JPH0722115U - Screws for fixing building materials and plate material fixing structure using the same - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a building material fixing screw for simply and quickly fixing different kinds of building materials such as joists and deck materials. [Structure] A shaft portion 26 of a screw 6 for fixing a building material has a drill portion 26a formed at a tip side portion of the shaft portion 26, and a head 16 from the head 16 that coincides with the upper surface of the deck material 5 to the tip of the shaft portion 26. With the screw portion 26b formed in the shaft portion 26 portion including the position up to the distance of the thickness of the deck material 5 toward the side,
The screw 6 can be screwed into the deck member 5 and the joist 4 while sequentially forming holes in the deck member 5 and the joist 4, and the screw member 26b allows the deck member 5 and the joist 4 to be fastened simply and quickly while closely contacting each other. be able to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a building material fixing screw for fixing a wooden deck material to a joist such as a balcony, and a plate material fixing structure using the screw.

[0002]

[Prior art]

 FIG. 4 shows a vertical sectional view of the floor portion of the balcony. This figure is used to explain the conventional fixing structure for fixing the deck plate to the joist and the fixing screw used for this. A joist 34 is horizontally laid between the joist hook 32 and the girder 33 on the outer wall side, and a PVC deck plate 35 is laid on the joist 34 without any gap. When attaching the deck plate 35 to the joist 34, a prepared hole is made in advance in the deck plate 35 and joist 34, and a tapping screw 36 is screwed into the prepared hole to fix the deck plate 35 to the joist 34. The tapping screw 36 is formed with a screw portion which enables tapping by itself.

[0003]

[Problems to be solved by the device]

 However, in such a conventional plate material fixing structure, since tapping screws 36 are used as the fixing or mounting means, the step of pre-drilling the deck plate 35 and joist 34 in advance is indispensable, and the mounting work is complicated. However, there is a problem that the work takes time.

The present invention has been made in view of such problems, and a screw for fixing a building material that enables a pilot hole to be drilled at the same time when screwed, and a structure using the screw for fixing the building material. The aim is to provide a fixing structure for simply and quickly fixing the plate material to the material.

[0005]

Means for Solving the Problems To achieve the above object, a screw for fixing a building material according to the present invention is a drill portion formed at a tip portion of a shaft portion, and the drill portion and the head side of the shaft portion. And a threaded portion formed in a portion between the end and the end.

Further, the plate material fixing structure according to the present invention is for fixing a plate material to a structural material by using a building material fixing screw, and the shaft portion of the building material fixing screw has a tip portion of this shaft portion. And a screw part formed so as to straddle the plate material and the structural material when the screw for fixing the building material is screwed to the completely fixed state, and the screw part is the tip of the shaft part. It is characterized in that it is formed by escaping a part up to the same distance as the thickness of the plate material toward the head side end thereof.

[0007]

[Action]

 According to the building material fixing screw of claim 1, since the shaft portion includes the drill portion formed at the tip portion of the shaft portion, the screw can be screwed to the member into which the screw is screwed from the drill portion. By screwing in, the screw itself can be screwed in while sequentially forming the pilot hole in this member.

According to the plate material fixing structure of claim 2, the shaft portion of the building material fixing screw has the drill portion formed at the tip portion of the shaft portion and the building material fixing screw in the fixing completed state. Since it has a screw part that is formed so as to straddle the plate material and the structural material when it is screwed up to, by screwing the screw into the plate material from the drill part, a sequential prepared hole is made between the plate material and the structural material. This screw can be easily screwed in while forming. Further, according to the main fixing structure, since the screw portion is formed by escaping from the tip of the shaft portion toward the end on the head side thereof up to the same distance as the thickness of the plate material, the drilling of the structural material is performed. At this time, the screw part is not screwed into the plate. Therefore, it is possible to prevent the plate member from being lifted up from the structural member by the screw portion, and to prevent the plate member from being fixed to the structural member in a lifted state.

