JPH08135621A - Wire material fixing fastener - Google Patents

Abstract

PURPOSE: To improve the working efficiency when a wire material is fixed, easily reduce cost, and improve the working efficiency by shortening work time. CONSTITUTION: In a fastener to fix a wire rod of a lath net or the like arranged through an intermediate material on a structural plate such as a steel plate, the fastener is provided with two leg parts 1 to penetrate the structural plate and a connecting part 2 to connect these both leg parts 1 to each other on the upper end side. Collar parts 3 to project the reverse side by boring holes in the structural plate are formed in lower end parts of both leg parts 1, and locking step parts 4 to be locked on reverse side edge parts of the holes formed in the structural plate by rupture by both leg parts 1, are formed in base parts of the collar parts 3, and the lower ends of the collar parts 3 are formed in an edge shape, and one of an inclination to a straight line P extending upward from the tip of an inclining part inclining to the inside and the outside from its tip is formed larger than the other, and the locking step parts 4 are formed on the side where a small inclination is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for fixing a wire rod such as a lath net to the surface of a thin steel plate or the like.

[0002]

2. Description of the Related Art Generally, a wire rod such as a lath net is fixed to a structural plate such as a thin channel steel by a self-drilling screw having a large head diameter.

However, since there is an intermediate material such as a thick heat insulating material between the wire rod of the lath net and the structural plate, the gap between the lath net and the structural plate becomes large, and the screw portion of the screw is Since the blade edge is long, the workability is very poor and the cost is high.

[0004]

An object of the present invention is to provide a fastener for fixing a wire, which solves the above-mentioned drawbacks, has a high work efficiency when fixing the wire, makes the cost easy, and shortens the work time to improve the work efficiency. The purpose is to do.

[0005]

In order to achieve the above object, a wire rod fixing fastener according to the present invention fixes a wire rod such as a lath net arranged on a metal structural plate such as a steel plate via an intermediate member. A two-legged fastener that extends in the same direction and penetrates the structural plate, and a connecting portion that connects the two leg portions on the upper end side and that presses the wire rod, and the lower end portions of the both leg portions. In the structure plate, a jaw portion is formed by punching a hole on the back surface side, and a locking step for locking the back side edge of the hole formed in the structure plate by the both legs at the base of the jaw portion. An edge formed by an inclined portion having an inclined surface extending upward and outward from the tip of the leg and an inclined portion having an inclined surface extending inward and upward from the tip of the leg. Form the above with respect to the axis of the fastener driving direction The inclination angle of the inclined surface is one of an inclination angle, characterized in that formed to be larger with respect to the other.

It is preferable that the jaw portion is inclined outward or inward and the locking step portion is formed on the side opposite to the inclination direction.

Further, when the jaws are tilted inward, it is preferable to form bulging protrusions facing each other inside the upper portions of the both legs.

Further, it is preferable that one of the inclined surfaces forming the edge is set in a range of 35 ° to 45 ° and the other is set in a range of 10 ° to 20 °.

[0009]

According to the invention of the above construction, when a wire rod such as a lath net is positioned between both leg portions of the fastener and the fastener is driven toward the structural plate, the leg portion ruptures and penetrates the structural plate, and the wire rod is attached to the leg member. It is clamped between the departments. Further, when the tip of the jaw penetrates the structural plate, the edge of the tip breaks and punches the structural plate, and the inclined surfaces on both inner and outer sides formed following the edge hit the structural plate and expand the perforated portion to enter. On this occasion,
The sloping part on the side with a large angle of inclination with respect to the axis of the fastener driving direction works to curl the fractured part of the structural plate while shearing, and the sloping side on the small side moves so as to slide along the fractured part of the structural plate and legs Move the tip of the part to the opposite side. Therefore, when the two inclined surfaces of the jaw penetrate the structure plate, the legs are elastically deformed to the inclined surface side with the larger inclination angle, and after the jaw penetrates the structure plate, the side with the smaller inclination angle. Is elastically restored to the side of the inclined surface, the locking step reliably locks to the edge of the hole, and the movement of the fastener in the pull-out direction is blocked, whereby the wire is fixed to the surface of the structural plate.

If the legs are previously spread outward or pushed inward at the time of driving, the legs elastically return to their original state by the connecting portions after the jaws of the legs penetrate the structural plate. Therefore, the locking of the locking step formed on the side opposite to the tilt direction becomes more reliable.

