JP2012057736A - Piping support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open and close a piping insertion part without affecting application of a heat insulating material.SOLUTION: A hanging band 1 is composed of a piping insertion part 2 formed to be annularly curved and coupling parts 3, 3 extended from respective open ends thereof, a resin pipe 7 is inserted through the piping insertion part 2, a lower end 6 of a coupling implement 5 is sandwiched between the pair of the coupling parts 3, 3 and a bolt 8 is inserted through bolt insertion holes 10, 10 and fastened with a nut 9, and thus the resin pipe 7 can be hung from an upper floor slab. On a side opposite to a side with the pair of the coupling parts 3, 3 arranged thereon, a cross-section chipped area 11 is formed, and on cross-section non-chipped areas 12, 12 extending on both sides of the cross-section chipped area, respectively, ribs 13 are provided along the circumferential direction, respectively. The cross-section chipped area 11 is formed by forming a rectangular opening 14 near the center along the width direction of a strip-shaped steel sheet 21, and by leaving bridges 15, 15 on both sides of the rectangular opening.

Description

  The present invention relates to a pipe support used when supporting a pipe.

  In air conditioning equipment construction and sanitary equipment construction, various pipes are used according to applications and purposes, and are roughly divided into metal pipes and resin pipes when classified by material.

  For example, lining steel pipes coated with polyethylene or hard polyvinyl chloride, resin pipes such as hard polyvinyl chloride pipes and polyethylene pipes are used for water supply pipes, and stainless steel pipes and heat resistant pipes are used for hot water supply pipes. Rigid polyvinyl chloride lining steel pipe is used.

  When installing these pipes in a building, in the case of sideways pipes, they are suspended from the ceiling or upper floor slab with a suspension band (suspending band), and in the case of a riser pipe, they are fixed to the wall with a standing band (standing band). Thus, it is common to support each pipe.

  Such a pipe support such as a hanging band or a standing band is formed in an annular shape so as to face each other from a pipe insertion part configured to allow each pipe to be inserted thereinto and each end of the pipe insertion part. A pair of connecting portions respectively extending in a radial direction, and a connecting tool fixed to a lower end or a wall surface of the connecting member fixed to the ceiling surface or the lower surface of the upper floor slab between the pair of connecting portions. Each pipe can be suspended from the ceiling or upper floor slab or fixed to the wall by inserting the above-mentioned pipes into the pipe insertion part and inserting bolts into a pair of connecting parts and tightening them. It is like that.

  Here, the hanging band and the standing band are commercially available so-called lantern-type bands in which the pipe insertion part is integrally formed in an annular shape, and when used, hold the vicinity of the connecting part by hand and open it outward. After expanding the gap between the connecting parts by elastic deformation or plastic deformation of the pipe insertion part, inserting the pipe from there, the pipe insertion part is closed in the opposite direction and the connection parts are made to face each other as they are As described above, it is designed to be bolted to the connector, and with this configuration, it is possible to attach a hanging band or a standing band to the pipe even at an intermediate position of the pipe.

  On the other hand, if the size of the pipe insertion part is increased to some extent, even if it is going to return the pipe insertion part where the interval between the connecting parts is expanded to the original annular shape, it will not return to its original shape due to the large plastic deformation, and it will be held with both hands. If it is not attached, bolts cannot be joined, and workability is reduced.

  For this reason, a pair of semi-circular pipe insertion pieces are hinged to each other at their ends so that they can be adapted to large-diameter pipes, and connected to the other end of the pipe insertion piece. A so-called hinge-type band is also available on the market, each holding a pipe insertion piece or connecting part and opening it around the hinges, and expanding the gap between the connecting parts. Then, it is closed in the reverse direction so that the connecting portions face each other as before, and can be bolted to the connecting tool as described above.

  With this configuration, it is possible to easily attach a suspension band or a standing band to a large-diameter pipe.

JP-A-11-94133

  However, in the hinge type hanging band and the standing band, the hinge protrudes outward, so when winding the heat insulating material, not only does the work of bringing the heat insulating material into close contact with the pipe support, but also the lantern type band. As a matter of course, there was a problem that the cost was high.

  Regarding such a problem, although a configuration is known in which an opening is provided below the band instead of the hinge (Patent Document 1, FIG. 5), in this method, the rotation center when opening and closing the pipe insertion portion is not necessarily an opening location. The present applicant has clarified that an unintended portion can be the center of rotation.

  For this reason, there is a problem that it is difficult to design and manufacture the pipe support.

  Also, if there is a risk of contact corrosion of dissimilar metals between the pipe and the pipe support, the pipe insertion part is not a structure in which the metal main body is exposed, but a structure in which the metal main body is covered with an electrical insulator. However, if there is a protruding portion such as a hinge, uniform coating becomes difficult, and there is a problem that sufficient electrical insulation performance cannot be secured.

  As described above, it is necessary to configure the pipe insertion portion so that it can be opened and closed by a method other than the hinge. In addition, regarding the material used for the electrical insulator described above, conventionally, soft polyvinyl chloride has been widely used as the material for the electrical insulator. Recently, corrosion that has been caused by soft polyvinyl chloride has been reported, and the need to separately select a coating material other than soft polyvinyl chloride has arisen.

