JP6699997B2 - Tile fixing screw nail - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof tile fixing screw nail for fixing a roof tile over a shackle, an underlaying material and a base plate.

  Conventionally, roof tiles that are used for roofing are fixed to the pier, the roofing material and the ground board by inserting the nail holes formed in the roof tile from the top surface and driving the screw nails in this order Has been done. As this kind of screw nail, when the screw nail is driven, the head that is locked to the upper surface of the roof tile, the cylindrical smooth portion (no screw portion) located in the nail hole of the roof tile, and the pier A screw nail having a screw portion located inside and a retaining portion located inside the underlaying material and the base plate is known (see Patent Document 1).

Japanese Patent No. 4861575

  However, in the conventional screw nail, the length of the smooth portion (non-threaded portion) is the same as the thickness of the roof tile, the length of the screw portion is the same as the thickness of the pier, and the pitch of the ring portion is the same as that of the underlaying material. Since it is thicker than the thickness and the structure of the head formed at one end of the screw part was not fully considered, when the screw nail was driven into the pier, the underlaying material and the ground plate, the head Is locked to the upper surface of the roof tile, the smooth part penetrates the nail hole of the roof tile, the screw part penetrates the inside of the pier, the ring part penetrates the inside of the underlaying material and the ground plate, and the roof tile is fixed. However, in the event of heavy rain such as a typhoon, rainwater penetrates between the roof and the head that is locked on the top surface, and this rainwater passes through the inside of the pier along the spiral valley of the screw part. However, there is a problem that rainwater penetrates into the base plate when the rainwater passes through the inside of the lower lumber through a slight gap between the ring portion and the lower lumber.

  In view of the above-mentioned circumstances, the present invention, in the roof tile fixing screw nail for fixing the roof tile over the stile, the underlaying material and the base plate, prevents rainwater from entering the nail hole of the roof tile as much as possible, and screws. An object of the present invention is to provide a roof tile fixing screw nail capable of improving pulling-out strength of nails and reliably preventing rainwater from entering the base plate.

If the means for achieving the above-mentioned object is shown with the reference numerals of the drawings, the roof tile fixing screw nail 1 according to the invention of claim 1 has a roof tile 11 as a pier 12, a roofing material as shown in FIG. 13 is a roof tile fixing screw nail for fixing over the base plate 14 and the base plate 14, the shaft portion 3, a head portion 2 formed with a large diameter at one end of the shaft portion 3, and a pointed tip at the other end of the shaft portion 3. And a threaded portion 5a including a spiral protrusion 5a1 formed from a portion 2a immediately below the back surface of the head 2 toward the shaft intermediate portion 3a, and a screw portion 5a. And a ring portion 5b formed of a group of annular projections 5b1 formed from the shaft intermediate portion 3a toward the tip portion 4 side subsequent to the portion 5a, and the pitch P2 (FIG. 3) of the ring portion 5b is lowered. It is formed to have a thickness smaller than the thickness T3 (FIG. 4) of the roofing material 13,
In the head portion 2 formed at one end of the shaft portion, as shown in FIG. 5, the screw portion 5a of the shaft portion 3 which is inserted into the nail hole 11a of the roof tile 11 is radially displaced in the nail hole 11a. Then, with the spiral protrusion 5a1 of the threaded portion 5a in contact with the nail hole inner wall 11a1, the distance from the threaded portion center 5aG to the nail hole inner wall 11a2 having the largest deviation distance is a virtual circle having a radius r1. And is formed on the circular head 2 having a radius r2 larger than this,
As shown in FIG. 4, the screw portion 5a of the shaft portion 3 is formed to have a length that extends over the inside of the nail hole 11a of the roof tile 11 and the inside of the pier 12, and the ring portion 5b of the shaft portion 3 is the pier. It is formed in a length that penetrates the field plate 14 from the lower part inside 12
In addition, as shown in FIG. 1, the ring portion 5b has a taper shape in which the outer diameter of the ring portion 5b is reduced from the shaft portion intermediate portion 3a side toward the tip portion 4 side following the screw portion 5a. ..

