JP2006144860A - Cover body for functional pipe and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover body for a functional pipe capable of protecting the end part of the functional pipe and a method of manufacturing the cover body. <P>SOLUTION: The soundproof pipe 2 is covered with a soundproof material 20 having a soft sound absorbing layer 21 formed of a raw material with water absorbency formed on the outer peripheral surface of a pipe 10. The cover body 1 used for the soundproof pipe 2 is formed of a material with water repellency, and comprises a cover part and a cylindrical part 40. By covering the end part of the soundproof pipe 2 by the cover body 1, the flooding of the end face of the soundproof pipe 2 by water can be suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a functional piping lid that protects functional piping applied to piping such as a building water supply / drainage device and an air conditioner.

The building has a water supply / drainage device and an air conditioner, and these devices are joined to a pipe line formed by combining pipes. Such a pipe line may be configured using a pipe to which soundproofing and heat retaining functions are added. Many of these functional pipes are formed by covering a pipe with a functional material that includes at least a layer made of a water-absorbing material. In the case of a soundproof pipe, the pipe is covered with a soundproof material that includes at least a water-absorbing material, thereby functioning to suppress the generation of noise caused by the fluid flowing through the pipe. Further, in the case of a heat insulation pipe, the heat insulation material configured to include at least a material having water absorption functions so that the fluid flowing through the pipe does not change in temperature during the circulation process. Among such functional pipes, for example, the soundproof pipe described in Patent Document 1 is generated by water supply / drainage flowing through the pipe by covering the outer peripheral surface of the pipe with a soundproof material composed of a sound absorbing layer and a sound insulating layer. Noise is reduced.
JP2003-314781

  The soundproof piping as the functional piping as described in Patent Document 1 is temporarily put together at the construction site until it is transported to the construction site and combined as a pipeline. In such a transportation / temporary placement stage, since the end of the soundproof pipe is not protected at all, it may be damaged or damaged by some impact, so that it may not function as a pipe or may be significantly deteriorated in function. And what is most problematic is the problem of water exposure. Conventionally, in the soundproof piping at the transportation / temporary placement stage, the end of each pipe is not protected at all, and the end of the soundproof material is exposed. In such a state, when the soundproof piping is wetted by rain or the like, the sound absorbing material particularly absorbs moisture in the sound absorbing layer portion. Once the moisture is absorbed, the sound absorbing layer portion may be swollen or in some cases rotted, and the function as a soundproof material may be reduced. Moreover, even if it is combined as a pipe line at the construction site, the end of the soundproof pipe is in an exposed state until the pipe is piped, so the problem of water exposure is not solved.

  This invention is made | formed in view of such a situation, The objective is to provide the cover body for functional piping which can protect the edge part of functional piping, and its manufacturing method.

  In order to achieve the above object, the invention according to claim 1 is a lid for functional piping used for functional piping in which the outer peripheral surface of the piping is covered with a functional material having at least a layer made of a material having water absorption. The cover part and the cylinder part are provided, and the gist is that the cover part and the cylinder part are formed of a material having water repellency.

  According to this structure, since the edge part of functional piping can be coat | covered with the raw material which has water repellency, the moisture covering of the soundproof material in functional piping is avoided. The lid portion functions to cover the end portion of the functional piping, and the cylindrical portion can function to prevent the entire lid body from falling off from the functional piping.

The invention according to claim 2 is characterized in that, in the functional piping lid according to claim 1, the water-repellent material is a heat-shrinkable film.
According to this structure, the dimension management of the whole shape of the lid for functional piping becomes easy. That is, the heat shrinkable film is thermally shrunk along a predetermined shape, whereby a lid that matches a specific functional pipe can be obtained.

  According to a third aspect of the present invention, in the functional piping lid according to the second aspect, the heat-shrinkable film is intensively heat-shrinked and focused on at least one of the lid portion and the cylindrical portion. The gist is that a converging part is provided.

  Usually, this type of focusing part is generally further processed and removed from the lid. In the invention which concerns on Claim 3, not only the further process becomes unnecessary by providing this structure, For example, it also becomes possible to utilize this convergence part as a handle.

