JP2015194202A - Board anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board anchor that can be positively fixed to a gypsum board or the like of which blades can be positively expanded without any relation with a thickness of the gypsum board even if the gypsum board or the like to be piled is thick, i.e. its thickness exceeds 12.5 mm or the thickness of the gypsum board or the like is made different.SOLUTION: Two arrowhead-like blades 1 are overlapped to each other, a head part 2 is arranged at their upper ends, and a helical segment 3 for use in fixing a fastening screw Sc is installed at the blades 1, each of the blades 1 is overlapped to form a helical hole 4 into which the fastening screw Sc is screwed and vertical rows of a plurality of protruding pieces 5 engaged with the screw grooves of the fastening screw Sc are arranged below the helical segment 3 at the blades 1.

Description

  The present invention relates to a board anchor that can securely fix a hanger hook, a bracket, a distribution board, a lighting fixture, or the like to a fragile wall surface made of gypsum board or the like.

  Conventionally, as this type of board anchor, for example, as shown in FIGS. 11 and 12, two arrowhead-like blades 11 formed by piercing from a thin metal plate are bent at a small connecting portion 11a at the center, and two anchors are used. It is assumed that the blades 11 are formed with the front half portion 12a and the rear half portion 12b of the spiral portion 12 for screwing a fastening screw Sc such as a lag screw during press molding. When the blades 11 are overlapped, the spiral hole 13 into which the fastening screw Sc is screwed is formed. Furthermore, projecting pieces 14a and 14b that engage with the thread grooves of the fastening screws Sc are provided below the front half 12a and the rear half 12b of the spiral portion 12 (Patent Document 1).

  In order to use such a conventional board anchor, as shown in FIG. 13, the desired position of the gypsum board Bo is desired, and the hitting surface of the head portion 15 is hit with a hammer or the like. Make the side close to the board surface. Then, the fastening screw Sc is passed through the through hole h of the bracket Br to be attached to the gypsum board Bo, and the screw thread is engaged with the spiral hole 13. When the fastening screw Sc is further screwed, the screw foot interrupts the double blade 11 and the projecting pieces 14a and 14b engage with the thread groove of the fastening screw Sc, and as shown in FIG. 14, it penetrates from the gypsum board Bo. The blades 11 and 11 are opened. If the blades 11 and 11 are opened, the anchor is fixed without coming off the gypsum board Bo. If the target plate Pr or the like is fixed to the bracket Br with the bolts and nuts 15, the target object can be fixed to the gypsum board without loosening.

  Furthermore, as this type of conventional board anchor, for example, as shown in FIGS. 15 and 16, a sheet metal blank is formed and bent to provide a center hole 21a for receiving a screw so that it can be screwed. The head 21 and the flat plate-like blades 22 and 23 juxtaposed with the central hole 21a extending from the head 21 and ending in a triangular portion with a sharp tip so as to penetrate the wall W are provided. It is supposed to be formed. The blades 22 and 23 are provided with projecting pieces 24 and 25 at positions shifted from the intermediate portions, respectively (Patent Document 2).

  As shown in FIG. 17, the conventional board anchor thus constructed is driven into the wall W and its head 21 is pressed against the outer surface of the wall W. Then, as shown in FIG. 18, when the mounting tool 26 having a mounting hole is supported in contact with the outer surface of the hollow wall W to which the anchor is attached, the fastening screw Sc is used for mounting the mounting tool 26. Is inserted into the center hole 21a of the head 21 of the anchor pressed against the outer surface of the wall W. When the fastening screw Sc accommodated in the center hole 21a of the head 21 so as to be screwed is rotated, the fastening screw Sc advances between the blades 22 and 23 and separates them. Therefore, the protruding pieces 24 and 25 on the blades 22 and 23 mesh with the thread groove of the fastening screw Sc. As a result, the blades 22 and 23 form a mechanical truss structure in combination with the fastening screw Sc.

Design Registration No. 1390613 Japanese Patent Laid-Open No. 9-25915

  In the above conventional board anchor, if the plaster board to be driven is thin, that is, if the thickness is 12.5 mm or less, the protruding piece of the blade meshes with the thread groove of the screwed fastening screw, and the blade is The blade can be expanded, and the blade projects out of a gypsum board or the like so that it can be firmly fixed.

