JPS61155531A - 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] This invention applies to artificial surfaces, for example! Advanced composite material A that relates to support structures that support antenna reflecting mirror surfaces, large antennas, etc. at space bases, etc., and is particularly bonded to the truss structure thereof.
CM (Advanced CompositeM
This invention relates to a pipe joint device for FRP pipes.

[Technical Background of the Invention] Conventionally, this type of support structure has been constructed using 7i,
A connection joint made of a metal material such as A2 is used to attach and configure it in a desired state. Since the truss structure has a three-dimensional complicated angle, such a connecting joint is generally fabricated by NG 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, the density of the connection joint is greater than that of the FRP pipe, which inevitably increases the weight.

Second, since the coefficients of thermal expansion of the connection joint and the FRP pipe are different, for example, when using 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 processed and manufactured by NCJO machining, which requires time to manufacture the NC tape, which is 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.

[Object of the invention] This invention was made in consideration of the above-mentioned circumstances, and provides an extremely good pipe that has a simple structure, can promote weight reduction as much as possible, and has improved manufacturing and assembly workability. The purpose is to provide a joint device.

[Summary of the Invention] That is, the present invention forms a joint and a clip member that have a radial joint part on the outer periphery of a fitting part into which a pipe is fitted using an advanced composite material, and uses these joints and clip members to connect a pipe to a pipe. The initial objective was achieved by adhesively bonding the truss lll'111 to the truss lll'111.

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

FIG. 1 is a perspective view showing a support structure of the 1ill1 anti-tJ4n surface (not shown) using the pipe joint V1 position according to the present invention, and the pipe joint part (A) in the figure is configured as shown in FIG. has been done.

That is, in Figure 2, Figure (a) is the bottom surface and Figure (b) is the bottom surface.
indicates a side view, and 10 in the figure indicates the first to eleventh FRPs.
This is a joint that connects each end of the pipes 11 to 21 to a truss structure. This joint 10 is made by laminating 11 layers of prepregs made of advanced composite material such as CFRP, and is formed by heating and pressure forming such as autoclave molding or press molding to form a cylindrical first pipe corresponding to the outer diameter of the pipe, as shown in FIG. Second to ninth coupling parts 23 to 30, such as ribs, are radially formed at predetermined intervals on the outer periphery of the fitting part 22, such as the coupling parts. And among these, the second. 4th. Sixth and eighth joint portions 23
．． 25, 27, and 29, sloped joints 31 (only two are shown in FIG. 3), which become, for example, the 10th and 11th joints, are formed with slope angles corresponding to the truss structure, respectively. . Therefore, the first FRP pipe 11 is fitted into the fitting portion 22 of the joint 10, and the second to ninth connecting portions 23 to 30 and the inclined connecting portion 31 are fitted to the fitting portion 22 of the joint 10. After the eleventh FRP pies 112 to 21 are connected and coupled by selectively using the first to third clip members 32 to 34, a reinforcing plate 35 in the shape of a disk, for example, is secondarily bonded to the end face thereof. It looks like this.

Here, the first clip member 32 is shown in FIGS.
It is formed into a substantially cylindrical shape corresponding to the outer diameter of the pipe, as shown in FIG. . Guide grooves 322 into which the inclined coupling part 31 is inserted are formed at both upper and lower ends of the inclined part 321 up to a predetermined position in the axial direction.

The second clip member 33 is formed in a substantially semicircular shape corresponding to the first clip member 32, as shown in FIGS. A gap part 331 is formed in the axial direction of the first clip member 32, and a slope part 332 is formed at the tip of the gap part 331 in the axial direction of the first clip member 32.
21.

The third clip member 34 is shown in FIGS. 6(a) and 6(b).
As shown in the plan and side views, respectively, an adhesive surface portion 341 that is adhered to the joint surface of the joint 10 and a curved portion 342 that engages with the outer diameter of the pipe are formed.

Here, the first to third clip members 32 to 34 and the reinforcing plate 35 are each made of CFRP in substantially the same way as the joint 1o.
It is formed by laminating multiple layers of prepregs of advanced composite materials such as, for example, by heating and pressure molding such as autoclave molding or press molding.

Nao, the above-mentioned advanced composite material A CM (Advance
MATRI

Now, the joint 10 configured as described above and the first to third joints
The clip members 32-34 connect and couple the first to eleventh FRP vias 11-21 to the truss structure as described below.

That is, one end of the first FRP pipe 11 is inserted into the fitting part 22 of the joint 10, and the two are adhesively bonded at a predetermined position.