The invention according to claim 4 is characterized in that, in the lid for functional piping according to any one of claims 1 to 3, a plate material is disposed in an inner region surrounded by the lid portion and the cylindrical portion. To do.
According to this configuration, the shape retention of the functional piping lid is improved by the plate material.

  The invention according to claim 5 is a bag-making process for making a bag by joining one end of a heat-shrinkable film formed in a cylindrical shape, and a tube is inserted into the opening at the other end. Separating the heat-shrinkable film from the tube, a tube insertion step, a heat-shrinking step of heat-shrinking the heat-shrinkable film along the tube by applying heat to the bag-formed heat-shrinkable film And a separation step.

  According to this configuration, since the heat-shrinkable film is formed along the shape of the tube, it is possible to manufacture a functional piping lid that easily matches the shape of the tube.

  According to the lid for functional piping of the invention which concerns on Claims 1-4, it can suppress that the function of functional piping falls by water exposure, an impact, etc. Moreover, according to the manufacturing method of the lid for functional piping of the invention which concerns on Claim 5, the lid for functional piping can be manufactured easily.

Hereinafter, a soundproof piping lid which is an embodiment of the functional piping lid will be described with reference to FIGS. 1 and 2.
Before describing the lid 1 for soundproof piping (hereinafter referred to as “lid 1”), the configuration of the soundproof piping to which the lid 1 is attached will be described. The soundproof pipe 2 is configured by covering the pipe 10 with a soundproof material 20. The pipe 10 is not particularly limited, and a conventionally known pipe is used as a water supply / drainage pipe. For example, a pipe made of polyvinyl chloride (PVC), polyethylene, aluminum, or the like is used. The soundproof material 20 is formed by laminating a soft sound absorbing layer 21, a sound insulating sheet layer 22, and an outer layer sheet layer 23. The soft sound absorbing layer 21 is not particularly limited, and a conventionally known sound absorbing layer is used as the sound absorbing layer. More specifically, for example, having an open cell structure in which polyurethane, polychloroprene, styrene butadiene copolymer, polyethylene, polypropylene, ethylene vinyl acetate, styrene, or the like is foamed by blending alone or in combination of two or more. Alternatively, since the nonwoven fabric, glass wool, rock wool, or the like is used, it can be said that the soft sound-absorbing layer 21 is made of a material having water absorption. The soundproofing material 20 of the present embodiment is formed by laminating a soft sound absorbing layer 21, a sound insulating sheet layer 22, and an outer layer sheet layer 23. Of these, if at least the soft sound absorbing layer 21 is provided, the soundproofing material 20 It can also be configured as a material 20. Further, the lid 1 can be applied to a heat insulation pipe having the same configuration as the soundproof pipe 2.

The lid 1 is attached to the soundproof pipe 2 configured as described above.
The lid 1 is composed of a heat-shrinkable film, which is a water-repellent material, and includes a lid 30 and a cylinder 40. The lid portion 30 corresponds to the end portion of the soundproof pipe 2 and has a substantially circular shape. The shape of the lid portion 30 depends on the shape of the plate member 50 described later. However, if the configuration of the plate member 50 is ignored, it can be said that the shape is circular or substantially circular. The lid portion 30 includes a converging portion 31 in which the heat-shrinkable film is concentrated by being thermally contracted in a concentrated manner. That is, the converging part 31 is formed on the center side of the lid part 30 (the axial direction side of the cylinder part 40 to be described later), and the converging part 31 is not formed on the peripheral side of the lid part 30, and the planar end surface is formed. 32 is formed. The converging portion 31 includes a through hole 33 that communicates the inside and outside of the lid portion 30.

  The cylinder part 40 is formed so as to form a cylindrical shape or a substantially cylindrical shape. The cylindrical portion 40 is provided corresponding to the outer peripheral surface of the outer layer sheet layer 23 of the soundproof pipe 2. The cylindrical portion 40 is formed so that its diameter is uniform or substantially uniform in the axial direction of the cylindrical portion 40. That is, the shape of the cylinder part 40 is a shape without a taper. In addition, although it is the diameter of the cylinder part 40, if it respond | corresponds so that it may become a little larger than the diameter of the outer peripheral surface of the soundproof piping 2, the function as the cover body 1 can be exhibited suitably. The length in the longitudinal direction of the cylindrical portion 40 is configured to be longer than the diameter of the lid portion 30. Moreover, in order that the thickness of the cylinder part 40 may obtain a higher deformability, the heat-shrinkable film of 0.02 mm-0.3 mm is heat-shrinked.

