JP2011231833A - Exterior member and connection structure of fluid pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cover and heat-retentively protect the end of a fluid pipe which is exposed by the axial contraction or the like of a coated pipe in a connecting point of the fluid pipe to a joint accommodated in a heat insulating material.SOLUTION: This external member 1 covers, from the heat insulating material 31 toward the coated pipe 22, the fluid pipe 21 which is exposed by an axial clearance S between the tip of the coated pipe 22 which is formed of a resin foam and inserted with the fluid pipe 21 and the heat insulating material 31 in which a T-joint 23 connected with the fluid pipe 21 is accommodated, and protects the fluid pipe. The external material 1 is formed into a cylindrical shape, has a connecting adhesive tape 6 joined to the heat insulating material 31 so as to be immovable in the axial direction, and accommodates the coated pipe 22 together with the fluid pipe 21 therein while the axial movement of the tip of the coated pipe 22 is permitted.

Description

  The present invention relates to an exterior member and a fluid for covering and protecting a connecting end of a fluid pipe exposed by an axial gap between a cladding tube covering the fluid pipe and a heat insulating material accommodating a joint to which the fluid pipe is connected. The present invention relates to a pipe connection structure.

  Conventionally, fluid pipes such as water supply pipes and hot water supply pipes are housed inside cladding pipes made of foamed resin for heat insulation, prevention of condensation, etc. The joint is covered with a heat insulating material made of a heat insulating material for heat insulation, prevention of condensation and the like. As this type of heat insulating material, for example, a heat insulating material for joints described in Patent Document 1 is disclosed. This heat-retaining material for joints is a heat-retaining material that covers the connection ends of the cheese joint and the fluid pipe. The joint-containing recess that houses the cheese joint to which the fluid pipe is connected, and the fluid pipe, The connection end accommodating recess for accommodating the connecting end together with the cladding tube is provided, and the connection end of the cheese joint and the fluid pipe is accommodated inside by closing the two-part body.

  In order to connect a fluid pipe to a joint accommodated in such a heat insulating material, it is necessary to expose the end of the fluid pipe from the tip of the cladding pipe, ie, the length necessary for the connection work to the joint, that is, the work allowance. There is. Therefore, the end portion of the fluid tube is exposed by cutting off the end portion of the cladding tube by a predetermined length or by forcibly compressing the end portion in the axial direction. When exposing the end of the fluid tube by cutting the end of the cladding tube for a predetermined length, after connecting the end of the fluid tube to the joint, the cladding tube with the end cut off is forcibly extended in the axial direction. The joint is pulled up to the joint and its end is housed inside the heat insulating material. Then, by closing the pair of halves constituting the heat insulating material and clamping the outer surface of the cladding tube from both sides, the end portion of the fluid tube together with the end portion of the cladding tube is placed in the connecting portion accommodating recess of the heat insulating material. These connecting ends are housed and connected to keep warm.

  On the other hand, when the end of the cladding tube is forcibly compressed in the axial direction without cutting and the end of the fluid tube is exposed to a predetermined length and connected to the joint, the forcible compression is released after the connection. Thus, the end portion of the cladding tube can be naturally restored to its original length and expanded, and thereafter can be accommodated in the connecting portion accommodating recess of the heat insulating material together with the end portion of the fluid tube without being forcibly expanded. .

JP 2004-124955 A

  However, when connecting the fluid pipe to the joint, in order to remove the coating of the cladding pipe at the end of the fluid pipe and secure the work allowance, first, the end of the cladding pipe is forcibly forced in the axial direction. When connecting the work by exposing the end of the fluid pipe while compressing it, it is necessary to connect while using one hand for compression, and it must be compressed with a considerable pressing force. It was difficult to work on.

  Therefore, there is a case where the end of the cladding tube is cut off by a predetermined length to expose the end of the fluid tube and connect the fluid tube to the joint. However, in this case, although the connection work of the fluid pipe can be performed smoothly, after connecting the fluid pipe to the joint, the cladding pipe is forcibly extended and pulled up to the joint, the heat insulating material is closed, and the fluid pipe and After the end portion of the cladding tube is clamped and covered, the cladding tube shrinks in an attempt to gradually return to its original state as time passes by the restoring force. Here, the end portion of the cladding tube is connected to the heat insulating material by closing the pair of half-divided bodies and holding the pressure from both sides. For this reason, the cladding tube overcomes the clamping force of the pair of half-divided bodies by contraction due to the restoring force and moves out of the heat insulating material. As a result, since the tip of the cladding tube is spaced apart from the heat insulating material in the axial direction, the end portion of the fluid tube is exposed by the separation length of the cladding tube, and the heat retaining effect and heat insulating effect of that portion are lost. In addition, after connecting the fluid pipe to the joint, when the end of the cladding pipe is forcibly extended and pulled up to the joint, a considerable pulling force is required. Furthermore, the appearance of this portion is reduced by separating the tip of the cladding tube from the heat insulating material due to the shrinkage.

In addition, since the cladding tube formed of the foamed resin is subjected to a tensile force in the axial direction during winding up to a roll at the time of molding, residual stress is generated after molding, and after unwinding from the roll and connecting to the joint Gradually contracts in the axial direction due to the restoring force. Therefore, the cladding tube also contracts by this restoring force after connection to the joint.
The shrinkage of the cladding tube is caused not only by the restoring force described above but also by thermal shrinkage caused by flowing hot water through the fluid pipe.

  Furthermore, if the heat insulating material and the joint are not fixed to the wall surface or the like, the fluid pipe may linearly expand due to heat, and the heat insulating material and the joint may be pushed by the fluid pipe and move in the same direction. On the other hand, since the cladding tube is thermally contracted and moves in the opposite direction, the cladding tube may come out of the heat insulating material and be separated.

  In order to prevent the end of the cladding tube from coming out of the heat insulating material due to contraction due to its restoring force, the joining tape is wound over the heat insulating material and the end of the cladding tube, or the stop pin is covered with the heat insulating material and the covering. It may be possible to stab across the end of the tube and firmly bond the sheathing tube and the heat insulating material, but the winding of the bonding tape is troublesome, and the appearance of this part may be impaired, and furthermore Since the free movement of the end portion of the cladding tube due to the shrinkage is hindered and an excessive tensile force is generated at the connection portion with the heat insulating material, and the end portion of the cladding tube may be cracked or wrinkled, it is not preferable.

  Also, when connecting the fluid pipe to the joint, shortening the cutting length at the end of the cladding pipe reduces the pulling force forcibly extending the cladding pipe to the joint and pulling it up, and keeps it in the heat insulating material. The amount of exposure of the fluid pipe after the coated pipe contracted can be reduced. However, since the length of the cut end of the cladding tube is shortened, the end of the cladding tube must be forced to be compressed in the axial direction. The problem is that it is very difficult to work, and as long as the fluid pipe is exposed, some heat retention measures are still required for that part.

  In view of this, the present invention provides an exterior member and a fluid pipe for covering and protecting a fluid pipe by covering an end portion of the fluid pipe exposed by contraction in the axial direction of the cladding pipe, etc. It is an object to provide a connection structure.

  The invention of claim 1 is exposed by an axial gap between a tip of a cladding tube formed of a foamed resin and into which a fluid pipe is inserted, and a heat insulating material in which a joint to which the fluid pipe is connected is accommodated. The fluid pipe to be covered is covered and protected from the heat insulating material to the covering tube, and is provided with a joint portion formed in a cylindrical body and joined to the heat insulating material so as not to move in the axial direction. And the said cladding tube is accommodated with the said fluid pipe | tube inside in the state which accept | permits the movement of the front-end | tip of the said cladding tube. That is, the exterior member is held at a fixed position with respect to the heat insulating material, while the cladding tube is relatively movable in the axial direction within the exterior member.

  Here, the joint part of the exterior member to the heat insulating material can be formed by, for example, a connecting adhesive tape that is applied across the outer surface of the exterior member and the outer surface of the heat insulating material.