According to the invention of claim 2 , in the roof tile fixing screw nail 1 according to claim 1 , the pitch P2 (FIG. 3) of the ring portion 5b is in the range of 0.5 mm or more and 1.9 mm or less.

According to a third aspect of the present invention, in the roof tile fixing screw nail 1 according to the first or second aspect, the taper angle a (Fig. 1) of the ring portion 5b is 0.10 degrees or more from the shaft portion midway portion 3a to the tip end portion 4. The structure is within a range of 30 degrees or less.

According to a fourth aspect of the invention, in the roof tile fixing screw nail 1 according to any one of the first to third aspects, the inclination angle d of the inclined ridge surface 5b2 on the tip end 4 side of the annular ridge 5b1 of the ring portion 5b is 3) is formed to be larger than the inclination angle e of the inclined protrusion surface 5b3 on the head 2 side.

  The effects of the present invention will be described below with reference to the reference numerals of the drawings. In the present invention, the pitch P2 (FIG. 3) of the ring portions 5b is smaller than the thickness T3 (FIG. 4) of the lower roofing member 13. , When the ring portion 5b is penetrated into the lower roofing material 13, two or more annular protrusions 5b1 and 5b1 are arranged inside the lower roofing material 13, so that the ring portion 5b and the lower roofing material 13 are separated from each other. The contact area is further increased. Therefore, it is possible to further improve the adhesion between the ring portion 5b and the lower roofing material 13, that is, the sealing property, so that it is possible to reliably prevent the rainwater from entering the base plate 14.

  Further, according to the present invention, when the screw nail 1 is driven over the pier 12, the underlaying material 13 and the base plate 14, the screw portion 5a is guided inside the pier 12 by the spiral ridge 5a1 to rotate spirally. While entering, a spiral locus is formed in the driving part. Therefore, when the screw nail 1 is pulled out from the splint 12, the lower roofing material 13 and the base plate 14, the resistance of the spiral ridge 5a1 is received, so that the pulling-out proof strength can be improved, and the roof tile 11 can be pulled up from the splint 12 and the lower roofing material 13. Also, since the shaft portion 3 has a ring portion 5b formed on the side of the tip end portion 4 and formed of a group of annular projections 5b1, it can be firmly fixed to the ground plate 14, and thus the pier 12, the lower roofing member 13, and When the screw nail 1 is driven into the base plate 14, the ring portion 5b enters the inside of the lower roofing material 13 and the base plate 14. Therefore, when the screw nail 1 is pulled out from the splint 12, the underlaying material 13 and the base plate 14, the pulling resistance of the screw nail 1 can be further improved by receiving the resistance of the annular projection 5b1 of the ring portion 5b.

Further , according to the present invention , as shown in FIG. 5, the screw portion 5a of the shaft portion 3 which is inserted into the nail hole 11a of the roof tile 11 is displaced in the nail hole 11a in the radial direction so that the screw portion 5a A radius larger than a virtual circle whose radius r1 is the distance from the screw portion center 5aG to the nail hole inner wall 11a2 having the largest deviation distance in a state where the spiral protrusion 5a1 is in contact with the nail hole inner wall 11a1. Since the circular head portion 2 of r2 is formed at one end of the shaft portion 3, the screw portion 5a of the shaft portion 3 which is inserted into the nail hole 11a of the roof tile 11 is largely displaced in the radial direction inside the nail hole 11a. However, the head portion 2 formed at one end of the shaft portion 3 always closes the opening end of the nail hole 11a, which prevents rainwater from entering the nail hole 11a through the opening end of the nail hole 11a. Can be prevented.

