JP2007056967A - Engaging joint for flexible pipe, combined flexible pipe using the same, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engaging joint for a flexible pipe having a simple structure with a small number of components, not needing special members and technology for connection, being easily assembled, securing water-tightness, and suitable for mass production. <P>SOLUTION: This engaging joint comprises an inner engaging joint having a circular plate, an inner cylindrical portion vertically disposed orthogonally to a surface of the circular plate, an outer peripheral projecting portion discontinuously projecting from a tip side outer periphery of the inner cylindrical portion, and an anchor portion vertically disposed on the circumference at a back face of the circular plate, and an outer engaging joint having a circular plate, an outer cylindrical portion vertically disposed orthogonally to a surface of the circular plate, an inner peripheral projecting portion discontinuously projecting from a tip side inner periphery of the outer cylindrical portion, and an anchor portion vertically disposed on the circumference at a back face of the circular plate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  By connecting two circular pipes with a flexible joint, the present invention can withstand the load during construction and the earth pressure and water pressure after embedment, and flexibly cope with deformation in the soil such as during an earthquake. The present invention relates to an interlocking joint for flexible pipes that can prevent breakage and cracking of the pipe and ensure airtightness and watertightness, a combined flexible pipe using the same, and a method for manufacturing the same.

Conventionally, fume pipes are generally used as buried pipes for sewers, drains, etc., but the fume pipes cannot cope with various displacements and vibrations such as bending and eccentricity caused by ground fluctuations or earthquake fluctuations. For this reason, even if a part of the tube is broken or does not lead to breakage, the end of the fume tube may be damaged or cracked. And this may cause flooding or leakage. In order to prevent the fume pipe from being damaged, flooded or leaked due to ground fluctuation or earthquake, a flexible joint made of a flexible material such as rubber or synthetic resin is used at the connecting portion of the adjacent fume pipe.
The applicant of the present application (Patent Document 1) states that “two fume pipes whose opening end faces to be connected face each other and an outer side arranged on the opposite opening end faces of one fume pipe”. In the comb-shaped joint, the inner comb-shaped joint disposed on the end face of the other fume tube, the connecting member insertion portion of the outer comb-shaped joint, and the connecting member insertion portion of the inner comb-shaped joint A fume tube connecting structure including a connecting rope inserted therethrough is disclosed.
Japanese Patent Application Laid-Open No. 2005-9694

However, the above conventional techniques have the following problems.
(1) The connection structure of the fume tube of (Patent Document 1) has low rigidity below the deformation set for movement and rotation in all directions, and has high strength and rigidity against further deformation. While it was possible to realize flexible piping that prevents the breakage of the connecting part and to have a reliable structure that can withstand the axial force during propulsion construction, the outer comb inner joint and inner comb joint are A plurality of connecting plates have to be erected on one side of the annular plate at a predetermined interval and perpendicular to the comb teeth, which has a problem that the number of parts is large, man-hours are required for production, and mass productivity is lacking. It was.
(2) Further, the connecting rope must be inserted into the connecting member insertion portion of the outer comb-type joint and the connecting member insertion portion of the inner comb-type joint, and man-hours are required for assembling the connecting portion. , Had a problem of lack of workability.

  The present invention solves the above-mentioned conventional problems, has a simple structure with a small number of parts, does not require special members and techniques for connection, is easy to assemble, and can secure high water tightness, and is excellent in mass productivity. Providing a flexible pipe meshing joint, and having excellent flexibility, can realize a flexible piping that prevents the breakage of the connecting portion, and is excellent in reliability that can withstand axial force during propulsion construction It is an object of the present invention to provide a combined flexible tube and to provide a method for manufacturing a combined flexible tube excellent in assembling workability that can significantly reduce the number of production steps.

In order to solve the above-described problems, the flexible pipe meshing joint of the present invention, the combined flexible pipe using the same, and the manufacturing method thereof have the following configurations.
According to a first aspect of the present invention, there is provided an interlock joint for a flexible tube, comprising: (a) an annular plate, an inner cylinder portion standing perpendicular to the surface of the annular plate, and a distal end side outer periphery of the inner cylinder portion. An inner meshing joint having an outer circumferential protrusion projecting intermittently and an anchor portion standing on the circumference of the back surface of the annular plate; (b) an annular plate; An outer cylinder part standing perpendicularly, an inner peripheral projection part protruding intermittently on the inner periphery of the front end side of the outer cylinder part, and an anchor standing on the circumference on the back surface of the annular plate And an outer mesh joint having a portion.
This configuration has the following effects.
(1) Both the inner mesh joint and the outer mesh joint are integrally formed, have a small number of parts and are excellent in productivity, are easy to handle, and can be easily connected.
(2) The inner mesh joint and the outer mesh joint are intermittently projected on the outer peripheral projection and the outer circumference of the outer cylinder, which are intermittently projected on the outer circumference of the inner cylinder. Since the inner peripheral projection is provided, the connecting operation can be performed simply by rotating the outer peripheral projection and the inner peripheral projection so as to mesh with each other.
(3) The inner meshing joint and the outer meshing joint each have an inner cylinder part and an outer cylinder part that are erected perpendicularly to the surface of the annular plate, so that the tips of the inner cylinder part and the outer cylinder part are connected to each other. Axial force can be transmitted by abutting on the surface of the annular plate, and propulsion can be performed when buried in the soil.
(4) Since the inner cylinder part of the inner meshing joint and the outer cylinder part of the outer meshing joint are arranged concentrically, they can be deformed not only by tension and bending but also by external forces such as torsion. Excellent practicality.
(5) The inner meshing joint and the outer meshing joint each have an outer peripheral protrusion protruding from the outer periphery of the inner cylinder and an inner peripheral protrusion protruding from the inner periphery of the outer cylinder. Therefore, for a tensile external force that is greater than expected, the outer peripheral protrusion and the inner peripheral protrusion can contact each other to prevent deformation.
(6) Since there is an anchor portion standing on the circumference on the back surface of the annular plate of the inner mesh joint and the outer mesh joint, the inner mesh joint and the outer mesh joint are set in the formwork and put into concrete. The anchor portion can be buried in the concrete and fixed firmly by simply putting in.

Here, as materials for the inner mesh joint and the outer mesh joint, metals such as steel, stainless steel, chrome steel, and carbon steel are preferably used. Thereby, it has high mechanical strength and rigidity with respect to the deformation | transformation beyond assumption, and destruction of a connection part can be prevented. In addition, about the site | part which contacts water, especially stainless steel which is excellent in corrosion resistance is preferable.
Moreover, it is preferable that each part of an inner meshing joint and an outer meshing joint is joined to each other by welding. Thereby, since it has high intensity | strength and compression strength and can prevent a deformation | transformation, piping by a propulsion construction method can be performed.
By disposing an external protective collar, a cylindrical shield material, etc., which has flexibility and protects the flexible pipe meshing joint over the outer circumference of each circular pipe where the flexible pipe meshing joint is arranged. Intrusion of groundwater from outside where water pressure is applied can be prevented. When a similar internal protective collar, cylindrical shield material, or the like is disposed on the inner periphery of the circular pipe, the flexible pipe meshing joint can be double protected and the reliability of water stoppage can be improved. As the cylindrical shield material, a material made of rubber such as nitrile rubber, ethylene propylene rubber, fluorine rubber, urethane rubber or the like is preferably used.

The thickness of the annular plate is preferably 5 mm to 18 mm. As the thickness of the annular plate becomes thinner than 5 mm, the strength of the annular plate becomes insufficient and it becomes easy to deform, and as it becomes thicker than 18 mm, there is a tendency that the workability is lacking and the weight increases and the handling becomes difficult. .
Moreover, it is preferable to form the thickness of an inner cylinder part and an outer cylinder part in 3 mm-12 mm. As the thickness of the inner cylinder part and the outer cylinder part becomes thinner than 3 mm, the strength tends to be insufficient and deformation at the time of propulsion tends to occur. As the thickness becomes thicker than 12 mm, the weight increases and the handling becomes difficult. Both are unfavorable.
The outer peripheral protrusion and the inner peripheral protrusion are arranged at the same pitch. At the time of assembly, the inner mesh joint and the outer mesh joint are opposed to each other with a half pitch shift in the circumferential direction so that the outer peripheral projection and the inner peripheral projection are staggered, and the tips of the inner cylinder and the outer cylinder are mutually aligned. After being pushed into contact with the surface of the annular plate, it is rotated by a half pitch so that the outer peripheral protrusion and the inner peripheral protrusion are engaged with each other. The intervals between the outer peripheral projections and the inner peripheral projections arranged intermittently are formed wider than the widths of the opposed inner peripheral projections and outer peripheral projections, and the outer peripheral projections and the inner peripheral projections are mutually connected. Make the structure freely accessible.
Further, when the inner cylinder part or the outer cylinder part is thick, the anchor part may be welded and fixed directly to the inner cylinder plate or the outer cylinder plate. Thereby, an annular board can be abbreviate | omitted and a number of parts can be reduced.