  A plate material 50 made of, for example, foamed polypropylene, foamed polystyrene, or the like is disposed in the inner region surrounded by the lid part 30 and the cylinder part 40. The plate member 50 is disposed at an end portion of the cylindrical portion 40 on the lid portion 30 side while being in contact with the inner surface of the lid portion 30. The plate member 50 includes a base 51 having a polygonal cross section (in this embodiment, a hexagonal column), and a columnar convex portion 52 that protrudes from the base 51 toward the inner region of the tubular portion 40. The diameter intersecting the axis of the plate member 50 is configured such that the base 51 is longer than the convex 52, and a step appears between the base 51 and the convex 52 depending on the size configuration. Become. The plate member 50 includes a through hole 53 along the axis, and the arrangement of the through hole 53 corresponds to the through hole 33 of the lid 1.

Next, a method for manufacturing the lid 1 as described above will be described.
In the manufacturing method according to the present embodiment, a bag making process, a tube insertion process, a heat shrinking process, and a separation process described below are sequentially performed. In the bag making process, first, the cylindrical heat-shrinkable film is cut into a predetermined length. After cutting, one open end is joined and sealed by thermal welding. Specifically, the outer peripheral edge of one end of the heat-shrinkable film is sandwiched by a welding part (not shown) of a heat welding machine incorporating a heater, and the one end is joined. In this step, one end is sealed and the other end is processed into a bag-like heat-shrinkable film.

  After the bag making process, a tube insertion process is performed. In this tube insertion process, first, the plate material 50 is mounted. The plate member 50 is arranged so that the convex portion 52 protrudes toward the opening side of the other end of the heat-shrinkable film, while the base portion 51 is in contact with the portion where one end is sealed in the bag making process. In this case, since the heat-shrinkable film is before heat shrinkage, it is easy to mount the plate material 50. And the pipe | tube 61 is inserted from opening of the other end of a heat-shrinkable film until the front-end | tip contacts the said board | plate material 50. FIG. Although it is the pipe | tube 61 used at this time, the thing equivalent to a diameter a little larger than the outer diameter of the soundproof piping 2 used as the attachment object of the cover body 1 is used.

  After the tube insertion process, a heat shrink process is performed. In the heat shrinking process shown in FIG. 3, the heat-shrinkable film and the pipe 61 that have undergone the pipe inserting process are placed on the roll conveyor 62. The heat-shrinkable film placed on the roll conveyor 62 is automatically conveyed to the heating device 63 by the roll conveyor 62. The heat-shrinkable film is heat-shrinked by passing through the heating device 63. At this time, the heat-shrinkable film heat-shrinks along the tube 61 that has been inserted. Moreover, at the time of this heat shrinkage | contraction, a heat-shrinkable film heat-shrinks so that the shape of the base 51 of the board | plate material 50 can appear. And the board | plate material 50 is set to the inner area of the cover body 1 so that a movement is impossible.

  Here, the heating device 63 used in the heat shrinking process will be briefly described. The heating device 63 includes a tunnel provided so as to pass through the heating device 63. Inside the heating device 63, rod-shaped infrared heaters 64 are arranged at equal intervals so as to surround the tunnel. Yes. Therefore, when the heat-shrinkable film that has undergone each of the above steps passes through the tunnel, it heat-shrinks due to the radiant heat of the infrared heater 64. The heat shrinkage rate of the heat-shrinkable film at this time is adjusted by the time for the heat-shrinkable film to pass through the tunnel. For example, when the shrinkage rate of the heat-shrinkable film is 35%, in the heating device 63 in which nine 500 W infrared heaters 64 are arranged, the time for passing through the tunnel is 6 to 10 seconds.

