JPH0960627A - Execution of fixing gypsum board to thin steel plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently fix a gypsum board to a thin steel plate with drilling screws by means of an impact type pneumatic-drive thread fastening machine. SOLUTION: A drilling screw is driven into a gypsum board 2 by means of the driver of an impact type pneumatic-drive thread fastening machine for its taper bit part 16 to bore a hole on a C-shaped steel plate structure 1, and then, a small diameter threaded part 15 pierces the structure 1 to step. The drilling screw 11 is rotated by the screw driver to generate a driving force on the screw 11 caused by the minute ridge of the small diameter parallel threaded part 15, and the hole is enlarged and tapped by the taper threaded part 14. The parallel threaded part 15 pierces the structure 1, and a trumpet head 12 penetrates the gypsum board 2 with increase of driving resistance to stop its rotation when its height becomes roughly equal to the surface of the gypsum board 2. Thus, deformation and vibration of the thin steel plate is reduced to improve work efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for fixing a gypsum board to a thin steel plate by using a drilling screw, and in particular, a drilling screw can be driven and screwed by an impact type air driven screw tightener. This relates to a construction method for fixing the gypsum board to the thin steel plate.

[0002]

2. Description of the Related Art An impact type air driven screw tightener in which a screw is driven to some extent by a driver and then rotated and fastened can greatly improve the efficiency of screw tightening work as compared with a power driver which only rotates. .

However, when the gypsum board is fixed to a C-shaped steel plate structural material formed by forming a steel plate having a thickness of 0.5 mm or 0.8 mm, which is generally called light sky, the steel plate is struck by an impact type air-driven screw tightener. When the drilling screw is fastened, there is a problem that the screw fastened first is loosened by the impact at the time of driving the next screw or sinks into the gypsum board. In particular, as shown in FIG. 4, when two gypsum boards 2 and 3 are abutted on the C-shaped steel plate structural material 1 and the screws 4 and 5 are fastened to the respective gypsum boards 2 and 3, the C-shaped steel plate is used. Since the plate thickness of the structural material 1 is thin, as shown in the same figure, the C-shaped steel plate structural material 1 is deformed or vibrated by the impact at the time of driving, and the screw 4 previously fastened is sunk into the gypsum board 2. The coated paper 6 of the gypsum board 2 is broken to lower the load bearing capacity, or as shown in FIG. 5, the screw thread 7 at the connecting portion between the screw 4 and the C-shaped steel plate structural material 1 which has been fastened is deformed or It will be damaged, the fastening force will be reduced, and the screw 4 will loosen. Therefore, the impact type air driven screw tightening machine is not used for the work of fixing the gypsum board to the C-shaped steel plate structural material, but the power driver of only the rotating operation is used.

[0004]

It has been conventionally desired to improve the efficiency of screwing work when fixing a gypsum board to a metal plate such as a C-shaped steel plate structural material. Therefore, it is possible to eliminate the decrease in load bearing force and fastening force caused by the deformation of the steel plate when the screw is driven into the gypsum board and the C-shaped steel plate structural material, and to efficiently perform the screwing work by the impact type air driven screw tightener. Therefore, there is a technical problem to be solved, and an object of the present invention is to solve the above problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above object, and a small-diameter parallel thread portion is continuously formed from a parallel thread portion having a trumpet head at one end through a taper screw portion. Gypsum using a drilling screw formed by forming a taper bit portion at the tip of the small-diameter parallel thread portion and reducing the height of the thread connecting the parallel-thread portion to the small-diameter thread portion at the small-diameter parallel thread portion. When fixing a board to a thin steel plate, the drilling screw is loaded into an impact type air driven screw tightening machine, and the drilling screw is driven into the gypsum board by a driver of the impact type air driven screw tightening machine, and a taper bit of the drilling screw. Part penetrates the gypsum board to reach the thin steel plate, and further, the small-diameter parallel screw part penetrates the thin steel plate and stops, and then the driver drives it. Rotate the ring screw, apply a driving force in the penetration direction by the thread of the drilling screw at the small diameter parallel screw part fitted to the thin steel plate, expand the hole at the taper screw part and tap, , The parallel screw portion penetrates the thin steel plate, the trumpet head enters the gypsum board, and when the height of the trumpet head matches the surface of the gypsum board, the rotation of the driver is stopped and the gypsum board is thin steel plate. It provides a construction method for fixing to.

