JPS61155532A - Pipe joint apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a support structure for supporting an antenna reflecting surface, a large antenna, etc. in, for example, an artificial satellite or a space base, and particularly relates to a support structure for supporting an antenna reflecting surface, a large antenna, etc. in an artificial satellite, a space base, etc. Material A
CM (Advanced Coa+positeM
This invention relates to a pipe joint device for FRP pipes made of materials.

[Technical Background of the Invention] Conventionally, when connecting FRP pipes to a truss structure, this support structure has been constructed using connection joints made of metal materials such as Ti and Af due to problems such as strength. Installed and configured. Since the truss structure has a three-dimensional complex angle, such a connecting joint is generally manufactured by NC processing.

[Problems of the Background Art] However, the support structure described above has various problems because it uses a connecting joint made of a metal material to connect the FRP pipe to the truss structure.

First, since the connection joint has a higher density than the FRP pipe, the amount of furrows will inevitably increase accordingly.

Second, because the coefficients of thermal expansion of the connection joint and the FRP pipe are different, for example, when used in space where there is a large temperature difference, measures must be taken to avoid the generation of thermal stress. be.

Thirdly, due to the structure of the connection joint, it has to be manufactured using NC processing, so it takes time to manufacture the NC tape, which makes it expensive and has very poor manufacturing efficiency. be.

Fourth, the connection joint cannot be made thinner due to its structure, and therefore it cannot be made lighter.

[Objective of the Invention 1 This invention was made in view of the above circumstances, and provides an extremely good pipe that has a simple structure, can promote weight reduction as much as possible, and improves manufacturing and assembly workability. The purpose is to provide a joint device.

[Summary of the Invention] That is, the present invention achieves the initial objective by forming approximately T-shaped joints and clip members from advanced composite materials, and using these joints and clip members to adhesively connect pipes to a truss structure. This has been achieved.

[Embodiment 1 of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are a perspective view and a front view, respectively, showing a support structure for a fil1 reflecting mirror surface using a pipe joint device according to the present invention, and the pipe joint part in (A) in the figure is shown in FIG. 3. It is configured as shown.

That is, in Figure 3, Figure (a) is the bottom surface, Figure (b) is the bottom surface.
10 shows the top surface, and Figure (C) shows the side view.
This is a substantially T-shaped joint that connects the ends of each of the eleventh FRP pipes 11 to 21 to a truss structure. This joint 10
The prepregs made of advanced composite materials such as CFRP are laminated in multiple layers, and are formed by heating and pressure forming such as autoclave molding or press molding, as shown in FIGS. 4(a), (b), and (c), respectively. First to eleventh coupling portions 22 to 32 corresponding to the truss structure are formed in the illustrated shape. The first to eleventh FRP pipes 11 to 21 are connected to the first to eleventh joints 22 to 32, and the first to fourth joints 11 to 21 are connected to the first to fourth joints 22 to 32, which are made of the same composite material as the joint 10.
The clip members 33-36 are selectively used to adhesively bond the desired truss structure.

Here, the first clip member 33 is shown in FIG. 5(a)(1).
) It is formed into a substantially cylindrical shape corresponding to the outer diameter of the pipe, as shown in the front, plane, and side views respectively in (C), and an inclined portion 331 is formed at a predetermined angle at the tip thereof. Guide grooves 332 and 332 into which the ninth and tenth coupling parts 30 and 31 of the joint 10 are respectively inserted are formed at the upper and lower ends of the inclined part 331 up to predetermined positions in the axial direction.

The second clip member 34 is formed in a substantially semicircular shape corresponding to the first clip member 33, as shown in FIGS. A gap 341 is formed in the axial direction of the first clip member 33, and a slope 342 is formed at the tip of the gap 341.
31.

The third clip member 35 is shown in FIGS. 7(a) and 7(b).
As shown in (c), a plane, a front surface, and a side surface, respectively, an adhesive surface portion 351 that is bonded to the plate surface portion of the joint 1o and a curved portion 352 that engages with the outer diameter of the pipe are formed, and the intermediate portion thereof is formed. Reinforcing ribs 353 are formed.

Further, as shown in FIGS. 8(a) and 8(b), respectively, the fourth clip member 36 has an adhesive surface portion 361 that is adhered to the plate surface portion of the joint 10, and a curved portion that engages with the outer diameter of the pipe. A portion 362 is formed.

In addition, the above-mentioned advanced composite material ACM (Advance
MATRIX in dComposite Materials is not limited to pIastlcs, but can also be made of metals.

Now, the joint 10 configured as described above and the first to fourth joints
The clip members 33 to 36 connect the first to eleventh FRP pipes 11 to 21 to the truss structure as described below.

