JP2000337574A - Spiral pipe connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting device favorably applicable to a piping device using spiral pipes and capable of certainly connecting a spiral pipe with a conduit through a simple operation. SOLUTION: The spiral pipe connecting device is composed of a connecting pipe body member 21 which is at one end furnished consolidatedly with a cylindrical conduit connection part 30 where a conduit 10 is connected and at the other end, with a semi-cylindrical spiral pipe connecting half-body part 31 consolidatedly, a spiral pipe connecting half-body member 22 in semi-cylindrical shape, and a sealing member 23. The spiral pipe connecting half-body part 31 and spiral pipe connecting half-body member 22 are provided on the inside surfaces with spiral pipe engaging projections 36 and 42 to be engaged with the spiral groove 5 of each pipe 1 so as to prevent its slipping off and consolidated by butting together joining pieces 35 and 41 formed in the axial direction on the peripheral surfaces and coupling together so that an intended spiral pipe connection part is completed. The sealing member 23 seals the joining parts of the periphery of the spiral pipe 1 connected to the spiral pipe connection part with the spiral pipe connecting half-body part 31 and spiral pipe connecting half-body member 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case where a spiral pipe is connected to a water and sewage pipe, a gas pipe, or a conduit for transporting various fluids, for example, a pipe for bypassing an obstacle or the like existing on an installation route. The present invention relates to a helical pipe connection device suitably used for, for example, a spiral pipe connection device.

[0002]

2. Description of the Related Art For example, pipes such as water pipes, sewage pipes, and gas pipes are often subjected to bypass piping work for bypassing existing obstacles. The bypass piping of the conduit is generally performed by appropriately combining a plurality of straight pipes and connecting pipe members such as elbows and bends, and is extremely troublesome because many members need to be threaded or connected. Kinds of members were required.

[0003] In order to solve such a problem, for example, Japanese Utility Model Laid-Open Publication No. 6-80971, "Piping Structure", proposes a method of using a spiral pipe to bypass a pipe.
According to this prior application, by connecting between the conduits facing each other via an obstacle by a flexible helical tube, the connection becomes two places, the man-hour for connection is greatly reduced, and the elbow is connected. By eliminating the need for a connecting member such as described above, the member cost can be reduced.

[0004] Specifically, the prior application device is formed by connecting a spiral tube inserted between conduits sandwiching an obstacle by a connecting member having a cylindrical shape. The connecting body is formed by forming an iron plate into a C-shape, projecting ear pieces integrally from respective ends, and passing a screw through a screw hole provided in the ear piece to fasten the conduit and the spiral tube. Connecting. The connection body has a packing mounted therein, and seal packings in which a cavity is filled with a sealant is fitted to both end portions. After the conduit and the helical tube are inserted from both ends of the connector, the filled sealant is protruded by tightening the screws to seal the connection with the conduit or the helical tube.

[0005]

In the above-mentioned prior application, mechanical connection with a conduit or a helical tube is made by tightening a connecting body, so that a sufficient locking force in the axial direction is obtained. Cannot be held. The water pipes and the like are buried in the laying trenches, but the buried soil that is put in gradually decreases with time, causing a phenomenon of land subsidence, and a large load is applied. In the prior application, there is a problem that there is a very high risk that the helical tube will fall off from the connector and a water leakage accident will occur, and it cannot be applied to a buried conduit or a conduit device having a large internal pressure.

Further, in the prior application, since the outer peripheral portion of the spiral tube is sealed with a seal packing,
For example, when the present invention is applied to a spiral tube coated with a blade used for a relatively high pressure or the like, there is a problem that water leaks from a gap between the blades, which is not applicable. Further, the prior application device has a problem in application to a high-pressure pipe because a relatively limited region at both ends of the connection body is sealed by seal packing. Furthermore, since the prior application device has a structure in which the conduit and the spiral tube are not directly communicated with each other, when the fluid is used for a fluid conduit such as a high-viscosity fluid or powder, clogging is likely to occur at the connecting portion. There is a problem. As described above, the prior application device is applied only in a limited use range.

In a piping method using a spiral tube,
Due to the various problems described above, a spiral tube 1 in which connecting portions 3a and 3b are formed in advance at both ends of a spiral tube body 2 as shown in FIG. 12 is generally used. The spiral tube 1 has a length corresponding to the interval between the conduits to be connected. The outer peripheral portion of the spiral tube main body 2 has a blade 4 for mechanical protection and regulation of elongation deformation, and a rust omitted in detail. A stop tape or a protective tape is wound. The helical pipe main body 2 is made of a tubing material in which, for example, a helical groove 5 having a smooth waveform is formed continuously in the axial direction using a stainless steel material having excellent mechanical properties and rust resistance. The spiral tube main body 2 has flexibility and elasticity depending on its shape characteristics.

Of course, the helical tube 1 is provided with a helical tube main body 2.
However, a material formed of an appropriate metal material such as copper, titanium, and aluminum alloy, or a synthetic resin material is also used. The helical tube 1 has a helical tube main body 2.
However, a so-called bellows configured as a single mountain spiral type and a so-called spiral tube configured as a continuous mountain spiral type are also used. Further, as the helical tube 1, a so-called annular tube whose helical tube main body 2 is not only an arc shape or a flat shape but also a substantially circular shape is used.

[0009] The connecting portion 3 is configured with specifications suitable for connection according to the type of synthetic resin pipe, cast iron pipe or steel pipe generally used for water pipes. The spiral tube 1 shown in the figure has a specification suitable for connection with a cast iron tube, and details are omitted, but the spiral tube main body 2 and the connection tubes 6a and 6b at the distal end are omitted from the flange plate 7 and details. It is integrated via an exterior material such as a protection ring and a retaining ring. Adjustment ring members 8 a and 8 b for fitting to the inner diameter of the cast iron pipe are fitted to the outer peripheral portion of the connection pipe 6 in the spiral pipe 1.

The blade 4 is wound around the outer periphery of the spiral tube main body 2 over the entire length in the axial direction, and is, for example, a ribbon blade formed by woven a strip-shaped metal plate in a mesh or a metal wire woven in a mesh. Is used. The blade 4 is wound not only in a single layer around the outer peripheral portion of the spiral tube main body 2 but also in multiple layers according to construction conditions and the like. The helical tube 1 has a rust prevention tape or a protection tape wound around the outer periphery of the blade 4 as necessary.

