Piping supports

Abstract

To provide a piping support tool which is easy in the insertion of piping into a support part, and favorable in construction performance.SOLUTION: A piping support tool 10 comprises: a tongue buckle 20 attached to a construction, and having fastening pieces 22, 23 extending downward; a support metal fixture 30 having a support part 33 formed by annularly curving an intermediate part of a band-shaped steel plate, for supporting a peripheral face 90a of a VP pipe 90 and suspension parts 31, 32 formed by annularly bending both end parts of the steel plate outward, and attached to the outside of the fastening pieces 22, 23; a spacer 40 provided inside the fastening pieces 22, 23; a bolt 50 penetrating the fastening pieces 22, 23, the suspension parts 31, 32 and the spacer 40: and a nut 60 for fastening the fastening pieces 22, 23 and the suspension parts 31, 32 together with the bolt 50. The tongue buckle 20, the support metal fixture 30 and the spacer 40 are deformed at time of fastening, and an interval between bent parts 34, 35 which are formed between the support part 33 and the suspension parts 31, 32 is equal to or larger than 9 mm before the deformation of the support metal fixture 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pipe support that is attached to a structure such as a building to support pipes. [Background technology]

[0002] As a pipe support device that is attached to a structure such as a building (as defined in the "Fundamentals of Design for Civil Engineering and Architecture" (Ministry of Land, Infrastructure, Transport and Tourism), in this application, "structure" is used as "something that has a desired function and is artificially constructed with the intention of resisting action") to support pipes, there is, for example, a pipe support device used in the pipe support structure described in Patent Document 1.

[0003] This pipe support structure comprises a pipe support (hanging member) that is split into halves with an inner surface that conforms to the circumferential surface of the pipe, and has first and second holding parts that are rotatably connected to each other via a hinge, and vibration-damping rubber attached to the first and second holding parts of the pipe support, and holds the pipe with the first and second holding parts via the vibration-damping rubber, thereby suspending and supporting the pipe from the ceiling.The mounting piece of the first holding part and the mounting piece of the second holding part are attached to the outside of a pair of opposing pieces (mounted parts) of the turn buckle (hanging part) that constitutes the pipe support with bolts and nuts, and a gasket through which the bolt is inserted is provided on the inside of the pair of opposing pieces. [Prior art documents] [Non-patent literature]

[0004] [Patent Document 1] Patent Publication No. 2018-204773 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the pipe support described in Patent Document 1 supports pipes via vibration-isolating rubber, but when the pipe support directly supports VP pipes (PVC pipes, hard polyvinyl chloride pipes) or the like with an annular support part (in Patent Document 1, the support part is made up of a first holding part and a second holding part), without using vibration-isolating rubber, the mainstream construction method is to insert the pipe into the support part without removing the nuts from the bolts. However, in this case, the pipe and the support part get caught, making it difficult to insert the pipe, making it difficult to move the pipe after insertion, and causing problems such as damage to the pipe.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe support that is easy to insert into a pipe support portion and has good workability. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a pipe support comprising: a metal turnbuckle having a base that is attached to a structure and a pair of opposing pieces extending downward from the base; a support bracket having a support portion formed by a band-shaped metal plate with the middle portion curved into an annular shape and supporting the peripheral surface of the pipe; and a pair of mounting portions formed by both ends of the metal plate bent outwardly of the annular shape and attached to the outside of the pair of opposing pieces; elastically deformable spacers provided on the inside of the pair of opposing pieces; bolts that pass through insertion holes formed in the pair of opposing pieces, the pair of mounting portions, and the spacer; and nuts that thread onto the bolts and fasten the pair of opposing pieces and the pair of mounting portions together with the bolts, wherein the turnbuckle, the support bracket, and the spacer deform when fastened by the bolts and the nuts, and the distance between the pair of bent portions formed between the support portion of the support bracket and the pair of mounting portions is 9 mm or more before the support bracket deforms.