According to a second aspect of the present invention, there is provided a combination-type flexible tube having a circular tube in which an inner meshing joint of the meshing joint for a flexible tube according to the first aspect is disposed on an end surface of the opening, and an opening. The outer meshing joint of the flexible pipe meshing joint according to claim 1 is disposed on an end surface, and the outer circumferential projection of the inner meshing joint and the inner circumferential projection of the outer meshing joint are meshed with each other. Another circular pipe connected to one circular pipe, an internal protective collar formed in a cylindrical shape and disposed on the inner peripheral side of the meshing joint for flexible pipes, and formed in a cylindrical shape in the circumferential direction and / or An outer protective collar having discontinuities formed in the axial direction and disposed on the outer peripheral side of the flexible pipe meshing joint; and an inner circumference and the inner of the inner cylinder part of the inner meshing joint An inner water blocking material filled between the outer periphery of the protective collar, the outer periphery of the outer tube portion of the outer mesh joint, and the outer And it has a configuration including an external water stopping material filled between the inner periphery of the protective collar.
This configuration has the following effects.
(1) Two circular pipes are connected by an inner meshing joint and an outer meshing joint disposed on the respective end faces of the opening, and internal protective collars are provided on the inner and outer peripheral sides of the flexible pipe meshing joint. In addition, an external protective collar is disposed, and an internal water-stopping material and an external water-stopping material are filled between the flexible pipe meshing joint, so that it has flexibility and can secure airtightness and watertightness. It can be set as a connection structure.
(2) Since the number of parts is small and can be connected simply by engaging the outer peripheral protrusion of the inner mesh joint and the inner peripheral protrusion of the outer mesh joint, positioning and connection are easy and workability is excellent. In addition to pulling, bending, and twisting around the central axis of the circular tube, it has flexibility to flexibly and can be manufactured with less man-hours without the need for special techniques and materials for connection. Can be mass-produced.
(3) With respect to an external force that is greater than expected, deformation can be prevented by the rigidity of the inner mesh joint and the outer mesh joint, and earth and sand can be prevented from entering the circular pipe after being buried in the soil.
(4) Since the inner mesh joint and the outer mesh joint have high strength and axial strength, they can be used for piping by the propulsion method.
(5) Since the inner mesh joint and the outer mesh joint can be manufactured at a factory separately from the circular pipe, quality control is easy and dimensional accuracy can be obtained.
(6) Since the external water-stopping material is covered with the external protective collar, it is possible to prevent the external water-stopping material from being damaged during the construction of the combined flexible tube.
(7) Since the external protective collar formed in a cylindrical shape has a cut portion formed intermittently in the circumferential direction and / or the axial direction, it can be deformed against external forces such as tension, bending, and twisting. Further, it is possible to protect the external water stop material and the flexible pipe mesh joint without impairing the flexibility and water tightness of the flexible pipe mesh joint (connecting portion).
(8) Since it has an external protective collar and an external water-stop material filled inside the external protective collar, it protects the mesh joint for flexible pipes and prevents dirt and sand from entering the inside of the circular pipe, while also ensuring water tightness. Can be secured.
(9) To ensure watertightness by water-stopping the flexible pipe meshing joint by simply filling an outer watertight material between the outer circumference of the outer cylinder portion of the outer meshing joint and the inner circumference of the external protective collar. It is excellent in productivity.
(10) Double the circular pipe together with the external water-stopping material by filling the internal water-stopping material between the inner circumference of the inner cylinder part of the inner meshing joint and the outer circumference of the internal protective collar. Therefore, even if any one of the water-stopping materials breaks, water tightness can be secured.

Here, it is preferable that the compression and tensile strength of the inner mesh joint and the outer mesh joint exceed the compression and tensile strength of the circular pipe body. Thereby, in the case of an earthquake etc., the meshing joint (connecting portion) for the flexible pipe is not broken before the circular pipe, and the pipe can be prevented from being broken at once.
As materials for the inner protective collar and the outer protective collar, metals such as steel, stainless steel, chrome steel, and carbon steel are preferably used.
The plate thickness of the inner protective collar and the outer protective collar is preferably 2 mm to 12 mm. As the plate thickness becomes thinner than 2 mm, the rigidity and wear resistance tend to decrease and the internal water-stopping material and the external water-stopping material tend to be damaged. As the plate thickness becomes thicker than 12 mm, the weight increases. There is a tendency that the workability and workability are lacking and the flexibility of the connecting portion tends to be lowered, both of which are not preferable.

Laser processing is preferably used for forming the cut portion of the external protective collar. The width, length, and pitch of the cut portion are determined in consideration of the outer diameter of the circular tube, the thickness of the external protective collar, the allowable bending deformation amount, and the like. In addition, the shape of the cut portion can be formed in a straight line, a square shape, a square shape, or a combination thereof, and these can be arranged at an angle with a predetermined angle. In addition, by forming an intermittent cut in the circumferential direction at a displacement location such as the center in the longitudinal direction of the external protective collar, it can be deformed in response to an external force of tension or bending, and intermittent in the axial direction. By forming the cut portion at an arbitrary position, it can be deformed corresponding to the external force of torsion.
When anchor bars are disposed along the outer periphery of the inner protective collar or the inner periphery of the outer protective collar, the inner protective collar or the outer protective collar and the circular tube can be securely fixed. Further, the anchor portions arranged on the annular plates of the inner mesh joint and the outer mesh joint may be bent to the outer peripheral side and welded to the inner peripheral surface of the external protective collar. As a result, the external protective collar and the flexible pipe mesh joint can be firmly fixed, and handling is easy and workability can be improved. The internal protective collar may be provided with a fixing embedded portion formed in a substantially trapezoidal shape or the like on the circumference of the end portion. By embedding the fixing embedded portion in the circular pipe, the inner protective collar and the circular pipe can be firmly fixed, and the durability can be improved.

As the internal water-stopping material and the external water-stopping material, liquid rubbers such as silicone rubber and polybutene that have fluidity before curing and have high adhesion to metal are preferably used. Thereby, filling is easy and productivity is excellent, and the flexibility and water tightness of the connecting portion can be ensured. In particular, those having high elasticity after curing are preferable because of their excellent reliability and durability.
By setting the internal joint collar and the external protective collar in the mold frame and putting the concrete into the mold, the inner joint joint and The anchor portion disposed on the annular plate of the outer meshing joint can be embedded in the circular tube to form a combined flexible tube, which is excellent in productivity.
By fixing both ends of the external protective collar to the two circular tubes, when an external force is applied, the cut portion opens and can cope with various deformations. The inner protective collar can move with the outer meshing joint when an external force is applied by fixing one end to another circular pipe provided with the outer meshing joint, and can cope with various deformations. .

Invention of Claim 3 of this invention is a combination type flexible tube of Claim 2, Comprising: The said internal water-stop material and the said external water-stop material have the structure which is liquid rubber.
With this configuration, in addition to the operation of the second aspect, the following operation is provided.
(1) Since the internal water-stopping material and the external water-stopping material are liquid rubbers, the filling performance is excellent, and the inside and the outside of the joint for flexible pipes can be water-stopped to ensure watertightness. In addition, it is possible to cope with deformation such as tension, compression, and bending by the elasticity and stretchability of the external water-stopping material, and the flexibility of the connecting portion can be maintained.
(2) Since the internal water-stopping material and the external water-stopping material are liquid rubbers, filling can be performed easily using a syringe or the like.

Here, as the liquid rubber, a condensation reaction type such as a dealcohol type RTV (room temperature curing type) which reacts with moisture in the air at room temperature and cures into a rubber shape is suitably used. Silicone RTV rubber that adheres to most materials at the same time as curing is preferable because of its excellent reliability of water stoppage. As the silicone RTV rubber, one-pack type or two-pack type can be used.
It should be noted that at least the inner peripheral surface of the inner cylinder portion of the inner mesh joint that contacts the inner water stop material and the outer water seal material, the outer peripheral surface of the inner protective collar, the outer peripheral surface of the outer cylinder portion of the outer mesh joint, and the outer protective collar Primer treatment is applied to the inner peripheral surface. Further, the outer peripheral surface where the annular plate of the inner meshing joint contacts the inner peripheral surface of the inner protective collar on the inner peripheral side of the annular plate and the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate. When it has a contact part, it is preferable to also perform a primer process also on the surface of the cyclic | annular board which contact | connects an internal water stop material and an external water stop material. Thereby, the adhesiveness of an internal water-stop material and an external water-stop material and each part which contact | connects it can be improved, and it is excellent in watertightness.

When the internal water-stopping material and the external water-stopping material have sufficient elasticity, the internal water-stopping material and the external water-stopping material follow the movement of the flexible pipe mesh joint and the internal protective collar and the deformation of the external protective collar caused by external force. Since the water material expands and contracts, even if it adheres by applying primer treatment to the entire surface that contacts the internal water stop material and the external water stop material, the flexibility does not decrease, and the water adhesion is improved with excellent adhesion reliability. can do.
Moreover, it is preferable to form the cut part of the outer protective collar at a position away from the tip (inner peripheral projection part side) within the range of the outer cylinder part of the outer meshing joint. As a result, even if the cut part of the external protective collar opens during deformation due to external force, it is possible to reliably stop the water with the external water-stopping material adhered to the outer cylinder part of the outer meshing joint. , Durability can be improved.
In addition, it is preferable to perform cleaning and a degreasing process before a primer process. Thereby, adhesiveness can be improved more. The primer treatment, cleaning, and degreasing treatment may be performed either before or after assembly of the flexible pipe meshing joint.

