JPH02225809A - Joint for framework structure member - Google Patents

Abstract

PURPOSE:To prevent peeling with a simple structure by composing a joint of a core joint on which an engagement part and connecting plates of a framework structure member are projected, a sub-joint having first and second contact parts contacted to the core joint, and a crip part which is circularly contacted to the second contact part and fitted at its outer periphery in the framework structure member. CONSTITUTION:An engagement part 51A for fitting an FRP pipe and spiral connecting plates 51b are arranged on a core joint 51. On a sub-joint 52a contacting to the core joint, a first contacting part 52a corresponding to the engagement part 51a and a second contacting part 52b are formed in response to one side of each of the contact plates 51b. Two of the sub-joints 52 are in contact to the connecting plate 51b while sandwiching it, and reinforcing rings 54 are fixed to both ends thereof. Then, crip members 53 are circularly connected to the second contact part 52b to form an engagement part of an FRP pipe. It is therefore possible to surely prevent peeling with a simple structure and thereby to improve strength.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a frame structure such as an antenna reflector support structure constructed for example in an artificial satellite or a space base. The present invention relates to a frame structure member connecting joint used to connect a frame structure member formed in the shape of a vibrator or rod from a composite material to a frame structure such as a truss structure.

(Prior Art) In recent years, in this type of frame structure, CFRP (Carbon Fiber Re1n) has been used instead of metal materials such as aluminum from the viewpoint of weight reduction and thermal expansion.
Products using advanced composite materials such as forced plastics are now being used.

FIG. 3 shows frame structure member connection joints used in such conventional frame structures, for example, the first to eleventh joints.
The corner-to-blade ends of the FRP vibes 11 to 21 are connected to the truss structure via a joint 10.

As shown in FIG. 4, this joint 10 is made by laminating multiple layers of bleb rings 10a made of FRP or the like, and then subjected to heat and pressure molding.
A first joint 22 as shown in FIG. 3 is formed. Second to ninth coupling parts 23 to 30 for coupling a vibrator are radially formed on the outer periphery of the first coupling part 22 . Of these, 2nd and 4th. Sixth and eighth coupling parts 23, 25.2
At 7°29, slanted joints 31 (only two are shown in FIG. 5), which are the tenth and eleventh joints, are formed with an inclination angle H corresponding to the frame structure. This joint 10 has a first F at its first coupling portion 22.
While the RP vibe 11 is fitted, the second to ninth
The second to eleventh FRP vibes 12 to 21 are joined to the joint parts 23 to 30 and the inclined joint part 31 by selectively using the first to third clip members 32 to 34, and one side thereof For example, a disk-shaped reinforcing plate 35 is adhered to the.

As shown in FIG. 6, the first clip member 32 is formed into a substantially cylindrical shape corresponding to the outer diameter of the vibrator, and an inclined portion 321 is formed at the tip thereof corresponding to the inclined coupling portion 31. has been done. Guide grooves 322 into which the inclined coupling portions 31 are inserted are formed at both upper and lower ends of the inclined portion 321 up to predetermined positions in the axial direction.

Further, the second shoe rib member 33 is as shown in FIG.
It is formed in a substantially semicircular shape corresponding to the first clip member 32, and a gap 331 is formed in the axial direction of the curved portion corresponding to the inclined portion 321 of the first clip member 32.

As shown in FIG. 8, the third clip member 34 has a rear tube surface portion 34 which is attached to the connecting surface of the joint 10.
1 and a curved portion 342 that connects to the outer diameter of the vibrator.

Note that the first to third clip members 32 to 34 and the reinforcing plate 35 are each formed by laminating multiple layers of composite material prepregs, similarly to the joint 10 described above.

In the above configuration, the first to eleventh FRP vibrators 11
- 21 are the joint 10 and the first to third clip members 32
~ 34 and are bonded to the truss structure using an adhesive as described below.

That is, the negative end of the first FRP pipe 11 is inserted into the first joint 22 of the joint 10 and joined at a predetermined position. When the second FRP vibe 12 is attached to the second joint 23 of the joint 10, the second joint 23 is first inserted into the tip through a slit 121 (see Fig. 9). form. Next, this second FRP pipe 12
connects the slit portion 121 to the second joint portion 23 of the joint 10
The third to ninth FRPs 13 to 19 are respectively fitted to the second joint part 23 of the joint 10 using the four third clip members 34. Almost similarly to the second FRP vibe 12, four third clip members 34 are used to connect the third to 'X49 of the joint 10.
It is joined to the joint parts 24 to 30 of.

Furthermore, in the tenth and eleventh FRP vibes 20 and 21, as shown in FIG.
They are fixed so as to sandwich the respective inclined joint parts 31 that become the 0 and 11th joint parts. Thereafter, one end of each of the tenth and eleventh FRP vibes 20.21 is inserted into the first clip member 32 supported by each inclined joint portion 31 and joined. A reinforcing plate 35 is joined to one side of the joint 10.

By the way, in a frame structure using such a frame structure member connection joint, it is required to transmit a load in the axial direction of the vibrator, that is, an axial force, but a large force for transmitting a moment load is not required. It has the following characteristics. However, in the above-mentioned conventional frame structural member connecting joint, due to the joint structure, when the bleb rings 10a are laminated in multiple layers and the second to ninth joint parts 23 to 30 are formed radially with respect to the first joint part 22. In addition, since a gap is created at the confluence, this gap must be filled with the resin 10b, which reduces the risk of beering (peel-off stress) occurring near the confluence when an axial force is applied. had.

(Problem to be solved by the invention 'XJ) As stated above, in the conventional frame structural member connection joint,
When axial force is applied, there is a risk that peeling will occur.

