JP4972385B2 - Manufacturing method of floor substrate for electric floor heating - Google Patents

Description

  The present invention relates to a floor base material for electric floor heating and a manufacturing method thereof, and more particularly to a floor base material for electric floor heating and a manufacturing method thereof that can prevent warping.

  As a floor base material for electric floor heating, a floor base material having a recess for accommodating a heater panel such as a PTC heater on the back surface of the floor base material is known (see Patent Document 1, etc.). FIG. 5 shows an example of this, and the floor base material 1 is usually made of plywood, and the recess 2 for housing the heater panel 3 is cut by a gang saw or the like having a rotary blade on the back surface. The heater panel 3 is assembled in the formed heater panel housing recess 2 and a back plate 4 is attached to provide a flooring for electric floor heating. In FIG. 5, reference numerals 5 and 6 denote connectors.

The electric floor heating floor material is fixed to the floor base by hammering or nailing, but if the depth of the recessed portion 2 for accommodating the heater panel formed on the back surface of the floor base material 1 is too deep, The warp phenomenon that the side male zane side bulges easily occurs due to the impact of time driving or nailing. In order to avoid this, when the floor base material 1 is a plywood such as a 5-ply plywood, a part of the central core layer (original middle layer) remains when the heater panel housing recess is formed by cutting. The height position of the rotary cutting blade is controlled to ensure the required rigidity for the electric floor heating floor base material after the heater panel housing recess is formed.
Japanese Patent Laid-Open No. 10-311548

  If the thickness of the floor base material is sufficient for the heater panel to be accommodated, no particular problem will occur. However, in the case of a plywood floor base material having a thickness of about 12 mm, the heater panel is accommodated. In order to ensure the required rigidity, it is not possible to increase the remaining thickness of the core layer after forming the recesses. The recessed portion for housing the heater panel is cut by a gang saw having a rotating knife. The remaining core layer appears on the cut surface, that is, the bottom surface of the heater panel housing recess, and as long as it is, it can be determined that the product is a non-defective product. However, it is not possible to confirm how much the remaining core layer is thick, that is, whether the minimum reference remaining thickness (for example, 0.2 mm) is ensured.

  A floor base material for which the reference remaining thickness is not ensured is insufficient because it has insufficient rigidity and is rejected. If defective products with insufficient remaining core layer thickness can be detected quickly and easily during cutting, it is necessary to obtain only the floor base material for electric floor heating that will not warp during construction. Can do.

  An object of this invention is to provide the floor base material for electric floor heating which can solve said subject, and its manufacturing method.

  The floor substrate for electric floor heating according to the present invention is a floor substrate for electric floor heating in which a recessed portion for accommodating a heater panel is formed on the back surface of a floor substrate made of plywood, and the bottom surface of the recessed portion for accommodating a heater panel Is located in the core layer, which is the center layer of the plywood, and a notch groove having a width that is narrower than the width of the floor base material is partially or entirely formed on the bottom surface. The groove depth of the notch groove is substantially equal to the minimum value of the reference remaining thickness that should be left in the core layer when the heater panel housing recess is formed.

  In the floor base material for electric floor heating described above, since the plywood usually intersects the grain direction for each layer, by visually observing the bottom surface of the narrow notch groove, the bottom surface of the notch groove Is easily located in the core layer, which is the central layer of the plywood, or beyond the core layer, the layer next to the core layer (for example, a crossband layer) can be easily recognized.

  In the floor substrate for electric floor heating according to the present invention, the groove depth of the notch groove is the minimum value of the reference remaining thickness that should be left in the core layer when the heater panel housing recess is formed. Therefore, when the heater panel housing recess is cut as designed, the bottom surface of the notch groove is located in the core layer, and the electric floor It can be determined easily and reliably that the floor base material for heating is a non-defective product.

  Due to the convenience of the cutting machine or the convenience of the floor base material, which is a plywood, the heater panel housing recess is cut to a depth exceeding the design value, thereby remaining thickness remaining in the core layer. When the thickness becomes smaller than the minimum value of the reference remaining thickness, the bottom surface of the notch groove reaches the layer next to the core layer. Since the grain direction is different between the core layer and the next layer as described above, this can be easily and reliably recognized, and can be reliably eliminated as a defective product at the cutting work site.