  In the invention of claim 2 and claim 8, the exterior member is formed in a cylindrical body having an inner diameter larger than the outer diameter of the cladding tube, and the inner surface of the cylindrical body and the cladding tube are disposed on the end side opposite to the heat insulating material. A sealing portion is provided for sealing a radial gap between the outer surface of the first and second outer surfaces. This prevents the air in the gap between the inner surface of the exterior member and the outer surface of the cladding tube from communicating with the outside air.

  According to the invention of claim 3 and claim 9, the sealing portion of the exterior member is reduced in diameter toward the end opposite to the heat insulating material, and the tube is provided at a position corresponding to the tube diameter of the fluid tube and the cladding tube. It is formed so as to be cut in a direction perpendicular to the axis.

  The exterior member according to claim 4 includes a main body made of a cylindrical body and an auxiliary member fitted on an end portion of the cladding tube, and the auxiliary member is a shaft of the cladding tube accommodated inside the main body. It is externally fitted so as to be movable inside the main body along with the movement of the direction, and the outer surface abuts against the inner surface of the main body to seal the radial gap between the inner surface of the main body and the outer surface of the cladding tube. is there. Here, the main body of the exterior member is joined to the heat insulating material so as not to move in the axial direction. That is, the auxiliary member is movable relative to the main body. When the tip of the cladding tube moves in the axial direction, the auxiliary member follows the axis and moves in the axial direction. The auxiliary member is one of the constituent members of the exterior member, but can also be regarded as an auxiliary member that is a constituent member of the fluid pipe connection structure described later, and is substantially the same as this auxiliary member. belongs to.

  In the fifth and eleventh aspects of the invention, the main body has an inner diameter larger than the outer diameter of the maximum diameter of the cladding tube, and the auxiliary member has an outer diameter so as to cope with a plurality of types of cladding tubes having different diameters. It is formed of a winding tape that is adjusted to a winding amount equal to or larger than the inner diameter of the main body and wound on the outer surface of the end portion of the cladding tube.

  The exterior member of claim 6 is adapted to accommodate two types of cladding tubes having different diameters, the main body abuts the outer surface of the cladding tube having a large diameter, and the auxiliary member is externally fitted to the cladding tube having a small diameter. In this state, the outer surface is formed so as to contact the inner surface of the main body.

  The fluid pipe connection structure according to claim 7 includes a fluid pipe covered with a cladding pipe formed of a foamed resin, a joint to which the fluid pipe is connected, and a heat insulating material for housing the joint. The fluid pipe connected to the joint is drawn out from the outlet of the heat insulating material, and the fluid pipe exposed by the axial gap between the tip of the cladding tube and the heat insulating material is the heat insulating material. A cylindrical exterior member is provided that covers and protects from the covering tube to the covering tube. The exterior member is bonded to the heat insulating material so as not to move in the axial direction with respect to the heat insulating material, and allows the movement of the distal end of the cladding tube in the axial direction together with the fluid tube inside the covering material. It accommodates the tube.

  In a fluid pipe connection structure according to a tenth aspect, the exterior member includes a main body made of a cylindrical body, and an auxiliary body is externally fitted to the end of the cladding pipe. The auxiliary body is externally fitted so as to be movable inside the main body along with the axial movement of the cladding tube accommodated in the main body of the exterior member, and the outer surface abuts on the inner surface of the main body. A radial gap between the inner surface of the main body and the outer surface of the cladding tube is sealed. The auxiliary body is one of the constituent members of the fluid pipe connection structure, but may be an auxiliary member that is a constituent member of the exterior member.

  In the first and seventh aspects of the invention, since the exterior member that covers the fluid pipe from the heat insulating material to the cladding tube is provided, the connection of the fluid pipe to the joint requires a sufficient work allowance. After cutting the end, connecting the fluid pipe to the joint, pulling up the cladding pipe to the joint and storing the end in a heat insulating material, the sheath pipe shrinks in the axial direction, etc. Even if a gap in the axial direction is formed with the material, or a gap is formed from the beginning and the end portion of the fluid pipe is exposed, the exposed portion is covered and protected by heat by the exterior member.

  The exterior member is connected to the heat insulating material so as not to move in the axial direction. On the other hand, since the exterior member is provided to allow movement of the end portion due to axial contraction with respect to the cladding tube, it is pulled by the axial contraction of the cladding tube and can move in the same direction. Absent. Therefore, the exterior member does not separate from the heat insulating material and is always held at a constant exterior position, so that the exposed portion of the end portion of the fluid pipe can be reliably covered with the exterior member for heat insulation protection. On the other hand, since the cladding tube can move freely relative to the exterior member, its tip is prevented from moving due to contraction, so that stress concentrates on a specific part of the end and cracks or breaks in that part. Can be prevented.

  In the invention of claim 2 and claim 8, since the sealing portion prevents the air in the gap between the inner surface of the exterior member and the outer surface of the cladding tube from flowing in and out, the heat retaining effect by the exterior member. It is possible to prevent a decrease in the heat insulation effect.

  In the invention of claim 3 and claim 9, the end of the exterior member opposite to the heat insulating material is reduced in diameter toward the outside and cut in a direction perpendicular to the tube axis at a predetermined position of the end of the exterior member. Since it is possible, the clearance gap between the inner surface of an exterior member and the outer surface of a cladding tube can be easily sealed corresponding to the diameter of a fluid pipe and a cladding tube.

  According to the fourth and tenth aspects of the present invention, since an auxiliary body or auxiliary member whose outer surface abuts on the inner surface of the main body is provided at the end of the cladding tube, it is between the outer surface of the cladding tube and the inner surface of the exterior member. The gap is sealed by an auxiliary body or an auxiliary member. Therefore, the space at the end of the exposed fluid pipe communicates with the external space through the gap between the cladding pipe and the exterior member, and it is possible to prevent the heat insulation effect and the heat insulation effect from deteriorating due to the outside air flowing in and out. it can.

  In the fifth and eleventh aspects of the invention, since the auxiliary body and the auxiliary member are formed of the winding tape, the winding amount is adjusted so that the outer diameter is equal to or larger than the inner diameter of the exterior member, and the end portion of the cladding tube The outer surface of the auxiliary member and the auxiliary member is simply brought into contact with the inner surface of the exterior member with a simple configuration, and the gap between the outer surface of the cladding tube and the inner surface of the exterior member is sealed. be able to. Thus, similarly to the fourth and tenth aspects, the exposed space at the end of the fluid pipe communicates with the external space through the gap, thereby preventing the heat retaining effect and the heat insulating effect from being lowered. In addition, the winding amount can be adjusted so that the outer diameter is equal to or larger than the inner diameter of the exterior member, and the outer surface of the auxiliary body and the auxiliary member can be brought into close contact with the inner surface of the exterior member. Can be blocked. In addition, since the auxiliary body and the auxiliary member can be provided in a cladding tube having an arbitrary diameter, the gap can be sealed corresponding to a plurality of types of cladding tubes having different diameters.

  In the case of the large-diameter cladding tube, the main body includes an inner surface that contacts the outer surface of the large-diameter cladding tube, and the auxiliary member is formed so as to contact the inner surface of the main body. In the case of a small-diameter cladding tube, the inner surface of the body of the exterior member contacts the outer surface of the cladding tube. Therefore, the exterior member can be kept warm corresponding to two types of cladding tubes having different diameters.

