JPH0336727Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention: ``Industrial application field'' Of the building materials used to construct walls and roofs, especially dense and highly foamed building materials, metal fittings, equipment, pipes, etc. This relates to a fixture for attaching.

``Prior Art'' In this field, a fixing stopper called a ``plug'' made of plastic is well known in the past. This involves drilling a hole in the relevant building material in advance, inserting the plug, and then screwing a separately prepared screw into the hole to expand and secure the body of the plug. be.

However, this type of ``plug'' had the problem of complicated work, as it required holes to be drilled in the building material in advance.

Therefore, by driving the legs into the building material without making holes, a nail-like object with a means between the legs to open the legs inside the building material and close the legs again to prevent them from falling out has been developed. It has been invented.

``Problems to be Solved by the Invention'' The nail shown in FIG. 1 is a known nail that has a triangular or cylindrical leg closure prevention means called a "boss" at the tip between the legs.

In this type of nail, the size of the leg closure prevention means between the legs is limited because the space secured by the internal taper of the tip of the nail in which the leg closure prevention means is housed is limited. be done. As shown in Figure 2, when the legs begin to open, the angle of the legs, or the width between the legs, differs depending on conditions such as the density of the building material and the strength of driving. ” appears to be swimming, and both legs cannot be supported, and a sufficient retaining effect cannot be achieved.

Furthermore, after driving, there is a problem in that the effect depends on the depth at which the leg closing prevention means is located between the legs inside the building material, and this is due to the density of the building material as well as the In this situation, it is difficult to obtain a stable effect due to the influence of the attachment strength between the leg closing prevention means and the leg.

Therefore, as shown in FIG. 3, a nail with a thin plate placed between the legs was devised, which was previously filed and registered by the applicant of the present invention.

With this invention, the thin plate serving as the leg-closing prevention means is driven in such a way that it snakes between the legs, making it possible to sufficiently support both legs when the legs are spread apart.

Furthermore, because the legs meander freely depending on the density of the building material, whether the opening legs are large or small, the legs meander tightly between the legs, making it possible for the legs to meander tightly between the legs, making it possible to completely close the legs with standard "aerated concrete" building materials. It was effective as a preventive measure. However, with the advent of various building materials and improvements in manufacturing technology, highly foamed building materials with even lower density have appeared, and in such building materials, the legs themselves are difficult to spread during driving, and therefore the thin plates cannot meander. There's a problem.

If the legs cannot be opened, the pull-out strength cannot be obtained.

B. Structure of the invention ``Means for solving the problem'' In a nail consisting of a plurality of legs with grooves between the legs and an internally tapered portion at the tip, a thin sinterable plate is inserted between the legs. Place it with a space left on the head side of the groove,
The other end has an enlarged end that is located almost at the inner taper of the tip of the leg, and a part of the thin plate protrudes from the leg body at the intermediate part between the tip and rear end of the thin thin plate. This problem is solved by a fixture provided with a section.

"Operation" When the nail of the present invention is driven into a particularly coarse-density, highly foamed building material, the leg at the tip of the nail and the thin plate sandwiched between the legs are driven simultaneously to the position of the protrusion, and then When driven in, the protrusion that comes into contact with the surface of the building material stops at the surface of the building material, and only the legs attempt to enter. When this nail is actually used, the metal fittings or equipment to be attached are located on the surface of the building material, and it is often these metal fittings or equipment that the protrusion comes into contact with. As a result, only the legs enter, leaving the thin plate behind, and the tip of the leg begins to open its legs along the enlarged end provided at one end of the thin plate that is blocked from entering.

The legs do not open due to the resistance of the building materials, but instead begin to open by following the enlarged end of the thin plate that is blocked from entering at a predetermined position. It is also effective for building materials. As only the legs enter, there is no space between the head side end of the thin plate and the head side of the groove between the legs, and the head side end of the thin plate comes into contact with the end of the leg groove. .

When driven in further from this position, the lamina is pushed in the direction of entry by the end of the groove of the leg, and the lamina and the leg are again advanced simultaneously as one piece.

The protrusions that had hitherto been in contact with the surface of the building material - in practical terms, the surface of the metal fittings and equipment - are gradually scraped away by the building material - in many cases the metal fittings and equipment - as the thin plate is forced into it. take off.

When the proposed nail is driven further, the tip of the leg, which had started opening earlier, continues to open the leg as it is, and the thin plate sandwiched between the legs effectively receives the resistance of the building materials and gradually bends from the tip. It starts meandering in such a way that it fills the space between the legs, and comes into close contact with the inner surfaces of the spread legs, and even when a pulling force is applied to the legs, it supports the legs as they try to close and exerts a prevention effect.

"Example" FIG. 5 shows an embodiment of the present invention.

It consists of a plurality of legs 1, 1' and has a groove 2 between the legs,
In a nail having an internally tapered portion 3 at the tip, a flexible thin plate 4 as a leg closure prevention means is movably arranged between the legs with a space a left on the head side of the groove between the legs, and the other end side has an enlarged end portion 5 located approximately at the inner tapered portion 3 of the tip of the leg, and a wing-shaped protrusion portion 6 is provided in the middle of the thin plate on approximately the same plane as the thin plate so as to protrude from the leg body, There is a protrusion 6 on the outer surface of the leg.
This nail is made by fitting a washer 8 between the leg tip 7 and the leg body tip 7.

