JP3711414B1 - Flexible tube - Google Patents

Abstract

[PROBLEMS] A simple structure that does not require special technology for connection, can be easily installed, has excellent mechanical strength, ensures high water-tightness, has low rigidity below a set deformation, and is resistant to further deformation. It has high strength and rigidity, can prevent breakage of the connecting part, has excellent flexibility, can withstand axial force during propulsion work, has excellent workability and reliability, and is low in cost and mass-productive Providing excellent flexible tubes.
A connecting portion having an outer comb-shaped joint, an inner comb-shaped joint, and a connecting member inserted alternately into the connecting member inserting portion of the outer comb-shaped joint and the inner comb-shaped joint. An outer protective collar formed in a cylindrical shape and intermittently formed in the circumferential direction and disposed on the outer peripheral side of the connecting portion, and an anchor portion of the outer comb-shaped joint and the inner comb-shaped joint External water stop filled between the outer periphery of the outer peripheral side reinforcement portion of the outer comb-shaped joint and the outer protective collar, and the circular tube body on both sides formed integrally with the connecting portion and the outer protective collar. Material.
[Selection] Figure 1

Description

  The present invention has a flexible connecting portion at the substantially central portion of the circular pipe, so that it can withstand the load during construction and the earth pressure and water pressure after burial, and is flexible to deformation in the earth during an earthquake, etc. It corresponds to the flexible tube which can prevent the defect | deletion and crack of a circular tube corresponding to these, and can ensure airtightness and watertightness.

Conventionally, fume pipes are generally used as buried pipes in sewers, drainage channels, 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 center of the fume pipe.
(Patent Document 1) states that “a pair of T-shaped rigid ring bodies arranged opposite each other with a required gap therebetween, and an intervening space between the rigid ring bodies so that a space portion exists between the rigid ring bodies. A flexible portion comprising an elastic ring body integrated through a connecting means and an anchor projecting on the opposite side of the elastic ring body of both rigid ring bodies, and a rigid ring straddling both rigid ring bodies A fiber reinforced resin rigid layer is formed on the outer peripheral surface of the body, a heat shrinkable resin layer is formed on the outer peripheral surface of the concrete portion including the outer peripheral surface of the fiber reinforced resin rigid layer, and the mortar is filled with mortar in the space portion. A layered flexible fume tube is disclosed.
(Patent Document 2) states that “a cylindrical joint made of a flexible material such as rubber or synthetic resin that is connected so as to wrap the connection end portions of two fume pipes from outside, Two bulging portions that bulge inwardly from the outer peripheral surface of the joint are formed in tandem in the axial direction, and anchor portions embedded in the fume pipe are formed at both axial end portions. A “fume pipe flexible joint” in which an annular reinforcing member is disposed in a trough formed between the bulged portions is disclosed.
(Patent Document 3) states that in a flexible fume tube in which a concrete portion and a steel ring on the outer periphery thereof are divided into two in the middle portion in the length direction, and a flexible portion is provided between the two divided concrete portions. In addition, there is disclosed a flexible fume tube in which an extension margin portion is provided in an elastic ring constituting a flexible portion, and a grout material is filled between each steel ring and the elastic ring.
Japanese Patent No. 3260303 Japanese Patent No. 3320646 JP-A-11-325328

However, the above conventional techniques have the following problems.
(1) (Patent Document 1) has a problem that the manufacturing process is complicated because the connecting means for connecting the elastic ring and the rigid ring body must be embedded in advance when the elastic ring body, that is, rubber is vulcanized. Was.
Moreover, in order to ensure the water stop of the flexible part, the fiber-reinforced resin rigid layer and a part of the outer peripheral surface of the concrete are covered with a heat-shrinkable resin layer, and the heat-shrinkable resin layer is directly heated with a burner, It is necessary to heat the fume tube itself in a drying room (curing room) set at 50 ° C. to 60 ° C. for about 30 minutes, which lacks workability and causes damage to the elastic ring body due to heating. Had.
Furthermore, when the external force of bending or shearing exceeds the rigidity strength of the rigid layer or mortar layer due to unequal subsidence or earthquake, it is intensively applied to the rigid layer, mortar layer, and elastic ring body at the center of the flexible part. In addition, the rigid layer and the mortar layer are plastically deformed or broken, and there is a problem that reliable water tightness cannot be maintained.
(2) In (Patent Document 2), by forming two bulging portions that fold and bulge inward from the outer peripheral surface of the joint in the axial center portion in the axial direction, the joint width is increased. Large shear deformation, elongation deformation and contraction deformation can be obtained, but the axial length required for the connecting portion is long, and there is a problem that it is not suitable for application to a narrow structure.
Also, when the external force of bending or shearing exceeds the rigidity of the joint due to unequal subsidence or earthquake, the external force is intensively applied to the connecting part, and the joint is plastically deformed or broken, ensuring reliable water tightness. It had the problem that it could not be maintained.
(3) In Patent Document 3, a flexible part made of a steel ring or an elastic ring is fixed with bolts and nuts, and a grout material is filled between the steel ring and the elastic ring around an extension margin part. Therefore, there is a problem that the number of parts is large, the structure is complicated, and the assembling workability is lacking. Also, when the bending or shearing external force exceeds the rigidity of the flexible part due to uneven settlement or earthquake, the external force is concentrated on the steel ring, elastic ring, grout material, etc. of the flexible part. There was a problem in that reliable watertightness could not be maintained because plastic rings or elastic rings were plastically deformed or the grout material was broken.

  The present invention solves the above-mentioned conventional problems, does not require a special technique for connection with a simple structure, can be easily installed, has excellent mechanical strength, can ensure high water tightness, and is set Less rigid than deformation, high strength and rigidity against deformation beyond that, it can prevent breakage of the connecting part, excellent flexibility, can withstand axial force during propulsion construction An object is to provide a flexible tube that is excellent in reliability and reliability, low in cost, and excellent in mass productivity.

In order to solve the above problems, the flexible tube of the present invention has the following configuration.
The flexible tube according to claim 1 of the present invention includes: (a) an annular plate, a plurality of connecting plates that are vertically arranged in a comb-tooth shape at predetermined intervals on the surface of the annular plate, and the plurality A connecting member insertion portion formed on each of the connecting plates, an outer peripheral side reinforcing portion that surrounds the outer periphery of the plurality of connecting plates and is set up perpendicular to the surface of the annular plate, and a back surface of the annular plate An outer comb-shaped joint having a plurality of anchors standing on the circumference at a predetermined interval; (b) an annular plate; and orthogonal to the comb-teeth at a predetermined interval on the surface of the annular plate A plurality of standing connection plates, a connection member insertion portion formed on each of the plurality of connection plates, and surrounding the inner periphery of the plurality of connection plates, and standing perpendicular to the annular plate surface. And a plurality of anchor portions standing on the circumference at predetermined intervals on the back surface of the annular plate, facing the outer comb-shaped joint. An inner comb-shaped joint disposed; and (c) a connecting member inserted alternately into the connecting member insertion portion of the outer comb-shaped joint and the connection member insertion portion of the inner comb-shaped joint; A connecting portion having a cylindrical shape, a cut portion intermittently formed in the circumferential direction and / or the axial direction, and an outer protective collar disposed on the outer peripheral side of the connecting portion, and the outer comb. The circular pipe body on both sides formed integrally with the anchor part of the tooth-type joint and the inner comb-type joint through the connection part and the outer protective collar, and the outer peripheral side of the outer comb-type joint An external water-stop material filled between the outer periphery of the reinforcing portion and the external protective collar is included.

This configuration has the following effects.
(1) Since both the outer comb-type joint and the inner comb-type joint are integrally formed and the number of parts is small, handling is simple, and multiple types of joints are prepared according to the inner diameter or outer diameter of the tube body. A flexible tube can be easily produced only by this.
(2) A plurality of connecting plates for both the outer comb-type joint and the inner comb-type joint are erected perpendicularly in a comb-like shape at a predetermined interval on one side of the annular plate, so fine alignment is not required during assembly Thus, the connecting operation can be performed simply by rotating in the circumferential direction so that the connecting plates are shifted from each other by approximately a half pitch and engaged with each other.
(3) Both the outer comb-shaped joint and the inner comb-shaped joint are provided with a plurality of connecting plates standing vertically on one side of the annular plate at a predetermined interval in a comb-tooth shape, and they are arranged oppositely and connected. Therefore, the propulsive force can be transmitted by bringing the leading ends of both the connecting plates into direct contact with the opposed annular plates, and the piping work by the propulsion method can be performed.
(4) Since the plurality of connecting plates of the outer comb-type joint and the inner comb-type joint each have an outer peripheral side reinforcing part or an inner peripheral side reinforcing part surrounding the outer periphery or inner periphery, the rigidity is high and deformation due to external force is prevented. In addition, it is possible to prevent soil and sand from entering the flexible tube after being embedded in the soil.
(5) Since the plurality of connecting plates of the outer comb-shaped joint and the inner comb-shaped joint have the connecting member insertion portion, the outer comb-shaped joint and the inner side can be simply inserted through the connecting member insertion portion. Comb-type joints can be easily connected.
(6) Since there are a plurality of anchor portions erected on the circumference at predetermined intervals on the back surface of the annular plate of the outer comb-shaped joint and the inner comb-shaped joint, the connecting portion and the circular pipe bodies on both sides can be easily and It can be reliably connected and can be integrally formed as a flexible tube.
(7) The outer comb-shaped joint and the inner comb-shaped joint are arranged to face each other, and the connecting portion can be formed simply by inserting the connecting member into the connecting member inserting portion of each connecting plate. By simply inserting the external protective collar and filling the external water-stopping material, the connecting portion can be protected in a watertight manner.
(8) Since the external water-stopping material is covered with the external protective collar formed in a cylindrical shape, it is possible to prevent the external water-stopping material from being damaged during the propulsion construction of the flexible tube.
(9) 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. It is possible to protect the external water stop material and the connecting portion without impairing the flexibility and water tightness of the flexible tube.
(10) Since the connecting member is inserted into the connecting member insertion portion, it is possible to prevent the deformation beyond the required bending angle, prevent the external water stop material from being broken, and the flow down function inside the flexible tube Can be maintained.
(11) Since it has a cylindrical external protective collar and an external water blocking material filled inside the external protective collar, the connecting portion is protected to prevent intrusion of earth and sand into the flexible tube, and water tightness is ensured. Can be secured.
(12) Specially because the water-tightness can be ensured by water-sealing the connecting part simply by filling the outer water-stopping material between the outer periphery of the outer side reinforcing part of the outer comb-shaped joint and the outer protective collar. It is excellent in productivity without requiring complicated processes such as simple fixing means and adhesion.

Here, metals such as steel, stainless steel, chrome steel, and carbon steel are suitably used for the material of the annular plate, the connecting plate, the outer peripheral side, and the inner peripheral side reinforcing portion. 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.
Moreover, it is preferable that the annular plate, the connecting plate, the outer peripheral side and the inner peripheral side reinforcing portion are joined to each other by welding. Thereby, since the outer comb-shaped joint and the inner comb-shaped joint have high strength and compression strength, piping by the propulsion method can be performed.
The number of connecting plates is determined in consideration of the inner diameter of the flexible tube, the width and thickness of the connecting plate, and the like so that bending deformation or buckling does not occur below a required compressive load. Since the compression strength of the outer comb-type joint and the inner comb-type joint exceeds the compression strength of the circular tube body of the flexible tube, the connecting portion will not be broken before the flexible tube in the event of an earthquake, etc. Can be prevented from being destroyed at once.
The connecting member insertion portion is formed in a long hole shape by laser processing or the like. As a result, the connecting member can move in the horizontal direction during deformation of compression or tension, and flexibility can be ensured.
As the connecting member, engineer resin fibers such as nylon, fibers such as carbon fibers, and metal ropes or chains such as steel wires can be used, especially those with low stretch and excellent shear strength Are preferably used. Thereby, the deformation | transformation by the tension | tensile_strength more than required can be prevented, and the fracture | rupture of an external water stop material can be prevented.
In addition, by appropriately setting the lengths of the connecting member and the connecting plate, the connecting plate can be directly pressed by the connecting plate without applying a load to the connecting member during compression. The connecting member is formed into an annular shape by being inserted into the connecting member insertion portion and then caulked at both ends. This eliminates the need for special processing and improves productivity.