  By the way, as a JIS standard product of gypsum board, ordinary hard gypsum board generally has thicknesses of 9.5 mm, 12.5 mm, 15.0 mm, etc., and reinforced gypsum board. Are generally 12.5 mm, 15.0 mm, 16.0 mm, 18.0 mm, 21.0 mm, 25.0 mm, etc., and gypsum boards generally have a thickness of 12.5 mm, 15 0.0 mm is often used. In recent years, there has been an increase in the construction of bonding two gypsum boards for the purpose of improving soundproofing.

  Therefore, when one piece of the normal hard plaster board is used as a wall surface or when one piece of the reinforced gypsum board having a thickness of 12.5 mm or less is used as a wall surface or the like, The projecting piece meshes with the thread groove of the screwed fastening screw to expand the blade, and this blade projects out of the gypsum board, so that the board anchor is firmly fixed to the gypsum board. no problem.

  However, when two ordinary hard plasterboards are used as wall surfaces, etc., or when one reinforced plasterboard with a thickness exceeding 12.5 mm is used as wall surfaces, etc., or reinforced plasterboards If two blades are used as a wall, etc., even if the protruding piece of the blade meshes with the screw groove of the screwed fastening screw, the blade will not expand due to the pressure of the gypsum board. -It had a problem that it could not be firmly fixed to the door.

  Furthermore, the thickness of the plasterboard that can be used is only 9.5 mm and 12.5 mm, and cannot be used for thicknesses of 15.0 mm or more. It is necessary to use different anchors according to the thickness of the gypsum board, bring several types of anchors and several types of screws corresponding to the anchors to the work site, and determine the anchor to be used according to the thickness of the gypsum board. It was necessary to construct according to the anchor.

  Therefore, the present invention aims to solve the problems of the above-mentioned conventional board anchor, and when the plaster board to be driven is thick, that is, when the thickness exceeds 12.5 mm, the plaster board, etc. The purpose of the present invention is to provide a board anchor that can be surely fixed to a gypsum board, etc., even if the thickness of the gypsum board is different.

  For this reason, the board anchor of the present invention has two arrowhead-shaped blades 1 stacked on top of each other, a head 2 provided on the upper end thereof, and a spiral portion 3 for screwing a fastening screw Sc. Are provided in the blade 1, and a spiral hole 4 into which the fastening screw Sc is screwed is formed by overlapping each blade 1 in two, and below the spiral portion 3 in the blade 1, respectively. It is assumed that a plurality of protruding pieces 5 that mesh with the thread grooves of the fastening screw Sc are provided in tandem.

  In the board anchor of the present invention, the spiral portion 3 is provided with an appropriate interval i so that two or more threads of the fastening screw Sc can be skipped and screwed.

  Furthermore, the board anchor of the present invention is such that the starting point of the spiral portion 3 is provided with a space s into which three or more threads of the fastening screw Sc enter from the upper end of the blade 1.

  In the board anchor of the present invention, the protruding piece 5 protrudes larger as the protruding piece 5 is provided below the spiral portion 3.

  The board anchor of the present invention is configured as described above. If the plaster board to be driven is thin, that is, if its thickness is 12.5 mm or less, it is the same as the conventional board anchor. The first projecting piece 5 of each blade 1 meshes with the thread groove of the screwed fastening screw Sc, so that each blade 1 can be reliably expanded and firmly fixed to a gypsum board or the like.

  In the board anchor of the present invention, even when the gypsum board or the like is thick, that is, when the thickness exceeds 15.0 mm, the plurality of vertical protruding pieces 5 of each blade 1 are screwed. Since the blades 1 are surely expanded by meshing with the thread grooves of the fastening screws Sc, they can be firmly fixed to the gypsum board or the like.

  Furthermore, in the board anchor of the present invention, when the spiral portion 3 is provided with an appropriate interval i so that two or more threads of the fastening screw Sc can be screwed and screwed in, the fastening to each blade 1 is performed. The meshing of the screw grooves of the screws Sc is reduced, so that a strong torque is not applied to each blade 1, and the plaster board or the like is not damaged or damaged due to the fastening screw Sc of each blade 1 being screwed.

  In the board anchor of the present invention, when the starting point of the spiral portion 3 is provided with a space s in which three or more threads of the fastening screw Sc enter from the upper end of the blade 1, The fastening screw Sc can be screwed straight up and can be screwed in without being obliquely screwed.