The spiral pipe 1 is somewhat expensive as compared with a straight pipe due to the above-mentioned structure, but it can be used for bypass piping work because a relatively free pipe can be formed very easily. It is extremely effective. However, when the spiral tube 1 is cut to an appropriate length on the way and is directly connected to a conduit, the spiral tube 1 is caused by the characteristic outer shape of the spiral tube body 2 or the blade 4. Various problems such as the above-mentioned prior application arise. Therefore, in the piping method using the spiral tube 1, for example, a measure is taken to adjust the interval on the side of the conduit to be connected according to the length of the spiral tube 1. However, such a measure is difficult depending on the situation at the site. There was a problem.

Accordingly, the present invention follows the superiority of the above-mentioned piping device using a spiral tube, solves the problem of the connection structure with the conduit caused by the structure of the spiral tube, and provides a simple operation for the conduit. The present invention has been proposed for the purpose of providing a spiral tube connecting device capable of reliably performing connection with the spiral tube.

[0013]

A helical pipe connecting apparatus according to the present invention for achieving the above object comprises a connecting pipe main body member and a helical pipe connecting half member. The connecting pipe main body member is formed integrally at one end side to form a connecting part with a conduit or the like, and to form a semi-cylindrical shape at the other end side of the pipe connecting part. A helical tube locking projection is formed on the inner peripheral wall to relatively prevent the helical groove of the helical tube from coming off by being engaged with the helical groove of the helical tube. It comprises a projecting spiral tube connecting half, and a sealing portion formed on the inner peripheral surface and the joining piece of the spiral tube connecting half. The spiral tube connecting half member is formed to have a semi-cylindrical shape, and a sealing portion and a spiral tube locking convex portion for engaging with the spiral groove of the spiral tube to prevent the spiral tube from coming off are formed on the inner peripheral wall. In addition, the joining pieces in the length direction, in which the sealing portions are formed on the outer peripheral surfaces at both ends in the width direction, are integrally protruded.

The helical pipe connecting device according to the present invention having the above-described structure is configured to close the open half of the helical pipe connecting half with respect to the connecting pipe main body member. By combining the half members,
Together, they form a tubular spiral tube connection. In the helical pipe connection device, the connection with the conduit or the like is performed at the conduit connection portion of the connection pipe main body member, and the connection with the helical pipe is performed at the helical pipe connection portion. The spiral pipe connecting device seals the spiral pipe connecting portion of the connecting pipe main body member, the spiral pipe connecting half member, and the outer peripheral portion of the spiral pipe, and performs sealing between the joint pieces by the respective sealing portions. According to the helical pipe connection device, the connection state of the helical pipes connected at the helical pipe connection portion is reliably held by the helical pipe locking projections.

Further, a spiral pipe connecting device according to the present invention that achieves the above-described object includes a spiral pipe connecting half member, a spiral pipe connecting half member, and a sealing member. The spiral pipe connecting half member is formed integrally at one end side to form a connecting portion with a conduit or the like, and has a semi-cylindrical shape at the other end side of the conduit connecting portion. Helical tube locking projections are formed on the inner peripheral wall to engage with the helical groove of the helical tube to prevent the helical tube from coming off, and the longitudinal joining pieces are integrated with the outer peripheral surfaces at both ends in the width direction. And a helical pipe connection half-section protruding therefrom.
The helical pipe connecting half member is formed in a semi-cylindrical shape, and a helical pipe locking convex portion is formed on an inner peripheral wall of the helical pipe to engage with the helical groove of the helical pipe so as to prevent the helical pipe from coming off. The joining pieces in the length direction are integrally provided on the outer peripheral surfaces of both ends of each. The sealing member includes a pair of sealing half members formed in a semi-cylindrical shape. The sealing half member is joined to the spiral pipe connecting half of the connecting pipe main body member and the spiral pipe connecting half member, and is joined to the outer peripheral sealing portion and the joint piece joined to the inner peripheral wall of these members. The joint piece sealing portion to be formed is integrally formed.

According to the helical pipe connecting device of the present invention configured as described above, the open half of the helical pipe connecting half is closed to the connecting pipe main body member so as to close the opened half. When the body members are combined, they form a cylindrical helical tube connection portion in cooperation. In the helical pipe connection device, the connection with the conduit or the like is performed at the conduit connection portion of the connection pipe main body member, and the connection with the helical pipe is performed at the helical pipe connection portion. In the spiral pipe connection device, the outer peripheral sealing portion of the sealing member seals between the inner peripheral wall of the spiral pipe connecting portion and the outer peripheral portion of the spiral pipe, and the joint flange portion of the connecting pipe main body member and the outer peripheral portion of the spiral pipe connect by the joint piece sealing portion. Seal the space between the pipe flange and the joining flange. According to the helical pipe connection device, the connection state of the helical pipes connected at the helical pipe connection portion is reliably held by the helical pipe locking projections.

Further, in the spiral pipe connecting device according to the present invention, the end of the blade peeled off from the spiral pipe main body is attached to the outer peripheral portion of the spiral pipe connecting portion formed by the connecting pipe main body member and the spiral pipe connecting half body. A blade holding member to be held is mounted. Therefore, in the spiral pipe connection device, since the end of the blade is securely held and is prevented from being pulled out of the spiral pipe main body, the protective action of the spiral pipe main body by the blade and the restriction of the extension deformation of the spiral pipe main body are restricted. It will be held securely.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. The connecting device 20 shown in the drawings as an embodiment of the present invention is used, for example, in a case where an obstacle such as an existing sewage manhole is to be bypassed by using the spiral pipe 1 in the plumbing work of the water pipe 10.
And as shown in FIG. 3, the spiral pipe 1 and the water pipe 10 are directly connected. The connecting device 20 enables the spiral pipe 1 cut to an appropriate length on the way depending on the situation at the site to be directly connected to the water pipe 10. In other words, the connecting device 20 does not need to use the spiral tube 1 having a predetermined length in which the connecting portions 3a and 3b are formed at both ends in advance as in the related art. Spiral tube 1 in which tube body 2 is covered with blade 4
Connection is also possible.