It is a perspective view which shows the exterior member of 1st embodiment of this invention, and shows the state just before attaching to a heat insulating material. It is a horizontal sectional view of the exterior member and heat insulating material of FIG. (a) shows the heat insulating material of FIG. 2, (b) shows the joint and the heat insulating material, and (c) is a perspective view showing a state in which the joint is accommodated in the heat insulating material. 1A and 1B are perspective views, and FIG. 2B is a cross-sectional view taken along the line AA in FIG. It is sectional drawing which shows the state just before sticking the bonding adhesive tape of FIG. 1 to a heat insulating material. It is a perspective view which shows the state after attaching the exterior member of FIG. 1 to the heat insulating material. It is a horizontal sectional view of the exterior member and the heat insulating material of FIG. It is sectional drawing which shows another attachment aspect of an exterior member and a coupling. FIG. 4 is another heat insulating material of the first embodiment, (a) is a plan view showing a state immediately before housing the joint, and (b) is a horizontal sectional view showing a state after the exterior member is attached. It is sectional drawing which shows the state which attached the exterior member of FIG. 1 to the heat insulating material which accommodates another coupling. It is sectional drawing which shows the exterior member of 2nd embodiment of this invention. It is sectional drawing which shows the modification of the exterior member of 2nd embodiment. It is sectional drawing which shows another modification of the exterior member of 2nd embodiment. It is sectional drawing which shows the exterior member of 3rd embodiment of this invention. The modification of the exterior member of 3rd embodiment is shown, (a) is sectional drawing, (b) is sectional drawing by the BB cut line of (a). The other modification of the exterior member of 3rd embodiment is shown, (a) is sectional drawing, (b) is a perspective view of the auxiliary member in an exterior member.

<First embodiment>
First, a fluid pipe connection structure and an exterior member according to a first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1 to FIG. 4, the fluid pipe 21 is covered with a cladding tube 22 in order to keep heat and prevent condensation in the piping path of the fluid pipe 21. In addition, the joint disposed in the piping path is accommodated and protected by the heat insulating material 31. Furthermore, the exterior member 1 of the present invention is connected to the connection portion of the fluid pipe 21 to the joint. The fluid pipe 21, the cladding pipe 22, the joint, the heat insulating material 31, and the exterior member 1 constitute a fluid pipe connection structure. Hereinafter, each component will be described in detail.

  First, the fluid pipe 21 is used as a water supply pipe, a hot water supply pipe or the like, and a synthetic resin pipe such as cross-linked polyethylene or polybutene is used. The fluid pipe 21 is piped between a bathroom sink, a kitchen sink, a toilet, a water heater, and the like through a joint made of a metal material such as cheese, elbow, or header. The fluid pipe 21 is used as a hot water supply pipe or a water supply pipe, and is covered with a cladding tube 22 formed of a foamed resin on the outside in order to keep warm or prevent condensation. The fluid pipe 21 is connected to a joint provided in the piping path. In this embodiment, the cheese joint 23 is illustrated as a joint. The fluid pipe 21 is connected to the cheese joint 23 via a connection tool such as a tightening ring.

  A heat insulating material for housing the cheese joint 23 is shown in FIG. In FIG. 3, the heat insulating material 31 is formed by a pair of symmetrical half-divided bodies 32 and 33 as shown in FIGS. 3A and 3B, and can accommodate the entire cheese joint 23 inside. It has three outlets 34 that are formed in a size and from which the fluid pipe 21 connected to the cheese joint 23 is drawn. And the heat insulating material 31 is configured such that an opening 36 that can accommodate the joint 23 is formed therein by a continuous divided portion 35 that includes the outlet 34 and extends in the axial direction of the cheese joint 23. By closing the pair of half-divided bodies 32 and 33 around the hinge 37 provided at the center, the cheese joint 23 is accommodated inside as shown in FIG. The heat insulating material 31 is integrally formed of a heat insulating material having a predetermined thickness.

  In the exterior member 1, the cladding tube 22 is axially disposed between the tip of the cladding tube 22 into which the fluid tube 21 is inserted and the heat insulating material 31 in which the cheese joint 23 to which the fluid tube 21 is connected is accommodated. The end portion of the fluid pipe 21 that is exposed when the axial gap S is formed due to contraction or the like is covered from the heat insulating material 31 to the cladding pipe 22. The exterior member 1 has a main body 1a formed of a heat insulating material having a predetermined thickness, and is formed in a cylindrical body as shown in FIG. An opening 3 that can accommodate the fluid pipe 21 and the cladding pipe 22 is formed therein. The outer diameter of the exterior member 1 is formed such that the inner surface is in contact with the outer surface of the cladding tube 22, and the fluid tube 21 and the cladding tube 22 can be accommodated therein. Here, the inner surface of the exterior member 1 is only in contact with the outer surface of the cladding tube 22, and even if these surfaces are in close contact with each other, no large sliding resistance is generated on this boundary surface. Therefore, when the cladding tube 22 contracts in the axial direction, the distal end portion of the cladding tube 22 is allowed to move in the axial direction within the exterior member 1. The exterior member 1 has a length that can sufficiently cover the end of the fluid pipe 21 that is exposed when the cladding pipe 22 contracts in the axial direction.

  A closing adhesive tape 5 for closing the opening 3 is attached to the outer surface 4 of the tubular exterior member 1. As shown in FIG. 4, the closing adhesive tape 5 partially extends outward from the end portion of the outer surface 4 on one side with the divided portion 2 of the exterior member 1 as a boundary. A release paper 5a is provided on the sticking side surface of the protruding portion. The closing adhesive tape 5 is attached to reach the entire length of the divided portion 2 that forms the opening 3.

  And the exterior member 1 is bonded to the outer surface 4 of the end portion on the outlet 34 side of the heat insulating material 31 which is one end portion of the cylindrical body, and the connecting adhesive tape 6 to be bonded to the heat insulating material 31 is adhered. Yes. Furthermore, a release paper 6 a is provided on the surface of the connecting adhesive tape 6 that extends outward from the end of the exterior member 1 on the outlet 34 side and is attached to the heat insulating material 31. It has been. Further, the connecting adhesive tape 6 has an outwardly extending portion formed into a plurality of adhesive pieces 6b by an axial linear cut, that is, in a strip shape. And the exterior member 1 is connected through the connecting adhesive tape 6 in such a manner that the end surface 7 at one end of the main body 1 a is in contact with the end surface 34 a of the outlet 34 of the heat insulating material 31. Thereby, the exterior member 1 is joined to the heat insulating material 31 so as not to move in the axial direction, and is held at a fixed position.

  Further, the closing adhesive tape 5 and the connecting adhesive tape 6 are composed of a single adhesive sheet material as a whole. In addition, the sticking sheet material is stuck so as to cover substantially the entire outer surface 4 of the exterior member 1.

Next, a method of connecting the fluid pipe 21 to the cheese joint 23 configured as described above and protecting the connection end of the cheese joint 23 and the fluid pipe 21 with the heat insulating material 31 will be described.
First, in order to connect the fluid pipe 21 to the cheese joint 23, when using a short circular clamping ring as a connection tool, the end of the fluid pipe 21 is removed by cutting off the end of the cladding tube 22. A predetermined length is exposed from the tip of the cladding tube 22, and a fastening ring as a connector 24 is externally fitted to the fluid pipe 21, and this is retracted to a position separated from the tip by a predetermined length at the end of the fluid pipe 21. Let me. Accordingly, the diameter of the tip of the fluid pipe 21 is expanded using a diameter expanding tool or the like, and then fitted into the outer surface of the connecting pipe portion of the cheese joint 23, and then the clamping ring is pushed up using a pinching tool such as a slider. Then, the fluid pipe 21 is press-fitted into the outer surface, and the end of the fluid pipe 21 is clamped from both the inner and outer surfaces by the connecting pipe portion and the fastening ring of the cheese joint 23. As a result, the fluid pipe 21 is connected to the cheese joint 23.

