JP2007024236A - Wall-mounting screw fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wall-mounting screw fitting easily mounted and firmly fixable to a gypsum board without leaving a large opening after removed. <P>SOLUTION: A hook part 15 is held to screw a screw coil part 13 with a metal bar body bent in spiral shape, into the gypsum board B. When the screw coil part 13 is completely screwed into the gypsum board B, a washer 16 is pressed to the surface of the gypsum board B by a collar part 14. The washer 16 is deformed into flat shape being pressed by the collar part 14 to generate spring force of pushing the gypsum board B. The screw coil part 13 is thereby fixed to apply force to the gypsum board B and prevented from falling from the gypsum board or getting loose. Only a hole approximately equivalent to the diameter of the metal bar body 12 is bored in the gypsum board B, and when removing the wall-mounting screw fitting 11 from the gypsum board B afterwards, only a small hole is left, and a removal mark is not conspicuous. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wall-mounting screw fitting that can be suitably attached to an architectural wall surface of an attached body such as a plaster board.

  In general, the inner wall of a building often has a double wall structure in which a base material made of gypsum board is pasted on a base frame made of wood or the like, and a finishing material such as a cloth is pasted on the surface of the base material.

  In the case where the wall-mounted screw fitting is firmly attached to such a wall, it is necessary to screw the screw portion into a position where the rafter or the like of the base frame assembly is disposed. However, if a small-diameter screw portion is screwed into a gypsum board where there is no rafter or the like and a large load is applied to the screw portion, the gypsum board is brittle and easily collapses, so that the metal fitting may fall off.

  There are several examples of means for attaching the wall-mounted screw fitting to the wall surface of the gypsum board. For example, the attachment method of Patent Document 1 is known. As shown in FIG. 9, first, a through hole 1 is drilled in a gypsum board B with a drill or the like, and then a large-diameter anchor member 2 made of a synthetic resin is formed in the through hole 1 and has a thread groove 2a at the center. The anchor member 2 is fixed to the gypsum board B by screwing. A metal hook 3 having a threaded portion 3 a is screwed into the thread groove 2 a of the anchor member 2.

JP 2004-308443 A

  Although the anchor member 2 has a large diameter in the above-described method, the anchor member 2 can be firmly fixed to the gypsum board B. However, when the anchor member 2 is fixed, it is necessary to make the through hole 1 in the gypsum board B in advance. Further, when the hook 3 is removed and the anchor member 2 is removed, for example, when changing the mounting position of the hook 3, an opening having a diameter larger than the through hole 1 due to the trace of the anchor member 2 in the gypsum board B It becomes difficult to see and it is necessary to repair this opening.

  The object of the present invention is to eliminate the above-mentioned problems, for example, easy to attach to a mounted body such as a plaster board, and capable of being firmly fixed, and a screw for wall hanging that does not leave a large opening even after removal. It is to provide metal fittings.

  In order to achieve the above object, the technical feature of the wall-mounted screw fitting according to the present invention is that it has a screw coil portion that is spirally bent and sharpened at the tip thereof in order to be screwed into a body to be attached. is there.

  According to the wall-mounted screw fitting according to the present invention, the screw coil portion that is spirally bent is fixed to the mounted body with a large surface area. Since only a very small hole through which the rod is inserted, the trace is not noticeable even if it is removed. Also, no special tool is required, and anyone can easily attach or remove it.

  The present invention will be described in detail based on the embodiment shown in FIGS.

  FIG. 1 shows a side view of a wall-hanging screw fitting 11 in this embodiment. A metal rod 12 having a pointed diameter of about 1 to 1.5 mm is spirally bent at a part of the fitting 11. A screw coil portion 13 is formed. This screw coil part 13 is the same as the screw coil part without cork with respect to wine cork. A flange portion 14 and an arcuate hook portion 15 are connected to the base portion of the screw coil portion 13.

  FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG. 1. The metal rod 12 has a cross-sectional shape in which the surface perpendicular to the central axis of the screw coil portion 13 is crushed, and the pulling force and pressing force are shown. The strength against force is improved, which is preferable.