When the inner protective collar is provided with slits intermittently formed in the circumferential direction and / or the axial direction, both ends of the inner protective collar are fixed to the annular plate or the circular pipe of the inner mesh joint and the outer mesh joint. Thus, when an external force is applied, the cut portion opens like the external protective collar, and can cope with various deformations such as tension, bending, and twisting. Thereby, it is possible to protect the internal water blocking material and the flexible pipe mesh joint without impairing the flexibility and water tightness of the connecting portion.
The cut portion of the internal protective collar can be formed in the same manner as the cut portion of the external protective collar.

The invention according to claim 4 of the present invention is the combined flexible tube according to claim 2 or 3, wherein the cut portion formed intermittently in the circumferential direction of the external protection collar is the external protection. A plurality of rows are arranged in the longitudinal direction of the central axis of the collar, and the adjacent cut portions are arranged in a staggered pattern shifted in the circumferential direction.
With this configuration, in addition to the operation of the second or third aspect, the following operation is provided.
(1) A plurality of rows of cut portions intermittently formed in the circumferential direction of the external protective collar are arranged at a predetermined pitch in the longitudinal direction of the central axis of the external protective collar, and adjacent cut portions are arranged at predetermined intervals in the circumferential direction. Since they are arranged in a staggered pattern, the pulling side of the external protective collar opens in a mesh shape when deformed by an external force, ensuring flexibility and protecting the external water-stopping material.

Here, the length and pitch of the cut portion of the external protective collar are selected according to the outer diameter of the circular tube so that the connection portion is not cut within the range of deformation of the connecting portion. Thereby, even after a deformation | transformation, an external water stop material can be protected reliably and watertightness can be ensured.
By forming the cut part of the external protective collar so that the connecting part is deformed with an external force of 30% to 60% of the bending strength of the circular pipe, it is possible to prevent the circular pipe from being broken and to leak sewage flowing inside. Without reliability.
When the internal protective collar has a cut portion, it may be arranged in a staggered manner as with the external protective collar. When the inner protective collar is deformed by an external force, the pulling side of the inner protective collar opens in a mesh shape, so that the flexibility of the flexible pipe meshing joint can be ensured, and the inner waterstop material can be protected.

A fifth aspect of the present invention is the combined flexible tube according to any one of the second to fourth aspects, wherein the internal tube extends from an end face of the opening of the other circular tube. It has the structure provided with the reinforced concrete part arrange | positioned by the inner peripheral side of the protective collar.
With this configuration, in addition to the operation of any one of claims 2 to 4, the following operation is provided.
(1) By having a reinforced concrete portion that extends from the end face of the opening of another circular tube and is disposed on the inner peripheral side of the inner protective collar, the inner peripheral side of the mesh joint for flexible tubes is the reinforced concrete portion. As well as protecting it, it is possible to transmit the axial force by bringing the tip of the reinforced concrete part into contact with the annular plate of the inner meshing joint, reducing the load applied to the meshing joint for flexible pipes during propulsion. Therefore, propulsion can be carried out even with a circular pipe having a large pipe diameter, which is excellent in reliability.

Here, when the anchor bars are arranged along the inner periphery of the inner protective collar, the inner protective collar and the reinforced concrete portion can be reliably fixed.
The tip of the reinforced concrete part when the concrete is put into the mold with the mesh joint for flexible pipe integrated with the internal water-stopping material and the external water-stopping material, the internal protective collar and the external protective collar. It is preferable to apply a release agent to the surface of the annular plate of the inner mesh joint where the abuts. Thereby, it can prevent that the front-end | tip of a reinforced concrete part sticks to the annular plate of an inner meshing joint at the time of shaping | molding, and can ensure the flexibility of a combination type flexible tube.

The invention according to claim 6 of the present invention is the combination-type flexible tube according to claim 5, wherein the flexible tube is extended at an end portion of the inner protective collar and covered at an end portion of the reinforced concrete portion. It has the structure provided with the edge part protection plate.
With this configuration, in addition to the operation of the fifth aspect, the following operation is provided.
(1) Because it has an end protection plate that extends to the end of the internal protection collar, it can protect the end of the reinforced concrete part that is placed on the inner peripheral side of the internal protection collar. Further, it is possible to prevent the end portion of the reinforced concrete portion from being damaged due to an external force or the like during deformation, and to improve reliability.
(2) Engagement with flexible pipe meshing joint, internal protective collar and external protective collar integrated through an internal waterstop and external waterstop, when the concrete is put into the mold Since the inner protection collar (inner circumference) side surface of the annular joint plate is covered with the end protection plate, it is possible to reliably prevent the tip of the reinforced concrete part from sticking to the annular plate of the inner mesh joint during molding. The productivity is excellent because there is no need to apply a release agent.
Here, the end protection plate is formed in an annular shape on the inner peripheral side of the inner protection collar so as to be orthogonal to the cylindrical portion. The width in the diameter direction of the end protection plate can be appropriately selected according to the thickness of the circular tube to be formed.

According to a seventh aspect of the present invention, there is provided a method for manufacturing a combined flexible tube, wherein the outer peripheral protrusion of the inner meshing joint of the flexible tube meshing joint according to the first aspect and the flexible tube according to the first aspect. 7. A joint coupling step for meshing and coupling the inner peripheral projections of the outer mesh joint of the mesh joint to each other, and an inner circumference side of the inner mesh joint and an outer circumference side of the outer mesh joint. The joint protection process which each arrange | positions the internal protection collar and external protection collar of any one of these, Between the said inner cylinder part and the said internal protection collar of the said inner meshing joint, The said Claim 2 or 3 The external water-stopping material according to claim 2 or 3 is filled between the internal water-stopping step of filling the internal water-stopping material according to claim 3 and the outer cylinder portion of the outer mesh joint and the external protective collar. Before integrated with the external water stop process and the internal water stop material and the external water stop material It has a concreting step of introducing concrete and meshing flexible tube joint the inner protective collar and the outer protective collar is set in a mold frame, a structure having a.
This configuration has the following effects.
(1) In the joint connecting step, the connecting operation can be performed simply by engaging the outer peripheral protrusion of the inner mesh joint and the inner peripheral protrusion of the outer mesh joint, and the assembly workability is excellent.
(2) By connecting the inner protective collar and the outer protective collar on the inner peripheral side of the inner meshing joint and on the outer peripheral side of the outer meshing joint, the flexible pipe meshing joint can be protected by the connecting portion protection step. The integrated joint for flexible tube, the inner protective collar and the outer protective collar are easy to handle and have excellent workability.
(3) By simply filling the inner water-stopping material between the inner cylinder portion of the inner mesh joint and the inner protective collar by the inner water-stopping step, without reducing the flexibility of the combined flexible tube, The inner peripheral side of the flexible pipe meshing joint can be surely stopped.
(4) By only filling an external water stop material between the outer tube portion of the outer mesh joint and the external protective collar by the external water stop process, without reducing the flexibility of the combined flexible tube, The outer peripheral side of the flexible pipe meshing joint can be reliably stopped.
(5) In the concrete placing process, the concrete is thrown into the internal joint collar and the external protective collar which are integrated with the internal water-stopping material and the external water-stopping material and set in the mold. Thus, the anchor portions of the inner mesh joint and the outer mesh joint can be embedded and fixed in the concrete, and a combined flexible tube excellent in flexibility and water stoppage can be obtained.

Here, the assembly of the inner mesh joint and the outer mesh joint is as described in the first aspect.
It is preferable that the outer protective collar and the inner meshing joint are fixed by a stopper or the like formed in a substantially L shape. For example, a fastener may be welded on the circumference of the inner peripheral surface of the outer protective collar in advance and fixed to the back surface of the annular plate of the inner mesh joint by screwing or the like. Thereby, a connection part and an external protective collar can be handled integrally, and workability | operativity can be improved.
When the inner protective collar has a cut portion like the outer protective collar, it is necessary to fix both ends of the inner protective collar to the annular plate or the circular pipe of the inner mesh joint and the outer mesh joint as described above. . If the internal protective collar does not have a cut, the internal protective collar must be able to move with the outer mesh joint when an external force is applied during use. It is necessary to temporarily fix the end portion on the inner meshing joint side to the annular plate of the inner meshing joint, and remove the fixing at the time of use.

  When performing the internal water stop process and the external water stop process, the outer peripheral surface of the inner protective collar and the inner periphery of the outer mesh joint annular plate, and the outer peripheral collar inner surface and the outer mesh joint annular plate. It is preferable to dispose a gap adjusting piece formed in a wedge shape or the like at an important point on the circumference. This forms between the outer peripheral surface of the inner protective collar and the inner peripheral surface of the inner cylindrical portion of the inner mesh joint, and between the inner peripheral surface of the outer protective collar and the outer peripheral surface of the outer cylindrical portion of the outer mesh joint. The interval between the inner circumferential side space portion and the outer circumferential side space portion can be made substantially constant over the entire circumference, and the internal water-stopping material and the external water-stopping material can be filled smoothly. In addition, the finished thickness of the internal water-stopping material and the external water-stopping material can be made uniform, and variations in the water-stopping can be reduced to improve durability.

