JP5912648B2 - Bus flooring - Google Patents

Description

  The present invention relates to flooring for buses, and more specifically, it uses only domestic timber that is superior in terms of stable supply and price compared to imported timber, and also excellent in fuel efficiency due to vehicle weight reduction, and effective for cedar thinning. It is related to the flooring for buses that considers the global environment.

  Up to now, Apiton material, which is a South Sea material, has been widely used for bus floor materials from the viewpoint of strength. However, because Apiton is imported from overseas, its supply and price are unstable, and more recently, it has been regarded as a problem from the viewpoint of the global environment such as the depletion of forest resources. I came.

  In order to meet such a problem and a request for weight reduction of a vehicle, the use of a composite material as an alternative to an apitone material has been studied and put into practical use. For example, Patent Document 1 discloses a bolster for a truck in which a laminated material of hard wood is bonded to the left and right side surfaces of a central layer made of soft wood. Further, Patent Document 2 proposes a method for manufacturing a vehicle structural member as a method for manufacturing a vehicle structural member having a greater rigidity and impact resistance than the above. Furthermore, Patent Document 3 discloses a vehicle flooring that is strong, lightweight, and inexpensive, as in the case of using hardwood even when the amount of hardwood such as Apiton is reduced. Yes.

Japanese Utility Model Publication No. 3-107285 (claims and others) JP-A-8-164876 (Claims and others) JP 2003-252254 A (Claims and others)

  However, in any of the composite materials described in Patent Documents 1 to 3, a part of the Apiton material is used as the hard wood, and the imported wood cannot be completely excluded. In addition, as a result of focusing on increasing the size of trucks and buses, even if they are excellent in rigidity and impact resistance, the problems specific to buses have not been sufficiently studied.

  On the other hand, Japanese cedar has been planted the most in Japan, and cedar forests can be seen all over Japan, south of Hokkaido. Cedar is widely used in architecture, furniture, sculpture, crafts, tools, etc., and is the most used as domestic wood. However, the current situation is that the timber thinning is not necessarily used effectively.

  Therefore, the object of the present invention is to use only domestic timber that is superior in terms of stable supply and price compared to imported timber, and also excellent in fuel efficiency due to vehicle weight reduction, and by effectively utilizing cedar thinning wood, Providing environment-friendly bus flooring.

  In order to solve the above-mentioned problems, the present inventor has clarified the required characteristics specific to a bus, and from the viewpoint of effective use of cedar thinned wood for flooring specialized for buses, As a result of diligent study on the combination, the present inventors have found that the above problems can be solved by using red pine wood or cypress wood together with cedar thinned wood, and have completed the present invention.

  That is, the bus floor material of the present invention is a composite material in which cedar thinned wood and red pine wood and / or cypress wood are alternately laminated, and is characterized in that red pine wood or cypress wood is used for the surface layer. Is.

  In the bus floor material of the present invention, the number of laminated layers is preferably 3, 5, 7 or 9, and the total laminated thickness is preferably 9 to 21 mm. In addition, the thinned timber of red pine and / or cypress can be used preferably. Furthermore, it is preferable that the antiseptic | preservative is apply | coated to the floor material for bus | baths of this invention, and it is preferable that the catcher agent is further apply | coated.

  ADVANTAGE OF THE INVENTION According to this invention, the floor material for buses which considered the global environment can be provided by utilizing effectively the cedar thinning material. Moreover, the bus floor material of the present invention is superior in terms of stable supply and price compared to imported wood because it uses only domestic timber, and is also excellent in fuel efficiency due to vehicle weight reduction.

It is sectional drawing of the floor material for buses which concerns on one embodiment of this invention.

  Hereinafter, embodiments of the present invention will be specifically described.

  The preferred flooring material 1 for a bus according to the present invention shown in FIG. 1 includes a red pine thinning material and / or a cypress thinning material 2 and a cedar thinning material 3 which are alternately laminated and a red pine wood material 2 is used as a surface layer. It has a layered structure of layers. In the present invention, the required properties required for flooring for buses satisfy all of the shrinkage rate, water absorption property, compression property, bending strength, corrosion resistance, sound transmission loss performance and environmentally hazardous substance (VOC) levels. Based on the knowledge that it is important to obtain, we studied diligently the combination of various domestic timber and cedar thinned wood. As a result, it was found that the combination with red pine wood and / or cypress wood can satisfy all of the above required characteristics. The combinations in the present invention are specifically three types: a combination of cedar thinned wood and red pine wood, a combination of cedar thinned wood and cypress wood, and a combination of cedar thinned wood, red pine wood and cypress wood. .