Further , according to the present invention , the shaft portion 3 includes the screw portion 5a formed on the head 2 side and formed of the spiral protrusion 5a1, and the ring portion 5b formed on the tip end 4 side and formed of a group of annular protrusions 5b1. And the threaded portion 5a of the shaft portion 3 is formed to have a length that extends over the inside of the nail hole 11a of the roof tile 11 and the inside of the pier 12, and the ring portion 5b is a part of the pier 12, the underlaying material. 13 and the whole ground plate 14 are penetrated. That is, the threaded portion 5a penetrates only the inside of the splint 12 and does not penetrate the interiors of the lower roofing material 13 and the base plate 14. In other words, the screw portion 5a penetrates the inside of the upper portion of the pier 12, and the ring portion 5b forms the inside of the lower portion of the pier 12, the entire interior of the lower roofing material 13, and the entire interior of the field board 14. Penetrates through. That is, since the screw portion 5a does not penetrate the interior of the lower roofing material 13 and the base plate 14, even if rainwater enters through the gap between the head 2 of the screw nail 1 and the roof tile 11, the rainwater will not penetrate the screw portion 5a. Is guided by the spiral ridge 5a1 and penetrates into the interior of the pier 12 along the valley 5a2, but the ring 5b following the screw 5a is provided with a large number of annular ridges 5b1 provided adjacent to each other in the axial direction. Therefore, the rainwater is not blocked by the annular protrusions 5b1 and does not enter the valleys 5b4 between the annular protrusions 5b1. Therefore, it is possible to reliably prevent the rainwater from entering the base plate 14. Furthermore, in this case, since the ring portion 5b penetrates a part of the splint 12 and the entire inside of the lower roofing material 13, the contact area between the ring portion 5b and a part of the spar 1 and the lower roofing material 13 is reduced. By increasing the number, it is possible to improve the adhesion between the ring portion 5b and a part of the splint 1 and the underlaying material 13, that is, the sealing property. Therefore, even if rainwater passes along the valley 5a2 of the screw portion 5a and passes through the inside of the pier 12 to a midway portion, it is possible to reliably prevent the rainwater from entering the field board 14.
Further, according to the present invention, the outer diameter of the ring portion 5b is tapered so as to decrease from the head 2 side to the tip 4 side, that is, the outer diameter is from the head 2 side to the tip 4 side. Since it is formed in a taper shape toward, the ring portion 5b is formed so that the through hole gradually expands inside the lower roof material 13 when the screw nail 1 is driven into the pier 12, the lower roof material 13 and the base plate 14. Since the ring portion 5b is driven, the ring portion 5b can be tightly adhered to the inside of the lower roofing material 13 without any gap to improve the sealing property, and the rainwater can be more reliably prevented from entering the base plate 14.

According to the invention of claim 2 , the pitch P2 of the ring portion 5b is in the range of 0.5 mm or more and 1.9 mm or less, and the thickness T3 of the underlaying material 13 is generally in the range of 1.0 mm or more and 4.0 mm or less. Since the pitch P2 of the ring portion 5b is smaller than the thickness T3 of the lower roofing material 13, it is possible to further improve the adhesion between the ring portion 5b and the lower roofing material 13, that is, the sealability, and to the base plate 14. Infiltration of rainwater can be prevented more reliably. In this case, it is preferable that two or more annular protrusions 5b1 and 5b1 are arranged inside the lower roofing material 13.

According to the invention of claim 3 , the taper angle a (FIG. 1) of the ring portion 5b is in the range of 0.10 degrees or more and 0.30 degrees or less from the shaft middle part 3a to the tip portion 4, and is 0.10 degrees. If it is less than or equal to 0.30 degrees, on the contrary, the degree of adhesion to the underlaying material 13 into which the ring portion 5b is driven, that is, the sealing property becomes insufficient, and the degree of adhesion is in the range of 0.10 degrees to 0.30 degrees, That is, the sealing property becomes good, and when the screw 1 is driven into the pier 12, the underlaying material 13 and the base plate 14, there is an effect of further preventing rainwater from entering the base plate 14, and within the above range. In this case, the ring portion 5b can be easily tapered, which is suitable for mass production.

According to the invention of claim 4 , as shown in FIG. 3, the inclination angle d of the inclined ridge surface 5b2 on the tip end 4 side of the annular protrusion 5b1 of the ring portion 5b is the inclined ridge surface 5b3 on the head 2 side. Since the ring portion 5b is formed to have a larger inclination angle e, the inclined projection surface 5b2 on the tip 4 side of the ring portion 5b is driven into the lower roofing material 13 without difficulty when the ring portion 5b is driven into the lower roofing material 13. Adhesion between 5b and the underlaying material 13 is improved, and the sealing property can be more effectively exhibited.

