JP2001141146A - Split pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a split pipe joint which can easily achieve the tightening work by bolts even by a single hand, and surely achieve the joining without damaging any bolts. SOLUTION: At least one part is openable, and this opening part of this split pipe joint can be tightened by bolts at flange parts which are extended from tips of the opening part and butted to each other, and locking holes to which bolt heads or nuts to be tightened are attached in a non-turnable manner are formed at bolt tightening positions of the joint body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split-type pipe joint, and more particularly, to a split-type pipe joint for preventing co-rotation and damage during tightening, and for preventing bolts and nuts from falling.

[0002]

2. Description of the Related Art Conventionally, for protective pipe fittings such as electric power and communication cables, protective piping work is often carried out at high places where scaffolding is poor. These pipe fittings for protective pipes are usually shown in FIG.
As shown in FIG. 6, a so-called half-coupled coupling is used. However, since the above-mentioned half-coupling generally has only a through-hole provided in the tightening flange 10, the bolt 21 and the nut 22 rotate together when tightening, so that the body is not secured for worker safety. In particular, in the case of a one-handed operation in which the user grips the support with one hand, it is easy to rotate together. Therefore, in order to prevent the co-rotation, it is required that both hands are always in a free state, and it is necessary to use two tightening tools such as a ratchet wrench.

[0003] Further, in the above-mentioned half-coupling, bolts and nuts are liable to drop or be lost during the operation, thereby consuming not only unnecessary materials but also having poor workability such as the necessity of performing redundant operations. In addition, since the gap between the bolt and the bolt hole is narrow, there is a problem that the bolt is liable to be burned out or broken when tightened slightly obliquely.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to enable a bolting operation with one hand to be easily performed with one hand. An object of the present invention is to provide a split-type pipe joint which can surely be joined and piped without damage or the like.

[0005]

According to a first aspect of the present invention, there is provided a split type pipe joint, wherein at least one location can be opened, and the opening is tightened with each other by extending the tip of the opening. Split type pipe joint made by bolting of a fitting flange, wherein a locking hole into which a head or a nut of a tightening bolt is non-rotatably fitted is formed at a bolt tightening position of the joint body. It is.

According to a second aspect of the present invention, there is provided the split type pipe joint according to the first aspect, wherein the bolt hole formed in the joint main body has a total length of the bolt in a direction orthogonal to the axis of the bolt to be tightened. It is made into a long hole over.

According to a third aspect of the present invention, in the split type pipe joint according to the first aspect, the bolt holes formed in the joint main body are positioned from the bolt tightening positions of the flange portions which are mutually palmed. An elongated hole is formed parallel to the surface of the flange portion, and is opened at one edge of the flange portion.

A split pipe joint according to a fourth aspect of the present invention is the split pipe joint according to the first aspect, wherein a hole diameter of the bolt to be tightened is gradually increased in the axial direction.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings, but the present invention is not limited to these embodiments.

FIG. 1 is a partially cutaway sectional view showing an example of a main portion of a split pipe joint according to the present invention. 11 and 12
Are flanges which extend from the opening of the split-type pipe joint 1 and engage with each other. The flanges 11 and 12 are provided with electric power, communication cables and the like joined by the split-type pipe joint of the present invention. Bolt holes 13 for tightening pipes such as pipes for protection pipes
Is formed as a hole communicating with the bolt 21 tightening position in a state where the flanges 11 and 12 are in a palm-to-palm relationship. The outer surface of one of the flanges 12 is provided with a head of the tightening bolt 21. Alternatively, a locking hole 14 into which the nut 22 is fitted is provided.

The flanges 11 and 12 are not particularly limited as long as they can be tightened to a desired strength by the bolts 21, and include, for example, flanges of a size usually used for flange joining.

The bolt hole 13 makes the work difficult when the bolt 21 is inserted, or
The bolt 21 and the nut 22 are not particularly limited as long as they do not damage the bolt 21 and the nut 22 at the time of tightening. However, as shown in FIG. 2, the total length of the bolt 21 is preferably perpendicular to the axis of the bolt 21 to be tightened. As shown in FIG. 3, an elongated hole 132 is formed in parallel with the surfaces of the flanges 11 and 12 from the tightening positions of the bolts 21 of the flanges 11 and 12 which are palmed together as shown in FIG. The opening formed at one end edge M of the flange portion, as shown in FIG. 4, an opening formed in a tapered shape in the axial direction of the bolt 21 to be tightened, and the like.

The bolt hole 131 shown in FIG. 2 is formed as an elongated hole 131 over the entire length of the bolt 21 in a direction perpendicular to the axis of the bolt 21 to be tightened. It is sufficient that the diameter is larger than the diameter of the bolt 21, and the short diameter is larger than the diameter of the tightening bolt 21.
It is necessary that the head of the bolt 21 and the nut 22 are locked to the flange portion 12 and have a length that is less than a length sufficient to exhibit a desired tightening strength.

The bolt hole 132 shown in FIG. 3 is formed such that one end of the elongated hole shown in FIG. 2 is further extended in parallel with the surfaces of the flange portions 11 and 12, and is opened at one edge M of the flange portions 11 and 12. It is made. The form of extension of one end of the long hole 132 is not particularly limited, and for example, as shown in FIG. The major and minor diameters of the elongated hole 132 are the same as the major and minor diameters of the bolt hole 131 shown in FIG.