As mentioned earlier, the protrusion 6 is scraped off by coming into contact with the surface of building materials, metal fittings, and equipment, but when the protrusion is shaped like a small wing as in this embodiment, the washer 8
By fitting these, it is possible to more reliably stop the thin plate 4 and scrape off the protrusion.

As another embodiment of the protruding portion, as shown in FIG. 10, the protruding portion may be formed in a large size on a plane substantially perpendicular to the surface of the thin plate. If such a large protrusion 6' is selected, a washer is not necessarily required. The protruding portion 6' shown in this example may further be formed into a ring shape by integrating the left and right sides.

When the protrusion 6 comes into contact with the washer 8 by driving a nail, it cannot be easily scraped off until the thin plate 4 moves, and the space a between it and the groove 2 disappears due to the movement of the thin plate 4 (a shown in FIG. 7). ') When forcibly entering with the legs, it is characterized by being gradually scraped off as shown in FIG. 8, so a relatively soft material such as synthetic resin such as nylon or polyethylene or aluminum is preferable.

The space a can be set arbitrarily, but if it is too large, the thin plate 4 will become short and will not be able to sufficiently fill the gap between the legs. The space can be selected according to the length of the nail, but in practice it is desirable to set it between 2 mm and 15 mm.
After the thin plate comes into contact with the end of the groove 2, in order to promote meandering of the thin plate, as shown in FIG. A thinning groove 9 may be provided.

In addition, when fitting the washer 8 to the leg, the leg 1, 1'
After fitting the washer 8 near the tip of the
may be provided.

Although the embodiment shows a flat disk-shaped head as seen in a normal nail, a bolt-shaped head with a threaded groove may be selected and the device may be attached with a nut.

Selection of these shapes can be made depending on the application and is within the scope of the present invention.

C. Effects of the invention According to this invention, when a nail is driven into a highly foamed building material with a particularly coarse density, the opening of the nail is not caused by the repulsive force received from the building material, but by the presence of a space a and by the scraping. Since the opening is reliably initiated by the structural action of the nail itself, which is characterized by the presence of the protrusion 6, the opening always starts at a certain level regardless of environmental conditions such as the degree of density and the strength of driving.

Furthermore, due to the novel structure in which the protruding portion of the flexible thin plate is scraped off immediately after the legs are opened, the thin plate freely adheres to and fills the inner surfaces of both legs according to the degree to which the legs are opened.

The phenomenon of the "Boss" swimming between its spread legs, which often occurs with conventional triangular or cylindrical "Boss", will no longer be seen.

In this way, according to this proposal, a stable open leg state and pull-out strength can be obtained under any conditions, and the work of attaching to building materials can be made more efficient. It is an extremely economical nail that can be easily mass-produced by various means, and the assembly of the product can be easily automated.

[Brief explanation of the drawing]

Fig. 1 is a front view of the conventional example, Fig. 2 is a front view showing the state after the same driving, Fig. 3 is a front view showing another conventional example, and Fig. 4 is a front view showing the state after the same driving. , FIG. 5 is a perspective view showing an embodiment of the proposed nail;
Fig. 6 is a perspective view showing the thin plate, Fig. 7 is a front view showing the initial stage of driving, Fig. 8 is a perspective view showing the protrusion, and Fig. 9 is a front view showing the state after driving. . FIG. 10 is a perspective view showing another embodiment of the same protrusion. 1, 1'... Leg, 2... Groove, 3... Inner taper part,
4...Thin plate, 5...Enlarged end, 6...Protrusion, 7
...Leg body tip, 8...Washer, a...Space between one end of the thin plate and the groove end.

Claims (1)

[Claims for Utility Model Registration] (1) In a nail consisting of multiple legs with grooves between the legs and an internally tapered portion at the tip, a thin sinterable plate is inserted between the legs at the head of the groove between the legs. The other end has an enlarged end that is located approximately at the inner tapered part of the leg tip, and a thin thin plate is placed between the tip and rear end of the flexible thin plate. A fixture for highly foamed construction materials that has a protruding part that partially protrudes from the leg. (2) The protrusions that protrude in the middle of the thin plate protrude in the shape of wings on both sides of the thin plate on almost the same plane as the thin plate,
The fixture for highly foamed building materials according to claim 1, which is a utility model registration, characterized in that a washer is fitted between the protrusion and the tip of the leg. (3) The fixture for highly foamed building materials as set forth in claim 2 of the utility model registration claim, characterized in that a rib-like protrusion is provided near the tip of the leg. (4) The fixing device for highly foamed building materials according to claim 1, wherein the protruding portion protruding from the intermediate portion of the thin plate is formed in a planar shape substantially perpendicular to the surface of the thin plate. (5) The highly foamed building according to claim 1, which is a utility model registration, characterized by having a groove extending longitudinally in the width direction of the thin plate near the tip of the thin plate to locally reduce the thickness of the thin plate. Fixtures for materials.