  The reported case that seems to be caused by soft polyvinyl chloride is when a stainless steel pipe wrapped with a heat insulating material made of glass wool or rock wool is suspended using a pipe support covered with soft polyvinyl chloride. Among the tools, corrosion at a pipe insertion portion covered with soft polyvinyl chloride and corrosion at a portion of a stainless steel pipe suspended by a pipe support tool have been observed.

  As a result of the investigation by the present applicant, it is speculated that the above-mentioned problems may be caused by the plasticizer eluting from the soft polyvinyl chloride by heating with hot water flowing in the stainless steel pipe, and causing the corrosion of the plasticizer. The

  On the other hand, if the operation of the boiler is temporarily interrupted for inspection or the like, condensation occurs on the peripheral surface of the stainless steel pipe placed in a hot and humid environment, and the condensed water stays at the place of the pipe support. There is also a possibility that the corrosion progress was accelerated.

  Furthermore, since it is unclear to what extent the temperature has been raised, it is also necessary to examine the possibility that the hydrogen chloride gas generated from soft polyvinyl chloride has caused corrosion.

  Such defects are caused by environmentally friendly use of energy efficient air conditioning systems such as cogeneration and Ecocute (registered trademark). For example, when storing hot water heated using midnight power, From the standpoint of thermal efficiency, the set temperature is inevitably high, and as a result, it is speculated that the hot water supply temperature may have exceeded the normal heat resistance temperature of soft polyvinyl chloride.

  However, in any case, soft polyvinyl chloride is likely to cause corrosion, and in waste treatment, hydrogen chloride gas generated by the combustion of soft polyvinyl chloride damages the incinerator. However, there is an urgent need to select a covering material to replace soft polyvinyl chloride, while there are concerns that dioxins may be generated during low-temperature heating.

  Here, it is necessary to make the covering material and the opening / closing mechanism of the pipe insertion portion compatible with each other. If the newly selected covering material is harder than soft polyvinyl chloride, the opening / closing mechanism of the pipe insertion portion. Must be a mechanism that does not damage the dressing even if it is hard.

  The present invention has been made in consideration of the above-described circumstances, and has as its first object to provide a pipe support that can open and close the pipe insertion portion so as not to affect the construction of the heat insulating material. To do.

  Moreover, in addition to the 1st objective, this invention aims at providing the piping support tool which can coat | cover this electrical insulator uniformly, when it is necessary to coat | cover an electrical insulator.

  In addition to the first object of the present invention, when it is necessary to cover an electrical insulator, the stainless steel pipe is supported in a healthy manner without causing corrosion even when heated by hot water flowing in the stainless steel pipe. An object of the present invention is to provide a pipe support that can be used.

In order to achieve the above object, the pipe support according to the present invention, as described in claim 1, is formed in an annular shape so that the open ends face each other, and the pipe insertion structure is configured so that the pipe can be inserted inside thereof. And a pair of connecting portions facing each other extending radially from each open end of the pipe insertion portion, and fixed to the ceiling surface or the lower surface of the upper floor slab between the pair of connecting portions. In the pipe support tool that can hold the pipe inserted through the pipe insertion part by sandwiching the lower end of the connected tool or by bolting the tip of the connector fixed to the wall surface,
Of the pipe insertion portion, a cross-sectional defect region is formed on a side opposite to the side where the pair of connecting portions are disposed, and a rib extending along the circumferential direction is formed on a non-cross-sectional defect region extending on both sides of the cross-sectional defect region. Each is provided.

  In the pipe support according to the present invention, the cross-sectional defect region is configured by a bridge having a cross-sectional width narrower than that of the non-cross-sectional defect region.

  Moreover, the piping support tool which concerns on this invention forms the rectangular opening in the center vicinity along the width direction of the said piping penetration part, and makes the part which remained on the both sides of this rectangular opening the said bridge | bridging.

  In addition, the pipe support according to the present invention is provided with a notch at a position substantially opposite the center of each bridge and facing each other.

Further, as described in claim 5, the pipe support according to the present invention is formed in an annular shape so that the open ends face each other, and a pipe insertion part configured to allow a metal pipe to be inserted inside the pipe insertion part, A pair of connecting portions facing each other and extending in the radial direction from each open end of the pipe insertion portion, and a connecting tool fixed to the ceiling surface or the lower surface of the upper floor slab between the pair of connecting portions In the pipe support tool adapted to hold the metal pipe inserted into the pipe insertion part by sandwiching the lower end or by pinching the tip of the coupling tool fixed to the wall surface and bolting,
The pipe insertion portion is composed of a metal main body and an electric insulator coated on at least the inner peripheral surface of the metal main body, and the electric insulator is made of a fluororesin or an acrylic resin having a normal heat resistant temperature of 90 ° C. or more. Forming a cross-sectional defect region on a side of the metal body opposite to the side on which the pair of connecting portions are disposed, and extending along a non-cross-sectional defect region extending on both sides of the cross-sectional defect region along the circumferential direction. Each rib is provided.

