement in the axial direction, and the fitting convex portions are formed on the inner circumference of the stopper member. The conduit connection device according to claim 7, wherein the conduit connection devices are formed in a staggered arrangement in the portion. 9. The conduit connection device according to claim 1, wherein a side surface portion of the stopper portion that presses the sealing member is formed in a convex shape. 10. Each of the coupling portions is a separate member that is retrofitted to the outer peripheral portion of the conduit or connecting pipe member, and is divided into a plurality of members, and each divided body is the outer periphery of the conduit or connecting pipe member. The conduit connection device according to any one of claims 1 to 5, wherein the conduit connection device is combined with the parts and then integrally connected.