JP2003294016A - Intersection connector for fiber reinforced resin pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure a stability of a scaffold when a worker stands at the intersection of pipes and prevent a net from being broken and refuse from being caught. <P>SOLUTION: An intersection connector comprises a saddle shaped block 7 made of a synthetic resin member and having upper and lower curved parts 6 meeting the diameter of pipes 1 in an intersecting state and an attaching hole 8 opened at the centers of the curved parts, a stay bolt 9 made of stainless steel inserted into a through-hole 14 passing through the upper and lower pipes 1 fitted to the curved parts 6 and the attaching hole 8, a pipe pressing plate 10 formed integrally with the upper part of the bolt 9 by welding and formed in a curved surface meeting the diameter of the upper pipe, an R washer 11 inserted to a protruding end from the lower pipe 1 of the bolt 9 and formed in a curved surface shape meeting the diameter of the lower pipe, and double nuts 12 and 13 made of stainless steel and screwed and fixed to the end part of the bolt 9. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a cross connecting device for fiber reinforced resin pipes.

[0002]

2. Description of the Related Art The present applicant has previously developed a device for connecting fiber-reinforced resin pipes or pipes made of other materials in a crossed state. This connecting device is, for example, as disclosed in Japanese Unexamined Patent Publication No. 2001-227514, a saddle-shaped member in which curved surfaces along an outer peripheral curved surface of a pipe are formed in an up and down 90-degree crossing state, a crossing portion of the pipe, and a saddle-like member. The through bolt is formed by penetrating through the through hole formed in and the other end is fastened with a nut.

The saddle member is made of a synthetic resin molded body, and the curved surface is embossed to secure a friction torque at the time of gripping the pipe, and between the bolt head and the nut and the outer circumference of the pipe. A curved washer is interposed to prevent local tightening due to excessive tightening.

This connecting device is inexpensive and has only one fastening point as compared with a general metal orthogonal joint used for assembling supports and the like, and in particular, there is an upper limit to the breaking torque. It is suitable as a cross connecting device for fiber reinforced resin pipes with limited torque.

The connecting device and the fiber reinforced resin pipe described above are suitable for the framework of general marine equipment such as a frame of a cage for cultivating fishery resources, a work raft, and a floating pier. this is,
This is because the fiber-reinforced resin pipe does not cause rust as seen in general metal pipes and is less likely to corrode compared to logs and rods made of an organic material such as bamboo or thinning material, and the saddle-shaped member also. This is also because the bolt nuts and the like are made of SUS stainless material and have high durability against corrosion.

[0006]

However, in the above-mentioned cross connecting device, the bolt head projects to the top of the crossing portion, and there is a problem in balance when an operator puts his foot at this crossing position. there were. In other words, in general, when working on a frame that projects above the sea surface, the crossing position of the pipe is the most stable scaffolding position, and by placing your foot on this position, the stable posture of the worker can be maintained, If the head of the bolt is protruding, the operator will trip over and slip, making it difficult to maintain a stable posture for a long time, and the net will be caught and damaged.
There is a problem that dust etc. will be caught.

The present invention has been made in order to solve the above problems, and secures scaffolding stability when an operator stands at a crossing position of pipes and prevents damage to the net and catching of dust and the like. The present invention provides a cross-linking device for fiber-reinforced resin pipes.

[0008]

In order to achieve the above object, the present invention has a synthetic resin molded body in which curved portions corresponding to the pipe diameter are vertically formed in an intersecting state and a mounting hole is opened at the center of the curved portion. A saddle-shaped block made of, a stay bolt inserted into the through hole and the mounting hole formed by penetrating the upper and lower pipes fitted to the curved portions, and integrated with the upper portion of the bolt by welding, Also, a pipe pressing plate formed into a curved surface corresponding to the diameter of the upper pipe, and an R washer inserted into the projecting end of the bolt from the lower pipe and formed into a curved shape corresponding to the diameter of the lower pipe. And a nut which is screwed and fixed to the tip of the bolt on the lower surface of the R washer. Therefore, according to the present invention, since the pipe pressing plate is exposed on the upper surface of the cross connecting position and the bolt head does not project as in the conventional case, the stability when the foot is put on the cross position is ensured and the net of the net is secured. As well as preventing damage and catching of dust, etc., it is possible to prevent co-rotation of the bolts when tightening the bolts, thus improving assembly workability.

Further, in the present invention, since the nut has a return preventing function, the connected state can be firmly held.

[0010]

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

First, FIG. 1 is a sectional view of a fiber-reinforced resin pipe to which the connecting device of the present invention is applied. This pipe 1 comprises a hollow core 2, an intermediate layer 3 integrated on the outer periphery of the core 2, and an outer layer 4 integrated on the outer periphery of the intermediate layer 3. The outer layer 4 and the outer layer 4 are made of a thermoplastic resin, the intermediate layer 3 is made by integrating reinforcing fibers with a thermosetting resin, and the intermediate layer 3 imparts toughness to the pipe. The outer layer 4 also functions as a protective layer for preventing scratches and the like of the fibers of the intermediate layer 4 due to splintering, and the outer surface of the outer layer 4 has, for example, a stitched emboss 4a.
By forming the, the frictional force on the peripheral surface is increased.