  Further, the pipe support according to the present invention is such that the electrical insulator is made of a fluororesin, and the fluororesin is made of polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA). Alternatively, tetrafluoroethylene / ethylene copolymer (ETFE) is used.

  In the pipe support according to the present invention, the cross-sectional defect region is configured by a bridge having a cross-sectional width narrower than that of the non-cross-sectional defect region.

  Moreover, the piping support tool which concerns on this invention forms the rectangular opening in the center vicinity along the width direction of the said piping penetration part, and makes the part which remained on the both sides of this rectangular opening the said bridge | bridging.

  In addition, the pipe support according to the present invention is provided with a notch at a position substantially opposite the center of each bridge and facing each other.

  In the pipe support according to the first aspect of the present invention, the cross-sectional defect area is formed on the opposite side of the pipe insertion part from the side where the pair of connecting parts are disposed, and the non-cross section extends on both sides of the cross-section defect area. Ribs along the circumferential direction are provided in the defect region.

  If it does in this way, a non-cross-sectional defect area | region will each extend in the piping insertion part on both sides on both sides of a cross-section defect area | region, and a big difference will arise in a bending rigidity between a cross-section defect area and a non-cross-section defect area.

  Therefore, the bending moment generated by the force applied in the opening / closing direction of the pipe insertion part causes a large bending deformation at the cross-sectional defect area, and thus the pipe insertion part rotates around the cross-section defect area.

  As long as the cross-sectional defect area is smaller than the non-cross-sectional defect area, how the cross-sectional defect area is configured is arbitrary. .

  Here, in the bridge, the remaining part of the pipe insertion part cut out on both edges can be used as a bridge, but a rectangular opening is formed in the vicinity of the center along the width direction and remains on both sides of the rectangular opening. If the portion is a bridge, the bridge can be formed by a single process.

  Furthermore, if a notch is provided at a position substantially opposite the center of each bridge and facing each other, the cross-sectional area is further reduced at the position where the notch is provided, and the notch is formed in the pipe insertion portion. Reliably rotates around the point.

  Therefore, it is possible to prevent the twist from occurring when opening and closing the pipe insertion portion.

  Similarly to the first invention, the second invention forms a cross-sectional defect region on the opposite side of the metal body from the side where the pair of connecting portions are arranged, and the non-cross-sectional defect extends on both sides of the cross-sectional defect region. Since the ribs along the circumferential direction are respectively provided in the region, the metal main body has a configuration in which the non-cross-sectional defect region extends on both sides of the cross-sectional defect region, and between the cross-sectional defect region and the non-cross-sectional defect region. A large difference occurs in bending rigidity.

  Therefore, the bending moment generated by the force applied in the opening / closing direction of the pipe insertion part causes a large bending deformation at the cross-sectional defect area, and thus the pipe insertion part rotates around the cross-section defect area. The cross-sectional defect region and the bridge are the same as in the first aspect of the invention, and the description thereof is omitted here.

  In the second aspect of the invention, the pipe insertion portion is composed of a metal main body and an electric insulator coated on at least the inner peripheral surface of the metal main body, and the electric insulator is made of fluororesin or a normal heat resistant temperature of 90. Because it is made of acrylic resin with a temperature of ℃ or more, even if the hot water supply temperature rises due to the adoption of energy efficient air conditioning systems such as cogeneration and Ecocute (registered trademark), the covering material of the pipe supporter has sufficient heat resistance Therefore, there is no fear of corrosion due to elution of a plasticizer or generation of hydrogen chloride gas as in the case of soft polyvinyl chloride.

  Therefore, it is possible to prevent the corrosion of the metal pipe at the pipe support and the support location.

  The fluororesin can be, for example, polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), or tetrafluoroethylene / ethylene copolymer (ETFE).

  The acrylic resin is configured such that its normal heat resistant temperature is 90 ° C or higher. Acrylic resins generally have a normal heat-resistant temperature of "70-90 ° C" ("Main Plastic Properties and Applications", Japan Plastics Industry Federation, website). The polymer is appropriately modified by a known method such as copolymerization with the above monomer.

  The metal tube and the metal body include all combinations in which different metal contact corrosion may occur. For example, the metal tube is stainless steel, the metal body is carbon steel, the metal tube is copper, and the metal body is carbon steel. The case where the metal tube is austenitic stainless steel and the metal body is ferritic stainless steel is included.

  The metal pipe is a pipe for passing a high-temperature fluid, and includes not only hot water but also a metal pipe for exhausting autoclave steam.

  In conceiving the configuration relating to the electrical insulator of the second invention, a pipe support having a predetermined electrical insulation between the metal pipe and heat resistance sufficient to withstand hot water flowing in the metal pipe Conventionally, soft polyvinyl chloride has been necessary and sufficient as a coating material for the above, but as described above, as a result of the operation of the cooling and heating system exceeding the normal heat-resistant temperature of soft polyvinyl chloride, the soft polyvinyl chloride is converted into a plasticizer. As described above, there is a high possibility that the pipe support or the metal pipe is corroded due to elution.