  When the fluid pipe 21 is connected to the cheese joint 23, the heat insulating material 31 is attached to the cheese joint 23. First, the pair of half-divided bodies 32 and 33 are opened with the hinge 37 of the heat insulating material 31 as an axis, and the cheese joint 23 to which the fluid pipe 21 is connected from the opening 36 formed by the divided portion 35 is accommodated. Thereafter, the cladding tube 22 is forcibly extended in the axial direction, and the end portion thereof is pulled up to the cheese joint 23 side and inserted into the outlet 34 to cover the exposed end portion of the fluid tube 21. Next, the end portions of the fluid pipe 21 and the cladding pipe 22 are held at the outlet 34 by closing the pair of half-divided bodies 32 and 33 and clamping them from both sides. Thereby, the edge part of the cheese joint 23, the connection tool 24, the fluid pipe | tube 21, and the cladding tube 22 is integrally covered with the heat insulating material 31, and heat insulation and protection are carried out.

Next, attachment of the exterior member 1 will be described.
As described above, the exterior member 1 is attached to the fluid that is exposed when the axial gap S shown in FIG. 7 or the like is formed between the tip of the cladding tube 22 and the heat insulating material 31 of the cheese joint 23. This is to cover the end of the tube 21. In other words, since the cladding tube 22 is formed of a foamed resin, when hot water flows through the fluid tube 21, the heat shrinks in the axial direction. In addition, since the cladding tube 22 covers the end of the fluid tube 21 that is exposed by cutting off the end of the cladding tube 22 for connection after connecting the fluid tube 21 to the cheese joint 23, the axial direction Since the end portion is pulled up to the joint 23 side, a residual stress due to the tension is generated, and after the fluid pipe 21 is connected, it gradually contracts in the axial direction by the restoring force as time passes. In addition, the cladding tube 22 is subjected to a tensile force in the axial direction in winding up to a roll at the time of molding, and residual stress is generated after molding, so if it is unwound from the roll and connected to the cheese joint 23 Similarly, it gradually contracts in the axial direction due to the restoring force. Since the cladding tube 22 is usually laid on the floor or the like for a long distance, the tip portion contracts to a considerable length.

  On the other hand, since the end portion of the cladding tube 22 is held only by the pinching pressure in the split portion 35 of the pair of half-divided bodies 32 and 33 at the outlet 34 of the heat insulating material 31, there is the above-described axial contraction. The heat retaining material 31 overcomes the holding force of the outlet 34 and moves in the opposite direction to the heat retaining material 31, so that it escapes from the heat retaining material 31. As a result, the end of the fluid pipe 21 has a gap in the length from the outlet 34 of the heat insulating material 31 to the tip of the cladding tube 22. Further, an axial gap between the tip of the cladding tube and the heat insulating material of the joint may be generated when the cladding tube is installed. If the covering tube 22 is not covered by the gaps due to these, the heat retaining property is lowered, and the appearance of the portion is also impaired. For this reason, the exposed portion at the end of the fluid pipe 21 is covered with the exterior member 1.

  Therefore, in order to attach the exterior member 1, first, the outer surface 4 on both sides of the divided portion 2 along the axial direction is expanded in the circumferential direction to form the opening 3, and the fluid pipe 21 and the cladding pipe are formed from the opening 3. 22 is accommodated in the exterior member 1. Next, the release paper 5a of the closing adhesive tape 5 is peeled off, and the opening 3 is closed, and the extended portion of the closing adhesive tape 5 is attached to the other outer surface 4 facing the entire length of the divided portion 35. To do. Thereby, the exterior member 1 is formed in the closed cylindrical body. Here, since the closing adhesive tape 5 is attached to reach the entire length of the divided portion 35, the entire opening can be reliably closed without a gap.

  Next, as shown by the arrows in FIGS. 1 and 2, the exterior member 1 is moved to the heat insulating material 31 side along the axial direction, and is provided at a portion extending outward of the connecting adhesive tape 6. The peeled release paper 6a is peeled off, and the end surface 7 of the exterior member 1 is extended to the end surface 34a of the outlet 34 on the heat insulating material 31 side in a state where the tips of the plurality of sticking pieces 6b of the connecting sticking tape 6 are radially expanded. Abut. At this time, although the inner surface of the exterior member 1 is in contact with the outer surface of the cladding tube 22, the relative movement between the two is not restricted. Can be moved. Here, since the end surface 7 of the end portion of the exterior member 1 and the end surface 34a of the heat insulating material 31 are joined in a face-to-face state, both can be connected without a gap, and the end portion of the exposed fluid pipe 21 can be securely connected. Can be covered. Moreover, since it is in an interview state, both can be easily joined and can be joined in a stable state. The release paper 6a may be peeled after the exterior member 1 is moved to the heat insulating material 31 side.

  Next, the connecting adhesive tape 6 is attached to the outer surface of the outlet 34 of the heat insulating material 31. At this time, since the connecting sticking tape 6 is formed with a plurality of sticking pieces 6b extending outwardly, as shown in FIG. 5, the tips of the sticking pieces 6b are outward. After the end surfaces of the exterior member 1 and the heat insulating material 31 are brought into contact with each other in a state where the heat insulating material 1 is spread, the respective adhesive pieces 6b can be brought down on the outer surface of the heat insulating material 31 and adhered. Following the shape, the entire surface of the sticking piece 6b can be stuck reliably and with good finish, and the sticking work can be easily performed.

  Thereby, the attachment to the heat insulating material 31 of the exterior member 1 is completed, and the state after completion of the attachment of the exterior member 1 is shown in FIGS. In addition, in sticking of the connecting adhesive tape 6, as shown as a representative of the right joint in FIG. 6, the connecting adhesive tape that is attached to the outer surface of the heat insulating material 31 around the joint. It is desirable that another decorative tape 8 is wound around and adhered to the outer surface of the plurality of adhesive pieces 6b. In this case, since the decorative tape 8 is stuck and stuck on the outer surface across the plurality of sticking pieces 6b, the sealing performance is improved. Further, the bonding force between the exterior member 1 and the heat insulating material 31 is further enhanced. Furthermore, the pasted part becomes a more beautiful finish.

  After the attachment of the exterior member 1 is completed, the end portion of the fluid pipe 21 exposed by the contraction in the axial direction of the cladding tube 22 after the connection is integrally covered with the exterior member 1 to be kept warm. In FIG. 7, the connecting adhesive tape 6 is attached with a step between the exterior member 1 and the heat insulating material 31, but as shown in FIG. 10 described later, When the diameter is the same as the outer diameter of the outlet 34 of the heat insulating material 31, it is stuck in a flush state without producing a step, and the sealing performance between the exterior member 1 and the heat insulating material 31 is improved. . In addition, the appearance can be improved and the attaching operation can be performed more smoothly.

Next, the operation of the fluid pipe connection structure and the exterior member of the first embodiment will be described.
The exterior member 1 covers the end of the fluid pipe 21 from the heat insulating material 31 to the cladding tube 22. Therefore, in connection of the fluid pipe 21 to the cheese joint 23, the end portion of the cladding tube 22 is cut out so as to secure a sufficient work allowance, and after the fluid pipe 21 is connected to the cheese joint 23, the cladding pipe 22 is connected to the cheese joint 23. 23, and the end thereof is accommodated in the heat insulating material 31, and then the axial clearance of the cladding tube 22 is formed between the distal end of the cladding tube 22 and the heat insulating material 31 due to the axial contraction of the cladding tube 22, and the fluid tube 21. Even if the end portion of the fluid pipe 21 is exposed, the exposed portion can be covered with the exterior member 1, so that the end portion of the fluid pipe 21 is reliably kept warm.

  The exterior member 1 is connected to the heat insulating material 31 so as not to move in the axial direction. On the other hand, since the exterior member 1 is provided to allow movement of the end portion due to axial contraction with respect to the cladding tube 22, it is pulled by the axial contraction of the cladding tube 22 and moves in the same direction. There is nothing. Therefore, the exterior member 1 is not separated from the heat insulating material 31 and is always held at a constant exterior position. Therefore, the exposed portion of the end of the fluid pipe 21 can be reliably covered with the exterior member 1 for heat insulation protection. it can. On the other hand, since the cladding tube 22 can move freely relative to the exterior member 1, the end portion is prevented from moving due to contraction, and stress concentrates on a specific portion such as the end portion, and the portion cracks. And tearing is prevented.