[0008] The spacer is preferably made of ethylene vinyl acetate copolymer, and the bolt may be provided with a retaining portion that prevents the nut from coming off. [Effects of the Invention]

[0009] According to the present invention, the pipe can be easily inserted into the support member, improving workability. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an explanatory diagram showing a pipe support according to an embodiment of the invention; [Figure 2] FIG. 1A is a perspective view showing a testing device for a pipe support, and FIG. 1B is an explanatory diagram showing a testing method for a pipe support using the testing device of FIG. [Figure 3] FIG. 3 is an explanatory diagram showing test results obtained by the test device of FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

[0012] As shown in FIG. 1, the piping support 10 according to this embodiment is used to suspend VP pipes 90 for building facilities, and includes a turn buckle 20 attached to a suspension bolt (not shown) whose upper end is fixed to the ceiling slab or the like of the building, a support bracket 30 attached to the turn buckle 20, a spacer 40 provided between a pair of fastening pieces 22, 23 of the turn buckle 20 (described later), and a bolt 50 and a nut 60 for fastening (fastening) the turn buckle 20, the support bracket 30, and the spacer 40 together.

[0013] Turnbuckle 20 is made by pressing a strip of steel plate and has base 21 that is rectangular in plan view, and a pair of fastening pieces 22, 23 that extend downward from base 21 and are elastically deformable relative to base 21. An insertion hole 21a is formed in the center of base 21, into which a rotating nut 24 that threads onto a suspension bolt is inserted. A flange 24a with a larger diameter than insertion hole 21a is formed at the bottom of rotating nut 24, and when rotating nut 24 is threaded onto the suspension bolt, flange 24a supports the periphery of insertion hole 21a of base 21 from below, and base 21 is attached to a structure via the suspension bolt.

[0014] The fastening piece 22 has a first internode 22a extending downward from the left edge of the base 21 approximately perpendicular to the base 21, a second internode 22b extending obliquely from the lower edge of the first internode 22a toward the fastening piece 23, and an overlapping portion 22c extending further downward from the lower edge of the second internode 22b and overlapping with the hanging portion 31 of the support bracket 30 described later.

[0015] The fastening piece 23 has a first internode 23a extending downward from the right edge of the base 21 approximately perpendicular to the base 21, a second internode 23b extending obliquely from the lower edge of the first internode 23a toward the fastening piece 22, and an overlapping portion 23c extending further downward from the lower edge of the second internode 23b and overlapping with the hanging portion 32 of the support bracket 30 described later.

[0016] First internode 22a and first internode 23a are formed with retaining portions 22d and 23d that stand upright below rotating nut 24 to prevent rotating nut 24 from falling out of insertion hole 21a. Additionally, overlapping portions 22c and 23c are formed with circular insertion holes 22e and 23e through which shank 51 of bolt 50, described later, is inserted.

[0017] The support bracket 30 is made by pressing a strip-shaped steel plate, and has a pair of hanging portions 31, 32 that overlap and abut against the overlapping portions 22c, 23c of the pair of fastening pieces 22, 23, and a ring-shaped support portion 33 that is provided below the hanging portions 31, 32 and supports the peripheral surface 90a of the VP pipe 90.

[0018] Hanging portions 31 and 32 are formed by bending both ends of a steel plate toward the outside of the annular shape of support portion 33, and each has a generally rectangular flat plate shape in side view. Circular insertion holes 31a and 32a are formed in hanging portions 31 and 32, through which shank 51 of bolt 50 is inserted. When bolt 50 and nut 60 are not tightened and the elastic force of fastening pieces 22 and 23 acts from the inside of hanging portions 31 and 32, the distance between hanging portions 31 and 32 is maintained in accordance with the elastic force.

[0019] The support portion 33 is formed by bending the middle portion of a steel plate into an annular shape, and is formed so as to deform into an annular shape with a diameter that is the same as or approximately the same as the outer diameter of the VP pipe 90 when the turnbuckle 20 and the support bracket 30 are fastened with the bolts 50 and nuts 60. However, in the pre-deformed state when the bolts 50 and nuts 60 are not tightened, the support portion 33 assumes a shape in which the annular shape widens according to the distance between the suspending portion 31 and the suspending portion 32, and the distance between the pair of bent portions 34, 35 formed between the support portion 33 and the pair of suspending portions 31, 32 is 9 mm or more, ensuring a gap 80 between the support portion 33 and the peripheral surface 90a of the VP pipe 90 inserted into the support portion 33.