  Under such circumstances, the applicant has started a research study to select a new coating material. To the best of the applicant's knowledge, a resin other than soft polyvinyl chloride is originally used as a material for the coating material, such as a hanging band or a stand. There is no example adopted for the band, and it is not sold as a product.

  In addition, in order to assure the heat resistance and electrical insulation of resin other than soft polyvinyl chloride, and to investigate the case where it was used as a covering material for pipe supporters that support hot water supply pipes, Prior patent search was conducted.

(a) Search method: JPO Digital Library
(b) Subject of investigation;
(c) logical expression;
Full text of the gazette; (corrosion or electric corrosion or electric corrosion) and (covering or coating or coating) and (hot water or hot water) and heat IPC; F16L 3 /
As a result of the investigation, the following 5 items were hit.
JP2008-196692 Piping support and pad used for it JP2005-016662 Piping water leakage prevention method JP2001-304458 High density polystyrene foam heat insulation support for piping JP11-153261 07-293786 Tube insulation

  However, none of the above five documents discloses anything other than soft polyvinyl chloride as a covering material for a pipe support. Therefore, the present applicant has sought a new coating material and has come up with the above-described second invention.

The whole perspective view which showed the suspension band 1 which concerns on 1st Embodiment with the connector 5. FIG. It is the figure which showed the suspension band 1 which concerns on 1st Embodiment, (a) is sectional drawing which follows an AA line, (b) is sectional drawing which follows a BB line. The figure which showed the effect | action of the hanging band. Sectional drawing which showed the suspension band 22 which concerns on a modification. The whole perspective view which showed the standing band 31 which concerns on a modification. The whole perspective view which showed the suspension band 41 which concerns on 2nd Embodiment with the connector 5. FIG. It is the figure which showed the suspension band 41 which concerns on 2nd Embodiment, (a) is sectional drawing which follows CC line, (b) is sectional drawing which follows DD line. The figure which showed the effect | action of the hanging band. Sectional drawing which showed the suspension band 52 which concerns on a modification.

  Hereinafter, embodiments of a pipe support according to the present invention will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is an overall perspective view showing a suspension band 1 as a pipe support according to the present embodiment together with a connector 5, and FIG. 2 is a sectional view of the suspension band 1. As can be seen from these drawings, the suspension band 1 according to the present embodiment includes a pipe insertion portion 2 that is formed in an annular shape so that the open ends thereof are opposed to each other, and a radial direction from each open end of the pipe insertion portion. A suspension bolt, which is composed of a pair of extending connecting portions 3 and 3 facing each other, passes the resin pipe 7 through the pipe insertion portion 2 at a side running position, and is attached to the lower surface of the upper floor slab A connector 5 is connected to a connector (not shown), and a lower end 6 of the connector is sandwiched between a pair of connecting portions 3 and 3, and bolts 8 are inserted into bolt insertion holes 10 and 10 formed in the connecting portion. And the resin tube 7 can be suspended from the upper floor slab.

  The suspension band 1 is formed by bending the strip-shaped steel plate 21 in an annular shape to make the curved portion a pipe insertion portion 2, and bending each end portion of the strip-shaped steel plate 21 outwardly so as to face each other. The portion is a pair of connecting portions 3 and 3.

  A cross-sectional defect region 11 is formed on the side of the pipe insertion portion 2 opposite to the side where the pair of connecting portions 3 and 3 are arranged, and a non-cross-sectional defect region extending on both sides of the cross-sectional defect region. 12 and 12 are respectively provided with ribs 13 along the circumferential direction.

  The cross-sectional defect region 11 is formed by forming a rectangular opening 14 in the vicinity of the center along the width direction of the strip-shaped steel plate 21 and leaving the bridges 15 and 15 on both sides of the rectangular opening. , 15) is formed smaller than the cross-sectional width of the non-cross-sectional defect region 12.

  In order to suspend the resin pipe 7 from the upper floor slab using the suspension band 1 according to the present embodiment, first, a force is applied outward by holding the vicinity of the connecting portions 3 and 3 by hand.

  In this way, a bending moment is generated in the pipe insertion portion 2 by the force applied in the opening and closing direction, but the bending rigidity in the cross-sectional defect region 11 is significantly smaller than the non-cross-sectional defect regions 12 and 12. Since it is configured, a large bending deformation occurs in the cross-sectional defect region 11.

  As a result, as shown in FIG. 3, the pipe insertion portion 2 rotates around the cross-sectional defect region 11, and the gap between the connecting portions 3 and 3 widens, so that the resin pipe 7 is inserted from the gap.

  If the resin tube 7 has been inserted, next, a force is applied in the direction of closing the pipe insertion portion 2.

  If it does in this way, a big bending deformation will generate | occur | produce also in the cross-sectional defect | deletion area | region 11, the piping penetration part 2 will rotate to a reverse direction centering on the cross-section defect | deletion area | region 11, and the connection parts 3 and 3 will adjoin and it will be in the original opposing position Since the connection tool 5 is connected to a suspension bolt (not shown) attached to the lower surface of the upper floor slab, the lower end 6 of the connection tool is sandwiched between the pair of connection parts 3 and 3. The resin pipe 7 is suspended from the upper floor slab by inserting the bolt 8 into the bolt insertion holes 10, 10 formed in the connecting portion and tightening the bolt 8 with the nut 9.