Of course, the connecting device 20 not only performs the bypass piping work for the sewage manhole of the water pipe 1 but also the existing gas pipes and various cables buried on the laying route and buried obstacles such as these manholes. The present invention is also applied to a case where detour piping work is performed using the pipe 1. Further, the connection device 20 is applied not only to the bypass piping work for the water pipe 1 but also to the bypass piping work for the middle water pipe and the sewer pipe using the spiral pipe 1. Furthermore, the connecting device 20 is not only a conduit through which a liquid such as clean water or sewage flows, but also a spiral of a conduit through which a fluid such as a gas such as a city gas or a cooling gas or a solid such as a powder, a granular material, or a gel material flows. It is also applied to the bypass piping work using the pipe 1.

The water pipe 10 is formed of, for example, a cast iron pipe, and has a connection flange portion 11 integrally formed at the distal end as shown in FIG. A plurality of mounting holes 12 are formed at equal intervals in the connection flange portion 11, and mounting bolts 13 are inserted into the connection flange portion 11 through a sealing member 14 formed of synthetic rubber or the like, as described later. On the other hand, it is tightened by the nut 15. Although not shown, a suitable washer may be attached to the mounting bolt 13 and the nut 15 for waterproofing or locking.

The water pipe 10 is not limited to a cast iron pipe, but may be any of various materials conventionally used, for example, metal materials such as stainless steel, steel, aluminum alloy or copper, or vinyl chloride resin or polyethylene resin. A tube formed of a synthetic resin material may be used. The water pipe 10 has an appropriate connection structure formed on one end side corresponding to each pipe material. The connection device 20 has a connection structure whose details will be described later according to the specifications of the water pipe 10.

As shown in FIGS. 1 to 5, the connecting device 20 includes a connecting pipe main body member 21 and a spiral pipe connecting half member 22.
And a sealing member 23 including a pair of sealing half members 24 and 25. Connection device 20
Comprises a blade holding ring member 26 composed of a pair of holding ring half members 27 and 28, and a blade guide ring member 29. In the connecting device 20, the connecting pipe main body member 21 and the spiral pipe connecting half body member 22 are
According to the material specification of No. 0, they are integrally formed of a metal material such as stainless steel, steel, aluminum alloy or copper, or a synthetic resin material such as vinyl chloride resin or polyethylene resin.

As shown in detail in FIGS. 6 and 7, the connecting pipe main body member 21 is formed on one end side to form a connecting part with the water pipe 10, and the water pipe connecting part 30 is connected to the water pipe connecting part 30. And a spiral tube connecting half portion 31 integrally formed on the other end of the spiral tube 30 to form a connecting portion with the spiral tube 1. The water pipe connection part 30 has an overall cylindrical shape, and a connection flange part 32 corresponding to the connection flange part 11 of the water pipe 10 is integrally provided. The connection flange 32 has a mounting hole 1
A plurality of mounting holes 33, through which the mounting bolts 13 pass, are formed at regular intervals corresponding to the two.

The spiral tube connecting half portion 31 is a portion which is integrally formed with the rear end of the connecting tube main body member 21 and whose inner diameter is substantially the same as the outer diameter of the spiral tube main body 2.
The rear end side has an entire semi-cylindrical shape by cutting out a semicircular region over the entire region in the axial direction except for the annular portion 34 which is a portion connected to the connection pipe main body member 21. On the outer peripheral surface of the helical pipe connection half portion 31, the joining flange piece 35 (35) is provided along the entire diametrical end edges along the entire axial direction.
a, 35b) are integrally protruded. A plurality of spiral tube locking projections 36 (36a, 36b, 36c) are integrally protruded from the spiral tube connecting half portion 31 near the rear end of the inner peripheral surface. In addition, the spiral tube connection half body 31
, A blade holding projection 37 is integrally provided on the outer peripheral surface of the rear end.

Mounting holes 38 (38a, 38b) are formed in the joining flange piece 35 on the side of the annular portion 34, respectively. Mounting bolts 39 (39a, 39b) are inserted into the mounting holes 38, respectively, as described later. The mounting bolt 39 is provided with a nut 40 (40
a, 40b) is tightened to couple the spiral tube connecting half member 22 to the spiral tube connecting half portion 31. A plurality of mounting holes 38 may be formed in each joint flange piece 35. The blade holding projection 3
7 may be formed in plural on the outer peripheral surface of the spiral tube connection half body portion 31.

The spiral tube locking projection 36 has an arc-shaped cross-section by chamfering the tip, and the pitch thereof is the same as that of the spiral groove 5 formed on the outer peripheral portion of the spiral tube main body 4. It is almost equal to the groove width (pitch) in the state.
The spiral tube locking projection 36 is connected to the connecting device 20 as described later.
When the helical tube 1 is connected to the helical tube 1, the helical tube 1 is relatively engaged with the helical groove 5 of the helical tube main body 4. Spiral tube locking projection 36
Is engaged with a plurality of spiral grooves 5 adjacent to the spiral tube 1 having elastic characteristics, thereby keeping the length of the connection portion of the spiral tube 1 constant.

It is needless to say that a plurality of spiral tube locking projections 36 may be integrally formed on the inner peripheral surface of the spiral tube connecting half 31 over the entire area in the axial direction. Further, since the pitch of the spiral groove 5 changes between the inner peripheral portion and the outer peripheral portion of the curved spiral tube 1, the spiral tube locking convex portion 36 has a thickness slightly smaller than the groove width of the spiral groove 5. Alternatively, the pitch may be reduced.

The spiral tube connecting half member 22 is a member to be combined with the open portion of the spiral tube connecting half portion 31 of the connecting tube main body member 21 and has a semi-cylindrical shape as shown in FIGS. Is formed. Spiral tube connection half member 2
2 communicates with a water pipe connection part 30 to which the tip of the spiral pipe main body 4 is connected in cooperation with the spiral pipe connecting half body part 31 in a state where it is combined with the connecting pipe main body member 21 as described later. Of the spiral tube connecting portion P of the cylindrical portion to be formed.

On the outer peripheral surface of the helical pipe connecting half member 22, joining flange pieces 41 (41a, 41b) are integrally protruded over the entire area in the axial direction along both ends in the diameter direction. . A plurality of spiral tube locking projections 42 (42a, 42b, 42c) having a substantially arc-shaped cross section on the inner peripheral surface located near the rear end are integrally formed on the spiral tube connecting half member 22. It is protruding. The spiral tube connecting half member 22 includes
A blade holding protrusion 43 having a substantially arc-shaped cross section is integrally provided on the outer peripheral surface of the rear end portion.

