JP6537818B2 - Pipe fixing device - Google Patents

Description

  The present invention relates to a pipe fixing device for restraining and supporting a pipe.

  There is a pipe fixing device described in Patent Document 1 as a pipe fixing device that reduces stress at the time of fixing and further fixes more firmly. This apparatus comprises: a first holding member fixed to a supporting member for supporting a pipe; a second holding member for holding the pipe between the first holding member; and a bolt for fastening both holding members Prepare. The two gripping members are provided with gripping grooves for receiving the outer peripheral surface of the pipe, and the gripping grooves have contact portions respectively contacting the received pipe P at two different positions in the circumferential direction. The contact portions are respectively disposed on a pair of inclined surfaces from the side edges to the bottom of the grip groove. The inclined surface is formed on the curved surface of the outer bulge curving in a substantially arc shape in cross section. This device has four contact points with the pipe, reduces stress applied to the pipe, and reduces the load on the pipe while firmly fixing it.

JP, 2014-080998, A

In the above-mentioned conventional apparatus, in order to restrain the axial movement of the pipe and the rotation around the pipe axis, the pipe and the anchor band are enhanced by increasing the tightening strength of the bolt that fastens the upper and lower anchor band bodies. It is necessary to increase the friction force generated between them, but on the other hand, excessive stress is generated in the piping, the load load on the piping is increased, and there is a limit in fixing the piping by bolt tightening, Secure fixing is difficult.
Then, the invention concerning this application makes it a subject to improve restraint strength which controls axial displacement of piping, and rotation displacement around an axis, without excessive stress and modification of piping by clamping upper and lower gripping members.

In order to solve the above problems, in the invention according to this application, the pipe P is sandwiched between the first gripping member 3 fixed to the support member 2 supporting the pipe P and the first gripping member 3 A piping fixing device 1 including a second holding member 4 and providing holding grooves 6 and 9 for receiving the outer peripheral surface of the pipe P on both holding members 3 and 4 and fastening both holding members 3 and 4 with a bolt 5 Configure The gripping groove 6 (9) is provided with deformation restricting portions D1, D2 in contact with the opposing portions in which the distance between the pipes P deformed by being sandwiched between both gripping members 3, 4 is enlarged.
The deformation restricting portions D1 and D2 are formed by overhanging surfaces 6c and 9c in the opposing direction of the two gripping members 3 and 4 of the gripping grooves 6 and 9, respectively.
The deformation control portions D1 and D2 are alternately arranged on both sides of the center boundary line B in the opposing direction of the two gripping members 3 and 4 in the pipe P.
The gripping grooves 6 and 9 are provided with contact portions C1 and C2 which respectively contact the received pipe P at two different places in the circumferential direction. The contact portions C1 and C2 are respectively disposed on a pair of inclined surfaces 6b and 9b from the side edges of the gripping groove toward the bottom.
The inclined surfaces 6 b and 9 b are formed on the curved surface of the outer bulge curving in a substantially arc shape in cross section.
The bottoms and edges of the gripping grooves 6 and 9 are formed in a substantially arc shape in cross section by cutting, and the contact portions C1 and C2 are formed by ridge lines that form the boundaries between the bottoms and the edges.
The gripping grooves 20 and 21 are formed in a groove having a pair of flat inclined surfaces and having a substantially triangular cross section.
Both gripping members 22 and 23 were formed of curved steel plates.
The first gripping member 3 and the second gripping member 4 are engaged with each other to prevent relative displacement of the second gripping member accompanying slippage of the first gripping member at the time of axial displacement of piping. The engaging portions 14 were provided respectively.

  According to the device of the invention according to this application, the joint portion of both gripping members sandwiches the pipe and the opposing portion in which the distance between the pipes is expanded contacts the deformation restricting portion, thereby suppressing the deformation of the pipe and the pipe The point of contact with the pipe can be increased, local stress to be applied to the pipe can be reduced, and load load to the pipe can be reduced, and piping restraint performance is stabilized, axial displacement and circumferential displacement of the pipe Also, a large contact resistance can be given to the moment about the central axis in the opposite direction of both gripping members, and the two can be fixed firmly.

It is a perspective view of piping fixing device of a 1st example concerning the present invention. It is a front view of the piping fixing device of FIG. It is a top view of the piping fixing device of FIG. (A) is a partial enlarged view of the piping fixing device before bolt tightening, (B) is a partial enlarged view of the piping fixing device in a bolt tightening state. It is a front view of the piping fixing device of 2nd Example. It is a front view of the piping fixing device of 3rd Example. It is a front view of the piping fixing device of a 4th example.

Embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 to 4, the pipe fixing device 1 is provided between the support member 2 for supporting the pipe P, the first holding member 3 fixed to the support member 2, and the first holding member 3. And a second holding member 4 which is tightened by a bolt 5 to the first holding member 3 with the pipe P interposed therebetween. Hereinafter, for the sake of convenience, the support member 2 side of the pipe P will be described as “downward” and the opposite side as “upper”, however, depending on the extension direction of the pipe, actual upward and downward do not necessarily coincide.

  The first holding member 3 is fixed to the supporting member 2 which is an existing supporting structure composed of a square pipe, an H-shaped steel material or the like by a known fixing method of screw water such as welding or bolt bonding. The first gripping member 3 is made of a rectangular steel material, and includes a gripping groove 6 for receiving approximately a half of the pipe P and a connecting portion 7 bolted to the second gripping member 4. The gripping groove 6 is formed of a bottom 6a having a substantially arc-shaped cross section curved to the outer side and a pair of inclined surfaces 6b having a substantially arc-shaped cross section curved to the outer side extending from the edge to the bottom 6a. The inclined surface 6b has a contact portion C1 with the pipe P. The connecting portion 7 is provided with four bolt holes 8 spaced in the axial direction in order to insert four bolts 5 in the direction opposite to the second holding member 4.

  The second gripping member 4 is made of a rectangular steel material, and is bolted to the first gripping member 3 with the gripping groove 9 facing the gripping groove 6 of the first gripping member 3 and receiving approximately half of the pipe P And a connecting portion 10. Similar to the gripping groove 6, the gripping groove 9 has a bottom portion 9a having a substantially arc-shaped cross section and a pair of inclined surfaces 9b having a substantially arc-shaped cross section and a curved portion directed to the bottom portion 9a. It is formed. The inclined surface 9 b has a contact portion C2 with the pipe P. The connecting portion 10 is provided with four bolt holes 11 spaced in the axial direction in order to insert four bolts 5 in the direction opposite to the first holding member 3.

  The opposing surfaces 12 and 13 on the left and right sides of the gripping grooves 6 and 9 are, as shown in FIG. 4, the center of the pipe P in the longitudinal direction with the pipe P sandwiched between the first and second gripping members 3 and 4 Are alternately positioned above and below the boundary line B of The gripping grooves 6 and 9 are provided with flat projecting surfaces 6 c and 9 c which are bent inward from the inclined surfaces 6 b and 9 b and which are substantially orthogonal to the boundary line B. The overhanging surfaces 6c and 9c have deformation restricting portions D1 and D2 that prevent the displacement of the expanding side ends of the pipe P by the pipe P being deformed by the sandwiching of the first and second holding members 3 and 4.

  The engaging portion 14 extending between the first and second gripping members 3 and 4 is engaged with the key grooves 15 and 16 formed on the facing surfaces 12 and 13, as shown in FIGS. And a mating engagement key 17. The key grooves 15 and 16 are provided in the central portion of the facing surfaces 12 and 13 in the direction orthogonal to the axis of the pipe P in a gripping state, and from the side surfaces of the first and second gripping members 3 and 4 near the gripping grooves 6 and 9 It ends at the position. The key 17 has a quadrangular prism shape so as to be inserted between the key grooves 15 and 16 in the coupled state of the first gripping member 3 and the second gripping member 4, and the tip is formed in a tapered arc shape There is.

  The pipe fixing device 1 sandwiches the pipe P vertically by the holding members 3 and 4 and fastens the bolt 5 with a prescribed torque, thereby deforming the pipe P and expanding the mutual distance between both ends of the overhang surface 6 c. , 9c prevent the deformation restriction portions D1, D2 and fix the pipe P while suppressing the deformation. Further, the gripping members 3, 4 contact the pipe P at the contact portions C1, C2 of the inclined surfaces 6b, 9b of the gripping grooves 6, 9, and the deformation restricting portions D1, D2 of the overhang surfaces 6c, 9c, respectively. For this reason, the piping P is substantially fixed at six places without the holding grooves 6 and 9 being in intimate contact with the outer peripheral surface of the piping P uniformly, and the piping P is compared as compared with the case where the upper and lower four places are in contact. It is possible to reduce local stress to be applied to the contact portion, and to give a large contact resistance to axial and circumferential displacement of the pipe P. Furthermore, it is possible to fix strongly against the moment around the axis which penetrates both the gripping members 3 and 4 up and down. After clamping the gripping members 3 and 4 with the bolt 5, inserting the key 17 into the key groove 15 and 16 prevents relative displacement between the gripping members 3 and 4 in the axial direction, and the pipe P is securely fixed.

