JP6461594B2 - Fixing structure and U bolt - Google Patents

Description

  The present invention relates to a fixing structure for an object to be fixed and a U bolt used for the fixing structure.

  In general, when fixing an object to be fixed having a circular or circular cross-sectional shape such as various pipes and rods for vehicles, water supply, gas, various plants and ships, etc., U bolts are used. (For example, refer to Patent Documents 1 and 2).

A typical example of the U bolt is a U bolt as shown in FIG. FIG. 4 is a perspective view of a conventional fixing structure. Referring to FIG. 1, a conventional U-bolt 3 has a pair of bolt portions 30 with a male screw formed at the tip, and a curved beam portion 31 continuous to the base end portion of each bolt portion 30. The whole is U-shaped.

When fixing the piping 20 as an object to be fixed to the support body 40 using the conventional U bolt 3, generally, the U bolt 3 is moved downward from above the piping 20 placed on the support body 40. Then, while introducing the pipe 20 to the beam portion 31 side through between the bolt portions 30, the tips of the bolt portions 30 are inserted into the support body 40, and then inserted to the insertion tip side (lower end side) of each male screw. The pipe 20 is sandwiched between the beam portion 31 and the support body 40 by screwing and tightening the lower nut 50.

Japanese Utility Model Publication No. 61-57286 Japanese Patent Laid-Open No. 10-213118

  The above-mentioned various pipes expand and contract due to changes in fluid temperature and outside air temperature. In the conventional U-bolt, there are cases where deformation, distortion, cracks in piping, etc. occur in the gantry. In addition, troubles of vibration and noise from the piping have also occurred.

Therefore, as shown in FIG. 4, a pad 41 made of rubber or the like is provided on the support 40 to improve the problem. However, the defect has not been improved sufficiently.

  Accordingly, an object of the present invention is to provide a U-bolt and a fixing structure that can improve the above-mentioned problems.

The U-bolt of the present invention has a pair of bolt portions 30 with male screws formed at the tips and beam portions 31 connecting the base end portions of both bolt portions 30, and each male screw is opposed to the beam portions 31. In order to sandwich the object to be fixed 20 between the beam portion 31 and the support body 40 by screwing and tightening a nut 50 to the tip side of each male screw in a state of being inserted into the support body 40 to be fixed. U bolt 3 of
A cylindrical covering layer 33 that covers the curved curved portion 32 in the beam portion 31 is provided,
The covering layer 33 is formed of a knitted or woven fabric.

The knitted or woven coating layer 33 covered with the curved portion 32 of the U bolt makes it easy for an object to be fixed such as piping to slide on the surface of the U bolt. Therefore, the expansion and contraction of the piping material becomes smooth, and problems such as piping cracks, vibrations and noise from the piping can be improved.
Further, the coating layer 33 of the present U-bolt is cylindrical and covers the curved portion 32 over the entire circumference, and therefore there is no possibility that the coating layer 33 is dropped due to severe vibration.

It is the perspective view and front view which show an example of this fixed structure. FIG. 2A is a perspective view showing an example of the U-bolt, and FIG. 2B is a perspective view showing an example of a pad. It is the exploded perspective view before the assembly of the U bolt, and a sectional view of the U bolt. It is a perspective view which shows an example of the conventional fixing structure.

  Preferably, the curved portion 32 is covered with a cylindrical portion 34 made of rubber or a thermoplastic resin elastomer, and the covering layer 33 covers the cylindrical portion 34.

  In this case, a cushion is obtained between the cylindrical body portion 34 of the elastomer and the fixed object 20, and the vibration and noise can be further reduced.

  Preferably, terminal means 35 for preventing the fibers at both ends of the covering layer 33 from being unwound is provided.

In this case, the terminal means 35 may improve the appearance and the service life of the coating layer 33.

As the fixing structure of the fixed object of the present invention, a U bolt 3 having a pair of bolt parts 30 having male screws formed at the front ends and beam parts 31 connecting the base ends of both bolt parts 30;
A support body 40 provided to face the beam portion 31 and through which the male screws of the pair of bolt portions 30 are inserted;
A fixing structure of the fixed object 20 in which the fixed object 20 is sandwiched and fixed between the beam portion 31 and the support body 40 by screwing and tightening a nut 50 to the tip side of each male screw,
The curved curved portion 32 of the beam portion 31 is covered with a cylindrical body portion 34 of rubber or a thermoplastic resin elastomer,
A cylindrical covering layer 33 is provided to cover the cylindrical body part,
The covering layer 33 is formed of a knitted or woven fiber;
Terminal means 35 for preventing the fibers at both ends of the covering layer 33 from being unwound is provided.

Such a fixing structure exhibits the aforementioned advantages.

Features described and / or illustrated in connection with one such embodiment or each of the following examples may be in the same or similar form in one or more other embodiments or other examples, and / or It can be utilized in combination with or instead of the features of other embodiments or examples.

The invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings, in which: However, the examples and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a fixing structure of a pipe 20 using a U bolt 3 according to an embodiment of the present invention.
Referring to FIG. 1, a U-bolt 3 according to the present embodiment is for fixing various pipes 20 for water supply, gas, various plants, and ships as fixed objects.