  Further, even if the cladding tube 22 contracts to produce an axial gap S, the gap S is covered with the exterior member 1 and is not visually recognized from the outside, so that the appearance of this portion is prevented from being deteriorated.

  By the way, in the said embodiment, although the connection adhesive tape 6 is extended outward from the front-end | tip of the one end part of the exterior member 1, it is not restricted to this, It is an axial direction from the front-end | tip of the exterior member 1. It is also possible to extend from a position retracted by a predetermined distance. As shown in FIG. 8, the connecting adhesive tape 6 is applied when the end of the exterior member 1 is attached to the heat insulating material 31 in a state of being inserted into the outlet 34 of the heat insulating material 31. In this case, the release paper 6 a is attached to the back side of the portion extending toward the heat insulating material 31 from a position retracted by a predetermined distance in the axial direction from the front end of the exterior member 1.

  Moreover, when the cheese joint 23 is accommodated in the heat insulating material 31 with the end portion of the fluid pipe 21 and the connector 24 exposed, as shown in FIG. As shown in the central connection part of FIG. 9B, the end surface 7 of one end is attached in a state of being in contact with the end surface 34 a of the outlet 34 of the heat insulating material 31, and the fluid pipe 21 including the connection tool 24 is attached. The ends are integrally covered with the exterior member 1. At this time, the connecting adhesive tape 6 is attached in a state of being bent at right angles to the outer surface of the heat insulating material 31, but since it is formed of a plurality of adhesive pieces 6b, the heat insulating material is entirely covered without any particular trouble. 31 can be attached to the outer surface.

  Furthermore, in the said embodiment, although the cheese coupling 23 was illustrated as a coupling protected by the thermal insulation material 31, when the coupling is an elbow coupling, the exterior member 1 can be similarly attached. In FIG. 10, the state which attached the exterior member 1 to the heat insulating material 31 which accommodates the elbow joint 25 is shown.

<Second embodiment>
Next, the fluid pipe connection structure and the exterior member according to the second embodiment will be described with reference to FIGS. In the first embodiment, the inner surface of the exterior member 1 and the outer surface of the cladding tube 22 are in contact with each other, that is, the inner diameter of the exterior member 1 and the outer diameter of the cladding tube 22 are the same. In the form, the outer diameter of the exterior member 1 is larger than the outer diameter of the cladding tube 22.

  In FIG. 11, the exterior member 1 is formed in a cylindrical body in which the main body 1 a has an inner diameter larger than the outer diameter of the cladding tube 22. Further, the exterior member 1 is provided with a sealing portion 9 that seals the radial gap T between the inner surface of the main body 1 a and the outer surface of the cladding tube 22 on the end side opposite to the heat insulating material 31. . The sealing part 9 has an annular plate shape with a constant width, and is integrally provided inwardly on the end side opposite to the heat insulating material 31 in the main body 1a. The inner diameter of the sealing portion 9 is formed substantially the same as the outer diameter of the cladding tube 22, and the inner surface is in contact with the outer surface of the cladding tube 22.

The exterior member 1 of the second embodiment can be attached corresponding to the fluid pipe 21 and the cladding pipe 22 having two types of diameters.
That is, first, as shown in FIG. 11A, when the fluid pipe 21 and the cladding tube 22 have a small diameter, the exterior member 1 has the inner surface of the sealing portion 9 in contact with the outer surface of the cladding tube 22. Thereby, the radial gap T between the inner surface of the main body 1a and the outer surface of the cladding tube 22 is sealed at the end opposite to the heat insulating material 31, and the heat insulating material 31 generated by contraction after the gap T and the connection. The space in the axial gap S with the tip of the cladding tube 22 is disconnected from the outside on the end opposite to the heat insulating material 31, and the air in the gap S and the gap T is the end opposite to the heat insulating material 31. Inflow and outflow through the end opening on the part side is prevented. As a result, the exposed end portion of the fluid pipe 21 is surely covered by the exterior member 1 and is kept warm. Therefore, it can be said that the sealing portion 9 functions as a kind of lid portion that closes the end opening of the gap T.

  Next, as shown in FIG. 11 (b), when the cladding tube 22 has a large diameter and the outer diameter is the same as the inner diameter of the exterior member 1, the exterior member 1 in FIG. A cutting line C indicated by a chain line is cut in a direction perpendicular to the central axis, that is, the tube axis, and the sealing portion 9 is removed. If the exterior member 1 with a part of the sealing portion 9 removed is attached, the inner surface of the exterior member 1 comes into contact with the outer surface of the cladding tube 22 as shown in FIG. As a result, the end portion of the fluid pipe 21 exposed by the axial gap S generated by the contraction of the cladding tube 22 after the connection is similarly reliably covered with the exterior member 1 and is kept warm.

  Thus, since this exterior member 1 can be attached corresponding to the fluid pipe 21 and the cladding pipe 22 having two types of large and small diameters, the member cost can be reduced, and transportation and storage management are facilitated.

Next, a modification of the second embodiment is shown.
In FIG. 12A, the exterior member 1 has a diameter of the sealing portion 9 that gradually decreases toward the end opposite to the heat insulating material 31, and at a position corresponding to the diameters of the fluid pipe 21 and the cladding pipe 22. It is formed so that it can be cut. Specifically, the inner diameter of the exterior member 1 is formed to be the same as the outer diameter of the maximum diameter cladding tube 22 among the cladding tubes 22 having four different sizes. Of the sealing portions 9, the first sealing portion 9a having the largest inner diameter is in contact with the outer surface of the cladding tube 22 having the second largest outer diameter, and the second sealing portion 9b having an intermediate inner diameter is The third sealing portion 9c having the smallest inner diameter is in contact with the outer surface of the cladding tube 22 having the smallest outer diameter, and is in contact with the outer surface of the cladding tube 22 having the third largest outer diameter.

  Therefore, the exterior member 1 can be attached corresponding to the cladding tube 22 having four types of outer diameters. For example, in the case of the cladding tube 22 having the third largest outer diameter, the exterior member 1 in FIG. The member 1 is cut in a direction orthogonal to the central axis along a cutting line D indicated by a one-dot chain line, and the third sealing portion 9c is removed. When the exterior member 1 is attached, the inner surface of the second sealing portion 9b comes into contact with the outer surface of the cladding tube 22 as shown in FIG. As a result, the end portion of the fluid pipe 21 that is exposed when the axial gap S is generated after the connection is similarly reliably covered with the exterior member 1 and is kept warm.

Next, another modification of the second embodiment is shown.
In FIG. 13 (a), the exterior member 1 has the sealing portion 9 continuously tapered toward the end opposite to the heat insulating material 31, and the diameter thereof is reduced. It is formed so as to be cut at a corresponding position. Specifically, the end portion of the exterior member 1 opposite to the heat insulating material 31 is integrally provided with a sealing portion 10 formed in a hollow truncated cone shape, and the tip portion of the sealing portion 10 is covered. An end opening through which the tube 22 passes is formed. The inner surface of the end opening of the sealing portion 10 is formed in a size that comes into contact with the outer surface of the smallest diameter cladding tube 22, and the inner surface is enlarged in diameter toward the heat insulating material 31 side.

  Therefore, the exterior member 1 can be attached to the cladding tube 22 having different outer diameters in a stepless manner. For example, in the case of the cladding tube 22 having a medium outer diameter shown in FIG. 13B, in FIG. 13A, the exterior member 1 is cut in a direction orthogonal to the central axis along a cutting line E indicated by a one-dot chain line. Remove the tip side part. When the exterior member 1 is attached, the inner surface of the sealing portion 10 comes into contact with the outer surface of the cladding tube 22 as shown in FIG. Thereby, the end portion of the fluid pipe 21 exposed after the connection is similarly reliably covered with the exterior member 1 and is kept warm.