[0020] The spacer 40 is made of a disk-shaped or cylindrical EVA (ethylene vinyl acetate copolymer), and has a circular insertion hole 40a formed in the center of the circle through which the shank 51 of the bolt 50 passes. The spacer 40 has a thickness of 9 mm or more in the opposing direction of the fastening pieces 22, 23 (but this thickness is equal to or less than the distance between the pair of bent portions 34, 35) so as to prevent the fastening pieces 22, 23 from approaching each other and to form a sufficient gap between the peripheral surface 90a of the VP pipe 90 and the support portion 33 before the turn buckle 20 and the support bracket 30 are fastened with the bolt 50 and nut 60. Meanwhile, when the turn buckle 20 and the support bracket 30 are fastened with the bolt 50 and nut 60, the spacer 40 is compressed from the left and right by the fastening pieces 22 and 23, and is deformed so as to reduce its thickness.

[0021] The bolt 50 has a shaft 51 with threads formed around it that is inserted through the insertion hole 31a of the hanging portion 31, the insertion hole 22e of the fastening piece 22, the insertion hole 40a of the spacer 40, the insertion hole 23e of the fastening piece 23, and the insertion hole 32a of the hanging portion 32, in that order, and the head 52 abuts against the hanging portion 31. The nut 60 is threadedly engaged with the portion of the shaft 51 that protrudes from the insertion hole 32a. The shaft 51 of the bolt 50 is provided with a retaining portion (not shown) whose threaded surface is processed irregularly to prevent the nut 60 from coming off.

[0022] The VP pipe 90 is inserted into the support part 33, which has an expanded circular ring shape, with the bolts 50 and nuts 60 not tightened.Then, by tightening the bolts 50 and nuts 60 with the specified torque, the turn buckle 20 and support fitting 30 (fastening pieces 22, 23 and hanging parts 31, 32) are fastened together, and when fastening is complete, the spacer 40 is deformed so thin that its existence is not noticeable at first glance.

[0023] The pipe support 10 according to this embodiment includes a metal turnbuckle 20 having a base 21 attached to a structure and a pair of fastening pieces 22, 23 extending downward from the base 21, a support part 30 formed by bending the middle part of a strip-shaped steel plate into an annular shape and supporting the peripheral surface 90a of the VP pipe 90, and a support fitting 30 formed by bending both ends of the steel plate outward from the annular shape and having a pair of hanging parts 31, 32 attached to the outside of the pair of fastening pieces 22, 23, an elastically deformable spacer 40 provided inside the pair of fastening pieces 22, 23, and insertion holes 22e, 23e and insertion hole 31 formed in the fastening pieces 22, 23, the hanging parts 31, 32 and the spacer 40. a, 32a and through hole 40a, and a nut 60 that screws onto the bolt 50 and fastens the fastening pieces 22, 23 and hanging portions 31, 32 together with the bolt 50. The turn buckle 20, support bracket 30 and spacer 40 are deformed when fastened with the bolt 50 and nut 60, and the distance between a pair of bent portions 34, 35 formed between the support portion 33 of the support bracket 30 and the pair of hanging portions 31, 32 is 9 mm before the support bracket 30 is deformed, so that a gap 80 is formed between the peripheral surface 90a of the VP pipe 90 and the support portion 30, and the VP pipe 90 is less likely to get caught when inserted into the support portion 30 by an operator, making insertion easy and improving workability.

[0024] Furthermore, even if an external force acts on the piping support 10 during transportation, etc., the spacer 40, which has a thickness of 9 mm or more, prevents the pair of fastening pieces 22, 23 from coming closer together to a distance of less than 9 mm (thus preventing the pair of hanging portions 31, 32 from coming closer together and the support portion 33 from reducing in diameter), thereby securing a gap 80 between the peripheral surface 90a of the VP pipe 90 and the support portion 30, so that the worker is less likely to get caught when inserting the VP pipe 90 into the support portion 30, maintaining good workability.

