JPH08219130A - Fastening tapping screw and binding method for binding agent to steel beam - Google Patents

Abstract

PURPOSE: To provide fastening tapping screws which can easily and assuredly bond a metallic member and a wood member to each other without prepared holes needing working, and a binding method for a binding agent to a steel beam. CONSTITUTION: A binding ridge 4 having its slant surfaces 9 along the slope of a roof 6 is fastened on a steel beam 2, lower holes for screws are cut from the upper surface of the binding ridge 4 to the steel beam 2 by non-thread parts 16 formed near to screw head parts 12 than prepared hole cutting parts 14 by the prepared hole cutting parts 14 formed at the screw end parts of fastening tapping screws 10. After this process, a thread is formed by screw parts 18 for threaded engagement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening tapping screw for connecting a metal member and a wood member and a method for connecting a connecting material to a steel beam.

[0002]

Beams are commonly used to support the load of the roof of a building.

As this beam, a wooden beam has been widely used conventionally.

When such a beam is used to support the load on the roof, a wooden binder having an inclined surface along the slope of the roof is joined to the upper surface of the beam by nailing or the like, and the roof is connected to the binder. The material is placed and fixed.

[0005]

In recent years, it has become difficult and expensive to obtain wood beams due to the difficulty of obtaining wood and the increase in price.

Therefore, it is conceivable to use a steel beam instead of the wooden beam.

When the roof load is supported by such a steel beam, if the roof material is placed and fixed by using the conventionally used wood-like connecting material, the steel beam and the wood-like material are connected. It cannot be joined to the material by nailing.

[0008] Therefore, when connecting by general metal fittings or bolts, it is necessary to process the steel beam and the connecting hole in the connecting material, which requires time and labor for manufacturing. Will be increased.

The present invention has been made by paying attention to the above-mentioned conventional problems, and an object thereof is to fasten a metal member and a wood member easily and surely without requiring preparation of holes. To provide a method for connecting a bonding material to a tapping screw and a steel beam for use.

[0010]

In order to achieve the above object, the invention of claim 1 is a tapping screw for fastening which joins a metal member and a wood member, by cutting a pilot hole for the screw in the metal member. Prepared hole cutting portion of the screw tip portion to be formed, a non-threaded portion formed from the screw head than the pilot hole cutting portion, formed between the non-threaded portion and the screw head, of the metal member And a threaded portion into which the screw is cut and screwed into the prepared hole.

According to a second aspect of the present invention, in the first aspect,
The non-threaded portion is characterized in that it has a length sufficient to allow the threaded portion to enter the wood member after the pilot hole cutting portion has penetrated the wood member to reach the metal member.

According to a third aspect of the present invention, in the first or second aspect, a non-threaded portion having a length that is at least longer than the thickness of the wood member at the penetrating position is formed between the threaded portion and the screw head. It has a feature.

According to a fourth aspect of the present invention, there is provided a method of connecting a binding material to a steel beam, comprising a wooden binding material having a sloped surface along a slope of a roof on the steel beam. The prepared hole cutting part formed at the tip part penetrates the bond material while maintaining the non-threaded state with the bond material by the non-threaded part formed from the upper surface of the wood-like bond material to the screw head rather than the prepared hole cut part. After that, a pilot hole for a screw is cut and formed in the steel beam by the pilot hole cutting portion, and a screw portion formed between the non-threaded portion and the screw head is formed for the cut pilot hole for the screw. The feature is that a screw is cut and screwed into the pilot hole for the screw.

[0014]

In the invention according to claim 1 of the above construction, a prepared hole for a screw is cut and formed in the metal member by the prepared hole cutting portion of the screw tip, and the prepared hole is formed by the screw portion after the prepared hole is formed. The screw can be cut and screwed into the screw, and the non-threaded portion formed from the screw head rather than the pilot hole cutting portion prevents screwing with the wooden member, thus rotating the wooden member with respect to the metal member. Can be prevented, and the positional displacement of the wooden member can be prevented.