  Further, in the board anchor of the present invention, when the protruding piece 5 protrudes larger as it is provided below the spiral portion 3, the blades 1 are more effectively expanded more reliably. The anchor can be firmly fixed to a gypsum board or the like.

It is a perspective view of the state seen from the front side of the anchor for boards of this invention. It is a perspective view of the state seen from the back side of the anchor for boards of this invention. It is a front view of the anchor for boards of this invention. It is a side view of the anchor for boards of this invention. It is a top view of the anchor for boards of this invention. It is a bottom view of the anchor for boards of this invention. It is a perspective view of the state which screwed the fastening screw in the board anchor of this invention, and expanded each blade. It is sectional drawing of the state in which the board anchor of this invention was driven into the 25.0 mm gypsum board. It is sectional drawing of the state which screwed the fastening screw into the board anchor of this invention shown in FIG. 8, and expanded each braid | blade. It is sectional drawing of the state which the anchor for boards of this invention was driven in the gypsum board of 30.0 mm, and also the fastening screw was screwed in and each blade was expanded. It is a front view of an example of the conventional board anchor. It is a side view of the conventional board anchor shown in FIG. It is sectional drawing of the state in which the conventional board anchor shown in FIG. 11 was driven into the gypsum board. It is sectional drawing of the state which screwed the fastening screw in the conventional board anchor shown in FIG. 13, and expanded each braid | blade. It is a perspective view of the other example of the conventional board anchor. It is a side view of the conventional board anchor shown in FIG. It is sectional drawing of the state by which the conventional board anchor shown in FIG. 15 was driven into the gypsum board. It is sectional drawing of the state which screwed the fastening screw in the board anchor of this invention shown in FIG. 17, and expanded each braid | blade.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the anchor for boards of this invention is demonstrated in detail based on drawing.

  In the board anchor of the present invention, an arrowhead-shaped blade 1 formed by punching a metal plate and connecting two is bent at a central connecting portion 1a, and a locking portion 1b at one end is bent. It is assumed that the two are overlapped by locking to the end, and at the time of press molding, the upper end of each blade 1 is bent outward, and the head 2 is formed at the upper end, The first half 3a and the second half 3b of the spiral portion 3 for screwing a fastening screw Sc such as a lag screw are formed on the blade 1 and provided. In the illustrated example, two connecting portions 1a and one locking portion 1b are provided in the vertical direction. However, three connecting portions 1a and one engaging portion 1b are provided according to the length of the blade 1. It may be provided one by one.

  The board anchor of the present invention is formed with a spiral hole 4 into which the fastening screw Sc is screwed when the blades 1 are doubled. Further, a plurality of projecting pieces 5 that are respectively engaged with the thread grooves of the fastening screws Sc are provided in tandem below the spiral portion 3 of each blade 1.

  The blade 1 is used for a wall made of a thick gypsum board Bo (thickness exceeds 15.0 mm), a wall made of a very thick gypsum board Bo (thickness is about 30.0 mm), and the like. It is preferable that the length is about 40 to 60 mm and the width is about 7 to 15 mm because it is easy to drive into the wall. The spiral portion 3 is provided up to about half the length of the blade 1, and the lower end of the blade 1 has a pointed triangular shape.

  The head 2 has the same shape as the head of the fastening screw Sc or a slightly larger shape. When the head 2 contacts the head of the screwed fastening screw Sc, the head of the fastening screw Sc is formed. It does not stick out from the club, or it does not stick out too much.

  The spiral portion 3 is provided at an appropriate interval i so that two or more threads of the fastening screw Sc can be skipped and screwed. In this way, the engagement of the screw groove of the fastening screw Sc with the spiral portion 3 of each blade 1 is reduced, and no strong torque is applied to each blade 1, and gypsum is formed by screwing the fastening screw Sc of each blade 1. The board will not be damaged or damaged.

  Furthermore, the spiral portion 3 is provided with a space s in which three or more threads of the fastening screw Sc enter from the upper end of the blade 1 at the starting point. In this way, the lower end of the fastening screw Sc is inserted into the spiral hole 4 with a margin, and the fastening screw Sc can be easily screwed straight into the spiral hole 4 and is screwed diagonally. There will be no.