  A floor panel for a good electrical floor heating is attached to the back side with a heater panel such as a PTC heater and a back plate, etc., and is used as an electric floor heating floor material, and it goes to the construction site. Therefore, it is possible to avoid a warping phenomenon that the side male zane side swells due to the influence of hammering or nailing during construction at the construction site. Further, the notch groove has a width as narrow as, for example, about 1 mm and a shallow depth as compared with the width of the floor base material, and the rigidity of the floor base material for electric floor heating is formed by forming the notch groove. Will not drop.

  In addition, in the floor base material for electric floor heating described above, when a 5-ply plywood having a thickness of about 12 mm is used as the floor base material, the minimum value of the reference remaining thickness to be left in the core layer is about Usually, it is about 0.2 mm.

  The present invention provides a method of manufacturing a floor base material for electric floor heating for the floor material for electric floor heating as described above, using a rotary cutting tool having a predetermined width on the back surface of the floor base material made of plywood. A method of manufacturing a floor base material for electric floor heating by cutting a recess for accommodating a panel, wherein the rotary cutting tool has a width narrower than a width of the blade body general part and a diameter of the blade body general part. A plywood having a protruding blade body having a larger diameter than that of the heater panel housing recess to be formed so that the protruding distance of the protruding blade body from the blade blade general portion is to be formed. There is also disclosed a method for producing a floor base material for electric floor heating, characterized by using a rotary cutting tool that is substantially equal to the minimum value of the reference remaining thickness to be left in the layer.

  In the manufacturing method described above, which layer is the plywood layer on which the bottom surface of the heater panel housing recess is located depends on the number of plywood layers, the thickness of the plywood, or the heater panel housing recess What is necessary is just to select suitably according to the rigidity etc. which are required for the floor base material for electric floor heating. Further, as the rotary cutting tool, a rotary cutting tool in a conventionally known cutting apparatus such as a gang saw can be used as appropriate.

  As an example, the plywood as the floor base material can be a plywood such as a 3-ply, a 5-ply, and a 7-ply. Preferably, a 5-ply plywood is used, and the bottom surface of the heater panel housing recess is the plywood. It is a preferable aspect that the recess for accommodating the heater panel is cut so as to be positioned in the core layer which is the center layer. In that case, when the 5-ply plywood used as the floor base material has a thickness of about 12 mm, the protruding distance of the protruding blade body from the blade body general part is preferably about 0.2 mm. is there.

  In the above manufacturing method, the bottom surface of the notch groove formed by the protruding blade body provided on the rotary cutting tool when the heater panel housing recess is cut on the back surface of the floor base material using the rotary cutting tool. Will continue to observe. And if it turns out that it is inferior goods as demonstrated in the invention which concerns on the said floor base material for electric floor heatings, a cutting process will be interrupted at that time. As a result, only good floor substrates for electric floor heating can be manufactured.

  By adopting the floor base material for electric floor heating and its manufacturing method according to the present invention, a heater panel such as a PTC heater and a back plate are attached to the back surface of the floor base material for electric floor heating. It is possible to easily and reliably avoid the occurrence of a warp phenomenon such that the side male zane side is swollen due to the influence of hammering or nailing when carrying in the floor heating construction at the construction site.

  Hereinafter, the present invention will be described by way of embodiments with reference to the drawings. FIG. 1 shows a cross section of a 5-ply plywood as an example of a floor base material for electric floor heating. FIG. 2 shows an example of the rotary cutting tool, and FIG. 3 shows a state where the heater panel housing recess is cut on the floor base material by the rotary cutting tool shown in FIG. FIG. 4 shows an example of a floor substrate for electric floor heating according to the present invention as seen from the back side.

  In this example, the floor substrate 10 for electric floor heating is made using 5-ply plywood. The 5-ply plywood is composed of a face layer 11 having a thickness of about 1 mm, a cross-band layer 12 having a thickness of about 2 to 3 mm, and a core layer having a thickness of about 4 to 6 mm (see FIG. 1). Original) 13, a laminated structure of a cross band layer 14 having a thickness of about 2 to 3 mm and a back layer 15 having a thickness of about 1 mm. The grain directions of adjacent layers intersect each other. A side male zane 16 and a side female zane 17 are formed on both sides of the base material 10 in the longitudinal direction. Although not shown in FIG. 1, a male zane and a female zane are also formed on both sides in the short direction. In addition, the floor base material 10 by such a 5-ply plywood is known conventionally.