  A separation process is performed after the heat shrink process. In the separation step, the heat-shrinkable film is heat-shrinked along the tube 61 and is in close contact therewith, so that the heat-shrinkable film after shrinkage is separated from the tube 61 after being left for a predetermined time. After the separation, the through-hole 33 and the through-hole 53 penetrating the lid portion 30 and the plate material 50 of the lid 1 are drilled by the hole drilling machine. The lid body 1 is manufactured through the above steps.

Next, the use state of the lid 1 of the present embodiment will be described with reference to FIGS. 1 and 2.
The lid body 1 is mounted so as to completely cover the end portion of the soundproof pipe 2. At the time of mounting, the convex portion 52 of the plate material 50 is fitted into the inner region of the pipe 10, and the end portions of the pipe 10 and the soundproof material 20 are brought into contact with the step formed by the base portion 51 and the convex portion 52 of the plate material 50. Will be. Specifically, the inner diameter T1 of the cylinder portion 40 is substantially equal to the outer diameter T2 of the soundproof pipe 2, and the inner surface of the cylinder section 40 and the outer surface of the soundproof pipe 2 are in close contact with each other. Similarly, since the outer diameter T3 of the convex portion 52 provided in the plate member 50 is substantially equal to the inner diameter T4 of the pipe 10, the outer peripheral surface of the convex portion 52 and the inner peripheral surface of the pipe 10 are in close contact. When the lid body 1 is attached to the soundproof pipe 2 and when the lid body 1 is detached from the soundproof pipe 2, the through hole 33 of the lid portion 30 and the through hole 53 of the plate member 50 both function as air circulation holes. Therefore, even when the lid body 1 and the soundproof pipe 2 are in close contact with each other, the attaching / detaching operation of the lid body 1 can be easily performed.

The following point can be mentioned as an effect of the said embodiment.
(1) By covering the end surface of the soundproof pipe 2 with the lid portion 30 formed of a water-repellent material, it is possible to suppress water exposure on the end face of the soundproof pipe 2, particularly water resistance of the soft sound absorbing layer 21.

  (2) Since the lid body 1 has the cylindrical portion 40, even if an external force is applied to the lid body 1 or the soundproof pipe 2 for some reason while suitably preventing the end face of the soundproof pipe 2 from being wet. The lid 1 can be prevented from falling off the soundproof pipe 2. In particular, if the lid 1 is in close contact with the soundproof pipe 2 with the dimensions as in the above embodiment, the falling off of the lid 1 can be suppressed considerably suitably.

  (3) The lid portion 30 is formed with a converging portion 31 in a state of being thermally contracted. Since this converging part 31 is not extinguished by a special process and remains as the structure of the lid body 1, there is no extra cost. In addition, the converging part 31 can be made to function as a handle when the lid 1 is detached from the soundproof pipe 2. In addition, since the through hole 33 as an air circulation hole is formed in the converging portion 31, the shape of the converging portion 31 that is folded in a complicated manner suppresses intrusion of rainwater or the like into the through hole 33.

  (4) Since the lid body 1 is formed of a thin heat-shrinkable film, the deformability of the lid body 1 is increased, and when the lid body 1 is attached to the soundproof pipe 2, Increases closeness. Moreover, according to the said manufacturing method, the internal diameter management of the cover body 1 can be made easy according to the outer diameter of the soundproof piping 2 at the time of manufacture.

  (5) Since the through hole 53 of the plate member 50 is provided along the axis of the plate member 50 and the through hole 33 of the lid portion 30 is provided corresponding to the through hole 53 of the plate member 50, the through hole 33 and the through-hole 53 conduct | electrically_connect the hollow area of the piping 10, and an outer region, when the cover body 1 is attached to the soundproof piping 2. As shown in FIG. Therefore, even if the lid 1 and the soundproof pipe 2 are in close contact with each other, the hollow area of the soundproof pipe 2 is not sealed. That is, since the through-hole 33 and the through-hole 53 play a role of removing air from the hollow area of the soundproof pipe 2, the work of detaching the lid 1 from the soundproof pipe 2 can be performed smoothly.