The U-bolt 3 includes a pair of bolt portions 30 having a male screw formed at the tip, and a beam portion 31 continuous with the base end portion of each bolt portion 30. The beam portion 31 is U-shaped and has a curved portion 32 that is curved. The male screw of each bolt part 30 is inserted into the support body 40 arranged to face the beam part 31, and the pipe 20 is connected to the beam part 31 by screwing and tightening the nut 50 to the insertion tip side. And the support 40 are sandwiched and fixed.

The support 40 may be a flat plate or a grooved channel rail, and preferably has a pad 41 attached thereto. The pad 41 is preferably made of, for example, a weather-resistant rubber that is coated with fluorine, and the expansion and contraction of the pipe 20 becomes smooth and insulation is exhibited.

As shown in FIG. 3B, the support body 40 and the pad 41 support a vertical load acting on the pipe 20 and allow the pipe 20 to move in the pipe axis direction.

As shown in FIG. 3B, the curved curved portion 32 of the beam portion 31 is covered with a cylindrical body portion 34 of rubber or a thermoplastic resin elastomer. The material of the rubber or elastomer is not limited as long as it is a rubber-like elastic body that is deformed by an external force and restores the original shape when the external force is removed. The cylindrical portion 34 is useful for suppressing vibration and vibration noise.

A cylindrical covering layer 33 that covers the cylindrical portion 34 at least at the curved portion 32 is provided on the outer periphery of the cylindrical portion 34. The covering layer 33 is formed of a knitted fiber or a woven fabric.

The covering layer 33 may be formed of a cylindrical knitted fabric or woven fabric with first fibers of a fluororesin such as polytetrafluoroethylene and second fibers such as polyester. As the knitted fabric, for example, a blade knitting may be adopted.

  That is, the first fiber has a good sliding property with a small frictional resistance with a metal or the like as compared with the second fiber, while the second fiber employs a material having higher wear resistance than the first fiber. Is preferred. Such a knitted fabric of dissimilar fibers exhibits electrical insulation properties for smooth expansion and contraction of the pipe 20 and prevention of electrolytic corrosion over a long period of time.

  In this embodiment, the U bolt 3 is provided with terminal means 35 for preventing the fibers at both ends of the covering layer 33 from being unwound. As the terminal means 35, the heat-shrinkable tube shown in FIG. 3A may be heated to clamp both ends, or an adhesive or hot melt may be used.

  At the time of manufacture, as shown in FIG. 3A, the outer periphery of the cylindrical portion 34 may be covered with a coating layer 33 in advance, and the cylindrical portion 34 integrated with the coating layer 33 may be fitted from one end of the U bolt 3.

  The U-bolt of the present invention is generally applicable to fixing structures for fixed objects such as various pipes and rods for vehicles, water supplies, gas, various plants and ships.

3: U bolt 20: Piping (fixed object)
30: Bolt part 31: Beam part 32: Curved part
33: Covering layer 34: Tube portion 35: Terminal means 40: Support body 41: Pad 50: Nut

Claims (4)

It has a pair of bolt parts 30 with male threads formed at the tips, and beam parts 31 that connect the base ends of both bolt parts 30, and each male screw is inserted through a support body 40 that faces the beam parts 31. In this state, a U-bolt 3 for clamping and fixing the fixed object 20 between the beam portion 31 and the support body 40 by screwing and tightening a nut 50 to the front end side of each male screw. ,
A cylindrical covering layer 33 that covers the curved curved portion 32 in the beam portion 31 is provided,
The covering layer 33 is formed of a knitted or woven resin fiber ;
Here, the covering layer 33 is formed of a cylindrical knitted fabric or a woven fabric with a first fiber and a second fiber,
The first fiber has a lower frictional resistance with the metal than the second fiber, while the second fiber has higher wear resistance than the first fiber. bolt. 2. The U-bolt according to claim 1, wherein the first fiber is a fluororesin and the second fiber is polyester. A U-bolt 3 having a pair of bolt portions 30 with male threads formed at the distal ends and a beam portion 31 connecting the base end portions of both bolt portions 30;
A support body 40 provided to face the beam portion 31 and through which the male screws of the pair of bolt portions 30 are inserted;
A fixing structure of the fixed object 20 in which the fixed object 20 is sandwiched and fixed between the beam portion 31 and the support body 40 by screwing and tightening a nut 50 to the tip side of each male screw,
The curved curved portion 32 of the beam portion 31 is covered with a cylindrical body portion 34 of rubber or a thermoplastic resin elastomer,
A cylindrical covering layer 33 is provided to cover the cylindrical body part,
The coating layer 33 is formed of a knitted or woven resin fiber that exhibits electrical insulation ,
The covering layer 33 is formed of a cylindrical knitted fabric or a woven fabric with a first fiber and a second fiber,
The first fiber has a smaller frictional resistance with the metal than the second fiber, while the second fiber has better wear resistance than the first fiber,
A fixing structure for an object to be fixed, provided with terminal means 35 for preventing the fibers at both ends of the covering layer 33 from being unwound. 4. The fixing structure for an object to be fixed according to claim 3, wherein the first fiber is a fluororesin and the second fiber is polyester.