The gypsum board is laminated on a thin steel plate, and
When the drilling screw is driven in from the upper surface of the gypsum board with an impact type air driven screw tightening machine, the trumpet head of the drilling screw is hit with a driver of the impact type air driven screw tightening machine. Enter. At this time, the tip portion of the drilling screw penetrates the gypsum board, and further penetrates into the thin steel plate, but the sharp taper bit portion of the tip end of the drilling screw has a low penetration resistance into the thin steel plate. Since the small-diameter parallel threaded portion which penetrates into the thin steel plate and stops thereafter is formed in parallel and has a small diameter, when the small-diameter parallel threaded portion penetrates into the thin steel sheet, Deformation and vibration are reduced.

When the small-diameter parallel threaded portion is stopped to penetrate the thin steel plate and then the drilling screw is rotated by a driver of the impact type air-driven screw tightener to be screwed in, the small-diameter parallel threaded portion is used. The minute screw threads generate a propulsive force in the penetrating direction, and the taper screw portion further enlarges the hole formed by the small-diameter parallel screw portion to perform tapping. Then, when the parallel threaded portion penetrates the thin steel plate and is fastened to the thin steel plate, the drilling screw is allowed to rotate without applying a strong pressure in the penetration direction to the impact type air driven screw tightener. Without pushing, and without breaking the tapping holes in the gypsum board.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the drilling screw 11 has a trumpet head 12, and the lower part of the parallel thread portion 13 having the trumpet head 12 having a cross hole or a hexagonal hole is a small diameter parallel thread portion via a taper thread portion 14. 15
In succession. A conical taper bit part 16 is formed at the tip of the small-diameter parallel screw part 15, and the taper angle of the taper bit part 16 is as narrow as 20 degrees, and it is formed into a sharp shape to reduce the penetration resistance to the thin steel plate. I am letting you.

The drilling screw 11 shown in the figure has a total length of 25 mm, the trumpet head 12 has an outer diameter of 8 mm, the parallel screw portion 13 has an outer diameter of 3.55 mm, and the small diameter parallel screw portion 15 has an outer diameter of 1.8 mm.

The double thread 17 extending from the parallel screw portion 13 to the small diameter parallel screw portion 15 via the taper screw portion 14 is connected to the parallel screw portion 13 and the small diameter parallel screw portion 15 at a taper angle of 30 degrees in the taper screw portion 14. are doing. And
In the small diameter parallel thread 15, the height is reduced to 0.1 mm
It is formed to be extremely low in degree, and is formed so as to generate a propulsive force at the time of rotation after driving while suppressing the penetration resistance to the thin steel plate as much as possible.

This drilling screw 11 is loaded into an impact type air driven screw tightening machine, and a thickness of 9.
When screwing 5mm or 12.5mm gypsum board,
As shown in FIG. 2, the drilling screw 11 is driven into the gypsum board 2 by the driver of the impact type air driven screw tightener (not shown), and the taper bit portion 16 pierces the C-shaped steel plate structural material 1. The small-diameter parallel screw portion 15 penetrates the C-shaped steel plate structural material 1 and stops.

Then, the drilling screw 11 is rotated by the driver, and a propulsive force in the penetrating direction is generated in the drilling screw 11 by the small thread of the small-diameter parallel threaded portion 15 fitted to the C-shaped steel plate structural material 1. , Tapping while enlarging the hole by the taper screw portion 14.

Then, the parallel screw portion 13 penetrates the C-shaped steel plate structural material 1 and the trumpet head 12 enters the gypsum board 1 to increase the propulsion resistance, and as shown in FIG.
The height of the trumpet head 12 becomes substantially the same as the surface of the gypsum board 2, and the rotation is stopped.

[0014]

EXAMPLE An experiment in which two gypsum boards are abutted on a C-shaped steel plate structural material 1 and the drilling screws 11 are fastened to the respective gypsum boards under the same conditions as those shown in FIGS. The results obtained are shown in Table 1.

