JP2003172328A - Fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastener capable of adhering and fixing a body part thereof and timber after completion of driving and screwing the fastener, not staining an outer surface of the timber, and not generating looseness and noises of a jointed timber with the elapse of time. <P>SOLUTION: This fastener is a semi thread type screw 1 having a head part 4 capable of engaging with a driver bit on one end side of the body part 2 and tip part 5 on another end side, and provided with screw 6 from a middle of the body part 2 over the tip part. Delayed heat reactivation type adhesive 8 which melts after completion of screwing by friction heat generated during screwing of the screw 1 is applied on a blank part 7 without the screw 6 on the body part 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fasteners such as nails, screw screws, and bolts used for joining timbers to each other such as floors and roof substrates of residential buildings.

[0002]

2. Description of the Related Art Generally, a fastener such as a screw or a screw called a nail or a wood screw and a bolt are used for connecting wood to each other.

The above-mentioned nail has a head at one end of the body and a tip at the other end, and is hammered into the laminated wood to fasten the wood. Also, screw screws and bolts are used for the laminated wood. The wood is fastened by screwing it in.

There are two types of screw screws, a full-screw type and a half-screw type. The former full-screw type is a head part with a groove in which one end of the body part can be engaged with a driver bit. And has a tip portion on the other end side, and has a structure in which a screw is provided over the entire length of this body portion,
The latter half-screw type is provided with a screw partially from the middle of the body to the tip, and a blank part is provided between the middle of the body and the head, where there is no screw of a length corresponding to the thickness of the timber to be fastened. It has a formed structure.

In order to fasten wood to wood using such a screw screw, the wood to be fastened is placed on the fastened wood and the bit of the electric screwdriver is engaged with the groove of the head, and the tip of the screw screw is engaged. Is pressed against the timber to be fastened, and the screw is rotated from the fastened timber to be fastened to the fastened timber by the action of the screw.

At the time of this screwing, when the tip of the body passes through the timber to be fastened and approaches the timber to be fastened, there is a time lag in screwing because the bite to the fastened timber is poor and the timber to be fastened is It will be lifted by the action.

In the case of a full-screw type screw screw, the lifted state is not filled, and if it is left as it is, it will be fastened with a gap.

In order to eliminate this gap, the screw screw once fastened is reversed to return the tip to a position above the gap, and then the timber to be fastened is pushed to overlap the timber to be fastened.
The screw is screwed in again with the gap removed.

As described above, when the full-screw type screw screw is used, there is a problem that since the clearance is eliminated, it takes a lot of time and effort to fasten the screw and the working efficiency is poor.

On the other hand, in the case of the half-screw type screw screw, even if the above-mentioned gap is formed during the screwing, when the screw screw is tightened, the head is cut when the blank portion passes through the timber to be fastened. The part abuts on the timber to be fastened and the blank part slips and rotates in the fastened timber, the head presses the fastened timber, the fastened timber overlaps the fastened timber, and the fastening can be performed without a gap. It will be.

As described above, the half-screw type screw screw has an advantage that the timber to be fastened can be fastened to the fastened timber without a gap by only one screwing operation and the workability is very good.

Further, in the above fastener, in order to obtain a loosening-preventing effect after fastening, it is considered that an adhesive is applied to the body in advance and the wood and the body are fixed with this adhesive. A nail is proposed by Jitsukō Sho 50-73772.

[0013]

By the way, in the case of a half-screw type screw screw, in the fastening state, the blank portion without the screw penetrates through the timber to be fastened, so that the blank portion and the timber to be fastened are separated. There is no connecting part in.

For this reason, when the timber to be fastened becomes thin after a lapse of years, a gap is created between the blank portion and the fastened timber, and the fastened timber loosens due to this gap, causing rattling and floor squealing. There is a problem that causes.

Also, in the case of fastening with nails or fastening with bolts, when wood thinning occurs, a gap is created between the body and the wood, and the gap loosens the wood.