  (6) The plate member 50 covers the end portion of the soundproof pipe 2 with the base 51 and the convex portion 52, and the level difference revealed by the configuration of the base portion 51 and the convex portion 52. In particular, since the end of the soft sound-absorbing layer 21 of the soundproof pipe 2 is in contact with the step of the plate member 50 and is covered with the lid 30, there is little possibility of being wet. Furthermore, since the shape retaining property of the lid body 1 is improved by the plate member 50, the end portion can be protected from an impact or the like. Further, as long as the inner diameter T1 of the cylindrical portion 40 is approximately equal to the outer diameter T2 of the soundproof pipe 2, the inner surface of the cylindrical section 40 and the outer surface of the soundproof pipe 2 are in close contact with each other. For this reason, it is possible to suppress the lid 1 from being detached from the soundproof pipe 2. Similarly, if the outer diameter T3 of the convex portion 52 included in the plate member 50 is provided so as to be substantially equal to the inner diameter T4 of the pipe 10 of the soundproof pipe 2, the outer surface of the convex section 52 and the inner surface of the pipe 10 are in close contact. It is possible to more suitably suppress the lid body 1 from being removed from the soundproof pipe 2.

  (7) According to the manufacturing method of the lid body 1 of the present embodiment, the lid body 1 can be easily obtained because the lid body 1 is manufactured by the heat-shrinkable film. At this time, it is easy to manage the dimensions such as the inner diameter of the lid 1, and it is possible to obtain appropriate rigidity by heat shrinking. If the diameter of the tube 61 inserted into the heat-shrinkable film is changed in the tube insertion step, the lid body 1 having a desired inner diameter can be easily manufactured.

In addition, you may change this embodiment as follows.
In the above embodiment, the converging part 31 is provided in the center of the lid part 30, but the converging part 31 may be formed on the entire lid part 30. Further, the converging part 31 may be formed in the cylindrical part 40.

  In the above embodiment, the converging part 31 is simply configured in a state where the sealed portion of the bag-shaped heat-shrinkable film is heat-shrinked. Alternatively, it may be deformed into a bowl shape or a protruding shape. Further, the lid portion 30 may be heat-treated in a flat shape so that the presence of the converging portion 31 is not known.

  In the above embodiment, the through hole 33 and the through hole 53 are formed along the axis of the lid 30 and the plate member 50, but the positions may be changed as appropriate. Further, if there is a gap between the lid 30 and the plate member 50, the arrangement of the through holes 33 and the through holes 53 may be different from each other.

  (Circle) in the said embodiment, although the cylinder part 40 was formed in the cylinder shape, the shape is not limited to a cylinder shape. For example, the cylindrical portion 40 may be configured by a plurality of wall surfaces extending in a comb shape at a predetermined interval. Since the cylinder part 40 should just be mounted | worn with the outer peripheral surface of the soundproof piping 2, if only the function can be fulfill | performed, a shape will not be specifically limited.

  O Although it is the diameter of the cylinder part 40, it is not necessary to comprise so that it may become uniform along an axial direction. For example, the diameter of the cylindrical portion 40 may be set so as to have a tapered appearance in which the diameter gradually increases from the end on the lid 30 side toward the opening end.

  In the above-described embodiment, the cylindrical portion 40 is the open end, but the virtual plane including the open end and the axis of the cylindrical portion 40 are configured to be orthogonal or substantially orthogonal, but the virtual plane is the cylindrical portion. You may comprise so that 40 axis lines may be crossed. In this case, the lid 1 can be easily attached to the soundproof pipe 2.

  In the above embodiment, when the lid 1 is attached to the end portion of the soundproof pipe 2, the inner surface of the tube portion 40 and the outer surface of the soundproof pipe 2 do not necessarily have to be in close contact with each other. If the cover body 1 can completely cover the soundproof pipe 2, the function of the cover body 1 is sufficiently fulfilled. However, if the distance between the inner surface of the cylindrical portion 40 and the outer surface of the soundproof pipe 2 is too large, the lid 1 is likely to be detached from the soundproof pipe 2, so care must be taken.

  O Although it is the shape of the base 51 and the convex part 52 of the board | plate material 50 of the said embodiment, all of these shapes can be changed suitably. For example, the base 51 may be cylindrical, and the convex 52 may be polygonal in cross section or elliptical in cross section. However, if the base 51 is a protrusion having a polygonal cross section, it is convenient when the lid body 1 is detached while rotating.

