JPS6117024Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aquarium reinforcing material having a threaded end for connection, such as a tension rod, diagonal reinforcing brace, etc. used inside an aquarium.

Conventionally, aquarium reinforcing materials having threaded ends for connection that have been used inside aquariums, etc., are shown in Figures 1-
There is something like the one shown in Figure 3. Figure 1 shows a case in which a connecting slot 1 is connected and reinforced between opposing side walls in order to prevent the side walls of the panel aquarium from swelling due to water pressure. Four unit panels 2 with corner reinforcing material 3 on the inner surface of the side wall of the aquarium where they meet each other.
Each unit panel is fixed with bolts 4 at the corners of the panel, and the stress is distributed over the four unit panels.
Mounting plates 5, 5 are provided on the corner reinforcing plate 3 in parallel and spaced apart, and the large diameter connecting portion 6, which is integrally provided at the connecting end of the tension rod 1, is inserted between the mounting plates 5, 5, and the pin Or it is attached by bolt 7.
Figure 2 shows the large diameter connection part 6 and the tension rod 1.
The rod end of the tension rod 1 is screwed into the center threaded hole 8 of the connecting piece 6 by its outer circumferential thread 9 to connect it. FIG. 3 shows a turnbuckle 10 used in combination with the tension rod 1 described above.

Conventionally, metal parts have generally been used as the above-mentioned reinforcing materials, and stainless steel materials have been used for rust prevention.

However, the sodium hypochlorite contained in tap water as a sterilizer can cause rust on stainless steel materials, and seawater may accumulate in the aquarium.
In this case, there was a problem in that even if the material was made of stainless steel, it would corrode in about a year and would no longer serve as a reinforcing material.

This invention was made in view of the above points,
The purpose is to provide a water tank reinforcement material for FRP materials, not only to reduce the reinforcement due to rust or corrosion of metal reinforcement materials, but also for sanitary reasons.

FRP aquarium reinforcement materials can be made using the hand lay-up method, Primix mold molding method, Primix injection molding method, etc. using short glass fibers cut to a certain length or woven glass fibers, and continuous glass fiber roving. One that is impregnated with resin and then pultruded is considered.

However, the former type of FRP using short glass fibers has only 20 to 50% of the strength of stainless steel, making it insufficient for tension rods and diagonal reinforcement stays, and the latter type of continuous glass fiber roving. Although pultrusion molded products made using the same materials can be used as reinforcement materials for aquariums in terms of strength,
If a connecting thread is cut or a pin hole is drilled at the end for use as a tension rod or diagonal reinforcing stay, the glass fibers are cut, resulting in a problem in that the strength is reduced to the same level as the former.

According to the present invention, the above-mentioned problem of strength reduction caused by cutting the connecting screws etc. at the ends has been solved, and in order to satisfy both strength and function, continuous glass roving is used as the core material. Using pultruded material, a primix-molded outer layer of short glass fibers is provided on at least both ends of the core material. Even if connection screws or pin holes are provided in the outer layer of Primix molding, the effect of cutting the glass fibers is small and the strength of the continuous glass fiber roving can be maintained.
Strength equivalent to stainless steel reinforcement can be obtained.

4 and 5 show the end of the tension rod 1 according to the present invention, and as shown, a roving in which continuous glass fibers are oriented in the longitudinal direction of the tension rod 1, which is the direction of the tensile stress, is impregnated with resin. FRP with pultruded roving
The core material 12 is provided to extend over the required length of the tension rod 1, and a Primix molded outer layer 13 of short glass fiber is injection molded around the outer periphery of the connecting portion of both ends of the FRP core material 12 by this roving, and the connecting pin holes 14 are connected at both ends. An example provided at the end is shown. In order to obtain sufficient bonding strength between the core material 12 and the outer layer 13 to transmit the load applied to the FRP outer layer 13 by the short fibers to the FRP core material 12 by the roving, the edge of the core material where the FRP outer layer 13 is to be integrally formed is The outer circumferential surface is undercut, provided with many small indentations, or has a rough surface finish or a spiral groove (not shown), and thereby the FRP core material 12 and the FRP outer layer 13 made of short fibers are bonded by roving. It is better to increase the mechanical bond strength.

FIG. 6 shows an example in which a screw 15 is provided on the outer periphery of the outer layer 13 in the example shown in FIG. Outer circumference screw 15
can also be molded simultaneously with the injection molding of the outer layer 13. Additionally, in order to increase the strength of the threaded part, the nut and connection socket can be made longer than the JIS standard to increase strength.

FIG. 7 shows that not only the ends of the tension rod are connected, but also the entire length of the core material 12, which is made of continuous glass fiber roving, is integrally injection molded with a premix-molded outer layer 16 made of short glass fibers having a cut length around its outer periphery. An example is shown in which pin holes 14 and screws 15 are provided at both ends.

According to the present invention, at least both ends of the FRP core material 12 made of continuous glass fiber roving are made of premix fibers of cut length short glass fibers.
By providing the FRP outer layer 13, even if connection screws or pin holes are provided at both end connections, it is easy to use reinforcement materials such as tension rods or diagonal reinforcement stays that have the same strength as stainless steel ones. It can be used as an aquarium reinforcing material without the problems of rust and corrosion, improves the sanitary properties of tap water, and can be applied to seawater as well. There are some effects that can be expected.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views showing the connecting parts of conventional aquarium reinforcements, Figure 3 is a sectional view of the turnbuckle portion of a tension rod conventionally used as an aquarium reinforcement, and Figure 4 is a structure according to the present invention. 5 is a longitudinal sectional view of the end of the tension rod shown in FIG. 4; FIG. 5b is a sectional view taken along line A--A in FIG. 5a; FIGS. FIG. 7 is a partial cross-sectional view of a tension rod showing another embodiment of the invention. 1... Tension rod, 12... Core material, 13
...Outer layer, 14...Pin hole, 15...Screw, 16
...outer layer.

Claims (1)

[Scope of utility model registration request] An aquarium reinforcing material comprising an FRP core material made of continuous glass fiber roving, and an FRP outer layer made of short glass fiber primics integrally bonded to at least the end connection portion of the FRP core material.