It is a top view which illustrates the screw nail which concerns on embodiment of this invention. It is a top view which expands and illustrates between A and B of the thread part of the same screw nail. It is a top view which expands and illustrates between C and D of the ring part of the screw nail. The same figure shows an example of a state in which the same screw nail is driven from the top surface of a roof tile to a shackle, a roofing material, and a base plate. (a) is a vertical side view showing the whole, (b) is an enlarged view of the E part of the screw part and ring part. FIG. It is an enlarged view which planarly represented the relationship between the head part of the screw nail when the screw nail which concerns on embodiment of this invention is driven in the roof tile, the nail hole of the roof tile closed by this, and a screw part. FIG. 7 is an enlarged plan view showing the relationship between the head of a screw nail when a conventional screw nail is driven into a roof tile, the nail hole of the roof tile closed by this, and the screw portion.

  Embodiments of a screw nail according to the present invention will be specifically described below with reference to the drawings.

  As shown in FIG. 4, the screw nail 1 according to the present invention is a screw nail for fixing a roof tile 11 to a stile 12, a lower roofing material 13 and a base plate 14. The roof tile 11 is a plate-shaped member made of earthenware, has a nail hole 11a through which the screw nail 1 is inserted, and the thickness T1 of the roof tile 11 is generally in the range of 10 mm or more and 20 mm or less, In this embodiment, it is 10 mm. The pier 12 is a square bar made of pine, and the thickness T2 of the pier 12 is generally in the range of 20 mm or more and 30 mm or less, and is 27 mm in the present embodiment. The lower roofing material 13 is a waterproof sheet made of rubber asphalt roofing, and the thickness T3 of the lower roofing material 13 is generally in the range of 1.0 mm or more and 4.0 mm or less, and is 2 mm in the present embodiment. The base plate 14 is a roof base material such as a structural plywood made of cedar, and the thickness T4 of the base plate 14 is generally in the range of 10 mm or more and 30 mm or less, and in the present embodiment, 13 mm. In the present embodiment, the lower roofing material 13 is laid and fixed on the upper surface of the base plate 14, the piers 12 are arranged and fixed on the upper surface of the lower mortar material 13 at a predetermined interval in the flow direction of the roof, and the roof tile 11 is fixed on the upper surface of the pier 12. In the state where the roof tile 11 is laid, the head 2 is locked to the upper surface of the roof tile 11, the nail hole 11a of the roof tile 11 is inserted and the screw nail 1 is driven into the pier 12, the underlaying material 13 and the ground plate 14, Are fixed to the pier 12, the underlaying material 13 and the field board 14.

  As shown in FIG. 1, the screw nail 1 includes a shaft portion 3, a head portion 2 formed at one end of the shaft portion 3 with a large diameter, and a tip portion formed at the other end of the shaft portion 3 in a pointed shape. 4 and 4 are provided. The head part 2, the shaft part 3 and the tip part 4 are integrally formed of a stainless alloy such as SUS304.

  As shown in FIGS. 1 and 4, the head portion 2 has a disk shape (generally a flat head shape) and is a portion for hitting with a hammer or the like when driving the screw nail 1 from the upper surface of the roof tile 11. Is a portion that is locked to the upper surface of the roof tile 11 when the screw nail 1 is driven.

  The present invention has one feature in the structure of the head 2, and will be described in detail with reference to FIG. FIG. 5 is a plan view showing the relationship between the head portion 2 of the screw nail 1 when the screw nail 1 is driven into a roof tile, the nail hole 11a of the roof tile 11 closed by the screw nail 1, and the screw portion 5a of the screw nail 1. FIG.