[0009]

[Embodiment] An embodiment in which a building material fixing screw and a fixing structure using this building material fixing screw according to the present invention are applied to a floor portion of a balcony will be described below with reference to the accompanying drawings. . As shown in the vertical sectional view of FIG. 1, between the joist 2 fixed to the outer wall W side and the girder 3 supported by a girder (not shown), an extruded aluminum member is formed. A joist 4 is hung horizontally. Four wooden deck materials 5 are spread on the joist 4 without any gap. Each deck member 5 is fixed to the joist 4 by two screws 6 of the present invention, which will be described in detail below, at two front and rear positions in the left-right direction of the drawing.

FIG. 2 is a side view showing the structure of the screw 6 for fixing each deck member 5 to the joist 4. The screw 6 includes a head portion 16 and a shaft portion 26, and the head portion 16 is a dish-shaped, so-called countersunk screw. A drill portion 26a is formed at the tip portion of the shaft portion 26, and a screw portion 26b is formed at an intermediate portion between the drill portion 26a and the head portion 16 side. A drill blade is formed in the drill portion 26a at the tip end portion, and the drill portion 26a forms a prepared hole in the deck material 5 and the joist 4. A screw thread is formed on the screw portion 26b in the middle portion, and the screw portion 26b is positioned at the boundary portion between the deck material 5 and the joist 4 with the screw 6 being most screwed. Then, the deck member 5 and the joist 4 are fixed to each other by the screw portion 26b.

The concrete size of the screw 6 is as shown in the figure, but it is determined in consideration of the thickness of the deck material 5 and the like. Explaining the main part, the screw part 26b is formed over a region having a width of 25 mm from a position 10 mm to a position 35 mm from the upper end of the head 16. Therefore, when the screw 6 is most screwed into the deck material 5 having a thickness of 30 mm, the portion having a width of 20 mm from the upper end of the screw portion 26b is screwed with the female screw formed on the inner surface of the hole of the deck material 5 to form the screw portion 26b. A portion of the width of 5 mm from the lower end of the is penetrated to the lower side of the deck material 5 and screwed with the female screw formed on the inner surface of the hole of the joist 4. However, since the total length of the screw 6 is 68 mm, if the vertical dimension of the joist is 60 mm, there is no risk of the screw penetrating the entire joist 6. Since the screw thread engraved on the screw portion 26b also has a role of forming a female screw in these building materials before fixing the deck material 5 and the joist 4, the height of the thread is increased to facilitate tapping. Is relatively low at about 0.355 mm.

Hereinafter, a construction method of fixing the deck material 5 to the joist 4 using the screw 6 of FIG. 2 will be described with reference to FIG.

First, the drill portion 26a at the tip of the screw 6 is pushed to the required position of the deck material 5 and rotated, and a vertical hole is made in the wooden deck material 5 (FIG. 3A). As a result, a prepared hole for forming an internal thread is formed in the deck material 5.

Then, a hole is also made in the joist 4 on the lower side of the deck material 5 (FIG. 3B). As a result, a pilot hole for forming an internal thread is also formed in the joist 4. In this case, the screw portion 26b has not yet started to be screwed into the deck member 5, and even if the screw 6 is not screwed in due to the drilling of the relatively hard joist 4 made of aluminum, There is no inconvenience such as the floating of the lumber 5.

When the screw 6 is further screwed in, the drill portion 26a penetrates the upper plate of the joist 4, and at the same time, a female screw is formed in the prepared hole of the deck material 5 from the upper portion by the screw portion 26b (FIG. 3 (c)). In this case, the screw 6 itself has pre-drilled a hole in the deck material 5 and the joist 4, and there is little resistance to screwing in the screw 6, and the female screw once formed in the pilot hole of the deck material 5 is crushed after that. Does not occur.

When the screw 6 is further screwed in, a female screw is also formed in the prepared hole of the joist 4 by the screw portion 26b, and thereafter, the upper surface of the head 16 and the upper surface of the deck material 5 are aligned with each other, and the fixing work is completed. (FIG. 3 (d)). In this case, since the screw portion 26b is screwed over both the internal thread of the deck material 5 and the internal thread of the joist 4, the joist 4 and the deck material 5 are firmly fixed.