  As described with reference to FIG. 5, the heater panel housing recess 20 is cut by the rotary cutting tool 30 on the back surface side of the floor base material 10. FIG. 2 shows an example of a rotary cutting tool 30 used for cutting, and includes a blade body 32 formed of a plurality of rotary cutting blades attached to a rotary shaft 31. The lateral width W of the blade body 32 is equal to the lateral width a (see FIG. 4) of the heater panel housing recess 20 processed into the floor base material 10. The diameter d of the general part of the blade body 32 is larger than twice the depth of the heater panel housing recess 20 processed into the floor base material 10 (see FIG. 3), and the vicinity of the central part in the width direction of the general part of the blade body 32. Is attached with a projecting blade 33 having a diameter larger than that of the general portion of the blade and a narrow width.

  The protruding distance s of the protruding blade body 33 from the blade body general portion 32 is set as follows. That is, the rotary cutting tool 30 shown in FIG. 2 is attached to a cutting machine such as a gang saw (not shown), and while receiving position control from the cutting machine, a predetermined depth is formed on the back surface of the floor base material 10 as shown in FIG. In this case, the bottom surface 21 of the recess 20 for accommodating the heater panel is made of a 5-ply plywood so that the processed floor base material 10 has a required rigidity. Cutting is performed so as to be located in the core layer 13 and leave a remaining thickness P (reference remaining thickness) of, for example, 0.2 mm or more in the core layer 13. The projecting distance s of the projecting blade body 33 from the blade body general portion 32 is equal to or slightly shorter than the minimum value of the reference remaining thickness P.

  FIG. 3 shows a state in which the heater panel housing recess 20 is cut using the rotary cutting tool 30 provided with the protruding blade body 33 as described above. The bottom surface 23 (see FIG. 4) of the notch groove 22 formed by the protruding blade body 33 is located in the core layer 13 and does not reach the crossband layer 12. By observing the bottom surface 23 of the notched groove 22 after cutting, it can be confirmed that the cutting process of the heater panel housing recess 20 is proceeding normally.

  When the cutting of the heater panel housing recess 20 becomes deeper than planned, the bottom surface 23 of the notch groove 22 reaches the crossband layer 12, which is a layer below the core layer 13. The grain direction of the crossband layer 12 is different from the grain direction of the core layer 13, and it can be easily recognized that the crossband layer 12 has been reached. That is, this state indicates that the thickness of the core layer 13 below the bottom surface 21 of the heater panel housing recess 20 is thinner than the reference remaining thickness P, which is insufficient in rigidity and defective. is there. Immediately eliminated.

  The floor substrate 10 for electric floor heating after cutting is shown in FIG. 4, and the heater panel 3 is assembled in the processed heater panel housing recess 20 in the same manner as in the prior art. By attaching it, the floor material is used for electric floor heating. A non-defective floor substrate 10 for electric floor heating is used as a floor material for electric floor heating, and there is no warping during construction.

Sectional drawing which shows the 5-ply plywood as an example of the floor base material for electric floor heating. The perspective view which shows an example of the rotary cutting tool used by this invention. The figure which shows the state which cuts the recessed part for heater panel accommodation to the floor base material with the rotary cutting tool shown in FIG. The figure which shows an example of the floor base material for electric floor heating by this invention seeing from the back surface. The figure explaining an example of the flooring for electric type floor heating.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Floor base material for electric floor heating, 11 ... Face layer, 12, 14 ... Cross band layer, 13 ... Core layer, 15 ... Back layer, 20 ... Recess for heater panel accommodation, 21 ... Recess for heater panel accommodation Bottom surface, 22 ... Notch groove formed in the bottom surface of the recess for housing the heater panel, 23 ... Bottom surface of the notch groove, 30 ... Rotary cutting tool, 31 ... Rotating shaft, 32 ... Blade body (blade body general part) 33 ... Projecting blade

Claims (2)

  A method of manufacturing a floor base material for electric floor heating by cutting a recess for accommodating a heater panel using a rotary cutting tool having a predetermined width on the back surface of a floor base material made of plywood, as the rotary cutting tool, A protruding blade body that is narrower than the blade body general part and larger in diameter than the blade body general part in part, and the protruding distance of the protruding blade body from the blade body general part is An electric type using a rotary cutting tool that is substantially equal to the minimum value of the reference remaining thickness to be left on the plywood layer where the bottom surface of the heater panel housing recess to be formed is located Manufacturing method of floor base material for floor heating. A 5-ply plywood is used as the floor base material, and the heater panel housing recess is cut so that the bottom surface of the heater panel housing recess is positioned in a core layer that is a central layer of the plywood. The manufacturing method of the floor base material for electric floor heatings of Claim 1 .

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