Further, when the jaw is tilted inward or outward, the jaw is driven obliquely to the structural plate in accordance with the inclination, so that the legs are moved inward or spread outward. Therefore, the locking step is more reliably locked by the elastic restoring force of the leg after the jaw penetrates the structure plate.

Further, in the case where the bulging projections are formed inside both legs, the bulging projections come into contact when the jaws are driven obliquely into the structural plate, so that the elastic restoring force after perforation is large.

Further, one inclination angle of the inclined surface is 35 ° to
By setting 45 and the other in the range of 10 ° to 20 °, the fastener can be efficiently penetrated through the structural plate.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a fastener, which is formed by punching out a tool steel plate. The fastener is composed of two leg portions 1 extending substantially in parallel in the same direction and a connecting portion 2 connecting the both leg portions 1 on the upper end side, and a jaw portion 3 is provided at the lower end portions of the both leg portions 1. Has been formed.

The upper width between both leg portions 1 is formed to be narrower than the outer diameter of the wire rod 11a (see FIG. 3) of the lath net 11 to be fixed, and the width of the lower end portion is wider than the outer diameter of the wire rod 11a. Is formed in.

The jaw 3 is formed so as to be inclined inward,
A locking step portion 4 is formed at the base thereof. In addition, bulging portions 5 facing each other are formed inside the upper portions of both leg portions 1. Furthermore, the lower end of the jaw 3 is formed into an edge shape,
Inclined portions 6 and 7 having inclined surfaces extending inward and outward from the tips of the legs 1 are inclined. The inclined surfaces of these inclined portions 6 and 7 have an axis P in the driving direction of the fastener.
Of the inclination angles a and b with respect to
Is formed to be larger than the inclined portion 7 that inclines outward, and the locking step portion 4 is formed on the outer side of the inclined portion on the opposite side to the inclination direction and where the small inclination angle b is formed.

The inclined portion having the large inclination angle a does not necessarily have to be linear. As shown in FIG. 2, it may be formed in a curved shape. The same applies to other examples.

As shown in FIG. 3, the fastener having the above construction is provided with a tar paper 9 stretched on a steel plate structural plate 8, and a lath net 11 is provided on the tar paper 9 via a heat insulating material 10 made of expanded polystyrene.
In driving the object 12 that has been temporarily placed, a tool such as a staple driving machine (not shown) is pressed against the wire 11a of the lath net 11 and a fastener loaded into the magazine of the tool by the driver 13 is pressed. The upper surface of the connecting portion 2 is hit to fire the fastener. As a result, both leg portions 1 of the fastener are driven toward the structural plate 8, first penetrate the intermediate material composed of the heat insulating material 10 and the tar paper 9, and the tip of the jaw 3 hits the structural plate 8 and is broken. Then, the jaw 3 protrudes from the hole 14 drilled, and the locking step 4 locks on the back side edge of the hole 14.

By the way, when the fastener is driven toward the structural plate 8 by the driver 13, the leg portion 1 ruptures and penetrates the structural plate 8 and the wire rod 11a is attached to the leg portion 1 as shown in FIG.
Stuck in between. Moreover, when the tip of the jaw penetrates the structure plate 8, the edge of the tip ruptures and punches the structure plate 8 as shown in FIG. 4 (a), and the inclined portions 6 and 7 formed on both the inner and outer sides following the edge. The surface hits the structural plate, and the perforated portion is shown in the same figure (b).
Expand and enter as shown in (c). At this time, the inclined portion 6 on the side having a large inclination angle with respect to the axis of the fastener driving direction acts so as to curl the broken portion of the structural plate 8 while shearing, and the burr 15 is generated in this portion. The inclined surface of the inclined portion 7 on the smaller inclination angle side slides on the fractured portion of the structural plate 8 to move the tip of the leg 1 to the opposite side. Therefore, as shown in (a) (b) (c) of the same figure,
As the two inclined surfaces of the jaw 3 are inserted into the structural plate 8, the position of the jaw 3 with respect to the reference line Q shifts to the right side in the figure, so that the leg 1 is located on the side with a large inclination angle. After being elastically deformed to the side of the inclined surface and the jaw portion 3 penetrates the structural plate 8, the elastic force is restored to the side of the inclined surface having the smaller inclination angle,
The locking step portion 4 is securely locked to the edge portion of the hole 14, and the movement of the fastener in the pull-out direction is prevented, whereby the wire rod 11a
Are fixed to the surface of the structural plate.

