JP2004060356A - Screw for constructing colorbest roof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw piercingly fitted to a coping, a colorbest(R), and a sheathing roof board from above the coping in a roof structure having the roof board as thick as T1, the colorbest(R) as thick as T2 laid on the roof board, and the coping as thick as T3 laid on the vest substantially in the condition of T1=T2=T3. <P>SOLUTION: The screw has a plate-shaped head and a shank extending from the head together, and constituting a self-drill screw provided with a drill at the extremity of the shank and also constituting the front end part including the drill, tail end including the head, and a middle part positioned therebetween. A screw thread is formed only in the middle part. Next formulas are expressed, L1≥T3+T2, approximately L2=T3+T2, approximately L3=T1, L1 stands for length of the front end, L2 stands for length of the middle, and L3 stands for length of the tail end. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a screw used for a color vest roof structure such as a roof ridge or a wall joint in a building.
[0002]
[Prior art]
Conventionally, a color vest roof structure has a ridge portion of a roof as shown in FIG. 3A and a wall connecting portion as shown in FIG. 3B.
[0003]
As shown in FIG. 3 (A), the ridge of the roof butt the ground boards 2 and 2 together with the rafters and other beam members 1 and 1 at a predetermined angle, and lay the color vest 3 on the ground board. Further, on the opposing ends of the collar vests 3 and 3, there are provided skirts 4, 4, respectively. By protruding, these three members (the field board 2, the color vest 3, and the Kasagi 4) are connected. The caps 4 are covered with a ridge formed of a thin metal plate 6.
[0004]
As shown in FIG. 3 (B), the wall joining portion abuts the field board 1 together with the rafters and other beam members 1 at a predetermined angle to the wall section 7, and lays the color vest 3 on the field board. Further, a cap 4 is provided on the end of the collar vest 2, and an attachment 5 penetrating the cap 4, the collar vest 3, and the base plate 2 from above the cap 4 is pierced. The three parties (the field board 2, the color vest 3, and the Kasagi 4) are combined. In addition, the cap 4 is covered with a rain gutter made of a metal sheet 6.
[0005]
Conventionally, the attachment 5 usually uses nails or wood screws.
[0006]
[Problems to be solved by the invention]
When a nail is used as the attachment 5, the nail is pierced by a hammer from the surface of the coping 4, but it is difficult for the nail to go straight, and the nail may be bent halfway, and there is a problem in workability. There is a problem. That is, since the nail is made to enter the wooden cap 4 and then strikes the hard collar vest 3, it becomes difficult to enter there and it is easy to bend. In addition, in the case of nails, even when the nail is penetrated from the shade 4 to the base plate 2 through the color vest 3, the holding force depends only on the wooden shade 4 and the base plate 2. However, there is a problem that sufficient holding power cannot always be exerted.
[0007]
On the other hand, when a wood screw is used as the attachment 5, since the rotational movement of the screw thread generates a thrust force, there is an advantage that the straightness is superior to the nail and the holding power is superior. However, since the wood screw hardly enters the hard collar vest 3 after penetrating the cap 4 and runs idle, there is an inconvenience that the pilot hole must be previously drilled with a drill or the like prior to construction. In addition, even when the pilot hole is formed, when the wood screw enters the hard collar vest 3 through the skirt 4, the approach speed in the thrust direction is reduced, so that the skirt 4 is lifted from the collar vest 3. Is generated. That is, while entering the wooden cap 4, the screw thread rotated at a predetermined rotation speed moves in a thrust manner according to the screw pitch. Also reduce the speed of movement. For this reason, since the thread at the subsequent portion of the wood screw rotates inside the cap 4 while reducing the thrust movement, the cap 4 is moved in the retreating direction and rises from the collar vest 3. Even after the wood screw has penetrated the base plate 2, since the raised cap 4 is engaged with the thread, it does not come into pressure contact with the collar vest 3. There is a problem that the operation is completed while leaving a gap therebetween.