  As described above, according to the suspension band 1 according to the present embodiment, the cross-sectional defect region 11 is formed on the side opposite to the side where the pair of connecting portions 3 and 3 are arranged in the pipe insertion portion 2. Since the ribs 13 along the circumferential direction are respectively provided in the non-cross-sectional defect regions 12 and 12 extending on both sides of the cross-sectional defect region, the pipe insertion part 2 has the non-cross-sectional defect region on both sides of the cross-sectional defect region 11. 12 extends, and a large difference in bending rigidity occurs between the cross-sectional defect region 11 and the non-cross-sectional defect region 12.

  Therefore, the bending moment generated by the force applied in the opening / closing direction of the pipe insertion portion 2 causes a large bending deformation at the cross-sectional defect region 11.

  That is, the bending rigidity distribution along the circumferential direction of the pipe insertion portion 2 is greatly reduced at the location of the cross-sectional defect region 11 due to the decrease in the bending rigidity due to the bridges 15 and 15 and the increase in the bending rigidity due to the ribs 13 and 13. Even if it is not adopted, it is possible to reliably rotate the pipe insertion portion 2 below, that is, in the cross-sectional defect region 11, so that the same function as the hinge structure can be realized at a low cost, and the rotational center position is clear. Therefore, the design of the suspension band 1 is facilitated.

  Moreover, since there is no part which protrudes outward like a hinge structure, the workability | operativity at the time of winding a heat insulating material improves markedly.

  In the present embodiment, the suspension band 1 is described as being attached to the lower surface of the upper floor slab, but it may be attached to the ceiling surface instead.

  Although not particularly mentioned in the present embodiment, as shown in FIG. 4, a suspension band 22 may be provided in which notches 23 and 23 are provided at substantially opposite positions in the center of the bridges 15 and 15, respectively. .

  According to this configuration, the cross-sectional area is further reduced at the locations where the notches 23 and 23 are provided, and the pipe insertion portion 2 is reliably rotationally deformed around the locations where the notches 23 and 23 are formed.

  Therefore, when the pipe insertion part 2 is opened and closed, a twist is generated, that is, the opening and closing surfaces are not on the same cross section and a difference occurs and the bridges 15 and 15 are twisted. Thus, either one of the bridges 15 and 15 is avoided. It is possible to prevent an excessive tensile stress from being generated.

  In this embodiment, the pipe support according to the present invention is the suspension band 1 that can be applied to a laterally-running pipe. However, instead of this, it can be a standing band. It can also be applied to tubes.

  FIG. 5 is an overall perspective view showing a standing band 31 according to a modification. As shown in the figure, the standing band 31 has a pipe insertion portion 32 that is formed in an annular shape so that the open ends thereof are opposed to each other, and each of the standing bands 31 that extend in the radial direction from each end of the pipe insertion portion. The resin pipe 7 is inserted into the pipe insertion part 32 at the rising position, and the tip of a connection tool (not shown) attached to the wall surface is connected to the pair of connection parts. The resin tube 7 can be fixed to the wall by being inserted between the bolts 33 and 33 and inserted into the bolt insertion holes 10 and 10 formed in the connecting portion and tightened with the nut 9. .

  As with the suspension band 1, the standing band 31 is formed by bending the strip steel plate 21 into an annular shape so that the curved portion serves as a pipe insertion portion 32, and each end of the strip steel plate 21 is bent outward to face each other. Thus, the bent portions are used as a pair of connecting portions 33 and 33.

  In addition, a cross-sectional defect region 11 is formed on the side of the pipe insertion portion 32 opposite to the side on which the pair of connecting portions 33 and 33 are disposed, and a non-cross section that extends to both sides of the cross-sectional defect region, respectively. The defect regions 12 and 12 are respectively provided with ribs 13 along the circumferential direction, and the cross-sectional defect region 11 forms a rectangular opening 14 near the center along the width direction of the strip-shaped steel plate 21, By leaving the bridges 15, 15 on both sides, the cross-sectional width of the cross-sectional defect region 11 (the total width of the bridges 15, 15) is made smaller than the cross-sectional width of the non-cross-sectional defect region 12.

  Hereinafter, the detailed configuration of the standing band 31, the operation effect thereof, and the modification thereof are the same as those of the suspension band 1 according to the above-described embodiment, and thus the detailed description thereof is omitted here.

(Verification test)
A tensile test was performed on the hanging band 1. In carrying out the tensile test, the suspension band 1 is adjusted so that the plate thickness is 0.6 mm, the plate width is 25 mm, the diameter of the adaptive piping is 28.58 mm, the opening width of the rectangular opening is 8 mm, and the opening length is 9 mm. This was used as a test specimen, and a conventional hinge-type suspension band having the same shape and no opening was used as a comparative test specimen.