Furthermore, in the case of a nail coated with the above-mentioned conventional adhesive, or when this adhesive is applied to a screw screw or a bolt, the adhesive is immediately melted by frictional heat at the time of driving and screwing, and the wood to be fastened is As it flows out to the outside and stains the surface, the adhesive flows out to the outside, so that it does not exist between the body of the fastener and the wood, resulting in a loosening prevention effect after fastening with the adhesive. There is a problem that you can not.

Therefore, an object of the present invention is to provide nails, bolts,
In fasteners such as screw screws, after the fastening and screwing of this fastener, the body and the wood can be adhesively fixed, the outer surface of the wood is not soiled, and even after years have passed. An object of the present invention is to provide a fastener that can be fastened without rattling or floor squealing of the fastened timber.

[0018]

In order to solve the above problems, the invention of claim 1 provides a fastener for driving, which has a head at one end of the body and a tip at the other end. In addition, a configuration is adopted in which a delayed heat reactivating adhesive that is melted after the completion of the driving due to frictional heat generated during the driving is applied.

According to a second aspect of the present invention, there is provided a fastener for screwing, wherein a head portion is provided at one end of the body portion and a screw is provided on the body portion, and screwing is completed in the body portion by frictional heat generated when the screw is screwed. This is a structure in which a delayed heat reactivation type adhesive that melts later is applied.

According to a third aspect of the present invention, the fastener for screwing has a head portion at one end side of the body portion for engaging a driver bit and a tip end portion at the other end side, and the middle portion of the body portion. The screw is a half-screw type screw having a screw extending from the end to the tip.

The invention of claim 4 adopts a constitution in which the delayed heat reactivation type adhesive is applied only to a blank portion of the body portion having no screw.

Here, the delayed heat reactivation type adhesive receives frictional heat generated when the fastener is driven into and screwed into the wood, and the reactivation start time due to this frictional heat is delayed. Therefore, it will melt after the fastener is driven or tightened, and will not flow out to the outer surface of the wood and stain the surface.

Further, the melted adhesive firmly bonds the body of the fastener to the wood, and does not cause rattling or floor squeal in the fastened wood even after a lapse of years.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

A half screw type screw screw 1 which is a first embodiment of the fastener shown in FIG. 1 has a driver bit engaged with one end of a body portion 2 having a circular shaft-shaped section and long in the axial direction. It has a head 4 having a groove 3 that can be formed, and a sharpened tip portion 5 on the other end side, and a screw 6 is formed from the middle of the body portion 2 to the tip portion 5. Between the head portions 4, there is a blank portion 7 which is a straight shaft-like shape having no screw.

The length of the body portion 2 is set according to the use, and the blank portion 7 has a length corresponding to the thickness of the timber to be fastened.

In the screw screw 1, the delayed heat reactivating adhesive 8 is applied to the outer surface of the blank portion 7. This delayed heat reactivation type adhesive 8 does not melt immediately when it receives heat, and is delayed in the reactivation start time so that it melts after receiving a heat for a predetermined period of time. It has a high fluid permeability and has a characteristic that the volume after revitalization expands. It is adhered to the outer surface of the body 2 by applying it to the outer surface of the body 2 in a fluidized state and drying it. .

In the illustrated example, the delayed heat reactivation adhesive 8 is applied to the entire length of the body 2 including the screw 6, but it may be applied only to the blank portion 7.

The screw screw 1 may be a full screw type other than the half screw type shown in FIG.
The nail 11 which is the second embodiment of the fastener shown in FIG.
Has a head portion 13 at one end and a tip 14 at the other end of the body portion 12 having a circular shaft shape, and the delayed heat reactivating adhesive 8 is applied to the outer surface of the body portion 12.

A bolt 21 which is the third embodiment of the fastener shown in FIG. 2B has a structure in which a head portion 23 is provided at one end of a body portion 22 and a screw 24 is provided on the body portion 22. The delayed heat reactivating adhesive 8 is applied to the outer surfaces of the body 22 and the screw 24.