  In the illustrated example, the protruding piece 5 is formed by punching the blade 1 and is provided integrally with the blade 1, but is provided by welding another metal plate to the blade 1. It may be a thing.

  Further, in the illustrated example, two protruding pieces 5 are provided in tandem. However, three or more protruding pieces 5 may be provided in tandem as necessary. Further, the protruding piece 5 can be made to protrude more greatly as it is provided below the spiral portion 3. If it does in this way, since each blade 1 will expand more reliably more reliably, the anchor for boards can be firmly fixed to a gypsum board etc.

  By using the board anchor of the present invention configured as described above as follows, a fixed object such as a hanger hook can be firmly fixed to a fragile wall surface made of gypsum board. .

  First, the board anchor of the present invention is desired at a predetermined position such as a brittle wall surface made of gypsum board Bo, and the top surface of the head 2 is struck by a hammer or the like and driven into the head, as shown in FIG. The lower surface of 2 is brought into contact with the gypsum board Bo.

  Next, the fastening screw Sc is passed through the through-hole of a fixed object W such as a hanger hook to be attached to the wall surface, the lower end of the fastening screw Sc is inserted into the spiral hole 4, and the fastening screw Sc is set straight in the spiral hole 4. The screw thread of the fastening screw Sc is engaged with the spiral portion 3.

  When the fastening screw Sc is screwed into the spiral portion 3, the screw foot of the fastening screw Sc interrupts the double blade 1, and the first of the two protruding pieces 5 is inserted into the thread groove of the fastening screw Sc. In the case of a thin gypsum board Bo, the blades 1 penetrating from the gypsum board Bo are expanded, and in the case of a thick gypsum board Bo, as shown in FIG. Then, the portion buried in the gypsum board Bo and each blade 1 penetrating from the gypsum board Bo are expanded. If each of the blades 1 is expanded in this manner, each blade 1 can be firmly fixed to the gypsum board Bo, so that the fixed object W can also be firmly fixed to the gypsum board Bo.

  In the case of a very thick gypsum board Bo, such as when the two gypsum boards Bo are stacked, the tip of each blade 1 cannot be expanded due to the pressure of the gypsum board Bo. As shown in FIG. 10, the rear projecting piece 5 of the two projecting pieces 5 is engaged with the thread groove of the tip portion of the fastening screw Sc so that each blade 1 can be surely expanded, so that the plaster board Bo is secured. Therefore, the fixed object W can be firmly fixed to the gypsum board Bo.

  Further, in the board anchor according to the present invention, when the protruding piece 5 is provided in a state where three or more of the protruding pieces 5 are arranged in series on the blade 1 or the protruding piece 5 is provided below the spiral portion 3, the protruding piece 5 is larger. In the case of a wall made of a very thick gypsum board Bo as described above, each blade 1 to be closed more effectively can be maintained in an expanded state.

  Therefore, the board anchor of the present invention has a case where the wall surface of the gypsum board where the fixed object such as the hanger hook cannot be firmly fixed in the conventional product is thick, that is, the thickness exceeds 12.5 mm. In addition, even if the thickness of the gypsum board or the like is different, a fixed object such as a hanger hook can be firmly fixed to the wall surface of the gypsum board or the like regardless of the thickness of the gypsum board.

DESCRIPTION OF SYMBOLS 1 Blade 2 Head 3 Spiral part 4 Spiral hole 5 Projection piece Sc Fastening screw i Space | interval s Space

Claims (4)

  It is assumed that two arrowhead-shaped blades (1) are overlapped, a head (2) is provided at the upper end, and a spiral portion (3) for screwing a fastening screw (Sc) is provided. The blade (1) is provided, and the blade (1) is overlapped to form a spiral hole (4) into which the fastening screw (Sc) is screwed, and the spiral in the blade (1) is formed. A board anchor characterized in that a plurality of projecting pieces (5) each engaging with a thread groove of a fastening screw (Sc) are provided in a row below the portion (3).   2. The board anchor according to claim 1, wherein the spiral portion (3) is provided at an appropriate interval (i) so that two or more threads of the fastening screw (Sc) can be skipped and screwed. .   The start point of the spiral portion (3) is provided with a space (s) into which three or more threads of the fastening screw (Sc) enter from the upper end of the blade (1). Anchor for board. The board anchor according to claim 1, wherein the protruding piece (5) protrudes more greatly as it is provided below the spiral portion (3).

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