  In the tensile test, a pipe having a length of about 50 cm is inserted into the pipe insertion portion 2 so as to be in a horizontal posture and the center thereof is suspended by a test body, and both ends of the pipe are respectively connected to the floor via two wires. In this state, a tensile load was applied to the connecting portions 3 and 3 of the test body, and the breaking property and the breaking load at that time were examined. A similar tensile test was also performed on the comparative specimen.

  As a result of the test, none of the base metal breaks, and in the conventional hinge type suspension band which is a comparative test body, the hinge portion breaks, whereas in the suspension band 1 which is the test body, the locations of the connecting parts 3 and 3 Was found to break. The breaking load was about 5.9 kN for the comparative specimen and about 6.4 kN for the specimen.

  As a result, the suspension band 1 according to the present embodiment has a sufficient margin in the base material, so that even if the rectangular opening 14 is provided, the bridges 15 and 15 are not damaged, exceeding the conventional hinge-type suspension band. It was found to have tensile strength.

(Second Embodiment)
Next, an embodiment of a pipe support according to the second embodiment will be described.

  FIG. 6 is an overall perspective view showing the suspension band 41 as a pipe support tool according to the present embodiment together with the connector 5, and FIG. 7 is a cross-sectional view of the suspension band 41. As can be seen from these drawings, the suspension band 41 according to this embodiment includes a pipe insertion portion 42 that is formed in an annular shape so that the open ends thereof are opposed to each other, and a radial direction from each open end of the pipe insertion portion. It is composed of a pair of connecting portions 3 and 3 which are extended to face each other, and the stainless steel pipe 7 'is inserted into the pipe insertion portion 42 at a lateral running location and attached to the lower surface of the upper floor slab. The connecting tool 5 is connected to a bolt (not shown), the lower end 6 of the connecting tool is sandwiched between the pair of connecting parts 3, 3, and the bolt is inserted into the bolt insertion holes 10, 10 formed in the connecting part. The stainless steel pipe 7 ′ can be suspended from the upper floor slab by inserting 8 and tightening with the nut 9.

  For example, the stainless steel pipe 7 ′ is made of austenitic stainless steel.

  The pipe insertion portion 42 includes a metal main body 51 and an electric insulator 52 covered with the metal main body, and the electric insulator is formed of a fluororesin.

  The fluororesin can be composed of, for example, polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) or tetrafluoroethylene / ethylene copolymer (ETFE). (Registered trademark) "sold by Asahi Glass Co., Ltd., or" Teflon (registered trademark) "sold by DuPont Co., Ltd. can be used.

  The suspension band 41 is formed by, for example, forming a strip-shaped steel plate 21 'formed of ferritic stainless steel in an annular shape so that the curved portion serves as a metal body 51, and each end of the strip-shaped steel plate 21' is bent outward. Thus, the bent portions may be formed as a pair of connecting portions 3 'and 3'.

  A cross-sectional defect region 11 is formed on the side of the metal body 51 opposite to the side where the pair of connecting portions 3 ′ and 3 ′ are disposed, and non-cross-sectional defects extending on both sides of the cross-sectional defect region, respectively. In the regions 12 and 12, ribs 13 are provided along the circumferential direction.

  The cross-sectional defect region 11 is formed by forming a rectangular opening 14 in the vicinity of the center along the width direction of the strip-shaped steel plate 21 ′ and leaving bridges 15, 15 on both sides of the rectangular opening. 15 (total width of 15) is formed smaller than the cross-sectional width of the non-cross-sectional defect region 12.

  The electric insulator 52 made of fluororesin is coated on the entire surface of the metal main body 51 by, for example, electrostatic powder coating so that the outer surface or inner surface of the rib 13 or the opening edge of the rectangular opening 14 is not exposed. .

  In order to suspend the stainless steel pipe 7 ′ from the upper floor slab using the suspending band 41 according to the present embodiment, first, a force is applied outward by holding the vicinity of the connecting portions 3 ′ and 3 ′ by hand.

  In this way, a bending moment is generated in the pipe insertion portion 42 by the force applied in the opening and closing direction, but the bending rigidity in the cross-sectional defect region 11 is significantly smaller than the non-cross-sectional defect regions 12 and 12. Since it is configured, a large bending deformation occurs in the cross-sectional defect region 11.

  As a result, as shown in FIG. 8, the pipe insertion portion 42 rotates around the cross-sectional defect region 11, and the gap between the connecting portions 3 ′ and 3 ′ expands, so that the stainless steel pipe 7 ′ is inserted from the gap.

  Here, since the rotational deformation around the cross-sectional defect region 11 described above is not a local deformation as in the conventional hinge structure, the forced deformation reaching the electrical insulator 52 covered with the metal body 51 is slight. Therefore, there is no concern that the fluororesin will crack.

  Once the stainless steel pipe 7 ′ has been inserted into the pipe insertion part 42, a force is then applied in the direction of closing the pipe insertion part 42.