  In addition, although the sealing parts 9 and 10 of 2nd embodiment are integrally formed in the exterior member 1, it forms as a cyclic | annular board | plate material independent of the main body 1a, etc., and this is formed in the main body 1a of the exterior member 1. It is good also as what was joined and integrated by means, such as adhesion | attachment and tape sticking. In this case, the separate sealing portions 9 and 10 may be made of the same material as the main body 1a or may be made of a different material.

  In addition, when the inner surfaces of the sealing portions 9 and 10 of the exterior member 1 are strongly pressed against the outer surface of the cladding tube 22, a large frictional force and sliding resistance are generated between both surfaces, and the end portion of the cladding tube 22 is moved. Therefore, the moving length when the cladding tube 22 contracts in the axial direction becomes small. As a result, the exposed length at the end of the fluid pipe 21 is shortened, and the decrease in heat retention due to the exposure is slightly reduced.

<Third embodiment>
Next, the fluid pipe connection structure and the exterior member according to the third embodiment will be described with reference to FIGS. 3rd embodiment shows the thing with the internal diameter of the exterior member 1 larger than the outer diameter of a cladding tube similarly to 2nd embodiment. However, in the second embodiment, the sealing portions 9 and 10 are integrated with the main body 1a of the exterior member 1, whereas in the third embodiment, the auxiliary member used here is the main body of the exterior member 1. It is separated from 1a and is movable relative to the main body 1a.

  In FIG. 14, the exterior member 1 is formed in a cylindrical body in which the main body 1 a has an inner diameter larger than the outer diameter of the cladding tube 22. In addition, the auxiliary member 11 is fitted on the end of the cladding tube 22. The auxiliary member 11 constitutes the exterior member 1 together with the main body 1a, and is formed of a ring plate 12 having a constant thickness made of a heat insulating material and formed into an annular plate shape. The ring plate 12 is externally fitted to the end portion along the axial direction from the tip of the cladding tube 22. The ring plate 12 seals the radial gap T between the inner surface of the main body 1 a and the outer surface of the cladding tube 22. The inner diameter of the auxiliary member 11 is formed to be the same as or slightly smaller than the outer diameter of the cladding tube 22, and the inner surface is in contact with the outer surface of the cladding tube 22. The outer diameter of the auxiliary member 11 is the same as the inner diameter of the main body 1a, and the outer surface is in contact with the inner surface of the main body 1a.

  However, the auxiliary member 11 is movable in the axial direction along with the contraction movement with respect to the cladding tube 22, and relative to the main body 1 a of the exterior member 1 joined to the heat insulating material 31. In addition, movement in the axial direction is allowed. Here, the movement of the auxiliary member 11 following the contraction movement of the cladding tube 22 is performed when the inner diameter of the auxiliary member 11 is the same as the outer diameter of the cladding tube 22, and the inner surface of the auxiliary member 11 is bonded with an adhesive tape or an adhesive. This can be achieved by joining to the outer surface of the cladding tube 22 by means such as adhesion. When the inner diameter of the auxiliary member 11 is slightly smaller than the outer diameter of the cladding tube 22, frictional force and sliding resistance are generated between the inner surface of the auxiliary member 11 and the outer surface of the cladding tube 22, or the auxiliary member 11. This is possible because the inner surface of the tube is strongly pressed against the outer surface of the cladding tube 22 and slightly bites into it. In this manner, since the auxiliary member 11 moves following the contraction movement of the cladding tube 22 in this way, in the third embodiment, the auxiliary member 11 is externally fitted at a position near the tip at the end of the cladding tube 22. Is done.

  Here, when the auxiliary member 11 moves together with the cladding tube 22 due to frictional force and sliding resistance generated between the inner surface and the outer surface of the cladding tube 22, the frictional force and the like is the inner diameter of the auxiliary member 11. Further, it varies depending on the material, hardness, surface roughness of the inner surface of the auxiliary member 11 that contacts the outer surface of the cladding tube 22, and the like. The same applies to the sliding resistance generated between the outer surface of the auxiliary member 11 and the inner surface of the main body 1a. On the other hand, if the sliding resistance between the outer surface of the auxiliary member 11 and the main body 1a is large and the frictional force and sliding resistance generated between the inner surface of the auxiliary member 11 and the outer surface of the cladding tube 22 are small, the coating is caused by contraction. Even if the tube 22 moves in the opposite direction to the heat insulating material 31, the auxiliary member 11 may not move together with the cladding tube 22, and the auxiliary member 11 may come off the tip of the cladding tube 11. Therefore, the auxiliary member 11 needs to be molded in consideration of its inner diameter, surface roughness, material, hardness, and the like.

Since the exterior member 1 of the third embodiment includes the auxiliary member 11, the exterior member 1 can be attached to the fluid pipe 21 and the cladding pipe 22 having two types of diameters.
First, as shown in FIG. 14, when the fluid pipe 21 and the cladding tube 22 have a small diameter, the exterior member 1 has the inner surface of the auxiliary member 11 in contact with the outer surface of the cladding tube 22, and the outer surface is the inner surface of the main body 1a. Abut. As a result, the space around the axial gap S between the heat insulating material 31 and the tip of the cladding tube 22 generated by the contraction of the cladding tube 22 after the connection of the fluid tube 21 passes through the clearance T at the location where the auxiliary member 11 is fitted. Communication to the outside is blocked, and air around the gap S is prevented from flowing in and out through the gap opening opposite to the heat insulating material 31. As a result, the exposed end portion of the fluid pipe 21 is surely covered by the exterior member 1 and is kept warm.

  Next, when the cladding tube 22 has a large diameter and the outer diameter is the same as the inner diameter of the main body 1 a of the exterior member 1, the exterior member 11 is attached without the auxiliary member 11 being fitted on the cladding tube 22. Then, as described above with reference to FIG. 11 (b), the inner surface of the main body 1 a of the exterior member 1 contacts the outer surface of the cladding tube 22. As a result, the end of the fluid pipe 21 exposed when the gap S is generated after the connection is similarly reliably covered by the exterior member 1 and is kept warm.

  In this way, the exterior member 1 uses the auxiliary member 11 for the main body 1a, so that the main body 1a uses the same body, and the auxiliary member 11 is a fluid having two kinds of large and small diameters only by selecting attachment. Since it can attach corresponding to the pipe | tube 21 and the cladding tube 22, like the exterior member 11 of 2nd embodiment shown in FIG. 11, member cost can be reduced and conveyance and storage management become easy.

  The auxiliary member 11 is one of the constituent members of the exterior member 1 together with the main body 1a. However, in the fluid pipe connection structure, the auxiliary member 11 can be regarded as an auxiliary body that is a constituent member, and is substantially a fluid. It is the same as the auxiliary body of the pipe connection structure.

By the way, the auxiliary member 11 is externally fitted to the cladding tube 22 to prevent outside air from flowing into and out of the exposed end of the fluid tube 21 through the gap T, and reducing the heat retention effect. There is also an effect that the bonding state between the exterior member 1 and the heat insulating material 31 by the connecting adhesive tape 6 is more stably maintained. That is, when the outer surface 4 of the exterior member 1 receives some pressing force from the outside at the end of the fluid pipe 21 when or after the exterior member 1 is joined to the heat insulating material 31, the outer surfaces of the exterior member 1 and the cladding tube 22. If the gap T is generated between the outer surface 4 and the outer surface 4 of the exterior member 1 may sink into the gap T. Then, the connecting adhesive tape 6 is easily peeled off from the outer surface 4 of the exterior member 1 by being pulled by the sinking of the outer surface 4 of the exterior member 1. However, as shown in FIG. 14, if the auxiliary member 11 is interposed in the gap T, even if some external force is applied, the pressing force by the auxiliary member 11 is supported by the auxiliary member 11. Is prevented from sinking into the gap T. Therefore, as described above, the effect that the joint state between the exterior member 1 and the heat insulating material 31 can be more stably maintained can be obtained.
In addition, when the auxiliary member 11 is provided, an effect that it is easy to perform the operation of adhering the connecting adhesive tape 6 is also obtained.