FIG. 2 shows a cross connecting device for the pipe 1 described above. The connecting device 5 is made of a synthetic resin molded body, and has a curved portion 6 which vertically corresponds to the diameter of the pipe 1.
Saddle-shaped block 7 formed in a 90 degree crossing state, and a stay bolt 9 made of SUS stainless steel that is attached to the saddle-shaped block 7 through a mounting hole 8 opened at the center of the saddle-shaped block 7.
And a stainless steel pipe pressing plate 10 that is integrated with the head of the bolt 9 by welding and that is curved according to the outer diameter of the upper pipe 1, and is inserted into the tip of the bolt 9 and that of the lower pipe. It is composed of an R washer 11 curved according to the outer diameter and double nuts 12 and 13 made of SUS stainless that are screwed and fixed to the tip of the bolt, and at least the lower nut 13 has a return prevention function.
It is preferable to use a nut.

A mesh-like embossment 6a is formed on each of the curved portions 6 of the saddle-shaped block 7 so as to improve the frictional force at the connecting position together with the embossment 4a formed on the outer circumference of the pipe 1.

The pipe pressing plate 9 has a thick central portion and a thin shape toward the periphery.
In addition, the lower surface side is formed into a curved surface slightly smaller than the outer diameter of the pipe 1, thereby giving a biting property at the time of tightening.

3 and 4 show a state in which the upper and lower pipes 1 are connected to each other in a 90-degree crossing state by the connecting device 5 described above.

As an assembling method, through holes 14 are opened in advance at a crossing position between the upper and lower pipes 1 in a factory or the like. The through hole 14 is formed to have a diameter larger than that of the bolt 9. Next, the saddle-shaped blocks 7 are arranged between the pipes 1 and the curved portions 6 are fitted to the pipes 1, respectively.
With the through hole 14 and the mounting hole 8 aligned with each other, the bolt 9 is inserted from the upper portion thereof so that the curved surface of the pressing plate 10 is aligned with the peripheral surface of the upper pipe 1.

Next, R is attached to the bolt protruding end of the lower pipe 1.
Insert the washer 11, insert the nut 12 into the tip of the bolt, and tighten with a wrench or the like. After tightening with a predetermined torque, the lower nut 13 is further inserted and tightened to complete the assembly work. In addition, in the screwing work, since the pipe holding plate 10 on the upper side is controlled by the pipe, it is not necessary to hold down the bolt head as compared with the conventional fastening work using the bolt head. Therefore, the workability can be improved.

With this series of tightening torques, the periphery of the pipe pressing plate 10 is caught in the embossing 4a and adheres tightly to the peripheral surface of the upper side pipe 1 to enable a firm assembly.

Further, the coupling force between the pipes 1 and the curved portion 6 is also improved by the biting effect due to the engagement of the embosses 4a, 6a.

In the assembled state, as shown in the figure,
Since the pressing plate 10 along the curved surface of the pipe 1 slightly protrudes on the upper surface of the intersecting portion and is substantially flat, when the operator uses this position as a foothold, there is no extra protrusion, so that it is stable. The posture can be maintained, stability is secured, and dust and the like can be prevented from being caught.

In the figure, a pipe 15 having a diameter smaller than that of the upper pipe 1 is concentrically provided inside the upper pipe 1.
As described above, it is needless to say that in addition to the double-pipe structure, a single-pipe structure can be used if necessary.

Further, in the above-mentioned embodiment, both pipes to be connected are the fiber-reinforced resin pipes 1, but at least one of them may be made of another material,
Further, by making the diameters of the upper and lower curved portions 6 of the saddle-shaped block 7 different from each other, it is possible to adapt when connecting pipes having different diameters.

[0023]

As is apparent from the above description, according to the fiber-reinforced resin pipe connecting device of the present invention, the scaffolding stability is secured and the net is damaged when an operator stands at the intersecting position of the pipes. It is possible to prevent catching of dust and the like.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a fiber reinforced resin pipe to which a connecting device of the present invention is applied.

FIG. 2 is an exploded perspective view of a single continuous coupling device.

FIG. 3 is a perspective view showing a state where pipes are connected to each other by the connecting device.

FIG. 4 is a front sectional view and a side view of the same.

[Explanation of symbols]

1 Fiber reinforced resin pipe 5 Cross connection device 6 curved part 7 saddle block 8 mounting holes 9 Stay bolt 10 Pipe holding plate 11 R washer 12,13 Double nut 14 through holes

Claims (2)

[Claims] 1. A saddle-shaped block made of a synthetic resin molded body in which curved portions corresponding to a pipe diameter are formed in an upper and lower direction in an intersecting state, and a mounting hole is opened at the center of the curved portion, and the curved portions are fitted to each of the curved portions. A stay bolt inserted through the through hole and the mounting hole formed through the upper and lower pipes, and a pipe integrated with the upper portion of the bolt by welding and having a curved surface corresponding to the diameter of the upper pipe The presser plate, the R washer that is inserted into the projecting end of the bolt from the lower pipe, and is formed into a curved shape according to the diameter of the lower pipe, and the lower surface of the R washer is screwed and fixed to the tip of the bolt. Cross-linking device for fiber-reinforced resin pipes, characterized by comprising: 2. The fiber-reinforced resin pipe cross-connecting device according to claim 1, wherein the nut has a return preventing function.