The delayed heat reactivating adhesive 8 is a vinyl acetate type adhesive composed of a mixed solvent of triol and ethyl acetate, and is baked at a low temperature on the fastener shown in each embodiment. Apply by.

The fastener of the present invention has the above-mentioned structure. Next, a method of using a screw screw will be described.

To fasten the fastened timber B to the fastened timber A, the fastened timber A is overlaid with the fastened timber B, and the bit of the electric screwdriver is engaged with the groove 3 of the head portion 4 of the screw screw 1. The tip portion 5 is pressed against the fastened wood B, and the screw 6 is screwed from the fastened wood B toward the fastened wood A by the operation of the screw 6 while rotating the screw screw 1.

In the half-screw type screw screw 1, even if there is a gap between the fastened wood A and the fastened wood B during screwing, as the screw screw 1 is tightened, the blank portion 7 holds the fastened wood B in place. When the head 4 comes into contact with the fastened timber B at the time of passing, and the blank portion 7 slips and rotates in the fastened timber B, the head 4 presses the fastened timber B, and the fastened timber B is fastened. The timber A overlaps with the wood A and can be fastened without a gap.

When the blank portion 7 of the body 2 is rotated into the wood B to be fastened when the screw 1 is screwed in, frictional heat is generated, and the delayed heat applied to the body 2 is delayed. The reactivating adhesive 8 will receive this frictional heat.

As shown in FIG. 1B, when the screw B is screwed in and the timber B to be fastened is completely fastened to the timber A to be fastened, the delayed heat reactivating adhesive 8 is heated by the friction heat received at the time of screwing. It has the property of exerting an adhesive force by being dried and solidified after being liquefied after a delay of time. The adhesive 8 becomes a liquid having a high fluid permeability by being melted after the completion of screwing, and is solidified after permeating into the fibers of the wood by the liquefaction, so that the blank portion 7 and the fastened wood B are firmly bonded and fixed. As a result, even if the timber B to be fastened becomes thin over the years, there is no gap between the blank portion 7 and the timber B to be fastened due to the adhesive 8. It is possible to prevent rattling of wood B and ringing of the floor.

Since the delayed heat reactivation type adhesive 8 does not melt when the screw 1 is screwed in, the adhesive 8 does not flow out of the fastened wood B and the surface of the fastened wood B is prevented. There is no such thing as polluting.

When the delayed heat reactivation type adhesive 8 is applied to the entire length of the body portion 2 of the screw screw 1, the screw 6 and the fastening wood A can be firmly adhered and fixed, and the screw screw 1 is loosened. The stopping effect will be improved.

In the case of the nail 11 which is another fastener described above,
When it is driven into the timber to be fastened, the delayed heat reactivating adhesive 8 receives the heat from the friction during the driving, melts and liquefies after completion of the driving, and solidifies after penetrating into the fibers of the wood. The body 12 and the fastening timber can be firmly bonded and fixed.

Even when the fastener is the bolt 21, the delayed heat reactivating adhesive 8 is liquefied by the frictional heat received at the time of screwing and is liquefied by screwing the screw 24 provided on the body 22 Since it penetrates into the fibers and solidifies, the body 22 and the fastening timber can be firmly adhered and fixed.

[0041]

EXAMPLE Next, a half-screw type screw screw coated with a delayed heat reactivation adhesive and a half-screw type screw screw not coated with this adhesive were used to start loosening after screwing. The result of measuring the torque required for the operation is shown in FIG.

As shown in FIG. 3 (B), the measurement condition is a half-screw type in which the body has a diameter of 4.5 mm and a length of 90 mm, and a delayed heat reactivating adhesive is applied to the blank part. 103 mm using a screw screw (test piece A) and an unpainted half screw type screw thread (test piece B) of the same size
12mm thick plywood b is piled up on the square cedar a, and the whole length of the body is screwed in to fasten the plywood b to the cedar a, after which the torque required to cause the start of loosening of each specimen is passed. It was measured every hour.

As is clear from the measurement results of FIG. 3 (A), (Sample B) did not change significantly with each elapsed time,
Light force started to loosen.