  In the above embodiment, it is possible to omit the through hole 33 of the lid part 30, the convex part 52 of the plate member 50, and the through hole 53. Further, even if the plate member 50 itself is not disposed, the above-described object of the present invention can be achieved as the functional piping lid.

  The material having water repellency used for the lid 1 may be any known material other than the heat-shrinkable film. For example, polyvinyl chloride as a thermoplastic resin or phenol resin as a thermosetting resin may be used as a material having water repellency.

  (Circle) what kind of well-known thing may be used for the heat-shrinkable film which is the material of the cover body 1. For example, a heat-shrinkable film using a vinyl chloride resin, polyethylene, polypropylene, polystyrene, a fluororesin, a polyester film, or the like as a material may be used.

  In the above embodiment, the case of the soundproof pipe 2 as the functional pipe has been described, but the cover body 1 can also be described by replacing the soundproof pipe 2 with the heat insulation pipe. That is, the function itself is not limited as long as it is a functional pipe that covers at least the outer peripheral surface of the pipe with a functional material that includes at least a layer made of a water-absorbing material. What the lid 1 is intended for is such functional piping, and the configuration of the lid 1 is not limited by the function itself. Therefore, the lid 1 has an open cell structure in which polyurethane, polychloroprene, styrene butadiene copolymer, polyethylene, polypropylene, ethylene vinyl acetate, styrene, or the like is foamed by blending alone or in combination of two or more. Alternatively, the present invention can also be applied to a heat insulating pipe whose outer peripheral surface is covered with a heat insulating material that includes at least a layer formed of a nonwoven fabric, glass wool, rock wool, or the like.

  In the above embodiment, one end of the hollow cylindrical heat-shrinkable film is bonded by heat welding, but the bonding method may not be heat welding. For example, you may join the end of a hollow cylindrical heat-shrinkable film using an adhesive agent.

  In the above embodiment, in the tube insertion step, the tube 61 is inserted as it is into the lid body 1 (before heat shrinkage), but after the silicone release agent is applied to the surface of the tube 61, the tube 61 is inserted. Also good. If it does in this way, in the separation process, separation of lid 1 (after heat contraction) from tube 61 will become easy. Alternatively, after the release paper (thickness of 0.1 mm or less) is wound around the surface of the tube 61, the tube 61 may be inserted into the bag body 1 (before heat shrinking). In this way, the same effect as described above is produced.

  O Although it is the through-hole 33 of the cover part 30 and the through-hole 53 of the board | plate material 50, formation by a hole drilling machine may be simultaneous, or may be separate. Moreover, the timing of hole formation may be before the heat shrinkage of the heat shrinkable film.

The cover for soundproof piping and soundproof piping in this embodiment. Sectional drawing of the cover body for soundproof piping. Schematic of the heating apparatus used at a heat contraction process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sound-proof piping cover body, 2 ... Sound-proof piping, 10 ... Piping, 20 ... Soundproof material, 30 ... Cover part, 31 ... Condensing part, 33 ... Through-hole, 40 ... Tube part, 50 ... Plate material, 61 ... Pipe, 63 ... Heating device.

Claims (5)

In the functional piping lid used for the functional piping in which the outer peripheral surface of the piping is covered with a functional material having at least a layer made of a material having water absorption,
A lid for functional piping, comprising a lid and a cylinder, wherein the lid and the cylinder are formed of a material having water repellency. The functional piping lid according to claim 1, wherein the material having water repellency is a heat-shrinkable film. The functional piping lid according to claim 2, wherein a converging portion in which the heat-shrinkable film is concentrated by heat shrinking and converging is provided on at least one of the lid portion and the cylindrical portion. . The functional piping lid according to any one of claims 1 to 3, wherein a plate material is disposed in an inner region surrounded by the lid and the cylinder. A bag making process for making a bag by joining one end of the heat-shrinkable film formed in a cylindrical shape, a tube inserting process for inserting a pipe into the opening of the other end, and a bag made A heat shrinking step of heat shrinking the heat shrinkable film along a tube by applying heat to the heat shrinkable film, and a separating step of separating the heat shrinkable film from the tube. A method for manufacturing a functional piping lid.

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