JPS61257550A - Nail plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is aimed at improving joint strength, etc., mainly in the construction of houses and the like.

(Prior Art and its Problems) In house construction work, particularly house construction using frame wall construction methods, nail plates are sometimes used to join structural members together.

The nail plate functions as an assembly of joining nails by press-fitting each nail part near the joint of structural wood or laminated wood, and can be used with stainless steel plates, steel plates, etc. The metal plate is cut at a plurality of predetermined locations using a press molding machine using well-known shearing and bending processes, and the cut and raised portions act as nail portions.

However, in conventional nail plates, sufficient consideration has not been given to the shape of each nail part (cut and raised part), and when press-fitting into a joint of wood etc., each nail part may wind up wood fibers. Alternatively, if a tensile force or the like is applied to the joint where the nail plate has been constructed, each nail part will easily come off due to insufficient joint strength, causing the joint to break or break. There was a risk of damage.

In addition, for the base end of each nail part, processing cracks occur during press forming, resulting in a substantial loss of effective cross-sectional area, and internal stress is caused by impact and press-fit resistance when penetrating into wood, etc. There was a problem in that the parts were bent or damaged before being press-fitted into wood etc.

(Object of the Invention) In view of these conventional problems, the present invention provides a nail plate that has excellent strength and can solve the above problems by setting a structurally rational shape of the cut-and-raised part. The purpose is to provide.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a plurality of predetermined parts of a metal plate are cut and raised by shearing and bending using a press molding machine, etc., and the plurality of cut and raised parts are Nail plates that function as joint nails by being press-fitted near the joints of wood or laminated wood,
Each of the turning parts is a nail plate in which the upper edge of the distal end is formed as a flat surface with a predetermined width only in the center, and both sides of the flat surface are formed as tapered surfaces that widen toward the proximal end. It is characterized by

(Example) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 3 show one embodiment of the present invention, and FIG. 1 is a plan view showing the structure of a nail plate according to this embodiment.

As shown in the left half of FIG. 1, the nail plate l has a plurality of cut and raised portions 3 formed at predetermined locations on the substrate 2 by well-known press working, and each of the raised portions 3 as shown in FIG. It is raised to a position perpendicular to the substrate 2, and each of the raised parts 3 functions as a nail part corresponding to a normal nail.

In this embodiment, the cut-and-raised portion 3 is composed of a first cut-and-raised portion 31 and a second cut-and-raised portion 32 of two types, long and short, with different cut-and-raised lengths L).

Both the first cut-and-raised portion 31 and the second cut-and-raised portion 32 have a first tapered portion 6 tapered at the intermediate portion between the proximal end portion 4 and the distal end portion 5, as shown in FIG. By providing this, the distal end portion 5 is formed narrower than the proximal end portion 6.

In addition, the first cut-and-raised portion 31 and the second cut-and-raised portion 32
As shown in Fig. 2, it is formed into a substantially V-shape that curves outward when cut and raised, and is designed to reduce the press-fitting resistance when press-fitting into wood, etc. Then the angle θ
It is set so that 1 is 90 degrees. Further, the angle θ2 of the tapered portion 6 with respect to the axis G is set to 30 degrees.

Furthermore, the first cut-and-raised portion 31 and the second cut-and-raised portion 3
2 has an upper edge 51 of its tip 5 as shown in FIG.
However, only the central portion is formed as a flat surface 7 having a width approximately equal to that of the distal end, and both sides of the flat surface 7 are formed as first tapered surfaces 8 that widen toward the proximal end 4.

Note that the portion transitioning from the flat surface 7 to both tapered surfaces 8 is formed into a curved surface shape to eliminate an acute angle portion.

Further, the proximal end portion 4 extends downward from the first tapered portion 6.
Both side edges of are formed as a second tapered surface 9 which has a tapered shape that expands downward, and the tapered surface 9
The angle between the axis G and the axis G is set smaller than the angle θ2.

Further, as shown in FIG. 3, the upper edge 51 of the tip portion 5 is tapered in the thickness direction so that the thickness thereof is approximately half of the thickness of the base material, and a third tapered surface is formed. 10
is formed.

In this embodiment, the nail plate 1 is made of stainless steel.

Next, regarding the arrangement of the cut-and-raised portions 3 in this embodiment, in this specification, arbitrary line segments parallel to the X direction in FIG.
If a line segment parallel to the direction, that is, the vertical direction in the figure, is called a column, first, on a plurality of parallel rows G1゜G2*'3...-, each of the The first cut-and-raised portion 31 and the second cut-and-raised portion 32 are arranged in series, that is, so that the longitudinal direction of each cut-and-raised portion 3 is parallel to the X direction.