That is, when the first and fifth FRP pipes 11.degree. 15 are integrated into the first and fifth joint portions 22.degree. 26 of the joint 10, first the first and fifth joint portions 22. 2
Approximately T-shaped slit portions 111, 151 (
(see Figure 9). Next, this first and fifth F
RP pipe 11.15 has its slit part 111.151
are fitted into the first and fifth coupling parts 22, 26 of the joint 10, and their respective tips are fitted into the third and fourth clip members 35.
．． 36 are used to make a contact W connection to the first and fifth joint portions 22 and 26 of the joint 10, respectively.

When the second FRP pipe 12 is attached to the second joint part 23 of the joint 10, first the approximately letter-shaped slit part 121 (the 10th
(see figure). Next, this second FRP pipe 1
2 connects the slit portion 121 to the second joint portion 2 of the joint 10
3, and its tip is connected to the second coupling part 23 of the joint 10 using the fourth clip member 36 of 411N. In this case, the fourth clip member 36 is formed to have appropriate dimensions so as not to come into contact with adjacent clip members or the like.

Also, 3rd. 4th. 6th. 7th. 8th and 11th FR
The P pipes 13.14, 16.17° and 18.21 are respectively attached to the third pipe of the joint 10 using the fourth clip member 36 in substantially the same way as the second FRP pipe 12 described above. 4th. 6th. 7th. Eighth and eleventh coupling portions 24.25.27.
28°29.32, and the explanation of this and the trowel will be omitted for the sake of convenience.

When attaching the ninth and tenth FRP pipes 19 and 20, first insert the 2 m long second clip member 33 into the guide grooves 332 and 332 of the first clip member 33, as shown in FIG. The second clip members 34 are inserted so as to form substantially the same shape, and the second clip members 34 are fixed to the ninth and tenth coupling portions 30.31 of the joint 10 so as to be sandwiched therebetween, respectively. Therefore, the ninth and tenth FRP vias 19.2
0 is the 9th and 10th joint part 30° 31
The first clip members 33 supported by the first clip members 33 are inserted and adhesively bonded to each other.

That is, in the pipe joint device configured as described above, when the first to eleventh FRP vias 11 to 21 are adhesively bonded to the truss structure using the joint 10 and the first to fourth clip members 33 to 36, the joint 10 The strength and rigidity of the third clip member 35 is sufficiently improved by clips such as the third clip member 35 7353. Therefore, the pipe joint device is reliably prevented from being damaged due to bending, twisting, etc. imparted to the joint 10.

[Effects of the Invention] As detailed above, according to the present invention, an FRP pipe can be adhesively bonded to a truss structure using a substantially T-shaped joint and a clip member made of a composite material with a tip substantially similar to that of the FRP pipe. By configuring it to be possible, it is possible to promote weight reduction as much as possible compared to those using conventional connection joints made of metal materials, and the configuration is simplified as much as possible to improve manufacturability. This makes it possible to improve assembly workability as much as possible.

Furthermore, the present invention is not limited to the above-mentioned embodiments, but is illustrated in FIG.
a), (b), and (C) are the bottom and top surfaces, respectively.

As shown in the side view, it can also be applied to a truss structure using seven FRP byes 137 to 43, such as the pipe joint part (B) in FIG. Almost the same effect can be expected regardless of the number.

Further, the present invention can be applied to a bi-four truss structure having a curvature and a planar truss structure by adjusting the angle of the connecting portion of the joint.

Furthermore, although the above embodiments have been described using the first to fourth clip members 33 to 36, the truss structure is not limited to this. By configuring the pipes to be connected and coupled, effective effects such as further improvement in assembly workability and tear strength of the pipe can be expected.

It goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[Brief explanation of drawings]

1 and 2 are a perspective view and a plan view, respectively, showing a support structure to which the present invention is applied, FIG. 3 is a configuration explanatory diagram showing a pipe joint device according to an embodiment of the present invention, and FIG. 4 Figures 8 through 8 each show details of the main parts of Figure 3.
9 to 11 are operation explanatory diagrams shown to explain the assembly operation of FIG. 3, respectively, and FIG. 12 is a configuration explanatory diagram showing another embodiment of the present invention. 10...Joint, 11-21...1st to 11th FR
P pipe, 22-32... 1st-11th joint portion, 3
3... First clip member, 34... Second clip member, 35... Third clip member, 36... Fourth clip member 1. 37-43... FRPF pipe. Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 3 (C) Figure 4 (a) (C) Figure 5 (a) (c) (b) Figure 6 (b) (a) Figure 7 (b) Figure 8 (a) (b) bl Figure 9 Figure 10

Claims (1)

[Claims] A pipe formed of an advanced composite material, a joint that connects the pipe to a truss structure, a substantially T-shaped joint formed of the advanced composite material, and a joint that attaches the pipe to the joint, A pipe joint device comprising: a clip member made of the advanced composite material.