The external protective collar is made of a metal such as steel, stainless steel, chrome steel, carbon steel, etc., and is formed in a cylindrical shape, and intermittently cuts are formed on the outer periphery. Laser processing is preferably used for forming the cut portion.
The plate thickness of the external protective collar is preferably 2 mm to 12 mm. As the plate thickness becomes thinner than 2 mm, the rigidity and wear resistance of the external protective collar tend to decrease and the external waterstop material tends to break down. As the plate thickness becomes thicker than 12 mm, the rigidity of the external protective collar Is unnecessarily high, the weight is increased, workability and workability are lacking, and the flexibility of the connecting portion tends to decrease, which is not preferable.
The width, length, and pitch of the cut portion are determined in consideration of the outer diameter of the circular tube body, the thickness of the external protective collar, the allowable bending deformation amount, and the like. In addition, the shape of the cut part can be formed in a straight line shape, a square shape, a combination of these shapes, or a combination thereof, and these can be arranged at an angle with a predetermined angle. In addition, by forming intermittent cuts in the circumferential direction at the displacement location such as the center in the longitudinal direction of the external protective collar, it can be deformed in response to external forces of tension and 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 the anchor bars are arranged along the inner periphery of the outer protective collar, the outer protective collar and the circular pipe body can be securely fixed. Further, the anchor portions disposed on the annular plates of the outer comb-type joint and the inner comb-type 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 connecting portion can be firmly fixed, and handling is easy and workability can be improved.

As the external water-stopping material, liquid rubber such as silicone rubber or polybutene, which has fluidity before curing and has high adhesion to metal, is preferably used. Thereby, filling is easy and productivity is excellent, and flexibility and water tightness of the connecting portion can be ensured. Particularly, those having high elasticity after curing are excellent in reliability and durability.
The external water blocking material can be filled from a hole-shaped or groove-shaped filling port formed in the external protective collar and / or the annular plate. Thereby, it is possible to easily and reliably fill the outer water stop material between the outer periphery of the outer peripheral side reinforcing portion of the outer comb-shaped joint and the outer protective collar. When one or more filling holes are drilled in the longitudinal direction of the external protective collar or in the circumferential direction of the external protective collar and the annular plate, the filling state of the external water-stopping material can be confirmed from the filling opening and the air is expelled. Filling can be performed reliably, and additional filling can be performed at places where filling is insufficient, resulting in excellent reliability and workability.
In particular, in the case of using a two-liquid mixed type as the external water-stopping material, it is possible to prevent entrainment of air at the time of filling by vacuum defoaming and to secure filling properties.
Anchors connected to the outer comb-shaped joint and the inner comb-shaped joint annular plate by setting the connecting portion and the external protective collar integrated through the external water-stopping material in the mold and putting in the concrete. The portion is embedded in the circular tube body to form a flexible tube.

Invention of Claim 2 is a flexible tube of Claim 1, Comprising: It has the cut | interruption part formed in the cylindrical shape intermittently in the circumferential direction and / or the axial direction. An internal protective collar disposed on the inner peripheral side, and an internal water-stop material filled between the inner peripheral side of the inner peripheral side reinforcing portion of the inner comb-shaped joint and the internal protective collar. It has a configuration.
With this configuration, in addition to the operation of the first aspect, the following operation is provided.
(1) By filling an internal water-stopping material between the inner peripheral side reinforcing part of the inner comb-shaped joint and the internal protective collar to stop the water, it is double-protected in combination with the external water-stopping material. Even when the external protective collar is broken, water tightness can be ensured.
(2) By having the internal protective collar, the inner peripheral surface of the flexible tube can be formed smoothly and the flow-down function can be maintained.
(3) Since the inner 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. It is possible to protect the internal water stop material and the connecting portion without impairing the flexibility and water tightness of the flexible tube.

Here, the same material as the above-described external protective collar and external water-stopping material can be suitably used as the material of the internal protective collar and internal water-stopping material, respectively. By having the internal protective collar and the internal water blocking material, it is possible to ensure the water tightness of the connecting portion, but it is preferable to take rust prevention measures for the outer comb-type joint and the inner comb-type joint. Thereby, even if the internal protective collar and the internal water-stopping material are broken and the connecting portion is in contact with water, it is possible to prevent rust from being generated, and it is possible to prevent the flexibility from being lowered due to rust.
The cut portion of the inner protective collar can be formed in the same manner as the cut portion of the outer protective collar.
Further, in order to fill the inner water-stopping material, the inner protective collar and / or the annular plate may be provided with one or more filling ports in the longitudinal direction or the circumferential direction in the same manner as the outer water-stopping material filling port. it can.
The inner protective collar is fixed at both ends by welding or the like with the annular plates of the inner comb-shaped joint and the outer comb-shaped joint.

Invention of Claim 3 is a flexible tube of Claim 1 or 2, Comprising: The said annular plate of the said inner side comb-shaped joint is an inner periphery of the said external protection collar in the outer peripheral side of the said annular plate. An outer peripheral abutting portion that forms an outer peripheral side space portion that is in contact with a surface and is filled with the outer waterstop material on the outer periphery of the connecting portion, and an outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate. And an inner periphery abutting portion that forms an inner periphery side space where the inner water stop material is filled in the inner periphery of the connecting portion.
With this configuration, in addition to the operation of the first or second aspect, the following operation is provided.
(1) Since the annular plate of the inner comb-shaped joint has an outer peripheral contact portion that contacts the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate, the outer protective collar is covered on the outer periphery of the connecting portion. Moreover, the outer peripheral side space part with which the outer periphery of a connection part is filled with an external water-stopping material can be formed, and an external water-stopping material can be filled reliably and water-stopping can be ensured.
(2) Since the annular plate of the inner comb-shaped joint has an inner peripheral contact portion that contacts the outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate, the inner protective collar is provided on the inner periphery of the connecting portion. When this is done, an inner peripheral space portion filled with the internal water-stopping material can be formed on the inner periphery of the connecting portion, and the internal water-stopping material can be reliably filled to ensure water-stopping.
(3) The annular plate of the inner comb-shaped joint is in contact with the outer peripheral contact portion that contacts the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate and the outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate. Since it has an inner peripheral abutment part, by assembling the connecting part and arranging the outer protective collar and the inner protective collar, the outer peripheral collar and the outer periphery of the outer comb-shaped joint outer peripheral part Between the outer peripheral surface of the inner and inner protective collars and the inner periphery of the inner peripheral side reinforcing portion of the inner comb-shaped joint, an annular outer peripheral space portion and inner periphery opened to the annular plate side of the outer comb-shaped joint, respectively. Since the side space can be formed, it is possible to easily fill the internal water-stopping material and the external water-stopping material in a short time from the opening on the annular plate side of the outer comb-shaped joint, thereby improving the workability. Can do.

Here, a substantially L-shaped fastener that fixes the inner peripheral surface of the outer protective collar and the back surface of the annular plate of the inner comb-shaped joint, and the outer peripheral surface of the inner protective collar and the rear surface of the annular plate of the outer comb-shaped joint, respectively. Are arranged at important points on the circumference. The fasteners are welded to the inner peripheral surfaces of the outer protective collar and the inner protective collar, and are fixed to the back surfaces of the annular plates of the inner comb-type joint and the outer comb-type joint by screws or the like. Thereby, until it fills with an external water-stop material and an internal water-stop material, a connection part, an external protective collar, and an internal protective collar can be handled easily, and workability | operativity can be improved.
In addition, between the inner peripheral surface of the outer protective collar and the outer periphery of the annular plate of the outer comb-shaped joint, and between the outer peripheral surface of the inner protective collar and the inner periphery of the annular plate of the outer comb-shaped joint, A wedge-shaped height adjustment piece is disposed at the upper point. Thus, between the inner peripheral surface of the outer protective collar and the outer periphery of the outer side reinforcing portion of the outer comb-shaped joint, and between the outer peripheral surface of the inner protective collar and the inner periphery of the inner peripheral side reinforcing portion of the inner comb-shaped joint. The height of the outer peripheral side space part and the inner peripheral side space part formed between them can be made almost constant over the entire circumference, and the external water stop material and the internal water stop material can be filled smoothly. At the same time, it is possible to make the finished thicknesses of the external water-stopping material and the internal water-stopping material uniform, reduce variations in the water stoppage, and improve the durability.

Invention of Claim 4 is a flexible tube of any one of Claims 1 thru | or 3, Comprising: The said external water-stop material and the said internal water-stop material are the structures which are liquid rubbers. ing.
With this configuration, in addition to the operation of any one of claims 1 to 3, the following operation is provided.
(1) Since the outer water-stopping material and the inner water-stopping material are liquid rubber, it has excellent filling properties, and water-tightness can be ensured by water-stopping the outside and the inside of the connecting portion. Due to the elasticity and stretchability of the material, it is possible to cope with deformation such as tension, compression and bending, and the flexibility of the connecting portion can be maintained.
(2) Since the external water-stopping material and the internal 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 which reacts with moisture in the air at room temperature and cures into a rubbery form 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 outer peripheral side reinforcing portion outer peripheral surface of the outer comb-shaped joint in contact with the outer water-stopping material and the inner water-stopping material, the inner peripheral side reinforcing portion inner peripheral surface of the inner comb-shaped joint, the inner peripheral surface and the inner portion of the outer protective collar Primer treatment is applied to the outer peripheral surface of the protective collar. The annular plate of the inner comb joint has an outer peripheral abutting portion that contacts the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate and an inner peripheral contact that contacts the outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate. When it has a contact part, it is preferable to also perform a primer process also on the outer peripheral contact part side and the inner peripheral contact part side surface of the annular plate facing the outer peripheral side space part and the inner peripheral side space part. Thereby, the adhesiveness of an external waterstop material and an internal waterstop material, and each part which contact | connects it can be improved, and it is excellent in watertightness. In particular, the outer peripheral surface tip portion and outer peripheral surface root portion (annular plate side) of the outer peripheral reinforcing portion of the outer comb-shaped joint, the inner peripheral surface tip portion and inner peripheral surface root of the inner peripheral reinforcing portion of the inner comb joint Part (annular plate side), the outer peripheral contact part side and inner peripheral contact part side surfaces of the inner comb-shaped joint, and the outer peripheral surface of the outer protective collar and the outer peripheral surface of the inner protective collar facing them By reliably bonding the corners of the water stop material and the internal water stop material, the water stop reliability is excellent.

If the external waterstop and the internal waterstop are sufficiently stretchable, the external waterstop and the internal waterstop will follow the opening of the cut portion of the external protective collar and the internal protective collar when the flexible tube is deformed. Because it expands and contracts, even if it adheres by applying primer treatment to the entire surface in contact with the external waterstop material and the internal waterstop material, the flexibility does not decrease, and it is excellent in the reliability of adhesion and improves waterstop it can.
Further, it is preferable that the cut portions of the outer protective collar and the inner protective collar are formed at positions overlapping the outer peripheral side reinforcing portion of the outer comb-shaped joint and the inner peripheral side reinforcing portion of the inner comb-shaped joint, respectively. As a result, even if the cut portions of the outer protective collar and the inner protective collar are opened when the flexible tube is deformed, the outer reinforcing surface of the outer comb-shaped joint and the inner peripheral reinforcing surface of the inner comb-shaped joint are formed. Water can be reliably stopped by the bonded external water-stopping material and internal water-stopping material, and the reliability and durability of water-stopping 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 connecting portion.