Next, a modification of the third embodiment is shown.
In FIG. 15, the main body 1 a of the exterior member 1 has an inner diameter larger than that of the maximum diameter among a plurality of types of cladding tubes 22 having different diameters. On the other hand, the auxiliary member 11 is formed of a winding tape 13 having a certain thickness and having a heat insulating effect. The winding tape 13 can move in the opposite direction to the heat insulating material 31 with respect to the main body 1a of the exterior member 1 and can move in the opposite direction to the heat insulating material 31 along with the contraction movement of the cladding tube 22. .

  To attach the exterior member 11 using the auxiliary member 11, as shown in FIG. 15, the winding tape 13 as the auxiliary member 11 is wound around the outer surface of the end portion of the cladding tube 22, and the winding tape is used. When the outermost diameter of 13 becomes equal to or larger than the inner diameter of the main body 1a, the winding is stopped and the winding tape 13 is cut. That is, the winding tape 13 is wound around the outer surface of the end portion of the cladding tube 22 by adjusting the winding amount so that the outer diameter is equal to or larger than the inner diameter of the main body 1a. Thereafter, the main body 1 a is attached from the outside of the winding tape 13. When the winding tape 13 is attached, the inner and outer surfaces thereof are in pressure contact with the outer surface of the cladding tube 22 and the inner surface of the main body 1 a of the exterior member 1. Thereby, the edge part of the fluid pipe | tube 21 exposed after a connection is covered with the exterior member 1, and heat insulation protection is carried out.

  The exterior member 1 can be attached to a plurality of types of cladding tubes 22 having different outer diameters in a stepless manner.

Next, another modification of the third embodiment is shown.
In FIG. 16A, the main body 1 a of the exterior member 1 has an inner diameter larger than that of the cladding tube 22. On the other hand, the auxiliary member 11 is formed of a pair of halved pipes 14 and 14 having a heat insulating effect. As shown in FIG. 16 (b), the half-circular tube body 14 has a direction perpendicular to the outer surface of the half-circular tube portion 14a, that is, at both ends of the half-circular tube portion 14a formed in a half-circular tube shape. A flange 14b bent in a direction toward the tube axis is provided so as to project along an arc on the outer surface of the half-circular tube portion 14a. The front end of the flange 14b has a semicircular shape, and the front end surface 14c abuts on the outer surface of the cladding tube 22. The pair of half-circular tube bodies 14 and 14 are closed so that the half-surfaces 14d come into contact with each other and are formed in a circular tube shape. The outer diameter of the auxiliary member 11 formed in a circular tube shape is the same as the inner diameter of the main body 1 a of the exterior member 1. Further, the radius of the front end surface 14c of the flange 14b is formed to be the same as or slightly smaller than the radius of the cladding tube 22.

 In order to attach the exterior member 11 using the auxiliary member 11 composed of the pair of half-circular tube bodies 14, 14, both outer sides are formed on the outer surface of the end portion of the cladding tube 22 as shown in FIG. A pair of half-circular tube bodies 14 and 14 are applied to sandwich the cladding tube 22. Thereby, now, when the radius of the front end surface 14 c of the flange 14 b of the half-circular tube body 14 is the same as the radius of the cladding tube 22, the front end surface 14 c of the flange 14 b comes into contact with the outer surface of the cladding tube 22. Further, when the radius of the front end surface 14c of the flange 14b is slightly smaller than the radius of the cladding tube 22, the front end surface 14c of the flange 14b bites into or sticks to the outer surface of the cladding tube 22, or the cladding tube 22 is slightly touched. It will be clamped in a deformed state. On the other hand, the outer surface of the half tube 14 contacts the inner surface of the main body 1 a of the exterior member 1. FIG. 16A shows a state in which the front end surface 14c of the flange 14b bites into the outer surface of the cladding tube 22.

  In this way, when the cladding tube 22 is sandwiched between the pair of half-circular tube bodies 14, 14, a winding tape is wound around the outer surface of the half-circular tube body 14 and held. Thereafter, the main body 1 a is attached from the outside of the half-circular tube body 14. Thereby, the edge part of the fluid pipe | tube 21 exposed after a connection is covered with the exterior member 1, and heat insulation protection is carried out. In addition, after the exterior member 1 is attached, the space between each inner surface of the half-circular tube portions 14a, 14a of the pair of half-circular tube bodies 14, 14 and the outer surface of the cladding tube 22 forms an air insulation layer. To do.

  Even if the half-circular tube body 14 has a certain size, the exterior member 1 has a pair of half-circular tube bodies 14, 14 that are inserted into the outer surface of the cladding tube 22 by the tip surface 14 c of the flange 14 b. Since it can be assembled and formed into a circular tubular shape, it can be attached to a plurality of types of cladding tubes 22 having different diameters.

<Others>
By the way, the main body 1a of the exterior member 1 of each of the embodiments described above has an opening 3 formed by a continuous divided portion 2 extending in the axial direction, and is closed to a cylindrical body by using a closing adhesive tape 5. In the case of carrying out the present invention, the main body 1a is not limited to this. For example, a winding tape (not shown) is used to wrap the main body 1a in the circumferential direction of the outer surface 4 of the exterior member 1. It is also possible to close the opening 3 by winding it to form a cylindrical body. Alternatively, a pair of separated half cylinders may be assembled to form a cylindrical body. Or it is good also as a structure which does not use these tapes but closes the opening 3 by an own return force, or closes the opening 3 by engagement. Furthermore, it may be formed into a cylindrical body from the beginning without being separated. The exterior member 1 formed into a cylindrical body from the beginning is attached by being extrapolated from the distal ends of the fluid tube 21 and the cladding tube 22.

  In addition, the exterior member 1 cuts off the end of the cladding tube 22 for connecting the fluid tube 21, or the cladding tube 22 contracts due to residual stress or the like. It may be attached when the end portion of the cladding tube 22 is separated from the outlet 34 of the heat insulating material 31 to the outside by being housed in the outlet 34 and not being held under pressure. Further, it may be attached when the end of the cladding tube 22 is housed inside the outlet 34 of the heat insulating material 31.

  In each of the above embodiments, the exterior member 1 may be attached when the fluid pipe 21 is connected to the joint, or the tip of the cladding tube 22 is separated from the heat insulating material 31 after the fluid pipe 21 is connected to the joint. It may be attached after the end of the fluid pipe 21 is exposed, and the attachment time of the exterior member 1 is not particularly limited.

In addition, in the above embodiment, the exterior member 1 has an inner surface in contact with the outer surface of the cladding tube 22. Here, the exterior member 1 may be in pressure contact with the cladding tube 22 or may be in elastic contact with the inner surface of the exterior member 1 or the outer surface of the cladding tube 22 recessed. The “contact” includes such pressure contact and elastic contact.
Further, with respect to the auxiliary member 11, “contact” with the inner surface of the exterior member 1 also includes pressure contact and elastic contact.

  Next, in the bonding adhesive tape 6 of each of the above embodiments, a plurality of adhesive pieces 6b are formed by linear cuts in a portion extending outward, and adjacent adhesive pieces 6b and It is good also as what was arranged in parallel at intervals. If the sticking pieces 6b are arranged side by side in this manner, the heat insulating material 31 is placed between the sticking pieces 6b in a state where the connecting sticking tape 6 is stuck to the outer surface of the heat insulating material 31. You can face the outside. Therefore, as described above, the decorative tape 8 can be connected by winding another decorative tape 8 on the outer surface of the plurality of adhesive pieces 6b of the connecting adhesive tape 6 and attaching them. While being affixed on the outer surface of the affixing tape 6, it is affixed directly to the outer surface of the heat insulating material 31 through the gaps between the affixing pieces 6b. As a result, the exterior member 1 and the heat insulating material 31 can be more firmly connected and joined.