[0008]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention provides a color vest roof construction screw that solves the above-mentioned problems, and as a means thereof, includes a field base plate having a thickness T1 and a thickness T2 laid on the field base plate. In a roof structure having a color vest and a thickness T3 provided on the color vest and having a thickness of approximately T1 = T2 = T3, the roof vest, the color vest and the field board are penetrated from above the hood. The screw is integrally mounted with a dish-shaped head and a shank extending from the head, and constitutes a self-drilling screw having a drill portion at the tip of the shank. , A tail end including the head, and an intermediate portion located between the tip end and the tail end. A thread is formed only in the intermediate portion, and the length of the tip end is The length is L1, the length of the middle part is L2, and the length of the tail end is L3. When, L1 ≧ T3 + T2, approximately L2 = T3 + T2, lies in configured to be substantially L3 = T1.
[0009]
At this time, it is preferable that the dish-shaped head is provided with reamer teeth on the lower conical surface.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
[0011]
In FIG. 1, a roof structure 9 shown together with a screw 8 of the present invention is the same as the conventional structure shown in FIG. 3, and has a thickness T1 of a field board 2 and a thickness T2 laid on the field board. (Having a thickness T2 when two sheets are stacked) and a cap 4 having a thickness T3 provided on the color vest, and are configured so that substantially T1 = T2 = T3. After being integrated by screws 8, the upper surface of the coping 4 is covered with a thin metal plate 6 such as a ridge and a rain gutter.
[0012]
The screw 8 integrally includes a dish-shaped head 10 and a shank 11 extending from the head 10, and constitutes a self-drilling screw having a drill portion 12 at the tip of the shank 11. Although not shown, an engaging groove such as a plus groove or a minus groove for engaging a driver tool is formed on the upper surface of the head 10.
[0013]
The shank 11 has a neck portion 13 adjacent to the head portion 10 formed in a shank blank (a round bar having no thread, the same applies hereinafter), and a leg portion 14 adjacent to the drill portion 12 formed in a shank blank. A thread 15 is formed between the neck 13 and the leg 14.
[0014]
Accordingly, the screw 8 constitutes a tip portion 16 having a length L1 by a portion including the drill portion 12 and the leg portion 14, and constitutes an intermediate portion 17 having a length L2 by a shank portion with a thread 15. , A tail end portion 18 having a length L3 by a portion including the head portion 10 and the neck portion 13.
[0015]
Therefore, the length L1 of the distal end portion 16 is formed such that L1 ≧ T3 + T2, and in the illustrated example, L1 = T3 + T2. Further, the length L2 of the intermediate portion 17 is formed so as to be approximately L2 = T3 + T2. Further, the length L3 of the tail end portion 18 is formed such that L3 = T1.
[0016]
The dish-shaped head 10 is provided with reamer teeth 19 on the lower conical surface, and the reamer teeth 19 are inclined with respect to the diametrical direction of the head 10 and are spaced apart in the circumferential direction. Is provided.
[0017]
FIG. 2 shows an operation when the roof structure 9 is connected by the screws 8 having such a configuration.
[0018]
The roof structure 9 does not require the work of drilling a pilot hole as described in relation to the related art, and the screw 8 is screwed directly from above the cap 4.
[0019]
When the screw 8 is rotationally driven by a driver tool such as an electric screwdriver from a state where the screw 8 is set on the surface of the cap 4, as shown in FIG. Penetrate the color vest 3. As described above, the length L1 of the distal end portion 16 including the drill portion 12 and the leg portion 14 is formed so as to satisfy L1 ≧ T3 + T2. In the above, only the tip portion 16 is located in the hole, and the intermediate portion 17 having the thread 15 has not yet entered the hole. Therefore, the cap 4 is closely attached to the color vest 3 and does not rise.
[0020]
Subsequently, when the screw 8 is made to enter while rotating, the tip portion 16 including the drill portion 12 penetrates the base plate 2 by piercing it, and the intermediate portion 17 having the thread 15 enters the shed 4. Until the thread 15 penetrates the cap 4, the thread 15 moves in a thrust manner while rotating while moving in accordance with the screw pitch. Movement is impeded. That is, the approach speed is reduced by the thrust resistance, and as a result, as shown by an arrow U in FIG.
[0021]
However, when the screw 8 is further advanced and the screw thread 15 passes through the coping 4, the shank blank is formed over substantially the entire length of the hole corresponding to the thickness T3 of the coping 4, as shown in FIG. Since the neck 13 has entered, the skirt 4 is lowered as shown by the arrow D while being pressed by the head 10, and is pressed against the collar vest 3.
