JP2019032015A - Self-tapping screw and fixation method using self-tapping screw - Google Patents

Abstract

To provide a self-tapping screw capable of being placed into a ceramic or stone-made material to be fixed, and capable of fixing a fixation member to the material to be fixed, and a fixation method using the self-tapping screw.SOLUTION: A self-tapping screw 1 is configured to be placed into a ceramic or stone-made material to be fixed, and is made of metal whose tensile strength exceeds 720 N/mm2, wherein a cut-in part 8 is formed at a screw thread 5 within a predetermined range from a tip part 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tapping screw driven into a material to be fixed made of ceramic products or stone, and a fixing method for fixing a fixing member to the material to be fixed using the tapping screw.

  Conventionally, it has been difficult to fix tapping screws to ceramic products such as ceramics and stone products. When fixing fixing members such as metal fittings to fixed materials such as ceramic products and stone products, There is known a fixing method in which a pilot hole with an expanded inside is formed, a blind rivet is inserted into the pilot hole, and a mandrel is pulled to widen the portion inserted into the pilot hole and fix it by caulking. (See Patent Document 1).

Japanese Patent Laid-Open No. 10-325404

  By the way, the caulking and fixing by the blind rivet as described above requires time for forming the prepared hole because it is necessary to widen the inside of the prepared hole. In addition, since the blind rivet needs to be deformed so that the portion inserted into the pilot hole is sufficiently widened by pulling out the mandrel, it is difficult to use a hard metal such as stainless steel, and the materials used for the blind rivet are limited. Therefore, the required corrosion resistance and strength cannot be obtained depending on the location used.

  Therefore, the present invention provides a tapping screw that can be driven into a ceramic material or a stone-made fixing material and can fix a fixing member to these fixing materials and a fixing method using the tapping screw. For the purpose.

  The tapping screw of the present invention is a tapping screw for driving into a ceramic product or stone fixed material, and has a tensile strength exceeding 720 N / mm 2 and is cut from a tip portion into a thread in a predetermined range. It is characterized by being formed.

  The tapping screw of the present invention is characterized in that a plurality of the cut portions are formed at equal intervals in the circumferential direction of the screw, and are formed in a thread having a pitch of 3 pitches or more from the tip portion.

  The fixing method of the present invention is a fixing method for fixing a fixing member to a material to be fixed made of ceramic products or stone, and inserts any of the above tapping screws into a through hole formed in the fixing member, The tapping screw is fastened to a pilot hole formed in the fixed material.

  The fixing method of the present invention is characterized in that the material to be fixed is made of porcelain having a forced water absorption rate by boiling or reduced pressure of less than 3.0%.

  In the fixing method of the present invention, the material to be fixed is attached as a decorative material to the surface of the outer wall base material or the inner wall base material, the tapping screw is inserted into a through-hole formed in the fixing member, and the tapping screw is inserted. The fixing member is fixed to the fixed material by fastening to a pilot hole formed in the fixed material, and then a desired fixture is fixed to the fixing member.

  The fixing method of the present invention is a flat decorative material in which the material to be fixed is fixed to the surface of the outer wall base material or the inner wall base material, and a through hole is formed by forming a pilot hole on the back surface of the material to be fixed. The fixed member is placed on the back surface of the material to be fixed so that a part thereof protrudes from the material to be fixed, the tapping screw is inserted into the through hole, and the tapping screw is fastened to the pilot hole. Then, the fixing member is fixed to the fixed material, the fixed material is disposed on the surface of the outer wall base material or the inner wall base material, and the portion of the fixing member that protrudes from the fixed material is A screw is fixed to the outer wall base material or the inner wall base material.

  According to the tapping screw of the present invention, the tensile strength exceeds 720 N / mm2, and the notched portion is formed in the screw thread in the predetermined range from the tip portion, so that the fixing material made of ceramic products or stone material can be used. It can be screwed in by self-tapping just by making a pilot hole.

  According to the tapping screw of the present invention, a plurality of cut portions are formed at equal intervals in the circumferential direction of the screw, and are formed in a screw thread of 3 pitches or more from the tip portion, so that the tapping screw is screwed with a fixed material with a small torque. It is possible to suppress cracking of the fixed material and crushing of the tapping screw.