  Similarly, FIG. 6 is an enlarged view showing in plan view the relationship between the head of a screw nail when a conventional screw nail is driven into a roof tile, the nail hole of the roof tile closed by this, and the screw portion. is there. First, the conventional art will be described. When a screw nail is driven into the pier 12, the underlaying material 13 and the base plate 14 from the nail hole 11a of the roof tile 11, the shaft portion 20 of the screw nail is viewed in plan from the nail hole 11a of the roof tile 11. It is preferable that the shaft portion 20 is driven in a state of being positioned in the center portion, but in reality, the shaft portion 20 is dislocated from the center portion of the nail hole 11a and is radially displaced toward the inner wall 11a1 side of the nail hole 11a, and this displacement is caused. It may be driven while being in contact with the inner wall 11a1. When the shaft portion 20 is radially displaced in the nail hole 11a, the head portion 21 formed at one end of the shaft portion 20 is also radially displaced from the upper surface of the nail hole 11a of the roof tile 11, and the head portion 21 is displaced. 6 separates from the upper surface opening 11a3 of the nail hole 11a, and as shown in FIG. 6, a part P which is not closed by the head 2 is generated in a part of the upper surface opening 11a3, and rainwater is leaked from the opening P. It will penetrate into the hole 11a. Conventionally, there is no consideration of closing the upper surface opening 11a3 of the nail hole 11a of the roof tile 11 with the head 2, and it is unavoidable that rainwater enters the nail hole 11a from the opening P. The idea was that the invading rainwater should be blocked by the underlaying material 13 and the base plate 14.

  On the other hand, the present invention is characterized by the idea of preventing rainwater from entering the nail holes 11a of the roof tile 11 as much as possible, and in the present invention, the configuration of the head 2 is as follows. That is, the screw portion 5a of the shaft portion 3 which is inserted into the nail hole 11a of the roof tile 11 is displaced in the radial direction in the nail hole 11a, and the spiral protrusion 5a1 of the screw portion 5a contacts the nail hole inner wall 11a1. At the time, a circular head 2 having a radius r2 larger than this is applied to one end of the shaft 3 with respect to a virtual circle having a radius r1 from the center 5aG of the screw portion to the inner wall 11a2 of the screw portion having the largest displacement distance. It is supposed to be formed. Thereby, even if the screw portion 5a of the shaft portion 3 inserted into the nail hole 11a of the roof tile 11 is largely displaced in the nail hole 11a in the radial direction, the head portion 2 formed at one end of the shaft portion 3 is always The opening end of the nail hole 11a is closed so that rainwater can be reliably prevented from entering the nail hole 11a from the opening end of the nail hole 11a. As an example, when the inner diameter of the nail hole 11a of the roof tile 11 is 5 mm and the outer diameter of the screw portion 5a of the screw nail 1 is 2.9 mm, the head 2 having an outer diameter of 7.5 mm is attached to one end of the shaft portion 3. By forming the screw portion 5a of the shaft portion 3 in the nail hole 11a in the radial direction, even if the screw portion 5a of the shaft portion 3 is displaced to the maximum in the radial direction, a gap is not generated between the head portion 2 and the nail hole 11a of the roof tile 11. Ingress of rainwater can be prevented as much as possible.

  In this case, in the prior art, the smooth portion (non-threaded portion) of the shaft portion 3 located in the nail hole 11a of the roof tile 11 has an outer diameter larger than that of the screw portion of the shaft portion 3 located inside the pier 12. Has a small diameter, the displacement amount in the nail hole 11a is large, and accordingly, the displacement amount of the head 21 is also large. There was a tendency for the opening P to appear largely due to the large separation.

  However, in the present invention, the threaded portion 5a of the shaft portion 3 located in the nail hole 11a of the roof tile 11 has the same diameter as the threaded portion 5a of the shaft portion 3 located inside the pier 12, etc. Since the diameter is larger than that of the non-screwed portion), the displacement amount of the shaft portion 3 in the nail hole 11a is small by that much, and accordingly, the displacement amount of the head portion 2 is small and the nail hole 11a is small. It is possible to prevent rainwater from entering without being separated from the upper surface opening 11a3.

  As shown in FIG. 4, the shaft portion 3 is formed between the screw portion 5 a and the screw portion 5 a and the tip portion 4 which are directly connected to the back surface side of the head portion 2 and are formed adjacent to each other and each of which is formed of a spiral protrusion 5 a 1. And a ring portion 5b composed of a group of annular protrusions 5b1.