On the other hand, in the case of (Sample A) of the present invention, the required torque to start loosening is larger than that of (Sample B) immediately after screwing, and the required torque to start loosening increases with time. It has been found.

Such a result is caused by the fact that the delayed heat reactivation adhesive has a delayed reactivation start time.

[0046]

As described above, according to the present invention, a delayed heat reactivating adhesive that melts after the completion of driving or screwing is applied to the body of the fastener by frictional heat generated when driving or screwing the fastener. Since it was applied, this adhesive will be melted after the completion of driving or screwing due to the friction heat received when driving or screwing into the wood, and will be solidified after penetrating into the wood fiber, and therefore, due to the adhesive melted after fastening. , The loosening prevention effect is surely obtained, and the body of the fastener and the wood can be firmly adhered and fixed. As a result, even if the timber to be fastened becomes thin over the years, the body and the wood Since they are fixed by an adhesive, there is no gap and the fastening state can be maintained for a long time.

Further, since the adhesive melts after the fastener is driven in or screwed in, the adhesive does not flow out of the fastened wood and the surface of the fastened wood is not soiled.

Further, when the fastener is a half-screw type screw screw, the delayed heat reactivation adhesive is applied only to the blank portion of the body portion where there is no screw.
The blank part and the wood can be firmly bonded and fixed,
As a result, even if the timber to be fastened becomes thin over the years, the blank portion and the fastened timber are fixed by the adhesive, so there is no gap, and the loose timber or floor of the fastened timber does not occur. It is possible to prevent ringing.

[Brief description of drawings]

1A is a front view showing a screw screw as a first embodiment of a fastener, FIG. 1B is a vertical sectional front view showing a fastening state of wood using the screw screw, and FIG. An enlarged sectional view taken along the arrow cc of (A).

2A is a front view showing a nail which is a second embodiment of a fastener, and FIG. 2B is a front view showing a bolt which is a third embodiment of a fastener.

FIG. 3 (A) is a diagram showing a result of measuring a torque required to cause the start of loosening after screwing in using a half screw type screw screw, and FIG. 3 (B) is an explanation showing conditions at the time of the measurement. Figure

[Explanation of symbols]

1 screw screw 2 torso 3 grooves 4 head 5 Tip 6 screws 7 blank part 8 Delayed heat reactivation adhesive 11 nails 12 torso 13 head 14 Tip 21 bolts 22 torso 23 head 24 screws A fastening timber B Fastened timber

Continued front page    (72) Inventor Kouji Tsuchida             1-6-30 Morikawachi-nishi, Higashi-Osaka City Product from Wakai             Business (72) Inventor Yasuo Kurokawa             4-5-9 Higashigotanda, Shinagawa-ku, Tokyo             Inside Medine Co., Ltd. (72) Inventor Teruo Utsumi             4-5-9 Higashigotanda, Shinagawa-ku, Tokyo             Inside Medine Co., Ltd. (72) Inventor Seiji Morita             4-5-9 Higashigotanda, Shinagawa-ku, Tokyo             Inside Medine Co., Ltd.

Claims (4)

[Claims] 1. A fastener for implantation having a head portion at one end of the body and a tip at the other end, and a delayed heat reactivating adhesive that melts into the body due to frictional heat generated at the time of driving. A fastener characterized by being coated with. 2. A fastener for screwing, wherein a head is provided at one end of the body and a screw is provided on the body, and a delay heat that is melted after screwing is completed by frictional heat generated when the screw is screwed into the body. A fastener characterized by being coated with a reactivating adhesive. 3. The screw-in fastener has a head portion at one end of the body portion to which a driver bit can be engaged and a tip portion at the other end side, and the screw extends from the middle of the body portion to the tip portion. The fastener according to claim 2, wherein the fastener is a half-screw type screw thread provided with. 4. The fastener according to claim 3, wherein the delayed heat reactivation type adhesive is applied only to a blank portion of the body portion having no screw.