  FIG. 3 is a front view of a washer 16 having a hole 16a inserted through the metal rod 12 at the center and made of a concave plate spring, and is inserted from the tip of the screw coil portion 13 to the position of the flange 14. By moving, the washer 16 is positioned by the flange 14 as shown in FIG.

  In use, the screw coil portion 13 is screwed into a gypsum board B having a hook portion 15 and a cross C attached to the surface as shown in FIG. When the screw coil portion 13 is completely screwed into the gypsum board B, the washer 16 is pressed against the surface of the gypsum board B by the flange portion 14.

  The washer 16 is deformed flat by being pressed by the flange portion 14, a spring force is generated to push the gypsum board B, the screw coil portion 13 is fixed so that a force acts on the gypsum board B, and the gypsum board B Is prevented from falling off or coming loose. Using this spring force, it is possible to adjust the final tightening degree and attach the hook portion 15 upward.

  Accordingly, the gypsum board B only has a hole with a diameter of about 1 to 1.5 mm corresponding to the diameter of the metal rod 12, and even if the wall mounting screw 11 is later removed from the gypsum board B, the diameter 1 The removal mark is not conspicuous just by leaving a hole of about 1.5 mm.

  Further, when screwing the screw coil portion 13, since the tip is inserted obliquely, it is highly possible that the cross C at a position corresponding to the hole remains attached to a part of the hole, and the metal fitting 11 is removed. At this time, if the hole is covered with the remaining material of the cloth C, the hole becomes almost invisible.

  In the first embodiment, the washer 16 is inserted through the screw coil portion 13. However, in the wall-hanging screw fitting 11 'of the second embodiment, the center is thick at the base of the screw coil portion 13 as shown in FIG. The washer 21 is welded.

  As shown in the front view of FIG. 7, a cross groove 22 for driving the driver is formed on the front side of the washer 21. Further, a screw groove 23 for screwing a screw is formed in the center of the washer 21. Yes.

  In using the metal fitting 11 ′, the screw coil portion 13 can be screwed into the gypsum board B by rotating a plus driver in contact with the groove 22 of the washer 21. It is firmly fixed by the spring force of the washer 21.

  After that, by screwing the screw 24 into the screw groove 23 of the washer 21, for example, the attachment 25 can be fixed by the screw 24 as shown in FIG. Alternatively, instead of the screw 24, a conventionally used threaded hook 3 shown in FIG.

It is a side view of the screwing part of Example 1, and a hook part. It is an expanded sectional view of the AA line of the metal bar in FIG. It is a front view of a washer. It is a side view of the screw fitting for wall hangings in the state where the washer was inserted. It is sectional drawing of the state attached to the gypsum board. It is a side view of the screw fitting for wall hangings in Example 2. FIG. It is a front view of a washer. It is sectional drawing of the state attached to the gypsum board. It is use explanatory drawing of the conventional screwing metal fitting for wall hangings.

Explanation of symbols

11, 11 ′ Wall mounting screw 12 Metal rod 13 Screw coil section 14 Hook section 15 Hook section 16, 21 Washer 22 Cross groove 23 Screw groove 24 Screw 25 Attachment B Gypsum board

Claims (6)

  A wall-mounting screw fitting, comprising a screw coil portion having a metal rod for screwing into a body to be attached, spirally bent and sharpened at a tip.   2. The wall-hanging screw fitting according to claim 1, wherein a leaf spring washer is attached to a base portion of the screw coil portion.   The wall mounting screw fitting according to claim 2, wherein a flange is provided at a base of the screw coil portion to fix the washer.   The wall-mounting screw fitting according to claim 3, wherein a hook is continuously provided on the flange portion.   The wall mounting screw fitting according to claim 1, wherein the washer is integrated with a base portion of the screw coil portion, and a cross groove for a driver is provided in the washer. 6. The wall mounting screw fitting according to claim 5, wherein a screw thread groove is formed at the center of the washer, and a screw is screwed into the screw groove.

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