JPH1061633A - Drill screw for interior panel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix an interior panel material to the substrate material of a structure while keeping a specified space. SOLUTION: A drill screw 11 includes a trumpet or disk-shaped head part 13 in one end of a screw shaft part 12 and a drill part 14 in the other end thereof, the drill part 14 is provided in the tip of a thin and long guiding shaft part 15 successively provided in the tip of the screw shaft part 12, and a length L from the tip of the screw shaft part 12 to the tip of the drill part 14 is set longer than the sum of the thickness (a) of an interior panel 5, the space (b) of a gap 7 and the thickness (c) of a substrate material 6. On the other hand, in the screw shaft part 14, a first screw thread 16 engaged with the substrate material 6 and a second screw thread 17 screw engaged with the interior panel 5 are continuously provided at equal pitches and the second screw thread 17 is formed to be larger in diameter than the first screw thread 16, smaller in thread angle and thin and high.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill screw used for fixing an interior panel material (eg, gypsum board) such as a wall or ceiling in a building to a steel base material of a structure, and more particularly to the interior thread. The present invention relates to a drill screw for an interior panel material which is suitable for fixing a panel material to the base material with a certain gap therebetween.

[0002]

2. Description of the Related Art As shown in FIG. 3, a drill screw 1 of this type has a trumpet-shaped or dish-shaped head 3 at one end of a screw shaft portion 2 and a drill portion 4 at the other end. A prepared hole is machined in an interior panel material 5 such as a gypsum board and a steel base material 6 such as a lightweight section steel by a drill portion 4 and screwed while being screwed up by a screw shaft portion 2. Is fixed to the base material 6, but since the surface of the interior panel material 5 is finished with a decorative material such as wallpaper or cloth, the head 3 is flush or slightly depressed with the surface of the interior panel 5. Screw, and the depressed surface of the interior panel 5 is putty-coated to finish it flush. In order to sink the head 3 into the interior panel material 5 as described above, the shape of the head 3 is trumpet-shaped or dish-shaped so as to reduce the press-in resistance.
A large axial force acts on the screw shaft portion 2 screwed to the base material 6.

[0003]

On the other hand, the base material 6 often has a reinforcing plate or the like fixed to the connecting portion thereof.
When the interior panel material 5 is attached via such a reinforcing plate, as shown in FIG. 4, a gap 7 is formed between the interior panel material 5 and the base material 6, and the interior panel member 5 is separated by the gap 7. 5 has to be fixed to the base material 6. However, in the conventional drill screw 1, the drill portion 4 penetrating the interior panel material 5 is strongly pressed against the base material 6 by the screwing action of the screw shaft portion 2 screwed to the panel material 5.
There is a possibility that the drill portion 4 is damaged or the panel member 5 is lifted and broken by the reaction force. Further, by the screwing action of the screw shaft portion 2 screwed to the base material 6, the drill screw 1 and the panel portion 5 </ b> A to which the screw shaft portion 2 is screwed become the base material 6.
There is a problem that the panel portion 5A is broken or dented before the head portion 3 of the drill screw 1 sinks into the panel material 5 because the head portion 3 of the drill screw 1 sinks into the panel material 5.

An object of the present invention is to solve the above-mentioned conventional problems, and in particular, an interior panel material suitable for fixing an interior panel material to a base material of a structure with a certain gap therebetween. It is intended to provide a drill screw for use.

[0005]

According to the present invention, there is provided a drill screw having a trumpet-shaped or dish-shaped head at one end of a screw shaft portion and a drill portion at the other end. In order to fix the interior panel material to the base material of the structure with a certain gap, (i) the drill portion is provided at the tip of an elongated guide shaft connected to the tip of the screw shaft. The length (L) from the tip of the screw shaft portion to the tip of the drill portion is calculated from the sum of the thickness (a) of the interior panel, the gap (b) of the gap, and the thickness (c) of the base material. It is set long. (Ii) On the other hand, a first screw thread to be screwed to the base material and a second screw to be screwed to the interior panel material are provided on the screw shaft portion.
Are formed continuously at the same pitch, and the second thread has a larger diameter, a smaller thread angle, a thinner height, and a larger diameter than the first thread.