As described above, according to the meshing joint for flexible tubes of the present invention, the combined flexible tube using the same, and the manufacturing method thereof, the following advantageous effects can be obtained.
According to invention of Claim 1, it has the following effects.
(1) Since the inner mesh joint and the outer mesh joint are integrally formed and the number of parts is small, handling is simple, and the flexible pipe mesh joint is excellent in workability and can be easily connected. Can be provided.
(2) By simply rotating at least one of the inner mesh joint and the outer mesh joint, the outer and inner projections intermittently projecting can be meshed with each other. It is possible to provide a comb-shaped joint for a flexible tube excellent in workability and workability.
(3) The axial force can be transmitted by bringing the tip of each of the inner cylinder part of the inner meshing joint and the outer cylinder part of the outer meshing joint into contact with each other's annular plate surface, It is possible to provide a comb-shaped joint for a flexible tube that is excellent in workability and can be propelled.
(4) Since the inner cylinder part of the inner meshing joint and the outer cylinder part of the outer meshing joint are arranged concentrically, they can be deformed not only by tension and bending but also by external forces such as torsion. It is possible to provide a comb-shaped joint for flexible pipes that is excellent in practicality.
(5) A flexible comb-teeth for a flexible tube that can prevent deformation by preventing the outer peripheral protrusion of the inner mesh joint and the inner peripheral protrusion of the outer mesh joint from contacting each other against a tensile external force greater than expected. A mold joint can be provided.
(6) Since there is an anchor portion standing on the circumference on the back surface of the annular plate of the inner mesh joint and the outer mesh joint, the inner mesh joint and the outer mesh joint are set in the formwork and put into concrete. It is possible to provide a comb-shaped joint for flexible pipes that is excellent in productivity and can be firmly fixed by burying the anchor portion in the concrete simply by putting in.

According to invention of Claim 2, it has the following effects.
(1) Two circular pipes are connected by an inner meshing joint and an outer meshing joint disposed on the respective end faces of the opening, and internal protective collars are provided on the inner and outer peripheral sides of the flexible pipe meshing joint. In addition, an external protective collar is disposed, and an internal water-stopping material and an external water-stopping material are filled between the flexible pipe meshing joint, so that it has flexibility and can secure airtightness and watertightness. A combined flexible tube having excellent reliability can be provided.
(2) Easy alignment and connection of inner mesh joint and outer mesh joint, excellent workability, and flexible to torsion around the central axis of the tube in addition to compression, tension and bending Therefore, it is possible to provide a combination type flexible tube excellent in mass productivity that can be manufactured with a small number of man-hours without requiring a special technique or member for connection.
(3) Reliability that can prevent deformation due to the rigidity of the inner mesh joint and the outer mesh joint, and prevent intrusion of earth and sand etc. into the circular pipe after embedding in the soil for an external force greater than expected. It is possible to provide an excellent combination type flexible tube.
(4) Since the inner mesh joint and the outer mesh joint having high strength and axial strength are provided, it is possible to provide a combination-type flexible tube excellent in workability that can be used for piping by a propulsion method. .
(5) By providing an external protective collar having cuts intermittently formed in the circumferential direction and / or the axial direction, it can be deformed by external forces such as tension, bending, and twisting, and is flexible and watertight. Thus, it is possible to provide a highly reliable combined flexible tube that can protect the external water-stopping material and the flexible tube mesh joint without impairing.
(6) The flexible pipe meshing joint can be protected with an external protective collar and an external water-stopping material filled inside, preventing intrusion of earth and sand into the circular pipe and ensuring water tightness. Therefore, it is possible to provide a combined flexible tube excellent in reliability.
(7) No complicated process such as special fixing means or adhesion is required, and it is flexible just by filling an external water stop material between the outer periphery of the outer cylinder portion of the outer mesh joint and the inner periphery of the outer protective collar. It is possible to provide a combination-type flexible pipe excellent in mass productivity that can stop the meshing joint for pipes and ensure watertightness.
(8) With the internal water-stopping material and the external water-stopping material, it is possible to provide a combined flexible tube excellent in water tightness that can be double protected from water immersion.

According to invention of Claim 3, in addition to the effect of Claim 2, it has the following effects.
(1) Since the internal water-stopping material and the external water-stopping material are liquid rubbers, the filling performance is excellent, and the inside and the outside of the joint for flexible pipes can be water-stopped to ensure watertightness. In addition, the elasticity and stretchability of the external water-stopping material can cope with deformation such as tension, compression, bending, etc., and it can maintain the flexibility of the mesh joint for flexible pipes. A combination flexible tube can be provided.
(2) Since the internal water-stopping material and the external water-stopping material are liquid rubbers, it is possible to provide a combined flexible tube excellent in workability that can be easily filled using a syringe or the like.

According to invention of Claim 4, in addition to the effect of Claim 2 or Claim 3, it has the following effects.
(1) Since the outer protective collar has cut portions arranged in a staggered manner, the cut portion on the pull side of the outer protective collar can be opened in a mesh shape when deformed by an external force, and the flexibility of the connecting portion can be secured. It is possible to provide a combined flexible tube excellent in reliability that can protect the water stop material.

According to invention of Claim 5, in addition to the effect of any one of Claims 2 thru | or 4, it has the following effects.
(1) The reinforced concrete portion extending from the end face of the opening of another circular tube to the inner peripheral side of the inner protective collar can protect the inner peripheral side of the flexible pipe mesh joint, and the reinforced concrete portion. Since the axial force can be transmitted by abutting the tip of the inner meshing joint with the annular plate of the inner meshing joint, the load applied to the meshing joint for flexible pipes during propulsion can be reduced, and a circle with a large pipe diameter can be reduced. It is possible to provide a combination-type flexible tube excellent in reliability and workability that can be propelled even with a tube.

According to invention of Claim 6, in addition to the effect of Claim 5, it has the following effects.
(1) The end part of the reinforced concrete part can be protected by the end part protection plate extended to the end part of the internal protection collar, and the end part of the reinforced concrete part is cut by external force during propulsion work or deformation. Thus, it is possible to provide a combined flexible tube excellent in reliability that can be prevented from being damaged by being damaged.
(2) Engagement with flexible pipe meshing joint, internal protective collar and external protective collar integrated through an internal waterstop and external waterstop, when the concrete is put into the mold By covering the inner protective collar (inner circumference) side surface of the annular plate of the large joint with the end protective plate, it is possible to prevent the tip of the reinforced concrete portion from sticking to the annular plate of the inner mesh joint during molding. It is possible to provide a combined flexible tube that does not require a step of applying an agent and is excellent in productivity.

According to invention of Claim 7, it has the following effects.
(1) In the joint connecting step, the outer peripheral protrusion of the inner mesh joint and the inner peripheral protrusion of the outer mesh joint are simply meshed with each other, and the connection work can be easily performed in a short time without using a tool or the like. The manufacturing method of the combination type flexible tube excellent in the assembly workability which can be provided can be provided.
(2) In the connecting portion protection step, the external protective collar and the internal protective collar are respectively disposed on the outer peripheral side of the outer mesh joint and the inner peripheral side of the inner mesh joint, thereby protecting the flexible pipe mesh joint. At the same time, it is possible to provide a method for manufacturing a combined flexible tube excellent in workability capable of handling the flexible tube mesh joint, the inner protective collar, and the outer protective collar integrally.
(3) In the internal water stop process, the inner peripheral side of the flexible pipe mesh joint is reliably stopped by simply filling the internal water stop material between the inner cylindrical portion of the inner mesh joint and the internal protective collar. The manufacturing method of the combination type flexible tube excellent in the workability and reliability which can be provided can be provided.
(4) In the external water stop process, the outer peripheral side of the flexible pipe mesh joint is surely stopped by simply filling an external water seal material between the outer cylinder portion of the outer mesh joint and the external protective collar. Thus, it is possible to provide a method for manufacturing a combined flexible tube excellent in workability and reliability.
(5) In the concrete placing process, the flexible pipe mesh joint integrated with the internal water-stopping material and the external water-stopping material, the internal protective collar and the external protective collar are set in the formwork, and the concrete is simply poured. Thus, it is possible to provide a method for manufacturing a combined flexible tube excellent in mass productivity, in which the anchor portions of the inner mesh joint and the outer mesh joint can be embedded and fixed in concrete.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a perspective view showing an interlocking joint for a flexible tube, an inner protective collar, and an outer protective collar in the first embodiment.
In FIG. 1, reference numeral 1 denotes a flexible pipe meshing joint according to the first embodiment, 10 denotes an inner meshing joint of a flexible pipe meshing joint 1 made of metal such as stainless steel, and 11 denotes an annular plate of the inner meshing joint 10. , 11a is an anchor portion of the inner mesh joint 10 fixed on the back surface of the annular plate 11, 12 is an inner cylinder portion of the inner mesh joint 10 erected perpendicularly to the surface of the annular plate 11, and 13 is an inner cylinder. The outer peripheral projection of the inner mesh joint 10 projecting intermittently on the outer periphery of the tip end of the section 12, 20 is the outer mesh joint of the flexible pipe mesh joint 1 made of metal such as stainless steel, and 21 is the outer mesh. An annular plate of the joint 20, 21 a is an anchor portion of the outer meshing joint 20 fixed on the back surface of the annular plate 21, and 22 is an outer cylinder of the outer meshing joint 20 erected perpendicularly to the surface of the annular plate 21. , 23 is an outer meshing projecting intermittently on the inner periphery of the outer end of the outer cylinder 22 An inner peripheral projection 25 of the hand 20, an inner protective collar 25 formed in a cylindrical shape and disposed on the inner peripheral side of the inner mesh joint 10 and the outer mesh joint 20, and 26 an end circumference of the inner protective collar 25 An embedding portion for fixing formed in a substantially trapezoidal shape, 30 is an external protective collar 30 formed in a cylindrical shape and disposed on the outer peripheral side of the inner mesh joint 10 and the outer mesh joint 20, and 30a is an external protective collar 30. The cut portions 30b are intermittently formed in the circumferential direction and arranged in a staggered manner, 30b is a connection portion formed between the cut portions 30a of the external protective collar 30, and 31 is the inner periphery of the external protective collar 30. A substantially L-shaped stopper 32, which is arranged on the circumference of the surface and is fixed on the back surface of the annular plate 11 of the inner mesh joint 10, is arranged along the inner circumference of the external protective collar 30. Anchor muscle.