Invention of Claim 5 is a flexible tube of Claim 1, Comprising: The said outer peripheral side is the outer peripheral side of the back surface of the said annular plate of each of the said outer comb-shaped joint and the said inner comb-shaped joint. A cylindrical portion for adhering a water-stopping member erected on the same axis as the reinforcing portion and the inner peripheral-side reinforcing portion, and an outer periphery of each end portion facing the annular plate of the cylindrical portion for adhering the water-stopping member An annular portion for adhering to the water-stopping member, which is bonded and fixed to the cylindrical portion for adhering the water-stopping member and the annular portion for adhering the water-stopping member instead of the external water-stopping material and covers the outer periphery of the connecting portion. And a cylindrical outer water stop member that is provided and covered with the external protective collar.
With this configuration, in addition to the operation of the first aspect, the following operation is provided.
(1) A water-stopping member bonding cylindrical portion erected coaxially with the outer peripheral side reinforcing portion and the inner peripheral side reinforcing portion on the outer peripheral side of the back surface of each annular plate of the outer comb-shaped joint and the inner comb-shaped joint. Since each of the water-stopping member bonding cylindrical portions has an annular portion for water-stopping member bonding disposed on the outer periphery of the end facing the annular plate, the back surface and both end surfaces of the cylindrical outer water-stopping member are water-stopped. It can adhere | attach to the cylindrical part for member adhesion | attachment, and the cyclic | annular part for water stop member adhesion | attachment, respectively, and can protect a connection part watertight.
(2) Since the outer peripheral water stop member is covered with the external protective collar formed in a cylindrical shape, it is possible to prevent the outer peripheral water stop member from being damaged during the propulsion construction of the flexible tube.
(3) Since it has a cylindrical outer protective collar and an outer peripheral water stop member that covers the outer periphery of the connecting portion inside the outer protective collar, it protects the connecting portion and prevents dirt and sand from entering the inside of the flexible tube. While preventing, watertightness can be ensured.

Here, the same metal as the annular plate and the connecting plate described above is preferably used as the material for the cylindrical portion for water-stopping member bonding and the annular portion for water-stopping member bonding. It is formed integrally with the mold joint. Since the cylindrical portion for water-stopping member bonding and the annular portion for water-stopping member bonding are made of metal, the adhesiveness with the outer peripheral water-stopping member can be improved, and the watertightness is excellent.
As the outer peripheral water-stopping member, a rubber member such as nitrile rubber, ethylene propylene rubber, fluorine rubber, urethane rubber, or silicone rubber is preferably used. Since the outer peripheral water-stopping member has elasticity in the longitudinal direction of the flexible tube, the flexibility of the connecting portion can be maintained, breakage can be prevented from occurring when the connecting portion is deformed, and water tightness can be secured.

  The outer peripheral water-stopping member is formed in a band shape and is wound around the outer periphery of the connecting portion and bonded. Two or more outer peripheral water stop members may be laminated and disposed. Thereby, the thickness per sheet can be formed thinly, and it is excellent in workability, and it is easy to deform | transform and winding work is easy, and it is excellent in workability. Also, when laminating two or more outer peripheral water-stopping members, a woven fabric or synthetic resin film formed of carbon fiber or engineering resin fiber is sandwiched between the outer peripheral water-stopping member and the outer peripheral water-stopping member. Can do. As a result, the durability is increased and the outer water-stop members are not in contact with each other and are easily slipped, so that it is possible to prevent a decrease in stretchability. Also, when using a high-strength fiber such as aramid fiber coated with silicone oil as the outer peripheral water-stopping member, it is thin and excellent in flexibility and durability, and can maintain the flexibility and water tightness of the connecting portion. it can. In addition, you may fix an outer periphery water stop member with the volt | bolt in a key point.

A sixth aspect of the present invention is the flexible tube according to the fifth aspect of the present invention, comprising a cylindrical inner shield member disposed on the inner peripheral side of the connecting portion.
With this configuration, in addition to the operation of the fourth aspect, the following operation is provided.
(1) By having a cylindrical inner shield member on the inner peripheral side of the connecting portion, the connecting portion can be double protected from flooding together with the outer peripheral water stopping member, and an external protective collar or outer peripheral water stopping member Even when the rupture breaks, water tightness can be ensured.
(2) By having a cylindrical inner shield member on the inner peripheral side of the connecting portion, the inner peripheral surface of the flexible tube can be formed smoothly and the flow-down function can be maintained.
Here, as the inner shield member, a material made of rubber such as nitrile rubber, ethylene propylene rubber, fluorine rubber, urethane rubber, silicone rubber or the like is preferably used in the same manner as the outer peripheral water blocking member described above. When the inner shield member is stretchable in the longitudinal direction of the flexible tube, the flexibility of the connecting portion can be maintained, breakage can be prevented from occurring when the connecting portion is deformed, and water tightness can be secured. By bonding both ends of the outer periphery of the inner shield member to the inner peripheral surfaces of the annular plates of the outer comb-shaped joint and the inner comb-shaped joint, the inner side of the connecting portion can be stopped.

The invention according to claim 7 is the flexible tube according to claim 5 or 6, wherein the outer circumferential water stop member has a folded portion or a fold portion.
With this configuration, in addition to the operation of the fifth or sixth aspect, the following operation is provided.
(1) Since the outer peripheral water-stopping member has the folded portion or the fold portion, the folded-back portion or the fold portion can be easily extended to deform the outer peripheral water-stopping member when the connecting portion is deformed. Can be improved.
(2) Since the folded portion or the fold portion of the outer peripheral water stop member extends to cope with the deformation of the connecting portion, the outer peripheral water stop member hardly breaks and deteriorates to the outer peripheral water stop member even when repeatedly deformed. It is possible to improve durability and reliability.
Here, the length of the folded-back portion or the fold portion of the outer peripheral water-stopping member only needs to have a margin greater than the required deformation amount of the flexible tube, and does not require dimensional accuracy, so productivity and assembly workability are improved. Excellent.

The invention according to an eighth aspect is the flexible tube according to any one of the first to seventh aspects, wherein the outer protective collar and the slit formed intermittently in a circumferential direction of the inner protective collar. A portion is arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis of the outer protective collar and the inner protective collar, and the adjacent cut portions are arranged in a staggered manner with a predetermined interval in the circumferential direction. Have.
With this configuration, in addition to the operation of any one of claims 1 to 7, the following operation is provided.
(1) The slits intermittently formed in the circumferential direction of the outer protective collar and the inner protective collar are arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis of the outer protective collar and the inner protective collar, and are adjacent to each other. Since the parts are arranged in a staggered pattern with a predetermined interval in the circumferential direction, when the flexible tube is deformed, the outer protective collar on the pull side and the cut part of the internal protective collar open in a mesh shape and the external protective collar and the internal The protective collar can be deformed, the flexibility of the flexible tube can be ensured, and the outer water blocking material or the outer peripheral water blocking member and the inner water blocking material or the inner shield member can be protected.
Here, the cut portions of the outer protective collar and the inner protective collar are cut according to the outer diameter of the flexible tube so that the connecting portion is not cut within the deformation range of the connecting portion regulated by the connecting member. Select the length and pitch of the part. Thereby, even after a deformation | transformation, an external water stop material or an outer periphery water stop member and an internal water stop material or an inner side shield member can be protected reliably, and watertightness can be ensured.
In addition, by forming the cut part of the external protective collar and the internal 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 body, it is possible to prevent damage to the circular pipe body. Leakage of sewage flowing through the water can be prevented, and reliability is excellent.

A ninth aspect of the present invention is the flexible tube according to any one of the first to eighth aspects, comprising a reduced diameter portion formed at both ends of the external protective collar. ing.
With this configuration, in addition to the operation of any one of claims 1 to 8, the following operation is provided.
(1) Since the reduced diameter portion is embedded in the circular tube main body by having the reduced diameter portions formed at both ends of the external protective collar, the external protective collar is securely fixed and integrated with the circular tube main body. And durability can be improved.
Here, the reduced diameter portions at both ends of the external protective collar are formed by bending or squeezing both ends of the external protective collar toward the axial center side of the connecting portion.
When the reduced diameter portion is formed by a restriction, the end portion may be formed so as to be gradually narrowed inward (one direction), or one or a plurality of concave stops may be formed on the circumference. Good. In particular, when the concave strip is formed so that the outer diameter of the opening at both ends of the outer protective collar is slightly larger than the outer diameter of the tube body, the opening at both ends of the outer protective collar should be tightened by the mold. The connecting part and the external protective collar can be held, both ends of the external protective collar after the concrete is placed can be securely connected to the circular pipe body, the surface finish is clean, and the reliability and durability are excellent.

A tenth aspect of the present invention is the flexible tube according to any one of the first to ninth aspects, wherein the outer protective collar has a semi-cylindrical shape in a plane parallel to the longitudinal direction passing through the axis. It has the structure divided | segmented into.
With this configuration, in addition to the operation of any one of claims 1 to 9, the following operation is provided.
(1) Since the outer protective collar is divided into a semi-cylindrical shape in a plane parallel to the longitudinal direction passing through the shaft center, the connecting portion can be assembled from both sides, and the assembling workability is excellent.
(2) Since the outer protective collar is divided into a semi-cylindrical plane in a plane parallel to the longitudinal direction passing through the axis, it is possible to easily perform primer treatment on the inner peripheral surface of the outer protective collar, The inner peripheral surface of the outer protective collar and the outer peripheral surface of the outer comb-shaped joint and inner comb-shaped joint annular plate do not rub against each other during assembly, preventing the inner peripheral surface of the outer protective collar from being soiled and primer treatment. The applied part can be protected, and the adhesive force with the external water-stopping material can be secured.
(3) The external protective collar is divided into a semi-cylindrical plane that is parallel to the longitudinal direction passing through the axis, making it easy to manufacture and stacking and storing before assembly. Can be improved.

Here, the external protective collar divided into semi-cylindrical shapes is temporarily fixed so as to sandwich the connecting portion from both sides, and is joined by spot welding or the like.
The outer protective collar divided into semi-cylindrical shapes can be assembled with the connecting part sandwiched from both sides, so even if a reduced diameter part is formed at both ends, the reduced diameter part and the connecting part do not interfere with each other. And assembly work can be performed easily.

As described above, according to the flexible tube of the present invention, the following advantageous effects can be obtained.
According to invention of Claim 1, it has the following effects.
(1) Since both the outer comb-type joint and the inner comb-type joint are integrally formed and the number of parts is small, handling is simple, and multiple types of joints are prepared according to the inner diameter or outer diameter of the tube body. Thus, it is possible to provide a flexible tube excellent in productivity, which can be easily produced by a simple process.
(2) Since a plurality of connecting plates for both the outer comb-type joint and the inner comb-type joint are erected perpendicularly in a comb-like shape at a predetermined interval on one side of the annular plate, fine alignment is not required during assembly. Thus, it is possible to provide a flexible tube excellent in assembly workability and productivity that can be easily connected by rotating in the circumferential direction so that the connecting plates are shifted from each other by approximately half a pitch and meshing with each other. it can.
(3) Both the outer comb-shaped joint and the inner comb-shaped joint are provided with a plurality of connecting plates standing vertically on one side of the annular plate at a predetermined interval in a comb-tooth shape, and they are arranged oppositely and connected. Therefore, a flexible tube excellent in workability and functionality that can transmit a propulsive force by directly bringing the leading ends of both connecting plates into contact with an opposing annular plate and can perform piping work by a propulsion method. Can be provided.
(4) Since the plurality of connecting plates of the outer comb-type joint and the inner comb-type joint each have an outer peripheral side reinforcing part or an inner peripheral side reinforcing part surrounding the outer periphery or inner periphery, the rigidity is high and deformation due to external force is prevented. In addition, it is possible to provide a flexible tube excellent in reliability and functionality that can prevent earth and sand from entering the flexible tube after being embedded in the soil.
(5) Since the plurality of connecting plates of the outer comb-shaped joint and the inner comb-shaped joint have the connecting member insertion portion, the outer comb-shaped joint and the inner side can be simply inserted through the connecting member insertion portion. It is possible to provide a flexible tube that can easily connect comb-shaped joints and has excellent assembly workability.
(6) Since there are a plurality of anchor portions erected on the circumference at predetermined intervals on the back surface of the annular plate of the outer comb-shaped joint and the inner comb-shaped joint, the connecting portion and the circular pipe bodies on both sides can be easily and A flexible tube excellent in productivity that can be reliably connected and can be integrally formed as a flexible tube can be provided.
(7) The outer comb-shaped joint and the inner comb-shaped joint are arranged to face each other, and the connecting portion can be formed simply by inserting the connecting member into the connecting member inserting portion of each connecting plate. It is possible to provide a flexible tube excellent in productivity and reliability, which can protect the connecting portion in a watertight manner simply by being inserted into the external protective collar and filled with an external water blocking material.
(8) Since the external water-stopping material is covered with an external protective collar formed in a cylindrical shape, it is possible to prevent the external water-stopping material from being damaged during the propulsion construction of the flexible tube. An excellent flexible tube can be provided.
(9) 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. Thus, it is possible to provide a flexible tube excellent in reliability and functionality that can protect the external water-stopping material and the connecting portion without impairing the flexibility and water tightness of the flexible tube.
(10) Since the connecting member is inserted into the connecting member insertion portion, it is possible to prevent the deformation beyond the required bending angle, prevent the external water stop material from being broken, and the flow down function inside the flexible tube It is possible to provide a flexible tube excellent in reliability capable of maintaining the above.
(11) Since it has a cylindrical external protective collar and an external water blocking material filled inside the external protective collar, the connecting portion is protected to prevent intrusion of earth and sand into the flexible tube, and water tightness is ensured. A flexible tube excellent in reliability and functionality that can be ensured can be provided.
(12) The water-tightness can be ensured by water-sealing the connecting portion by simply filling the outer water-stopping material between the outer periphery of the outer side reinforcing portion of the outer comb-shaped joint and the outer protective collar. A flexible tube excellent in productivity and reliability that does not require complicated processes such as fixing means and adhesion can be provided.