According to the second aspect of the present invention, the non-threaded portion is sufficient to allow the threaded portion to enter the wood member after the prepared hole cutting portion reaches the metal member through the wood member. By setting such a length, the threaded portion does not screw with the wood member before the prepared hole cutting portion reaches the metal member, and the rotational force is not applied to the wood member. It is possible to reliably prevent rotation of the wooden member with respect to, and to prevent displacement.

According to the third aspect of the present invention, the non-threaded portion formed between the screw portion and the screw head causes the non-threaded portion to become the wooden member when the screwing of the screw portion to the metal member is completed. Since the non-screwed state is achieved, the wooden member can be prevented from being lifted up with respect to the metal member and a reliable fastening state can be obtained.

According to another aspect of the present invention, a tapping screw for fastening is used to cut and form a pilot hole in a steel beam, and then a screw portion of the tapping screw for fastening is used to cut the screw into the pilot hole. By combining them, it is possible to easily and surely bond the wood-like binder to the steel beam.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 to 5 are views showing a fastening tapping screw according to an embodiment of the present invention and a method of joining a joining material to a steel beam using the tapping screw.

The tapping screw 10 for fastening is configured to fasten the upper surface of a steel beam made of H-shaped steel, which is a metal member, to a joining ridge 4 which is a joining member which is a wooden member.
In addition, this combined ridge 4 is adapted to support two roof panels 8 on the top of the roof 6, and has two inclined surfaces 9 along the slope of the roof 6 on the upper surface thereof. The top lower surface of the roof panel 8 is placed and fixed on the surface 9. The fastening tapping screw 10 for fastening the steel beam 2 and the joint ridge 4 is composed of a screw head 12, a pilot hole cutting portion 14, a non-threaded portion 16, and a screw portion 18. There is.

The screw head 12 is in a state in which the insertion engaging portion 20 for inserting a tool such as a screwdriver and applying a rotational force is recessed.

The prepared hole cutting portion 14 is formed at the tip of the screw, penetrates the joint ridge 4 from the inclined surface 9 formed on the upper surface of the joint ridge 4, and the upper surface of the flange portion 2a of the steel beam 2. To penetrate the flange portion 2a to cut and form a prepared hole for a screw in the flange portion 2a.

The non-threaded portion 16 is formed at a position closer to the screw head 12 than the pilot hole cutting portion 14, and the length of the non-threaded portion 16 is such that the pilot hole cutting portion 14 connects the connecting ridge 4 with each other. The screw portion 18 is set to have a length sufficient to allow the screw portion 18 to enter the inclined surface 9 of the coupling ridge 4 after it penetrates and reaches the upper surface of the flange portion 2a of the steel beam 2. In this way, the non-threaded portion 16
Thus, until the prepared hole cutting portion 14 reaches the upper surface of the flange portion 2a of the steel beam 2, the screw portion 18 is attached to the inclined surface 9 of the connecting ridge 4.
When the lower hole cutting portion 14 reaches the upper surface of the flange portion 2a of the steel beam 2, the rotation force is not applied to the joint ridge 4 by the screwing of the screw portion 18 by reaching the position The position of the connecting ridge 4 is prevented from being displaced until reaching the position.

The screw portion 18 includes the non-screw portion 16 and the screw head 1.
2 is formed between the steel beam 2 and the steel beam 2 by cutting and screwing a screw into a screw pilot hole formed in the flange portion 2a of the steel beam 2 by the pilot hole cutting portion 14. 2 and the connecting ridge 4 can be fastened together. The thread of the threaded portion 18 is set to have a larger outer diameter than the outer circumference of the pilot hole cutting portion 14, so that the pilot hole for the screw formed by the pilot hole cutting portion 14 is securely screwed. It can be formed and screwed.

Next, such a fastening tapping screw 1
Regarding the method of connecting the connecting ridge 4 to the steel beam 2 using 0,
1 to 3 will be mainly described.

