JPH11230131A - Nail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a nail, and increase and stabilize a pulling out strength. SOLUTION: A shaft portion of a center pin 3 formed into a sharp head portion 3A at the lower surface is press-fitted into a lower end of a fixing pipe 1 having a washer 2 on an upper end thereof. Above the center pin 3 and on a circumferential side of the fixing pipe 1, lower cut-down pieces 4 are formed to be opposed each other. Above the lower cut-down pieces 4 and on a circumferential surface of the fixing pipe 1, upper cut-down pieces are formed to be opposed each other at the position deviated by 90 deg. in a circumferential direction. Upper and lower tilt guide surfaces 4A are formed by butt-joining the tips of the upper and lower cut-down pieces 4 which are leaning upwardly. A cylindrical wedge 8, in which a short one-leg 8A abutting on the upper tilt guide surface 4A at its lower end is oppositely formed, and a long one-leg 8B abutting on the lower tilt guide surface 4A at its lower end is oppositely formed, is inserted into the fixing pipe 1, and a drive pin 9 is also inserted into the fixing pipe 1 from above the wedge 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail having a high pull-out strength used for a concrete material, a synthetic wood or the like.

[0002]

2. Description of the Related Art Conventionally, as nails having a large pull-out resistance,
A driving tip member having a pointed lower surface is press-fitted with scissors to the lower end of a cylindrical nail having a flange at an upper end, and a retaining nail bent guide slope is formed on the inner surface of the cylindrical nail of the tip member. In some cases, a bent driving guide lateral hole for a retaining nail is provided through the cylindrical nail at the underlined position of the slope, and a nailing member is inserted into the cylindrical nail from above.

[0003] This nail is driven by hitting a nail member from the exterior material to the inner material layer and driving the cylindrical nail until the flange reaches the surface of the exterior material. Since the lower end of the nail member strikes the retaining nail, the retaining nail is guided by the bending guide slope and is bent, and projects horizontally from the bending driving guide lateral hole and is driven into the inner material layer. The pull-in strength can be obtained by the bent driving portion.

[0004]

In the conventional nail having the above structure, the retaining nail has a gate shape or a hairpin shape, and the bent driving portion projecting from the bending driving guide lateral hole is opened to the left and right. It looks like a leg. In the case where the retaining nail is rod-shaped and has one bent driving guide lateral hole, the bent driving portion projects in only one direction.

[0005] However, in the case where the bent-in portion is aligned on the left and right or only in one direction as described above, if the inner material layer is made of wood or the like and the bent-in portion is along the grain, the strength is high. In consideration of the grain, it is necessary to check the bent driving guide lateral hole for each nailing so that the bent driving portion protrudes in a direction perpendicular to the grain, which is inefficient in work efficiency. Further, when the inner material layer is not visible from the exterior material, the inner material layer must be driven without considering the direction of the bent driving portion, and the strength of the pull-out resistance becomes unstable.

In view of the above, it is an object of the present invention to provide a nail which secures the nail and increases and stabilizes the pull-out resistance.

[0007]

According to the present invention, there is provided a nail according to the present invention, wherein a shaft of a center pin having a sharpened lower surface is press-fitted to a lower end of a pipe having a washer at an upper end. Above the center pin, a lower cut-off piece is formed facing the peripheral side surface of the fixed pipe, and above the lower cut-off piece, is fixed at a position shifted by 90 ° in the circumferential direction with the lower cut-off piece. Upper cut pieces are formed facing the peripheral side surface of the pipe, and upper and lower cut pieces are bent inward at the upper end to form upper and lower window holes on the peripheral side face of the fixed pipe. In addition, the upper and lower opposing falling pieces have upper and lower inclined guide surfaces with their ends abutted in a state of being inclined upward, and short legs whose lower ends abut the upper inclined guide surfaces. Are formed facing each other, and a lower end is formed on the lower inclined guide surface. A cylindrical wedge formed with the long legs in contact with each other is inserted into the fixed pipe, and a driving pin is inserted into the fixed pipe from above the wedge. A stopper is provided at a position corresponding to the upper end of the fixed pipe when inserted into the fixed pipe.

According to the present invention having the above structure, if the driving pin is hit from the exterior material to the inner material layer, the washer is fixed to the surface of the exterior material by the sharp head of the center pin at the lower end of the fixed pipe. It is driven until it reaches. At the time of this beating, the driving force is transmitted to the fixed pipe larger than the wedge by the stopper of the driving pin, and the fixed pipe is driven smoothly without the wedge being opened on the way. And if you drive further,
The washer of the fixed pipe acts as a stopper, so that the fixed pipe cannot be driven any further. The driving pin is driven into the fixed pipe against the stopper of the driving pin.

The driving pin driven into the fixed pipe is:
Since the wedge on the lower surface is hit, the short leg of the wedge is guided by the upper inclined guide surface formed by the upper cut-off piece, bends open, and projects horizontally from the opposing upper window hole, In addition, the long leg of the wedge is guided by the lower inclined guide surface formed by the lower cut-off piece, bent and opened, protrudes horizontally from the opposing lower window hole, and is driven into the inner material layer, respectively. .