The combined flexible pipe using the flexible pipe mesh joint of Embodiment 1 formed as described above will be described below with reference to the drawings.
FIG. 2 is a cross-sectional view of the main part showing the combined flexible tube disposed at the end of the tube that contacts the flexible tube meshing joint in the first embodiment, and FIG. 3 is a diagram of the flexible tube meshing in the first embodiment. FIG. 4 (a) is a cross-sectional view of a principal part showing a bending deformation state of a combined flexible tube using a joint, and FIG. 4 (a) shows the combined flexible tube using a flexible tube engaging joint in the first embodiment. FIG. 4B is a side view of an essential part showing a bending deformation state of the combined flexible pipe using the flexible pipe engaging joint in the first embodiment, and FIG. These are the A section enlarged views in FIG.4 (b).
2 and 3, reference numeral 35 denotes a combination-type flexible pipe using the flexible pipe engaging joint 1 according to the first embodiment. Reference numeral 36 denotes an outer peripheral surface in which the anchor part 11a of the inner engaging joint 10 is embedded in the opening end face 36a. A circular tube 37 in which the anchor bars 32 of the outer protective collar 30 are embedded is embedded in the opening end surface 37a of the anchor portion 21a of the outer mesh joint 20 and the fixing embedded portion 26 of the inner protective collar 25 on the outer periphery. The other circular pipe in which the anchor bars 32 of the outer protective collar 30 are embedded, 38 is a silicone rubber filled between the inner periphery of the inner cylindrical portion 12 of the inner meshing joint 10 and the outer periphery of the inner protective collar 25. An internal water-stopping material, an external water-stopping material such as silicone rubber filled between the outer periphery of the outer cylindrical portion 22 of the 39 outer mesh joint 20 and the inner periphery of the outer protective collar 30.

By making the inner mesh joint 10 and the outer mesh joint 20 made of metal, it has high mechanical strength and rigidity against deformation more than expected and can prevent breakage of the connecting portion. In particular, it is preferable to use stainless steel having excellent corrosion resistance for a portion that comes into contact with water.
Further, the inner mesh joint 10 and the outer mesh joint 20 were formed so that the compression and tensile strength of the inner mesh joint 10 and the outer mesh joint 20 exceeded the compression and tensile strength of the circular pipes 36 and 37. This prevents the flexible pipe meshing joint 1 from being broken prior to the circular pipes 36 and 37 in the event of an earthquake or the like, thereby preventing the pipes from being destroyed at once.
By joining the respective parts of the inner mesh joint 10 and the outer mesh joint 20 by welding to each other, it has high strength and compression strength and can be prevented from being deformed, so that piping by the propulsion method can be performed.

The thickness of the annular plates 11 and 21 of the inner mesh joint 10 and the outer mesh joint 20 was 5 mm to 18 mm. As the thickness of the annular plates 11 and 21 becomes thinner than 5 mm, the strength of the annular plates 11 and 21 tends to be insufficient and deforms easily. As the thickness becomes thicker than 18 mm, the workability is lacking and the weight tends to increase and the handling becomes difficult. It is because it was found that there is.
Moreover, the thickness of the inner cylinder part 12 and the outer cylinder part 22 was formed in 3 mm-12 mm. As the thickness of the inner cylinder portion 12 and the outer cylinder portion 22 becomes thinner than 3 mm, the strength tends to be insufficient and deformation during propulsion tends to occur. As the thickness becomes thicker than 12 mm, the weight increases and the handling becomes difficult. This is because it was found that there is a tendency to become.
The outer peripheral protrusion 13 and the inner peripheral protrusion 23 were arranged at the same pitch. The inner mesh joint 10 and the outer mesh joint 20 are opposed to each other while being shifted by a half pitch in the circumferential direction so that the outer circumferential projection 13 and the inner circumferential projection 23 are staggered, and the inner cylindrical portion 12 of the outer cylindrical portion 22 is arranged. The flexible pipe meshing joint 1 can be assembled only by being inserted inside and rotated by a half pitch.

The inner protective collar 25 and the outer protective collar 30 were made of a metal such as steel, stainless steel, chrome steel, carbon steel and the like and formed into a cylindrical shape having a plate thickness of 2 mm to 12 mm. As the plate thickness becomes thinner than 2 mm, the rigidity and wear resistance tend to decrease and the internal water-stopping material 38 and the external water-stopping material 39 tend to be damaged. As the plate thickness becomes thicker than 12 mm, the weight increases. This is because it has been found that the workability and workability are increased and the flexibility of the flexible pipe joint 1 tends to be lowered.
As shown in FIG. 4, staggered cut portions 30a were formed in the external protective collar 30 by laser processing. Accordingly, when the combination type flexible tube 35 is bent and deformed, the cut portion 30a of the external protective collar 30 on the pulling side can be opened in a mesh shape and the external protective collar 30 can be deformed. Flexibility can be ensured, and the internal water blocking material 38 and the external water blocking material 39 can be protected. The width, length, and pitch of the cut portion 30a were determined in consideration of the outer diameter of the circular tubes 36, 37, the plate thickness of the external protective collar 30, the allowable bending deformation amount, and the like. In addition, the shape of the cut portion 30a can be formed in a straight line, a square shape, a square shape, or a combination thereof, and these can be arranged with an inclination at a predetermined angle.

The external protective collar 30 is fixed to the circular pipes 36 and 37 by the anchor bars 32 arranged along the inner periphery of both end portions, so that when the external force is applied, the cut portion 30a is opened and various deformations are caused. It can correspond to. The inner protective collar 25 is fixed together with the outer mesh joint 20 when an external force is applied by embedding and fixing a substantially trapezoidal fixing embedded portion 26 formed on the circumference of one end portion in the circular tube 37. It can move and cope with various deformations.
When the anchor portions 11a and 21a disposed on the annular plates 11 and 21 of the inner mesh joint 10 and the outer mesh joint 20 are bent to the outer peripheral side and welded to the inner peripheral surface of the external protective collar 30, external protection is provided. The collar 30 and the flexible pipe meshing joint 1 can be firmly fixed, and handling is easy and workability can be improved.

As the internal water-stopping material 38 and the external water-stopping material 39, liquid rubber such as silicone rubber or polybutene that has fluidity before curing and high adhesion to metal was used. In particular, a condensation reaction type such as a dealcohol-free type RTV that reacts with moisture in the air at room temperature and cures in a rubbery form is easy to fill and has excellent workability, and the flexibility of the mesh joint 1 for a flexible tube. Watertightness can be ensured, and the reliability and durability of water stoppage are excellent.
Further, due to the stretchability and elasticity of the internal water-stopping material 38 and the external water-stopping material 39, it follows the deformation such as compression and tension generated in the flexible pipe meshing joint 1 (connecting portion) of the combined flexible pipe 35. be able to.

Next, a method for manufacturing a combined flexible tube using the flexible tube mesh joint of Embodiment 1 will be described below with reference to the drawings.
First, a joint connection process is demonstrated.
FIG. 5 is a schematic cross-sectional view of an essential part showing a joint connecting process of a combined flexible pipe using the flexible pipe engaging joint in the first embodiment.
In FIG. 5, 11 b is an inner peripheral contact portion that contacts the end of the inner protective collar 25 on the inner peripheral side of the annular plate 11 of the inner mesh joint 10, and 11 c is an outer peripheral side of the annular plate 11 of the inner mesh joint 10. The outer peripheral contact portion that contacts the inner peripheral surface of the outer protective collar 30, 40 is the inner peripheral surface of the inner cylindrical portion 12 of the inner mesh joint 10 and the inner peripheral contact portion 11 b of the annular plate 11 of the inner mesh joint 10. 41 is a primer treatment layer formed on the surface on the side, 41 is a primer formed on the outer peripheral surface of the outer cylindrical portion 22 of the outer mesh joint 20 and the outer surface abutting portion 11c side of the annular plate 11 of the inner mesh joint 10 It is a processing layer.