First, the lower surface of the joint ridge 4 is placed on the flange portion 2a of the steel beam 2.

In this state, as shown in FIG. 1, the prepared hole cutting portion 1 formed at the screw tip portion of the fastening tapping screw 10.
4 is applied to the inclined surface 9 of the coupling ridge 4, the tip of a tool such as a drill is inserted and engaged with the insertion engaging portion 20 of the screw head 12, and the fastening tapping screw 10 is rotated, whereby the pilot hole cutting portion 14 cuts the joint ridge 4 and penetrates the joint ridge 4, and reaches the upper surface of the flange portion 2 a of the steel beam 2.

In this case, adjacent to the pilot hole cutting portion 14, the pilot hole cutting portion 14 penetrates the joint ridge 4 to reach the upper surface of the flange portion 2a, and then the screw portion 18 reaches the inclined surface 9 of the joint ridge 4. Since the length is set to be sufficient for obtaining, the screw portion 18 and the connecting ridge 4 remain in a non-threaded state, the rotational force due to the screwing is not applied to the connecting ridge 4, and the positional deviation is prevented. The prepared hole cutting portion 14 reaches the upper surface of the flange portion 2a.

Next, the fastening tapping screw 10 is further rotated, and the flange portion 2a of the steel beam 2 is cut by the pilot hole cutting portion 14 to form the flange portion 2a of the steel beam 2 as shown in FIG. A pilot hole 24 for a screw is formed so as to penetrate therethrough. As described above, by forming the pilot hole 24 in the flange portion 2a of the steel beam 2 by the pilot hole cutting portion 14, it is not necessary to previously form the pilot hole in the connecting ridge 4 or the steel beam 2, The labor of processing can be omitted, and it is not necessary to align the pilot holes.

Further, the fastening tapping screw 10
When the screw is rotated, the non-threaded portion 16 passes through the pilot hole 24, and the threaded portion 18 formed between the non-threaded portion 16 and the screw head 12 is formed on the flange portion 2a of the steel beam 2. Pilot hole 2
A screw is cut on the inner surface of 4 to be screwed, and the threaded portion 18 is screwed into the pilot hole 24 so that the joint ridge 4 is securely fastened to the steel beam 2 between the screw head 12 and the screw portion 18. The Rukoto.

Therefore, it is possible to omit the labor required for processing the prepared hole for the steel beam 2 and the connecting ridge 4 as in the conventional case.

FIG. 6 shows a tapping screw for fastening according to another embodiment of the present invention.

The fastening tapping screw 26 is shown in FIGS.
In addition to the state of the tapping screw for fastening shown in FIG.
A specific threaded portion 28 longer than the thickness t (see FIG. 1) at the penetrating position of the coupling ridge 4 is formed between the screw head 12 and the screw head 12.

As described above, by forming the specific thread portion 28 longer than the thickness t at the penetrating position of the joint ridge 4 between the screw portion 18 and the screw head 12, the steel beam of the screw portion 18 is formed. This non-screwed portion 28 is in a non-screwed state with the joint ridge 4 when the screwing to the 2 is completed, preventing the joint ridge 4 from moving in the direction opposite to the fastening direction with respect to the steel beam 2 and lifting up. It is possible to obtain various fastening states.

The other structure and operation are similar to those of the above-mentioned embodiment, and the explanation thereof is omitted.

The present invention is not limited to the above embodiments, but various modifications can be made within the scope of the present invention.

For example, in the above-mentioned embodiment, the case where the steel beam and the joint ridge are fastened by the fastening tapping screw has been described, but the present invention is not limited to this example, and the case where the wooden member is fastened to the metal member. For example, it can be applied to various cases.