Further, since the jaw portion 3 is inclined inward, the jaw portion 3 is driven obliquely to the structural plate 8 according to the inclination, so that the leg portion 1 leans inward as shown in FIG. . At this time, the bulging projections 5 facing each other abut on the inside of the upper portions of the both leg portions 1. After the jaw portion 3 penetrates the structural plate 8, the leg portion 1 tries to elastically return to the original state with the bulging portion 5 serving as a fulcrum, so that the locking step portion 4 formed on the opposite side to the inclination direction.
Is more reliably locked.

The inclination angle of the inclined portion 6 is 35 ° to 45 °.
And the inclination angle of the inclined portion 7 is 10 ° to 2
By setting in the range of 0 °, the fastener has the best penetration performance with respect to the structural plate.

Further, as shown in FIG. 5, the bulging portion 5 of the leg portion 1 may be omitted. In this case, the elastic restoring force after perforation can be sufficiently secured by increasing the width of the connecting portion 2.

Further, as shown in FIG. 6, the jaw 3 may be inclined outward. The locking step portion 4 is formed on the inner side opposite to the tilt direction. Also in this case, the same effect as the above can be obtained.

Although the above-mentioned object has a lath net arranged on a structural plate via an intermediate material, the wire rod is not limited to the lath net. Other wire rods may be used.

[0025]

According to the invention of claim 1, the workability is very good because the locking step is securely locked and fixed to the structural plate only by driving the fastener.

In addition, even if there is a thick intermediate material such as a heat insulating material between the wire rod of the lath net and the structural plate and the distance between the wire rod of the lath net and the structural plate becomes large, the intermediate material is Costs are reduced because the penetrating leg does not need to be specially processed.

According to the second aspect of the present invention, when the jaw portion is tilted outward or inward, the jaw portion is driven obliquely to the structural plate in accordance with the inclination, so that the leg portion spreads outward. Or go inside. Since the leg portion elastically returns to the original state by the connecting portion after the jaw portion penetrates the structural plate, the locking step formed on the side opposite to the tilt direction is more reliably locked.

According to the third aspect of the present invention, when the both legs are driven obliquely into the structural plate, the bulging projections facing each other come into contact with the upper insides of the two legs, so that the elastic restoring force after perforation is large. . Therefore, the reliability of the locking of the locking step portion is improved.

According to the invention of claim 4, one of the inclined surfaces has an inclination angle of 35 ° to 45, and the other has an inclination angle of 10 ° to 20 °. Becomes

[Brief description of drawings]

FIG. 1 is a perspective view of a wire rod fixing fastener according to the present invention.

FIG. 2 is a front view of another example of the jaw of the fastener.

FIG. 3 is a front view showing a state in which the fastener is driven into an object.

4 (a), (b) and (c) are explanatory views of a process in which a fastener penetrates a structural plate.

FIG. 5 is a front view of another example of a wire material fixing fastener.

FIG. 6 is a front view of still another example of a wire material fixing fastener.

[Explanation of symbols]

 P fastener driving axis 1 leg part 2 connecting part 3 jaw part 4 locking step part 5 bulging part 6 slope part 7 slope part 8 structural plate 11 lath net 11a wire rod 14 hole

Claims (4)

[Claims] 1. A fastener for fixing a wire rod such as a lath net disposed on a metal structural plate such as a steel plate with an intermediate member interposed therebetween, the two legs extending in the same direction and penetrating the structural plate. And a connecting portion for connecting the both leg portions at the upper end side and pressing the wire rod, and forming a jaw portion projecting to the back side by making a hole in the structural plate at the lower end portions of the both leg portions, A locking step is formed at the base of the jaw that locks to the back edge of the hole formed in the structural plate by the above-mentioned two legs, and the lower part of the jaw extends upward from the tip of the leg to the outside. An edge formed by an inclined portion having a surface and an inclined portion having an inclined surface extending inward and upward from the tip of the leg is formed, and the inclination angle of both inclined surfaces with respect to the axis of the fastener driving direction is one inclination. The angle is larger than the other. Wire fixing fastener according to claim. 2. The fastener for fixing a wire rod according to claim 1, wherein the jaw portion is inclined outward or inward, and the locking step portion is formed on the side opposite to the inclination direction. 3. The chin portion is inclined inward, and bulging portions facing each other are formed inside the upper portions of the both leg portions.
Fasteners for fixing wire materials. 4. The inclination angle of the inclined surface forming the edge is set within a range of 35 ° to 45 ° on one side and within a range of 10 ° to 20 ° on the other side. Two
Alternatively, the fastener for fixing the wire according to item 3.