When the spiral pipe connecting half member 22 is combined with the spiral pipe connecting half 31 of the connecting pipe main body member 21 as described later, the joining flange piece 41 is connected to the spiral pipe connecting half 31. Are respectively butted against the joining flange pieces 35. Attachment holes 44 (44a, 44b) are formed in the respective joint flange pieces 41 in correspondence with the attachment holes 38 of the joint flange pieces 35. Mounting hole 44
, A mounting bolt 39 is penetrated.

Each of the spiral tube locking projections 42 corresponds to a corresponding spiral tube locking portion P when the spiral tube connecting half member 22 is combined with the spiral tube connecting half 31 to form the spiral tube connecting portion P. An annular helical tube engaging convex portion is located on the same circumference as the convex portion 36 and engages with the helical groove 5 of the helical tube 1 on the inner peripheral surface of the cylindrical body to engage and lock the helical groove 5. . Similarly, in a state where the helical tube connecting portion P is formed by the helical tube connecting half member 22 and the helical tube connecting half member 31, the blade holding convex portion 43 is on the same circumference as the corresponding blade holding convex portion 37. Located at the spiral tube connection P
Are formed on the outer peripheral surface of the blade.

The helical pipe connecting half member 22 is held in a combined state with the helical pipe connecting half body portion 31 of the connecting pipe main body member 21 at the front end by a mounting bolt 39 and a nut 40, and at the rear end. The side is held by a blade holding ring member 26 mounted on the outer peripheral portion thereof as described later.

The sealing member 23 is formed of, for example, synthetic rubber or the like, and, as will be described in detail later, a first sealing half member 24 which is assembled to the spiral pipe connecting half 31 of the connecting pipe body member 21; A second sealing half member 25 assembled to the spiral tube connecting half member 22 side. As shown in FIGS. 6 and 7, the first sealing half member 24 includes a semicircular half sealing portion 24 a that covers the outer peripheral surface of the annular portion 34 of the spiral pipe connection half portion 31, and a spiral pipe connection half. A semi-cylindrical spiral tube sealing portion 24b for covering the inner peripheral surface of the body portion 31 and flange sealing portions 24c and 24d for covering the surfaces of the joining flange pieces 35, respectively, are integrally formed. In other words, the first sealing half member 24 has substantially the same shape as the spiral tube connecting half portion 31 and is integrally formed.

As shown in FIG. 6, the first sealing half member 24 has a width such that the spiral tube sealing portion 24b has one end located inward along the inner blade locking projection 36a. Is formed. Although not described in detail, the first sealing half member 24 has a flange sealing portion 2.
At 4c and 24d, mounting holes are formed corresponding to the mounting holes 44 formed in the mounting holes 33 formed in the joint flange pieces 35 of the connection pipe main body member 21, respectively. The first sealing half member 24 is joined to the connection pipe main body member 21 by an adhesive, thereby covering the entire exposed surface of the spiral pipe connection half portion 31 excluding the rear end portion.

As shown in FIGS. 8 to 10, the second sealing half member 25 has a semi-cylindrical spiral tube sealing portion 25a for covering the inner peripheral surface of the spiral tube connecting half member 22.
And the flange sealing portions 25b and 25c that respectively cover the surfaces of the joining flange pieces 41 are integrally formed. In other words, the second sealing half member 25 is
It is formed with substantially the same shape as the inner peripheral surface of the spiral tube connecting half member 22. Second sealing half member 25
As shown in FIG. 8, the spiral pipe sealing portion 25a
It is formed with a width such that one end thereof is located inward along the inner blade locking projection 40a. Although not described in detail, mounting holes are formed in the second sealing half member 25 corresponding to the mounting holes 44 formed in the joint flange portion 41 of the spiral pipe connecting half member 22 respectively. Second
Is joined to the spiral tube connecting half member 22 by an adhesive to cover the entire exposed inner surface except for the rear end portion.

In the connecting device 20, as described above, the sealing member 23 composed of the pair of sealing half members 24 and 25 is constituted by separate members combined with the connecting body member 21 and the spiral tube connecting half member 22, respectively. However, the present invention is not limited to such a configuration. The connecting device 20 may form a sealing portion made of a rubber layer, for example, at a predetermined portion of the connecting body member 21 and the spiral tube connecting half member 22. In the connection device 20, for example, the connection main body member 21 and the spiral tube connection half body member 22 may be integrally formed of a rubber material.

The blade holding ring member 26 is made of, for example, a band-shaped metal material such as stainless steel, steel, aluminum alloy or copper, or a synthetic resin material such as vinyl chloride resin or polyethylene resin. The blade holding ring member 26 has a diameter expansion or diameter reduction characteristic. The blade holding ring member 26 includes a first holding ring half member 27 assembled on the side of the spiral tube connecting half 31 of the connecting tube main body member 21 and a side of the spiral tube connecting half member 22 on the side of the spiral tube connecting member 22 as described in detail below. And a second retaining ring half-member 28 to be assembled. The blade holding ring member 26 includes:
It has an inner diameter that is substantially equal to the outer diameter of the helical pipe connection P formed by the helical pipe connection half 31 and the helical pipe connection half member 22.

The first retaining ring half-member 27 and the second retaining ring half-member 28 are symmetrical members having a semicircular shape. The first retaining ring half member 27 includes:
As shown in FIG. 1, a blade holding recess 45 having an arc-shaped cross section is integrally provided on the inner peripheral surface thereof. The first holding ring half-member 27 is provided with joining flange pieces 46 (46a, 46b) integrally protruding from the outer peripheral surface thereof at both ends in the diameter direction. Mounting holes 47 (47a, 47b) are formed in the joining flange pieces 46, respectively. The blade holding recess 45 is mounted in a state where the blade holding ring member 26 is attached to the flange joint portion P and held by being connected thereto.
It is located at a position corresponding to the blade holding convex portion 37 of the spiral tube connection half portion 31.