[0010] Since the upper and lower cutting pieces are provided so as to be shifted from each other by 90 ° in the circumferential direction, the short leg and the long leg protrude in a cross shape. Is stable and the pull-out resistance is stable even if the inner layer is made of wood, because either the short leg or the long leg is perpendicular to the grain.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of the nail of the present invention before driving, FIG. 2 is a cross-sectional view of the same after driving, FIG. 3 is a perspective view of the same after driving, and FIGS. 4 and 5 are cross-sectional views of the same fixed pipe. 6 is a front view of the same wedge.

In the drawing, reference numeral 1 denotes a fixed pipe, and a washer 2 is fixed to an outer peripheral surface of an upper end of the fixed pipe 1, and a center pin formed at a lower end of the fixed pipe 1 with a sharp head 3 A at a lower surface. 3 is press-fitted. 4 is the center pin 3
Above, is a cut-out piece of a lower portion formed in a gate shape on the peripheral side surface of the fixed pipe 1, and is provided at two locations facing each other. The lower window hole 5 is formed by bending the upper end of the lower falling piece 4 inward of the fixed pipe 1. The opposing lower cutting pieces 4 are inclined upward and their ends are abutted to form a lower inclined guide surface 4A in a mountain shape.

Reference numeral 6 denotes an upper cut-off piece formed in a gate-shaped cut on the peripheral side surface of the fixed pipe 1 at a position shifted by 90 ° in the circumferential direction from the lower cut-off piece 4 above the lower cut-off piece 4. And
Two places are provided facing each other. The upper window hole 7 is formed by bending the upper end of the upper falling piece 6 inward of the fixed pipe 1. In addition, the tips of the opposing upper falling pieces 6 are abutted in a state of being inclined upward, and an upper inclined guide surface 6A is formed in a mountain shape.

Reference numeral 8 denotes a cylindrical wedge which is inserted into the fixed pipe 1. The wedge 8 is a short leg 8A which is opposed to the upper portion while leaving a cylindrical portion upward.
, The opposing long leg 8B is formed downward. The lower end of the short leg 8A is in contact with the upper inclined guide surface 6A, and the lower end of the long leg 8B is in contact with the lower inclined guide surface 4A.

A stopper 9A is provided on the outer periphery of the driving pin 9 at a position corresponding to the upper end of the fixed pipe 1 when the driving pin 9 is inserted into the fixed pipe 1. The stopper 9A may be a convex as shown, or may be formed in a knurled shape (not shown). Reference numeral 9 denotes a driving pin inserted into the fixed pipe 1 above the wedge 8, and the driving pin 9
, The fixed pipe 1 is driven by the head of the center pin 3 until the washer 2 reaches the surface of the exterior material.
When the washer 2 reaches the surface of the exterior material, the fixed pipe 1 is not driven any further, and when the tapping is further performed, the driving pin 9 hits the wedge 8. And the long leg 8B of the wedge 8 bends and spreads along the chevron of the lower inclined guide surface 4A, and protrudes from the lower window hole 5. , Each being driven into the inner material layer.

[0016]

According to the present invention, since the short leg and the long leg of the wedge are opened in the inner material layer and fixed in a cross shape, the nail is strongly fixed and the pull-out resistance is increased. . In addition, even if the inner material layer is made of wood, stable pull-out strength is obtained because either the short leg or the long leg is orthogonal to the grain, even in nailing work, Since there is no need to check the window of the nail in consideration of the direction of the grain, the work efficiency is significantly improved. In addition, since the window hole and the inclined guide surface are formed at once by tilting the falling piece, the manufacturing is easy, the material is small, and the economic effect is large.

[Brief description of the drawings]

FIG. 1 is a sectional view of a nail before being driven according to the present invention.

FIG. 2 is a cross-sectional view after the nail of the present invention is driven.

FIG. 3 is a perspective view after the nail of the present invention is driven.

FIG. 4 is a sectional view of a fixing pipe of the nail of the present invention.

FIG. 5 is a sectional view of a fixing pipe of the nail of the present invention.

FIG. 6 is a front view of the wedge of the nail of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed pipe 2 Washer 3 Center pin 3A Head of center pin 4 Lower cut piece 4A Lower inclined guide surface 5 Lower window hole 6 Upper cut piece 6A Upper inclined guide surface 7 Upper window hole 8 Wedge 8A Short leg 8B Long leg 9 Driving pin 9A Stopper

Claims (1)

[Claims] 1. A shaft of a center pin having a sharpened lower surface is press-fitted to a lower end of a pipe having a washer at an upper end, and a lower cut is formed on a peripheral side surface of a fixed pipe above the center pin. An inverted piece is formed to face the lower piece, and the upper piece is formed to face the lower side of the fixed pipe at a position shifted by 90 ° in the circumferential direction above the lower piece. And
The upper and lower cut pieces are bent inward at the upper end to form upper and lower window holes on the peripheral side surface of the fixed pipe, and the upper and lower opposing cut pieces are inclined upward. In this state, upper and lower inclined guide surfaces whose ends are joined to each other are formed, and short legs each having a lower end abutting on the upper inclined guide surface are formed to face each other. Is inserted into the fixed pipe, and a driving pin is inserted into the fixed pipe from above the wedge. A nail characterized in that a stopper is provided at a position corresponding to the upper end of the fixed pipe when the pin is inserted into the fixed pipe.