[0038]

According to the first aspect of the present invention, a prepared hole for a screw is cut and formed in a metal member by a prepared hole cutting portion of a screw tip portion, and after the prepared hole is formed, a screw portion is screwed into the prepared hole. Can be cut and screwed together, and the non-threaded portion formed on the screw head rather than the pilot hole cutting portion prevents screwing with the wooden member and prevents rotation of the wooden member with respect to the metal member. However, there is an effect that the wooden member can be prevented from being displaced. According to the second aspect of the present invention, the non-threaded portion has a length sufficient to allow the threaded portion to enter the wooden member after the prepared hole cutting portion penetrates the wooden member and reaches the metal member. By setting, before the pilot hole cutting portion reaches the metal member, the screw portion does not screw with the wooden member, the rotational force is not applied to the wooden member, and the wooden member with respect to the metal member There is an effect that the rotation can be surely prevented and the displacement can be prevented.

According to the third aspect of the present invention, the non-threaded portion formed between the threaded portion and the screw head causes the non-threaded portion to be not in contact with the wooden member when screwing of the threaded portion to the metal member is completed. Since the threaded state is achieved, there is an effect that it is possible to prevent the wooden member from being lifted up with respect to the metal member and to obtain a reliable fastened state.

According to the fourth aspect of the invention, a pilot hole is formed in the steel beam by using the tapping screw for fastening, and then the screw is cut into the pilot hole by the thread portion of the tapping screw for fastening and screwed. By doing so, there is an effect that a wood-based binder can be easily and surely joined to the steel beam.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a method of joining a bonding material to a steel beam according to an embodiment of the present invention, in which the pilot material is penetrated by a fastening tapping screw so that a prepared hole cutting portion reaches the steel beam. It is a figure.

FIG. 2 is a cross-sectional view showing a state in which a pilot hole for a screw is formed through the pilot beam cutting portion through the pilot hole cutting portion from the state of FIG. 1;

FIG. 3 is a cross-sectional view showing a state in which the fastening tapping screw is further rotated from the state of FIG. 2 to cut and screw a thread portion of the fastening tapping screw into a pilot hole for the screw.

FIG. 4 is an enlarged front view showing a fastening tapping screw of the present embodiment.

FIG. 5 is a cross-sectional view showing a state in which a roof panel is placed and supported on a bonding material that is fastened to a steel beam using the fastening tapping screw of the present embodiment to build a roof.

FIG. 6 is a front view showing a fastening tapping screw according to another embodiment of the present invention.

[Explanation of symbols]

 2 Steel Beam 4 Combined Building 9 Inclined Surface 10, 26 Tapping Screw for Fastening 12 Screw Head 14 Prepared Hole Cutting Part 16 Non-Screwed Part 18 Screwed Part 24 Prepared Hole 28 Non-Screwed Part

Claims (4)

[Claims] 1. A tapping screw for fastening a metal member and a wood member, wherein a pilot hole cutting portion for cutting and forming a pilot hole for the screw is formed on the metal member, and the pilot hole cutting portion. A non-screw part formed on the screw head, and a screw part formed between the non-screw part and the screw head, and a screw part that is screwed into the prepared hole of the metal member by screwing. A tapping screw for fastening, comprising: 2. The non-threaded portion according to claim 1, wherein the non-threaded portion has a length sufficient to allow the threaded portion to enter the wooden member after the prepared hole cutting portion reaches the metal member through the wooden member. A tapping screw for fastening characterized in that 3. The fastening according to claim 1, wherein a non-screw portion longer than a thickness at a penetration position of the wood member is formed between the screw portion and the screw head. Tapping screw. 4. A method for connecting a binding material to a steel beam, which comprises joining a wood-based binding material having a sloped surface along a roof slope onto the steel beam, the method comprising: After piercing the binding material while maintaining the non-threaded state with the binding material by the non-threaded portion formed from the top surface of the wood-based binding material to the screw head portion from the pilot hole cutting portion by the formed pilot hole cutting portion , A lower hole for a screw is cut and formed in a steel beam by the lower hole cutting portion, and a screw portion formed between the non-threaded portion and the screw head is used for the screw for the cut lower hole for the screw A method for connecting a bonding material to a steel beam, characterized in that a screw is cut in the prepared hole and screwed.