The second holding ring half member 28 also has a blade holding recess 48 having an arc-shaped cross section integrally protruding from the inner peripheral surface thereof. The second retaining ring half member 28 also has
At the outer peripheral surface, joining flange pieces 49 are provided at both ends in the diameter direction.
(49a, 49b) are protruded integrally. Each of the joining flange pieces 49 has a mounting hole 50 (50a, 50a).
b) is formed. The blade holding concave portion 48 is located at a position corresponding to the blade holding convex portion 43 of the spiral tube connecting half member 22 in a state where the blade holding ring member 26 is attached to the flange joint portion P and is connected and held.

The first retaining ring half-member 27 and the second retaining ring half-member 28 are joined to the joining flange pieces 46, 49.
To form a ring-shaped blade holding ring member 26. First retaining ring half member 2
7 and the second retaining ring half member 28 are attached to the mounting holes 47 and 50 communicating with each other by the mounting bolts 51 (51a, 51a).
b) is inserted and tightened with nuts 52 (52a, 52b).

The blade holding ring member 26 has
Although the blade holding recesses 45 and 48 are formed on the inner peripheral surface as described above, the blade holding recesses 45 and 48 may be formed by a plurality of recesses located on the same circumference or may be formed by protrusions. in this case,
In the connecting pipe main body member 21 and the helical pipe half body member 22, the above-mentioned blade holding convex parts 37, 43 are constituted by a large number of convex parts or concave parts located on the same circumference.

The blade guide ring member 29 is made of a metal material such as stainless steel, steel, aluminum alloy or copper, or a synthetic resin material such as vinyl chloride resin or polyethylene resin. The blade guide ring member 29 is mounted on the outer peripheral portion of the spiral tube connecting portion P as described later. The blade guide ring member 29 has an inner diameter sufficient for inserting the blade 4 of the spiral tube 1 guided to the outer peripheral portion with respect to the outer diameter of the spiral tube connecting portion P.

The connection device 20 configured as described above
As shown in FIGS. 2 to 5, an appropriate bypass pipe is provided to the spiral pipe connection portion P, and the end of the spiral pipe 1 cut at a predetermined length is connected, and a connection pipe main body member is provided. The end of the water pipe 10 is connected to 21. The connection device 20 is joined to the connection flange 11 of the water pipe 10 with the connection flange 32 of the connection pipe main body member 21 inserted through the sealing member 14. The connection device 20 includes, for example, mounting holes 12 and 33 that are communicated from the connection flange portion 11 side.
The nut 15 is screwed into an end of the mounting bolt 13 protruding toward the connection flange 32 side. The connection device 20 includes the mounting bolt 13
And the nut 15 are tightened to maintain the sealing state by the sealing member 14 so that the water pipe 10
Connection is made.

In the connecting device 20, the spiral pipe 1 is guided and attached to the spiral pipe connecting half 31 of the connecting pipe main body member 21. The spiral tube 1 is, as shown in FIG.
The tip 4a of the blade 4 is previously peeled off so that the tip of the blade 4 is exposed. The spiral tube 1
The blade 4 is peeled off in a state where the blade 4 is folded without cutting the tip 4a, and a blade guide ring member 29 is attached to the outer peripheral portion.

The spiral pipe main body 2 from which the tip 4a of the blade 4 has been peeled from the opened part into the spiral pipe connecting half-body 31 is attached to the connecting device 20 as shown in FIGS. You. As shown in FIG. 5, the connecting device 20 has a plurality of helical tube holding projections 36 formed on the inner peripheral surface of the helical tube connection half body portion 31 and relatively engages with a plurality of adjacent helical grooves 5. . In this state, the connection device 20 covers the spiral tube connection half portion 31 so as to cover the connection tube main body member 21.
The helical tube connecting half member 22 is assembled.
The connecting device 20 includes a plurality of spiral tube holding projections 42 formed on the inner peripheral surface of the spiral tube connecting half member 22 as shown in FIG.
Respectively engage with the adjacent spiral grooves 5.

The connecting device 20 includes a connecting flange portion 35 formed on the spiral pipe connecting half portion 31 of the connecting pipe main body member 21.
And the joining flange portion 41 formed on the spiral tube connecting half member 22 abuts, and the inner peripheral surface of the spiral tube connecting half member 22 abuts on the annular portion 34 of the spiral tube connecting half member 22. . The connection device 20 is sandwiched between the flange sealing portions 24c and 24d of the first sealing member 24 and the flange sealing portions 25b and 25c of the second sealing member 25 between the joining flange portions 35 and 41, respectively. The joint between the connecting pipe main body member 21 and the spiral pipe connecting half body member 22 is sealed. In addition, the connecting device 20 includes a half sealing portion 24 of the first sealing member 24 between the annular portion 34 and the inner peripheral surface.
a and a part of the spiral pipe sealing portion 25a of the second sealing member 25 are sandwiched, whereby the joint portion between the connecting pipe main body member 21 and the spiral pipe connecting half member 22 is sealed.

In the connection device 20, as shown in FIGS. 4 and 5, a spiral tube connecting portion P, which is constituted by a spiral tube connecting half portion 31 and a spiral tube connecting half member 22, is mounted. The helical tube sealing portion 24b of the first sealing member 24 and the helical tube sealing portion 25a of the second sealing member 25 are in close contact with the outer peripheral portion of the tube main body 2 over a predetermined region in the axial direction. As described above, the helical pipe main body 2 is formed with the helical groove 5 continuously along the axial direction to form irregularities on the outer peripheral surface, but the helical pipe sealing portions 24b and 25a are located in predetermined regions. Sealing is ensured by close contact.

In the connecting device 20, the mounting bolt 39 is inserted into the mounting holes 38, 44 which are communicated in the above-mentioned state, and the helical pipe connecting half member 22 is connected to the connecting pipe main body member 21 by tightening it with a nut 40. Fix it. In this connection device 20, the connection pipe main body member 21 and the spiral pipe connection half-body member 22 are connected with sufficient strength in this state, but the blade holding ring member 26 also serves as a fastening member. It will be more reliably joined. The connection device 20 holds the tip 4 a of the blade 4 by the blade holding ring member 26.

