JP3013066U - Lining board - Google Patents

Abstract

(57) [Summary] [Objective] To provide a lightweight and highly rigid lining plate. [Structure] A core material 1 formed by using GFRP into a thick plate and having a large number of lightening holes 11 penetratingly formed along the center of the thickness, and the core material 1 is attached to both front and back surfaces of the core material. By comprising the CFRP layers 2a and 2b, it is possible to achieve weight reduction and rigidity improvement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lining plate that covers a groove dug in road construction or the like.

[0002]

[Prior art]

 Conventionally, when a trench is dug in the road due to water supply work, gas construction, etc., and when the construction will take a long time, the construction will be performed with the road dug covered with a lining plate. May progress.

[0003]

[Problems to be solved by the device]

 Conventionally, a lining plate used for the above-mentioned purpose has been constructed by stacking several steel plates 101 like a lining plate 100 shown in FIG. 4 and laying a rubber mat 102 on the surface thereof. However, since the lining plate 100 described above is composed of the steel plate 101, it is heavy and difficult to transport. In addition, it was necessary to use heavy equipment because it was impossible to carry it by hand during the installation work on site.

The present invention has been made in view of the conventional circumstances as described above, and an object thereof is to provide a lining plate that is light and has high rigidity, as compared with the lining plate as described above. Here it is.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the lining plate of the present invention is formed into a thick plate using GFRP, and a core material is formed by penetrating a plurality of lightening holes along the thickness center thereof. And a CFRP layer attached to both the front and back surfaces of the core material.

Further, the lining plate may be provided with a non-slip layer on the surface of the CFRP layer.

[0007]

[Action]

 According to the above means, a large number of lightening holes are penetratingly formed along the central portion of the thickness of the core material made of GFRP, thereby hollowing the core material and reducing the weight.

CFRP layers are attached to both front and back surfaces of the core material. The CFRP layer has a high elastic modulus and is rich in tensile strength and compression strength. Therefore, bending strength and bending rigidity are improved by attaching the CFRP layer so as to sandwich the core material. Further, in the case where the anti-slip layer is provided on the surface of the CFRP layer, the friction is enhanced to reduce the slip.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The lining plate a1 shown in FIG. 1 is constructed by attaching CFRP layers 2a and 2b on both front and back surfaces of a thick plate-shaped core material 1 made of GFRP, and providing a non-slip layer 3 on the surface.

The core material 1 made of GFRP is formed in a thick plate shape, and is hollowed out by passing through a thinning hole 11 having a rectangular cross section along the thickness center thereof. In the case of the above-mentioned embodiment, three lightening holes 11 are provided side by side, and a web 12 is left between the lightening holes 11 so that the front and back walls of the core material 1 are integrally connected by the webs 12. It The core material 1 is formed by pultrusion using a pultrusion molding die, and after molding, it is withdrawn in the extension direction of the lightening hole 11 to remove the die. The core material 1 configured as described above can be reduced in weight and material cost significantly by providing the hollowed-out hole 11 and having a hollow structure.

Further, cover plates 13 are provided on both side surfaces of the lining plate a1 to close the openings of the lightening holes 11. The cover plate 13 does not necessarily have to be provided, and both ends of the lightening hole 11 may be open.

CFRP using carbon cloth is laminated and attached to both front and back surfaces of the core material 1 to form CFRP layers 2 a and 2 b. The CFRP layers 2a and 2b made of carbon cloth have a high elastic modulus and are rich in tensile strength and compressive strength. Therefore, as described above, if the CFRP layers 2a and 2b are attached with the thick core material 1 sandwiched therebetween, the bending strength and bending rigidity of the lining plate a1 can be effectively increased.

Further, the non-slip layer 3 is formed on the surface of the lining plate a1 configured as described above. The non-slip layer 3 is formed by applying a coating agent obtained by mixing abrasive particles into a phenol resin. The anti-slip layer 3 may be of any type as long as it has the required anti-slip effect, and for example, a rubber plate or the like may be used.

As shown in FIG. 3, the lining plate a1 configured as described above is installed by hanging it over the groove b 1 dug in the road. In addition, slopes are provided by asphalt or the like on the step portions before and after the installed lining plate a1 so as to fill the step generated on the lining plate a1.

Further, the lining plate a1 described above is provided with the non-slip layer 3 on the surface, but unlike the lining plate a2 shown in FIG. 2, the CFRP layer 2a is exposed without providing the anti-slip layer. You may use it as it is.

[0016]

[Effect of device]

 As described above, the present invention is constructed by thinning out a thick-walled core material made of GFRP, and bonding CFRP layers of high strength and high elastic modulus to both front and back surfaces of this core material. Therefore, it is possible to secure sufficient strength and rigidity as a lining plate, and at the same time, it is possible to greatly reduce the weight, which makes it easy to carry and can be carried by hand. Moreover, the installation work for the groove can be easily performed without using heavy machinery.

Further, in the case where the anti-slip layer is provided on the surface of the CFRP layer, the frictional force on the surface of the lining plate can be increased to prevent a slip accident.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lining plate according to the present invention with a part thereof cut away.

FIG. 2 is a perspective view showing a part of a lining plate without a non-slip layer, which is cut away.

FIG. 3 is a perspective view showing a state in which the lining plate of FIG. 1 is installed on a groove.

FIG. 4 is a perspective view showing an installed state of a conventional lining plate.

[Explanation of symbols]

 a1, a2 ... Lining plate 1 ... Core material 2a, 2b ... CFRP layer 3 ... Anti-slip layer

Claims (2)

[Scope of utility model registration request] 1. A core material which is formed into a thick plate using GFRP and has a plurality of lightening holes penetratingly formed along the center of the thickness thereof, and is attached to both front and back surfaces of the core material. CF
A lining plate composed of an RP layer. 2. The lining plate according to claim 1, wherein a non-slip layer is provided on the surface of the CFRP layer.