  Another embodiment is shown in FIG. In the following, the same components as those of the previous embodiment are denoted by the same reference numerals and the description thereof is omitted. In the same figure, the inclined surfaces 18b and 19b of the gripping grooves 18 and 19 respectively scrape the edge and bottom portions 18b and 19b of the gripping grooves 18 and 19 into a circular arc shape in cross section to raise ridge lines that serve as boundaries and contact portions C1 and C2 are formed. The gripping grooves 18, 19 are provided with substantially vertical flat overhanging surfaces 18c, 19c that are bent inward from the inclined surfaces 18b, 19b, and the piping P by pinching of the first and second gripping members 3, 4 With respect to deformation, the deformation restricting portions D1 and D2 at both ends of the pipe P are formed.

  Another embodiment is shown in FIG. In the figure, the gripping grooves 20 and 21 are formed in a substantially triangular cross section, and the inclined surfaces 20 b and 21 b are flat surfaces, and have contact portions C1 and C2 at the nearest position of the pipe P received in the gripping grooves 20 and 21. The gripping grooves 20, 21 are provided with substantially vertical flat overhanging surfaces 20c, 21c that are bent inward from the inclined surfaces 20b, 21b, and the piping P by pinching of the first and second gripping members 3, 4 With respect to deformation, the deformation restricting portions D1 and D2 at both ends of the pipe P are formed.

  Another embodiment is shown in FIG. In the same figure, the first and second holding members 22 and 23 are made of a steel plate material whose intermediate portion is curved, and the bottom portions 24a and 25a of the holding grooves 24 and 25 are curved in a substantially arc shape in cross section 24b and 25b are formed as a substantially flat surface, and have contact portions C1 and C2 at a position close to the pipe P. The gripping grooves 24 and 25 are provided with substantially vertical flat overhanging surfaces 24c and 25c that are bent inward from the inclined surfaces 24b and 25b, and the piping P by pinching of the first and second gripping members 3 and 4 With respect to deformation, the deformation restricting portions D1 and D2 at both ends of the pipe P are formed.

DESCRIPTION OF SYMBOLS 1 Piping fixing device 2 Support member 3 First gripping member 4 Second gripping member 5 Bolt 6 Gripping groove 6a Bottom 6b Tilting surface 6c Overhanging surface 7 Connecting portion 8 Bolt hole 9 Gripping groove 9a Bottom 9b Tilting surface 9c Overhanging surface 10 Connection part 11 bolt hole 14 engagement part 15 key groove 16 key groove 17 engagement key 18 grip groove 18b slope surface 18b bottom surface 18c overhang surface 19 grip groove 19b slope surface 19b bottom 19c overhang surface 20 grip groove 20b slope surface 20c overhang surface 21 grip groove 21b sloped surface 21c deformation restricting portion 22 first grip member 23 second grip member 24 grip groove 24a bottom 24b sloped surface 24c overhang surface 25 grip groove 25a bottom 25b slope 25c overhang surface C1 contact portion C2 contact portion D1 Deformation control part D2 Deformation control part P Piping

Claims (3)

A first gripping member fixed to the support member, comprising a gripping groove for receiving a substantially semi-peripheral surface of the outer periphery of the pipe;
A second gripping member provided with a gripping groove for receiving a substantially semi-peripheral surface opposite to the outer periphery of the pipe, and sandwiching the pipe between the first gripping member and the second gripping member;
In the pipe fixing device, provided with a bolt for fastening the first and second holding members in a direction opposite to each other,
One of the alternately positioned edges of the gripping grooves of the first and second gripping members extends to a position beyond the border line which bisects the pipe in the opposite direction, and the other edge is the border concerned Configured to terminate at locations not reaching the line,
Wherein the edges extending to a position beyond the perimeter of the pipe in the gripping groove, deformation restricting portion expanded and deformed portion of the boundary of the pipe is contacted by the fastening of the bolt is formed and wherein Rukoto Pipe fixing device. Said gripping groove of the first and second gripping members, piping fixing device according to claim 1, characterized that you include a pair of contact portions for pressing the pipe on the inclined surface toward the opposite sides from the bottom . The deformation restricting portions of the first and second gripping member, the pipe anchoring device of claim 1 or 2 characterized in that it is constituted by a plane perpendicular to the boundary line of the pipe.

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