  If it does in this way, a big bending deformation | transformation will generate | occur | produce also in the cross-sectional defect | deletion area | region 11, and the piping insertion part 42 will rotate to a reverse direction centering on the cross-sectional defect | deletion area | region 11, and connection part 3 ', 3' will adjoin and it will be original Since it returns to the facing position, the connecting tool 5 is connected to a suspension bolt (not shown) attached to the lower surface of the upper floor slab, and the lower end 6 of the connecting tool is connected between the pair of connecting parts 3 'and 3'. Further, the stainless steel pipe 7 ′ is suspended from the upper floor slab by inserting the bolt 8 into the bolt insertion holes 10, 10 formed in the connecting portion and tightening with the nut 9.

  In the suspension band 41 according to the present embodiment, the pipe insertion portion 42 includes a metal main body 51 and an electric insulator 52 covered with the metal main body, and the electric insulator is formed of a fluororesin. The electric insulator 52 has high heat resistance and prevents the metal main body 51 and the stainless steel pipe 7 'from being in contact with different metals.

  That is, the normal heat-resistant temperature of polyvinyl chloride is said to be “60 to 80 ° C.” (“Main Plastic Properties and Applications”, Japan Plastic Industry Federation, website). When formed from tetrafluoroethylene / ethylene copolymer (ETFE), it can be used continuously at 180 ° C (Asahi Glass Co., Ltd. website), and its heat resistance is much higher than that of soft polyvinyl chloride. .

  As described above, according to the suspension band 41 according to the present embodiment, the cross-sectional defect region 11 is formed on the side of the metal main body 51 opposite to the side where the pair of connecting portions 3 ′ and 3 ′ are disposed. In addition, since the ribs 13 are provided along the circumferential direction in the non-cross-sectional defect regions 12 and 12 extending on both sides of the cross-sectional defect region, the pipe insertion portion 42 has a non-cross-sectional defect on both sides of the cross-sectional defect region 11. Each of the regions 12 extends, and a large difference in bending rigidity occurs between the cross-sectional defect region 11 and the non-cross-sectional defect region 12.

  Therefore, the bending moment generated by the force applied in the opening / closing direction of the pipe insertion portion 42 causes a large bending deformation at the cross-sectional defect region 11.

  That is, the bending stiffness distribution along the circumferential direction of the pipe insertion portion 42 is significantly reduced at the location of the cross-sectional defect region 11 due to the decrease in the bending stiffness due to the bridges 15 and 15 and the increase in the bending stiffness due to the ribs 13 and 13, thus the hinge structure. Even if it is not adopted, it is possible to reliably rotate the pipe insertion portion 42 below, that is, in the cross-sectional defect region 11, so that the same function as the hinge structure can be realized at low cost, and the rotation center position is clear. Therefore, the design of the suspension band 41 is also facilitated.

  Moreover, since there is no part which protrudes outward like a hinge structure, the workability | operativity at the time of winding a heat insulating material improves markedly.

  In addition, in the case of the hinge structure, local deformation occurs in the vicinity of the pin. Therefore, the electrical insulator covering the hinge structure needs to be a material having flexibility enough to follow the local deformation, Therefore, it is necessary to select a material such as soft polyvinyl chloride, but according to the pipe support 41 according to the present embodiment, the pipe insertion portion is formed by a gentle bending deformation over the circumferential length of the cross-sectional defect region 11. Since 42 opens and closes, even if the material is harder than soft polyvinyl chloride, there is no concern of damaging the electrical insulator.

  Therefore, the electrical insulator 52 made of a fluororesin can reliably exhibit an electrical insulation effect in a high temperature environment as will be described later without being affected by the opening / closing operation of the pipe insertion portion 42.

  Further, according to the suspension band 41 according to the present embodiment, the pipe insertion portion 42 is constituted by the metal main body 51 and the electric insulator 52 covered with the metal main body, and the electric insulator is made of a fluororesin. Even if the hot water supply temperature is increased by adopting energy efficient air conditioning systems such as cogeneration and Ecocute (registered trademark), the electrical insulator 52 can withstand the hot water temperature with sufficient heat resistance. In addition, even if there is an unexpected temperature rise, there is no possibility of the plasticizer eluting or the generation of hydrogen chloride gas unlike soft polyvinyl chloride.

  Therefore, it is possible to reliably prevent the corrosion of the stainless steel pipe 7 ′ at the suspension band 41 and its supporting portion.

  In the present embodiment, the suspension band 1 is described as being attached to the lower surface of the upper floor slab, but it may be attached to the ceiling surface instead.

  Although not specifically mentioned in the present embodiment, as shown in FIG. 9, a suspension band 54 may be provided in which notches 53 and 53 are provided at positions substantially opposite the centers of the bridges 15 and 15, respectively. .

  According to this configuration, the cross-sectional area is further reduced at the location where the notches 53 and 53 are provided, and the pipe insertion portion 2 is reliably rotationally deformed around the location where the notches 53 and 53 are formed.

  Therefore, when the pipe insertion part 2 is opened and closed, a twist is generated, that is, the opening and closing surfaces are not on the same cross section and a difference occurs and the bridges 15 and 15 are twisted. Thus, either one of the bridges 15 and 15 is avoided. It is possible to prevent an excessive tensile stress from being generated.