The inner mesh joint 10 and the outer mesh joint 20 are opposed to each other with a substantially half pitch shift in the circumferential direction so that the outer circumference projection 13 of the inner mesh joint 10 and the outer circumference projection 20 of the outer mesh joint 20 are alternated. (FIG. 1). After the inner cylinder part 12 and the outer cylinder part 22 are pushed in until the tips of the annular plates 21 and 11 come into contact with each other, the outer circumferential projection part 13 and the inner circumferential projection part 23 are half-engaged (positions coincide). Rotate the pitch.
The primer treatment layers 40 and 41 are formed in order to improve adhesiveness with each part in contact with the internal water-stopping material 38 and the external water-stopping material 39 filled in the internal water-stopping step and the external water-stopping step described later. The primer treatment process for forming the primer treatment layers 40 and 41 may be performed on the single inner mesh joint 10 and the outer mesh joint 20 before the joint coupling process, or after the joint coupling process. May be.

Next, the joint protection process will be described.
FIG. 6 is a schematic cross-sectional view of an essential part showing a joint protection process for a combined flexible pipe using the flexible pipe mesh joint in the first embodiment.
In FIG. 6, 42 is a primer treatment layer formed on the outer peripheral surface of the inner protective collar 25, and 43 is an inner mesh with the inner protective collar 25 and the inner peripheral contact portion 11 b side surface of the annular plate 11 of the inner mesh joint 10. An annular inner peripheral space 44 surrounded by the inner cylindrical portion 12 of the joint 10 and filled with the internal water blocking material 38, 44 is an inner surface of the inner protective collar 25 and the annular plate 21 of the outer meshing joint 20. A wedge-shaped gap adjusting piece 45 made of a synthetic resin and disposed at an important point on the circumference between the circumference and an end 45 of the inner protective collar 25 on the inner meshing joint 10 side. Temporary fixing members such as an adhesive tape and an adhesive sheet which are temporarily fixed to the annular plate 11 and prevent leakage of the internal water blocking material 38, 46 is a primer treatment layer formed on the inner peripheral surface of the outer protective collar 30, and 47 is an external Outside the annular plate 11 of the protective collar 30 and the inner mesh joint 10 An annular outer peripheral space surrounded by the surface on the abutting portion 11c side and the outer cylindrical portion 22 of the outer meshing joint 20 and filled with the external water blocking material 39, 48 is the inner peripheral surface and the outer side of the outer protective collar 30 This is a wedge-shaped interval adjusting piece made of synthetic resin and disposed at an important point on the circumference between the outer periphery of the annular plate 21 of the mesh joint 20.

In the joint protection process, an internal protection collar arrangement process and an external protection collar arrangement process are performed.
In the internal protective collar disposing step, the internal protective collar 25 is disposed on the inner periphery of the flexible pipe meshing joint 1, and an adhesive tape, an adhesive sheet or the like is attached to the inner meshing joint 10 side end of the internal protective collar 25. The temporary fixing member 45 is pasted and temporarily fixed to the inner peripheral contact portion 11b of the annular plate 11 of the inner mesh joint 10. At this time, between the outer peripheral surface of the inner protective collar 25 and the inner periphery of the annular plate 21 of the outer meshing joint 20, a wedge-shaped interval adjusting piece 44 is disposed at an important point on the circumference.
In the external protective collar arrangement step, the external protective collar 30 is arranged on the outer periphery of the flexible pipe meshing joint 1, and the stopper 31 is fixed to the back surface of the annular plate 11 of the inner meshing joint 10 with screws or the like. At this time, between the inner peripheral surface of the outer protective collar 30 and the outer periphery of the annular plate 21 of the outer meshing joint 20, a wedge-shaped interval adjusting piece 48 is disposed at an important point on the circumference.

By forming the primer treatment layers 42 and 46 on the inner protective collar 25 and the outer protective collar 30, the internal water-stopping material 38 and the external water-stopping material 39 filled in the internal water-stopping step and the external water-stopping step in the subsequent process Adhesiveness with the inner protective collar 25 and the outer protective collar 30 is improved.
The outer peripheral surface of the inner protective collar 25 and the inner peripheral contact portion 11b of the annular plate 21 of the outer meshing joint 20 are temporarily fixed by a temporary fixing member 45, and the inner circumferential surface of the outer protective collar 30 and the annular shape of the outer meshing joint 20 are fixed. By fixing the back surface of the plate 21 with the stopper 31, it is easy to handle until the internal water stop material 38 and the external water stop material 39 are filled in the internal water stop process and the external water stop process in the subsequent process. .
Further, by arranging the spacing adjustment pieces 44 and 48, between the outer peripheral surface of the inner protective collar 25 and the inner periphery of the inner cylindrical portion 12 of the inner mesh joint 10 and between the inner peripheral surface and the outer side of the outer protective collar 30. The heights of the inner circumferential side space portion 43 and the outer circumferential side space portion 47 formed between the outer cylindrical portion 22 and the outer circumferential portion 22 of the meshing joint 20 were made substantially constant over the entire circumference. This improves the filling properties of the internal water-stopping material 38 and the external water-stopping material 39 in the internal water-stopping step and the external water-stopping step in the subsequent process, and the finished thicknesses of the internal water-stopping material 38 and the external water-stopping material 39 are increased. It is uniform.
It should be noted that either the inner protective collar arrangement step or the outer protective collar arrangement step may be performed first. In addition, the primer treatment layers 42 and 46 are preferably formed on the inner protective collar 25 and the outer protective collar 30 before the inner protective collar arranging step and the outer protective collar arranging step because of excellent workability.

Next, an external water stop process and an internal water stop process are demonstrated.
FIG. 7A is a schematic cross-sectional view of the relevant part showing the state of filling with the external water-stopping material, and FIG. 7B is a schematic cross-sectional view of the relevant part showing the deformed state of the external water-stopping material.
In FIG. 7B, 49 is a gap generated between the annular plate 11 of the inner meshing joint 10 and the tip of the outer cylindrical portion 22 of the outer meshing joint 20 when the combined flexible pipe 35 is deformed.
As shown in FIG. 7A, in the external water stopping process, liquid rubber or the like is passed from the opening on the annular plate 21 side (space adjusting piece 48 side) of the outer mesh joint 20 to the outer space 47 (see FIG. 6). An external water blocking material 39 is filled.
The primer treatment layers 41 and 46 are formed on the entire surface in contact with the external water blocking material 39 in the outer circumferential side space portion 47 so that the respective portions in the outer circumferential side space portion 47 and the external water blocking material 39 are securely bonded. be able to. In particular, the external water blocking material 39 is filled without a gap between the inner peripheral surface of the outer protective collar 30 and the outer peripheral surface of the outer cylindrical portion 22 of the outer mesh joint 20, so that water can be reliably stopped. Excellent reliability.

Since the external water blocking material 39 has sufficient stretchability, when the cut portion 30a of the external protective collar 30 is opened along with the deformation of the connecting portion of the combined flexible tube 35 (flexible tube meshing joint 1). As shown in FIG. 7B, the external water blocking material 39 can be stretched to obtain a good deformed state, and water blocking can be ensured.
Further, the cut portion 30a of the outer protective collar 30 is formed at a position away from the tip (inner peripheral projection portion 23 side) within the range of the outer cylindrical portion 22 of the outer mesh joint 20. Thereby, even if the combination-type flexible tube 35 is deformed and the gap 49 is generated, the cut portion 30a and the gap 49 do not overlap with each other, so a part of the external water blocking material 39 is provided in the vicinity of the cut portion 30a and the gap 49. Even if a crack or the like occurs, the external water-stopping material 39 is not completely torn and water-stopping can be maintained.

FIG. 8A is a schematic cross-sectional view of the relevant part showing the filling state of the internal water blocking material, and FIG. 8B is a schematic cross-sectional view of the relevant part showing the deformation state of the internal water blocking material.
In FIG. 8B, 50 is a gap generated between the annular plate 11 of the inner meshing joint 10 and the tip of the inner protective collar 25 when the combined flexible tube 35 is deformed, and 51 is the inner meshing joint 10. It is a gap generated between the tip of the inner cylinder portion 12 and the annular plate 21 of the outer mesh joint 20.
As shown in FIG. 8A, in the internal water stopping step, liquid rubber or the like is provided from the opening on the annular plate 21 side (space adjusting piece 44 side) of the outer mesh joint 20 to the inner circumferential side space portion 43 (see FIG. 6). The inner water blocking material 38 is filled.
The primer treatment layers 40 and 42 are formed on the entire surface in contact with the internal water blocking material 38 in the inner circumferential side space portion 43, so that each part in the inner circumferential side space portion 43 and the internal water blocking material 38 can be securely connected. Can be glued. In particular, the internal water blocking material 38 is filled without a gap between the outer peripheral surface of the inner protective collar 25 and the inner peripheral surface of the inner cylindrical portion 12 of the inner meshing joint 10, so that water can be reliably stopped. Excellent reliability.
In addition, after the internal water blocking material 38 is hardened, the temporary fixing member 45 is removed.