  Pinus densiflora has the characteristics that it is lightweight as a construction wood and has high strength, but there is a problem that pine resin oozes out at high temperatures. However, it has been found that this is not a problem in use as a flooring material for baths, and that thinned wood can be suitably used for red pine wood. In addition, larch wood of the same Pinaceae family is actively planted in Nagano and Yamanashi prefectures because it is suitable for mass production because it is easy to grow seedlings, has good rooting, and grows quickly. Although it was tried to use from the viewpoint of availability, it was found that there are many nodes, and that the nodes cause the deterioration of the surface quality. Therefore, larch materials are not suitable for the bus floor board of the present invention.

  In addition, cypress wood is known to be excellent in decay resistance, but it has been unclear whether it can withstand use as a flooring for a bus in terms of strength and the like. However, as a result of extensive research, the present inventors have found that cypress wood can be applied to bath flooring as well as red pine wood.

  The preferred bus flooring 1 of the present invention shown in FIG. 1 has a laminated structure of five layers as a whole, but is not limited to five layers in the present invention. However, in order to sufficiently satisfy all of the above-mentioned required characteristics required for a flooring for a bus, it is preferably a 3, 5, 7 or 9-layer structure, and pine or cypress is arranged on the front and back layers. It is preferable to do so. Further, the total laminated thickness is preferably in the range of 9 to 21 mm. The number of layers to be laminated and the thickness of each layer are not necessarily limited. For example, the layer thickness is 9 mm for 3 layers, 12 mm or 15 mm for 5 layers, 18 mm or 21 mm for 7 layers, etc. Can do.

  The method for producing a flooring material for a bus according to the present invention can employ a known method for producing a laminated material for lamination, for example, phenolic, resorcinol-based, olefinic-based, vinyl acetate resin emulsion-based, aqueous polymer. -It can manufacture by apply | coating and pressurizing known adhesives, such as isocyanate type. In addition, in order to improve the corrosivity, the bath floor material of the present invention is applied with a preservative such as a known wood preservative, or in order to satisfactorily clear the standard value of environmentally hazardous substances (VOC). A catcher agent may be applied. Examples of such catcher agents include aldehyde catcher agents such as organic amide-based composites that are commercially available.

EXAMPLES Next, although an Example demonstrates this invention, this invention is not limited at all by these examples.
Example 1
As shown in FIG. 1, five layers of red pine thinning (2.8 mm thick) and Japanese cedar thinning (3.5 mm thick) are alternately stacked so that red pine thinning is arranged on the surface layer. The structure. For each layer, a commercially available alkali phenol adhesive was applied and pressed according to a conventional method to bond each layer, and then surface finishing was performed. Finally, a cedar plywood having a total layer thickness of 15 mm was obtained. Next, a commercially available preservative and aldehyde catcher agent were applied to the obtained cedar plywood.
Example 2
As shown in FIG. 1, cypress thinning material (thickness 2.8 mm) and cedar thinning material (thickness 3.5 mm) are alternately laminated so that cypress thinning material is arranged on the surface layer, and five layers The structure. For each layer, a commercially available alkali phenol adhesive was applied and pressed according to a conventional method to bond each layer, and then surface finishing was performed. Finally, a cedar plywood having a total layer thickness of 15 mm was obtained. Next, a commercially available preservative and aldehyde catcher agent were applied to the obtained cedar plywood.
Example 3
As shown in Fig. 1, red pine thinnings (thickness 2.8mm) and cedar thinnings (thickness 3.5mm) are alternately stacked so that the red pine thinnings are arranged on the surface layer. Only the layer had a five-layer structure as the cypress thinning material of Example 2. For each layer, a commercially available alkali phenol adhesive was applied and pressed according to a conventional method to bond each layer, and then surface finishing was performed. Finally, a cedar plywood having a total layer thickness of 15 mm was obtained. Next, a commercially available preservative and aldehyde catcher agent were applied to the obtained cedar plywood.
Reference Example Apiton plywood having a thickness of 15 mm and a laminated number of 7 layers conventionally used as a flooring material for buses was produced using the same adhesive and bonding method as in the examples.