It is preferable that the total area of the flank surface on the tightening side of the second screw thread to be screwed to the interior panel material is set larger than the area of the seat surface of the head.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows that the drill screws 11 according to the present invention are prepared in the interior panel material 5 made of gypsum board and the steel base material 6 made of lightweight section steel opposed to each other with a certain gap 7 therebetween. , 19 have been completed. The configuration of the drill screw 11 having a trumpet-shaped or dish-shaped head 13 at one end of the screw shaft portion 12 is the same as a conventional drill screw of this type, but the drill portion 14 is formed of a screw shaft portion 12.
The length (L) from the distal end of the screw shaft portion 12 to the distal end of the drill portion 14 is provided at the distal end of the elongated guide shaft portion 15 connected to the distal end of the interior panel material 5 and The length is set to be longer than the sum of the interval (b) of the gap 7 and the thickness (c) of the base material 6. On the other hand, the screw shaft portion 12 is provided with a first screw thread 16 screwed to the base material 6 and a second screw thread 17 screwed to the interior panel material 5 continuously at the same pitch. . The first thread 16 is formed as a standard thread, and the drill diameter of the drill portion 14 is set slightly larger than the root diameter of the first thread 16. The second
The thread 17 of the first thread 16 has a diameter larger than that of the first thread 16, has a smaller angle, and is formed as a thin, high-profile thread. For this reason, the root diameter of the second thread 17 is smaller than the root diameter of the first thread 16. Further, the total area of the flank face 17a on the tightening side of the second thread 17 is equal to the head 1
3 is larger than the area of the seating surface 13a, and the head 13 is attached to the interior panel material 5 without breaking the interior panel material 5 by the screwing action of the second thread 17 as described later. It can be dragged in.

Drill screw 11 having the above configuration
As shown in FIG. 1, the interior panel material 5 is
The screw shaft portion 12 is not screwed into the interior panel material 5 until the pilot holes 18 and 19 are formed in the base material 6, respectively. In the state where the preparation of the pilot holes 18 and 19 shown in FIG.
And screwed while tapping. Then, the first thread 16 penetrates the interior panel material 5 and the base material 6
And the second screw 17 is screwed into a female screw (not shown) screwed to the interior panel material 5 by the first screw 16 while being screwed into the prepared hole 19. . At this time, the second thread 17 is connected to the first thread 16
Since it is continuous at the same pitch as above, it is accurately and smoothly screwed into the female screw portion. Moreover, the second thread 1
7 has a larger diameter than the first thread 16, a smaller angle, and is formed into a thinner and higher thread, so that the female screw portion is enlarged with only a small screwing resistance, and the interior panel material 5 has a second thread. The screw thread 17 is screwed. Furthermore, since the first thread 16 screwed to the base material 6 is not affected by the axial force (because the pitch is the same), the second thread 17 is formed only by its own screwing action. 5, the interior panel 5 is not broken or dented even if the gap 7 exists. In addition, since the total area of the flank surface 17a on the tightening side of the second thread 17 is set to be larger than the area of the seating surface of the head 13, the axial force by the second thread 17 causes the head 13 to Interior panel material 5
The head 13 can be sunk to a predetermined position of the panel member 5 without breaking the panel member 5 as shown in FIG.

[0010]

As described above, the drill screw according to the present invention is suitable for fixing an interior panel material such as a gypsum board to a base material of a structure with a certain gap therebetween. Thus, there is no inconvenience such as breakage or denting of the interior panel material.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a main part showing a state in which a pre-drilling process has been performed on an interior panel material and a base material with the interior panel material drill screw of the present invention.

FIG. 2 is a vertical sectional front view of a main part showing a state where the interior panel material is fixed to a base material with the same drill screw.

FIG. 3 is a vertical sectional front view of a main part showing a state of attachment of an interior panel material using a conventional drill screw.

FIG. 4 is an explanatory view showing another attachment state of an interior panel material using a conventional drill screw.

[Explanation of symbols]

 5 Interior Panel Material 6 Base Material 7 Void 11 Drill Screw for Interior Panel Material 12 Screw Shaft 13 Head 14 Drill 15 Guide Shaft 16 First Thread 17 Second Thread 18, 19

Claims (2)

[Claims] 1. A drill screw having a trumpet-shaped or dish-shaped head at one end of a screw shaft portion and a drill portion at the other end, wherein the interior panel material is separated from the interior panel material by a predetermined gap. In order to fix to the material, (i) the drill portion is provided at the tip of an elongated guide shaft portion connected to the tip of the screw shaft portion, and has a length from the tip of the screw shaft portion to the tip of the drill portion. The length (L) is set to be longer than the sum of the thickness (a) of the interior panel, the interval (b) of the gap, and the thickness (c) of the base material. (Ii) On the other hand, a first screw thread to be screwed to the base material and a second screw to be screwed to the interior panel material are provided on the screw shaft portion.
Are formed continuously at the same pitch, and the second thread has a larger diameter, a smaller thread angle, a thinner height, and a larger diameter than the first thread. A drill screw for an interior panel material, characterized in that: 2. The second panel screwed to the interior panel material.
The drill screw for an interior panel material according to claim 1, wherein the total area of the flank surface on the tightening side of the screw thread is larger than the area of the seat surface of the head.