As described above, according to the present embodiment, since the drill portion 26a is provided at the tip of the shaft portion 26, it is possible to form the pilot hole in the deck material 5 and the joist 4 by the rotation of the drill portion 26a. The screw 6 can be easily screwed in. Further, since the shaft portion 26 is provided with the screw portion 26b in the intermediate portion between the drill portion 26a and the head portion 16, the screw portion 26b makes the deck material 5 and the joist 4 closely contact with each other when the screw 6 is most screwed. They can be fixed to each other while they are left alone. That is, it is possible to easily fix the deck material 5 and the joist 4 in close contact with each other by a single screw-in operation without making a preliminary hole in advance as in the conventional case. However, since the screw portion 26b is formed on the upper portion of the shaft portion 26, it is possible to prevent the deck material from rising when the screw 6 is screwed in.

Although the fixing structure for fixing the deck material 5 to the joist 4 of the balcony is used in the present embodiment, various building materials can be easily and quickly fixed to each other by the same fixing structure. However, the structural material such as joists 4 is preferably hollow from the viewpoint of facilitating screwing when tapping to form a female screw in the prepared hole on the plate material side such as the deck material 5.

Further, with respect to the screw 6, the drill portion 26a is formed only at the extreme tip of the shaft portion 26, but the drill portion 26a may be formed from the tip of the shaft portion 26 to the region adjacent to the screw portion 26b. . As a result, it becomes easier to send the shavings out of the hole when making a hole, and it becomes relatively easy to make a hole in the deck material 5.

Further, in the region where the screw portion 26b is to be formed, the screw 6 is screwed into the deck material 5 most, and the upper portion of the screw portion 26b is screwed into the female screw of the deck material 5 in the fixing completed state. It can be arbitrary as long as the lower part of it is screwed into the female thread of the joist 4. However, the screwing amount of the screw portion 26b with the female screws of the deck member 5 and the joist 4 needs to be a predetermined amount or more from the viewpoint of securing the fixing strength.

[0021]

[Effect of device]

 As described above, according to the building material fixing screw of the present invention, the shaft portion is provided between the drill portion formed at the tip end portion of the shaft portion and the head side end of the shaft portion of the drill portion. Since it is provided with a screw portion formed in the portion, it is possible to screw the screw itself while sequentially forming the prepared hole in the member into which the screw is screwed. Therefore, the screwing work can be performed easily and in a short time, and the workability can be improved.

Further, according to the plate material fixing structure of the present invention, since the shaft portion of the building material fixing screw has the drill portion and the screw portion, by screwing the screw from the drill portion into the plate material, This screw can be easily screwed in while forming a pilot hole in the joist. Further, according to the plate material fixing structure of the present invention, since the screw portion is formed by escaping from the tip of the shaft portion toward the head side end, a portion up to the same distance as the thickness of the plate material. It is possible to prevent that the screw portion is not screwed into the plate material when the hole is drilled and the plate material is lifted from the structure material and fixed to the structure material. Therefore, the work of fixing the plate member to the structural member can be performed easily and in a short time, and the workability can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a balcony to which a plate material fixing structure of an embodiment is applied.

FIG. 2 is a view showing a structure of a building material fixing screw used in the fixing structure of FIG.

FIG. 3 is a cross-sectional view showing a method of fixing a plate material using the building material fixing screws of FIG.

FIG. 4 is a vertical cross-sectional view of a balcony to which a conventional fixing structure is applied.

[Explanation of symbols]

 4 Structural Material 5 Plate Material 6 Screw 16 Head 26 Shaft 26a Drill 26b Screw

Claims (2)

[Scope of utility model registration request] 1. A drill portion (26a) formed at a tip portion of a shaft portion (26) and a portion between the drill portion (26a) and a head (16) side end of the shaft portion (26). A screw for fixing a building material, comprising a formed screw part (26b). 2. A plate material fixing structure for fixing a plate material (5) to a structural material (4) using a building material fixing screw (6), the shaft portion (26) of the building material fixing screw (6). Is a drill part (26a) formed at the tip of this shaft part (26).
And when the building material fixing screw (6) is screwed in to a fixing completed state, the plate material (5) and the structural material (4)
And a screw portion (26b) formed so as to straddle
The threaded portion (26b) is formed by escaping a portion up to the same distance as the thickness of the plate material (5) from the tip of the shaft portion (26) toward the head (16) side end thereof. The fixed structure of the plate material.