  According to the fixing method of the present invention, the tapping screw is inserted into the through hole formed in the fixing member, and the tapping screw is fastened to the pilot hole formed in the fixing material. Can be fixed to.

  According to the fixing method of the present invention, since the material to be fixed is made of porcelain having a forced water absorption rate of less than 3.0%, various fixing members can be easily fixed to a hard material to be fixed such as a porcelain tile. it can.

  According to the fixing method of the present invention, a fixing material is affixed to the surface of the outer wall base material or the inner wall base material as a decorative material, a tapping screw is inserted into a through hole formed in the fixing member, and the tapping screw is inserted into the covering target. The fixing member is fixed to the fixed material by fastening to the pilot hole formed in the fixing material, and then the desired fixture is fixed to the fixing member. Therefore, the surface decoration material of the outer wall or the inner wall is, for example, a tile Even when it is a ceramic product or made of stone such as marble, for example, it is possible to easily fix a fixing member such as a hook metal fitting or a receiving metal fitting. Easy to install.

  According to the fixing method of the present invention, the fixing material is a decorative material that is fixed to the surface of the outer wall base material or the inner wall base material, and a fixing member in which a through hole is formed by forming a pilot hole on the back surface of the fixing material. Is placed on the back surface of the material to be fixed so that part of the material protrudes from the material to be fixed, a tapping screw is inserted into the through hole, and the tapping screw is fastened to the pilot hole to fix the fixing member. Because it is fixed to the material, the fixed material is placed on the surface of the outer wall base material or the inner wall base material, and the portion of the fixing member that protrudes from the fixed material is screw-fixed to the outer wall base material or the inner wall base material. The decorative panel can be fixed to the outer wall base material or the inner wall base material.

The perspective view which shows the external appearance structure of a tapping screw. The figure which shows the state which looked at the tapping screw from the front-end | tip part side. The side view of a tapping screw. Sectional drawing which shows the state before screwing the tapping screw inserted in the through-hole of a fixing member into the prepared material's prepared hole in the fixing method of 1st Embodiment. Sectional drawing which shows the state which screwed the tapping screw in the pilot hole and fixed the fixing member to the to-be-fixed material in the fixing method of 1st Embodiment. In the fixing method of 2nd Embodiment, the perspective view which shows the state which has piled up and arrange | positioned the fixing member in which the through-hole was formed on the back surface of a to-be-fixed material so that one part might protrude from a to-be-fixed material. Sectional drawing which shows the state which fixed the fixing member to the to-be-fixed material with the tapping screw. Sectional drawing which shows the state which has arrange | positioned the to-be-fixed material which fixed the fixing member to the back surface on the surface of an outer wall base material or an inner wall base material. Sectional drawing which shows the state which screw-fixed the part which protruded from the to-be-fixed material of the fixing member to the outer wall base material or the inner wall base material. Sectional drawing which shows the state which filled the joint material, such as mortar, between the to-be-fixed materials, hidden the screw and the fixing member so that it might not be visible from the outside, and completed the decoration of the outer wall or the inner wall.

  Hereinafter, the best embodiment of the tapping screw 1 and the fixing method according to the present invention will be described with reference to the drawings. The tapping screw 1 is a screw that can be screwed into the prepared hole 2 in which the female screw is not cut. As shown in FIGS. 1 to 3, the tapping screw 1 has a head portion 3 having an enlarged diameter and a screw portion 4 in which a helical thread 5 is formed. The head 3 has a disk shape in which a plus groove 6 is formed. The shape of the head 3 is not limited to the plus groove 6 and may be any shape as long as the rotational torque can be transmitted from the tool. The screw threads 5 are formed with a pitch of about 1 mm, for example, and an outer diameter of, for example, 4.8 mm. The tip 7 of the tapping screw 1 is formed flat with chamfered corners.

  The tapping screw 1 is provided with four notches 8 at equal intervals in the circumferential direction of the screw on the thread 5 in the range of 4 pitches from the tip 7. The cut portion 8 is formed in a V shape and is cut from the screw thread 5 so as to reach the valley bottom. In addition, the range in which the cut | notch part 8 is formed should just be a predetermined range from the front-end | tip part 7 of a screw, and is not limited to 4 pitches. Further, the number of the cut portions 8 formed is not limited to four places per circumference in the circumferential direction of the screw, but may be three places or less or five places or more.