The bolt hole 133 shown in FIG. 4 is formed by gradually increasing the diameter of the bolt 21 in the axial direction of the bolt 21 to be tightened. However, the form of the enlargement is not particularly limited. The diameter may be expanded linearly, but may be expanded non-linearly or intermittently in steps. Among them, a tapered hole whose diameter is increased linearly as shown in FIG. 4 is preferably used.
In addition, the major axis and minor axis of the larger diameter hole of the bolt hole 133 are the same as the major axis and minor axis of the bolt hole 131 shown in FIG.

The locking hole 14 is not particularly limited as long as the head of the bolt 21 or the nut 22 is fitted so as not to rotate. For example, the shape of the head of the bolt 21 or the nut 22 is not limited. The same is true for a locking hole having a square or hexagonal planar shape.

The material constituting the split pipe joint of the present invention is not particularly limited, but is preferably a synthetic resin material having excellent corrosion resistance and light weight, and a metal having excellent rust resistance and strength. Materials and the like. As the synthetic resin material,
Although not particularly limited, examples thereof include olefin resins such as polyethylene and polypropylene, vinyl chloride resins, polyamide resins such as nylon, and ester resins such as polyethylene terephthalate. The metal material is not particularly limited,
For example, stainless steel, brass steel, aluminum alloy and the like can be mentioned.

Further, the form of the connection port of the split pipe joint of the present invention is determined according to the shape of the connection portion of the pipe to be piped, and is not particularly limited.
A cheese, a socket, or the like, in which all the connection ports are reception ports, may be used.

To pipe using the split type pipe joint of the present invention, after joining the pipes to be joined by widening the opening, for example, a bolt head or a nut is fitted into a locking hole of the split type pipe joint. A nut or bolt is screwed in from the flange surface on the opposite side where the locking hole is provided, and tightened by a tightening tool such as a ratchet wrench, so that the connection can be made reliably and easily. There is no risk of burning or breaking.

[0020]

The split-type pipe joint according to the first aspect of the present invention is configured as described above, so that, in piping work, the work of tightening the split-type pipe joint by bolts can be easily performed with one hand.
In addition, it can be performed reliably, and there is no risk of bolts and nuts dropping and losing during the work, thereby eliminating unnecessary work and losing workability such as having to perform redundant work. .

The split-type pipe joint according to the second aspect of the present invention is configured as described above. Therefore, in addition to the effects described for the split-type pipe joint of the first aspect, when the bolt is tightened, The bolt can be constructed with high reliability and productivity without the risk of the bolt being burned out or broken.

Since the split-type pipe joint according to the third aspect of the present invention is configured as described above, in addition to the effects described in the split-type pipe joints according to the first and second aspects of the present invention, a bolt tightening is also provided. In some cases, piping can be constructed with even higher reliability and productivity, such as easier installation of bolts.

Since the split pipe joint according to the fourth aspect of the present invention is configured as described above, in addition to the effects described for the split pipe joint of the first aspect of the present invention, when the bolt is tightened, There is no risk that the bolt will be burned or broken, and it will be easier to install the bolt when tightening the bolt.
Further, piping can be constructed with high reliability and productivity.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing an example of a main part of a split pipe joint according to the present invention.

FIG. 2 is a view showing another example of a main part of the split pipe joint of the present invention, in which (1) is a partially cutaway plan view of a flange portion in which a bolt hole is formed, and (2). FIG. 3 is a partially cutaway sectional view showing a main part of the split pipe joint tightened by bolts.

FIG. 3 is a view showing another example of a main part of the split pipe joint of the present invention, wherein (1) is a partially cutaway plan view of a flange portion in which a bolt hole is formed, and (2). FIG. 3 is a partially cutaway sectional view showing a main part of the split pipe joint tightened by bolts.

FIG. 4 is a view showing another example of a main part of the split pipe joint of the present invention, wherein (1) is a partially cutaway plan view of a flange portion having a bolt hole formed therein, and (2). FIG. 3 is a partially cutaway sectional view showing a main part of the split pipe joint tightened by bolts.

FIG. 5 is a front view showing an example of a conventional half coupling.

FIG. 6 is a side view of the half coupling shown in FIG. 5;

[Explanation of symbols]

 Split pipe joint 10, 11, 12 Flange 13, 131, 132, 133 Bolt hole 14 Locking hole 21 Bolt 22 Nut M Flange edge

Claims (4)

[Claims] 1. A split pipe joint which can be opened in at least one place, and wherein the opening is tightened by bolting flanges which are extended from each other and whose ends are extended. A split pipe joint, wherein a locking hole into which a head or a nut of a tightened bolt is non-rotatably fitted is formed at a bolt tightening position of the joint body. 2. The split pipe joint according to claim 1, wherein the bolt hole formed in the joint main body is formed as an elongated hole in the direction perpendicular to the axis of the bolt to be tightened over the entire length of the bolt. 3. A bolt hole formed in the joint body is formed as an elongated hole from the bolt tightening position of the mutually engaged flanges in parallel with the flange surface, and opens at one end edge of the flange. The split type pipe joint according to claim 1, wherein 4. The split pipe joint according to claim 1, wherein the diameter of the bolt hole formed in the joint body is gradually increased in the axial direction of the bolt to be tightened.