Since the internal water blocking material 38 has sufficient stretchability, the annular plate 11 and the internal protective collar of the inner mesh joint 10 are deformed along with the deformation of the connecting portion (flexible tube mesh joint 1) of the combined flexible tube 35. As shown in FIG. 8 (b), the internal water blocking material 38 can be stretched to obtain a good deformation state when the space is opened to 25, and water blocking can be ensured.
Since the gap 50 and the gap 51 do not overlap, even if a crack or the like occurs in a part of the internal water-stopping material 38 near the gap 50 or the gap 51 due to internal pressure or the like, the external water-stopping material 38 is completely torn. There is no, and water stoppage can be maintained.
In addition, either an external water stop process and an internal water stop process may be performed first, and may be performed simultaneously.
In the present embodiment, only one end side of the inner protective collar 25 is embedded and fixed in the circular tube 37 by the fixing embedded portion 26, and the flexibility of the flexible pipe meshing joint 1 is ensured with the other end side as a free end. However, as in the case of the outer protective collar 30, intermittent cuts are formed in the circumferential direction and / or the axial direction of the inner protective collar 25, and the other end is also fixed to the annular plate 11 of the inner mesh joint 10. May be. As with the external protective collar 30, the cut portion is opened and a good deformation state can be obtained.

Next, the concrete placing process will be described.
The flexible pipe mesh joint 1, the internal protective collar 25, and the external protective collar 30, which are integrated through the internal water-stopping material 38 and the external water-stopping material 39, are set in a mold for centrifugal molding, and concrete is injected. While performing centrifugal molding.
Anchor portions 11a and 21a disposed on the annular plates 11 and 21 of the inner mesh joint 10 and the outer mesh joint 20 by centrifugal molding, a fixing embedded portion 26 formed at one end of the inner protective collar 25, and external protection The combined flexible tube 35 can be integrally formed by embedding the anchor muscle 32 of the collar 30 in the circular tubes 36 and 37.

As described above, the flexible pipe mesh joint according to Embodiment 1 has the following effects.
(1) Both the inner mesh joint 10 and the outer mesh joint 20 are integrally formed, have a small number of parts and are excellent in productivity, are easy to handle, and can be connected easily.
(2) The inner mesh joint 10 and the outer mesh joint 20 are intermittently provided on the outer peripheral projection 13 and the outer peripheral portion 22 which are intermittently projected on the outer periphery of the inner cylinder 12 and the outer periphery of the outer cylinder 22, respectively. Therefore, the connecting operation can be performed simply by rotating the outer peripheral protrusion 13 and the inner peripheral protrusion 23 so as to mesh with each other.
(3) Since the inner meshing joint 10 and the outer meshing joint 20 have the inner cylinder part 12 and the outer cylinder part 22 erected perpendicularly to the surfaces of the annular plates 11 and 21, respectively, the inner cylinder part 12 and Axial force can be transmitted by bringing the tip of the outer cylindrical portion 22 into contact with the surfaces of the annular plates 21 and 11, and propulsion can be performed when buried in the soil.
(4) Since the inner cylinder portion 12 of the inner mesh joint 10 and the outer cylinder portion 22 of the outer mesh joint 20 are concentrically arranged and combined, not only against tension and bending, but also against external forces such as torsion However, it is deformable and has excellent practicality.
(5) The inner meshing joint 10 and the outer meshing joint 20 are respectively provided with an outer peripheral projection 13 projecting from the outer periphery on the distal end side of the inner cylindrical portion 12 and an inner periphery projecting from the inner periphery on the distal end side of the outer cylindrical portion 22. Since the peripheral protrusion 23 is included, the outer peripheral protrusion 13 and the inner peripheral protrusion 23 can mesh with each other and can be prevented from being deformed with respect to a tensile external force that is greater than expected.
(6) Since the inner mesh joint 10 and the outer mesh joint 20 have the anchor portions 11a and 21a standing on the circumference on the back surfaces of the annular plates 11 and 21, the inner mesh joint 10 and the outer mesh joint. The anchor portions 11a and 21a can be embedded in the concrete and firmly fixed by simply setting the 20 in the mold and putting in the concrete.

The combined flexible tube using the flexible tube mesh joint in the first embodiment has the following effects.
(1) The two circular pipes 36 and 37 are connected by the inner mesh joint 10 and the outer mesh joint 20 disposed on the respective opening end faces 36a and 37a, and the outer periphery of the flexible pipe mesh joint 1 The inner protective collar 25 and the outer protective collar 30 are arranged on the side and inner peripheral side, and the internal water-stopping material 38 and the external water-stopping material 39 are filled between the flexible pipe mesh joint 1. It can be set as the connection structure which has flexibility and can ensure airtightness and watertightness.
(2) Since the number of parts is small and the outer peripheral protrusion 13 of the inner mesh joint 10 and the inner peripheral protrusion 23 of the outer mesh joint 20 can be connected by simply engaging, positioning and connection work is easy and workability is improved. In addition to being excellent in compression, tension and bending, it is flexible enough to respond to torsion around the central axis of the circular pipe, and requires no special techniques or materials for connection and requires less man-hours. It can be manufactured and has excellent mass productivity.
(3) With respect to an external force greater than expected, deformation can be prevented by the rigidity of the inner mesh joint 10 and the outer mesh joint 20, so that dirt and the like enter the circular pipes 36 and 37 after being buried in the soil. Can be prevented.
(4) Since the inner meshing joint 10 and the outer meshing joint 20 have high strength and axial strength, they can be used for piping by the propulsion method.
(5) Since the inner mesh joint 10 and the outer mesh joint 20 can be manufactured at a factory separately from the circular pipes 36 and 37, quality control is easy and dimensional accuracy can be achieved.
(6) Since the external water-stopping material 39 is covered with the external protective collar 30, it is possible to prevent the external water-stopping material 39 from being damaged during the construction of the combined flexible pipe 35.
(7) The external protective collar 30 formed in a cylindrical shape has a cut portion 30a formed intermittently in the circumferential direction and / or the axial direction, so that it can be deformed against external forces such as tension, bending, and twisting. Therefore, the external water blocking material 39 and the flexible pipe meshing joint 1 can be protected without impairing the flexibility and watertightness of the flexible pipe meshing joint 1 (connecting portion).
(8) Since the external protective collar 30 and the external water blocking material 39 filled inside the external protective collar 30 are provided, the flexible pipe meshing joint 1 is protected and dirt and sand enter the circular pipes 36 and 37. Water-tightness can be secured.
(9) The flexible pipe meshing joint 1 is water-stopped by just filling the outer water-stopping material 39 between the outer periphery of the outer cylindrical portion 22 of the outer meshing joint 20 and the inner circumference of the outer protective collar 30. Can be ensured, and the productivity is excellent.
(10) The inner water stop material 38 is filled between the inner periphery of the inner cylindrical portion 12 of the inner meshing joint 10 and the outer periphery of the inner protective collar 25 to stop the water, thereby combining with the outer water stop material 39. The circular pipes 36 and 37 can be double protected from flooding, and watertightness can be ensured even when one of the waterstops breaks.
(11) Since the internal water-stopping material 38 and the external water-stopping material 39 are liquid rubbers, the filling performance is excellent, and the inside and outside of the flexible pipe mesh joint 1 can be water-stopped to ensure watertightness. Due to the elasticity and stretchability of the water stop material 38 and the external water stop material 39, it is possible to cope with deformation such as tension, compression, bending, etc., and the flexibility of the combined flexible tube 35 can be maintained.
(12) Since the internal water-stopping material 38 and the external water-stopping material 39 are liquid rubbers, filling can be easily performed using a syringe or the like.
(13) The cut portions 30a formed intermittently in the circumferential direction of the external protective collar 30 are arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis of the external protective collar 30, and adjacent cut portions 30a are surrounded by each other. Since they are arranged in a zigzag pattern shifted by a predetermined interval in the direction, the cut portion 30a of the external protective collar 30 on the pull side is opened in a mesh shape when deformed by an external force, and the flexibility of the combined flexible tube 35 can be secured. .

According to the method for manufacturing a combined flexible tube using the flexible tube mesh joint in the first embodiment, the following operations are provided.
(1) By simply engaging the outer peripheral protrusion 13 of the inner meshing joint 10 and the inner peripheral protrusion 23 of the outer meshing joint 20 with each other by the joint coupling step, the coupling work can be performed and the assembly workability is excellent. .
(2) The internal joint collar 25 and the external protective collar 30 are disposed on the inner circumference side of the inner mesh joint 10 and the outer circumference side of the outer mesh joint 20 by the connecting portion protection step, respectively, so that the flexible pipe mesh joint is provided. 1 can be protected, and the integrated joint for flexible tube 1 and the internal protective collar 25 and the external protective collar 30 are easy to handle and excellent in workability.
(3) By simply filling the inner water-stopping material 38 between the inner cylindrical portion 12 of the inner mesh joint 10 and the inner protective collar 25 by the inner water-stopping step, the flexibility of the combined flexible tube 35 can be increased. Without lowering, the inner peripheral side of the flexible pipe engaging joint 1 can be surely stopped.
(4) The flexibility of the combined flexible tube 35 can be increased by simply filling the outer water stop material 39 between the outer cylinder portion 22 of the outer mesh joint 20 and the outer protective collar 30 by the outer water stop process. Without lowering, the outer peripheral side of the flexible pipe engaging joint 1 can be surely stopped.