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 seventh (see figure). Next, this second FRP pipe 12
connects the slit portion 121 to the second joint portion 23 of the joint 10
and insert the tips of the four third clip members 3 into
4 is used to connect and couple to the second coupling part 23 of the joint 10.

Further, the third to ninth FRP pipes 13 to 19 are each connected to the third to ninth coupling portions 24 of the joint 10 by using four third clip members 34 in substantially the same way as the second FRP pipe 12 described above. - 30, and its explanation will be omitted here for convenience.

And the 10th and 11th FRP pipes 20.21
As shown in FIG. The clip member 33 is fixed so as to sandwich each inclined joint portion 31 that becomes the tenth and eleventh joint portions of the joint 10. Therefore, the tenth and eleventh FRP pipes 20,
21 is inserted into the first clip member 32 supported by each inclined joint part 31 and adhesively connected thereto.

Here, as described above, the first to eleventh FRP pipes 11
. In this case, the reinforcing plate 35 is provided with a screw hole 351 at a predetermined position, and a panel such as a honeycomb panel (not shown) is screwed into the screw hole 351.

That is, in the pipe joint device configured as described above, when the first to eleventh FRP pipes 111 to 21 are connected to the truss structure by the joint 10 and the first to third clip members 32 to 34, the joint The strength and rigidity of 10 is sufficiently improved by the pipe adhesive bond and the reinforcing plate 35.

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 has a joint portion on the outer periphery of a fitting portion into which a pipe formed of substantially the same advanced composite material as the FRP pipe fits. By using a joint and a clip member that can be adhesively connected to a truss structure, it is possible to promote reliability as much as possible compared to the conventional connection joint made of metal material, and to The structure is simplified and the manufacturability can be improved, and the assembly workability can be improved as much as possible.

Further, in the above embodiment, a reinforcing plate 35 is provided on one end surface of the joint 10.
Although the configuration is such that it is secondarily connected 1 (retrofitted), the present invention is not limited to this, and configurations as shown in FIGS. 9, 10, and 12 are substantially equally effective.

First, FIG. 9 shows the second to ninth coupling parts 23 to 3 of the joint 10.
A reinforcing rib 36 is integrally molded between each of the holes.

FIG. 10 shows the second to ninth joints 23 of the joint 10.
It is constructed such that reinforcing ribs 37, which are separately molded, are secondarily bonded between .

Moreover, FIG. 11 shows the second to ninth coupling parts 23 to 23 of the joint 10.
A plate-shaped reinforcing plate 38 is attached between the 30 and 30, and this plate 38 is attached to the second to ninth FRPs using a substantially right-angled clip member 39 as shown in FIG.
It is configured to be adhesively bonded together with the pipes 12 to 19.

Furthermore, the present invention molds the joint 10 in each of the above embodiments by dividing it into two parts as shown in FIG.
By configuring these to be adhesively bonded,
Furthermore, it is possible to expect effective effects such as improvement in the ease of making one work.

Furthermore, in each of the above embodiments, the truss structure was constructed using 11 FRP pipes, but the present invention is not limited to this and is applicable. Therefore, it goes without saying that this invention can be modified in various ways without departing from the gist of the invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a support structure to which the present invention is applied;
FIG. 2 is a configuration explanatory diagram showing a pipe joint device according to an embodiment of the present invention, and FIGS.
7 and 8 are operation explanatory diagrams shown to explain the assembly operation of FIG. 2, respectively,
FIGS. 9 to 13 are configuration explanatory diagrams showing other embodiments of the present invention. 10...Joint, 11-21...1st to 11th FR
P pipe, 22...fitting part, 23-30...second-
Ninth coupling part, 31... inclined coupling part, 32... first
Clip member, 33...Second clip member, 34
...Third clip member, 36.37...Rib, 3
8... Plate, 39... Clip member. Applicant's representative Patent attorney Takehiko Suzue Figure 2 (b) Figure 3 Figure 4 (C) (b) Figure 5 (b) (a) Figure 6 (a) (b) Figure 7 Figure 10 Figure 13

Claims (1)

[Claims] A pipe formed of a tip composite material, and a tip that connects the pipe to a truss structure, the tip having a fitting portion into which the pipe is fitted and a coupling portion provided radially around the outer circumference of the fitting portion. A pipe joint device comprising: a joint made of a composite material; and a clip member made of the advanced composite material for attaching the pipe to the joint.