This invention has been made in view of the above circumstances, and is a frame structural member connecting joint that has a simple structure, reliably prevents peeling, and improves strength as much as possible. The purpose is to provide

[Structure of the Invention] (Means for Solving the Problems) This invention provides a frame structure member formed of an advanced composite material,
The frame structure member is connected to the frame structure, and is made of the advanced composite material and has a fitting part into which the frame structure member is fitted and a connecting plate that projects radially on the outer periphery of the fitting part. a nuclear joint, a first joint part joined to a fitting part of the nuclear joint, and a substantially T-shaped second joint part joined to one side of a connecting plate of the nuclear joint. a plurality of side joints formed of the advanced composite material, and a second joint portion of the side joints joined to both sides of the joint plate of the core joint in a substantially circular shape, and the frame structure member on the outer periphery. and a plurality of substantially fan-shaped clip members formed of the above-mentioned tip composite material into which the frame structure member connecting joint is fitted.

(Function) According to the above configuration, after the second joint parts of the pair of side joints are sandwiched and joined to the joint plate of the core joint, the clip member is joined onto these second joint parts, A skeletal structural member is joined to the skeletal structure.

Therefore, the desired axial force can be applied to the frame structural members through the core joints, side joints, and clip members! ! Furthermore, gaps that may occur during manufacturing can be reliably prevented, and peeling can be prevented.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a frame structure member connection joint according to an embodiment of the present invention, in which a frame structure member, for example, an FRP vibrator 5
0 to a frame structure as shown in FIG. 2 to form a frame structure 100.

That is, the frame structure member connecting joint according to the present invention is disposed at, for example, a corner of the frame structure 100, and includes a core joint 51, a plurality of side joints 52, and a substantially fan-shaped joint made of an advanced composite material such as FRP. It is formed by joining a plurality of clip members 53 in order. Of these, the core joint 51 is made of FRP.
It has a cylindrical fitting part 51a into which the vibrator 50 is fitted, and a coupling plate 51b is provided to protrude radially around the fitting part 51a. A first joint part 52a is formed in the side joint 52 to be joined to the peripheral part of the core joint 51, corresponding to the fitting part 51a of the core joint 51.
A substantially T-shaped second joint portion 52b protruding in a substantially perpendicular direction is formed at the intermediate portion of the core joint 51, corresponding to one surface of the joint plate 51b of the nuclear joint 51. A plurality of side joints 52 are joined so that two of them sandwich the joint plate 51b of the core joint 51, and reinforcing rings 54 are attached to both ends of the first joint portion 52a of these side joints 52, for example. be done. The clip member 53 forming a joint portion is joined to the second joint portion 52b of these side joints 52 in a four-way circular shape.

In addition, the above-mentioned nuclear joint 51 has the following as its coupling plate 51b:
Since the number of connections of the frame structure members differs depending on the arrangement position in the frame structure, for example, the number corresponding to the number of connections is formed to protrude radially, and the upper and lower ends of the connection plate 51b are provided at both ends of the connection plate 51b, respectively.

After the side joint 52 is joined as described above, this side joint 5
The clip member 53 is joined to the second joint part 52b of the second joint part 52b in a substantially circular shape so as to form a joint part.

In the above configuration, when the FRP pipe 50 is connected to the frame structure, the core joint 51, the side joint 52, and the clip member 53 are joined in order, and then the first FRP vibe 10
The distal end portion of the core joint 51 is fitted into the fitting portion 51a of the nuclear joint 51. At the same time, the outer periphery of the clip member 53 to be joined to the second joint 52b of the side joint 52 is fitted and joined so as to cover the tips of the second and third FRP pipes 50, respectively.

As described above, the frame structural member connecting joint is formed by sequentially joining a core joint 51 made of an advanced composite material, a plurality of sub-joints 52, and a plurality of substantially fan-shaped clip members 53. , it is possible to reliably prevent gaps that cause bealling during manufacturing as in the past, and to cope with the large axial force.

In addition, in the above embodiment, a hollow F is used as a frame structure member.
Although the case has been explained using the RP vibe 50, the structure is not limited to this, and it is also possible to use a solid rod-shaped frame structure member having a concave fitting part formed at the tip. . Therefore, 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.

[Effects of the Invention] As detailed above, according to the present invention, with a simple configuration,
Moreover, it is possible to provide a frame structural member connecting joint that can reliably prevent bealling and improve the strength as much as possible.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a frame structure member connecting joint according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing a frame structure connected to the frame structure using FIG. 1, and FIG. to the first
FIG. 0 is a diagram shown for explaining a conventional frame structure member connection joint. 50... FRP vibe, 51... Nuclear joint, 51.
a... Fitting part, 51b... Connection plate, 52... Sub-joint, 52a... First joint part, 52b... Second joint part, 53... Clip member, 54 ...Reinforcement ring. Applicant's agent Patent attorney Takehiko Suzue 51...Nuclear joint 52...Sub-joint Figure 2 Figure 1 Figure 1 Figure (a) Figure 6 Figure

Claims (1)

[Claims] A frame structure member made of an advanced composite material, and a fitting part into which the frame structure member is fitted, and a fitting part in which the frame structure member is inserted, and a part protruding radially from the outer periphery of the fitting part. a nuclear joint formed of the advanced composite material having a joining plate; a first joining part joined to the fitting part of the nuclear joint; and a first joining part joined to one side of the joining plate of the nuclear joint; a plurality of sub-joints formed of the advanced composite material having a substantially T-shaped second joint; and a second joint of the sub-joint joined to both surfaces of the coupling plate of the core joint; A frame structure member connecting joint comprising: a plurality of substantially fan-shaped clip members made of the tip composite material joined in a circular shape and into which the frame structure member is fitted on the outer periphery.