[0015]

[Table 1]

Since the taper screw portion 14 of the drilling screw 11 is sharp and the small-diameter parallel screw portion 15 is as small as 1.8 mm, a C-shaped steel plate is used when driving the drilling screw with a screwdriver of an impact type air-driven screw tightener. The structural material 1 is hardly deformed, and the drilling screw 11 that has been tightened first hardly sinks to the gypsum board 2. Further, the release paper 6 is not damaged or the screw is not lifted, and the reduction amount of the loosening torque of the previously driven drilling screw 11 is 1.4 kgf · cm or less, which is much smaller than the case of driving the conventional drilling screw. At the same time, a relaxation resistance value of 5.0 kgf · cm or more was obtained, which is higher than the conventional method of fastening screws with an electric screwdriver without driving them.

Further, the outer diameter of the small-diameter parallel screw portion 15 is 2.1 mm.
The result of the experiment for fastening the drilling screw 11 expanded to the above with an impact type air driven screw tightener shows that the loosening torque value of the conventional method of fastening with an electric screwdriver is less than 3.0 kgf.cm, 0.5 mm or 0. It has been confirmed that it is effective to form the outer diameter of the small-diameter parallel screw portion 15 to be 1.8 mm or less in order to suppress the impact at the time of driving for the C-shaped steel plate structural material having a thickness of 8 mm. .

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0019]

As described above in detail, the drilling screw of the present invention reduces the deformation and vibration of the thin steel plate due to the impact when the thin steel plate is driven by the impact type air driven screw tightener. Therefore, the reduction of the load resistance and the fastening force due to the driving of the drilling screw into the gypsum board and the thin steel plate is eliminated, so that the screwing work by the impact type air driven screw tightener can be effectively performed.
In addition, the pulling resistance is increased as compared with the conventional construction using a screwdriver, and the number of rotations of the screw during construction is small, so that the amount of gypsum powder discharged from the gypsum board is small and the work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a front view of a drilling screw of the present invention.

FIG. 2 is an explanatory view of fastening the drilling screw of FIG. 1 to a gypsum board and a C-shaped thin steel plate by an impact type air driven screw tightening machine, and a sectional view showing a state at the time of driving.

FIG. 3 is a cross-sectional view showing a state in which a drilling screw is rotated and fastened from the state of FIG.

FIG. 4 is an explanatory view for fastening a conventional drilling screw to a gypsum board and a C-shaped thin steel plate by an impact type air driven screw tightening machine, and a cross-sectional view showing breakage of the coated paper of the gypsum board.

FIG. 5 is an explanatory view of fastening a conventional drilling screw to a gypsum board and a C-shaped thin steel plate by an impact type air driven screw tightening machine, and a cross-sectional view showing breakage of a fitting portion of the steel plate.

[Explanation of symbols]

 1 C type steel plate structural material 2, 3 Gypsum board 11 Drilling screw 12 Trumpet head 13 Parallel screw part 14 Tapered screw part 15 Small diameter parallel screw part 16 Tapered bit part 17 Double thread screw thread

Claims (1)

[Claims] 1. A parallel thread part having a trumpet head at one end and a small-diameter parallel thread part continuously formed via a taper thread part, and a taper bit part is provided at the tip of the small-diameter parallel thread part, and the small-diameter part from the parallel thread part. When fixing the gypsum board to a thin steel plate using a drilling screw formed by reducing the height of the screw thread connected to the screw part in the small diameter parallel screw part, load the drilling screw into an impact type air driven screw tightener. Driving the drilling screw into the gypsum board with the driver of the impact type air driven screw tightener,
The taper bit part of the drilling screw penetrates the gypsum board to reach the thin steel plate, and the small-diameter parallel screw part penetrates the thin steel plate to stop. Then, the drilling screw is rotated by a driver to The small-diameter parallel screw part fitted to the steel plate gives a driving force in the penetrating direction by the screw thread of the drilling screw, the taper screw part enlarges the hole and taps, and the parallel screw part is thin. A construction method of penetrating a steel plate, and when the trumpet head enters the gypsum board and the height of the trumpet head matches the surface of the gypsum board, the rotation of the driver is stopped and the gypsum board is fixed to the thin steel plate.