  As shown in FIG. 4, when the screw nail 5 is driven from the upper surface of the roof tile 11 into the pier 12, the lower roofing material 13 and the ground plate 14, the screw portion 5a has the spiral projection 5a1 of the roof tile 11 and the roof tile 11. Located inside the pier 12. The spiral protrusion 5a1 of the screw portion 5a is a multiple thread, and in the present embodiment, is a four thread. The pitch P1 (FIG. 2) of the screw portion 5a is 1.45 mm, the lead angle of the screw portion 5a is 45 degrees, and the angle c of the screw thread of the screw portion 5a is 60 degrees. The outer diameter D2 (FIG. 1) of the threaded portion 5a is 2.9 mm. The length L1 (FIG. 4) of the threaded portion 5a is 33 mm, which is larger than the thickness T1 of the roof tile 11 and smaller than the total length of the thickness T1 of the roof tile 11 and the thickness T2 of the pier 12. .. For this reason, the threaded portion 5a is inserted into the nail hole 11a of the roof tile 11, is located only inside the pier 12, and does not penetrate through the inside of the lower roofing material 13 and the ground board 14.

  As shown in FIG. 4, when the screw nail 1 is driven from the upper surface of the roof tile 11 into the pier 12, the lower roofing material 13 and the ground plate 14, the ring portion 5b is provided inside the lower portion of the pier 12 and the lower roofing material 13 and The annular protrusion 5b1 of the ring portion 5b is located inside the field plate 14. As shown in FIG. 3, the annular protrusion 5b1 of the ring portion 5b is a protrusion having a mountain-shaped cross section in the axial direction, which is provided between the cylindrical flat valley portions 5b4 equally arranged in the axial direction. The inclination angle d of the inclined protrusion surface 5b2 on the tip end side of the annular protrusion 5b1 is formed to be larger than the inclination angle e of the inclined protrusion surface 5b3 on the head side. In this embodiment, the inclination angle d of the inclined ridge surface 5b2 on the tip side is 60 degrees, and the inclination angle e of the inclined ridge surface 5b3 on the head side is 30 degrees. That is, since the inclination angle d of the inclined ridge surface 5b2 on the tip end side of the annular ridge 5b1 is formed to be larger than the inclination angle e of the inclined ridge surface 5b3 on the head side, the ring portion 5b is attached to the underlaying material 13. The inner diameter of the through-hole generated when it is driven inside does not become larger than the outer diameter of the ring portion 5b, and the ring portion 5b closely adheres to the inside of the underlaying material 13 without any gap to maintain good sealing performance. It is possible to prevent rainwater from entering the field board 14 more reliably. The pitch P2 (FIG. 3) of the ring portion 5b is 0.8 mm, which is smaller than the thickness T3 (2 mm) of the lower roofing material 13. Therefore, as shown in FIG. 4( b ), when the ring portion 5 b is penetrated through the inside of the lower roofing material 13, two annular protrusions 5 b 1 and 5 b 1 are arranged inside the lower roofing material 13. The contact area between the ring portion 5b and the lower roofing material 13 is further increased. As a result, the adhesion between the ring portion 5b and the lower roofing material 13, that is, the sealing property can be further improved, so that the infiltration of rainwater into the base plate 14 can be reliably prevented.

  The outer diameter of the ring portion 5b cannot be visually determined from FIG. 1, but the taper angle a is reduced from the head 2 side toward the tip 4 side, that is, the head 2 side, to be exact, The shaft portion is formed in a minute taper shape from the middle 3a in the longitudinal direction toward the tip portion 4 side. The maximum outer diameter D3 (FIG. 1) of the ring portion 5b on the head 2 side is 2.75 mm, the minimum outer diameter D4 of the ring portion 5b on the distal end portion 4 side is 2.64 mm, and the length of the ring portion 5b is The length L2 (FIG. 4) is 26.4 mm. Therefore, the taper angle a of the ring portion 5b is 0.12 degrees.