According to invention of Claim 2, in addition to the effect of Claim 1, it has the following effects.
(1) By filling an internal water-stopping material between the inner peripheral side reinforcing part of the inner comb-shaped joint and the internal protective collar to stop the water, it is double-protected in combination with the external water-stopping material. In addition, even when the external protective collar is broken, it is possible to provide a highly flexible flexible tube that can ensure water tightness.
(2) By having the internal protective collar, it is possible to provide a flexible tube with excellent reliability that can smoothly form the inner peripheral surface of the flexible tube and maintain the flow-down function.
(3) Since the inner 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. In addition, it is possible to provide a flexible tube excellent in reliability that can protect the internal water blocking material and the connecting portion without impairing the flexibility and water tightness of the flexible tube.

According to invention of Claim 3, in addition to the effect of Claim 1 or 2, it has the following effects.
(1) Since the annular plate of the inner comb-shaped joint has an outer peripheral contact portion that contacts the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate, the outer protective collar is covered on the outer periphery of the connecting portion. In addition, it is possible to form an outer peripheral side space portion that is filled with an external water-stopping material on the outer periphery of the connecting portion, and to ensure the water-stop reliability by reliably filling the external water-stopping material. An excellent flexible tube can be provided.
(2) Since the annular plate of the inner comb-shaped joint has an inner peripheral contact portion that contacts the outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate, the inner protective collar is provided on the inner periphery of the connecting portion. When this is done, the inner periphery of the connecting portion can be formed with an inner periphery-side space that is filled with an internal water-stopping material, and the water-stopping can be ensured by filling the internal water-stopping material with certainty. It is possible to provide a flexible tube having excellent reliability.
(3) The annular plate of the inner comb-shaped joint is in contact with the outer peripheral contact portion that contacts the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate and the outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate. Since it has an inner peripheral abutment part, by assembling the connecting part and arranging the outer protective collar and the inner protective collar, the outer peripheral collar and the outer periphery of the outer comb-shaped joint outer peripheral part Between the outer peripheral surface of the inner and inner protective collars and the inner periphery of the inner peripheral side reinforcing portion of the inner comb-shaped joint, an annular outer peripheral space portion and inner periphery opened to the annular plate side of the outer comb-shaped joint, respectively. Since the side space can be formed, it is flexible with excellent workability that can be easily filled with the internal water-stopping material and the external water-stopping material in a short time from the opening on the annular plate side of the outer comb-shaped joint. A tube can be provided.

According to invention of Claim 4, in addition to the effect of any one of Claims 1 thru | or 3, it has the following effects.
(1) Since the outer water-stopping material and the inner water-stopping material are liquid rubber, it has excellent filling properties, and water-tightness can be ensured by water-stopping the outside and the inside of the connecting portion. It is possible to provide a flexible tube excellent in reliability that can cope with deformation such as tension, compression, and bending due to the elasticity and stretchability of the material and can maintain the flexibility of the connecting portion.
(2) Since the external water-stopping material and the internal water-stopping material are liquid rubbers, it is possible to provide a flexible tube excellent in productivity that can be filled easily using a syringe or the like.

According to invention of Claim 5, in addition to the effect of Claim 1, it has the following effects.
(1) A water-stopping member bonding cylindrical portion erected on the outer peripheral side of the back surface of each annular plate of the outer comb-shaped joint and the inner comb-shaped joint and coaxially with the outer peripheral side reinforcing portion and the inner peripheral side reinforcing portion. Since each of the water-stopping member bonding cylindrical portions has an annular portion for sealing the water-stopping member disposed on the outer periphery of the end facing the annular plate, the back surface and both end surfaces of the cylindrical outer water-stopping member are water-stopped. It is possible to provide a flexible tube excellent in reliability that can be bonded to the member bonding cylindrical portion and the water stop member bonding annular portion, respectively, and can protect the connecting portion in a watertight manner.
(2) Since the outer peripheral water-stopping member is covered with an external protective collar formed in a cylindrical shape, the outer peripheral water-stopping member can be prevented from being damaged at the time of propulsion construction of the flexible tube. An excellent flexible tube can be provided.
(3) Since it has a cylindrical outer protective collar and an outer peripheral water blocking member that covers the outer periphery of the connecting portion inside the outer protective collar, it protects the connecting portion and prevents dirt and sand from entering the inside of the flexible tube. It is possible to provide a flexible tube excellent in reliability and functionality capable of preventing and ensuring water tightness.

According to invention of Claim 6, in addition to the effect of Claim 5, it has the following effects.
(1) By having a cylindrical inner shield member on the inner peripheral side of the connecting portion, it is possible to protect the connecting portion from double flooding together with the outer peripheral water-stopping member. Even when the rupture breaks, it is possible to provide a flexible tube with excellent reliability capable of ensuring water tightness.
(2) By providing a cylindrical inner shield member on the inner peripheral side of the connecting portion, a flexible pipe excellent in reliability that can smoothly form the inner peripheral surface of the flexible pipe and maintain the flow-down function is provided. can do.

According to invention of Claim 7, in addition to the effect of Claim 5 or 6, it has the following effects.
(1) Since the outer peripheral water-stopping member has the folded portion or the fold portion, the folded-back portion or the fold portion can be easily extended to deform the outer peripheral water-stopping member when the connecting portion is deformed. Therefore, it is possible to provide a flexible tube excellent in flexibility and reliability.
(2) Since the folded portion or the fold portion of the outer peripheral water stop member extends to cope with the deformation of the connecting portion, the outer peripheral water stop member hardly breaks and deteriorates to the outer peripheral water stop member even when repeatedly deformed. It is possible to provide a flexible tube excellent in durability and reliability in which no occurrence occurs.

According to invention of Claim 8, in addition to the effect of any one of Claims 1 thru | or 7, it has the following effects.
(1) The slits intermittently formed in the circumferential direction of the outer protective collar and the inner protective collar are arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis of the outer protective collar and the inner protective collar, and adjacent cuts. Since the parts are arranged in a staggered pattern with a predetermined interval in the circumferential direction, when the flexible tube is deformed, the outer protective collar on the tension side and the cut part of the inner protective collar open in a mesh shape, and the outer protective collar and the inner The protective collar can be deformed, the flexibility of the flexible tube can be ensured, and the outer water-stopping material or the outer peripheral water-stopping member and the inner water-stopping material or the inner shield member can be protected with excellent reliability. A flexible tube can be provided.

According to invention of Claim 9, in addition to the effect of any one of Claims 1 thru | or 8, it has the following effects.
(1) By having the reduced diameter portions formed at both ends of the external protective collar, the reduced diameter portions are embedded in the circular tube body, and the external protective collar can be securely fixed and integrated with the circular tube body. A flexible tube excellent in reliability and durability can be provided.

According to the invention described in claim 10, in addition to the effect of any one of claims 1 to 9, the following effect is obtained.
(1) The external protective collar is divided into a semi-cylindrical shape in a plane parallel to the longitudinal direction passing through the shaft center, so that the connecting portion can be assembled from both sides, and assembly workability and productivity are improved. An excellent flexible tube can be provided.
(2) Since the outer protective collar is divided into two semi-cylindrical planes in a plane parallel to the longitudinal direction passing through the axis, primer processing can be easily performed on the inner peripheral surface of the outer protective collar. The inner peripheral surface of the outer protective collar and the outer peripheral surface of the outer comb-shaped joint and the inner comb-shaped joint annular plate do not rub against each other at the time of assembly, and the inner peripheral surface of the outer protective collar can be prevented from being soiled and subjected to primer treatment. The flexible tube excellent in the reliability and durability which can secure the adhesive force with an external water-stopping material can be provided.
(3) The external protective collar is divided into a semi-cylindrical shape in a plane parallel to the longitudinal direction passing through the axis, so that it is easy to manufacture and can be stacked and transported and stored before assembly. Thus, it is possible to provide a flexible tube excellent in handleability and transportability.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a cross-sectional side view of an essential part showing a flexible tube in Embodiment 1, and FIG. 2 is a cross-sectional side view of an essential part showing a bending deformation state of the flexible pipe in Embodiment 1. FIG. ) Is a cross-sectional side view of the main part showing the flexible tube in the first embodiment, and FIG. 3B is a side view of the main part cross-section showing the bending deformation state of the flexible tube in the first embodiment. (C) is the A section enlarged view in FIG.3 (b).
In FIG. 1 to FIG. 3, 1 is the flexible tube in the first embodiment, 2 and 3 are a connecting portion 4 disposed substantially at the center of the flexible tube 1, and a cylinder disposed on the outer peripheral side of the connecting portion 4. The circular tube main bodies 2a and 3a on both sides formed integrally with the outer protective collar 5 in the shape of the outer comb-shaped joint 10 (FIG. 2) and the inner comb-shaped joint 20 (FIG. 2) of the connecting portion 4 End surfaces of the tube main bodies 2 and 3 in which the anchor portions 11a and 21a are embedded, 2b and 3b are stepped outer peripheral portions of the tube main bodies 2 and 3 in which the outer protective collar 5 is disposed, and 5 is formed in a cylindrical shape. The slits 5a formed intermittently in parallel with the direction are arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis, and the adjacent slits 5a are arranged in a staggered manner with a predetermined interval in the circumferential direction. External protective collars arranged on the outer peripheral side of the stepped portions 2b and 3b, 5b is a cut portion of the external protective collar 5 The connection part 5c formed between a and the cut part 5a is a diameter-reduced part formed in a recess at both ends of the outer protective collar 5, and 6 is a cut formed in a cylindrical shape and intermittently in the circumferential direction. The portions 6a are arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis, and the adjacent cut portions 6a are arranged in a staggered manner with a predetermined interval in the circumferential direction and arranged on the inner peripheral side of the connecting portion 4 The internal protective collar 6b is a connecting portion formed between the cut portion 6a and the cut portion 6a of the internal protective collar 6, and 10 is steel, stainless steel, chromium steel, carbon disposed on the end surface 2a of the circular tube body 2 An outer comb-shaped joint made of metal such as steel (FIG. 2), 20 is an inner comb-shaped joint made of metal such as steel, stainless steel, chrome steel, carbon steel, etc. disposed on the end face 3a of the circular pipe body 3. (FIG. 2), 35 is an outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10. An external water-stopping material such as silicone rubber filled between the outer periphery and the outer protective collar 5, 40 is filled between the inner periphery of the inner peripheral side reinforcing portion 23 of the inner comb-shaped joint 20 and the inner protective collar 6. It is an internal water blocking material such as silicone rubber.