The material of the tapping screw 1 has a tensile strength exceeding 720 N / mm ² at room temperature, preferably 750 N / mm ² or more. The material of the tapping screw 1 is preferably stainless steel having high strength and excellent corrosion resistance. For example, NSSC (registered trademark) 270R manufactured by Nippon Steel & Sumikin Stainless Steel Co., Ltd. can be used.

  A first embodiment of a fixing method for fixing the fixing member 10 to the fixed material 9 using the tapping screw 1 as described above will be described. The fixed material 9 is, for example, a decorative material attached to the surface of an outer wall base material or an inner wall base material (not shown). The material 9 to be fixed is made of ceramic products or stone. Ceramic products are decorative materials for buildings and interiors and exteriors obtained by high heat treatment of non-metallic materials such as clay, silica sand, and limestone. Examples of ceramic products include ceramics, porcelain, roof tiles, and glass. Stone is also used as a decorative material for buildings and interiors and exteriors. The stone material includes, for example, granite, andesite, tuff, serpentine, marble, and the like. The material 9 to be fixed in this embodiment is particularly preferably a porcelain tile having a forced water absorption rate of 3.0% or less in a test by boiling method or vacuum method in JIS A 1509-3.

  The outer wall base material and the inner wall base material are, for example, concrete walls, steel or wooden wall base materials. A fixed material 9 as a decorative material is attached to the surface of these wall base materials. The fixed material 9 and the wall base material may be fixed by, for example, an adhesive, or may be integrated by placing the fixed material 9 on a mold in advance and placing concrete.

  The fixing member 10 is a hook metal fitting in the present embodiment. Even if the surface of the inner and outer walls is made of porcelain by fixing such a fixing member 10 to a fixed material 9 as a decoration material on the surface of the inner and outer walls, for example, a frame of a decorative article, etc. Articles to be hung on the wall can be hung. The fixing member 10 is not limited to the hook metal fitting, and may be various attachment metal fittings that can fix an article to be attached to the wall surface.

  As a fixing method, first, although not shown, the fixed material 9 is attached to the surface of the outer wall base material or the inner wall base material. And the pilot hole 2 is formed in the said to-be-fixed material 9 with the drill which is not shown in figure. The pilot hole 2 is dug into a circular shape that is smaller than the outer diameter of the tapping screw 1 and larger than the valley diameter of the tapping screw 1. Then, as shown in FIG. 4, the tapping screw 1 is inserted into the through hole 12 provided in the fixing member 10, and then, as shown in FIG. 5, the tapping screw 1 is a pilot hole formed in the fixed material 9. Fasten to 2. Since the tapping screw 1 has a tensile strength exceeding 720 N / mm 2 and a cut portion 8 is formed in the screw thread 5 in a predetermined range from the tip end portion 7, the decorative material made of ceramics or stone is used. It can fix also to the to-be-fixed material 9 made from such a hard material.

  In addition, the to-be-fixed material 9 is not limited to the decoration material of the above-mentioned inner and outer walls. The fixed material 9 may be, for example, a furniture top plate such as a ceramic product table or a stone table, and the fixing method of the present embodiment may be, for example, a method of fixing legs to the table top plate. good. Further, the material 9 to be fixed may be furniture or upholstery itself.

  Next, a second embodiment of a fixing method for fixing the fixing member 10 to the fixed material 9 using the tapping screw 1 will be described. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The to-be-fixed material 9 is a decoration material affixed on the surface of the outer wall base material 11 or the inner wall base material 11, for example. The material 9 to be fixed is made of ceramic products or stone. In particular, the material 9 to be fixed is preferably a porcelain tile having a water absorption rate of less than 3.0%. The outer wall base material 11 and the inner wall base material 11 are, for example, a concrete wall, a steel or wooden wall base material.

  The fixing member 10 is a flat fixing plate for fixing the material 9 to be fixed, which is a decorative panel, to the inner wall base material 11 or the outer wall base material 11. A through hole 12 for inserting the tapping screw 1 and a screw hole 13 for fixing to the inner wall base material 11 or the outer wall base material 11 are formed in the fixing member 10.