In the connecting device 20, the outer peripheral portion of the spiral tube connecting portion P is sandwiched with the blade guide ring member 29 sandwiching the distal end portion 4a of the blade 4 peeled off so as to expose the distal end portion of the spiral tube main body 2. Move to the side.
As shown in FIGS. 4 and 5, the connecting device 20
Is folded back by the blade guide ring member 29, and the folded portion is held by the blade holding ring member 26. Connection device 2
0 means that the blade holding ring member 26 is
At the rear end side, specifically, the blade holding protrusion 37 of the spiral tube connection half-body 31 and the blade holding protrusion 43 of the spiral tube connection half-body member 22 are mounted in correspondence with each other.

In the blade holding ring member 26, the first holding ring half member 27 is applied to the outer peripheral surface of the spiral tube connecting half portion 31, and the second holding ring half member 28 is connected to the spiral tube connecting half. It is applied to the outer peripheral surface of the body member 22. The blade holding ring member 26 includes the joining flange piece 4.
The mounting holes 4 where the holes 6 and 49 are abutted and communicated.
The mounting bolt 51 is inserted through the nuts 7 and 50, and
The first holding ring half-member 27 and the second holding ring half-member 28 are integrated by sandwiching the spiral tube connecting half 31 and the spiral tube connecting half 22 by tightening them.

Therefore, the blade 4 is connected to the blades shown in FIGS.
As shown in the figure, the blade holding projection 37 of the spiral pipe connection half 31, the blade holding projection 43 of the spiral pipe connection half member 22, and the blade holding projections 45 and 48 of the blade holding ring member 26. Between the crank-shaped spaces. The blade 4 has such a sandwiching structure and a blade guide ring member 2 that is turned back at the tip 4a.
The structure in which the blade 9 is locked by the blade holding ring member 26 ensures that the shaft 9 is securely held when the tensile force is applied in the axial direction and is prevented from falling out of the spiral tube main body 2. The blade 4 mechanically protects the spiral pipe main body 2 and reliably holds the action of restricting the elongation deformation.

As described above, the connecting device 20 can be used even when a strong tensile force is applied to the connected spiral tube 1 by the relative engagement of the spiral tube locking projections 36 and 42 with the spiral groove 5. It does not fall off and maintains the connection state reliably. The connection device 20 is connected to the spiral tube main body 2.
The sealing member 23 is brought into close contact with the outer periphery of the sealing member 23 to seal it, and the sealing member 23 seals a joint portion between the spiral tube connecting half 31 and the spiral tube connecting half member 22 of the connecting pipe main body member 21. The spiral pipe 1 and the water pipe 10 are securely connected without causing water leakage or the like.

The connecting device 20 comprises a helical pipe connecting portion P composed of a halved helical pipe connecting half 31 and a helical pipe connecting half member 22 so that the helical pipe 1 and the water pipe 1 can be connected.
This makes it possible to make connection with 0 extremely easily. The connection device 20 further streamlines the bypass piping work streamlined by using the spiral pipe 1. The connection device 20 is capable of reliably processing the blade 4 while maintaining the above-described characteristics, even when the high-pressure pipe requires mechanical strength or the blade-coated helical pipe 1 whose elongation and deformation is restricted. Withdrawal from the tube body 2 is prevented.

The connecting device 20 is connected to the connecting pipe main body member 2.
Although the spiral pipe 1 is connected with the water pipe 10 connected to 1, it goes without saying that the reverse operation may be performed. In the above-described embodiment, the connection device 20 has been described in which one side of the spiral pipe 1 is cut in the middle and the cut end is connected to the water pipe 10. However, the present invention is limited to such a use example. Not something. Needless to say, the connection device 20 is also used when connecting both ends of the spiral pipe 1 to the water pipe 10 respectively.

The present invention is not limited to the connection device 20 shown in the above embodiment. The connection device 60 shown in FIG. 11 as the second embodiment is characterized by the configuration of the spiral tube connection portion P and the sealing member 65 which have the same basic configuration as the connection device 20 described above. That is, in the connection device 60, the helical pipe connecting portion P is constituted by the helical pipe connecting member 61, but the first helical pipe connecting half 62 corresponding to the helical pipe connecting half 31 of the connecting pipe main body member 21. And the second spiral pipe connecting half 63 corresponding to the spiral pipe connecting half member 22 with the hinge 6
4 and are integrally connected. Although not shown, the spiral pipe connecting member 61 has a water pipe connecting portion integrally formed on one side, a spiral engaging convex portion formed on an inner peripheral surface, and a blade holding convex portion on an outer peripheral surface. Are formed.

Further, the connecting device 20 includes the sealing member 6.
A first sealing half 66 assembled to the first spiral tube connecting half 62 side and a second sealing half 67 assembled to the second spiral tube connecting half 63 side; Are integrally connected via a hinge portion 68. Of course, the sealing member 65 is provided with the first sealing half 6.
6 has an inner diameter that is in close contact with the outer peripheral portion of the spiral tube main body 2 of the spiral tube 1 to be connected in a state where the second sealing half 67 abuts.

The spiral tube connecting member 61 is formed of a synthetic resin material, and has a semi-cylindrical first spiral tube connecting half portion 62 on one side thereof via a hinge portion 64 over the entire area in the axial direction. A second spiral tube connecting half portion 63 having a semi-cylindrical shape is formed integrally and continuously. Spiral tube connecting member 61
Is formed by forming the hinge portion 64 with a slightly thinner portion so that flexibility is imparted by its material characteristics. The spiral tube connecting member 61 combines the second spiral tube connecting half 63 with the first spiral tube connecting half 62 by bending the hinge portion 64.

The first and second helical tube connecting half portions 63 and 63 are integrally provided with joining flange pieces 69 and 70 on the other side edge facing the hinge portion 64 so as to face each other. The protrusion is formed. These joining flange pieces 6
Reference numerals 9 and 70 are formed over substantially the entire region in the axial direction, and they are abutted in a state where the second spiral tube connecting half 63 is combined with the first spiral tube connecting half 62. Although not described in detail, one or more mounting holes are formed in the joining flange pieces 69 and 70, respectively. The first spiral pipe connecting half 62 and the second spiral pipe connecting half 63 are provided with mounting bolts 71 in the communicating mounting holes.
Is inserted and tightened with a nut 72 to form a spiral tube connection portion P.