Next, the detail of the connection part of the flexible tube in Embodiment 1 is demonstrated.
FIG. 4 is an exploded cross-sectional view of the main part showing the connecting portion of the flexible tube in the first embodiment.
In FIG. 4, 11 is an annular plate of the outer comb-shaped joint 10, and 11 a is a plurality of outer comb-shaped joints 10 erected on the circumference of the annular plate 11 at a predetermined interval and embedded in the circular pipe body 2. , 12 are a plurality of connecting plates of the outer comb-shaped joint 10 which are vertically fixed in a comb-like shape at a predetermined interval on one surface of the surface of the annular plate 11, and 13 is an outer periphery of the connecting plate 12. An outer periphery side reinforcing portion of the outer comb-shaped joint 10 which is vertically fixed to the surface of the surrounding annular plate 11, 14 is a long hole-shaped connecting member insertion portion formed in the connecting plate 12, and 21 is an inner side An annular plate of the comb-shaped joint 20, 21 a is a plurality of anchor portions of the inner comb-shaped joint 20 that is erected on the circumference at a predetermined interval on the back surface of the annular plate 21 and embedded in the circular pipe body 3, and 21 b is an outer periphery The outer peripheral contact portion of the annular plate 21 that contacts the inner peripheral surface of the outer protective collar 5 on the side, 21c is the inner protective collar on the inner peripheral side The inner peripheral contact portion 22 of the annular plate 21 that contacts the outer peripheral surface of the inner plate 20 is a plurality of inner comb-shaped joints 20 that are vertically fixed at predetermined intervals on one side of the surface of the annular plate 21 at a predetermined interval. The connecting plate 23 is formed on the inner peripheral side of the inner comb-shaped joint 20, which is erected and fixed perpendicularly to the surface of the annular plate 21 on the inner peripheral side of the connecting plate 22, and 24 is formed on the connecting plate 22. The long hole-like connecting member insertion portion 30 is a connecting member made of steel wire or carbon fiber, which is alternately inserted into the connecting member insertion portions 14 and 24 of the connection plates 12 and 22.

By making the outer comb-shaped joint 10 and the inner comb-shaped joint 20 made of metal, it has a high mechanical strength and rigidity against deformation more than expected, and prevents the connection portion from being broken.
By joining the annular plates 11 and 21, the connecting plates 12 and 22, and the outer peripheral side and inner peripheral side reinforcing portions 13 and 23 to each other by welding, the outer comb-type joint 10 and the inner comb-type joint 20 have high strength and compression. It has proof stress and can perform piping by the propulsion method.
The number of connecting plates 12 and 22 was determined in consideration of the inner diameter of the flexible tube 1 and the width and thickness of the connecting plates 12 and 22 so that bending deformation and buckling would not occur below a required compressive load. When the compressive strength of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 exceeds the compressive strength of the circular tube bodies 2 and 3 of the flexible tube 1, the connecting portion is ahead of the flexible tube 1 in the event of an earthquake or the like 4 can be prevented from being broken, and the piping can be prevented from being destroyed at once.
By forming the connecting member insertion portions 14 and 24 into a long hole shape by laser processing or the like, the connecting member 30 can move in the horizontal direction during compression or tensile deformation, and flexibility can be ensured.

As the connecting member 30, in addition to a steel wire having low stretchability and excellent shear strength, use of a material made of engineer resin fiber such as nylon or carbon fiber to prevent deformation due to excessive tension. It is possible to prevent the external water-stopping material 35 and the internal water-stopping material 40 from being broken. The connecting member 30 was formed in an annular shape by caulking or welding both ends after being inserted into the connecting member insertion portions 14 and 24.
In addition, by appropriately setting the lengths of the connecting member 30 and the connecting plates 12 and 22, the connecting member 30 is not subjected to a load during compression, and the connecting plates 12 and 22 are directly connected to the connecting annular plates 11 and 22. 21 can be pressed, and piping by the propulsion method can be reliably performed.

The outer protective collar 5 and the inner protective collar 6 were made of a metal such as steel, stainless steel, chrome steel, and carbon steel in a cylindrical shape, and zigzag cut portions 5a and 6a were formed on the outer periphery by laser processing. Accordingly, when the flexible tube 1 is bent and deformed, the cut portions 5a and 6a of the external protective collar 5 and the internal protective collar 6 on the pulling side can be opened in a mesh shape, and the external protective collar 5 and the internal protective collar 6 can be deformed. (FIGS. 2 and 3), the flexibility of the flexible tube 1 can be ensured, and the external water blocking material 35 and the internal water blocking material 40 can be protected.
The plate thickness of the outer protective collar 5 and the inner protective collar 6 was 2 mm to 12 mm. As the plate thickness becomes thinner than 2 mm, the rigidity and wear resistance of the outer protective collar 5 and the inner protective collar 6 are lowered, and the external water-stopping material 35 and the internal water-stopping material 40 tend to be easily damaged. As the plate thickness becomes thicker than 12 mm, the rigidity of the outer protective collar 5 and the inner protective collar 6 becomes unnecessarily high, the weight increases, the workability and workability are lacking, and the flexibility of the connecting portion 4 tends to decrease. It turns out that there is a tendency to become.

The widths, lengths, and pitches of the cut portions 5a and 6a are the outer diameters of the tube main bodies 2 and 3 so that the connecting portion 4 is deformed by an external force of 30% to 60% of the bending strength of the tube main bodies 2 and 3. The outer protective collar 5 and the inner protective collar 6 are formed in consideration of the plate thickness, the amount of bending deformation allowed, etc., and the connecting portions 5b and 6b of the outer protective collar 5 and the inner protective collar 6 are determined not to be broken during deformation. did. Thereby, the external water stop material 35 and the internal water stop material 40 can be reliably protected.
The external protective collar 5 can be securely fixed to the circular pipe main bodies 2 and 3 by being embedded in the circular pipe main bodies 2 and 3 using the reduced diameter portions 5c formed at both ends as anchors.

In the present embodiment, the reduced diameter portion 5c is formed by constricting the concave stripe, but the end portion may be formed by gradually constricting the inner portion (in one direction), and the end portion may be formed on the axial center side of the connecting portion 4. You may bend and form. Note that a plurality of recessed diameter-reduced portions 5c can be formed, and can be fixed to the tube main bodies 2 and 3 more firmly.
Further, when the anchor portions 11a, 21a disposed on the annular plates 11, 21 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 are bent to the outer peripheral side and welded to the inner peripheral surface of the outer protective collar 5, The external protective collar 5 and the connecting portion 4 can be firmly fixed, and handling is easy and workability can be improved.
Due to the stretchability and elasticity of the external water-stopping material 35 and the internal water-stopping material 40, it is possible to follow the deformation of compression and tension generated in the connecting portion 4 of the flexible tube 1, and the external protective collar 5 and the internal protective collar 6 Can absorb the bending.
As the external water-stopping material 35 and the internal water-stopping material 40, liquid rubber such as silicone rubber or polybutene, which has fluidity before curing and has high adhesion to metal, was used. Thereby, filling is easy and the productivity is excellent, and the flexibility and water tightness of the connecting portion 4 can be secured, and the reliability and durability are excellent.

Next, details of the manufacturing method of the flexible tube in the first embodiment will be described.
FIG. 5 is a schematic cross-sectional view of the relevant part showing the connecting portion of the flexible tube in the first embodiment.
In FIG. 5, reference numeral 41 denotes a primer treatment layer formed on the outer periphery of the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10 and on the outer peripheral contact portion 21 b side surface of the annular plate 21 of the inner comb-shaped joint 20. The inner peripheral surface of the annular plate 11 of the outer comb-shaped joint 10, the inner peripheral surface of the inner peripheral side reinforcing portion 23 of the inner comb-shaped joint 20, and the inner peripheral contact portion 21 c of the annular plate 21 of the inner comb-shaped joint 20. It is the primer processing layer formed in the surface of the side.

First, a joint connection process is demonstrated.
The outer comb-shaped joint 10 and the inner comb-shaped mold are shifted by a substantially half pitch so that the connecting plate 12 of the outer comb-shaped joint 10 and the connecting plate 22 of the inner comb-shaped joint 20 are alternately engaged with each other. The joint 20 is disposed to face (not shown). Whether the connecting members 30 are alternately inserted into the connecting member insertion portions 14 and 24 formed on the plurality of connecting plates 12 and 22 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 and are caulked at both ends. It is formed into an annular shape by welding or the like. Thereafter, the tips of the connecting plates 12 and 22 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 are mutually attached to the surfaces of the annular plates 21 and 11 of the opposing inner comb-shaped joint 20 and outer comb-shaped joint 10. The outer comb-shaped joint 10 and the inner comb-shaped joint 20 are temporarily fixed so as to contact each other. Temporary fixing is performed by supporting the back surface of the annular plate 21 of the inner comb-shaped joint 20 and placing the connecting portion 4 vertically so that the outer comb-shaped joint 10 faces upward.
The primer treatment layers 41 and 42 are formed in order to improve the adhesion between the outer water-stopping material 35 and the inner water-stopping material 40 that are filled in a water-stopping material filling step, which will be described later, and the respective portions that are in contact therewith. In addition, you may perform the connection part primer process process which forms the primer process layers 41 and 42 in the connection part 4 with respect to the single-side outer comb-shaped joint 10 and the inner comb-shaped joint 20 before a joint connection process. And you may carry out with respect to the connection part 4 after a joint connection process.

Next, an external water stop process and an internal water stop process are demonstrated.
FIG. 6A is a schematic cross-sectional view of the main part showing the external protective collar disposing step and the internal protective collar disposing step, and FIG. 6B is a cross-sectional view taken along the line B-B in FIG. FIG. 6C is a cross-sectional view taken along the line CC in FIG.
In FIG. 6, reference numeral 43 denotes a substantially L-shaped stopper provided at a key point on the circumference for fixing the inner peripheral surface of the outer protective collar 5 and the rear surface of the annular plate 21 of the inner comb-shaped joint 20. Is a primer treatment layer formed on the inner peripheral surface of the outer protective collar 5, and 45 is the outer protective collar 5, the surface on the outer peripheral contact portion 21 b side of the annular plate 21 of the inner comb-shaped joint 20, and the outer comb-shaped joint 10. The outer circumferential side space portion 46 surrounded by the outer circumferential side reinforcing portion 13 and filled with the external water blocking material 35, 46 is the inner circumferential surface of the outer protective collar 5 and the outer circumference of the annular plate 11 of the outer comb-shaped joint 10. A wedge-shaped height adjusting piece 47 made of a synthetic resin and disposed at important points on the circumference between the outer peripheral surface of the inner protective collar 6 and the rear surface of the annular plate 11 of the outer comb-shaped joint 10. A substantially L-shaped stopper 48 disposed at an important point on the circumference of the outer periphery of the inner protective collar 6 and the stopper 47 The primer treatment layer 49 formed on the surface of the inner protective collar 6, 49 is the inner protective collar 6, the inner peripheral contact portion 21 c side surface of the annular plate 21 of the inner comb-shaped joint 20, and the inner comb-shaped joint 20. An annular inner circumferential space surrounded by the inner circumferential reinforcement 23 and filled with the inner water blocking material 40, 50 is the outer circumference of the inner protective collar 6 and the inner circumference of the annular plate 11 of the outer comb-shaped joint 10. Is a wedge-shaped height adjustment piece made of a synthetic resin and disposed at important points on the circumference.

In the external water stop process and the internal water stop process, after performing the external protection collar arrangement process and the internal protection collar arrangement process, the water stop material filling process is performed.
First, in the external protective collar disposing step, the fasteners 43 are welded to the important points on the inner peripheral surface of the external protective collar 5. The external protective collar 5 is disposed on the outer periphery of the connecting portion 4, and the stopper metal 43 is fixed to the back surface of the annular plate 21 of the inner comb-shaped joint 20 by screws or the like. At this time, between the inner peripheral surface of the outer protective collar 5 and the outer periphery of the annular plate 11 of the outer comb-shaped joint 10, a wedge-shaped height adjusting piece 46 is disposed at an important point on the circumference. The outer protective collar 5 was formed by dividing the outer protective collar 5 into a substantially semicylindrical shape so as to sandwich the connecting portion 4 from both sides of the connecting portion 4, and was joined and fixed by spot welding.
In the internal protective collar arrangement step, the stopper metal 47 is welded to the important point on the outer peripheral surface of the internal protective collar 6. The inner protective collar 6 is disposed on the inner periphery of the connecting portion 4, and the stopper 47 is fixed to the back surface of the annular plate 11 of the outer comb-shaped joint 10 by screws or the like. At this time, between the outer peripheral surface of the inner protective collar 6 and the inner periphery of the annular plate 11 of the outer comb-shaped joint 10, a wedge-shaped height adjusting piece 50 is disposed at an important point on the circumference.