  In the present embodiment, the pipe support according to the present invention is a suspension band 1 applicable to a laterally-running pipe. However, as in the first embodiment, it is possible to use a standing band instead of the suspension band. Yes, this configuration can also be applied to risers.

  The configuration of the standing band is substantially the same as that of the suspension band 41 according to the above-described embodiment except that the number of the bolt insertion holes 10 is two instead of one, and the operational effects are also the same. Therefore, detailed description thereof is omitted here.

  In the present embodiment, the inner peripheral surface and the outer peripheral surface of the metal main body 51 are coated with fluororesin to form the electric insulator 52. However, the electric insulator is in contact with the stainless steel tube 7 'that is a metal tube. That is, it is sufficient that only the inner peripheral surface of the metal main body 51 is covered, and the outer peripheral surface may be omitted.

  In this embodiment, the metal insulator 51 is coated with the electrical insulator 52 made of a fluororesin. Instead, the metal body 51 may be coated with an electrical insulator made of acrylic resin. Good.

  A typical example of the acrylic resin is polymethylmethacrylate (PMMA). In this embodiment, the acrylic resin is configured such that its normal heat resistant temperature is 90 ° C. or higher.

  Acrylic resins generally have a normal heat-resistant temperature of "70 to 90 ° C" ("Main Plastic Properties and Applications", Japan Plastics Industry Federation, website). What is necessary is just to modify | reform suitably by a well-known method, such as making it copolymerize with a monomer.

  In addition, since it is substantially the same as that of the above-mentioned embodiment demonstrated about the fluororesin about the other structure and its effect when using acrylic resin instead of a fluororesin as an electrical insulator, the description is abbreviate | omitted here. .

1,22,41,54 Suspension band (Piping support)
2,32,42 Pipe insertion part 3,33,3 'connection part 5 connection tool 6 lower end of connection tool 7 7 resin pipe 7' stainless steel pipe (metal pipe)
DESCRIPTION OF SYMBOLS 11 Cross-sectional defect | deletion area | region 12 Non-cross-section defect | deletion area | region 13 Rib 14 Rectangular opening 15 Bridge 23,53 Notch 31 Standing band (pipe support tool)
51 Metal body 52 Electrical insulator

Claims (9)

A pipe insertion portion configured to be annularly curved so that the open ends face each other, and a pipe can be inserted therethrough, and a pair facing each other extending in a radial direction from each open end of the pipe insertion portion The lower end of the connecting tool fixed to the ceiling surface or the lower surface of the upper floor slab between the pair of connecting parts, or the front end of the connecting tool fixed to the wall surface to be bolted In the pipe support that can hold the pipe inserted through the pipe insertion part,
Of the pipe insertion portion, a cross-sectional defect region is formed on a side opposite to the side where the pair of connecting portions are disposed, and a rib extending along the circumferential direction is formed on a non-cross-sectional defect region extending on both sides of the cross-sectional defect region. Piping supports characterized by being provided respectively. The pipe support according to claim 1, wherein the cross-sectional defect region is configured by a bridge having a cross-sectional width narrower than that of the non-cross-sectional defect region. The pipe support according to claim 2, wherein a rectangular opening is formed in the vicinity of the center along the width direction of the pipe insertion portion, and the portions remaining on both sides of the rectangular opening are used as the bridge. The piping support according to claim 3, wherein a notch is provided at a position substantially in the center of each bridge and facing each other. Pipe insertion portions that are formed in an annular shape so that the open ends face each other and a metal tube can be inserted inside the pipe insertion portions, and the pipe insertion portions that extend in the radial direction from the respective open ends of the pipe insertion portions face each other. It consists of a pair of connecting parts, and sandwiches the lower end of the connecting tool fixed to the ceiling surface or the lower surface of the upper floor slab between the pair of connecting parts, or inserts the tip of the connecting tool fixed to the wall surface to join the bolts. By this, in the pipe support that can hold the metal pipe inserted through the pipe insertion part,
The pipe insertion portion is composed of a metal main body and an electric insulator coated on at least the inner peripheral surface of the metal main body, and the electric insulator is made of a fluororesin or an acrylic resin having a normal heat resistant temperature of 90 ° C. or more. Forming a cross-sectional defect region on a side of the metal body opposite to the side on which the pair of connecting portions are disposed, and extending along a non-cross-sectional defect region extending on both sides of the cross-sectional defect region along the circumferential direction. A pipe support having a rib. The electrical insulator is formed of a fluororesin, and the fluororesin is made of polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) or tetrafluoroethylene / ethylene copolymer (ETFE). The pipe support according to claim 5. The pipe support according to claim 5 or 6, wherein the cross-sectional defect region is constituted by a bridge having a cross-sectional width narrower than that of the non-cross-sectional defect region. The pipe support according to claim 7, wherein a rectangular opening is formed in the vicinity of the center along the width direction of the pipe insertion part, and portions remaining on both sides of the rectangular opening are used as the bridge. The pipe support according to claim 8, wherein a notch is provided at a position substantially in the center of each bridge and facing each other.

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