JP3941024B2 - Threaded anchor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a threaded anchor used as a base reinforcement for fixing various equipment and the like to a weak wall base such as a plaster board with a screw.
[0002]
[Prior art]
When attaching various equipment to the wall or ceiling surface of a building that uses a weak base material such as plasterboard, the base material is fragile. No need for anchors or plugs.
Among them, Japanese Patent Application No. 8-205992 and various self-drilled threaded anchors having an axial opening hole for screwing a conical drill portion and a mounting screw have been proposed.
[0003]
[Problems to be solved by the invention]
However, when these threaded anchors are to be screwed in with an electric tool fitted with a plus cross bit, the material of the base material to be attached, such as gypsum board, is not uniform. When drilling the gypsum board, the cross bit engaging part of the head surface of the threaded anchor is broken by the tip of the plus cross bit attached to the power tool, and the threaded anchor has sufficient rotational force of the power tool. In some cases, the cross bit engaging portion on the head surface of the threaded anchor is completely scraped off by the tip of the plus cross bit to form a round hole, and the threaded anchor is attached to the gypsum board. On the other hand, it was sometimes impossible to perforate.
Also, if the threaded anchor needs to be removed due to various circumstances after mounting the equipment, the threaded anchor and the mounting screw have the same traveling direction due to rotation when the mounting screw is turned in the loosening direction. For this reason, the threaded anchor rotates together with the mounting screw and comes off from the base, and it may be very difficult to separate the mounting screw from the anchor and the equipment.
Therefore, the problem of the present invention is that the rotational force of the electric tool can be transmitted to the anchor until the fastening is completed without being broken by the tip of the plus cross bit, and it is common to loosen the mounting screw against the wall surface base material. The object is to provide a threaded anchor with an anti-rotation device.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the invention of claim 1 has a head at one end, a sharpened tip or a drill blade-shaped tip at the other end, and a gap between the head and the tip. In a threaded anchor with a male screw on the outer periphery of the hollow shaft, a hexagonal hole is formed from the head side to the tip side of the hollow shaft so that it fits with the hexagon shaft of the hexagon shaft plus bit for an electric screwdriver. The hollow shaft part is formed into a cross hole so as to engage with the cross-shaped end part of the hexagonal shaft plus bit for the electric screwdriver and to be engaged with the mounting screw continuously from the hexagonal hole toward the front end side. A configuration in which at least one nail hole is provided on the end face of the head is adopted. (5-3)
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the threaded anchor 1 has a large-diameter head 2 at one end, a straight hollow shaft portion 3 extending from the neck under the head, and the head side of the hollow shaft portion 3. A conical sharpened portion 4 is provided at the opposite end, and a male screw 5 is provided on the hollow shaft portion 3 from the sharpened portion 4 toward the back surface 6 of the head 2.
Further, as shown in FIG. 2, in the center of the surface of the large-diameter head 2, toward the conical sharpened portion 4 so as to be fitted with the hexagonal shaft portion 12 of the hexagonal shaft plus bit 11 for an electric screwdriver. The hexagonal hole 7 is formed.
Then, as shown in FIGS. 4 and 5, the hexagonal hole 7 for the electric screwdriver is engaged with the cruciform tip 13 of the bit toward the conical sharpened portion 4 continuously to the hexagonal hole 7, and the mounting screw A cross hole 8 is formed so as to mesh with the 18 threaded portions.
Further, a nail hole 14 penetrating from the front surface to the back surface is provided on the end surface of the head 2.
[0006]
The anchor of the present invention is configured as described above. To attach various equipment to a gypsum board or the like, as shown in FIG. 6, the hexagonal shaft portion 12 of the hexagonal shaft bit 11 is inserted into the head side hexagonal hole 7 of the threaded anchor. Are fitted, the cross tip portion 13 of the hexagonal shaft bit 11 is engaged with the cross hole 8, and the sharpened portion 4 of the anchor 1 is rotated while being pressed against the gypsum board 17 to which the wallpaper 16 is applied. The male screw 5 breaks through the wallpaper 16, pierces the gypsum board 17, and causes the hollow shaft 3 to enter the gypsum board 17.
[0007]
At this time, the hexagonal shaft bit 11 is engaged with the threaded anchor 1 by two portions of the engaging portion 10 between the side surface 9 of the head side hexagonal hole 7 and the cross bit of the cross hole 8, and the rotational force is increased by the threaded anchor. I will tell you one.
(5-4)
In addition, after the threaded anchor 1 is fastened to the gypsum board 17, the pin 15 is inserted into the nail hole 14 provided on the end surface of the head 2 so as to penetrate from the front surface to the back surface of the head 2. , The device 19 can be removed while the threaded anchor 1 remains on the gypsum board 17 even if the mounting screw 18 is rotated in the loosening direction.
[0009]
【The invention's effect】
As described above, according to the present invention, the threaded anchor is formed into a hexagonal hole from the head side to the tip side of the hollow shaft part so as to be fitted with the hexagonal shaft part of the hexagonal shaft plus bit for the electric screwdriver. Then, the hollow shaft portion is formed into a cross hole so as to engage with the cross tip portion of the hexagon shaft plus bit for the electric screwdriver continuously from the hexagon hole toward the tip side and to engage with the mounting screw. When the tip of the threaded anchor drills the gypsum board, the plus cross bit fitting part on the head surface of the threaded anchor is broken by the tip of the hexagonal shaft plus cross bit attached to the power tool. And the rotational force of the power tool can be reliably transmitted to the tip of the threaded anchor.
In addition, by driving a pin into a gypsum board through a nail hole provided on the head end face of the threaded anchor, it is possible to prevent the threaded anchor from rotating together even if the mounting screw is rotated in the loosening direction. The equipment can be removed with the gypsum board left behind.
[Brief description of the drawings]
FIG. 1 is a front view of a threaded anchor. FIG. 2 is a top view of a threaded anchor. FIG. 3 is a side view of a threaded anchor. 5] Cross-sectional view taken along the plane B-B 'shown in FIG. 3. [FIG. 6] Threaded anchor and hexagonal cross bit fitting diagram. [FIG. 7] Threaded anchor usage diagram. [Fig. And its cross section 【Explanation of symbols】
(5-5)
DESCRIPTION OF SYMBOLS 1 Threaded anchor 2 Head 3 Hollow shaft part 4 Sharp part 5 Male screw 6 Back surface of head 7 Hexagonal hole 8 Cross hole 9 Side face of hexagonal hole 10 Engagement part with cross bit 11 Hexagonal shaft plus bit 12 for electric screwdriver Hexagon Shaft 13 Cross Tip 14 Nail Hole 15 Pin 16 Wallpaper 17 Gypsum Board 18 Mounting Screw 19 Equipment

Claims (2)

An electric screwdriver in a threaded anchor having a head at one end, a sharp or drill blade-shaped tip at the other end, and a male screw provided on the outer periphery of the hollow shaft portion between the head and the tip The hexagonal shaft plus bit is formed into a hexagonal hole from the head side to the tip side so as to fit with the hexagonal shaft portion of the bit, and the electric motor is continuously directed from the hexagonal hole toward the tip side. A threaded anchor with a hollow shaft formed into a cross hole so that it engages with the cross-shaped tip of the hexagonal shaft plus bit for a driver and engages with a mounting screw. 2. The threaded anchor according to claim 1, wherein at least one nail hole is provided on the end face of the head.

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