Also, on any row G1, for example G2.

The first cut-and-raised portions 31 and the second cut-and-raised portions 32 are alternately and repeatedly arranged.

Furthermore, taking row G2 as an example, the direction of cutting and raising each cut and raising part 3 is reversed between this row G2 and rows G1 and G3 on both sides adjacent thereto, that is, the proximal end part 4, 4 and the tip portions 5, 5 are set to be reversed for each row G.

In addition, in the arrangement in the column direction, all the cut-and-raised portions 3 that are adjacent in the row direction have the same cut-and-raised length L). That is, in the portion where the first cut-and-raised portions 31 are provided, the first cut-and-raised portions 31 having opposite directions are alternately provided.
Only the second cut-and-raised portions 32 are arranged in the Y direction, and only the second cut-and-raised portions 32 are arranged in the Y-direction at the portion where the second cut-and-raised portions 32 are provided.

For example, the first cut-and-raised portion 31 at the left end in FIG.
Regarding the aggregate, each first cut-and-raised portion 31 is
They are arranged at point-symmetrical positions with respect to each point S, , S2, S3, etc. in the line molecular structure in the column direction connecting the longitudinal centers of the tip portions 31b, and this aspect is similar to the other points in the Y direction. Assembly of first cut-and-raised portions 31 and second cut-and-raised portions 3
The same applies to the second aggregate.

Further, an arbitrary set of first cut-and-raised parts 31 or a set of second cut-and-raised parts 32 in the Y direction, and a set of second cut-and-raised parts 32 or a set of first cut-and-raised parts 31 adjacent thereto. The arrangement between the device and the body is configured as follows.

That is, the aggregates of the first cut-and-raised parts 31 and the aggregates of the second cut-and-raised parts 32 in the Y direction are arranged alternately in the X direction, and the tips 5 of the cut-and-raised parts in each aggregate are arranged alternately in the X direction. The line molecule in the column direction connecting the centers in the length direction, T
2. The fists and kais are set to be arranged at equal intervals in the X direction.

For example, in FIG. 1, the distance 11 between line segment T1 and line molecule 2,
The distance 12 between the line molecules 2 and 3 and the distance 13 between the line molecules 3 and 4 have the same dimensions.

Therefore, if we summarize the arrangement relationship of the above-mentioned arbitrary first cut-and-raised portions 31 or second cut-and-raised portions 32 within the aggregate and the mutual arrangement relationship of each aggregate, the set of the first cut-and-raised portions 31 The assembly of the body and the second cut-and-raised portions 32 adjacent thereto means that half of each of the cut-and-raised portions 31 and 32 is located at the outer end 4a of each base end portion 4, 4.
, 4a in each identical column RL* shown in FIGS. 1 and 2.
This means that it is placed in contact with R2*R3.

Note that under the above arrangement conditions, each cut-and-raised portion 31 and 3
By making the width dimension W2 of the distal end portion 5.5 of 2 the width dimension W of the proximal end portion 4.4, cross-sectional defects due to each cut-and-raised portion in the Y direction, in other words, the substrate in the Y direction The effective cross-sectional area of 2 is approximately the same at any position.

Note that the nail plate according to this embodiment is set so that it is attached so that the X direction in the figure is approximately equal to the direction in which tensile force is applied.

Next, we will discuss the effects of this embodiment.

First, considering the case where the nail play (1) according to this embodiment is press-fitted into a joint of wood or the like, a first cut-and-raised part 31 and a second cut-and-raised part 32 of two types, long and short, with different cut-and-raised lengths are used. Because of this, in the initial stage of press-fitting,
Only the tip portions of the first cut-and-raised portions 31 having a long cut-and-raised length are press-fitted into the vicinity of the joint portion.

Therefore, the press-fitting resistance at the initial stage of press-fitting is approximately equal to that of a case where all cut and raised lengths are equal, and since each tip 5 has a substantially V-shaped cross section, the press-fitting resistance can be further reduced. This allows for accurate press-fitting into predetermined positions, improving workability.

As the press-fitting progresses further, the tips 5 of the second cut-and-raised portions 32 with shorter cut-and-raised lengths begin to be press-fitted, but at this point, the position has already been solidified by the press-fitting of the first cut-and-raised portions 31. The second cut-and-raised portion 32
There is no risk of misalignment due to press-fitting, and the press-fit resistance increases as all cut-and-raised portions 3 begin to be press-fitted, but at this stage, the slenderness ratio of each cut-and-raised portion is considerably small, so the above-mentioned Even if a striking force commensurate with the increase in press-fit resistance is applied, there is no risk that each cut-and-raised portion will buckle.