By forming the primer treatment layers 44 and 48, the adhesion between the external water-stopping material 35 and the internal water-stopping material 40 and the external protective collar 5 and the internal protective collar 6 that are filled in the water-stopping material filling step described later is improved. I am letting.
The inner peripheral surface of the outer protective collar 5 and the back surface of the annular plate 21 of the inner comb-shaped joint 20 and the outer peripheral surface of the inner protective collar 6 and the rear surface of the annular plate 11 of the outer comb-shaped joint 10 are substantially L-shaped fasteners. By fixing with 43 and 47, handling until the external water-stopping material 35 and the internal water-stopping material 40 are filled in the subsequent water-stopping material filling step is facilitated.
Further, by arranging the height adjustment pieces 46 and 50, between the inner peripheral surface of the outer protective collar 5 and the outer periphery of the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10 and the outer peripheral surface of the inner protective collar 6. Height of the outer peripheral side space part 45 and the inner peripheral side space part 49 formed between the inner peripheral side reinforcing part 23 and the inner peripheral side reinforcing part 23 of the inner comb-shaped joint 20 is substantially constant over the entire circumference. . Thereby, the filling property of the external water-stopping material 35 and the internal water-stopping material 40 in the subsequent water-stopping material filling step is improved, and the finished thickness of the external water-stopping material 35 and the internal water-stopping material 40 is made uniform. .

Note that either the external protective collar arrangement step or the internal protective collar arrangement step may be performed first. Further, the protective color primer treatment step for forming the primer treatment layers 44 and 48 on the external protective color 5 and the internal protective color 6 is performed before the external protective color placement step and the internal protective color placement step.
In the present embodiment, in the external protective collar disposing step, the external protective collar 5 formed by being divided into a substantially semi-cylindrical shape is disposed so as to sandwich the connecting portion 4 from both sides of the connecting portion 4, and is joined by spot welding. Although fixed, the connecting portion 4 may be arranged so as to drop into the cylindrical outer protective collar 5.

Next, the water stop material filling step will be described.
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 deformation state of the external water-stopping material.
As shown in FIG. 7A, in the water-stopping material filling step, liquid is transferred from the opening on the annular plate 11 side (height adjustment piece 46 side) of the outer comb-shaped joint 10 to the outer space 45 (see FIG. 6). An external water blocking material 35 such as rubber is filled. Even if the external water blocking material 35 enters the connecting plates 12 and 22 through the gap between the outer peripheral reinforcing portion 13 and the annular plate 21, the flexibility of the connecting portion 4 is not affected.
The primer treatment layers 41 and 44 are formed on the entire surface in contact with the external water-stopping material 35 in the outer circumferential side space 45, so that each part in the outer circumferential side space 45 and the external water-stopping material 35 are securely bonded. be able to. In particular, the outer water-stopping material 35 is filled without any gap between the inner peripheral surface of the outer protective collar 5 and the outer peripheral surface of the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10, so that water can be reliably stopped. Can be reliable.

Since the external water blocking material 35 has sufficient elasticity, when the cut portion 5a of the external protective collar 5 is opened with the deformation of the connecting portion 4 of the flexible tube 1, as shown in FIG. In addition, the external water-stopping material 35 can be stretched to obtain a good deformation state, and water-stopping can be ensured.
Further, by forming the cut portion 5a of the outer protective collar 5 at a position overlapping the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10, the external water blocking material 35 adhered to the inner side of the cut portion 5a is used as the outer comb tooth. It can protect with the outer peripheral side reinforcement part 13 of the type | mold joint 10, makes it hard to generate | occur | produce the fracture | rupture of the external water stop material 35, and has improved the reliability and durability of water stop.

FIG. 8A is a schematic cross-sectional view of the relevant part showing the filling state of the internal water-stopping material, and FIG. 8B is a schematic cross-sectional view of the relevant part showing the deformation state of the internal water-stopping material.
As shown in FIG. 8 (a), in the water-stopping material filling step, from the opening on the annular plate 11 side (height adjustment piece 50 side) of the outer comb-shaped joint 10 to the inner circumferential space 49 (see FIG. 6). An internal water blocking material 40 such as liquid rubber is filled. In addition, even if the internal water blocking material 40 enters from the gap between the inner peripheral side reinforcing portion 23 and the annular plate 11 to the connecting plates 12 and 22 side, the flexibility of the connecting portion 4 is not affected.
The primer treatment layers 42 and 48 are formed on the entire surface in contact with the internal water blocking material 40 in the inner circumferential side space 49, so that each part in the inner circumferential side space 49 and the internal water blocking material 40 can be securely connected. Can be glued. In particular, the internal water-stopping material 40 is filled with no gap between the outer peripheral surface of the inner protective collar 6 and the inner peripheral surface of the inner peripheral side reinforcing portion 23 of the inner comb-shaped joint 20, so that the water is surely stopped. Can be reliable.

Since the internal water blocking material 40 has sufficient elasticity, when the cut portion 6a of the internal protective collar 6 is opened along with the deformation of the connecting portion 4 of the flexible tube 1, as shown in FIG. In addition, the internal water blocking material 40 can be stretched to obtain a good deformed state, and water blocking can be ensured.
Further, by forming the cut portion 6a of the inner protective collar 6 at a position overlapping the inner peripheral side reinforcing portion 23 of the inner comb-shaped joint 20, the inner water blocking material 40 adhered to the outer side of the cut portion 6a can be attached to the inner comb. It can protect with the inner peripheral side reinforcement part 23 of the tooth type joint 20, makes it difficult to generate | occur | produce the fracture | rupture of the internal water stop material 40, and has improved the reliability and durability of water stop.
In the water-stopping material filling step, either the external water-stopping material 35 or the internal water-stopping material 40 may be filled first or at the same time.

Next, the concrete placing process will be described.
Centrifugal forming while setting the connecting part 4, the external protective collar 5, and the internal protective collar 6 integrated through the external water-stopping material 35 and the internal water-stopping material 40 in a mold for centrifugal molding and putting concrete in. do.
Anchor portions 11a and 21a disposed on the annular plates 11 and 21 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 and the reduced diameter portions 5c formed at both ends of the outer protective collar 5 by centrifugal molding are circular tubes. The flexible tube 1 can be integrally formed by being embedded in the main bodies 2 and 3.
In particular, when the reduced diameter portion 5c is formed so that the outer diameters of the opening portions at both ends of the outer protective collar 5 are slightly larger than the outer diameters of the circular tube main bodies 2 and 3 to be molded, the outer protective collar 5 is formed by a mold. It is possible to hold the connecting portion 4 and the external protective collar 5 so as to tighten the opening portions at both ends, prevent the concrete from flowing out to the outer periphery of the external protective collar 5, and both ends of the external protective collar 5 after placing the concrete. The tube body 2 and 3 can be connected more firmly, and the surface finish is clean and excellent in reliability and durability.
It should be noted that the water stoppage is performed only at one location by the external waterstop material 35 and the internal waterstop material 40 may not be provided.