  In the fixing method of this embodiment, first, the pilot hole 2 is formed on the back surface of the material 9 to be fixed. Then, as shown in FIG. 6, the fixing member 10 in which the through hole 12 is formed is arranged so as to overlap the back surface of the decorative panel so that a part thereof protrudes from the fixed material 9. At this time, the material 9 to be fixed is arranged at a position where the through hole 12 of the fixing member 10 and the pilot hole 2 formed on the back surface of the material 9 to be fixed overlap.

  Then, as shown in FIG. 7, the fixing member 10 is fixed by inserting the tapping screw 1 into the through hole 12 of the fixing member 10 and fastening the tapping screw 1 to the pilot hole 2 of the fixing material 9. Fix to material 9. Then, the adhesive 15 is applied to the back surface of the material 9 to be fixed, and the material 9 to be fixed is disposed on the outer wall base material 11 or the surface of the inner wall base material 11 as shown in FIG. Further, the portion of the fixing member 10 that protrudes from the fixed material 9 is fixed to the outer wall / inner wall base material 11 with screws 14. By fixing with the screws 14 in this way, it is possible to suppress peeling due to poor construction or deterioration as compared with the case of fixing only with an adhesive. Then, the material to be fixed 9 is fixed to the outer wall / inner wall base material 11 so as to be adjacent to each other in the vertical and horizontal directions with a joint interval therebetween. Thereafter, the joint material 16 such as mortar is filled in the joints between the members 9 to be fixed, and the screws 14 and the fixing member 10 are hidden from view from the outside to complete the decoration of the outer wall or the inner wall.

  As described above, according to the fixing method of the present embodiment, the fixed material 9 as the decorative panel can be fixed to the outer wall / inner wall base material 11 easily and reliably.

  Needless to say, the embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the idea of the present invention.

  The tapping screw 1 and the fixing method according to the present invention can be suitably used as a tapping screw 1 and a fixing method for fixing a fixing member 10 to a material 9 to be fixed, for example, ceramic products such as porcelain tiles or stone.

DESCRIPTION OF SYMBOLS 1 Tapping screw 2 Pilot hole 5 Screw thread 7 Tip part 8 Cut part 9 Fixing material 10 Fixing member 11 Base material 12 Through-hole 14 Screw

Claims (6)

It is a tapping screw that is screwed into a ceramic product or stone fixed material,
It is made of metal with a tensile strength exceeding 720 N / mm ² ,
A tapping screw, wherein a notch is formed in a predetermined range of thread from the tip. A plurality of the cut portions are formed at equal intervals in the circumferential direction of the screw,
2. The tapping screw according to claim 1, wherein the tapping screw is formed in a screw thread having a pitch of 3 pitches or more from the tip portion. It is a fixing method for fixing a fixing member to a material to be fixed made of ceramic products or stone,
Inserting the tapping screw according to claim 1 or 2 into a through-hole formed in the fixing member,
A fixing method comprising fastening the tapping screw to a prepared hole formed in the material to be fixed.   The fixing method according to claim 3, wherein the material to be fixed is made of porcelain having a forced water absorption rate by boiling or reduced pressure of less than 3.0%. Paste the fixed material as a decorative material on the surface of the outer wall base material or the inner wall base material,
The fixing member is fixed to the material to be fixed by inserting the tapping screw into the through hole formed in the fixing member and fastening the tapping screw to the pilot hole formed in the material to be fixed. Then, a desired article is fixed to the fixing member, and then the fixing method according to claim 3 or 4. The fixed material is a flat decorative material fixed to the surface of the outer wall base material or the inner wall base material,
Forming the pilot hole on the back surface of the material to be fixed;
Arranging the fixing member formed with the through-hole on the back surface of the material to be fixed so that a part thereof protrudes from the material to be fixed,
Inserting the tapping screw into the through hole, fastening the tapping screw to the pilot hole, and fixing the fixing member to the material to be fixed;
The fixed material is disposed on a surface of the outer wall base material or the inner wall base material, and a portion of the fixing member protruding from the fixed material is screw-fixed to the outer wall base material or the inner wall base material. The fixing method according to claim 3 or 4.

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