[0022]
The head 10 of the screw 8 presses the cap 4 and at the same time enters while cutting the surface of the cap 4 with the reamer teeth 19, and is buried in the cap 4. Thereby, as shown in FIG. 2 (D), the connection and integration of the base plate 2, the color vest 3 and the coping 4 with the screw 8 are completed. As described above, the surface of the cap 4 is covered with the metal sheet 6.
[0023]
As shown in the drawing, after the fastening is completed, the screw 15 of the intermediate portion 17 of the screw 8 is engaged over the entire thickness T1 of the base plate 2 and the thickness T2 of the collar vest 3, so that The holding power is guaranteed. Although there is no engagement by the screw 15 between the screw 8 and the cap 4, as described above, the cap 4 is pressed against the collar vest 3 by the head 10 of the screw 8, and 10 is engaged with the surface of the cap 4 in a immersive state, so that the necessary and sufficient fixing and holding force of the cap 4 is secured.
[0024]
【The invention's effect】
According to the present invention, in the roof structure including the hard collar vest 3, the screw 8 can be screwed and threaded in a straight-ahead state without the necessity of drilling a pilot hole, so that the workability is excellent. There is.
[0025]
In particular, at the time of screwing of the screw 8, the length L 1 of the tip portion 16 including the drill portion 12 which is a shank blank penetrates the thickness T 2 of the collar vest 2 and the thickness T 3 of the hedder 4, that is, Since L1 ≧ T3 + T2, the subsequent thread 15 does not enter the cap 4 until the hard collar vest 3 that generates a large thrust resistance is completely perforated. No lifting of the cap 4 is generated.
[0026]
Then, when the subsequent thread 15 enters over the collar vest 2 and the skirt 4, the skirt 4 tends to rise. The length L3 of the tail end 18 including the length of the tail piece 18 is formed to be a length corresponding to the length T1 of the capping piece 4, that is, approximately L3 = T1, so that the floating capping piece 4 is pressed against the color vest 3 once. As a result, it is possible to appropriately press down, and as a result, there is an effect that the three members of the base plate 2, the color vest 3, and the skirt 4 can be completely connected and integrated.
[0027]
Further, after the fastening is completed, the screw 8 engages the thread 15 of the intermediate portion 17 over the entire thickness T1 of the base plate 2 and the thickness T2 of the collar vest 3, so that a sufficient holding force is provided. Guarantee.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIGS. 2A and 2B show the operation of the present invention, wherein FIG. 2A is a cross-sectional view showing a state in which the tip of a screw pierces a collar vest and a cap, and FIG. FIG. 7C is a cross-sectional view showing a state where the tail end of the screw has entered the cap, and FIG. 7D is a cross-sectional view showing a state where the fastening is completed.
3A and 3B show a prior art of a color vest roof structure, in which FIG. 3A is a sectional view showing a ridge portion of a roof, and FIG. 3B is a sectional view showing a wall joining portion.
[Explanation of symbols]
2 Field board 3 Color vest 4 Kasagi 8 Screw 9 Roof structure 10 Head 11 Shank 12 Drill 13 Neck 14 Leg 15 Screw thread 16 Tip 17 Intermediate 18 Tail end 19 Ream tooth

Claims (2)

It has a field board of thickness T1, a color vest of thickness T2 laid on the field board, and a cap of thickness T3 provided on the color vest, and substantially T1 = T2 = T3. In the roof structure, a screw that is attached from above the heddle through the heddle, the color vest and the base plate,
The screw 8 integrally includes a dish-shaped head 10 and a shank 11 extending from the head, constitutes a self-drilling screw having a drill portion 12 at the tip of the shank, and has a tip portion 16 including a drill portion. A tail end portion 18 including the head portion and an intermediate portion 17 located between the tip end portion and the tail end portion are formed, and the thread 15 is formed only at the intermediate portion.
When the length of the front end portion is L1, the length of the middle portion is L2, and the length of the tail end portion is L3, L1 ≧ T3 + T2, approximately L2 = T3 + T2, and approximately L3 = T1. Feature: Color best roof construction screw. 2. The screw according to claim 1, wherein the lower conical surface of the dish-shaped head is provided with reamer teeth.

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