In this respect, the first cut-and-raised portion 31 that has already been press-fitted acts as a guide and prevents the generation of component forces in directions other than the predetermined press-fit direction, so the buckling prevention effect is further improved, and each cut-and-raised portion 31 and 32 are cut and raised so that their horizontal planes form a circular arc shape, so cross-sectional properties such as section modulus in each direction are improved, and there is no fear of bending, lateral buckling, etc.

Also, since the cutting and raising direction is set in the opposite direction for each row,
The cut-and-raised portions 31 and 32 are press-fitted in different directions for each row, so that no matter which direction the tensile force is applied to the joint, there is no fear that the press-fitted cut-and-raised portions will easily come off, and the surface area is the same. The density of the cut and raised portions is increased.

Regarding the shape of the top edge 51 of each cut-and-raised portion 3, if all the top edges 51 are formed into a flat surface, wood fibers will be caught in the initial stage of press-fitting. It has been confirmed by the inventor of the present application that a tapered surface tends to cause splitting of the wood etc. during press-fitting, and as a result of further experiments and research, the center part of the upper edge 51 was changed to the width of the tip part 5 as in this embodiment. The flat surface 7 is formed by the abbreviation of the dimensions, and both sides thereof are formed as first tapered surfaces 8 that expand in the direction of the base end 4, and the thickness of the upper edge 51 is approximately half the thickness of the base material. By forming the third tapered surface 10 tapered in the thickness direction on the upper edge 51, it is possible to reduce as much as possible the entrainment of wood fibers and splitting of the wood as in the conventional example. Verified by the inventor.

Furthermore, as mentioned above, since it is possible to make the effective cross-sectional area of the nail plate l in the Y direction as uniform as possible at any position, it is extremely vulnerable to tensile force acting in the X direction (row direction). The occurrence of such spots is eliminated, and the strength of the substrate 2 itself is improved.

Furthermore, even if slight processing cracks occur at both ends of the proximal end 4 during press forming, the proximal end 4 has a tapered shape that expands downward, and the width of the lower end remains unchanged. Since it is set larger than the conventional example, it is possible to compensate for the above-mentioned processing cracks in terms of strength and prevent stress concentration.

Regarding the material of the nail plate 1, higher ductility is advantageous because it reduces processing cracks, but it is disadvantageous in terms of strength. Furthermore, stainless steel was selected as it has excellent water resistance and corrosion resistance.

In addition, in this embodiment, an example was shown in which two types of cut-and-raise lengths were set, but it is also possible to set the lengths to more types if necessary. The cut-and-raised portions having different cut-and-raised lengths may be repeatedly arranged in the same order, and if necessary, the arrangement order may be changed.

However, the above arrangement conditions, such as ensuring that the same type of cut-and-raised sections are located in the Y direction (column direction), are similar to those in the above embodiment, and the same effects can be achieved. It goes without saying that the settings should be made as follows.

Furthermore, the first tapered surface 8 of the upper edge 51 may be tapered linearly or curved, and various other modifications may be made without departing from the gist of the present invention. It is possible.

(Effects of the Invention) The present invention is constructed as described above, and by devising the shape of the upper edge of each cut-and-raised portion, the entrainment of wood fibers and splitting of wood during press-fitting are reduced as much as possible. This makes it possible to ensure sufficient bonding strength. It is extremely useful.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a plan view showing the arrangement of the cut and raised portions of the nail plate according to this embodiment, and FIG. 2 is a detailed view of the cut and raised portions. FIG. 3 is an explanatory diagram showing the planar state before cutting and raising in the right half of the figure and after cutting and raising in the left half, and FIG. 3 is a sectional view taken along the line A-A in FIG. 2.

Claims (5)

[Claims] (1) A metal plate is cut and raised at a plurality of predetermined locations by shearing and bending using a press molding machine, etc., and each of the cut and raised parts is press-fitted into the vicinity of the mutual joint between wood or laminated wood, thereby creating a joining nail. In the nail plate that functions as a nail plate, each cut-and-raised portion has an upper edge at its distal end formed into a flat surface having a predetermined width only in the center, and both sides of the flat surface are tapered surfaces that widen toward the proximal end. A nail plate characterized by being formed as a nail plate. (2) The nail plate according to claim 1, wherein the flat surface is set to have a width that is approximately ⅓ of the tip end. (3) The distal end of the cut and raised portion is narrower than the proximal end, and the proximal end has a tapered shape that expands downward. 2
Nail plate as described in section. (4) The nail plate according to any one of claims 1 to 3, wherein the cut and raised portion is molded from stainless steel. (5) The cut-and-raised portion is tapered in the thickness direction near the upper edge so that the thickness of the upper edge is approximately half the thickness of the base material. The nail plate according to any of item 4.