  Further, in the present embodiment, the screw portion 5a is composed of only the spiral protrusion 5a1, and no annular groove or the like is formed on the spiral protrusion 5a1 as in the conventional invention described in the patent document. .. In the present embodiment, the fastening force of the threaded portion 5a with respect to the splint 12 can be strengthened as compared with the conventional screw nail having the threaded portion in which the annular groove is formed on the spiral protrusion. It is possible to improve the pulling resistance when the nail 1 is pulled out from the pier 12, the underlaying material 13 and the base plate 14.

  The tip portion 4 is a quadrangular pyramid-shaped portion (generally a rectangular tip shape), and as shown in FIG. 4, the screw nail 1 is driven from the upper surface of the roof tile 11 to the pier 12, the lower roofing material 13 and the field board 14. At this time, it is a portion that projects to the lower surface side of the base plate 14. The length L3 of the tip portion 4 is 5.6 mm. As shown in FIG. 1, the tip angle b of the tip portion 4 is 25 degrees, and the tip angle b of the tip portion 4 is made smaller than that of a conventional tip portion (for example, 35 degrees). Therefore, the screw nail 1 can be easily driven into the pier 12, the lower roofing material 13, and the base plate 14.

  Thus, according to the present invention, as suggested by the above-described embodiment, the shaft portion 3 has the screw portion 5a formed on the head portion 2 side and formed of the spiral ridge 5a1. When the screw nail 1 is driven into the lower roofing material 13 and the base plate 14, the screw portion 5a enters while rotating in the interior of the splint 12 in a spiral shape, and a spiral protrusion is formed in the driven portion, so that the screw nail 1 is It is possible to improve the pulling-out resistance by the resistance of the spiral projection of the hammered part when pulling out from the pier 12, the lower roofing material 13 and the base plate 14, and firmly fix the roof tile 11 to the pier 12, the lower roofing member 13 and the base plate 14. be able to. Further, according to the present invention, since the shaft portion 3 has the ring portion 5b formed on the side of the tip portion 4 and formed of the group of the annular protrusions 5b1, the sprue 12, the lower roofing member 13 and the ground plate 14 are screwed and nailed. When 1 is driven in, the ring portion 5b enters the inside of the underlaying material 13 and the base plate 14. Therefore, when the screw nail 1 is pulled out from the splint 12, the underlaying material 13 and the base plate 14, the pulling resistance of the screw nail 1 can be further improved by receiving the resistance of the annular projection 5b1 of the ring portion 5b.

  Further, according to the present invention, the shaft portion 3 includes the screw portion 5a formed on the head 2 side and formed of the spiral protrusion 5a1 and the ring portion 5b formed on the tip end 4 side and formed of a group of annular protrusions 5b1. And the screw portion 5a of the shaft portion 3 is formed to have a length that extends over the inside of the nail hole 11a of the roof tile 11 and the inside of the pier 12. Therefore, the pier 12, the lower roofing material 13, and the base plate are formed. When the screw nail 1 is driven into the screw 14, the screw portion 5a penetrates the inside of the splint 12, and the ring portion 5b penetrates the inside of the underlaying material 13 and the ground plate 14. That is, the threaded portion 5 a penetrates only the inside of the splint 12 and does not penetrate the inside of the lower roofing material 13 and the bottom plate 14. In this case, since the screw portion 5a does not penetrate the inside of the lower roofing material 13 and the bottom plate 14, even if rainwater enters from the gap between the head 2 of the screw nail 1 and the roof tile 11, Although it penetrates into the inside of the pier 12 along the spiral valley portion 5a2 of the screw portion 5a, the ring portion 5b following the screw portion 5a is composed of a large number of annular protrusions 5b1 provided adjacent to each other in the axial direction. Since rainwater is not blocked by the annular ridges 5b1 and does not enter the valleys 5b4 between the annular ridges 5b1, the rainwater does not enter the inside of the lower roofing material 13 and the field board 14. Therefore, it is possible to reliably prevent the rainwater from entering the base plate 14. Furthermore, since the ring portion 5b penetrates the entire inside of the lower roofing material 13, the contact area between the ring portion 5b and the lower roofing material 13 is increased by the increase in the contact area between the ring portion 5b and the lower roofing material 13, that is, the seal. It is possible to improve the sex. Therefore, even if rainwater passes through the valley 5a2 of the screw portion 5a and passes through the inside of the pier 12 to a midway portion thereof, it is possible to reliably prevent the rainwater from entering the field board 14.