As described above, the flexible tube according to Embodiment 1 has the following effects.
(1) Since both the outer comb-type joint 10 and the inner comb-type joint 20 are integrally formed and the number of parts is small, handling is simple, and there are a plurality of types according to the inner diameter or outer diameter of the circular pipe bodies 2 and 3. The flexible tube 1 can be easily produced simply by preparing the joint.
(2) Since both the outer comb-shaped joint 10 and the inner comb-shaped joint 20 have a plurality of connecting plates 12 and 22 erected on one side of the annular plates 11 and 21 so as to be orthogonal to each other at predetermined intervals. Fine assembly is not required at the time of assembly, and the connecting operation can be performed simply by rotating in the circumferential direction so that the connecting plates 12 and 22 are shifted from each other by approximately a half pitch and are engaged with each other.
(3) A plurality of connecting plates 12 and 22 are erected perpendicularly in a comb-like shape at predetermined intervals on one surface of the annular plates 11 and 21 in both the outer comb-shaped joint 10 and the inner comb-shaped joint 20. Since they are arranged to be opposed to each other and connected, the propulsive force can be transmitted by directly abutting the tips of both connecting plates 12 and 22 to the opposing annular plates 11 and 21, and piping work by the propulsion method is performed. be able to.
(4) Since the plurality of connecting plates 12 and 22 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 have the outer peripheral side reinforcing portion 13 or the inner peripheral side reinforcing portion 23 surrounding the outer periphery or the inner periphery, respectively, rigidity Therefore, it is possible to prevent deformation due to external force and to prevent soil and sand from entering the flexible tube 1 after being buried in the soil.
(5) Since the plurality of connecting plates 12 and 22 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 have the connecting member insertion portions 14 and 24, the connecting member 30 is connected to the connecting member insertion portions 14 and 24. It is possible to easily connect the outer comb-shaped joint 10 and the inner comb-shaped joint 20 simply by inserting the.
(6) Since the plurality of anchor portions 11a and 21a are provided on the back surfaces of the annular plates 11 and 21 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 on the circumference at predetermined intervals, the connecting portion 4 And the circular pipe main bodies 2 and 3 on both sides can be connected easily and reliably, and can be integrally formed as the flexible pipe 1.
(7) The connecting portion 4 can be obtained by simply disposing the outer comb-shaped joint 10 and the inner comb-shaped joint 20 to face each other and inserting the connecting member 30 into the connecting member insertion portions 14 and 24 of the connecting plates 12 and 22. The connecting portion 4 can be protected in a watertight manner simply by inserting the connecting portion 4 into the external protective collar 5 and filling the outer water-stopping material 35 and the inner water-stopping material 40.
(8) Since the external water-stopping material 35 is covered with the external protective collar 5 formed in a cylindrical shape, the external water-stopping material 35 can be prevented from being damaged when the flexible tube 1 is propelled.
(9) A plurality of cut portions 5 a and 6 a intermittently formed in the circumferential direction of the outer protective collar 5 and the inner protective collar 6 are provided at a predetermined pitch in the longitudinal direction of the central axis of the outer protective collar 5 and the inner protective collar 6. Since the adjacent cut portions 5a and 6a are arranged in a row and arranged in a zigzag pattern shifted by a predetermined interval in the circumferential direction, the external protective collar 5 and the internal protective collar 6 on the pulling side when the flexible tube 1 is deformed. The cut portions 5a and 6a can be opened like a mesh to deform the outer protective collar 5 and the inner protective collar 6, and the flexibility of the flexible tube 1 can be ensured. 40 can be protected.
(10) Since the connecting member 30 is inserted into the connecting member insertion portions 14 and 24, deformation beyond a required bending angle can be prevented, and the external waterstop 35 can be prevented from being broken and flexible. The flow-down function inside the pipe 1 can be maintained.
(11) Since the cylindrical outer protective collar 5 and the external water blocking material 35 filled inside the outer protective collar 5 are provided, the connecting portion 4 is protected to prevent intrusion of earth and sand into the flexible tube 1. At the same time, water tightness can be secured.
(12) By just filling the outer water-stopping material 35 between the outer periphery of the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10 and the outer protective collar 5, the connecting portion 4 is water-stopped to ensure water tightness. Therefore, it is excellent in productivity without requiring a complicated process such as special fixing means or adhesion.
(13) By forming the connecting member insertion portions 14 and 24 in the shape of a long hole, the connecting member 30 can move in the horizontal direction during compression or tensile deformation, and flexibility can be ensured.
(14) By forming the connecting member insertion portions 14 and 24 in the shape of a long hole, the connecting members 12 and 22 are directly connected to the connecting annular plates 21 and 11 without applying a load to the connecting member 30 during propulsion. Can be pressed to perform piping.
(15) The inner water-stopping material 40 is filled between the inner peripheral side reinforcing portion 23 of the inner comb-shaped joint 20 and the inner protective collar 6 to stop the water. Thus, even if the external protective collar 5 is broken, water tightness can be secured.
(16) By having the inner protective collar 6, the inner peripheral surface of the flexible tube 1 can be formed smoothly and the flow-down function can be maintained.
(17) By using liquid rubber such as silicone rubber for the external water-stopping material 35 and the internal water-stopping material 40, the outside and the inside of the connecting portion 4 can be water-stopped to ensure watertightness, and the external water-stopping material 35 In addition, the elasticity and stretchability of the internal water blocking material 40 can cope with deformation such as tension, compression, and bending, and the flexibility of the connecting portion 4 can be maintained.
(18) Since the annular plate 21 of the inner comb-shaped joint 20 has the outer peripheral contact portion 21 b that contacts the inner peripheral surface of the outer protective collar 5 on the outer peripheral side of the annular plate 21, external protection is provided on the outer periphery of the connecting portion 4. When the collar 5 is covered, an outer peripheral side space 45 can be formed between the inner peripheral surface of the outer protective collar 5 and the outer periphery of the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10. The external water blocking material 35 can be filled.
(19) Since the annular plate 21 of the inner comb-shaped joint 20 has the inner peripheral contact portion 21 c that contacts the outer peripheral surface of the inner protective collar 6 on the inner peripheral side of the annular plate 21, When the inner protective collar 6 is covered, an inner peripheral space 49 may be formed between the outer peripheral surface of the inner protective collar 6 and the inner periphery of the inner peripheral reinforcing portion 23 of the inner comb-shaped joint 20. The internal water blocking material 40 can be reliably filled.
(20) The annular plate 21 of the inner comb-shaped joint 20 has an outer peripheral contact portion 21b that contacts the inner peripheral surface of the outer protective collar 5 on the outer peripheral side of the annular plate 21 and an inner protective collar on the inner peripheral side of the annular plate 21. 6 has the inner peripheral abutting portion 21c that abuts the outer peripheral surface of the outer peripheral collar 6, and the outer protective collar 5 and the inner protective collar 6 are arranged by assembling the connecting portion 4 so that the inner peripheral surface of the outer protective collar 5 and the outer comb Outer comb teeth are formed between the outer periphery of the outer peripheral reinforcement 13 of the tooth joint 10 and between the outer peripheral surface of the inner protective collar 6 and the inner periphery of the inner peripheral reinforcement 23 of the inner comb joint 20. Since the annular outer peripheral space 45 and the inner peripheral space 49 opened to the annular plate 11 side of the joint 10 can be formed, the outer comb-shaped joint 10 can be easily opened in a short time from the opening on the annular plate 11 side. Can be filled with the internal water-stop material 35 and the external water-stop material 40. It is possible to above.
(21) In the joint connecting step, the outer comb teeth are shifted by a substantially half pitch so that the connecting plate 12 of the outer comb-shaped joint 10 and the connecting plate 22 of the inner comb-shaped joint 20 are alternately engaged with each other. The mold joint 10 and the inner comb-shaped joint 20 are arranged opposite to each other, and are connected to the connecting member insertion portions 14 and 24 formed on the plurality of connection plates 12 and 22 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20. The connecting portions 4 can be easily assembled by inserting the connecting members 30 alternately and caulking both ends or forming them in a ring shape.
(22) A primer treatment layer at predetermined positions of the external protective collar 5, the outer comb-type joint 10, and the inner comb-type joint 20 in the connecting part primer treatment process and the protective color primer treatment process as a pre-process of the external water stop process By forming 41 and 44, each part in the outer peripheral side space part 45 and the external water-stop material 35 can be reliably bonded, and the inner peripheral surface of the outer protective collar 5 and the outer peripheral side of the outer comb-shaped joint 10 The outer water-stopping material 35 is filled with no gap between the outer peripheral surface of the reinforcing portion 13 and the water-stopping property can be secured, and the external water-stopping material 35 is extended along with the deformation of the connecting portion 4 of the flexible tube 1. Therefore, a good deformation state can be obtained, and the reliability and durability of water stoppage are excellent.
(23) In the external protective collar disposing step of the external water stopping step, the inner peripheral surface of the outer protective collar 5 with the fastener 43 welded to a key portion of the inner peripheral surface is the annular plate 21 of the inner comb-shaped joint 20. The outer protective collar 5 is disposed on the outer periphery of the connecting portion 4 so as to contact the outer peripheral contact portion 21b, and the fastener 43 is fixed to the back surface of the annular plate 21 of the inner comb-shaped joint 20 with screws or the like. The wedge-shaped height adjusting piece 46 is disposed at a key point on the circumference between the inner peripheral surface of the outer protective collar 5 and the outer periphery of the annular plate 11 of the outer comb-shaped joint 10. The height of the outer peripheral space 45 formed between the inner peripheral surface of the collar 5 and the outer periphery of the outer peripheral reinforcing portion 13 of the outer comb-shaped joint 10 can be made substantially constant over the entire circumference. Smooth filling of the external water-stopping material 35 to be filled in the subsequent water-stopping material filling step It can, be a finished thickness of the external water stopping material 35 uniformly, thereby improving the durability by reducing the variation in the water stop.
(24) When the external protective collar 5 is formed by dividing it into a substantially semi-cylindrical shape and is arranged so as to sandwich the outer periphery of the connecting portion 4 from both sides of the connecting portion 4 and is fixed by spot welding, the external protective collar 5 The connecting portion 4 and the external protective collar 5 can be assembled without damaging the primer treatment layer 44 formed in the above, and the adhesiveness of the external water blocking material 35 can be maintained.
(25) In the water-stopping material filling step of the external water-stopping step, the external water-stopping material 35 such as liquid rubber is filled from the opening on the annular plate 11 side (the height adjustment piece 50 side) of the outer comb-shaped joint 10. Thus, the outer water-stopping material 35 can be reliably filled in the outer peripheral side space 45, and water-stopping can be ensured.
(26) A primer treatment layer at predetermined locations of the inner protective collar 6, the outer comb-shaped joint 10, and the inner comb-shaped joint 20 in the connecting portion primer treatment process and the protective color primer treatment process as a pre-process of the internal water stop process By forming 42 and 48, each part in the inner peripheral side space 49 and the inner water stop material 40 can be securely bonded, and the outer peripheral surface of the inner protective collar 6 and the inner periphery of the inner comb-shaped joint 20 The internal water blocking material 40 is filled with no gap between the inner peripheral surface of the side reinforcing portion 23 to ensure water blocking, and the internal water blocking material 40 is deformed along with the deformation of the connecting portion 4 of the flexible tube 1. Can be stretched to obtain a good deformation state, and is excellent in the reliability and durability of water stoppage.
(27) In the internal protection collar disposing step of the internal water stopping step, the outer peripheral surface of the inner protective collar 6 in which the fastener 47 is welded to the outer peripheral surface is the inside of the annular plate 21 of the inner comb-shaped joint 20. The inner protective collar 6 is disposed on the inner periphery of the connecting portion 4 so as to contact the peripheral contact portion 21c, and the stopper 47 is fixed to the back surface of the annular plate 11 of the outer comb-type joint 10 by screwing or the like. The wedge-shaped height adjustment piece 50 is disposed at a key point on the circumference between the outer peripheral surface of the inner protective collar 6 and the inner periphery of the annular plate 11 of the outer comb-shaped joint 10. The height of the inner circumferential side space 49 formed between the outer circumferential surface of the collar 6 and the inner circumference of the inner circumferential side reinforcing portion 23 of the inner comb-shaped joint 20 can be made substantially constant over the entire circumference. It is possible to smoothly fill the internal water blocking material 40 that is filled in the subsequent water blocking material filling step. It is possible, can the finished thickness of the internal water stopping material 40 uniformly, thereby improving the durability by reducing the variation in the water stop.
(28) In the outer protective collar arrangement step and the inner protective collar arrangement step, the inner peripheral surface of the outer protective collar 5 and the rear surface of the annular plate 21 of the inner comb-shaped joint 20 and the outer peripheral surface and outer comb of the inner protective collar 6 By fixing the back surface of the annular plate 11 of the tooth-shaped joint 10 with substantially L-shaped fasteners 43 and 47, the outer water-stopping material 35 and the inner water-stopping material 40 are filled in the subsequent water-stopping material filling step. In the meantime, the connecting portion 4, the outer protective collar 5 and the inner protective collar 6 can be easily handled, and the workability can be improved.
(29) In the concrete placing process, the connecting portion 4, the external protective collar 5 and the internal protective collar 6 integrated through the external water-stopping material 35 and the internal water-stopping material 40 are set in the mold and put in the concrete. Then, by forming by centrifugal molding, the anchor portions 11a and 21a disposed on the annular plates 11 and 21 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 are embedded in the circular pipe bodies 2 and 3 to be flexible. The tube 1 can be formed integrally.
(30) In the concrete placing process, by embedding the reduced diameter portions 5c formed at both ends of the external protective collar 5 in the circular pipe main bodies 2 and 3 as anchors, it can be securely fixed to the circular pipe main bodies 2 and 3, When the reduced diameter portion 5c is formed so that the outer diameter of the opening at both ends of the outer protective collar 5 is slightly larger than the outer diameter of the tube main bodies 2 and 3, the opening at both ends of the outer protective collar 5 is formed by a mold. The connecting part 4 and the external protective collar 5 can be held in such a manner that the connection between the ends of the external protective collar 5 and the circular pipe bodies 2 and 3 after the concrete is placed can be further strengthened, and the surface finish is also improved. It is clean, reliable and durable.
(31) The cut portions 5a and 6a of the outer protective collar 5 and the inner protective collar 6 overlap with the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10 and the inner peripheral side reinforcing portion 23 of the inner comb-shaped joint 20, respectively. By forming, even if the cut portions 5a and 6a of the outer protective collar 5 and the inner protective collar 6 are opened when the flexible tube 1 is deformed, the outer peripheral surface and inner side of the outer peripheral side reinforcing portion 13 of the outer comb-shaped joint 10 are formed. Water can be reliably stopped by the external water-stopping material 35 and the internal water-stopping material 40 bonded to the inner peripheral surface of the inner peripheral side reinforcing portion 23 of the comb-shaped joint 20, and the reliability and durability of the water stop can be improved. Can be improved.

(Embodiment 2)
FIG. 9 is an exploded cross-sectional view of the main parts showing the connecting portion of the flexible tube, the outer protective collar, the outer water blocking member, and the inner shield member in the second embodiment, and FIG. 10 shows the flexible tube in the second embodiment. FIG. 11 is a sectional side view of an essential part showing a bending deformation state of the flexible tube in the second embodiment.
In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1, and description is abbreviate | omitted.
10 to 11, the flexible tube in the second embodiment is different from the first embodiment in that the outer comb-shaped joint 10 and the inner comb-shaped joint 20 of the flexible tube 1 a are each annular plate 11, The water-stopping member bonding cylindrical portions 15 and 25 are provided on the outer peripheral side of the back surface of the outer peripheral side coaxially with the outer peripheral-side reinforcing portion 13 and the inner peripheral-side reinforcing portion 23, and the respective water-stopping member bonding cylindrical portions 15 and 25. The point which has the water stopping member adhesion | attachment annular parts 16 and 26 arrange | positioned in the edge part outer periphery facing the annular plates 11 and 21 of this, and it replaces with the external water stop material 35, and the cylindrical parts 15 and 25 for water stop member adhesion | attachment And a point having an outer circumferential water stop member 35a having a folded portion 35d in which a water stop member back surface 35c and a water stop member end surface 35b are respectively bonded to the water stop member bonding annular portions 16 and 26, and an internal protective collar 6 and the inner water stop material 40 are arranged on the inner peripheral side of the connecting portion 4 and both ends are In that with side comb-shaped joint 10 and the inner comb joint 20 each annular plate cylindrical inner shield member 40a which is adhered to the inner peripheral surface of 11 and 21.

The same material as the annular plates 11 and 21 and the connecting plates 12 and 22 described above is used as the material for the cylindrical portions 15 and 25 for the water-stopping member and the annular portions 16 and 26 for the water-stopping member. The mold joint 10 and the inner comb-shaped joint 20 were formed integrally. Since the cylindrical portions 15 and 25 for water-stopping member bonding and the annular portions 16 and 26 for water-stopping member bonding are made of metal, the adhesiveness with the outer peripheral water-stopping member 35a can be improved, and the watertightness is excellent.
The outer peripheral water blocking member 35a and the inner shield member 40a are made of rubber such as nitrile rubber, ethylene propylene rubber, fluorine rubber, urethane rubber, etc., and thus have elasticity in the longitudinal direction of the flexible tube 1a. In addition, it is possible to maintain the flexibility, and it is possible to prevent breakage when the connecting portion 4 is deformed, and to secure water tightness.
The outer peripheral water-stopping member 35a and the inner shield member 40a were formed in a band shape and were wound around and bonded to the outer periphery and inner periphery of the connecting portion 4.