(Embodiment 2)
FIG. 9A is a cross-sectional view of an essential part showing a combined flexible tube using the flexible tube mesh joint in the second embodiment, and FIG. 9B is a diagram of the flexible tube mesh in the second embodiment. It is principal part sectional drawing which shows the deformation | transformation state of the combination type flexible tube using a coupling.
In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1, and description is abbreviate | omitted.
In FIG. 9, the combination-type flexible tube 35a using the flexible tube mesh joint in the second embodiment is different from the first embodiment in that it is placed on the inner peripheral side of the cylindrical portion 25b of the inner protective collar 25a. A point provided with a reinforced concrete portion 37b, and a point provided with an end protection plate 25c extending to the end of the cylindrical portion 25b of the inner protective collar 25a and covering the end of the reinforced concrete portion 37b. In addition, anchor bars 25d are provided on the outer periphery and the inner periphery of the inner protective collar 25a and embedded in the circular pipe 37 and the reinforced concrete portion 37b.

The end protection plate 25c is formed in an annular shape on the inner peripheral side of the inner protection collar 25a so as to be orthogonal to the cylindrical portion 25b. The width in the diameter direction of the end protection plate 25c can be appropriately selected according to the thickness of the circular tubes 36 and 37 to be molded.
Further, by arranging anchor bars 25d along the outer periphery and inner periphery of the cylindrical portion 25b of the inner protective collar 25a, the inner protective collar 25a, the circular tube 37, and the reinforced concrete portion 37b are securely fixed.
In addition, since the manufacturing method of the combination type flexible tube using the meshing joint for flexible tubes in Embodiment 2 is the same as that of Embodiment 1, description is abbreviate | omitted.

As described above, according to the combination-type flexible tube using the flexible tube mesh joint in the second embodiment, in addition to the operations in the first embodiment, the following operations are provided.
(1) By having a reinforced concrete portion 37b extending from the opening end face 37a of the other circular tube 37 and disposed on the inner peripheral side of the inner protective collar 25, the inner peripheral side of the flexible pipe meshing joint 1 Can be protected by the reinforced concrete portion 37b, and the axial force can be transmitted by bringing the tip of the reinforced concrete portion 37b into contact with the annular plate 11 of the inner mesh joint 10. The load applied to the pipe meshing joint 1 can be reduced, and propulsion can be performed even with the circular pipes 36 and 37 having a large pipe diameter, which is excellent in reliability.
(2) Since the end protection plate 25c is provided at the end of the cylindrical portion 25b of the inner protective collar 25a, the end of the reinforced concrete portion 37b disposed on the inner peripheral side of the inner protective collar 25 is protected. Therefore, it is possible to prevent the end portion of the reinforced concrete portion 37b from being damaged due to an external force or the like during propulsion construction or deformation, and to improve reliability.
(3) Set the flexible pipe mesh joint 1, the internal protective collar 25, and the external protective collar 30 integrated through the internal water-stopping material 38 and the external water-stopping material 39 in the mold and throw in the concrete. At this time, since the inner protective collar 25a (inner circumference) side surface of the annular plate 11 of the inner mesh joint 10 is covered by the end protective plate 25c, the tip of the reinforced concrete portion 37b is formed at the inner mesh joint 10 during molding. It is possible to prevent sticking to the annular plate 11, and it is not necessary to apply a release agent, and the productivity is excellent.

  The present invention provides an articulated joint for flexible pipes that is easy to assemble and secures high water-tightness with a simple structure with a small number of parts and does not require special members and techniques for connection, and is excellent in mass productivity. Providing a flexible flexible tube that has excellent flexibility and can realize a flexible pipe that prevents the breakage of the connecting portion, and can withstand axial force during propulsion, In addition, it is possible to provide a manufacturing method of a combined flexible tube excellent in assembling workability that can greatly reduce the number of production steps, and a flexible fume tube that can be suitably used as a propulsion tube or an external pressure tube. Can be realized.

The perspective view which shows the meshing joint for flexible tubes in Embodiment 1, an internal protective collar, and an external protective collar Sectional drawing which shows the principal part which shows the combination type flexible tube arrange | positioned in the pipe end part which contact | abuts the meshing joint for flexible pipes in Embodiment 1 Sectional drawing which shows the principal part which shows the bending deformation state of the combination type flexible tube using the meshing joint for flexible tubes in Embodiment 1 (A) Main part side view showing a combination-type flexible tube using the flexible pipe mesh joint in Embodiment 1 (b) Combination-type flexible tube using the flexible pipe mesh joint in Embodiment 1 (A) Enlarged view of part A in FIG. 4 (b) Cross-sectional schematic diagram of relevant parts showing a joint connecting step of a combination-type flexible pipe using the flexible pipe mesh joint in the first embodiment. Cross-sectional schematic diagram of relevant parts showing a joint protection process for a combined flexible pipe using the flexible pipe mesh joint in the first embodiment. (A) Main part cross-sectional schematic diagram showing the filling state of the external water-stopping material (b) Main part cross-sectional schematic diagram showing the deformation state of the external water-stopping material (A) Main part cross-sectional schematic diagram showing the filling state of the internal water-stopping material (b) Main part cross-sectional schematic diagram showing the deformation state of the internal water-stopping material (A) Main part sectional drawing which shows the combination type flexible tube using the flexible pipe meshing joint in Embodiment 2 (b) The combination type flexible pipe using the flexible pipe meshing joint in Embodiment 2 Sectional view showing the deformation of the main part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Meshing joint for flexible pipes 10 Inner meshing joints 11, 21 Annular plate 11a, 21a Anchor part 11b Inner circumference contact part 11c Outer circumference contact part 12 Inner cylinder part 13 Outer projection part 20 Outer mesh joint 22 Outer cylinder part 23 Inner peripheral projection 25, 25a Internal protection collar 25b Cylindrical part 25c End protection plate 25d, 32 Anchor bar 26 Fixing embedded part 30 External protection collar 30a Cut part 30b Connection part 31 Fixing bracket 35, 35a Combination type flexible tube 36, 37 Circular pipes 36a, 37a Opening end face 37b Reinforced concrete part 38 Internal water blocking material 39 External water blocking material 40, 41, 42, 46 Primer treatment layer 43 Inner peripheral side space 44, 48 Spacing adjustment piece 45 Temporarily fixed Member 47 Outer peripheral space 49, 50, 51 Clearance

Claims (7)

(A) An annular plate, an inner cylindrical portion standing perpendicular to the surface of the annular plate, an outer peripheral projection protruding intermittently on the outer periphery on the front end side of the inner cylindrical portion, and a back surface of the annular plate An anchor portion erected on the circumference of the inner mesh joint,
(B) an annular plate, an outer cylinder portion erected perpendicularly to the surface of the annular plate, an inner peripheral protrusion portion projecting intermittently on the inner periphery of the distal end side of the outer cylinder portion, and the annular plate An outer meshing joint having an anchor standing on the circumference of the back surface of
An interlocking joint for flexible tubes, comprising: One circular pipe in which the inner meshing joint of the flexible pipe meshing joint according to claim 1 is arranged on the end face of the opening, and the outer side of the flexible pipe meshing joint of claim 1 on the end face of the opening. Another circular pipe in which a meshing joint is disposed and the outer circumferential projection of the inner meshing joint and the inner circumferential projection of the outer meshing joint are meshed with each other and connected to the one circular pipe; and a cylindrical shape And an internal protective collar disposed on the inner peripheral side of the flexible pipe meshing joint, and a slit formed in a cylindrical shape and intermittently formed in the circumferential direction and / or the axial direction. An external protective collar disposed on the outer peripheral side of the flexible pipe meshing joint, and an internal water blocking material filled between the inner circumference of the inner cylindrical portion of the inner meshing joint and the outer circumference of the inner protective collar. And an external stopper filled between the outer periphery of the outer tube portion of the outer mesh joint and the inner periphery of the outer protective collar. Combinational flexible tube, characterized in that it comprises a timber, the. The combined flexible tube according to claim 2, wherein the internal water-stop material and the external water-stop material are liquid rubber. The cut portions formed intermittently in the circumferential direction of the external protective collar are arranged in a plurality of rows in the longitudinal direction of the central axis of the external protective collar, and the adjacent cut portions are arranged in a staggered manner in which the cut portions are displaced in the circumferential direction. The combined flexible tube according to claim 2, wherein the combined flexible tube is provided. 5. The reinforced concrete portion that extends from the end surface of the opening of the other circular pipe and is disposed on the inner peripheral side of the inner protective collar, 5. The combined flexible tube as described. 6. The combined flexible tube according to claim 5, further comprising an end protection plate extending at an end of the inner protective collar and covering an end of the reinforced concrete portion. The outer peripheral protrusion of the inner mesh joint of the flexible pipe mesh joint according to claim 1 and the inner peripheral projection of the outer mesh joint of the flexible pipe mesh joint according to claim 1 are engaged with each other. The inner protection collar and the outer protection collar according to any one of claims 2 to 6 are arranged on a coupling coupling step of coupling, and on an inner circumferential side of the inner meshing joint and an outer circumferential side of the outer meshing coupling, respectively. A joint protection step to be installed, an internal water stop step of filling the internal water stop material according to claim 2 between the inner tube portion of the inner mesh joint and the inner protection collar, and the outer mesh An external water-stopping process for filling the external water-stop material according to claim 2 between the outer tube portion of the joint and the external protective collar, and the internal water-stop material and the external water-stop material are integrated. The flexible pipe mesh joint, the inner protective collar, and the outer Method for manufacturing a combination-type flexible tube, characterized in that it comprises a concreting step of introducing concrete protection color was set in the mold frame, a.

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