The sealing member 65 is integrally formed of synthetic rubber and is provided on one side of a first sealing half 66 having a semi-cylindrical shape via a thin hinge 68 over the entire area in the axial direction. A second sealing half 67 having a semi-cylindrical shape is integrally provided. Sealing member 65
The first sealing half portion 66 is bonded to the inner peripheral surface of the first spiral tube connecting half portion 62 by an adhesive, and the second sealing spiral portion 66 is bonded to the inner peripheral surface of the second spiral tube connecting half portion 63. The two sealing halves 67 are joined.

In the sealing member 65, joining flange pieces 73 and 74 are provided on the first sealing half 66 and the second sealing half 67 on the other side edge facing the hinge 68, respectively. They are integrally formed to protrude. These joining flange pieces 73 and 74 are formed over almost the entire area in the axial direction, and correspond to the joining flange pieces 69 and 70 of the spiral tube connecting member 61, respectively. Joint flange piece 7
3, 74, the second sealing half 67 is connected to the first sealing half 6 via the second spiral pipe connecting half 63;
6 in the combined state. Although not described in detail, one or a plurality of mounting holes are respectively formed in the joining flange pieces 73 and 74 in correspondence with the mounting holes on the spiral tube connecting member 61 side.

The connecting device 60 configured as described above
In a state where the second spiral tube connecting half 63 opens the first spiral tube connecting half 62, the spiral tube main body 2 of the spiral tube 1 is attached to the first spiral tube connecting half 62. You. The connection device 60 holds the connection state by the helical tube holding projection (not shown) being relatively engaged with the helical groove 5. In addition, the water pipe 1 is connected to the water pipe connection part (not shown) of the connection device 60.

In the connection device 60, the second spiral tube connecting half 63 is combined with the first spiral tube connecting half 62 via the hinge 64 to form the spiral tube connecting portion P. . The connecting device 60 includes a sealing member 6 on the outer peripheral portion of the spiral tube main body 2 connected in the spiral tube connecting portion P.
5 tightly hold it in a sealed state. The connection device 60 connects the joining flange pieces 69 and 70 butted via the joining flange pieces 73 and 74 to the mounting bolts 7.
1 and the nut 72, the first spiral tube connecting half 62 and the second spiral tube connecting half 63
Are integrated. The connecting device 60 has a blade holding ring member and a blade guide ring member (not shown) attached to the outer peripheral portion of the spiral tube connecting portion P to hold the end of the blade 4 of the spiral tube 1 and to hold the first spiral. The pipe connecting half 62 and the second spiral pipe connecting half 63 are firmly connected.

As the sealing member 65 described above, a sealing member similar to the split-type sealing member 23 provided in the connection device 20 of the first embodiment may be used. . The sealing member 65 may of course be used in the connection device 20 of the first embodiment instead of the sealing member 23. Further, the connecting device 60 is replaced with a joint flange piece 69,
70 may be configured to be connected by hook-shaped connecting means integrally formed.

In each of the embodiments, the connection device for the spiral pipe 1 that bypasses the water pipe 10 has been described. However, it is needless to say that the present invention is not limited to such a use example. Regarding the spiral pipe 1 and the water pipe 10, not only a circular shape but also a square or polygonal specification may be used depending on installation conditions. Therefore, the connection device is formed such that the connection pipe main body member, the spiral pipe connection half body member, or the sealing member conforms to the shape of the spiral pipe or the water pipe.

[0065]

As described in detail above, according to the spiral pipe connecting device of the present invention, a cylindrical conduit connecting portion to which a conduit is connected is formed at one end and a semi-cylindrical tube is formed at the other end. A helical pipe connecting part is formed by combining a semi-cylindrical helical pipe connecting half member with a connecting pipe main body member having a helical pipe connecting half formed therein, and a helical pipe connected to the helical pipe connecting part is formed. The helical tube connecting half and the helical tube connecting convex member formed on the inner peripheral surface of the helical tube connecting half member are engaged with the helical groove so as to prevent the helical tube from coming off. Since the joint between the body and the helical pipe connection half member is configured to be sealed by the sealing member, even if the helical pipe is cut at an arbitrary length, it does not fall off to the conduit and has a high degree of sealing. Secure connection It can be carried out to become. In addition, the spiral pipe connection device is connected very easily by connecting the spiral pipe connection half-body and the spiral pipe connection half member that sandwich the spiral pipe, so that the connection of the spiral pipes is performed very easily. Will be Therefore, the helical pipe connection device is applied to plumbing work that has been greatly streamlined by using existing helical pipes to bypass existing obstacles. It is not necessary to use a spiral tube, and it is possible to cope with the situation without being limited by the length of the spiral tube, and further rationalization is achieved.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a use state of the connection device.

FIG. 3 is a partially cutaway side view showing a use state of the connection device.

FIG. 4 is a horizontal sectional view showing a use state of the connection device.

FIG. 5 is a longitudinal sectional view showing a use state of the connection device.

FIG. 6 is a partially cutaway plan view of a connection pipe main body member that constitutes the connection device.

FIG. 7 is a side view of the connection pipe main body member.

FIG. 8 is a partially cutaway plan view of a spiral tube connecting half member constituting the connecting device.

FIG. 9 is a side view of the spiral pipe connecting half member.

FIG. 10 is a front view of the spiral tube connection half member.

FIG. 11 is a longitudinal sectional view of a main part of a connection device shown as another embodiment of the present invention.

FIG. 12 is a side view of a main part of a general spiral pipe used for conventional bypass piping work.

[Explanation of symbols]

1 spiral tube, 2 spiral tube body, 4 blades, 5
Spiral groove, 10 water pipe, 11 connection flange, 14
Sealing member, 20 connecting device, 21 connecting pipe main body member, 22 spiral pipe connecting half member, 23 sealing member, 26 blade holding ring member, 29 blade guide ring member, 30 water pipe connecting section, 31 spiral pipe connecting half section , 32 connection flange portion, 34 annular portion,
35 Joint flange piece, 36 Spiral tube locking projection, 37
Blade holding projection, 39 mounting bolt, 40 nut, 41 joining flange piece, 42 spiral tube locking projection,
43 blade holding projection, 45 blade holding recess, 46
Joint flange piece, 48 blade holding recess, 49 Joint flange piece, 51 mounting bolt, 51 nut, 60
Connecting device, 61 spiral tube connecting member, 62 first spiral tube connecting half, 63 second spiral tube connecting half, 6
4 hinge part, 65 sealing member, 66 first sealing half, 67 second sealing half, 68
Hinge part

Claims (11)