[0025] This effect can be confirmed using a testing apparatus 100 shown in Fig. 2. The testing apparatus 100 includes a testing machine base 101, a long support beam 102 fixed to the testing machine base 101, a jig 104 erected on the testing machine base 101 and supporting a cylindrical member 103, and frames 105, 106 erected on the support beam 102 and from which a piping support 110 (including a piping support 10 in which the spacing between the pair of hanging portions 31, 32 and the thickness of the spacer 40 is 9 mm or more, and a piping support in which the spacing between the pair of hanging portions and the thickness of the spacer are less than 9 mm but other configurations are similar to that of the piping support 10) is suspended, and a VP pipe 90 having a diameter of 32 mm is inserted into the piping supports 110, 110 suspended from the frames 105, 106. This VP pipe 90 is connected to a testing machine 108 (Autograph AG-50knI manufactured by Shimadzu Corporation) by a fishing line 107, and is pulled by the testing machine 108 at a speed of 20 mm per minute.

[0026] Figure 3 shows the test results obtained using the test device 100. This figure shows the variations in the displacement of the VP pipe 90 and the tensile load when a tensile test was conducted on a pipe support 110 with the spacing between the pair of hanging parts set to 5 mm, 7 mm, 9 mm, 11 mm, and 13 mm. The tensile load increases when the VP pipe 90 becomes caught on the support part 33. The test results show that when the spacing between the fastening pieces 22 and 23 is 5 mm and 7 mm, the maximum load reaches approximately 0.016 kN, indicating that the VP pipe 90 is tightly caught on the support part 33. When the spacing between the fastening pieces 22 and 23 is 9 mm or greater, the maximum load remains at approximately 0.001 kN, indicating that catching is unlikely to occur.

[0027] Furthermore, in this embodiment, since the spacer 40 is made of EVA, the spacing between the fastening pieces 22, 23 can be maintained appropriately even if external forces are applied during transportation, etc., and during installation, the spacer 40 is significantly deformed and becomes thin (to the point where it is not noticeable at a glance), allowing the worker to easily recognize that the bolt 50 and nut 60 have been tightened.

[0028] Furthermore, in this embodiment, the bolt 50 is provided with a retaining portion that prevents the nut 60 from falling off, which prevents the nut 60 from falling off during construction, causing the worker to lose the nut or have to procure a replacement nut, thereby preventing a deterioration in construction efficiency.

[0029] Although the embodiments of the present invention have been described above as examples, the embodiments of the present invention are not limited to those described above, and may be modified as appropriate within the scope of the invention.

[0030] For example, in the above-described embodiment, the turn buckle and the support fittings are made of strip-shaped steel plate, but they may also be made of other metals with different shapes, and the material of the spacer is not limited to EVA. [Explanation of symbols]

[0031] 10 Piping support 20 Turnbuckle 21 Base 22 Fastening piece (opposing piece) 22e Insertion hole 23 Fastening piece (opposing piece) 23e Insertion hole 30 Support bracket 31 Hanging part (mounting part) 31a Insertion hole 32 Hanging part (mounting part) 32a Insertion hole 33 Support part 34 Bend 35 Bend 40 spacer 40a Insertion hole 50 volts 60 nuts 90 VP pipe (piping) 90a circumference

Claims

1. a metal turnbuckle having a base that is attached to a structure and a pair of opposing pieces that extend downward from the base; a support fitting having a support portion formed by a belt-shaped metal plate whose middle portion is curved into an annular shape and which supports the peripheral surface of the pipe, and a pair of mounting portions formed by both end portions of the metal plate being bent outwardly of the annular shape and which are attached to the outsides of the pair of opposing pieces; an elastically deformable spacer provided on the inner side of the pair of opposing plates; a bolt inserted through an insertion hole formed in each of the pair of opposing plates, the pair of mounting portions, and the spacer; a nut that is threaded onto the bolt and fastens the pair of opposing pieces and the pair of mounting portions together with the bolt, The turnbuckle, the support bracket, and the spacer are deformed when fastened by the bolt and the nut, and the distance between the pair of bent portions formed between the support portion of the support bracket and the pair of mounting portions is 9 mm or more before the support bracket is deformed, A piping support characterized in that the spacer has a thickness of 9 mm or more in the opposing direction of the pair of opposing pieces and less than the distance between the pair of bent portions before being fastened by the bolt and the nut.

2. 2. The pipe support according to claim 1, wherein the spacer is made of an ethylene vinyl acetate copolymer.

3. 3. The pipe support according to claim 1, wherein the bolt is provided with a retaining portion that prevents the nut from coming off.

Images