  Moreover, since the adhesive tape 5 for closure of each said embodiment is formed with the adhesive sheet material of 1 sheet, and covers the substantially whole outer surface 4 of the exterior member 1, the division | segmentation part 2 of the outer surface 4 of one side The portion extending from the end of the divided portion 2 is stuck in an overlapped state on the outer surface 4 on the other side facing the divided portion 2, but the end of the divided portion 2 on the outer surface 4 on the other side of the divided portion 2 In the range which is spaced apart in the circumferential direction by a predetermined length, the closing adhesive tape 5 may not be applied. In this case, the outwardly extending portion of the closing adhesive tape 5 is attached to the closing adhesive tape 5 that is previously attached to the outer surface 4 on the other side of the exterior member 1 in an overlapping state. Instead, it is directly attached to the outer surface 4 on the other side. Therefore, the bonding strength of the closing adhesive tape 5 is increased, and the closed state can be further strengthened.

  In addition, the closing adhesive tape 5 and the connecting adhesive tape 6 of each of the embodiments described above are formed of a single adhesive sheet, but the closing adhesive tape 5 and the connecting adhesive tape. It may be formed separately from the tape 6. Thereby, for example, the surface of the closing adhesive tape 5 can be the same color as the cladding tube 22, and the surface of the connecting adhesive tape 6 can be the same color as the heat insulating material 31. In this way, for example, the cladding tube 22 covers the water supply pipe as the fluid pipe 21 and is formed of a blue material correspondingly, or the cladding pipe 22 covers the hot water supply pipe as the fluid pipe 21. If the end portion of the cladding tube 22 is covered with the exterior member 1 or other member when it is formed of a red material correspondingly, the material color of the cladding tube 22 cannot be visually confirmed from the outside. However, by visually observing the surface color of the closing adhesive tape 5 that is attached to the outer surface of the exterior member 1, the material color of the cladding tube 22 that cannot be visually recognized from the outside, and thus inserted into the cladding tube 22. The type of the fluid pipe 21 can be confirmed immediately.

  Then, the closing adhesive tape 5 and the connecting adhesive tape 6 of each of the above embodiments are integrally attached so as to cover substantially the entire outer surface 4 of the exterior member 1, but FIG. 4 (c). As shown in FIG. 3, the outer member 4 may be attached only to a part of the outer surface 4.

  In addition, each end surface of the connecting portion between the exterior member 1 and the heat insulating material 31 is formed as one vertical surface, but is formed on a stepped surface, and the two members are connected by fitting or engaging with each other. It may be a thing. In this case, a more stable connected state can be obtained, and the closeness between both members can be increased.

  In the first embodiment, the opening 3 is closed and the closing adhesive tape 5 is attached to form the exterior member 1 into a cylindrical body, and then the connecting adhesive tape 6 is used to attach the exterior member 1. Is connected to the heat insulating material 31, but conversely, the exterior member 1 is first connected to the heat insulating material 31 with the connecting adhesive tape 6, and then the opening 3 is closed using the closing adhesive tape 5. The procedure is not particularly limited.

1 Exterior member 21 Fluid pipe
1a body 22 cladding tube
6 Adhesive tape for connection 23 Cheese joint 9, 10 Sealing portion 25 Elbow joint 11 Auxiliary member 31 Insulating material 12 Ring plate (auxiliary member) 34 Drawer 13 Winding tape (auxiliary member) S Axial gap 14 Half Circular pipe (auxiliary member) T Radial gap

Claims (11)

The heat insulating tube is exposed by an axial gap between a tip of a cladding tube formed of a foamed resin and into which a fluid tube is inserted, and a heat insulating material in which a joint to which the fluid tube is connected is accommodated. An exterior member that covers and protects the material over the cladding tube,
Formed into a cylindrical body,
It comprises a joint part that is joined to the heat insulating material so as not to move in the axial direction,
An exterior member characterized in that the cladding tube is accommodated together with the fluid tube in a state in which axial movement of the tip of the cladding tube is allowed.   A cylindrical gap having an inner diameter larger than the outer diameter of the cladding tube is formed, and a radial gap between the inner surface of the cylindrical body and the outer surface of the cladding tube is formed on the end side opposite to the heat insulating material. The exterior member according to claim 1, wherein a sealing portion for sealing is provided.   The sealing portion is reduced in diameter toward an end portion opposite to the heat insulating material in the cylindrical body, and is cut in a direction orthogonal to the tube axis at a position corresponding to the tube diameter of the fluid pipe and the cladding pipe. The exterior member according to claim 2, wherein the exterior member is formed. It consists of a main body made of the cylindrical body, and an auxiliary member fitted on the end of the cladding tube,
The auxiliary member is externally fitted so as to be movable inside the main body along with the axial movement of the cladding tube accommodated in the main body, and an outer surface abuts on the inner surface of the main body and the inner surface of the main body The exterior member according to claim 1, wherein a gap in a radial direction between the outer surface of the cladding tube is sealed. In order to support multiple types of cladding tubes with different diameters,
The body has an inner diameter that is greater than the outer diameter of the largest diameter of the cladding tube;
The auxiliary member is formed of a winding tape that is wound around an outer surface of an end portion of the cladding tube by adjusting a winding amount so that an outer diameter is equal to or larger than an inner diameter of the main body. 4. The exterior member according to 4. In order to cope with two types of cladding tubes with different diameters,
The main body is in contact with the outer surface of the cladding tube having an inner surface having a large diameter,
5. The exterior member according to claim 4, wherein the auxiliary member is formed so that an outer surface is in contact with an inner surface of the main body in a state of being externally fitted to the small-diameter cladding tube. A fluid pipe connection structure comprising: a fluid pipe covered with a cladding pipe formed of foamed resin; a joint to which the fluid pipe is connected; and a heat insulating material for housing the joint;
The fluid pipe connected to the joint is drawn out from the outlet of the heat insulating material;
A cylindrical exterior member is provided that covers and protects the fluid pipe exposed by the axial gap between the tip of the cladding tube and the heat insulating material from the heat insulating material to the cladding tube,
The exterior member is
It is bonded to the heat insulating material so as not to move in the axial direction with respect to the heat insulating material,
A connecting structure for fluid pipes, wherein the cladding pipe is housed together with the fluid pipe in a state in which axial movement of the tip of the cladding pipe is allowed.   The exterior member is formed in a cylindrical body having an inner diameter larger than the outer diameter of the cladding tube, and on the end side opposite to the heat insulating material, between the inner surface of the cylindrical body and the outer surface of the cladding tube. The fluid pipe connection structure according to claim 7, wherein a sealing portion for sealing a radial gap is provided.   The sealing portion of the exterior member is reduced in diameter toward the end opposite to the heat insulating material in the tubular body, and is orthogonal to the tube axis at a position corresponding to the tube diameter of the fluid pipe and the cladding pipe. 9. The fluid pipe connection structure according to claim 8, wherein the fluid pipe connection structure is formed so as to be cut in a direction. The exterior member includes a main body made of a cylindrical body,
An auxiliary body is fitted on the end of the cladding tube,
The auxiliary body is externally fitted so as to be movable inside the main body along with the axial movement of the cladding tube accommodated inside the main body of the exterior member, and the outer surface abuts on the inner surface of the main body. The fluid pipe connection structure according to claim 7, wherein a radial gap between an inner surface and the outer surface of the cladding tube is sealed. In order to support multiple types of cladding tubes with different diameters,
The body of the exterior member has an inner diameter that is larger than the outer diameter of the cladding tube having the maximum diameter,
The auxiliary body is formed of a winding tape that is wound around the outer surface of the end portion of the cladding tube by adjusting the winding amount so that the outer diameter is equal to or larger than the inner diameter of the main body of the exterior member. The fluid pipe connection structure according to claim 10.

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