In addition, the outer peripheral water-stopping member 35a can be formed by laminating two or more layers, so that the thickness per sheet can be formed thin and excellent in workability, and is easy to be deformed and easy to handle and wind. Excellent. At this time, by inserting a woven fabric or a synthetic resin film formed of carbon fiber or engineering resin fiber between the outer peripheral water stop member 35a and the outer peripheral water stop member 35a, durability is increased and Since the water members 35a are not in contact with each other and easily slip, it is possible to prevent a decrease in stretchability.
Moreover, when the thing which apply | coated silicone oil to high strength fibers, such as an aramid fiber, is used as the outer periphery water stop member 35a, it is thin and excellent in a softness | flexibility and durability, and is excellent in the flexibility and watertightness of the connection part 4. FIG.

Next, the details of the method for manufacturing the flexible tube of the second embodiment will be described.
The manufacturing method of the flexible tube according to the second embodiment is different from the manufacturing method of the flexible tube according to the first embodiment in the external water stopping process and the internal water stopping process. Since it is the same, description is abbreviate | omitted.
First, an external water stop process is demonstrated.
First, in the water stop member disposing step, a part of the belt-shaped outer periphery water stop member 35a is folded to form a folded portion 35d and wound around the outer periphery of the connecting portion 4 to stop water at both ends of the outer periphery water stop member 35a. The member end surface 35b and the water stop member back surface 35c are bonded to the water stop member bonding annular portions 16 and 26 and the water stop member bonding cylindrical portions 15 and 25 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20, respectively.
As long as the folded portion 35d of the outer circumferential water stop member 35a has a length equal to or longer than the deformation amount of elongation allowed for the flexible tube 1a, it does not require dimensional accuracy regardless of its shape or formation location. It can be assembled easily and has excellent productivity and assembly workability.
Although the folded portion 35d is formed in the present embodiment, a bellows-like fold portion may be formed instead of the folded portion 35d.
Next, in the external protective collar disposing step, the external protective collar 5 formed in a substantially semi-cylindrical shape is disposed so as to sandwich the connecting portion 4 from both sides of the connecting portion 4, and is joined and fixed by spot welding.

Next, an internal water stop process is demonstrated.
The inner shield member 40a formed in a belt shape is wound around the inner periphery of the connecting portion 4, and the inner peripheral surfaces of the annular plates 11 and 21 of the outer comb joint 10 and the inner comb joint 20 are respectively connected to both ends of the inner shield member 40a. Adhere to.
In addition, the order of the external water stop process and the internal water stop process may be reversed.

As described above, the flexible tube according to the second embodiment has the following operation in addition to the operation of the first embodiment.
(1) Stops erected on the outer peripheral side of the back surface of each of the annular plates 11 and 21 of the outer comb-shaped joint 10 and the inner comb-shaped joint 20 coaxially with the outer peripheral side reinforcing portion 13 and the inner peripheral side reinforcing portion 23 Since it has the cylindrical part for water-member adhesion | attachment and the annular parts 16 and 26 for water-stopping member adhesion | attachment arrange | positioned in the edge part outer periphery facing the annular plates 11 and 21 of each cylindrical part 15 and 25 for water-stopping member adhesion | attachment. The back surface 35c and both end surfaces 35b of the cylindrical outer water blocking member 35a can be bonded to the water blocking member bonding cylindrical portions 15 and 25 and the water blocking member bonding annular portions 16 and 26, respectively. Watertight protection is possible.
(2) Since the outer peripheral water stop member 35a is covered with the external protective collar 5 formed in a cylindrical shape, it is possible to prevent the outer peripheral water stop member 35a from being damaged when the flexible tube 1 is propelled.
(3) Since the cylindrical outer protective collar 5 and the outer peripheral water stop member 35a covered on the outer periphery of the connecting portion 4 inside the outer protective collar 5 are provided, the connecting portion 4 is protected and the flexible tube 1 is brought into the interior. In addition to preventing the intrusion of earth and sand, water tightness can be secured.
(4) By having the cylindrical inner shield member 40a on the inner peripheral side of the connecting portion 4, the connecting portion 4 can be double protected from flooding together with the outer peripheral water blocking member 35a, and the external protective collar 5 Even when the outer peripheral water stop member 35a breaks, water tightness can be secured.
(5) By having the cylindrical inner shield member 40a on the inner peripheral side of the connecting portion 4, the inner peripheral surface of the flexible tube 1 can be formed smoothly and the flow-down function can be maintained.
(6) Since the inner shield member 40a has elasticity in the longitudinal direction of the flexible tube 1, the flexibility of the connecting portion 4 can be maintained, and breakage can be prevented from occurring when the connecting portion 4 is deformed. Watertightness can be secured.
(7) Since the outer circumferential water stop member 35a has the folded portion 35d, the folded portion 35d can be extended when the connecting portion 4 is deformed, and the outer peripheral water stopping member 35a can be easily deformed, and the flexibility of the connecting portion 4 Can be improved.
(8) Since the folded portion 35d of the outer peripheral water stop member 35a extends to cope with the deformation of the connecting portion 4, the outer peripheral water stop member 35a is unlikely to break, and even if subjected to repeated deformation, the outer peripheral water stop member 35a. No deterioration occurs and durability and reliability can be improved.

  The present invention has a flexible connecting portion at the substantially central portion of the circular pipe, so that it can withstand the load during construction and the earth pressure and water pressure after burial, and is flexible to deformation in the earth during an earthquake, etc. With regard to flexible pipes that can prevent breakage and cracking of the circular pipe and ensure airtightness and watertightness in response to the Excellent mechanical strength, high water tightness, low rigidity below set deformation, high strength and rigidity against deformation beyond that, flexible to prevent breakage of connecting part That can withstand axial forces during propulsion work, can be provided with flexible pipes that are excellent in workability and reliability, low in cost, and excellent in mass productivity. it can.

Cross-sectional side view of main parts showing a flexible tube in the first embodiment Cross-sectional side view of the main part showing the bending deformation state of the flexible tube in the first embodiment (A) Main part side view showing the flexible tube in the first embodiment (b) Main part side view showing the bending deformation state of the flexible pipe in the first embodiment (c) Enlarged portion A in FIG. 3 (b) Figure The principal part disassembled sectional view which shows the connection part of the flexible tube in Embodiment 1 Cross-sectional schematic diagram of relevant parts showing the connecting portion of the flexible tube in the first embodiment (A) Schematic cross-sectional view of the main part showing the external protective collar disposing step and the internal protective collar disposing step (b) A cross-sectional view taken along the line BB in FIG. -C line cross-sectional view (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 The principal part exploded sectional view which shows the connection part of a flexible tube in Embodiment 2, an external protection collar, an outer periphery water stop member, and an inner side shield member Cross-sectional side view of a main part showing a flexible tube in a second embodiment Cross-sectional side view of the main part showing the bending deformation state of the flexible tube in the second embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Flexible pipe 2, 3 Circular pipe | tube main body 2a, 3a End surface 2b, 3b Periphery step part 4 Connection part 5 External protection collar 5a Cut part 5b Connection part 5c Shrinkage part 6 Internal protection collar 6a Cut part 6b Connection part 10 Outer comb-shaped joint 11, 21 Annular plate 11a, 21a Anchor part 12, 22 Connecting plate 13 Outer peripheral side reinforcing part 14, 24 Connecting member insertion part 15, 25 Cylindrical part 16, 25 for waterproofing member adhesion Annular part 20 inner comb-shaped joint 21b outer peripheral contact part 21c inner peripheral contact part 23 inner peripheral side reinforcing part 30 connecting member 35 external water stop material 35a outer peripheral water stop member 35b water stop member end face 35c water stop member back surface 35d Folding portion 40 Internal water blocking material 40a Inner shield member 41, 42, 44, 48 Primer treatment layer 43, 47 Fastening bracket 45 Outer peripheral side space portion 49 Inner peripheral side space portion 6,50 height adjustment piece

Claims (10)

(A) An annular plate, a plurality of connecting plates erected orthogonally on the surface of the annular plate at a predetermined interval, and connecting member insertion portions respectively formed on the plurality of connecting plates An outer peripheral side reinforcing portion that surrounds the outer periphery of the plurality of connecting plates and is erected perpendicularly to the surface of the annular plate, and a plurality of anchors that are erected on the circumference at predetermined intervals on the back surface of the annular plate An outer comb-shaped joint having a portion;
(B) an annular plate, a plurality of connecting plates erected orthogonally on the surface of the annular plate at predetermined intervals, and connecting member insertion portions formed respectively on the plurality of connecting plates And an inner peripheral side reinforcing portion that is provided so as to surround the inner periphery of the plurality of connecting plates and is orthogonal to the surface of the annular plate, and a plurality of members that are provided on the circumference of the annular plate at predetermined intervals on the circumference. An inner comb-shaped joint disposed opposite to the outer comb-shaped joint,
(C) a connecting member inserted alternately into the connecting member insertion portion of the outer comb-shaped joint and the connecting member insertion portion of the inner comb-shaped joint;
A connecting portion having
An external protective collar having a cut portion formed in a cylindrical shape and intermittently formed in the circumferential direction and / or the axial direction and disposed on the outer peripheral side of the connecting portion; the outer comb-shaped joint; and the inner comb Circular pipe bodies on both sides formed integrally with the anchor portion of the tooth-shaped joint through the connecting portion and the external protective collar, and the outer periphery and the outer portion of the outer peripheral reinforcing portion of the outer comb-shaped joint An external water blocking material filled between the protective collar and the flexible tube. An inner protection collar disposed on the inner peripheral side of the connecting portion, having a cut portion formed in a cylindrical shape and intermittently formed in the circumferential direction and / or the axial direction; and the inner side of the inner comb-shaped joint The flexible tube according to claim 1, further comprising an internal water blocking material filled between an inner periphery of a peripheral reinforcing portion and the internal protective collar. An outer peripheral side space portion in which the annular plate of the inner comb-shaped joint comes into contact with the inner peripheral surface of the outer protective collar on the outer peripheral side of the annular plate and the outer periphery of the connecting portion is filled with the external waterstop material. An outer peripheral contact portion to be formed and an inner peripheral space portion that contacts the outer peripheral surface of the inner protective collar on the inner peripheral side of the annular plate and is filled with the inner waterstop material on the inner periphery of the connecting portion. The flexible tube according to claim 1, further comprising an inner peripheral contact portion. The flexible tube according to any one of claims 1 to 3, wherein the outer water-stopping material and the inner water-stopping material are liquid rubber. Cylinders for water-stopping member bonding provided on the outer peripheral side of the back surface of the annular plate of each of the outer comb-shaped joint and the inner comb-shaped joint, and erected on the outer peripheral side reinforcing part and the inner peripheral side reinforcing part. Each of the cylindrical portions for adhering to the water-stopping member, and an annular portion for adhering the water-stopping member disposed on the outer periphery of the end facing the annular plate, instead of the external water-stopping material, A cylindrical outer water-stopping member which is bonded and fixed to the water-stopping member bonding cylindrical portion and the water-stopping member bonding annular portion and which is covered with the outer protective collar and is covered with the outer protective collar. The flexible tube according to claim 1. The flexible tube according to claim 5, further comprising a cylindrical inner shield member disposed on an inner peripheral side of the connecting portion. The flexible pipe according to claim 5 or 6, wherein the outer peripheral water stop member has a folded portion or a fold portion. The cuts formed intermittently in the circumferential direction of the outer protection collar and the inner protection collar are arranged in a plurality of rows at a predetermined pitch in the longitudinal direction of the central axis of the outer protection collar and the inner protection collar and are adjacent to each other. The flexible tube according to any one of claims 1 to 7, wherein the portions are arranged in a staggered manner with a predetermined interval in the circumferential direction. The flexible tube according to claim 1, further comprising a reduced diameter portion formed at both ends of the external protective collar. The flexible tube according to any one of claims 1 to 9, wherein the outer protective collar is divided into a semi-cylindrical shape in a plane parallel to a longitudinal direction passing through an axis.

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