[Claims] 1. A helical pipe connecting device attached to a distal end of a helical pipe and used for connecting the helical pipe to a conduit or the like, wherein the helical pipe connecting device is formed on one end side to form a connection portion with the conduit or the like. A tubular conduit connecting portion to be formed, and a semi-cylindrical shape formed on the other end side of the conduit connecting portion to be integrally formed, the inner peripheral wall of which is engaged with the spiral groove of the spiral tube so as to prevent its removal. Helical pipe connecting half having a helical pipe locking convex portion for forming the helical pipe, and a lengthwise joint piece protruding integrally on the outer peripheral surface at both ends in the width direction, and the helical pipe connecting half A connecting pipe main body member formed of an inner peripheral surface of the connecting pipe and a sealing portion formed on the joining piece portion, and a semi-cylindrical shape formed on the inner peripheral wall so as to be relatively engaged with the sealing portion and the spiral groove of the spiral pipe. Helical tube locking projection Are formed, and longitudinal joining pieces having sealing portions formed on both outer peripheral surfaces in the width direction are integrally protruded from each other, and an open half of the spiral pipe connecting half is opened. And a helical pipe connecting half member that forms a tubular helical pipe connecting part by being combined with the connecting pipe main body member so as to close the connecting pipe main body member. The connection with the conduit or the like is performed and the connection with the spiral tube is performed at the spiral tube connection portion, and the spiral tube connection portion and the spiral tube connection half member of the connection tube main body member by the sealing portions. A spiral pipe connection device, wherein sealing is performed between an outer peripheral portion of the spiral pipe and sealing between the joint pieces. 2. A helical pipe connecting device attached to a distal end of a helical pipe and used when connecting the helical pipe to a conduit or the like, wherein the helical pipe connecting device is formed on one end side and constitutes a connection portion with the conduit or the like. A tubular conduit connecting portion to be formed, and a semi-cylindrical shape formed on the other end side of the conduit connecting portion to be integrally formed, the inner peripheral wall of which is engaged with the spiral groove of the spiral tube so as to prevent its removal. A connecting pipe main body member comprising a spiral pipe connecting half body portion formed with a spiral pipe locking convex portion and a lengthwise joining piece portion respectively protruding integrally on the outer peripheral surfaces at both ends in the width direction, A helical tube engaging convex portion is formed on the inner peripheral wall of the helical tube so as to prevent the helical tube from coming off by being relatively engaged with the helical groove of the helical tube. The joint pieces in the directions A helical pipe connecting half member which forms a tubular helical pipe connecting part by being combined with the connecting pipe main body member so as to close an open half portion of the helical pipe connecting half part, And an outer periphery which is formed to have a semi-cylindrical shape, and which is joined to the inner peripheral wall of each of the helical pipe connecting half members of the connecting pipe main body member and the helical pipe connecting half member members, respectively. A sealing member formed of a pair of sealing half members, wherein the sealing portion and the joining piece sealing portion joined to the joining piece portion are integrally formed, and the conduit is provided at a conduit connecting portion of the connecting pipe main body member. Is connected to the spiral pipe at the spiral pipe connecting portion, and the spiral sealing is performed by the outer peripheral sealing portion of the sealing member. Sealing between the inner peripheral wall of the pipe connecting portion and the outer peripheral portion of the helical pipe and the joining piece sealing portion between the joining piece of the connecting pipe main body member and the joining piece of the helical pipe half member. A spiral pipe connection device characterized by sealing. 3. The helical tube has a helical tube main body covered with a blade, and the connecting tube main body member and the helical tube connecting half are provided on the outer peripheral portion of the helical tube connecting portion. The helical pipe connection device according to claim 1 or 2, further comprising a blade holding member that holds an end of the blade peeled from the pipe main body. 4. The blade holding member has a semi-ring shape having an inner diameter slightly larger than an outer diameter of the helical tube connecting portion, and joining pieces integrally protruding from outer peripheral surfaces at both ends in the width direction. The holding ring member is formed by combining a pair of coupling ring half-members, and the holding ring member sandwiches the end of the blade between the inner peripheral surface and the outer peripheral surface of the spiral tube connecting portion. The spiral pipe connection device according to claim 3, wherein the device is held. 5. The blade holding member is constituted by a pair of connecting ring halves integrally connected at one connecting piece via a flexible connecting portion, and is connected at the other connecting piece. The helical pipe connection device according to claim 4, wherein the helical pipe connection device is mounted on an outer peripheral portion of the helical pipe connection portion by being combined. 6. A blade holding convex portion and a blade holding concave portion sandwiching an end of the blade are formed on an outer peripheral surface of the spiral tube connecting portion and an inner peripheral surface of the holding ring member, respectively. The spiral pipe connection device according to claim 4 or 5, wherein 7. A blade guide ring member is attached to the spiral tube connection portion inside the holding ring member, and the blade is pulled out from between the spiral tube connection portion and the holding ring member. 7. The device according to claim 4, wherein the bent end portion is folded back by the blade guide ring member and is drawn back and held between the spiral tube connection portion and the holding ring member. 1
A helical pipe connection device according to the above item. 8. The connecting pipe main body member has, at one end thereof,
A connection flange portion is integrally formed corresponding to the connection flange portion formed at the end of the conduit, and the connection with the conduit is performed by joining these connection flange portions via a sealing portion or a sealing member. The spiral pipe connection device according to any one of claims 1 to 7, characterized in that: 9. The connecting pipe main body member and the spiral pipe connecting half body member are integrally connected at one connecting piece via a flexible connecting portion, and are connected at the other connecting piece. The helical pipe connection device according to any one of claims 1 to 8, wherein the helical pipe connection part is configured by combining the helical pipe connection parts. 10. The sealing member is integrated by joining a pair of sealing half members to a spiral pipe connecting half of the connecting pipe main body member and an inner peripheral surface of the spiral pipe connecting half member, respectively. The spiral pipe connection device according to any one of claims 2 to 9, wherein: 11. The sealing member, wherein the sealing half member is integrally connected at one connecting piece via a flexible connecting portion, and the other connecting piece is connected to the connecting pipe main body member. 11. Sealing between the joining pieces by being sandwiched between opposing joining pieces of the spiral tube connecting half member.
The spiral pipe connection device according to any one of claims 1 to 6.