The following test was implemented with respect to each plywood of Examples 1 to 3 and Apiton plywood of Reference Example.
(Shrinkage rate test)
After leaving each test body of each plywood of Examples 1 to 3 and Apiton plywood in an atmosphere of 70 ± 1 ° C. and −30 ± 1 ° C. for 48 hours, the length, width and thickness of each test body were measured, The amount of shape change due to temperature was evaluated. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in using the flooring material for the bus in terms of the shrinkage rate in the same manner as the Apiton plywood.
(Water absorption test)
Each specimen of Examples 1 to 3 and each specimen of Apiton Plywood were immersed in water at 25 ± 1 ° C. for 24 hours, and then the mass of each specimen was measured to evaluate the amount of change in shape due to water content. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in using the flooring material for the bus in terms of water absorption, like the papiton plywood.
(Compression test)
Each plywood of Examples 1 to 3 and each test body of Apiton plywood were pressed at the center of each test body with a steel rod φ15 mm, and the amount of shape deformation was measured. Moreover, the same measurement was performed on these specimens even when the flooring used for the bath was provided. This test evaluates the amount of shape deformation due to local loads on high heels and umbrellas, and is an evaluation item unique to buses. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in using the flooring material for the bus in terms of local compressibility, like the pipton plywood.
(Upper peeling test)
The floor covering used for the bath was adhered to each test piece of each plywood and apton plywood of Examples 1 to 3, the end of the floor covering was pulled at 50 mm / min, and the maximum value of the peeling resistance was measured. The adhesive strength of the floor covering was evaluated. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in the use of the flooring material for the bus in terms of the adhesive strength of the floor covering, similarly to the Apiton plywood.
(Bending test)
The center of each test piece of each plywood of Examples 1 to 3 and Apiton plywood was pressed and broken, or the load and displacement until bending by 50 mm were measured, and the bending strength and the amount of deflection were evaluated. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in using the flooring material for the bus in terms of the bending strength and the amount of deflection, similarly to the Apiton plywood.
(Corrosion test)
For each test piece of each plywood and apiton plywood of Examples 1 to 3, two kinds of Oozutake and Kawaratake were used, and antibacterial operations were carried out in a dark room at a temperature of 26 ± 2 ° C. and a relative humidity of 70% or more for 12 weeks. did. After the operation was completed, each test specimen was washed with water, dried, and weighed to evaluate corrosion resistance. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in using the flooring material for the bus in terms of corrosion resistance, similarly to the Apiton plywood.
(Transmission sound loss test)
The transmitted sound loss dB was measured at a frequency of 100 to 8000 Hz for each of the plywoods of Examples 1 to 3 and the test bodies of Apiton plywood. Moreover, the same measurement was performed also when these test bodies had the flooring which can be used for a bus | bath. As a result of the evaluation, it was confirmed that each of the plywoods of Examples 1 to 3 had no problem in using the flooring material for the bus in terms of the transmitted sound loss performance as in the case of Apiton plywood.
(Environmentally Hazardous Substance (VOC))
Both the plywood of Examples 1 to 3 and the test specimens of Apiton plywood can be produced without using an adhesive that contains environmentally hazardous substances (VOCs) above the specified value. It was confirmed that there is no problem in using the flooring for buses in terms of environmentally hazardous substances (VOC).

  In the present invention, it is possible to use only Japanese timber without using imported wood, which is imported wood, and can use cedar thinned wood that has not been effectively used so far, and is an environmentally friendly bus. It is extremely useful as a flooring material. Cedar thinned wood and red pine or cypress wood are superior in terms of stable supply and price compared to Apiton. In addition, it has excellent fuel efficiency due to weight reduction of the vehicle. For example, Apiton plywood normally uses 110 kg per bus, whereas the cedar plywood of the present invention requires a usage of about 85 kg, and the light weight effect can be reduced by 22%. Also, in terms of cost, it can be reduced by about 20% per bus compared to Apiton plywood.

1 Bus flooring 2 Red pine 3 Cedar thinned wood

Claims (5)

And thinning the cedar give Sugi, the resulting cedar and red pine material and / or Japanese cypress material by alternately laminating a composite body,
Method for producing a bus flooring, characterized in that Ru with red pine material on the surface layer of the complex. The method for producing a flooring material for a bus according to claim 1, wherein the number of laminated layers is 3, 5, 7 or 9, and the total laminated thickness is 9 to 21 mm. The method for producing a flooring material for a bus according to claim 1 or 2, wherein the red pine wood and / or cypress wood is a thinned wood. The manufacturing method of the flooring material for buses according to any one of claims 1 to 3, wherein a preservative is applied. The manufacturing method of the flooring material for buses in any one of Claims 1-4 with which a catcher agent is apply | coated.