  Further, according to the present invention, since the pitch P2 of the ring portion 5b is smaller than the thickness T3 of the lower roof material 13, when the ring portion 5b is penetrated into the lower roof material 13, two or more annular protrusions 5b1 are formed. , 5b1 are arranged inside the lower roofing material 13, so that the contact area between the ring portion 5b and the lower roofing material 13 is further increased. Therefore, it is possible to further improve the adhesion between the ring portion 5b and the lower roofing material 13, that is, the sealing property, so that it is possible to reliably prevent the rainwater from entering the base plate 14.

1 screw nail 2 head 2a just below the back surface of the head 3 shaft part 3a shaft part midway part 4 tip part 5a screw part 5a1 spiral protrusion 5a2 valley 5aG screw part center 5b ring part 5b1 annular protrusion 5b2 on the tip side Inclined ridge surface 5b3 Head side inclined ridge surface 5b4 Valley 11 Roof tile 11a Nail hole 11a1 Nail hole inner wall 11a2 Nail hole inner wall 11a3 Top opening 12 Pier 13 Lower roofing material 14 Field plate a Ring taper angle b Tip Point angle c Thread angle of thread d Angle of slanted ridge surface on tip side e Angle of slanted ridge surface on head side r1 Nail hole inner wall with the largest deviation from the screw center Distance to r2 Larger than r1 D1 Head outer diameter D2 Screw part outer diameter D3 Ring part maximum outer diameter D4 Ring part minimum outer diameter L1 Screw part length L2 Ring part length L3 Tip part Length P Opening P1 Thread pitch P2 Ring pitch T1 Roof tile thickness T2 Timber thickness T3 Floor material thickness T4 Field plate thickness

Claims (4)

A roof nail fixing screw nail for fixing a roof tile to a pier, an underlaying material and a ground plate,
A shaft portion; a head portion having a large diameter formed at one end of the shaft portion; and a tip portion formed in a pointed shape at the other end of the shaft portion,
The shaft portion is formed from a screw projecting from a portion directly below the back surface of the head portion toward the shaft portion midway portion, and is formed from the shaft portion midway portion toward the tip portion side following the screw portion. And a ring portion formed of a group of annular protrusions,
The ring portion is formed so that its pitch is smaller than the thickness of the lower roofing material,
The head portion formed at one end of the shaft portion, in a state where the screw portion of the shaft portion that is inserted into the nail hole of the roof tile is radially displaced in the nail hole and the screw portion is in contact with the nail hole inner wall, In contrast to the virtual circle whose radius is the distance from the center of the screw part to the inner wall of the nail hole with the largest deviation distance, it is formed in a circular head with a radius larger than this,
The thread portion of the shaft portion is formed to have a length that extends inside the nail hole of the roof tile and the inside of the pier, and the ring portion of the shaft portion is formed to have a length that penetrates the field plate from the lower portion inside the pier. Was
In addition, the roof part is a roof tile fixing screw nail in which the outer diameter of the ring part is tapered such that the outer diameter of the ring part is reduced from the middle part of the shaft part toward the tip part side.
The roof nail fixing screw nail according to claim 1 , wherein a pitch of the ring portion is in a range of 0.5 mm or more and 1.9 mm or less. The roof nail fixing screw nail according to claim 1 or 2 , wherein a taper angle of the ring portion is within a range of 0.10 degrees or more and 0.30 degrees or less from a middle portion of the shaft portion to a tip portion. The roof tile according to any one of claims 1 to 5 , wherein an inclination angle of an inclined protrusion surface on a tip end side of the annular protrusion of the ring portion is larger than an inclination angle of an inclined protrusion surface on a head side. Fixing screw nail.

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